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:
Sep. 24, 2002
Filed:
Dec. 18, 2000
Masao Namai, Nitta-machi, JP;
Naoki Akazawa, Nitta-machi, JP;
Sawafuji Electric Co., Ltd., , JP;
Abstract
A drive apparatus for a vibrating-type compressor includes a DC power source as well as an inverter including switching elements. The inverter is adapted to convert direct time to alternating current through alternating switching of the switching elements. An inverter control unit is provided for controlling the alternating current supplied from the inverter to the vibrating type compressor. A DC power supply comprises a first power supply including a DC/DC converter. A second power supply is provided including an AC/DC converter. A diode OR circuit is connected to the first and second power supplies. A further circuit is provided which, upon detection of a voltage output from the second power supply, operates to stop the output of the first power supply via a DC/DC converter control unit for controlling the DC/DC converter.