基于逐相旋转坐标变换的无刷直流电机转子磁场定向瞬时转矩控制技术  

Rotor Field Oriented Instantaneous Torque Control Technology of Brushless DC Motor Based on Per-Phase Rotating Coordinate Transformation

作　　者：李珍国[1] 王鹏磊 孙启航 贾益丞 Li Zhenguo;Wang Penglei;Sun Qihang;Jia Yicheng(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22期5788-5798,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(61873226)。

摘　　要：转子磁场定向无刷直流电机等效模型所具有的d轴转子磁链为恒值、q轴转子磁链始终为零的特征,是构建高性能无刷直流电机瞬时转矩控制系统的有利条件。但是传统的等功率3s/2r坐标变换无法使无刷直流电机得到转子磁场定向等效模型。为此,提出一种基于逐相旋转坐标变换的转子磁场定向方法,即对每相转子磁链逐一进行旋转坐标变换得到各相绕组的转子磁场定向等效模型,再以功率守恒为原则进行三相合成,得到无刷直流电机转子磁场定向等效模型。鉴于该转子磁场定向等效模型中电磁转矩仅与q轴电流成正比而与d轴电流无关,理论推导出直轴电枢反应磁动势、瞬时电磁转矩各自与d、q轴电流之间的关系式,构建了具有无增磁/去磁电枢反应的瞬时转矩控制系统。最后,通过Matlab仿真和DSP驱动实验,验证了所提控制技术的可行性和有效性。The equivalent model of a brushless DC motor(BLDCM)with the rotor field orientation has the characteristics that the d-axis rotor flux linkage is constant and the q-axis rotor flux linkage is zero.It isa favorable condition for building high-performance torque control systems.However,the traditional equal-power 3s/2r coordinate transformation cannot obtain the equivalent model of the rotor field orientation of BLDCM.Therefore,a rotor field orientation method based on per-phase coordinate transformation is proposed.That is,per-phase is transformed one by one to obtain the rotor field orientation equivalent model of per-phase winding,and then the three-phase is synthesized based on the principle of power conservation.Since the torque of the equivalent model is proportional to the q-axis current and independent of the d-axis current,the relationship between the d-axis armature reactive magnetomotiveforce,torque and the d-and q-axis currents is derived.Consequently,a BLDCM torque control system with non-magnetization/demagnetization is constructed.Finally,the feasibility and effectiveness of the proposed control technology are verified by Matlab simulation and DSP driving experiment.

关 键 词：无刷直流电机 转子磁场定向 逐相旋转坐标变换 无增磁和去磁 瞬时转矩控制 

分 类 号：TM351[电气工程—电机]