无刷直流电机无直轴电枢反应的非正弦转子磁场定向矢量控制技术  

Non-Sinusoidal Rotor Field Oriented Vector Control Technology Without d-Axis Armature Reaction in Brushless DC Motor

作　　者：李珍国[1] 孙启航 王鹏磊 崔屹峰 Li Zhenguo;Sun Qihang;Wang Penglei;Cui Yifeng(Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学电力电子节能与传动控制河北省重点实验室,秦皇岛066004

出　　处：《电工技术学报》2022年第16期4094-4103,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(61873226);河北省自然科学基金(E2017203320)资助项目。

摘　　要：该文提出一种考虑非正弦磁场分布特征的无刷直流电机转子磁场定向矢量控制技术,此技术既在无需换相区检测的前提下抑制了转矩脉动,又解决了由于直轴电枢反应造成的助磁和去磁的问题。为此,首先,通过对比分析不同转子磁场分布下的转子磁链波形,得出在非正弦转子磁场分布下以转子位置角作为旋转角的等功率3s/2r变换不能实现转子磁场定向的结论;其次,通过改变等功率3s/2r变换矩阵中的旋转角,使得变换后转子磁链无q轴分量,从而建立非正弦转子磁场定向坐标系并得出该坐标系下的动态数学模型;最后,理论推导出无直轴电枢反应运行时给定参考转矩下所需的d、q轴电枢电流求解方程,并以此构建出无刷直流电机无直轴电枢反应的转子磁场定向矢量控制系统。所提控制技术通过相应的数字信号处理(DSP)驱动实验验证了其可行性和有效性。This paper proposes a vector control strategy of brushless DC motor(BLDCM) based on rotor field orientation considering the non-sinusoidal field distribution, which can not only suppress the torque ripple without the detection of commutation zone, but also solve the problems of magnetization and demagnetization caused by d-axis armature reaction. Firstly, through the comparative analysis of the rotor flux waveform under different rotor field distributions, it is concluded that the 3s/2r transformation with the rotor position as rotation angle cannot achieve rotor field orientation when rotor field distribution is non-sinusoidal. Secondly, by changing the rotation angle in the 3s/2r transformation matrix, the rotor flux has no q-axis component after the transformation,thereby establishing a non-sinusoidal rotor field orientation coordinate system and obtaining a dynamic mathematical model under this coordinate system. Finally, the d-axis and q-axis armature currents for a given reference torque without d-axis armature reaction is deduced theoretically, and accordingly the rotor field oriented vector control system without d-axis armature reaction of BLDCM is constructed.The results of DSP experiments show the feasibility and effectiveness of the proposed strategy.

关 键 词：无刷直流电机 非正弦磁场分布 转子磁场定向 无直轴电枢反应 转矩脉动抑制 

分 类 号：TM351[电气工程—电机]