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:
Apr. 15, 2003
Filed:
Jun. 25, 2001
Sumikazu Shamoto, Nagoya, JP;
Shoichi Sasaki, Okazaki, JP;
Eiji Sato, Toyota, JP;
Masayuki Komatsu, Aichi-gun, JP;
Kazunari Moriya, Aichi, JP;
Hiroki Ohtani, Aichi, JP;
Yukio Inaguma, Aichi, JP;
Toyoda Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
When the absolute values of the negative voltage V− and the positive voltage V+ of a rectangular wave to be applied to the three phase coils of the motor driven using a rectangular-waved voltage are different, time T and time T for the rectangular wave are adjusted such that the area A representing the absolute value of a time integration value of the negative voltage V− and the area B representing the absolute value of a time integration value of the positive voltage V+ becomes equal to each other. With this adjustment, the average voltage of the rectangular wave becomes of value 0, so that a DC component current is prevented from flowing into the three phase coils of the motor.