Electric power conversion systems – Current conversion – With voltage multiplication means
Patent
1998-07-13
2000-10-31
Han, Jessica
Electric power conversion systems
Current conversion
With voltage multiplication means
363 44, H02M 706
Patent
active
061412309
ABSTRACT:
A valley-fill power factor correction circuit includes a rectifying circuit connected to a charge storage circuit. There is a voltage doubler circuit disposed between the rectifying circuit and the charge storage circuit. The voltage doubler circuit performs the function of filling the normally truncated input current waveform. As arranged, the input current waveform can be substantially maintained with less distortion resulting in a Fourier transform in compliance with the IEC specifications. The valley-fill circuit of the invention is capable of achieving a high power factor.
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K. Kit Sum, "Improved Valley-Fill Passive Power Factor Correction Current Shaper Approaches IEC Specification Limits," PCIM, Feb. 1998, pp. 42-51.
K. Kit Sum, "Improved Valley-Fill Passive Current Shaper," Official Proceedings of the Twelfth International Conference, Sep. 6-12, 1997, pp. 43-50.
Spangler et al., "Electronic Fluorescent Ballast Using a Power Factor Correction Techniques for Loads Greater than 300 Watts," Sixth Annual Applied Power Electronics Conference and Exposition, Mar. 10-15, 1991, pp. 393-399.
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Broadband Telcom Power, Inc.
Han Jessica
Tam Kam T.
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