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. 16, 2008
Filed:
Jul. 12, 2006
Mitsuyuki Kiuchi, Nara, JP;
Sadayuki Tamae, Osaka, JP;
Hisashi Hagiwara, Osaka, JP;
Masahiro Suzuki, Osaka, JP;
Shuichi Kojima, Osaka, JP;
Mitsuyuki Kiuchi, Nara, JP;
Sadayuki Tamae, Osaka, JP;
Hisashi Hagiwara, Osaka, JP;
Masahiro Suzuki, Osaka, JP;
Shuichi Kojima, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A motor drive unit comprises a DC power source, a plurality of inverter circuits for converting the a power of this DC power source to an AC power, current detectors for detecting an output current of at least one of those plurality of inverter circuits and a controller for performing PWM control of those plurality of inverter circuits. This controller is constructed in a way to synchronize a PWM period of the plurality of inverter circuits, so as to drive a plurality of motors at once by means of those plurality of inverter circuits respectively.