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:
Oct. 30, 2018
Filed:
Jun. 19, 2015
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Mitsuhiro Fukuda, Shiga, JP;
Masaki Sumi, Kyoto, JP;
Hiroaki Kase, Shiga, JP;
Shigetomi Tokunaga, Shiga, JP;
Masamitsu Taura, Osaka, JP;
Takayuki Okamoto, Shiga, JP;
PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE, Singapore, SG;
Abstract
A compressor driving device includes: a controller that PWM drives a compressor; an inverter circuit unit that supplies power to an electric motor included in the compressor; a drive circuit that drives the inverter circuit unit according to a control signal; a voltage detector that detects a voltage that is output to the electric motor; and a current detector that detects a current that is output to the electric motor. When a product of a detection value of the voltage detector and a detection value of the current detector is greater than a predetermined comparison value, a duty ratio of the control signal is reduced to cause the input power supplied to the electric motor by the inverter circuit unit to have a predetermined input power level or less.