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:
Nov. 11, 2003
Filed:
Mar. 14, 2002
Kuang-Hua Pan, Taoyuan Shien, TW;
Chih-Ming Hsu, Taoyuan Shien, TW;
Delta Electronics, Inc., , TW;
Abstract
An inrush current suppression circuit is installed between a DC voltage and a load with a parallel system capacitor. The inrush current suppression circuit includes a first current limiting circuit which includes a first resistor, a first controlled switch, and a second controlled switch. The inrush current suppression circuit further includes a second current limiting circuit which further includes a second resistor, a third controlled switch, and an energy-storing capacitor. The second current limiting circuit is electrically connected in parallel to the system capacitor, and the first current limiting circuit is electrically connected with the DC voltage and the second current limiting circuit. When the DC voltage is detected, the first controlled switch is conducted. When a voltage of two ends of the load reaches a first threshold value, the second controlled switch is conducted so as to bypass the first resistor. When a voltage of the energy-storing capacitor reaches a second threshold value, the third controlled switch is conducted so as to bypass the second resistor.