BUY NOW

TERMS

Although the data submitted by us are obtained from reliable sources, we do not give any guarantee and do not accept responsibility for any personal, professional or financial risk or any resulting injury, accident or loss as a result of using our information. Any information obtained by us ( diagrams, calculations, winding details) should only be implemented by professional and fully qualified electrical engineers using their own professional judgment and due regard to health and safety issues. Using data obtained by us is solely at your own risk.
The calculation will be performed for the air-cooled, three-phase motors for continuous duty cycle S1, standard efficiency, 50 or 60 Hz, SF= 1.00, lap or concentric, single or double-layer, for the maximum power from the given iron core.
Please, provide as much info as possible, in order that we'll be able to make a reliable calculation.

NOTICE:
This service is not free of charge.
Submit needed info and explain in detail what you need and we'll get back to you with our offer/ price in advance. Prices are starting from 20 USD upward per calculation or diagram and depend on motor power and complexity of windings.
Payment is via PayPal using any credit card with no additional transfer fees to you. Note, you don't have to have your own PayPal account.
IMPORTANT NOTICE: MONEY REFUND IS NOT POSSIBLE.
Why?
First of all, the accuracy of calculation or diagram depends on the input data provided by yourself.
The success of the repair depends entirely on your work, expertise, material quality, testing, etc.
Any information obtained by us ( diagrams, calculations, winding details) are just propositions and should be considered and implemented only by professional and fully qualified electrical engineers using their own professional judgment and due regard to health and safety issues.
Using data obtained by us is solely at your own risk.
The onus in on you.
Once you have received our information you paid for (data calculation report or diagram), it is considered you've seen and consumed our service and there is no way to quit and ask for a refund.
Use our service only if you agree with these terms.
DON'T MAKE ANY PURCHASE IF YOU CAN'T ACCEPT THE TERMS ABOVE.

- Our documents will include a copyrighted material intended for your use only.
- Unauthorized use or reproduction, sharing, selling or any kind of publishing, even partial, it's not allowed and will be pursued by the terms of the law.

Pay only if you agree with these terms.

Five-page pdf publication:

Manufacturer's winding data for multi-speed Chinese motors YD series (4/2; 6/4; 8/4, 8/6; 12/6; 6/4/2; 8/4/2; 8/6/4; 12/8/6/4 poles).

The price is 28 USD .

Please only proceed with payment if you agree to the Terms and Conditions outlined above.

PUBLICATION: "Key points to consider when repairing a two-speed electric motor with two sets of windings".

A unique opportunity to prevent one of the most dangerous (unfortunately very common) mistakes when repairing a two-speed, two-winding motor. A minor error can cost you several thousand USD and compromise your reputation. Learn about the problem in advance and gain an advantage over your competition. A comprehensive PDF publication that explains the cause and solution to the problem using a specific example is available at the link below.

Prepare in advance. Don't wait for the problem to occur because then the solution is very expensive and time-consuming.

The price is 95 USD .

Please only proceed with payment if you agree to the Terms and Conditions outlined above.

Here is a link to purchase a single screenshot from our programs

described in the following links:

Link1

Link2

Please carefully review the program description before purchasing to ensure you understand the specific design data you will receive.

The price is $25 USD for a single screenshot.

Please only proceed with payment if you agree to the Terms and Conditions outlined above.

Click to enlarge

PUBLICATION:

How to design a three-phase symmetrical winding in cases where the number of slots per pole per phase (q) is less than 1?

By applying this simple procedure, you will be able to solve numerous diagrams of such kind, for instance, the 30-pole winding in 72 slots (illustrated below).

Keep in mind that such windings are often used in induction motors for cranes, hoists, elevators, as well as in a wide range of applications in permanent magnet motors.

Our new PDF publication, consisting of 7 pages, explains how to design a three-phase two-layer symmetric winding in the case where the slot per pole per phase (q) is less than 1, for example, 24 slots and 10 poles. This simple procedure can be applied to all symmetric windings with q<1 and is the easiest design approach suitable even for both inexperienced designers and winders.

The explanations are detailed, step-by-step.

The price is 66 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

What is the purpose of this winding?

Diagram on the right explained. Click the pic to enlarge.

The price is 39 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 24/6 pole PAM winding-diagram in 54 slots for variable and

constant torque application ( double-layer)

Commonly used in large motors.

Publication in pdf with both connections ( 1Y/2Y and 1D/2Y ) and basic parameters for each of them (winding factor and THD % for each speed in particular). Each phase-winding is shown separately. Winding is balanced at both speeds. Diagrams are suitable not only for winders but also for motor designers because all the main parameters for winding design are included.

NOTE: It is about double-layer, lap winding with pitch 1-8.

The price is 63 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 16/6 pole PAM winding-diagram in 54 slots for variable and

constant torque application ( single-layer)

Commonly used in large motors.

NOTE: It is about single-layer, lap winding with pitch 1-10.

