基于电流梯度的桥式半控电励磁双凸极发电机无位置传感器控制  

Position Sensorless Control for Doubly Salient Electromagnetic Machine with Bridge Semi-Controlled Rectifier Based on Current Gradient

作　　者：周兴伟 郭耀武 杨泽锋 周波[2] 张犁[1] Zhou Xingwei;Guo Yaowu;Yang Zefeng;Zhou Bo;Zhang Li(School of Electrical and Power Engineering Hohai University,Nanjing 210024 China;College of Automation Engineering Nanjing University of Aeronautics and Astronautics,Nanjing 210016 China)

机构地区：[1]河海大学电气与动力工程学院,南京210024 [2]南京航空航天大学自动化学院,南京210016

出　　处：《电工技术学报》2025年第6期1784-1795,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52377046);江苏省自然科学基金(BK20242051)资助项目。

摘　　要：可控整流发电是提高电励磁双凸极发电机(DSEG)输出功率的有效途径。针对桥式半控正弦化DSEG系统,该文提出了一种基于电流梯度的无位置传感器控制策略。基于桥式半控DSEG工作模态,发现负向换相区间这一特殊位置区域正弦化DSEG感应电动势与电流梯度的特别对应关系,并提出据此进行转子位置估计;在此基础上,为抑制实际DSEG系统脉冲宽度调制(PWM)斩波导致电流梯度难以计算的问题,提出一种基于脉冲触发的电流梯度获取方法以实现负向换相区间这一特殊区间内的绕组感应电动势信息提取;进一步地,为避免续流电流反向增大易造成误触发的问题,提出一种基于非导通相判定的触发信息约束方法;最后,基于脉冲触发估计获得的三个基准位置,对DSEG转速估计进而获得全周期转子位置估计角,实现DSEG桥式半控整流发电的无位置传感器运行。所提方法无需额外增加硬件电路,实验验证了所提控制方法的正确性与有效性。The doubly salient electromagnetic machine(DSEM)features a simple structure,high reliability,flexible magnetic field regulation,and easy demagnetization in case of failure.It is promising for applications in aviation power supplies and wind power generation.Traditional doubly salient electromagnetic generator(DSEG)often employs uncontrolled rectification generation methods.The output voltage is regulated by adjusting the field current,but this method limits the output power improvement.Compared to the uncontrolled rectification generation,the controlled rectification generation can enhance the output power by adding the armature current regulation.However,the rotor position information is required.Thus,sensorless control for the DSEM with a controlled rectifier is of great research value.Taking the DSEM with a bridge semi-controlled rectifier(BSR)sinusoidal DSEG system as an example,this paper proposes a novel sensorless control strategy based on the current gradient.Firstly,by analyzing the operating mode of the DSEG with BSR,the corresponding relationship between sinusoidal DSEG inductive electromotive force(EMF)and the current gradient is explored in the negative commutation region.A current gradient acquisition method based on pulse triggering is proposed to extract the back EMF information.Furthermore,a triggering information constraint method based on non-conductive phase judgment is proposed to avoid the error trigging caused by the reverse freewheeling.Finally,the estimated rotor position through the electrical cycle can be obtained according to the three reference angular positions and the estimated angular velocity.The current waveforms aligned with previous analyses,and the system's output voltage stabilized at the command value of 36 V,confirming the effectiveness of the controlled rectification generation for the BSR DSEG.Tests on sensorless control for the BSR DSEG were conducted.Under wide speed and load conditions,the proposed method accurately estimated the rotor position throughout the angular c

关 键 词：正弦化电励磁双凸极发电机 桥式半控整流发电 无位置传感器控制 电流梯度 

分 类 号：TM352[电气工程—电机]