Winding diagram 6/4 pole, 54 slots Winding diagram 6/4 pole, 54 slots EngRepair (Electrical) (OP) 14 Feb 17 06:16 I stucked with particular version of two speed winding diagram 6/4 pole, 1D/2Y; 54 slots with odd grouping 1,2,5,4,3,2,1,1,5,3 (twice), pitch 1-7. Is there any help? RE: Winding diagram 6/4 pole, 54 slots electricpete (Electrical) 14 Feb 17 22:11 I assume some detective work on existing connection would help. To me it is a puzzler. With 54 slots, coils per group would be be 54/(3*6) = 3 coils per group for 6 pole or 54/(3*4)= 4.5 (fractional slot) coils per group for 4 pole. You've already got a group of 5 coils in a group… that might work for the 4.5 fractional slot winding, but how's it going to fit in a 6-pole 3 coils per group? I don't work in a shop so maybe one of the other guys will have a better idea. ===================================== (2B)+(2B)' ? RE: Winding diagram 6/4 pole, 54 slots electricpete (Electrical) 15 Feb 17 17:06 I'm just thinking out loud... It seems that maybe you could use coil groupings of 3 2 1 3 repeated six times. For the 6-pole configuration, you have 3 / 2-1 / 3 repeated six times for 18 groups of 3 coils each For the 4-pole configuration, you have 3-2 / 1-3 repeated six times for 12 groups alternating 5 and 4 coils each. But that's just a start. Of course it's meaningless unless the connections and lead tapoff points can be arranged to get the correct delta or 2-wye It seems like it might be possible, but after a few minutes I gave up trying to draw it out. Maybe someone else will chime in on this or a better idea. ===================================== (2B)+(2B)' ? RE: Winding diagram 6/4 pole, 54 slots rhatcher (Electrical) 17 Feb 17 06:14 The OP's grouping is incorrect as it results in an a different number of coils per phase (21/15/18). Pete, on the other hand, has come up with grouping that would work (18/18/18), nice job Pete!! However, this is of little help to the OP as a change in grouping requires a change in turns per coil. The OP needs to check the original winding data to find the fault. It is possible to start from scratch and use Pete's grouping if a verification program is used to determine the correct turns per coil (via flux density analysis). RE: Winding diagram 6/4 pole, 54 slots rhatcher (Electrical) 17 Feb 17 06:20 Btw, LPS for Pete. The way to lay out the groups is; ABC 321 332 133 213 321 332 133 213 Coils per phase equals 18/18/18. RE: Winding diagram 6/4 pole, 54 slots rhatcher (Electrical) 17 Feb 17 07:18 Facepalm! I was so intrigued by the question of odd grouping (pretty rare in my experience) that I missed the elephant in the room. It is not possible to have a two speed, single winding motor with 6/4 poles. The pole/speed ratio is fixed at 2:1. 4/2 and 8/4 are possible, 6/4 is not. It would appear the none of the OP's winding data is valid. RE: Winding diagram 6/4 pole, 54 slots rhatcher (Electrical) 17 Feb 17 12:54 The grouping I provided in a previous post is for 8 poles and would probably work for 8/4 pole two speed winding. RE: Winding diagram 6/4 pole, 54 slots zlatkodo (Electrical) 18 Feb 17 05:28 Hi, Pete, I think that 6/4 pole winding, 1D/2Y, 6 leads, can not be done this way. Try to draw it. BTW, question was about particular winding arrangement: 1,2,5,4,3,2,1,1,5,3. We have some incomplete info but it seems that such an arrangement is really existing, used by some manufacturers from China. Unfortunately, I have not tried to recreate this pattern because of two reasons: - this is very demanding and time consuming work even if a suitable software is used, and - there are several alternative, winding diagrams (already tested) and only task is to select one that fits to recorded data (turns per coil, pitch and core/slot dimensions). We have our own very powerful tool that helps to do that. More info on this software you can find on our site. rhacher I can not agree with any of your claims. It is about PAM winding (not Dahlander) and speed ratio could be other then 2/1 , for example 3/2, 4/3, 4/1, 3/1 etc. Also, there is another kind of two speed-one winding motors, so called PPM. http://winding.wixsite.com/design/winding-analysis RE: Winding diagram 6/4 pole, 54 slots waross (Electrical) 18 Feb 17 13:25 Take a look at this thread: PAM Winding Connections. thread237-5237: PAM Winding Connections. Bill -------------------- "Why not the best?" Jimmy Carter RE: Winding diagram 6/4 pole, 54 slots rhatcher (Electrical) 20 Feb 17 20:09 Zlatkodo is correct, the OP's description could apply to a PAM motor. This type of motor can have a speed ratio different than 2:1, they often have strange coil grouping, and the phase sequencing is not A-B-C (repeated). These are very rare in my experience but they do exist. EASA has two connection diagrams available for a 6/4 pole, 54 slot, 1D/2Y PAM motor but they are for connections with different grouping and pitch than the OP's connection. This type of connection is quite complicated but, if the OP has a specific question he should go ahead and ask as someone here may be able to help.