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:
Dec. 17, 2019
Filed:
Jun. 21, 2017
Daikin Industries, Ltd., Osaka-shi, Osaka, JP;
Reiji Kawashima, Osaka, JP;
DAIKIN INDUSTRIES, LTD., Osaka-Shi, JP;
Abstract
Disclosed is a control device controlling an operation of an active filter which is connected in parallel with a load at an installation point (P) with respect to an AC power source and which supplies a compensation current (Ic) to the installation point (P) so as to compensate for a harmonic component of a load current (Io) flowing through the load. The control device includes: a dq converter converting the load current (Io) into a component of a d-axis current and a component of a q-axis current; a high-pass filter extracting a harmonic component from at least the component of the q-axis current output from the dq converter; a multiplier outputting a result obtained by multiplying a component of a d-axis current output from the high-pass filter by a compensation rate (Kd) as a current command value (id*); and a multiplier outputting a result obtained by multiplying the component of the q-axis current output from the dq converter or a component of a q-axis current output from the high-pass filter by a compensation rate (Kq) as a current command value (iq*). The compensation rate (Kq) of the q-axis current in the multipliers is adjustable.