基于降阶动态相量模型的电感耦合式励磁系统间接励磁电流估计  

Indirect Field Current Estimation Algorithm for Inductively Coupled Excitation Systems Based on Reduced-Order Dynamic Phasor Model

作　　者：付兴贺[1] 夏宏伟 熊嘉鑫 Fu Xinghe;Xia Hongwei;Xiong Jiaxin(School of Electrical Engineering Southeast University,Nanjing 210096 China)

机构地区：[1]东南大学电气工程学院,南京210096

出　　处：《电工技术学报》2023年第19期5152-5163,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51977035)。

摘　　要：电励磁同步电机(EESM)具有稀土永磁材料依赖性低、励磁磁场可控、调速范围广的优点,在新能源汽车驱动领域拥有良好的应用前景。利用电感耦合式无刷励磁技术可以有效降低传统有刷EESM的摩擦损耗和维护成本。但是,无刷励磁技术的引入导致励磁电流无法直接测量,因此提出一种基于降阶动态相量模型的间接式励磁电流估计方法。首先利用电感耦合关系将励磁电流的直接估计转换为间接估计,有效地提高了算法的鲁棒性;然后推导出励磁电流降阶动态相量估计模型,进一步提高间接估计方法的精度;接着考虑电流谐波影响,提出变系数改进方法;最后通过仿真和实验验证了估计方法的有效性。Electrically excited synchronous machines(EESM)has the advantages of low dependence on rare earth permanent magnet materials,controllable excitation field and wide speed regulation range,and has a good application prospect in electric vehicles.However,the traditional EESM's brush-slip ring structure caused friction loss,increased maintenance costs,and reduced reliability.Therefore,brushless excitation has become an urgent requirement and a critical issue to be solved for EESM applications.Inductively coupled brushless excitation technology can effectively reduce friction losses and maintenance costs.Currently,mainstream brushless excitation methods include exciter type,harmonic excitation type,and wireless power transfer type.Wireless power transfer excitation can be divided into inductive coupling and capacitive coupling types.Inductive coupling excitation has a simple structure and high transmission efficiency,making it promising for applications.However,the usage of brushless excitation technology will bring a new challenges.The excitation winding of brushless excitation system rotates with the rotor,and there is no direct electrical connection between the transmitting circuit and the receiving circuit,resulting in the acquisition of excitation current value facing technical challenges.To estimate the field current in similar scenarios has been the scope of some previous studies.The existing current estimation methods can achieve good results in their respective application fields,but there are some limitations and shortcomings,which need to be further developed.In view of this,an indirect excitation current estimation method based on reduced order dynamic phasor model is proposed for series-series compensation inductively coupled brushless excitation system,which has the characteristics of simple calculation,strong load adaptability and low hardware cost.The topology structure of excitation energy transmission circuit is designed.The equivalent circuit model of excitation system is established.In order to avo

关 键 词：电励磁同步电机 电感耦合式无刷励磁技术 电流估计 动态相量模型 

分 类 号：TM341[电气工程—电机]