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:
Apr. 18, 2023
Filed:
Feb. 27, 2020
Applicant:
Mitsubishi Electric Corporation, Tokyo, JP;
Inventors:
Yuichi Shimizu, Tokyo, JP;
Kazunori Hatakeyama, Tokyo, JP;
Assignee:
Mitsubishi Electric Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 27/08 (2006.01); H02P 6/04 (2016.01); H02P 6/16 (2016.01); H02P 5/46 (2006.01); H02P 5/74 (2006.01);
U.S. Cl.
CPC ...
H02P 27/08 (2013.01); H02P 5/46 (2013.01); H02P 5/74 (2013.01); H02P 6/04 (2013.01); H02P 6/16 (2013.01);
Abstract
A motor drive device that drives motors with one inverter includes a step-out control unit that detects step-out in which the operating frequency of at least one of the motors does not match the inverter output frequency, or the operating frequency of at least one of the motors does not match the operating frequency of another one of the motors, and stops the motors by switching an energization state of the inverter when at least one of the motors is out of step.