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:
Nov. 28, 2017
Filed:
Apr. 28, 2011
Kazunori Hatakeyama, Tokyo, JP;
Takuya Shimomugi, Tokyo, JP;
Shinya Matsushita, Tokyo, JP;
Shinsaku Kusube, Tokyo, JP;
Tsutomu Makino, Aichi, JP;
Kazunori Hatakeyama, Tokyo, JP;
Takuya Shimomugi, Tokyo, JP;
Shinya Matsushita, Tokyo, JP;
Shinsaku Kusube, Tokyo, JP;
Tsutomu Makino, Aichi, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
An object of the present invention is to maintain a heating amount constant when a compressor is heated at the time of shutdown of the compressor, regardless of the influences of production tolerance and environment variations. An inverter control unit causes an inverter to generate a high-frequency AC voltage having a de-energized section in which a voltage applied from the inverter to a motor is zero between a section in which the voltage is positive and a section in which the voltage is negative. At this time, the inverter control unit detects a value of a current flowing to the inverter in a detection section residing from immediately before a start of the de-energized section to immediately after an end of the de-energized section, and causes the inverter to generate a high-frequency AC voltage adjusted according to the detected current value.