Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Improvement of Output Characteristics by Triplen-Harmonics Injection in PWM Inverters

3배수차 고주파 주입에 의한 PWM인버터의 출력특성개선

  • Lee, Sun-Ho (Department of Electrical Engineering Konkuk University) ;
  • Joe, Jee-Won (Department of Electrical Engineering Konkuk University) ;
  • Kim, Ho-Jin (Department of Electrical Engineering Konkuk University) ;
  • Shin, Woo-Seok (Department of Electrical Engineering Konkuk University) ;
  • Choe, Gyu-Ha (Department of Electrical Engineering Konkuk University)
  • Published : 1990.11.17
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Abstract

This paper describes a new method to increase the fundamental output of PWM inverter by adding all triplen-harmonics to sinusoidal reference wave. As a result, the amplitude of the fundamental component is increased upto 21 percent compared with the conventional SPWM method, and hence the conversion efficiency of dc link is higher. Also as the commutation number of the inverter is decreased to two-thirds, the heating of the switch devices is reduced. In addition random carrier modulation is adopted to lower the acoustic noise at given frequency modulation index.

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