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:
Oct. 19, 2021
Filed:
Nov. 18, 2016
Mitsubishi Electric Corporation, Tokyo, JP;
Takumi Hoshi, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
An inverter control signal in each phase is input into a UVW-phase inverter circuit and an XYW-phase inverter circuit for controlling a motor including a plurality of winding groups in a UVW-phase and an XYZ-phase. The inverter control signal is generated as a pulse signal having a period depending on a rotation speed of the motor based on a current in each phase of the motor. An abnormality detection circuit has a function of detecting a pulse period of the inverter control signal in each phase and is configured to detect whether an abnormality occurs or not in motor control, depending on whether a predetermined large-small relation according to an arrangement order of the UVW-phase and the XYZ-phase is established or not in the pulse period of the inverter control signal in each phase during at least one of an acceleration state or a deceleration state of the motor.