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:
Jan. 06, 2015
Filed:
Sep. 06, 2012
Takashi Sumi, Nishio, JP;
Hiroyuki Sakakibara, Hekinan, JP;
Yuji Hayashi, Kasugai, JP;
Denso Corporation, Kariya, JP;
Abstract
In an electrical power converter, an input circuit performs switching for converting a supply voltage of a power source to alternating-polarity voltage pulses which are applied to the primary winding of a transformer. Each voltage pulse is controlled (e.g., pulse width or amplitude is adjusted) based on a detected value of current flow in the primary winding, where the value has been detected an even-numbered plurality of voltage pulses previously. Any DC component of current flow in the primary winding, caused by manufacturing deviations between switching elements in the input circuit, can thereby be suppressed, and DC flux bias in the transformer thereby suppressed.