The price is 58 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

One winding for two speeds, both in 1Delta connection

Recently, two-speed motors with a 1D/1D connection are increasingly coming to workshops around the world.
Their main advantage is simple commutation because no external neutral point is needed.
Familiarize yourself with these news in time so that you don't fall behind the competition.
In the publication we offer here you can find complete developed and internal connection diagrams for 8/4 pole motors with 48 and 72 slots as well as all the parameters needed for winding design including the basic winding factor and diff. leakage coefficient.
So it is about one winding for two speeds, both in 1Delta connection.

The price for publication is 48 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

MOTOR EFFICIENCY vs WINDING EFFICIENCY

A seven-page pdf with an example and whole explanation on what the winding efficiency is. It's available to purchase. The price for publication with an particular example is 68 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

e5b555_bdbd95caed3a4e588eaf7325f30ba92c~mv2.png

- WHAT IS A FRACTIONAL-SLOT LAP WINDING?

It is a winding where the number of slots per pole and phase (q = Z/(3xpoles) ) is not an integer, eg. winding for 36 slots and 8 or 10 poles, or windings for 45 slots and 8 poles , etc. The greater the number of slots, the greater the number of such windings.

- IS THERE ONLY ONE WINDING PATTERN OR MORE FOR PARTICULAR SLOT-POLE COMBINATION?

More. When the conditions for balance are satisfied, a fractional-slot lap winding can be laid out in many different patterns all of which are balanced.

- ARE ALL THESE PATTERNS EQUALLY VALUABLE?

Not. They all have different winding factors and differential leakage coefficients.

Bear in mind these two most important parameters of winding quality. Sometimes the differences are not significant and can be ignored, but usually this is not the case and it is necessary to pay attention to the choice of the best winding-pattern, especially in case of large multi-polar machines.

The price for publication with an particular example is 59 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Tips & Tricks No.2

One of most expensive mistakes winders made

This case study analyzes and explains practical example related to very often issue during repair of standard 3-phase motors. This mistake can make the winding unbalanced with all the consequences that unbalance brings. It's about double-layer, random wound windings.

This study can save you thousands of $$$$.

The publication is intended not only for beginners but also for experienced winders in order to prevent unnecessary costs and wasted copper due to repeated repairs and to anyone who wants to learn more.

Publication is in pdf-format (5 pages).

The price is 69 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Tips & Tricks No.1

This case study analyzes and explains practical examples related to different unusual winding arrangements of standard 3-phase motors.

As an example a 3-phase, two layer, 4 pole lap winding with pitch 1-11; 48 slots is used. There is a detailed explanation of the 5 variants of the basic winding along with all the parameters needed to design the winding for each of them ( distribution, pitch and fundamental factor as well as diff. leakage coefficient, figures od MMF stars).

It is intended for anyone involved in motor design/redesign or repair of electric machines, who wants to learn more.

Publication is in pdf format (9 pages).

The price is 68 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The Brief Check of Winding Arrangement for 3-phase, double-layer windings

with Z-slots, 2p-poles and q- slots per poles and phases.

It is a screenshot from an old program.

Could be useful not just for novices.

The price is 18 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Click to enlarge

This is a case study on very tricky 32/8 pole winding; Y/YY; 72 slots which is present in many three-speed crane motors.

The highest speed ( 4 pole) is separate and it is not an issue.

You can purchase all the info you need to design or rewind this kind of 32/8 pole winding: a clear developed internal diagram, external wiring, winding coefficient and harmonic content for both speeds.

The publication is intended for motor designers as well as skilled winders who deal with motor-redesign during repairs.
When you have a diagram like this, it's not hard to make a winding.

The price is 69 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Click to enlarge

Due to numerous requirements, we made an effort and managed to recreate the stator winding diagram (each phase separately) in the case of a two-speed motor with a wound rotor.
It is a very specific HP constant; 60 slots; 8/4 pole winding, very tricky and time consuming to record.

Grouping looks like 2,2,1 repeated.

36 groups of 1 or 2 c/g.
Notice: stator is 8/4 poles, rotor 8 poles.
Our publication now is available to purchase.

Contains all the data for such a motor- design: winding factors for both speeds, analysis of symmetry, calculation of diff. leakage coefficient as a parameter of total harmonic content and separate internal connections for each phase winding . Also, rotor winding diagram is included, but keep in mind there are 7 or 8 different versions of rotor winding for this type of motor and only one, commonly used is included.

The publication is intended for motor designers as well as skilled winders who deal with motor-redesign during repairs.
When you have a diagram like this, it's not hard to make a winding.

The price is 125 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Winding Diagram 3-phase, 90 slots, 12/10 poles, 3Y/3Y connection, PPM winding

This connection (PPM: 3Y / 3Y) has numerous advantages over others (eg PAM: 1D / 2Y or 2Y / 1D).

It's about single winding for two speeds (12 and 10 poles) especially designed for high-rated motors ( even for low-voltage motors) because of 3 parallel paths for each speed.

This is a 10-page pdf- publication containing all the data for such a motor- design: winding factors for both speeds, analysis of symmetry, calculation of diff. leakage coefficient as a parameter of total harmonic content and separate internal connections for each phase winding and each speed.

The publication is intended for motor designers as well as skilled winders who deal with motor-redesign during repairs.
When you have a diagram like this, it's not hard to make a winding.

