Title :
High efficiency, unity power factor VVVF drive system of an induction motor
Author :
Morimoto, Masayuki ; Sumito, Kiyotaka ; Sato, Shinji ; Oshitani, Katsumi ; Ishida, Muneaki ; Okuma, Shigeru
Author_Institution :
Mitsubishi Heavy Ind. Ltd., Yokohama, Japan
fDate :
7/1/1991 12:00:00 AM
Abstract :
A high-efficiency, unity-power-factor VVVF (variable voltage, variable frequency) drive scheme for an induction motor is presented. A unity-power-factor PWM (pulsewidth modulated) converter regulates DC voltage. An inverter circuit with the magnetic flux control PWM method generates VVVF PWM waveforms. The modulation factor of the inverter PWM control with controllable DC link DC voltage is studied. As a result, the distortion factor and the switching frequency are reduced by over-modulation with low DC link voltage. A high-efficiency and unity-power-factor VVVF induction motor drive has been achieved using the control strategy
Keywords :
electric drives; induction motors; magnetic variables control; power factor; PWM converter; VVVF drive system; controllable DC link DC voltage; distortion factor; high-efficiency; induction motor; magnetic flux control; modulation factor; switching frequency; unity power factor; variable frequency; variable voltage; Frequency; Induction motors; Magnetic circuits; Magnetic flux; Magnetic variables control; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Reactive power; Voltage control;
Journal_Title :
Power Electronics, IEEE Transactions on
