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Hi.

I am trying to re-wind a 3 phase, 400Hz, induction motor. Despite multiple prototype windings, I am unable to achieve the desired RPM of 22000.

Here's the motor's official data.
Input power=650watts
Line current=2.1 Amp
Input voltage=200 Vac - 400Hz - 3 phase
RPM = 22500
Rotor (squirrel cage)=19 slots
Stator=18 slots


Stator Winding scheme used by me:

2-pole, 3-phase, Wire guage = 23
Each phase has 6 coils (35 turns each).
phase-A (pole 1) winding slots= 1-7, 2-8, 3-9.
Phase-A (pole 2) winding= 10-16, 11-17, 12-18.
phase-B (pole 1) winding= 4-10, 5-11, 6-12.
Phase-B (pole 2) winding= 13-1, 14-2, 15-3.
phase-C (pole 1) winding= 7-13, 8-14, 9-15.
Phase-C (pole 2) winding= 16-4, 17-5, 18-6.


Results:
Starting current=4 Amps
Steady current = 1.8 Amps
RPM achieved = 11900.
RPM desired = 22000


Can someone pl suggests how to increase RPM by improving upon the winding scheme? All other factors are fixed, since this is a repair job.

Regards.
FH
 
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