The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2005
Filed:
May. 09, 2003
Chin-chang Wu, Kaohsiung, TW;
Hurng-liang Chou, Kaohsiung, TW;
Nan-ying Shen, Kaohsiung, TW;
Yao-jen Chang, Kaohsiung, TW;
Chin-Chang Wu, Kaohsiung, TW;
Hurng-Liang Chou, Kaohsiung, TW;
Nan-Ying Shen, Kaohsiung, TW;
Yao-Jen Chang, Kaohsiung, TW;
UIS Abler Electronics Co., Ltd., Hsintien, TW;
Abstract
A control method for the parallel-connected power converters includes a control circuit comprising a voltage feedback circuit and a current feed-forward circuit. The voltage feedback circuit, consisting of a voltage regulated control circuit and a waveform control circuit, is used to control the power converter's output voltage with constant amplitude and low total harmonic distortion. By adjusting the gain of waveform control circuit, it can regulate the current distribution among the parallel-connected power converters. The current feed-forward circuit separates the power converter's output current into the fundamental component and the harmonic component, and amplifies them by different gain. The amplified fundamental component acts as a fundamental resistor to suppress the circulating current among the parallel-connected power converters, and the amplified harmonic component acts as a harmonic damper for preventing from high frequency oscillation generated by the L-C filter.