基于双核CPU的永磁电机转子角度检测研究

Research on Rotor Angle Detection of Permanent Magnet Motor Based on TMS320F28377D

永磁电机转子角度对其控制具有重要影响,目前永磁牵引电机广泛采用旋转变压器进行转子角度和速度信息的检测。基于TMS320F28377D双核CPU结合AD2S1210解码芯片构成转子位置检测系统,并采用角度分段补偿对其误差进行校正,从而为永磁电机控制算法提供了准确的转子角度信息。通过半实物仿真平台对不同转子频率下解码芯片输出的转子角度信息进行了验证。该检测方法具有精度高、抗干扰能力强的特点,满足牵引系统高可靠性和稳定性的要求,具有一定的工程意义。仿真和试验结果表明了该方法的可行性和有效性。

The rotor angle of permanent magnet motor has an important influence on the control of the motor.At present,the resolver is widely used in the permanent magnet traction motor to detect the rotor angle and speed information.Based on the TMS320F28377D dual-core CPU combined with AD2S1210 decoding chip,a rotor position detection system is formed.Angle segment compensation is used for error correction.Thus,the accurate rotor angle information is provided for the permanent magnet motor control algorithm.The rotor angle information output by the decoding chip under different rotor frequencies is verified by the hardware-in-the-loop simulation platform.The detection method has the characteristics of high precision and strong anti-interference ability.It can meet the requirements of high reliability and stability of the traction system.The results of the simulation and experiments show the feasibility and effectiveness of the angle detection method proposed.