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. 10, 2017
Filed:
Feb. 03, 2016
Kabushiki Kaisha Yaskawa Denki, Kitakyushu-shi, JP;
Tomohiko Sanada, Kitakyushu, JP;
Koji Higashikawa, Kitakyushu, JP;
Tasuku Isobe, Kitakyushu, JP;
Aiko Higuchi, Kitakyushu, JP;
Fumiaki Ikeda, Kitakyushu, JP;
Kenji Yamada, Kitakyushu, JP;
KABUSHIKI KAISHA YASKAWA DENKI, Kitakyushu-shi, JP;
Abstract
A drive unit includes: an inverter; an electric motor that has a first winding connected to an output part of the inverter and a second winding connected to the first winding; a first semiconductor switch that has a first end connected to the first winding and a second end connected to the second winding; a second semiconductor switch that has a first end and a second end connected to the first winding and the first semiconductor switch; and a snubber circuit that is provided between the second end of the first semiconductor switch and the first end of the second semiconductor switch and has a capacitor and a diode.