Title :
Tripless control methods for general purpose inverters
Author :
Mutoh, Nobuyoshi ; Ueda, Akiteru ; Nando, Kenji ; Ibori, Satoshi
Author_Institution :
Hitachi Ltd., Japan
Abstract :
A control method is proposed that prevents easy tripping of induction motor inverters, even when their load is varied suddenly. A PWM control method is used in which an asynchronized mode is changed to a synchronized mode on the basis of a modulation ratio. A motor torque control approach is used, in which inverter output voltage and frequency are controlled by effective and reactive currents. Experimental results showing that this method can be satisfactorily applied to general-purpose inverters are reported.<>
Keywords :
induction motors; invertors; pulse width modulation; torque control; PWM control; control methods; induction motor; inverters; modulation ratio; motor torque control; reactive currents; tripping; Frequency synchronization; Induction motors; Laboratories; Pulse width modulation; Pulse width modulation inverters; Servomechanisms; Servomotors; Torque control; Variable speed drives; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 1988. PESC '88 Record., 19th Annual IEEE
Conference_Location :
Kyoto, Japan
DOI :
10.1109/PESC.1988.18274
