摘要
不同于传统的混合励磁电机,直流偏置型混合励磁电机将励磁绕组和电枢绕组集成于一套绕组,消除附加励磁绕组,具有更高的转矩密度和调磁能力。为高效利用电流并充分发挥混合励磁作用,该文提出一种基于实际信号注入的直流偏置型混合励磁电机最大转矩电流比(maximum torque per ampere,MTPA)控制策略。首先,建立该电机在旋转坐标系下的数学模型,根据MTPA控制原理,得到dq0轴的电流和MTPA判据;进一步,推导出含实际信号的机械功率与MTPA判据之间的关系,采用信号解调制模块获得最佳电流矢量角,实现直流偏置型混合励磁电机MTPA控制;所提方法有效避免电机参数不准确对最佳电流矢量角的影响,提高MTPA的控制精度。实验结果表明,采用提出的控制策略,电机在6和10N·m转矩负载下电流有效值可降低7.0%和3.5%,验证所提出控制策略的有效性。
Unlike traditional hybrid excitation motor,DC-Biased hybrid excitation motor integrates field winding and armature winding into one set of winding to generate DC current and AC current at the same time.Thus,the additional field winding can be eliminated,which gives rise to enhanced torque density and flux adjustment capability.To efficiently utilize current and hybrid excitation function,a maximum torque per ampere(MTPA)control strategy based on actual signal injection for the DC-Biased hybrid excitation motor is presented in this paper.Firstly,the mathematical model of the motor in the rotating coordinate system is established.Then,according to the MTPA control principle,the currents of dq0 axis and the MTPA criterion are obtained.Also,the relationship between mechanical power with actual signal and MTPA criterion is deduced.A signal demodulation module is designed to obtain the optimal current vector angle to realize MTPA control.Through this control strategy,the effect of inaccurate motor parameters on the optimal current vector angle can be avoided and control accuracy of the MTPA can be improved.Experimental results show that with the proposed control strategy,the root-mean-square current of the motor can be reduced by 7.0%and 3.5%at 6 N⋅m and 10 N⋅m torque loads,which verify the effectiveness of the proposed control strategy.
作者
蒋婷婷
徐亮
赵文祥
JIANG Tingting;XU Liang;ZHAO Wenxiang(School of Electrical and Information Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu Province,China;School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167,Jiangsu Province,China)
出处
《中国电机工程学报》
北大核心
2025年第23期9416-9424,I0028,共10页
PROCEEDINGS OF THE CHINESE SOCIETY FOR ELECTRICAL ENGINEERING
基金
江苏省自然科学基金项目(BK20250851)。
关键词
直流偏置
混合励磁电机
实际信号注入
最大转矩电流比控制
DC-Biased
hybrid excitation motor
actual signal injection
maximum torque per ampere(MTPA)control
