Hi,
I have a ac mains capacitor run induction motor wich I am going to rewind to be used with a lower voltage higher frequency inverter.
It has 16 slots in the stator wich makes it difficult to wind for 3 phase, it was wound with 2 pole pairs before wich I aim to folow. however I have 4pwm outputs so I thinking about 4 phase, makes it realy easy to wind, where each phase peak power would be 22.5' from the next, ie not like some stepper motors where the the are 4 windings but only 2 seperate or real phases as the other 2 are opposites.
however its difficult to work out the drive, as at a first look the 4 phases dont always add upto zero unlike 3 phase.
theoretically this would mean the center conection would need to be held at a constant voltage, and the equivalent of delta configuration (quad ?) would not work.
is there an easy way round this? or how would trying to work out a 3 phase winding pattern to fit onto a 16 slot rotor work out ? best shot at it so far I came up with was also not balanced, but trial and error aproach makes it a bit tedious.
also Im looking for constant power drive, I could of course use any drive waveform to acheive this.
any one have any ideas ?
would be easier if I could find a 3phs ac motor wich could run upto 30kprm from low voltage ~24v drive,