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:
Dec. 17, 2024
Filed:
Jan. 22, 2021
Hitachi Astemo, Ltd., Hitachinaka, JP;
Toshiyuki Ajima, Tokyo, JP;
Takafumi Hara, Tokyo, JP;
Akihiro Ashida, Hitachinaka, JP;
Hirokazu Matsui, Hitachinaka, JP;
Kiyoshi Kuroda, Hitachinaka, JP;
Hitachi Astemo, Ltd., Ibaraki, JP;
Abstract
An inverter control deviceincludes a PWM control unitthat generates a PWM pulse for controlling an inverter, and a pulse edge control unitthat performs pulse edge control for correcting (shifting) a phase of a pulse edge of the PWM pulse generated by the PWM control unit. The PWM control unitgenerates a PWM pulse by using a modulation rate based on a voltage command (Vd*, Vq*). The pulse edge control unitcorrects the PWM pulse so that a phase difference between a zero cross point where the modulation wave changes across 0 and a pulse edge of the PWM pulse falls within a predetermined range.