基于改进型准比例谐振控制的电励磁双凸极电机电流谐波抑制方法  

Current Harmonic Suppression Method of Doubly Salient Electro-Magnetic Machine Based on Improved Quasi Proportional Resonant Control

作　　者：陈旭[1] 张卓然[1] 于立[1] 孙窈 徐秋钰 Chen Xu;Zhang Zhuoran;Yu Li;Sun Yao;Xu Qiuyu(Center for More-Electric-Aircraft Power System Nanjing University of Aeronautics and Astronautics Nanjing,211106,China)

机构地区：[1]南京航空航天大学多电飞机电气系统工信部重点实验室,南京211106

出　　处：《电工技术学报》2023年第14期3836-3848,3861,共14页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金面上项目(51977108);国家自然科学基金重点项目(51737006)资助。

摘　　要：电励磁双凸极电机的非正弦反电动势特性会导致相电流存在较大的2次和4次谐波,从而降低电机的转矩输出能力。同时,电励磁双凸极电机的电流谐波频率较高,导致传统准比例谐振控制器经过双线性变换后会存在较大的谐振频率偏差,使得电流谐波抑制效果有限。针对此问题,该文首先推导了具有零谐振频率偏差的离散变换表达式,并对表达式进行简化处理,提出了一种基于改进型准比例谐振控制的电励磁双凸极电机电流谐波抑制方法。此外,结合电机的反电动势特性,分析了相电流谐波的产生原因,推导了考虑电流谐波和反电动势谐波的电励磁双凸极电机转矩模型,分析了相电流谐波对电机平均转矩的影响。最后,仿真和实验结果表明,所提方法可以有效地补偿谐振频率偏差,抑制电励磁双凸极电机的相电流谐波,提升电机的转矩输出能力。The doubly salient electro-magnetic machine(DSEM)has been proposed by introducing additional field windings on the stator of the switched reluctance motor(SRM).Therefore,the DSEM has a simple and reliable structure and flexible flux-regulation ability,suitable for wide-speed range operation.However,due to the non-sinusoidal back electromotive force(EMF)of DSEM,the phase current has significant 2nd and 4th current harmonics under the conventional sinusoidal current control method.The 2nd and 4th current harmonics will deteriorate the torque capability of the DSEM.Meanwhile,the high harmonic frequency of the DSEM makes the conventional quasi-proportional resonant(PR)controller have considerable resonance frequency deviation under the conventional discretization method.Thus,this paper proposes an improved quasi-PR control based on the discretization method with zero resonance frequency deviation.Firstly,the production mechanism of the current harmonics is analyzed with the help of the back-EMF characteristics of DSEM.Then,the average torque model of the DSEM,considering the current and back-EMF harmonics,is derived.Secondly,the operation principle of quasi-PR control is introduced,and the influence of the control parameter is analyzed through a bode diagram.Then,the equation of resonance frequency deviation under the conventional bilinear transform is derived.The discretization method with zero resonance frequency deviation is proposed by introducing the compensation coefficient based on the bilinear transform.Furthermore,the improved discretization equation is simplified by replacing the tangent function with a polynomial function.The amplitude-frequency response shows that the improved quasi-PR controller can effectively compensate for the resonance frequency deviation.Finally,the current harmonics suppression method of DSEM based on improved quasi-PR control is introduced,and the simulation and experiments are carried out to verify the performance.The performance of improved quasi-PR control is compared with the

关 键 词：电流谐波 电励磁双凸极电机 准比例谐振控制 谐振频率偏差 转矩输出能力 

分 类 号：TM352[电气工程—电机]