• Title/Summary/Keyword: 3차지역통과 LC 필터를 가진 전브리지 인버터

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A Study on the Speed Control System of a 3 phase Induction Motor driven by the Full Bridge Inverter with a Low Pass LC Filter (저역통과 LC필터를 가진 전브리지형 인버터로 구동되는 3상유동전동기의 속도제어 시스템에 관한 연구)

  • 박진길
    • Journal of Advanced Marine Engineering and Technology
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    • v.22 no.4
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    • pp.538-550
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    • 1998

  • The variable frequency and variable voltage AC source made by a conventional inverter which is composed of power semi-conductors includes much noises in sine wave due to high frequency switching of DC source. In this paper the 3rd low pass LC filter for a variable speed 3 phase induction motor driven by a full bridge inverter is introduced to solve the EMI problem by serious noise current. The utility of a modified 3rd order Butterworth LC filter is confirmed through FFT analysis of sine waves and noiseless ACsource can be obtained by the proposed LC filter. The speed of a 3 phase induction motor driven by a full bridge inverter with a LC filter is satisfactorily controlled by a digital PID controller under the condition of stepwise load and setpoint changes.

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