摘要
电梯门机伺服控制系统的谐波不仅使电机产生机械振动,缩短了电机使用寿命,而且影响系统的正常工作。为了解决电梯门机伺服控制系统中存在的谐波问题,提出了一种采用可变频率载波的正弦脉宽调制(SPWM)方法来抑制谐波的策略,从三相静止坐标系下永磁同步电机(PMSM)的数学模型出发,对电梯门机谐波产生的原因进行了分析,并在Matlab仿真平台上进行了实验验证。实验结果表明,该方法抑制了电梯门机谐波,使电机定子电流波形趋于平滑,提高了电机的稳定性。
The harmonics will make the elevator-door motor generate additional vibration, reduce its use-time, affect the normal operation of system. In order to solve the existence of harmonic problems in the elevator door-machine servo-control system, a harmonic suppression strategy based on the variable frequency carrier wave of sinusoidal pulse width modulation（SPWM） was proposed. The mathematical model of the permanent magnet synchronous motor（PMSM） in the three-phase static coordinate system was introduced and the reasons of the harmonic in the elevator-door motor were analyzed. Experiments were carried out based on the Matlab platform. The experimental results show that the proposed method makes the motor stator current waveform tend to be smooth,and the motorJs stability could also be enhanced.
出处
《机电工程》
CAS
2012年第5期536-540,共5页
Journal of Mechanical & Electrical Engineering
关键词
电梯门机
永磁同步电机
谐波抑制
正弦脉宽调制
elevator door-machine
permanent magnet synchronous motor （PMSM）
harmonic suppression
sinusoidal pulse widthmodulation （SPWM）
