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:
Sep. 15, 2009
Filed:
Apr. 13, 2007
Takahiro Yamada, Nagoya, JP;
Hiroya Tsuji, Yokkaichi, JP;
Takahiro Yamada, Nagoya, JP;
Hiroya Tsuji, Yokkaichi, JP;
Denso Corporation, Kariya, JP;
Abstract
A control system controls, based on a comparison between a waved real current to be supplied to a multiphase rotary electric machine and a hysteresis region established by a waved command signal, a switching timing of a switching element of an inverter to which a direct current voltage is applied to thereby match the waved real current with a waved request current. A determining unit determines whether a workload associated with rotation of the portion of the multiphase rotary electric machine is equal to or greater than a corresponding predetermined value. When it is determined that the workload is equal to or greater than the predetermined value, a changing unit changes the waved command signal from being set to the waved request current so as to determine the switching timing of the switching element based on a positional relation between the waved request current and the changed waved command signal.