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This is not an EV question, but I hope the Motor forum is the right place for it.
I have a battery powered lawn mower with a 3-phase pm motor of inrunner design. When I turn the mower blade by hand (power off) there are 18 distinct magnetic detents per revolution. I have read that the cogging frequency of this type of motor is the least common multiple of stator slots and rotor poles. I think this means I have a stator with 9 slots and a rotor with 6 poles. Right or totally full of it?
Thanks,
Dan
I have a battery powered lawn mower with a 3-phase pm motor of inrunner design. When I turn the mower blade by hand (power off) there are 18 distinct magnetic detents per revolution. I have read that the cogging frequency of this type of motor is the least common multiple of stator slots and rotor poles. I think this means I have a stator with 9 slots and a rotor with 6 poles. Right or totally full of it?
Thanks,
Dan