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:
Dec. 06, 1994
Filed:
Oct. 14, 1992
Applicant:
Inventor:
Shoji Mochizuki, Shizuoka, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 22 ;
Abstract
An inverter air conditioner controller includes an ac/dc converter for changing ac power into dc power, a dc/ac inverter for changing dc power into ac power having a desired frequency and a desired voltage to drive a compressor, compressor lock presumption unit for preliminarily determining whether a compressor lock occurs, and frequency increasing unit for increasing an operational frequency to a desired value. When it is presumed that compressor lock occurs, the operational frequency is increased. If the operational current value then reaches an overcurrent detection level, a lock protection unit for activates an overcurrent breaker to stop the compressor.