We've already updated our previous program that handled most unbalanced, double-layer, three-phase windings.
The new version of the program is designed for ALL three-phase windings, which are inherently unbalanced by default. As far as we know, there's no such program available yet. Correct us if we're wrong.
The program is web-based but also suitable for mobile app development.
Contact us if you're interested in purchasing the program for your web site or to make your own mobile app.
It's useful for designing or repairing electric machines. The program itself is very user-friendly for both professionals and beginners. Here are just a couple of explanations using the example of designing an 'exotic' 18-pole winding in 87 slots. To get started, watch the screenshot below.
Here's a closer look at what the program offers.
First and perhaps most importantly, it provides the slot arrangement specifically for each phase (see image below). This layout allows you to design all the coils of each phase winding individually. Take a look at the first (black) line.
(1, 2), (6, 7), (11, 12), (16), (21), (26), (30, 31),(35, 36), (40, 41), (45, 46), (50), (55), (59, 60), (64, 65), (69, 70), (74, 75), (79),(84)
Watch the video below. Find this in video and click to enlarge:
The numbers in the sequence represent the slot numbers where the left coil-side of all coils in phase A are located. Consecutive numbers that differ by 1 form one pole-phase group.
In this case, each of the 18 groups has 1 or 2 coils. As you can see, this indeed results in 18 groups per phase, consisting of 11 groups with 2 coils and 7 groups with 1 coil.
The same process needs to be repeated for Phase B slots (red sequence) and Phase C slots (blue sequence).
This allows you to design the winding arrangement for each phase individually.
For simplicity, the groupings for each phase and the entire winding are also shown in the image below.
It's important to note that in this case, the Total Number of Repetitions (for Slots, Phase Grouping, and Whole Winding Grouping) is 1. This means this winding has only one unique section that doesn't repeat.
Consequently, this winding can only be connected in series. Parallel circuits are not possible.
If the Total Number of Repetitions is greater than 1, the repeating section needs to be replicated the total number of times. In that scenario, parallel circuits become possible.
Internal connections are handled as indicated by the program: end-to-end, start-to-start, or adjacent pole (short jumper).
The connection diagram starts from the beginning of the phase towards the end, as recommended by the program: Power Supply to the beginnings of groups 1, 3, and 5.
The program also suggests the most commonly used coil-pitch in practice: Commonly used Coil-Pitch is 1 to 5, although it can be different in case of double-layer winding.
Simple, isn't it?
It's easy to be a motor designer even for such complex windings!
Links:
Whether the particular slot/pole combination is unbalanced? Free access to quick check at https://winding.wixsite.com/design/for-customers
If you want to purchase a screenshot from program for particular balanced or unbalanced winding go to: https://winding.wixsite.com/design/buy-now
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