The price is 78 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

PUBLICATION:

Manufacturer’s Winding Data and Diagrams for 75 motors of Y-series; Single-Speed, Three-Phase, Squirrel-Cage Motors, 380 V; 50 Hz.

(Made in China)

- 2 poles: 0,75 to 160 kW

- 4 poles: 0,55 to 160 kW

- 6 poles: 0,75 to 132 kW

- 8 poles: 2,2 to 110 kW

The price is 28 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Part 1 of collection : "Single-Phase Sinusoidal windings" ( 24 slots, 2 pole; 13 diagrams)

Windings of most single-phase motors are "sinusoidal". They are created according to some specific rules.

Its main characteristic is that the number of turns per coil in the same group could be different. Also the slots may have different sizes.

The purpose of such winding is to reduce the impact of harmful harmonics and facilitate mass production of motors also.

This publication will help to identify almost each 24 slots / 2 pole winding and check the percentage ratio of turns in each coil in group in order to apply a optimal one. It will help also if you want to convert sinusoidal winding to conventional one or vice versa.

Here you can purchase a pdf publication with complete diagrams (13 most applied in practice) with basic parameters for each of them (percentage ratio for each coil in group and winding coefficient for main and aux. winding).

NOTE: It is about concentric, single-layer,double-layer or mixed winding.

The price is 49 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Part 2 of collection : "Single-Phase Sinusoidal windings" ( 17 diagrams)

What is the " Single-Phase Sinusoidal windings"?

Read a brief explanation above (Part1).

Part2 of collection contains 17 diagrams (12 slots, 2 pole - 3 diagrams; 16 slots, 2 pole, 6 diagrams and 24 slots, 4 pole, 8 diagrams).

NOTE: It is about concentric, single-layer,double-layer or mixed winding.

The price is 49 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

Important notice: The price is $ 39 for all those who purchased the first part of the collection.

The 8/6 pole PPM winding-diagram in 72 slots for 2Y+3Y/3Y Connection

(42 groups, double-layer)

Commonly used in high HP motors.

Publication in pdf with developed diagram (see the picture on the right) and basic parameters for each of them (winding factor and THD % for each speed in particular). Diagram is very useful not only for winders but also for motor designers because all the main parameters for winding design are included. Also, the winding itself is very complex and it's likely can not be recorded in easy way. An external wiring is the same as in case of two separate windings.

NOTE: It is about double-layer, lap winding with 42 groups ( double-layer winding with groups of 1, 2 and 3 coils).

The price is 47 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 8/6 pole PAM winding-diagram in 72 slots for variable and

constant torque application (16 groups, double-layer)

Commonly used in large motors.

Publication in pdf with both diagrams ( variable torque and constant torque application) and basic parameters for each of them (winding factor and THD % for each speed in particular). Diagrams are suitable not only for winders but also for motor designers because all the main parameters for winding design are included.

NOTE: It is about double-layer, lap winding with 16 groups ( double-layer winding with groups of 6, 4 and 2 coils).

The price is 47 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 8/6 pole PAM winding-diagram in 72 slots for variable and

constant torque application (22 groups, double-layer)

Commonly used in large motors.

NOTE: It is about double-layer, lap winding with 22groups ( double-layer winding with groups of 6, 5, 2 and 1 coils).

The price is 47 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 8/6 pole PAM winding-diagram in 72 slots for variable and

constant torque application (28 groups, double-layer)

Commonly used in large motors.

NOTE: It is about double-layer, lap winding with 28 groups ( double-layer with groups of 3, 2 and 1 coils).

The price is 47 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE #.

Special 2 pole winding for reducing the 5th and 7th harmonic (54 slots; 2circuits)

This type of winding is often used to reduce the harmful effects of the fifth and seventh harmonics in high HP motors ( low high voltage) . This is a six-page pdf publication with a complete internal diagram as well as a diagram of each phase separately, including harmonic content and basic winding factor.

The price is 29 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The single/double-layer PPM winding 6/4 pole, 36 slots for 3Y/ 3Y
(It is single winding for two speeds. Pay attention on external wiring)

A complete internal connection diagram as well as value of fundamental winding coefficient and differential leakage coefficient for each particular speed .

The price is 28 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE #.

The very simple single-layer PAM winding 6/4 pole, 36 slots for D / YY and Y / YY connections
It's very easy to make it (18 groups) - Suitable for small motors.

Now you have an opportunity to buy a complete internal connection diagram for both connections as well as value of fundamental winding coefficient and differential leakage coefficient for each particular speed .

The price is 29 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The most common PAM winding is 6/4 pole winding in 36 slots for D / YY and Y / YY connections (double-layer)
You've got to know them.

Now you have an opportunity to buy a complete internal connection diagram for both connections as well as results of analysis of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient for each particular speed .

The price is 36 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 8/2 pole PAM winding in 36 slots for variable and constant torque application (24 groups, double-layer, pitch 1-16)

NOTE: It is about double-layer, lap winding with 24 groups ( double-layer with pitch 1-16).

The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 8/2 pole PAM winding in 36 slots for variable and constant torque application (18 groups of 2, double-layer, pitch 1-6)

NOTE: It is about double-layer, lap winding with 18 groups, pitch 1-6.

