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. 26, 2021
Filed:
Oct. 30, 2018
Daikin Industries, Ltd., Osaka, JP;
Yueqiang Zhou, Osaka, JP;
Reiji Kawashima, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A power conversion device includes a power conversion unit that converts power into AC power having a predetermined frequency and voltage through a switching operation of a plurality of switching elements, a DC unit including a capacitor and a reactor, and a controller that controls the switching operation. The capacitor smooths a ripple caused by the switching operation in the power conversion unit. The controller monitors an indicator value correlated with a disturbance that distorts an input current supplied to the power conversion unit, and compensates a manipulated variable of control of the switching operation in the power conversion unit in accordance with at least a frequency component closest to a resonant frequency of the DC unit among a plurality of frequency components. The frequency components are included in variations in the indicator value and correspond to integral multiples of a power source frequency of an AC power source.