摘要
该文通过对三相无刷直流电机的本身特点进行分析,并结合目前最新的磁场定向控制技术,摒弃传统的开环方波控制和正弦波方式,旨在提高电机的控制精度的同时减小电机的功耗,并降低电机运行过程中的转矩脉动。通过无刷直流电机三相电流的空间矢量解耦操作,将电机的电流解耦为直轴和交轴电流,并通过电流PI闭环控制分别对这两个电流进行合理控制,达到提高控制精度和节省功耗的效果。除此之外,通过空间矢量脉宽调制技术将三相控制电流转换为正弦波叠加三次谐波的驼峰控制电流,在继承了方波控制加速过程迅速的同时又不失正弦波控制的平稳的特点。
In this paper,in order to improve the control precision of the motor power,and the torque ripple of the motor during operation,I＇m through the analysis of three-phase brushless DC motor characteristics,combine with the latest field oriented control technology,and abandon the traditional open-loop control of square wave and sine wave.in order to decouple the current,we need to do CLARK and PARK coordinate transformation.Beside,through space vector pulse width modulation technology,we will obtain a controlling waveform like hump,which inherite the characteristic of square wave control about speeding up quickly and the characteristic of square wave control about stable operation process.
出处
《电子质量》
2017年第12期97-102,共6页
Electronics Quality
