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:
Sep. 28, 2017
Daikin Industries, Ltd., Osaka-shi, Osaka, JP;
Takurou Ogawa, Osaka, JP;
Eiji Tooyama, Osaka, JP;
Akiko Sera, Osaka, JP;
Morimitsu Sekimoto, Osaka, JP;
DAIKIN INDUSTRIES, LTD., Osaka-Shi, JP;
Abstract
The voltage detection circuit () is a voltage divider circuit including a plurality of resistances (toandto) and detects voltages (Vac, Vac) correlating with a power source voltage (Vin) of the AC power source (). The calculation unit () obtains the across voltage (VL) of the reactor () using detection results (Vac, Vac) of the voltage detection circuit (), and estimates a power source current (Iin) based on the across voltage (VL). The calculation unit () corrects gains of the detection results (Vac, Vac) so that a value correlating with an average value per predetermined time period of the estimated power source current (Iin) matches a value correlating with an average value per the predetermined time period of a current (Iinv) downstream of the capacitor (), and obtains the across voltage (VL) using the detection results (Vac, Vac).