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:
Jan. 27, 2026
Filed:
Nov. 30, 2021
Mitsubishi Electric Corporation, Tokyo, JP;
Tomoyuki Taniguchi, Tokyo, JP;
Kazushige Sawada, Tokyo, JP;
Keisuke Uemura, Tokyo, JP;
Kazuhiro Yamada, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A power converter includes: a first converter circuit; an inverter circuit; a first smoothing unit connected between the first converter circuit and the inverter circuit, the first smoothing unit including a first smoothing capacitor having a breakdown voltage equal to a second voltage threshold and a second smoothing capacitor having a breakdown voltage higher than a first voltage threshold, the first voltage threshold being higher than or equal to a second voltage threshold; an interrupting device connected in series to the first smoothing capacitor; a voltage detector that detects a voltage across the second smoothing capacitor; and a controller that, in a case where the detected voltage is higher than or equal to the second voltage threshold, opens the interrupting device and controls a rotation speed of a motor such that a ripple current through the second smoothing capacitor is less than or equal to a rated ripple current.