Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1995-04-10
1997-09-02
Martin, David S.
Electricity: motive power systems
Induction motor systems
Primary circuit control
318811, 363 37, 363132, H02P 534
Patent
active
056636270
ABSTRACT:
A control apparatus for controlling a motor of an air conditioner includes a converter, having switching for improving an input power factor, for converting an AC power to a DC power and an inverter for converting the DC power supplied from the converter to the AC power and supplying to a compressor. The output DC voltage of the converter is detected by a DC voltage detecting circuit. An input alternating current is detected by a current detecting circuit. A microcomputer for controlling the inverter calculates a current command from data stored on the basis of the detected voltage. The detected current is compared with the current command, an ON percentage of a PWM signal to control the switching is obtained, and the PWM signal is generated.
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Fujitsu General Limited
Martin David S.
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