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:
Nov. 25, 2014
Filed:
Apr. 06, 2011
Eiji Yamada, Owariasahi, JP;
Ryoji Mizutani, Nagoya, JP;
Nobuyuki Matsui, Kasugai, JP;
Takashi Kosaka, Nagoya, JP;
Eiji Yamada, Owariasahi, JP;
Ryoji Mizutani, Nagoya, JP;
Nobuyuki Matsui, Kasugai, JP;
Takashi Kosaka, Nagoya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, JP;
National University Corporation Nagoya Institute of Technology, Nagoya, JP;
Abstract
An electric motor driving device that drives an electric motor including a field winding, a rotor and a stator, wherein the rotor and the stator each form a field pole by passing a field current through the field winding, includes: a power supply device; a converter including a reactor that at least partially serves as the field winding shared with the electric motor, and configured to receive a voltage from the power supply device to carry out voltage conversion between first and second power lines and to pass the field current through the field winding during voltage conversion operation; an inverter configured to convert a direct-current power received from the converter to an alternating-current power for driving the electric motor; and a controller controlling the converter so that a current flows through the field winding in the same direction both during power running and regeneration of the electric motor.