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. 02, 2022
Filed:
Aug. 28, 2019
Sumitomo Electric Industries, Ltd., Osaka, JP;
Naoki Ayai, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
In a High Efficient and Reliable Inverter Concept power conversion device, control is performed with one cycle divided into four periods, wherein in a first period when the signs of an AC voltage and an AC current are both positive, first and fourth switches perform switching operation, second and third switches are opened, and a sixth switch is closed; in a second period when the signs are positive and negative, a current is passed through freewheeling diodes when a fifth switch is opened while the fifth switch performs switching operation; in a third period when both signs are negative, the second and third switches perform switching operation, the first and fourth switches are opened, and the fifth switch is closed; and in a fourth period when the signs are negative and positive, a current is passed through freewheeling diodes when the sixth switch is opened while the sixth switch performs switching operation.