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전동차용 고효율 저주파 동기 PWM을 이용한 관성부하 시험
이광주(LEE Kwang-Joo),정만규(Jeong Man-Kyu),고영철(Ko Young-Cheol),장성영(Jang Sung-Young),방이석(Bang Lee-Seok) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
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 1.65㎹A IGBT VVVF inverter and inertia load equivalent to 160 tons electric cars.