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. 28, 2026
Filed:
Apr. 18, 2023
Panasonic Intellectual Property Management Co., Ltd., Kadoma, JP;
Akira Hiwata, Shiga, JP;
Yoshiaki Doyama, Osaka, JP;
Abstract
The refrigerator cycle device includes a control device controlling a compressor including a sealed container constituting a fluidic pathway for a working medium containing ethylene-based fluoroolefin as a refrigerant component, and a compression mechanism and an electric motor inside the sealed container. The control device includes a drive circuit and a control circuit. The drive circuit includes a converter circuit including a first output point outputting a first voltage, a second output point outputting a second voltage lower than the first voltage, and a third output point outputting a third voltage between the first voltage and the second voltage; and an inverter circuit including first to third semiconductor switching element groups connected between the first to third output points and the electric motor. The control circuit performs PWM control on the first to third semiconductor switching element groups to allow the drive circuit to operate the electric motor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile