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:
Sep. 30, 2011
Kazunori Hatakeyama, Tokyo, JP;
Syota Kamiya, Tokyo, JP;
Kenta Yuasa, Tokyo, JP;
Shinya Matsushita, Tokyo, JP;
Shinsaku Kusube, Tokyo, JP;
Tsutomu Makino, Aichi, JP;
Kazunori Hatakeyama, Tokyo, JP;
Syota Kamiya, Tokyo, JP;
Kenta Yuasa, Tokyo, JP;
Shinya Matsushita, Tokyo, JP;
Shinsaku Kusube, Tokyo, JP;
Tsutomu Makino, Aichi, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A heat pump device includes an inverter control unit outputting PWM signals to an inverter; a current detection unit detecting a current value flowing in the inverter and outputting the current value after reducing a current value having a first frequency or higher in detected current value; and a drive-signal stop unit that, when the current value output from the current detection unit is equal to or larger than an interruption level, stops output of PWM signals to the inverter. Particularly, the inverter control unit generates a voltage command value such that the voltage command value becomes a value equal to or larger than a lower limit determined according to the first frequency and generates PWM signals based on generated voltage command value and a carrier signal, thereby causing a voltage output time to the motor to be a predetermined time or longer.