The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 8/2 pole PAM winding in 36 slots for variable and constant torque application (12 uneven groups of 3)

Publication in pdf with both diagrams ( variable torque and constant torque application) and basic parameters for each of them (winding factor and THD % for each speed in particular).

NOTE: It is about double-layer, concentric winding with12 non uniform groups ( two sorts of groups).

The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

The 8/2 pole PAM winding in 36 slots for variable and constant torque application (12 groups of 3)

Publication in pdf with both diagrams ( variable torque and constant torque application) and basic parameters for each of them (winding factor and THD % for each speed in particular).

NOTE: It is about double-layer, lap winding with12 uniform groups.

The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 8/2 pole PAM winding in 36 slots for variable and constant torque application (12 groups)

Publication in pdf with both diagrams ( variable torque and constant torque application) and basic parameters for each of them (winding coefficient and diff. leakage coefficient for each speed in particular).

NOTE: It is about mixed-layer, concentric winding with12 groups.

The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 8/2 pole PAM winding in 36 slots for variable and constant torque application (24 groups)

NOTE: It is about double-layer winding with 24 groups. .

The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

The 8/6 pole PAM winding in 24 slots for variable and constant torque application (20 groups)

Here you can purchase a pdf publication with both diagrams ( variable torque and constant torque application) and basic parameters for each of them (winding coefficient and diff. leakage coefficient for each speed in particular).

NOTE: It is about double-layer winding with 20 groups with pitch 1-5 .

The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

The 8/6 pole PAM winding in 24 slots for variable and constant torque application (16 groups)

NOTE: It is about double-layer winding with 16 groups with pitch 1-4 .

The price is 37 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

The 8/6 pole PAM winding in 36 slots for variable and constant torque application (24 groups)

The proper record of internal connection sometimes is a hard task.

The motor power could be a relatively high and therefore any mistakes can be very costly.

NOTE: It is about double-layer winding with 24 groups and 1-7 pitch.

The price is 39 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Another 8/6 pole PAM winding in 36 slots for variable and constant

torque application (16 groups)

Here you can purchase a pdf publication with two diagrams ( Y/YY and D/YY) and basic parameters for each of them (winding coefficient and diff. leakage coefficient for each speed in particular).

NOTE: It is about double-layer winding with 16 groups.

The price is 39 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

Another 8/6 pole PAM winding in 36 slots for variable and constant

torque application (26 groups)

Here you can purchase a pdf publication with two diagrams ( Y/YY and D/YY) and basic parameters for each of them (winding coefficient and diff. leakage coefficient for each speed in particular).

NOTE: It is about double-layer winding with 26 groups.

The price is 39 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

The 8/6 pole Single-Layer PAM winding in 36 slots for 1D/2Y connection (14 groups)

The Chinese managed to make this very simple PAM single layer winding.

Here you can purchase a pdf publication with complete diagram ( constant torque application) and basic parameters (winding coefficient and diff. leakage coefficient for each speed in particular).

NOTE: It is about single-layer winding with 14 groups .

The price is 27 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

36slots, 8 & 6 pole, single-layer windin

3 ph, 8 / 6 Pole, 36 Slot, 3Y/3Y Winding with excellent characteristics
Unlike the standard PAM winding , this PPM winding is balanced in both speeds.

There are no circulating currents in parallel circuits at all and differential leakage coefficient is lower in both speeds.

Now you have an opportunity to buy a complete internal connection diagram as well as results of analysis of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient for each particular speed .

The price is 38 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

PUBLICATION: WdgDiagram 72 Slots, 6&4 Poles

A very important winding diagram for each rewind shop.

The publication contains both diagrams for 6/4 poles: constant
torque (1D/2Y) as well as variable-torque (1Y/2Y) connections.
It is about double-layer lap winding with 14 groups of coils.

All the basic winding parameters for design are included: winding

factors and diff. leakage coefficients for both speeds.

Knowledge of this kind of winding will be your significant advantage

compared to other rewind shops.
The price is 59 US Dollars, payment via PayPal.
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

PUBLICATION: Diagram 54 slots,16/ 8 pole, special

It is not hard to design a STANDARD 16/8 Pole winding in 54 slots, but, unfortunately, its parameters are very poor (high diff. leakage, the imbalance between the parallel paths at 8 poles). That's why a special winding connection is developed and commonly used, instead of the standard one. Winding is lap with pitch 1-5.

Its appearance is quite unusual and there are several ways to design it.

Our publication gives the best variant among them. It contains a winding arrangement of whole winding as well as for each phase separately. Also, all the basic winding parameters for design are included: winding factor and diff. leakage coefficient for both speeds.

Knowledge of this kind of winding will be at an advantage compared to other rewind shops.
The price is 36 US Dollars, payment via PayPal.
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

PUBLICATION:

PWS WINDING 36 SLOTS, 2 POLE, Another one of the most complex variants of pws winding, with weird int. connection (see the photos)

It is commonly used in high power refrigerant compressors of Copeland , Bitzer and others.

Generally, the winding of these motors is one of the many types of so-called PWS windings.

