[논문]Synchronous Periodic Frequency Modulation Based on Interleaving Technique to Reduce PWM Vibration Noise

Zhang, Wentao; Xu, Yongxiang; Ren, Jingwei; Su, Jianyong; Zou, Jibin

doi:10.6113/jpe.2019.19.6.1515

Synchronous Periodic Frequency Modulation Based on Interleaving Technique to Reduce PWM Vibration Noise 원문보기

Journal of power electronics, v.19 no.6, 2019년, pp.1515 - 1526

Zhang, Wentao (Department of Electrical Engineering, Harbin Institute of Technology) , Xu, Yongxiang (Department of Electrical Engineering, Harbin Institute of Technology) , Ren, Jingwei (Hangzhou Applied Acoustics Research Institute) , Su, Jianyong (Department of Electrical Engineering, Harbin Institute of Technology) , Zou, Jibin (Department of Electrical Engineering, Harbin Institute of Technology)

Abstract ▼ AI-Helper

Ear-piercing high-frequency noise from electromagnetic vibrations in motors has become unacceptable in sensitive environments, due to the application of pulse width modulation (PWM) and in consideration of switching losses. This paper proposed a synchronous periodic frequency modulation (SPFM) method based on the interleaving technique for paralleled three-phase voltage source inverters (VSIs) to eliminate PWM vibration noise. The proposed SPFM technique is able to effectively remove unpleasant high-frequency vibration noise as well as acoustic noise more effectively than the conventional periodic carrier frequency modulation (PCFM) and interleaving technique. It completely eliminates the vibration noise near odd-order carrier frequencies and reduces the PWM vibration noise near even-order carrier frequencies depending on the switching frequency variation range. Furthermore, the SPFM method is simple to implement and does not employ additional circuits in the drive system. Finally, the effectiveness of the proposed method has been confirmed by detailed experimental results.

주제어

표/그림 (18)

그림 Fig. 1. Drive system configuration.
그림 Fig. 2. Carrier frequency change law of the sawtooth periodic carrier frequency modulation.
그림 Fig. 3. Implementation of the proposed method.
그림 Fig. 4. Spectrum analysis results of PWM harmonics with the SVPWM, PCFM, interleaving technique and SPFM when 1 / 5 f₀ < Δf_c < 1 / 3 f₀.
표 TABLE I EFFECTS OF THE PROPOSED METHOD
그림 Fig. 5. Current moving path. (a) For fundamental current. (b) For odd-order PWM harmonic current.
그림 Fig. 6. MMF produced by PWM harmonics for one tooth with: (a) SVPWM, (b) PCFM, (c) Interleaving technique, (d) SPFM.
그림 Fig. 7. Test bench and experimental system.
표 TABLE II PARAMETER OF THE EXPERIMENTAL SYSTEM
그림 Fig. 8. Amplitude of the first and second PWM harmonics with four methods under a low modulation ratio for: (a) Current, (b) Vibration, (c) Noise.
그림 Fig. 9. Amplitude of the first and second PWM harmonics with four methods under a medium modulation ratio for: (a) Current, (b) Vibration, (c) Noise.
그림 Fig. 10. Waveforms and spectrum of the current A signal under a high modulation ratio with: (a) SVPWM, (b) PCFM, (c) Interleaving, (d) SPFM.
그림 Fig. 11. Waveforms and spectrum of the vibration signal under a high modulation ratio with: (a) SVPWM, (b) PCFM, (c) Interleaving, (d) SPFM.
그림 Fig. 12. Waveforms and spectrum of the noise signal under a high modulation ratio with: (a) SVPWM, (b) PCFM, (c) Interleaving, (d) SPFM.
그림 Fig. 13. Waveforms and spectrum of the current A signal with the SPFM when: (a) γ = 0.5, (b) γ = 1 , (c) γ = 2.
그림 Fig. 14. Waveforms and spectrum of the vibration signal with the SPFM when: (a) γ = 0.5, (b) γ = 1, (c) γ = 2.
그림 Fig. 15. Waveforms and spectrum of the phase A current when Δf_c = 2kHz with: (a) PCFM, (b) SPFM.
그림 Fig. 16. Waveforms and spectrum of the vibration signal when Δf_c = 2kHz with: (a) PCFM, (b) SPFM.

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