Acoustic noise radiated by PWM-controlled induction machine drives

W.C. Lo, C.C. Chan, Z.Q. Zhu, L. Xu, D. Howe, K.T. Chau

Research output: Contribution to journalArticle

116 Citations (Scopus)

Abstract

This paper investigates the acoustic noise radiated from two nominally identical induction motors when fed from sinusoidal, and asymmetric regular sampling subharmonic and space-vector pulsewidth modulation (PWM) converters. The
theory for analyzing the noise spectrum is developed further to account for the interaction between the motor and the drive. It is shown that manufacturing tolerances can result in significant differences in the noise level emitted from nominally identical motors, and that mechanical resonances can result in extremely high noise emissions. Such resonances can be induced by stator
and rotor slot air-gap field harmonics due to the fundamental component of current, and by the interaction between the airgap field harmonics produced by the fundamental and the PWM harmonic currents. The significance of the effect of PWM strategy on the noise is closely related to the mechanical resonance with
vibration mode order zero, while the PWMstrategy will be critical only if the dominant cause of the emitted noise is the interaction of the fundamental air-gap field and PWM harmonics.
LanguageEnglish
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Volume47
Issue number4
Publication statusPublished - Aug 2000

Fingerprint

Acoustic noise
Modulation
Vector spaces
Air
Induction motors
Rotors
Sampling

Keywords

  • acoustic noise measurement
  • induction motors
  • acoustic noise
  • pwm-controlled
  • machine drives

Cite this

Lo, W. C., Chan, C. C., Zhu, Z. Q., Xu, L., Howe, D., & Chau, K. T. (2000). Acoustic noise radiated by PWM-controlled induction machine drives. IEEE Transactions on Industrial Electronics, 47(4).
Lo, W.C. ; Chan, C.C. ; Zhu, Z.Q. ; Xu, L. ; Howe, D. ; Chau, K.T. . / Acoustic noise radiated by PWM-controlled induction machine drives. In: IEEE Transactions on Industrial Electronics. 2000 ; Vol. 47, No. 4.
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Acoustic noise radiated by PWM-controlled induction machine drives. / Lo, W.C.; Chan, C.C. ; Zhu, Z.Q.; Xu, L.; Howe, D.; Chau, K.T. .

In: IEEE Transactions on Industrial Electronics, Vol. 47, No. 4, 08.2000.

Research output: Contribution to journalArticle

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AU - Lo, W.C.

AU - Chan, C.C.

AU - Zhu, Z.Q.

AU - Xu, L.

AU - Howe, D.

AU - Chau, K.T.

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AB - This paper investigates the acoustic noise radiated from two nominally identical induction motors when fed from sinusoidal, and asymmetric regular sampling subharmonic and space-vector pulsewidth modulation (PWM) converters. Thetheory for analyzing the noise spectrum is developed further to account for the interaction between the motor and the drive. It is shown that manufacturing tolerances can result in significant differences in the noise level emitted from nominally identical motors, and that mechanical resonances can result in extremely high noise emissions. Such resonances can be induced by statorand rotor slot air-gap field harmonics due to the fundamental component of current, and by the interaction between the airgap field harmonics produced by the fundamental and the PWM harmonic currents. The significance of the effect of PWM strategy on the noise is closely related to the mechanical resonance withvibration mode order zero, while the PWMstrategy will be critical only if the dominant cause of the emitted noise is the interaction of the fundamental air-gap field and PWM harmonics.

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