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. 26, 1985
Filed:
Oct. 28, 1983
Makoto Takahashi, Tottori, JP;
TDK Co., Ltd., Tokyo, JP;
Abstract
In addition to a conventional rectifier responsive to an input AC voltage, another or second rectifier is employed such that the input AC voltage is first reduced to be applied to the second rectifier. To reduce the input AC voltage a transformer or one or more capacitors may be used. Furthermore, when one or more capacitors are used, the input AC voltage may be once boosted by way of a boosting transformer. A capacitor is connected across output terminals of the second rectifier to be charged with a rectified current therefrom. The output terminals of the first rectifier are respectively connected to output terminals of the first rectifier so that two different DC voltages are combined or superposed one on another. A diode is employed to prevent the capacitor from being charged with a current from the first rectifier. As a result of combination or superposition of two differently rectified voltages, a resultant output DC voltage is obtained where the DC voltage is continuously kept above a predetermined voltage. With this arrangement input AC waveform is improved so that power factor is improved.