Where do permanent magnet synchronous motors fit in?
A – Recent developments in magnet materials have raised this type of motor to new levels of efficiency featuring high torque to size ratio and moderate cost. Additional features are; inherent dynamic braking, impedance overload protection, and low rotor speed for quiet operation and rapid acceleration. The motor’s limited ability to start and synchronize inertial loads and its sensitivity to parameters of voltage and phasing capacitance should be noted. With a modification of the winding and the proper electronic drive circuitry, this motor type will operate as an excellent stepper motor.
