Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 1996.07a
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- Pages.376-378
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- 1996
A Study On The Power Factor Correction Of The Boost Converter Without The Input Current Measurement
입력 전류의 측정이 필요없는 Boost 컨버터의 역률 보정에 관한 연구
- Cho, Sang-Jun (Dept of Control & Instrumentation Engineering. Ajou University) ;
- Lee, Kwang-Won (Dept of Control & Instrumentation Engineering. Ajou University)
- Published : 1996.07.22
Abstract
This paper presents a new PFC control method which replaces a fast line current measurement with a filtered load current measurement. Using the power balance relation between the input and the output of the boost converter. the input current can be described as the function of load current. Thus the PWM signal which effects the switching control of the boost converter is generated using the PFC input voltage, the PFC output voltage and the load current as input variables. By using a filter between the bridge rectifier and a dc-to-dc converter, the input voltage of the dc-to-dc converter is forced to always maintain above zero volt. Then the input current traces a sinewave in phase. The proposed scheme accomplishes a very high power factor and a low harmonic distortion of the line current. The validity of this scheme is demonstrated through simulation.
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