It ia about 2 pole PWS connections in 36 slots : winding with 36 coils and specific patern (12 groups of 3 coils). Usually, the pitch ia 1-18; 2-17; 3-16. Connection is specific Delta-connection.

Each of terminal leads 1,2,3,7,8,9 is connected to four groups. At first glance looks like a double-layer winding but it is not.

It's very likely to be misinterpreted.

Here you have the opportunity to purchase our document in pdf containing an internal connection diagram.

Knowledge of this kind of winding will be at an advantage compared to other rewind shops.
The price is 68 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

PUBLICATION:

PWS WINDING 36 SLOTS, 4 POLE, One of the most complex variants of pws winding, with weird int. connection (see the photos)

It is commonly used in high power refrigerant compressors of Copeland (designB), Bitzer and others.

Generally, the winding of these motors is one of the many types of so-called PWS windings.

One of the most elusive 4 pole PWS connections in 36 slots : winding with 36 coils and specific patern. At first glance looks like a double-layer winding but it is not.

It's very likely to be misinterpreted.

Here you have the opportunity to purchase our document in pdf containing an

internal connection diagram for whole winding as well as for each phase separately.

Knowledge of this kind of winding will be at an advantage compared to other rewind shops.
The price is 75 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

PWS WINDING 36 SLOTS, 4 POLE, WITH WINDING DIVIDED IN RATIO: 2/3 + 1/3; (30 COILS)

Due to the specific starting and operation, the winding of the motors of refrigerant compressors could be very unusual.

Generally, the winding of these motors is one of the many types of so-called PWS windings.

One of the most elusive 4 pole PWS connections in 36 slots is mixed ( single-double layer) winding with 30 coils and specific patern. It's very likely to be misinterpreted. Also, the value of turns per coil in full and half slot coil is not always as you can expect.

Here you have the opportunity to purchase our document in pdf containing an

internal connection diagram, winding arrangement and simmetry test for the

case in practice, ie 36 slots, 4 pole with winding divided in two parts (2/3 + 1/3).

This winding is mixed ( single-double layer, with 30 coils) for Y connection.

Knowledge of this kind of winding will be at an advantage compared to other rewind shops.
The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

PWS WINDING 36 SLOTS, 4 POLE, WITH WINDING DIVIDED IN RATIO: 2/3 + 1/3; (24 COILS)

Due to the specific starting and operation, the winding of the motors of refrigerant compressors could be very unusual.

Generally, the winding of these motors is one of the many types of so-called PWS windings.

Here you have the opportunity to purchase our document in pdf containing an

internal connection diagram, winding arrangement and simmetry test for the

case in practice, ie 36 slots, 4 pole with winding divided in two parts (2/3 + 1/3).

This winding is mixed ( single-double layer, with 24 coils) for Y connection.

This kind of PWS is applied by leading manufacturers and sometimes it's hard to record it while taking data.
The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

PWS WINDING 36 SLOTS, 4 POLE, WITH WINDING DIVIDED IN RATIO: 2/3 + 1/3; (24 COILS)

PWS WINDING 36 SLOTS, 4 POLE, WITH WINDING DIVIDED IN RATIO: 1/2 + 1/2; (24 COILS), Y-YY CONNECTION

Notice: The connection is not so obvious as you can think at first glance.

Here you have the opportunity to purchase our document in pdf containing an

internal connection diagram, for the most common case in practice, ie 36 slots, 4 pole with winding divided in two parts (50 % + 50 %).

This winding is mixed ( single-double layer, with 24 coils) for Y connection.

This kind of PWS is applied by leading manufacturers and sometimes it's hard to record it while taking data.
The price is 35 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

PWS WINDING 36 SLOTS, 4 POLE, WITH WINDING DIVIDED IN RATIO: 2/3 + 1/3; (18 COILS)

Due to the specific starting and operation, the winding of the motors of refrigerant compressors could be very unusual.

Generally, the winding of these motors is one of the many types of so-called PWS windings.

Here you have the opportunity to purchase our document in pdf containing an

internal connection diagram, winding arrangement and simmetry test for the

case in practice, ie 36 slots, 4 pole with winding divided in two parts (2/3 + 1/3).

Winding is single-layer ( 18 coils) for Y connection.

This kind of PWS is applied by leading manufacturers and it's hard to record it while taking data.
The price is 35 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

PUBLICATION:

PWS, Dual Voltage, 36 slots, 4 Pole, 24 Coils, 1Wye/2Wye Connection, 9 Leads, τd = 1,14 %; WF = 0,9452

(PWS-Starting at Low Voltage only)

The price is 35 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#.

PUBLICATION:

Internal diagram for 3-phase double-layer, lap, 40 pole winding in 108 slots,

(1 circuit , serial connection, pitch1-3)

- added winding arrangements for each phase-winding separately

- value of basic winding factor and differential leakage coefficient.

The price is 38 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#

PUBLICATION: Internal diagrams for multi-speed crane motors (modified version of constant HP, for 36, 48, 60 and 72 slots).

It is about the 3-speed crane motors with two separate windings.
One of them is specific 4/2 pole winding including an additional winding with quite complex constant HP connection. It's hard to record its internal connection.
These motors are widespread around the globe and they are designed mostly for 36, 48, 60 and 72 slots.
Here you have an opportunity to purchase any of them (please, select the number of slots).
Notice: Publications are related to one winding for two speeds only.

