Influence of the fan cowl on the acoustic noise radiated from PWM controlled induction machines

Z.Q. Zhu, L. Xu, D. Howe

Research output: Contribution to conferencePaper

3 Citations (Scopus)

Abstract

The influence of the fan cowl, particularly the material of which it is made, on the acoustic noise emitted from PWM controlled induction machines is investigated. It is shown that there are significant harmonic excitation forces which can cause mechanical resonances of the fan cowl. The mechanical behaviour of both metal and plastic cowls is measured, using impulse force tests and random PWM excitation. The noise spectra and sound pressure level of a 1.5kW 3-phase induction machine when equipped with a metal and a plastic fan cowl are investigated, and the noise spectra when the machine is supplied from sub-harmonic PWM, space vector PWM and random PWM inverter are compared. It shows that a metal fan cowl can significantly amplify the noise level, whilst the noise level with a plastic fan cowl is effectively the same as that with the cowl removed.

Conference

ConferenceIEMDC 2001: IEEE International Electric Machines and Drives Conference
CountryUnited States
CityCambridge
Period17/06/0120/06/01

Fingerprint

pulse duration modulation
fans
induction
acoustics
plastics
noise spectra
metals
harmonic excitation
resonant vibration
vector spaces
sound pressure
impulses
harmonics
causes
excitation

Keywords

  • influence
  • fan cowl
  • acoustic noise
  • radiated
  • pwm controlled
  • induction machines

Cite this

Zhu, Z. Q., Xu, L., & Howe, D. (2001). Influence of the fan cowl on the acoustic noise radiated from PWM controlled induction machines. 218-224. Paper presented at IEMDC 2001: IEEE International Electric Machines and Drives Conference , Cambridge, United States. https://doi.org/10.1109/IEMDC.2001.939302
Zhu, Z.Q. ; Xu, L. ; Howe, D. / Influence of the fan cowl on the acoustic noise radiated from PWM controlled induction machines. Paper presented at IEMDC 2001: IEEE International Electric Machines and Drives Conference , Cambridge, United States.9 p.
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title = "Influence of the fan cowl on the acoustic noise radiated from PWM controlled induction machines",
abstract = "The influence of the fan cowl, particularly the material of which it is made, on the acoustic noise emitted from PWM controlled induction machines is investigated. It is shown that there are significant harmonic excitation forces which can cause mechanical resonances of the fan cowl. The mechanical behaviour of both metal and plastic cowls is measured, using impulse force tests and random PWM excitation. The noise spectra and sound pressure level of a 1.5kW 3-phase induction machine when equipped with a metal and a plastic fan cowl are investigated, and the noise spectra when the machine is supplied from sub-harmonic PWM, space vector PWM and random PWM inverter are compared. It shows that a metal fan cowl can significantly amplify the noise level, whilst the noise level with a plastic fan cowl is effectively the same as that with the cowl removed.",
keywords = "influence, fan cowl, acoustic noise, radiated , pwm controlled, induction machines",
author = "Z.Q. Zhu and L. Xu and D. Howe",
year = "2001",
month = "6",
doi = "10.1109/IEMDC.2001.939302",
language = "English",
pages = "218--224",
note = "IEMDC 2001: IEEE International Electric Machines and Drives Conference ; Conference date: 17-06-2001 Through 20-06-2001",

}

Zhu, ZQ, Xu, L & Howe, D 2001, 'Influence of the fan cowl on the acoustic noise radiated from PWM controlled induction machines' Paper presented at IEMDC 2001: IEEE International Electric Machines and Drives Conference , Cambridge, United States, 17/06/01 - 20/06/01, pp. 218-224. https://doi.org/10.1109/IEMDC.2001.939302

Influence of the fan cowl on the acoustic noise radiated from PWM controlled induction machines. / Zhu, Z.Q.; Xu, L.; Howe, D.

2001. 218-224 Paper presented at IEMDC 2001: IEEE International Electric Machines and Drives Conference , Cambridge, United States.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Influence of the fan cowl on the acoustic noise radiated from PWM controlled induction machines

AU - Zhu, Z.Q.

AU - Xu, L.

AU - Howe, D.

PY - 2001/6

Y1 - 2001/6

N2 - The influence of the fan cowl, particularly the material of which it is made, on the acoustic noise emitted from PWM controlled induction machines is investigated. It is shown that there are significant harmonic excitation forces which can cause mechanical resonances of the fan cowl. The mechanical behaviour of both metal and plastic cowls is measured, using impulse force tests and random PWM excitation. The noise spectra and sound pressure level of a 1.5kW 3-phase induction machine when equipped with a metal and a plastic fan cowl are investigated, and the noise spectra when the machine is supplied from sub-harmonic PWM, space vector PWM and random PWM inverter are compared. It shows that a metal fan cowl can significantly amplify the noise level, whilst the noise level with a plastic fan cowl is effectively the same as that with the cowl removed.

AB - The influence of the fan cowl, particularly the material of which it is made, on the acoustic noise emitted from PWM controlled induction machines is investigated. It is shown that there are significant harmonic excitation forces which can cause mechanical resonances of the fan cowl. The mechanical behaviour of both metal and plastic cowls is measured, using impulse force tests and random PWM excitation. The noise spectra and sound pressure level of a 1.5kW 3-phase induction machine when equipped with a metal and a plastic fan cowl are investigated, and the noise spectra when the machine is supplied from sub-harmonic PWM, space vector PWM and random PWM inverter are compared. It shows that a metal fan cowl can significantly amplify the noise level, whilst the noise level with a plastic fan cowl is effectively the same as that with the cowl removed.

KW - influence

KW - fan cowl

KW - acoustic noise

KW - radiated

KW - pwm controlled

KW - induction machines

U2 - 10.1109/IEMDC.2001.939302

DO - 10.1109/IEMDC.2001.939302

M3 - Paper

SP - 218

EP - 224

ER -

Zhu ZQ, Xu L, Howe D. Influence of the fan cowl on the acoustic noise radiated from PWM controlled induction machines. 2001. Paper presented at IEMDC 2001: IEEE International Electric Machines and Drives Conference , Cambridge, United States. https://doi.org/10.1109/IEMDC.2001.939302