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. 28, 1992
Filed:
Dec. 04, 1990
Takehiro Kobayashi, Fuji, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An air conditioning system comprises an inverter that inverts commercial power into a variable-frequency AC and supplies it to a compressor; a DC power circuit for converting the commercial power into DC current; a unit for detecting an analog value of current supplied from the commercial power; and a control unit to control inverted digital data by compensating the digital current data discrepancy due to scattering of the DC control voltage, when there is A/D conversion after an actual power supplied to the inverter has been detected via the detector. The control unit comprises an A/D converter that uses the output of the DC current circuit as the reference for converting the current detection unit output into digital DC data, a controller that compares the allowable current data stored beforehand with the current data converted by the A/D converter and limits the output frequency of current inverted by the inverter so that commercial power current does not exceed the allowable value, a memory to store a compensated current value so that discrepancies in the current data can be compensated for on the basis of DC output discrepancies, and a compensator to compensate the current allowable value data.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile