基于变直流母线电压的磁耦合式励磁系统控制策略研究  

Research on Magnetic Coupling Excitation System Control Strategy Based on Variable DC Bus Voltage

作　　者：林贤宏 黄东晓 洪泽全 汪凤翔 LIN Xianhong;HUANG Dongxiao;HONG Zequan;WANG Fengxiang(College of Advanced Manufacturing,Fuzhou University,Quanzhou 362000,China;Quanzhou Institute of Equipment Manufacturing,Haixi Institute,CAS National and Local Joint Engineering Research Center for Electrical Drives and Power Electronics,Quanzhou 362216,China;Key Laboratory of Intelligent Machining Technology and Equipment in Fujian Province,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福州大学先进制造学院,泉州362000 [2]中国科学院海西研究院泉州装备制造研究中心电机驱动与功率电子国家地方联合工程研究中心,泉州362216 [3]福建理工大学福建省智能加工技术与装备重点实验室,福州350118

出　　处：《微特电机》2024年第10期31-36,共6页Small & Special Electrical Machines

基　　金：泉州市科技计划项目(2021C020R)。

摘　　要：磁耦合式无线励磁系统是电励磁同步电机无刷化研究的热点之一。该励磁系统包括原边能量发射装置和副边接收装置,其中副边固定在电机转子上,并与之同步转动。为实现副边无通讯并减轻转子质量,在电励磁同步电机无线励磁系统中提出一种变直流母线电压的原边控制策略。考虑到原边补偿电感电流受逆变器高次谐波电压影响,导致励磁电流估算存在误差,采用卡尔曼滤波,滤除高次谐波,提高系统励磁电流估算精度;利用发射线圈电流和滤波后的原边补偿电感电流,得到磁耦合式无线励磁电机的励磁电流估算值;基于该励磁电流估算模型调节原边侧DC-DC变换器的母线电压,实现原边侧对副边侧励磁电流的无通讯调节。仿真结果表明,所提方法在励磁绕组阻抗变化及励磁电流突变工况下,能有效提高励磁电流估算精度及控制精度。Magnetic-coupled wireless excitation(MCWE),one of the research hotspots of the alternative brushless solutions of the electrically excited synchronous motor(EESM),contains the transmitting device in the primary side and the receiving device in the secondary side that fixed on the rotor.To enable secondary-side communication-free operation and reduce rotor weight,this study introduces a variable DC bus voltage primary-side control strategy in the wireless excitation system of EESM.Initially addressing the impact of inverter-induced high-order harmonic voltages on primary compensating inductor currents and consequent excitation current estimation errors,a Kalman filter approach was employed to suppress these harmonics,enhancing excitation current estimation accuracy.Subsequently,magnetic coupling wireless excitation motor excitation current estimates are derived from filtered primary compensating inductor and transmitter coil currents.The primary-side DC-DC converter's bus voltage was then modulated based on this excitation current model,facilitating secondary-side excitation current control without communication.Simulation validates the method's efficacy in improving excitation current estimation and control precision amid excitation winding impedance variations and sudden excitation current shifts.

关 键 词：无线电能传输 电励磁同步电机 励磁电流估算 变直流母线电压控制 卡尔曼滤波 

分 类 号：TM359.9[电气工程—电机]