考虑静态端部效应的城轨交通用同心笼次级直线双馈电机矢量控制  

Vector Control of Nest-Loop Secondary Linear Doubly-Fed Machine Considering Static End Effect Adapted to Urban Transit

作　　者：葛健 包振 徐伟[2] 唐一融 廖凯举 Ge Jian;Bao Zhen;Xu Wei;Tang Yirong;Liao Kaiju(State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology,Wuhan 430074,China;Key Laboratory of High Density Electromagnetic Power and Systems Institute of Electrical Engineering Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]强电磁技术全国重点实验室(华中科技大学),武汉430074 [2]中国科学院电工研究所高密度电磁动力与系统重点实验室,北京100190

出　　处：《电工技术学报》2024年第24期7752-7763,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52277050);中国博士后科学基金(2023M731178)资助项目。

摘　　要：同心笼次级直线双馈电机是由同心笼转子无刷双馈电机演变而来的一种新型直线电机,具有功率因数可调、可靠性高、中高速区平均推力下降较小、轨道建设成本较低等优点。然而,因物理结构特殊、工作原理复杂等,对同心笼次级直线双馈电机的静态端部效应控制方法的研究仍不够深入,严重限制了该类电机的进一步发展和应用。为此,该文提出了一种带静态端部效应补偿的功率绕组电压定向矢量控制策略。首先,分析了静态端部效应作用规律和补偿方法,建立了考虑静态端部效应的三相静止坐标系数学模型和简化的两相旋转坐标系数学模型;然后,推导了功率绕组电压定向条件下的初、次级电流数学关系,实现了电磁推力方程中两套初级绕组的解耦控制;最后,大量的仿真和实验分析表明,新方法可通过静态端部效应补偿有效提升电机驱动性能,实现平稳运行。Compared with the rotating machine,the linear machine has the advantages of strong climbing ability,small turning radius,low noise,light vehicle weight,and low overall energy consumption,which is especially suitable for urban rail transit drive systems.The nest-loop secondary linear doubly-fed machine(NLS-LDFM)is a new linear machine evolved from the nest-loop rotor brushless doubly-fed machine(BDFM),with a simple structure and easy operation and maintenance.It can overcome the significant thrust and power factor decrease under high speed and large slip.However,traditional control methods for BDFM are unsuitable because of the static end effect and the DC grid supply.Due to the cut-open primary iron core,the static end effect in NLS-LDFM generates the pulsating magnetic field evenly distributed along the motion direction,leading to two sets of asymmetrical three-phase windings and direct coupling.The large harmonic current,including negative sequence current and direct-coupling current,is produced.Furthermore,since the power supply of NLS-LDFM is different from that of BDFM,it is necessary to realize the close loop doubly-fed mode operation in urban transit power supply.Thus,a power winding voltage-oriented vector control strategy with static end effect compensation is proposed.Firstly,the basic structure and operation principle of NLS-LDFM,similar to the BDFM,is introduced.The static end effect and its compensation principle are analyzed.Then,the mathematical model of the three-phase static coordinate system and simplified two-phase rotating coordinate system are established.Secondly,the mathematical relationship of the primary current under the voltage orientation of the power winding is derived,and the decoupling control of two sets of winding in the electromagnetic thrust equation is realized.The power winding and control winding side converter control methods are presented.The constant voltage and frequency ratio control is employed in power winding,and the double close loop control of speed and current is a

关 键 词：直线双馈电机 静态端部效应 矢量控制 城轨交通 

分 类 号：TM359.4[电气工程—电机]