| 摘要 |
PCT No. PCT/KR93/00034 Sec. 371 Date Dec. 28, 1994 Sec. 102(e) Date Dec. 28, 1994 PCT Filed Apr. 29, 1993 PCT Pub. No. WO93/22716 PCT Pub. Date Nov. 11, 1993.A compressor control circuit adapted to a refrigerator comprises a compressor including a brushless DC motor, a power circuit for separating an AC power source from a DC power source to drive the brushless DC motor, a voltage adjustment switching circuit for selecting the voltage of a power source circuit responsive to the load condition, and a motor control circuit including a two phase control circuit for varying the operation speed of the brushless DC motor in response to the temperature of a freezing chamber, an operation control circuit for enabling the on-off operation of the brushless DC motor to be continued according to the on-off operation of a load sensor in the freezing chamber, and an over-load protecting circuit for stopping the brushless DC motor and cutting off the power source under the overload or binding condition for the compressor. The compressor control circuit adjusts the temperature of an evaporator by the continuous variable speed operation of the brushless DC motor, so that the continuous temperature control characteristics of the evaporator are superior, and the freezing and refrigerating chambers of a refrigerator are kept at a constant, accurate temperature without a temperature ripple.
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