Force Commutated Circuit for Driving The Load Commutated Current Source Inverter

부하전류식(負荷轉流式) 전류형(電流型) 인버터를 구동(驅動)하기 위한 강제전류회로(强制轉流回路)

When induction motor is driven with a load commutated inverter, the output part of the inverter must be capacitive. But, in order to be a good load commutation at the low speed range, very large capacitor or force commutated circuit must be used regarding the capacity of motor. This paper proposed the force commutated circuit for driving the motor in case of the installation of capacitor which can be capable of load commutation at the rating speed. The force commutated circuit is operated by the LC resonant circuit, auxiliary source and SCR, and also composed of the commutation circuit which control the interval of the inverse voltage across the inverter.