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The air conditioning system must follow up the rapid development of pure electric vehicles. According to the characteristics of electric vehicles, design an air conditioning controller system. Design the power supply module for air conditioning controller. Using of position sensors to control the brushless DC motor for compressor. Design an over-current detection circuit. To meet the needs of both the power and the comfort of the car, propose a new control method of controlling the automobile air conditioning compressor motor basing on multiple input variables of the fuzzy control algorithm, in the condition of load vehicle. Results show that this controller has good air conditioning operation.