The Transactions of the Korean Institute of Electrical Engineers (대한전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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SW-VVVF System for High Efficiency Drive of Induction Motor

삼상 유도전동기의 고효율 운전을 위한 SW-VVVF 시스템에 관한 연구

  • 유철로 (전북대 공대 전기공학과) ;
  • 이공희 (전주공업전문대 전기과) ;
  • 이성룡 (충남전산전문대 전기과)
  • Published : 1989.02.01
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Abstract

This paper describes Sinusoidal Wave-Variable Voltage Variable Fequency (SW-VVVF) system for the high efficiency drive of a 3-phase induction motor. SW-VVVF system consists of a 3-phase 24-pulse converter and a SPWM inverter. The converter with additional 2 tap diode circuits in interphase reactor reduces harmonics in input current. The SPWM inverter consists of an improved PLL system and a V/F controller, which reduces harmonics in output current and performs a high efficiency algorithm by maintaining a constant slip frequency and compensating for the velocity variation of the induction motor with the change of load. Therefore, this system reduces harmonics in input and output currents, and also can drive an induction motor with high efficiency in an economical way. We have proved its utility through experiment.

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