A Study on the phase angle detection of power source for PWM converter based on PLL method

PLL기법에 기반한 PWM 컨버터 전원 위상각 검출에 관한 연구

  • Published : 2005.06.01

Abstract

This paper proposes the direct detection method of phase angle for the power source, which is based on the PLL method. The proposed method using a bidirectional photo-coupler is used to directly detect the zero crossing of phase voltage and calculate the angular frequency in the controller based on a M/T algorithm. Through the method, the additional installation space in the traditional method using a potential transformer can be minimized and it can be easy to design. The paper presents straightforward schematic circuits, design and experimental results.

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