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:
Jun. 25, 2024
Filed:
May. 27, 2021
Mitsubishi Electric Corporation, Tokyo, JP;
Kotaro Nakano, Tokyo, JP;
Yoshihiko Kimpara, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
To provide a controller for AC rotary machine and a motor vehicle which can solve the countermeasure against heat of the inverter, and the generation of sound or electric resonance, at the same time. A controller for AC rotary machine turns on and off a plurality of switching devices which the inverter has at PWM frequency, based on the n-phase voltage command values; detects the temperature of the inverter; changes the PWM frequency based on the detected temperature of the inverter; and changes the PWM frequency out of range of the avoidance frequency band, when the PWM frequency after change is within the range of the avoidance frequency band.