Scholarlink

Purpose <p>To address the issue that the current random switching frequency PWM strategy does not consider the impact of motor operation and thus fails to significantly reduce high-frequency noise in permanent magnet synchronous motors (PMSMs), this paper proposes a high-frequency electromagnetic noise suppression method for PMSMs based on a hybrid switching frequency pulse width modulation (HSF-PWM) strategy that takes rotor position into account.</p> Methods <p>The proposed HSF-PWM method comprises four main components: obtaining the rotor position, calculation of Q-axis current ripple values, adjusting strategy function based on rotor position, and updating of the switching frequency. The harmonic content and total harmonic distortion (THD) values under different spread spectrum modulation strategies were compared using a simulation model, and the effectiveness of the proposed method was verified through experimental testing.</p> Results and Conclusions <p>The high-frequency harmonic peak values and sharpness indicators were compared before and after the application of the proposed method. Under no-load condition of 2000 r/min (rated speed), the peak of the high-frequency sideband noise component decreased by 29.72 dB, the overall sound pressure level fell by 5.44 dB, and the mean sharpness reduced by 4.61 acum. Under load conditions of 500 r/min, the peak of the high-frequency sideband noise component decreased by 7.82 dB, the overall sound pressure level fell by 1.95 dB, and the mean sharpness reduced by 0.35 acum, thereby confirming the effectiveness of the proposed method in suppressing high-frequency whistling. The method proposed in this paper offers a novel approach for high-frequency noise suppression in PMSMs.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

High-Frequency Electromagnetic Noise Suppression Method for PMSMs Based on Hybrid Switching Frequency PWM Strategy Considering Rotor Position

  • 期刊论文

  • 发表日期：

    2026年1月26日

查看全文
  • Conggan Ma,
  • Huan Ouyang,
  • Yumeng Zhang,
  • Shengsen Zhou,
  • Zimeng Liu,
  • Yan Ma,
  • Jianjiao Deng,
  • Hongbin Tang,
  • Bin Li

摘要

Purpose

To address the issue that the current random switching frequency PWM strategy does not consider the impact of motor operation and thus fails to significantly reduce high-frequency noise in permanent magnet synchronous motors (PMSMs), this paper proposes a high-frequency electromagnetic noise suppression method for PMSMs based on a hybrid switching frequency pulse width modulation (HSF-PWM) strategy that takes rotor position into account.

Methods

The proposed HSF-PWM method comprises four main components: obtaining the rotor position, calculation of Q-axis current ripple values, adjusting strategy function based on rotor position, and updating of the switching frequency. The harmonic content and total harmonic distortion (THD) values under different spread spectrum modulation strategies were compared using a simulation model, and the effectiveness of the proposed method was verified through experimental testing.

Results and Conclusions

The high-frequency harmonic peak values and sharpness indicators were compared before and after the application of the proposed method. Under no-load condition of 2000 r/min (rated speed), the peak of the high-frequency sideband noise component decreased by 29.72 dB, the overall sound pressure level fell by 5.44 dB, and the mean sharpness reduced by 4.61 acum. Under load conditions of 500 r/min, the peak of the high-frequency sideband noise component decreased by 7.82 dB, the overall sound pressure level fell by 1.95 dB, and the mean sharpness reduced by 0.35 acum, thereby confirming the effectiveness of the proposed method in suppressing high-frequency whistling. The method proposed in this paper offers a novel approach for high-frequency noise suppression in PMSMs.