Diagram-crane,36slots,mod,single-layer

(45 USD)#

Diagram-crane, 48 slots,4-2poles,mod ,two-versions, (45 USD)#

Diagram-crane, 60 slots, 8-4pole,mod,double-layer,

55 USD#

Diagram-crane, 72 slots, mod,4-2Pole, 65 USD#

NOTICE: Extra discount for all four internal diagrams (160 USD). Click here

PUBLICATION: 2Pole / 24Slots, 4 Parallels

2 pole winding can be done in more then 2 parallels. This publication shows a complete internal diagram of 2 pole winding in 24 slots with 4 parallels , along with analysis of parallel paths, value of winding factor and differential leakage coefficient. It's very useful for winders as well as for motor designers.

The price is 35 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#

PUBLICATION: 20Pole / 72, Slots Single-Layer Winding

A very common case in 3 speed crane motors is separate winding for low speed 20 Pole , 72 Slots.

(36 groups of 1 coil). It is unusual winding arrangement but with very good parameters. Basic winding factor is 0,9271 and τd = 18,07 %. Publication contains neat internal diagram as well as separate winding arrangement for each phase-winding.

Notice: Publication is related to low speed winding only.

The price is 33 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#

PUBLICATION: 4 Pole Wave Windings (14 Diagrams)

Are you familiar with wave windings?

Here is a chance to purchase a small collection of 14 diagrams of three-phase, 4 pole wave windings (from 18 to 72 slots).

The price is 28 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#

PUBLICATION: Fillable 3 page Winding Data pdf-Form for your Rewind Shop
Suitable for recording and saving your own winding data for 3 phase motors. Winding data and core dimensions could be saved in two ways:
- as a printed copy or
- as a electronic pdf-file.
You can use it :
- to print empty or filled form, according your need and save it as a printed copy,
- to save winding data & core dimensions in electronic pdf form. You can easily rename each pdf in appropriate way and and put it in separate folder and create your own database that way.

NOTICE: You will get what is described.
Ask in advance if something is unclear.
There is no refund after delivery.

The price is 29 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#

PUBLICATION: How to find the beginnings of phase winding

There is a lot of misunderstanding about where the beginnings of each of the three phase are
located, especially in case of single-layer or mixed windings.
Is there a difference between single-layer and two-layer windings, salient and consequent pole
windings?
Is it correct to take the beginnings from the first, third and fifth group or from the first, second and
third group in case of double-layer winding?
Is there only one or several variants that are equally valuable?
Usually this is a matter of routine (do as it was previously done) but sometimes could be quite tricky to find out the most suitable option and avoid costly mistake that could be done.
This tutorial is intended not for beginners only but for all winders, engineers and designers who are
dealing with the three-phase windings of the motors.
Following the instructions you will be able to easily determine the slots from which the phase
windings begin in case of any single-speed, symmetrical three-phase windings, regardless of
whether they are single or double-layered, whether they are so-called "integer" or "fractional-slot",
whether they are salient or consequent pole windings. Also, you'll be able to choose the most
suitable variant that fits you need, avoiding mistakes.

To read more, purchase this 9-page instruction in pdf with clear explanation and diagrams that could save your money.

The price for this is 47 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#

PUBLICATION: Dahlander (two-speed) winding in 3-speed motors (instruction)

Quote:

"Either internal connection or external wiring of Dahlander (two-speed) winding in 3-speed motor can be very tricky and you should pay a special attention to avoid costly mistake.
In a common case 3-speed motor contains two separate windings:
- one of them is two-speed (12/6 pole in our example, constant torque application,D/2Y),
- other one is simple one-speed winding , usually in 1Y connection........."

To read more, purchase this 4-page instruction with clear explanation that could save your money.

The price is 39 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#

PUBLICATION: Internal Diagram for PPM single-layer ( 27 coils) winding 54 slots, 6/4 pole, 3Y-3Y connection

The price is 39 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#

PUBLICATION: Issue with two speeds - two separate windings (example 77/26 kW)

"Two speed motor with two separate windings is easy to repair. What can go wrong in that case. Piece of cake."

This is a frequent comment when such a motor has arrived at the workshop.

Wrong.

This sort of repairs is more complex then one can predict. Despite the fact that both windings are done in a absolutely correct way, their combination could lead to bad outcome and unusable motor.

This publication (with 6 pages) will make it clear where potential problem lie and how to overcome it.

Review it in advance. Do not wait to make a costly mistake.

The price is 39 USD, payment via PayPal with Debit or Credit Card.
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#.

PUBLICATION: 3-phase Winding Diagram 4 Pole at 32 Slots

Sometime, there is a need to redesign a single-phase 4 pole to 3 phase winding.
This useful pdf-publication contains diagram as well as the fundamental winding factors and

differential leakage coefficient .
Notice: this winding has a uniform slot filling and there is no any empty slot.
The price is 39 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#.

