What is the logical relationship of the air conditioner working process of the electric vehicle air conditioner compressor

　　What is the logical relationship of the air conditioning working process of an electric vehicle air-conditioning compressor? The low-voltage part of the air conditioner is controlled by the VCU. The VCU controls the on and off of the entire air conditioner by controlling the 12V power circuit "air conditioner relay"; transmits command information to the air conditioner controller via the CAN bus to set the target value of the operating temperature; the air conditioner controller feeds back the air conditioner work to the VCU Status information, including the on-off information of the power circuit switch, compressor pressure, and compressor inlet and outlet temperature.

　　The high-voltage power supply of the air-conditioning compressor comes from the on-board DCDC converter. The air-conditioning controller controls the on and off of the contactor on the power circuit through the contactor trigger port, and then controls the working state of the compressor motor. The compressor is integrated with the motor and the motor controller that power it. The space is relatively small, and electromagnetic interference in the space is often the cause of the malfunction of the controlled motor.

　　Compressor motors generally use permanent magnet synchronous motors or permanent magnet brushless DC motors. There is no other reason, small size and simple control. The motor speed can be adjusted in a wide range according to needs. Turn the ignition switch of the electric vehicle to the “ON” position. If the “A/C” switch of the air conditioner is turned on at this time, the air conditioner can start to work.