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:
Mar. 26, 2019
Filed:
Jul. 28, 2016
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Takashi Ogura, Hitachinaka, JP;
Satoru Shigeta, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
If a fault occurs in a buffer unit from which a PWM signal is outputted, an abnormal PWM signal may be outputted from the buffer unit. When a fault occurs in a first buffer unit, a fault detection unit detects a fault in the PWM signal being inputted via a second buffer unit. When the fault in the PWM signal is detected, the fault detection unit outputs a PWM fault signal to an arithmetic unit and the second buffer unit. In response to the input of the PWM fault signal, the second buffer unit sets the output thereof to high impedance and drives the inverter circuit by a protection operation PWM signal to perform protection operation of a motor.