Invention Grant
US08102165B2 Means of eliminating electrolytic capacitor as the energy storage component in the single phase AD/DC two-stage converter
有权
消除电解电容器作为单相AD / DC两级转换器的储能部件的手段
- Patent Title: Means of eliminating electrolytic capacitor as the energy storage component in the single phase AD/DC two-stage converter
- Patent Title (中): 消除电解电容器作为单相AD / DC两级转换器的储能部件的手段
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Application No.: US12496025Application Date: 2009-07-01
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Publication No.: US08102165B2Publication Date: 2012-01-24
- Inventor: Linlin Gu , Ming Xu , Xinbo Ruan , Kai Yao
- Applicant: Linlin Gu , Ming Xu , Xinbo Ruan , Kai Yao
- Applicant Address: TW Taoyuan Hsien CN Nanjing
- Assignee: FSP Technology Inc.,Nanjing University of Aeronautics and Astronautics
- Current Assignee: FSP Technology Inc.,Nanjing University of Aeronautics and Astronautics
- Current Assignee Address: TW Taoyuan Hsien CN Nanjing
- Agency: Muncy, Geissler, Olds & Lowe, PLLC
- Priority: TW97127057A 20080717; TW97127239A 20080718
- Main IPC: G05F1/40
- IPC: G05F1/40 ; G05F1/10 ; G05F5/00
Abstract:
A power factor correction (PFC) circuit includes an inductor, a diode, a storage capacitor, a switch and a control unit. The input power has a voltage fluctuation V1. The storage component absorbs a first voltage fluctuation and a switch regulation circuit absorbs a second voltage fluctuation V2. Thus output voltage from the PFC circuit is not a conventional constant voltage but a voltage of a great ripple. The PFC circuit further has a harmonic regulation unit. The harmonic regulation unit generates a voltage signal containing 3rd harmonic. The control unit receives a feedback signal and the voltage signal containing 3rd harmonic to generate a reference to the inductor current. Therefore, the inductor current contains 3rd harmonic. Thus power fluctuation absorbed and released by the capacitor is smaller. As a result energy storage capacitance can be reduced significantly.
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