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:
Jul. 14, 2026
Filed:
Sep. 28, 2022
Daikin Industries, Ltd., Osaka, JP;
Yoshitsugu Koyama, Osaka, JP;
Kodai Okuzono, Osaka, JP;
Masaki Kono, Osaka, JP;
Reiji Kawashima, Osaka, JP;
Hirotaka Doi, Osaka, JP;
DAIKIN INDUSTRIES, LTD., Osaka, JP;
Abstract
A power conversion device includes: a power converter using a switching element; and a noise reduction circuit, the noise reduction circuit including: a noise detector configured to detect a common mode noise current or a common mode noise voltage generated in a power line in response to operation of the power converter; an amplifier configured to generate a compensation current based on a detection signal from the noise detector; and an output circuit configured to output the compensation current generated by the amplifier to the power line. A power conversion board carrying the power converter and a canceler board carrying the amplifier are different boards.