摘要
永磁同步电机的转子位置波动问题会严重地影响到输出扭矩的平滑性,增加了转矩脉动,因此降低转子位置的波动对整车动力平顺性和降低NVH都具有重要意义。本文从理论上分析了线性霍尔在角度转换中产生误差的类型,以及准确的转子位置对系统平稳运行的重要性。在此研究之上,提出了一种内嵌可变参数式的软件低通滤波器,将线性霍尔产生的信号输入该滤波器中,可以有效的抑制正余弦信号在幅值、偏置和正交性上的不一致所产生的角度误差。该算法提高了电机的系统效率,降低转矩脉动,使驾驶人员有更好的驾驶感受。
The rotor position fluctuation of permanent magnet synchronous motor will seriously affect the smoothness of the output torque and increase the torque ripple. Therefore, reducing the amplitude of rotor position fluctuation is crucial to the improvement of automobile smoothness as well as the NVH reduction. In this paper, the types of errors caused by the angular conversion of linear Hall sensor and the importance of accurate rotor position to the smooth operation of the vehicle system were analyzed theoretically. On the basis of these researches, an embedded-variable-parameter LPF was proposed, which could effectively suppress the angle errors caused by the difference between amplitude, offset and orthogonality of sinusoidal signals and those of cosine signals by putting the linear Hall signal into the filter. With the usage of this algorithms, not only will the system efficiency of the electric motors be improved, but the torque pulsation will be reduced, making the driver have a better driving experience.
作者
董万健
张德志
王冬
DONG Wanjian;ZHANG Dezhi;WANG Dong(Shanghai Zhikong Drive Technology Co.,Ltd.,Shanghai 201806,China)
出处
《微电机》
2023年第1期86-90,94,共6页
Micromotors
关键词
永磁同步电机
线性霍尔
角度观测器
低通滤波器
permanent magnet synchronous motor(PMSM)
linear hall
angle observer
low pass filter