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, 2017
Filed:
Dec. 08, 2015
Mitsubishi Electric Corporation, Tokyo, JP;
Ryo Shinohara, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
The electric motor control device includes: an inverter circuitwhich converts DC power of a DC power supplyinto AC power; and a switching control sectionwhich performs on/off control of a semiconductor switching element composing the inverter circuit. The switching control sectionincludes: a power-supply-side abnormality determination sectionwhich determines whether a power-supply-side abnormal state is established in which regenerative energy from an electric motorcannot be regenerated to the DC power supply; and a switching frequency changeable sectionwhich changes, when the power-supply-side abnormality determination section has determined that the power-supply-side abnormal state has been established, a switching frequency of the semiconductor switching element such that an overall loss, which is a total of loss in the inverter and loss in the electric motor, is increased.