Coil grouping Constant Torque Motor
Coil grouping Constant Torque Motor
(OP)
I am rewinding a constant torque motor. The motor is 4 pole and 8 pole. 54 slots. The groups are odd number. 6 groups of 4 and 6 groups of 5. The coils can be put in the stator in order of 454 545 454 545 or 454 454 545 545. Why is the second order the correct one. The groups need to be connected skip pole (1-7) and not adjacent pole (1-4), to get the constant torque motor. Thanks for any help





RE: Coil grouping Constant Torque Motor
Zlatkodo
RE: Coil grouping Constant Torque Motor
I suppose, that it is Dahlander winding for 8/4 poles, 54 slots, for connection delta/2Y. Should be very careful in taking the data for these kind of windings.
You are right: second order is correct ( 454 454 545 545 ). When would you do this by the first order ( 454 545 454 545 ), in higher speed will be unbalance because of different number of coils in two parallel circuits , what you can see from the scheme in the appendix.
If you find the span 1-7, OK. I worked something similar with span 1-8.
Zlatkodo
RE: Coil grouping Constant Torque Motor
BTW, by 1-7, OP means pole jumpers not the pitch. I call them as long jumpers (as against 1-4 short jumpers)
RE: Coil grouping Constant Torque Motor