基于PID控制的电动汽车充电系统智能断电设计

Intelligent Power-off Design for Electric Vehicle Charging System Based on PID Control

通过对电动汽车充电系统的智能断电设计可以为充电汽车提供安全保护的同时还能节约电力能源,传统的充电断电设计采用互感耦合I/O中断控制方法,当充电线圈电磁分布出现脉冲干扰时,断电实时性不好。提出一种基于PID控制的电动汽车充电系统智能断电控制算法并进行系统硬件设计。首先进行了电动汽车的充电系统电能传输原理和结构分析,电动汽车的充电磁共振模式采用平面线圈构建,通过两个线圈进行电磁感耦合,得到电动汽车的电磁场3D分布图。在此基础上进行了断电控制算法的PID神经网络算法设计,硬件电路设计主要包括了电动车断电的传感器模块设计、动态增益控制模块设计、复位电路设计、PCI总线设计和A/D转换电路设计等,实现硬件电路设计。系统测试结果表明,采用该系统进行电动汽车充电系统的智能断电控制,初级侧电流和逆变器的输出电压在轴向偏移下具有较好的负载过载反应能力,断电控制准确性较好,性能优越。

The intelligent power-off design of electric vehicle （EV） charging system can provide the safety pro- tection of the charging ear and save power energy. The traditional design adopts the mutual inductance cou- pling I/O power^off control method, but has poor real-time power-off control performance in the event of pulse interference in charging coil electromagnetic distribution. This paper proposes an intelligent power-off control algorithm for EV charging system based on PID control and conducts the hardware design of the system. First- ly, the electric energy transmission principle and structure analysis of the EV charging system are carried out. The magnetic resonance mode of EV charging is constructed by using the planar coil. The electromagnetic 3D distribution of the EV is obtained by using two coils. Thereupon, the power control algorithm of PID neural network algorithm is designed, and hardware circuit design mainly includes the sensor module design of EV power, dynamic gain control module design, reset circuit design, PCI bus design and A/D converter circuit de- sign. System test results show that this intelligent powe-off control of EV charging system is superior in con- trol accuracy and performance and the primary side current and the output voltage of the inverter has good o- verload response capability.