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:
Dec. 27, 2005
Filed:
Feb. 10, 2003
Masaaki Simada, Saitama, JP;
Tomoyasu Yamada, Saitama, JP;
Masaaki Simada, Saitama, JP;
Tomoyasu Yamada, Saitama, JP;
Sanken Electric Co., Ltd., Saitama, JP;
Abstract
When an AC power source () is turned on, energy is accumulated in a backup capacitor () by an energy supply circuit (). An internal power source () supplies the energy accumulated in the capacitor () to a control unit (). Thus, a power factor improvement circuit (-) operates. When the power factor improvement circuit (-) operates to output a predetermined voltage, an output voltage detection circuit () detects the voltage, and switches the internal power source () on. The turned on internal power source () supplies the energy in the capacitor () to a control unit () to operate a DC/DC conversion circuit (). In this way, by operating the DC/DC conversion circuit () after operating the power factor improvement circuit (-), the capacity of the capacitor () can be reduced.