基于无位置传感器BLDCM的新能源汽车电子水泵智能控制系统

New Energy Vehicle Electronic Water Pump Intelligent Control System Based on No Position Sensor BLDCM

传统系统发送和接收水泵控制指令和工况信号时,受通信接口干扰信号影响,使得水泵动态响应调节时间较长,超调量较大。提出基于无位置传感器BLDCM的新能源汽车电子水泵智能控制系统。硬件方面,由无位置传感器BLDCM电机、控制器、对外接口,组成系统框架,利用电解电容,吸收通信接口外部干扰信号,利用控制器防护电路和滤波电路,抑制接口内部干扰信号,发送并接收电机工况信号和水泵控制指令;软件方面,采用矢量控制方式,根据BLDCM电机电压和转矩方程,确定电机运行控制量为转子角速度,比例积分调节转子角速度,改变电机转矩,间接控制水泵转矩和角速度。搭建系统测试平台,实验室内进行水泵冷却水加压循环,设置600、800、1 000 r/min电子水泵转速工况。实验结果表明,设计系统相比常规系统,缩短了水泵到达给定转速的调节时间,减小了超调量,改善了水泵动态加速性能。

When the traditional system sends and receives the pump control command and working condition signal,influenced by the communication interface interference signal,the pump dynamic response adjustment time is long and the overshoot is large.The intelligent control system of electronic water pump for new energy vehicles based on position sensor BLDCM is proposed.In terms of hardware,the BLDCM motor,controller and external interface form the system frame,absorb the external interference signal of the communication interface,use the controller protection circuit and filter circuit,suppress the internal interference signal of the interface,and send and receive the motor condition signal and the pump control instruction.In the vector control method,the motor operation control quantity is the rotor angular speed,adjust the rotor angular speed,and change the motor torque and control the pump torque and angular speed indirectly.The system test platform was set up,and the pump cooling water pressure circulation was conducted in the laboratory,setting the speed of 600,800 and 1000 r/min electronic pump.The experimental results showed that compared with the design system,the conventional system shortens the adjustment time for the pump to reach the given speed,reduces the overregulation,and improves the dynamic acceleration performance of the pump.