Integrated drives as single-phase motor replacement

The aim of this paper is to demonstrate the benefits of squarewave excited integrated drives as a replacement for standard single-phase motors. To overcome the adverse effects of squarewave excitation on induction motor performance, the motor phase number is sufficiently increased. Although the three-phase PWM drive is an industry standard in power electronic drives and offers good motor performance, its higher switching frequency leads to higher inverter losses, making this type of drive less suitable as the basis of an integrated drive. The thermal constraints in an integrated drive require low inverter losses which can be achieved with squarewave excitation. To verify this, the PWM drive has been compared against the squarewave excited multiphase drive