Control apparatus and method for actuating an electrically drive

Details Control apparatus and method for actuating an electrically drive Control apparatus and method for actuating an electrically drive

1996-02-06

1997-07-29

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

622284, 622592, 165 804, F25B 4902

Patent

active

056512600

ABSTRACT:
A micro computer 6 reads a manual switch signal Sm from an operating section 15, and sets a target output W0 of an electrically driven compressor 11 based on the manual switch signal Sm. A temperature sensor 20 detects a temperature Ts of a designated component in the compressor control system. Micro computer 6 judges whether the detected temperature Ts is larger than a predetermined upper limit Ta, and generates an output command W equalized to the target output W0 when the temperature Ts is within a predetermined allowable range. On the other hand, when the detected temperature Ts is higher than the upper limit Ta, micro computer 6 sets a modified output W1 smaller than target output W0 by a predetermined correction value .DELTA.W (W1=W0-.DELTA.W>0), and adjusts the output command W to the modified output W1. Then, the compressor 11 is actuated based on thus obtained output command W.

REFERENCES:
patent: 4720981 (1988-01-01), Helt et al.
patent: 5481433 (1996-01-01), Carter
patent: 5493868 (1996-02-01), Kikuiri et al.

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