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. 11, 2014
Filed:
May. 06, 2011
Hiromi Murata, Kasugai, JP;
Tsuyoshi Tada, Kasugai, JP;
Masamitsu Hamasaki, Kasugai, JP;
Taiki Yamane, Kasugai, JP;
Hiromi Murata, Kasugai, JP;
Tsuyoshi Tada, Kasugai, JP;
Masamitsu Hamasaki, Kasugai, JP;
Taiki Yamane, Kasugai, JP;
Omron Automotive Electronics Co., Ltd., Aichi, JP;
Abstract
A motor drive device has an inverter circuit, in which at least three sets of a pair of upper and lower arms including a semiconductor switching element on an upper arm and a lower arm is arranged, for supplying voltage to a motor based on ON/OFF operation of each semiconductor switching element by a PWM (Pulse Width Modulation) signal, an inverter drive unit for outputting the PWM signal to each semiconductor switching element of the inverter circuit, a fail safe circuit, arranged between the inverter circuit and the motor, including a semiconductor switching element for shielding the voltage supply from the inverter circuit to the motor for each phase, and a fail safe drive unit for outputting a signal for turning ON/OFF the semiconductor switching element of the fail safe circuit.