PWM激励下电励磁磁通切换电机励磁绕组感应脉动电压产生机理及其抑制方法研究

电励磁磁通切换电机将励磁绕组和电枢绕组都放置在定子上，克服了永磁电机一系列缺陷，具有较好的应用前景。但因为双凸极电机的本质特征，励磁绕组在电机运行时会产生出感应脉动电压。这不仅会导致励磁绕组电流脉动，影响电机的控制性能，更会影响励磁电源的可靠性。许多学者对励磁绕组感应脉动电压展开了一系列研究，但目前的分析都以忽略绕组电流中脉宽调制（Pulse width modulation, PWM）谐波为前提。申请人在研究中指出PWM激励下的励磁绕组感应脉动电压影响较大，不可忽略。本项目将基于该发现首先分析PWM激励下的励磁绕组感应脉动电压产生机理，接着建立该感应脉动电压预测模型。随后根据该感应脉动电压的特性，提出多角度的抑制方法。最后搭建实验平台，进行电机性能测试和相关实验验证。本项目将不仅补足目前电励磁磁通切换电机研究的短板，更能提出新的励磁绕组感应脉动电压抑制方法，开阔研究思路。

Both DC field and AC armature windings are located in the stator in wound field switched flux (WFSF) machines, which overcomes a series of defects of permanent magnet machines and have bright application prospects. However, due to the inherent nature of the doubly salient machines, the DC field winding suffers from induced pulsating voltage during the operation of the machine. This will not only induce field current ripple and deteriorate the control performance of the machine, but also influence the reliability of the DC winding power supply. Many researchers have carried out a series of studies on the DC winding induced pulsating voltage, but all the current research are based on the assumption of ignoring the pulse width modulation (PWM) harmonics in the winding currents. However, the applicant pointed out that DC winding induced pulsating voltage under PWM excitation has a great influence on the machine system performance and cannot be ignored. Based on this, this project will firstly analyze the production mechanism of DC winding induced pulsating voltage caused by PWM excitation. After that, this project will establish DC winding induced pulsating voltage forecasting model under PWM excitation. Then, multi-angle suppression methods will be proposed based on the characteristics of DC winding induced pulsating voltage under PWM excitation. Finally, the experimental platform for the WFSF machines will be built to test motor performance and related experimental validation. This project will not only make up for the shortcomings of the current research for the WFSF machines, but also propose new suppression methods for the DC winding induced pulsating voltage and broaden the research ideas.