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. 28, 2026
Filed:
Apr. 11, 2022
Hitachi, Ltd., Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
An inverter control apparatus includes: a voltage command generating unit that generates a voltage command corresponding to each phase of AC power; a phase difference calculation unit that calculates a voltage difference between the phases of the voltage command; a required phase difference calculation unit that calculates a required phase difference representing a difference of voltages between the phases of the voltage command required to prevent semiconductor switching devices from turning on simultaneously in two phases; a voltage command correction unit that compares the calculated voltage difference and the calculated required phase difference calculated, and corrects the voltage command based on the comparison result; a carrier wave generating unit that generates a carrier wave; and a PWM signal generating unit that compares the voltage command that has been corrected by the voltage command correction unit with the carrier wave.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile