LCCR滤波器设计方法及永磁同步电机高频电流谐波抑制
LCCR滤波器设计方法及永磁同步电机高频电流谐波抑制
DOI:
作者单位:
南京航空航天大学机电学院,南京 210016
中图分类号:
TM351
基金项目:
国家重点研发计划(2024YFB3410004)。
LCCR Filter Design Method and High-Frequency Current Harmonic Suppression in PMSM
Author:
WANG TianzuoWANG Tianzuo
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016
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ZHOU Yang
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016
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ZHANG Hanlin
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016
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ZHOU Jin
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016
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Affiliation:
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing 210016
摘要 | | 访问统计 | 参考文献 [16] | | || 文章评论摘要:
由脉宽调制(Pulse width modulation, PWM)引起的开关电流谐波会造成真空环境下磁悬浮分子泵驱动电机发热,从而影响分子泵的可靠性。LCCR型的无源滤波器可以有效抑制高频开关谐波,然而LCCR滤波器4个元器件参数对滤波器频率特性的影响相互耦合,难以准确设计。为解决这一问题,本文提出了滤波器参数的系统化设计流程,首先,基于双重傅里叶分析研究了开关谐波的产生机理及频谱特性,随后使用谐波矢量法分析了开关电流谐波幅值与PWM之间的关系,探究了高调制比下高频电流谐波幅值显著增大的原因,说明了对高速电机高频谐波进行抑制的必要性。在此基础上,提出了LCCR滤波器的参数设计方法,分析了各元器件参数对系统频响特性的影响,并通过伯德图验证了引入LCCR滤波器后电流环的稳定性。实验结果表明:采用依据本文设计方法设计的LCCR滤波器,电机相电流总谐波失真(Total harmonic distortion,THD)从35.48%降低至6.50%,在额定转速下,定子温度稳定时从68.5 ℃降至50.5 ℃。
Abstract:
The switching current harmonics caused by pulse width modulation(PWM) leads to overheating of the drive motor in vacuum environment, which affecting the reliability of the molecular pump. The LCCR filter can effectively suppress high-frequency switching harmonics. However, the parameters of the four components in the LCCR filter have a coupled effect on the frequency characteristics, making it difficult to design accurately. To address this issue, this paper proposes a systematic design process for filter parameters. Firstly, based on double Fourier analysis, the generation mechanism and spectral characteristics of switching harmonics are analyzed. Subsequently, the relationship between the amplitude of switching current harmonics and PWM modulation is analyzed using harmonic vector method. The reasons for the significant increase in harmonic amplitude of high-frequency current under high modulation ratio are explored, highlighting the necessity of suppressing high-frequency harmonics in high-speed motors. On this basis, a parameter design method for LCCR filters is proposed, and the influence of various component parameters on the system frequency response characteristics is analyzed. The stability of the current loop after introducing the LCCR filter is verified through a bode plot. Experimental results show that using the LCCR filter designed according to the method in this paper, the total harmonic distortion (THD) of motor phase current is reduced from 35.48% to 6.50%, and the stabilized stator temperature under rated speed decreases from 68.5 ℃ to 50.5 ℃.
引用本文王天佐,周扬,张瀚林,周瑾. LCCR滤波器设计方法及永磁同步电机高频电流谐波抑制[J].南京航空航天大学学报,2026,58(1):202-209
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