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:
Aug. 17, 2021
Filed:
Feb. 19, 2019
Mitsubishi Electric Corporation, Tokyo, JP;
Satoshi Taira, Tokyo, JP;
Yoshitomo Hayashi, Tokyo, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A motor drive device receiving AC power supplied from an AC source and driving a motor includes: a converter circuit converting the AC power into DC power; an inverter circuit converting the DC power into AC power to drive the motor; and a current detector detecting input current flowing on the AC side of the converter circuit. The motor drive device also includes a converter device and an inverter device. The converter device includes a control unit performing control such that input current or input power supplied to the converter circuit does not exceed an upper limit, based on a value detected by the current detector. The inverter device includes a control unit detecting voltage of a DC bus connecting the converter circuit and the inverter circuit, and limiting the output power of the inverter circuit when a detection value of the bus voltage decreases to a set lower limit.