摘要
针对步进电机传统开环控制运行效果欠佳的问题,结合矢量控制算法对两相混合式步进电机进行控制,通过逆变器产生正弦波电流对电机进行驱动。由于步进电机气隙磁场畸变和PWM逆变器的死区效应,使步进电机的运行电流掺杂大量谐波,低速工作时尤为严重。为了改善电机低速运行性能、抑制谐波干扰,结合混合式步进电机矢量控制的电流环进行优化,通过自适应线性神经网络(ADALINE)算法将谐波进行提取与抑制,然后进行电流方向判断,对逆变器的输出进行补偿。实验证明,所提出的补偿策略能够有效抑制两相PWM逆变器的电流谐波,改善波形、降低电机低速运行的转矩脉动。
Aiming at the problem of poor performance of traditional open-loop control of stepper motors,the vector control algo-rithm is combined to control the two-phase hybrid stepper motor,and the sinusoidal current is generated by the inverter to drive the motor.Due to the air gap magnetic field distortion of the stepper motor and the dead-time effect of the PWM inverter,the operating current of the stepper motor is doped with a large number of harmonics,which is especially serious when the motor is working at a low speed.In order to improve the performance of the motor at low speeds and suppress harmonic interference,combined with the op-timization of the current loop of the vector control of the hybrid stepping motor,the harmonics are extracted and suppressed through the adaptive linear neural network(ADALINE)algorithm,and then the current direction is judged to compensate the output of the inverter.The experimental results show that the proposed compensation strategy can effectively suppress the current harmonics of the two-phase PWM inverter,improve the waveform and reduce the torque ripple when the motor is running at low speed.
作者
何坚
林毅鑫
范贤光
许英杰
HE Jian;LIN Yi-xin;FAN Xian-guang;XU Ying-jie(School of Aerospace Engineering,Xiamen University,Fujian Xiamen 361102,China;Fujian Key Laboratory of Universities and Colleges for Transducer Technology,Fujian Xiamen 361102,China)
出处
《机械设计与制造》
北大核心
2024年第3期106-110,共5页
Machinery Design & Manufacture
