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针对电动汽车弱磁调速的方法,根据凸极同步电动机的特点,综合考虑同步电机的恒转矩与恒功率运行,基速以下采用最大转矩电流比控制,基速以上采用弱磁控制的控制策略,根据端电压前馈控制法对转速进行检测判断,从而实现扩速的目的,通过搭建仿真模型和试验系统,对永磁同步电动机的调速系统进行研究,仿真和试验结果表明该控制策略实际中易于实现,且具有动态响应快的优势,可以满足电动汽车的高效率运行和更高的实际速度需求,验证了控制策略和实验平台的可行性。
According to the characteristics of salient-pole synchronous motor, considering the constant torque and constant power operation of synchronous motor, the maximum torque-current ratio is controlled below the base speed, and the weak-magnetic control above the base speed Control strategy. According to terminal voltage feed-forward control method, the speed is detected and judged, so as to achieve the purpose of speeding up. By setting up simulation model and test system, the speed control system of permanent magnet synchronous motor is studied. Simulation and test results show that the control The strategy is easy to implement in reality and has the advantage of fast dynamic response to meet the high efficiency operation and higher actual speed requirements of the electric vehicle. The feasibility of the control strategy and the experimental platform is verified.