摘要
高速电动机供电系统的谐波电流较大,谐波抑制比较困难,滤波器拓扑结构及滤波器参数的合理选择成为高速电动机控制技术的一个重要问题。高速电动机采用通用PWM变频器时产生的谐波电流会导致高速电机的附加损耗。分析了抑制高速电动机供电系统谐波电流的方法,通过对多种谐波抑制方法的比较,研究了两种有效的谐波电流抑制方法。即在变频器输出端配置两种复合滤波器,这两种方法可以在较宽的频带范围内,在基本上不削弱基波的情况下,能够有效地抑制变频器输出侧的谐波电流。谐波电压也可以通过该滤波器抑制。通过对一台额定功率为10 k W、额定转速为12 000 r/min的高速永磁电动机的仿真和实验研究验证了该方法的有效性,为实际应用提供了理论依据。
The current harmonic of high-speed motor power supply system is larger which is more difficult to be suppressed. It has become an important issue for high-speed motor control to reasonably choose the topology and parameters of filter. The current harmonic produced by PWM converter will cause additional losses of high speed motor. The suppression methods of current harmonic for high speed motor power supply were analyzed in this paper. Two effective methods of current harmonic suppression were studied based on comparing several methods. That is, assembling two kinds of compound filter at the output side of the converter can effectively suppress the current harmonic components within a wide frequency band without weakening too much the fundamental current component. The voltage harmonic components can also be suppressed by the filter. The validities of the proposed methods were verified by the simulation and experiment results on a high -speed permanent magnet motor with rated power 10 kW and rated speed 12 000 r/min which have provided theoretical basis for application.
出处
《微特电机》
北大核心
2015年第4期21-24,27,共5页
Small & Special Electrical Machines
基金
国家自然科学基金重点项目(50437010)
