전동차용 고효율 저주파 동기 PWM을 이용한 관성부하 시험

A Inertia Load Test using a Low Frequency Synchronous PWM Technique of high efficiency for Electric car.

This paper presents a high efficiency low switching PWM technique for the propulsion system of Electric car. In order to achieve the continuous voltage control to six-step and a low harmonics with low switching frequency under 500㎐, the synchronous technique is combined with a space vector overmodulation and implemented by using DSP. Improved performance and a validation of proposed method is shown by the experimental results using a 1.65MVA IGBT VVVF inverter and inertia load equivalent to 160 tons electric cars.