To provide a drive control method for compressor motor and an inverter for driving compressor, capable of avoiding sudden changes in the blow-off temperature of an air conditioner.
A shunt resistor 23 converts phase current in a motor 12 to voltage, and the phase current value is monitored by the voltage value. The motor 12 stops rotating, if the detected phase current value is equal to or higher than a first threshold, based on the maximum rated current value of transistors 21a to 21f. A current value smaller than the first threshold is taken as a second threshold, and the detected phase current value is compared with the second threshold. If the detected phase current value is equal to or higher than the second threshold value, the motor 12 is energized, so that the acceleration of the rotational speed for driving the motor 12 may change, the load of a compressor 11 is reduced by decreasing the rotational speed of the motor 12, the rotation of the motor 12 is controlled, so as to maintain the phase current value smaller than the first threshold.
KUWABARA ICHIRO
YOSHII YUJI
| JPH09135591A | 1997-05-20 | |||
| JPH0739183A | 1995-02-07 | |||
| JPH0382385A | 1991-04-08 |
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