PUBLICATION: Winding Diagram 8/4 Pole at 54 Slots

Usually, the two-speed , Dahlander winding is well known, but some of them can be tricky and could lead to unusable motor because of high currents at low speed.
This is the case most often with 8/4 pole motors at 54 slots.
This useful pdf-publication contains both diagrams: for variable and constant torque connection as well as the fundamental winding factors and differential leakage coefficients and will help you to prevent costly mistakes.

The price is 33 USD, payment via PayPal with Debit or Credit Card.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE.#

PUBLICATION: Modifying Three Phase Motors For Single Phase Use

( Capacitance Evaluation for Steinmetz Connection)

This simple procedure is recommended for motors up to 4 kW, even when the rated power, Amps and power-factor are unknown
Estimation of "run" capacitor in no-load-condition
Estimation of "start" capacitor in full-load condition
Extra bonus: free access to our online calculator ( see the picture on the right).
The price is only 17 US Dollars, payment via PayPal with Debit or Credit Card
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS MENTIONED ABOVE#.

3ph to 1ph-estimation.png

3ph to 1ph.png

ADVANCED THREE PHASE 6 POLE WINDING IN 60 SLOTS (single/double-layer)

A complete internal connection diagram of advanced, best winding, as well as results of analysis of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient.

Note: 1Wye connection is preferred.

The price is 45 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

STANDARD THREE PHASE 6 POLE WINDING IN 60 SLOTS (double-layer)

A complete internal connection diagram as well as results of analysis of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient.

Note: 1Wye connection is preferred.

The price is 37 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

STANDARD THREE PHASE 6 POLE WINDING IN 60 SLOTS (single-layer)

Here you have a opportunity to buy a complete internal connection diagram as well as results of analysis

of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient. Note: 1Wye connection is preferred.

The price is 27 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

THE BEST 3 PHASE 12 POLE WINDING IN 48 SLOTS (single/double-layer; 18 groups)

The BEST 12 pole winding in 48 slots is our own solution. Differential leakage coefficient is lowest possible.

Such a winding can be easily used as replacement for other windings in order to get higher efficiency.

Here you have a unique opportunity to buy a complete internal connection diagram as well as results of analysis of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient. 1Wye or 3Wye connection is preferred.

The price is 45 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

THREE PHASE 12 POLE WINDING IN 48 SLOTS (double-layer)

A 12 pole double-layer winding with 48 slots is very commonly used, but still is quite unknown.

Such a winding always is unbalanced. Its appearance is quite unusual and is difficult to properly record it .

In addition, such a winding can not be easily replaced with another winding without the knowing

it's configuration.
Here you have a unique opportunity to buy a complete internal connection diagram as well as results of analysis of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient. 1Wye connection is preferred.

The price is 37 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

THREE PHASE 12 POLE WINDING IN 48 SLOTS (single-layer)

A 12 pole single-layer winding with 48 slots is very commonly used, but still is quite unknown.

Such a winding always is unbalanced. Its appearance is quite unusual and is difficult to properly record it .

In addition, such a winding can not be easily replaced with a double layer winding without the knowing a

single-layer winding.
Here you have a unique opportunity to buy a complete internal connection diagram as well as results of analysis

of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient. 1Wye connection is preferred.

The price is 27 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Three-Phase, Double-Layer, Concentric Winding 72 Slots, 4 poles, 4 Parallel Circuits in a special manner

This pdf publication includes a winding diagram with double-layer concentric winding with 72 slots, 4 poles, 4 circuits.

Number of groups is 24 instead of 12; 4 circuits are designed in a special way.

The price for this pdf publication is 43 US Dollars, payment via PayPal with any credit card . You don't have to have your own PayPal account.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

COMBINED Y-D WINDINGS

Redesign of standard, 24 slots, 2 pole, single-layer windings to combined YD-windings with higher efficiency

THE ADVANTAGES

Combined windings ( semi-six phase windings) have higher fundamental winding factors and produce smaller harmonic contents.

- The higher fundamental winding factor reduces the copper losses in the stator winding by using the same copper and iron mass.

- The smaller harmonic content reduces the torque ripple, the additional rotor losses and the magnetic noise. Furthermore, the starting torque rises up by asynchronous machines. Because of these benefits, the combined winding can be used in very high efficiency machines, in machines with a high power/size ratio or in highspeed drives.

Therefore, the efficiency can be increased without any additional active mass.

This 7-page publication includes an example of conversion from conventional, 24 slots, 2 pole windings to YD combined windings ( both options: serial & parallel connection, internal diagrams and winding data recalculation).

The price for this pdf publication is 29 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

Redesign of standard, 24 slots, 2 pole, single-layer windings to combined YD-windings with higher efficiency

Single-Layer 6/4 Pole PAM Winding in 48 slots ( D/YY and Y/YY Connection)

This combination ( 48 slots & 6/4 poles) could be very tricky for recording.

There are several different versions in our archive, verified in practice ,

with different appearance, winding factor and harmonic content.
One of them, very simple to do (single-layer), with acceptable values

of winding factor and diff. leakage coefficient, is available to purchase.
It includes the both connections: Y/YY and D/YY.

