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. 17, 2018
Filed:
Jul. 10, 2017
Subaru Corporation, Tokyo, JP;
SUBARU CORPORATION, Tokyo, JP;
Abstract
A vehicle includes an inverter, a motor, a transmission, and a modulator. The inverter performs pulse width modulation processing at a predetermined carrier frequency. The motor is supplied with electric power from the inverter. The transmission changes the number of revolutions of the motor, and transmits rotary power of the motor to one or more driving wheels. The modulator controls the pulse width modulation processing performed by the inverter, and changes the carrier frequency of the pulse width modulation processing, to offset a change in a frequency of a sideband component out of frequencies of a carrier sound. The carrier sound is generated in the motor or the inverter, or both, accompanying a stepwise change in the number of revolutions of the motor on a condition that the stepwise change is made by the transmission.