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:
Jun. 02, 2015
Filed:
Oct. 22, 2010
Katsuhiko Omae, Chiyoda-ku, JP;
Tsutomu Tominaga, Chiyoda-ku, JP;
Shinichi Ito, Chiyoda-ku, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A control device () controlling an electric motor () is disposed on an axial line of a rotor shaft () of the electric motor (). The control device () includes semiconductor switching devices () forming a three-phase bridge circuit that controls a current of the electric motor () and capacitors () that suppresses a ripple component of a current flowing to the electric motor (). The semiconductor switching devices () and the capacitors () are provided in pairs for respective arms of the three-phase bridge circuit and disposed concentrically. Hence, impedance across the three-phase circuit controlling a current flowing to the electric motor is reduced. Consequently, not only can ripples be absorbed efficiently but also power efficiency of a driving device can be enhanced.