Patent ID: 7201010

Claim:
A compressor control system for an air conditioner of a vehicle, the vehicle includes: a driving electric motor for driving the vehicle; a main battery for supplying electric power of a high voltage to the driving electric motor; and a driving electronic control unit which has at least one of a function for controlling operation of an electric actuator driven when being applied with the high voltage of the main battery, a function for controlling a drive-power switching of the vehicle between the driving electric motor and an engine of the vehicle and a function for controlling a charge and a discharge of the main battery, the compressor control system comprising: a compressor which is provided in a refrigerant cycle of the air conditioner for performing air-conditioning in a vehicle compartment; a compressor electric motor for driving the compressor, wherein the compressor electric motor has a rotation speed that is controlled by the driving electronic control unit; an air-conditioning electronic control unit to which an air-conditioning signal relevant to the air-conditioning is inputted, and a compressor inverter which converts the high voltage from a direct current source to AC voltage with an adjusted frequency or voltage value, and applies the adjusted AC voltage to the compressor electric motor; wherein the air-conditioning electronic control unit controls operation of the air conditioner based on the air-conditioning signal; the air-conditioning electronic control unit is provided to communicate with the driving electronic control unit; the driving electronic control unit controls the rotation speed of the compressor electric motor through the compressor inverter; the air-conditioning electronic control unit calculates a target rotation speed of the compressor electric motor based on the air-conditioning signal, and outputs the calculated target rotation speed to the driving electronic control unit; and the driving electronic control unit is provided with an output circuit that is capable of converting the target rotation speed input from the air-conditioning electronic control unit to a driving signal for processing the compressor inverter, and output the driving signal converted via the output circuit to the compressor inverter.