The price for this pdf publication is 38 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Single-Layer 6/4 Pole PAM Winding in 48 slots ( D/YY and Y/YY Connection)n

36 slots, 2 Pole Winding with 2 Circuits, unusual but commonly used in high rated motors

This kind of winding is commonly used in 3 Ph motors rated more then 30 HP (22 kW).

Internal connection is specific and should not be replaced with standard one.

This is some kind of skip interleaved connection, that significantly reduces motor vibrations and increases the lifespan of bearings & motor.

(Attached photo shows an example of similar winding in Siemens, 200 kW motor)

The price for this pdf publication is 29 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 6/4 pole PAM winding in 54 slots for variable and constant torque application (14 groups)

Very useful version of 54/6-4 pol winding.

The proper record of internal connection sometimes is a hard task.

The motor power could be a relatively high and therefore any mistakes can be very costly.

NOTE: It is about double-layer winding with 14 groups and 1-10 pitch.

The price is 39 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

The 6/4 pole PAM winding in 54 slots for variable and constant torque application ( 20 groups)

That case often occurs in practice.

The proper record of internal connection sometimes is a hard task.

The motor power could be a relatively high and therefore any mistakes can be very costly.

NOTE: It is about double-layer winding with 20 groups and 1-11 pitch.

The price is 39 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Single-Layer 6 Pole Windings in 24 Slots ( 3 diagrams)

The three phase, six pole winding in 24 slots could be very tricky for the recording.

There are some different variants of a single-layer windings.

Three of them, commonly used are shown in this publication.

In addition to the diagrams, the publication contains other information about the windings: fundamental winding factors and differential leakage coefficient as well as the comparison and recommendations for proper substitution.

The price is 33 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

20 Blank Templates (your choice ) for USD 20

Select 20 blank templates for $ 20.

Templates are in pdf format , ready for print.

Do not forget to select:

- slots ( from 9 to 99 ),

- layers ( 1 or 2 ),

- start position ( 12, 3, 6, 9 ),

- orientation ( CW or CCW ).

The price is 20 US Dollars, payment via PayPal .

Click this link to download an example.

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.

Templates PDF.pdf

THE BEST 6 POLE WINDING IN 48 SLOTS (single/double-layer)

A 6 pole winding in 48 slots is very commonly used, but is always tricky.

We have managed to create the world-best diagram for 48 slots and 6 pole: single-double layer (30 coils), 1Y connection (preferred), with a remarkably low content of harmful harmonics.
Here you have a unique opportunity to buy a complete internal connection diagram as well as results of analysis

of winding symmetry, harmonic content, value of fundamental winding coefficient and differential leakage coefficient.

The price is 37 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

SINUSOIDAL WINDING 36 SLOTS, 2 POLES

A practical tutorial how to create or convert a commonly used sinusoidal winding for 36 slots, 2 pole.

Our pdf publication contains a:

- the relative turns/coil calculation,

- complete diagram with calculated value of basic winding factor, diff. leakage factor, harmonic content .

- comparison between the sinusoidal and similar standard winding and

- how to convert a sinusoidal to standard winding and vice verse.

The price is 36 US Dollars, payment via PayPal .

NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE#.

ONE WINDING - THREE SPEEDS

A very useful diagram for 36 slots, 8/6/4 pole, double-layer, lap winding with uniform pitch and 2Wye connection.

Our pdf publication contains a complete diagram with calculated value of basic winding factors for each speed.

Winding is easy to do and to connect ( 9 leads). An external wiring is included.

The price is 39 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

THE BEST WINDING FOR 24 SLOTS, 6 POLES

(19. sep. 2013 )

It is about a well-known three phase winding of 24 slots, 6 poles.
Each standard winding evenl so called "advanced winding" has a huge content of harmful

harmonics and consequently a large heat losses.
Here you can buy an unique winding diagram with incredibly low harmonic content .

The winding is easy to make. It is a combined single-double layer, lap winding with equal pitch.

It is suitable in the production of new motors as well as in the repair of defective windings.
You can buy our publication ( in pdf format) with a complete winding diagram .
The price is 37 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

2 POLE WINDING WITH 4 PARALLEL CIRCUITS

Very often there is a need for such a redesign in the practice.

One of the most common cases is a 2-pole winding with 48 slots that should be realized with 4 parallel circuits.

This winding arrangement is not so obvious, at all, and it's very easy to make a mistake.

Since these motors are typically very large, this mistake could be very expensive.

A proper internal diagram can save thousands of dollars.

Here you can buy our unique three page document that contains a complete internal connection for each phase.

The price is 120 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

THREE PHASE 6 POLE WINDING IN 48 SLOTS (SINGLE-LAYER)

A 6 pole single-layer winding with 48 slots is very commonly used, but still is quite unknown.

Such a winding always is unbalanced. Its appearance is quite unusual and is difficult to properly record it .

In addition, such a winding can not be easily replaced with a double layer winding without the knowing a

single-layer winding.
Here you have a unique opportunity to buy a complete internal connection diagram as well as an analysis

of winding symmetry and value of fundamental winding coefficient.

The price is 30 US Dollars, payment via PayPal .
NOTE: PAY ONLY IF YOU ACCEPT THE TERMS ABOVE.#

Buy Now

If this is not something you want , tell us what would you like to buy ?

(Consulting Agency)