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:
Apr. 09, 1996
Filed:
Aug. 20, 1993
Applicant:
Inventors:
Norio Hayashi, Gunma, JP;
Takashi Ogawa, Gunma, JP;
Masaaki Takezawa, Gunma, JP;
Keishiro Igarashi, Gunma, JP;
Assignee:
Sanyo Electric Co., Ltd., Morigushi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318808 ; 318811 ; 318812 ; 363 26 ; 622284 ;
Abstract
A control apparatus for compressor with induction motor includes a microcomputer which evaluates an optimum number of rotations at which an operation efficiency of a compressor becomes a maximum when a frequency of an alternating current electric power applied to an induction motor in accordance with a change of a load. An inverter circuit is controlled by the microcomputer, and therefore, a voltage outputted from the inverter circuit is adjusted such that the induction motor becomes the optimum number of rotations.