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. 21, 2008
Filed:
May. 13, 2005
Mutsunori Matsunaga, Shizuoka, JP;
Kenji Tojo, Moriya, JP;
Yoshikatsu Tomita, Shizuoka, JP;
Susumu Nakayama, Shizuoka, JP;
Syunsuke Yasunori, Shizuoka, JP;
Mutsunori Matsunaga, Shizuoka, JP;
Kenji Tojo, Moriya, JP;
Yoshikatsu Tomita, Shizuoka, JP;
Susumu Nakayama, Shizuoka, JP;
Syunsuke Yasunori, Shizuoka, JP;
Hitachi Air Conditioning Systems Co., Ltd., Tokyo, JP;
Abstract
An apparatus for driving a compressor comprises a compressor having a compression mechanism part for sucking a fluid to compress the same, and an electric motor for driving the compression mechanism part, and an inverter device for driving the electric motor at variable speeds. The electric motor comprises a self-starting type electric motor having a rotor, which comprises a cage conductor and a polarized permanent magnet, and the inverter device comprises a plurality of semiconductor switches for controlling drive frequencies of the electric motor.