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

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

doi:10.1109/IEMDC.2001.939302

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

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

Electronic And Electrical Engineering

Research output: Contribution to conference › Paper

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.

Original language	English
Pages	218-224
Number of pages	9
DOIs	https://doi.org/10.1109/IEMDC.2001.939302
Publication status	Published - Jun 2001
Event	IEMDC 2001: IEEE International Electric Machines and Drives Conference - Cambridge, United States Duration: 17 Jun 2001 → 20 Jun 2001

Conference

Conference	IEMDC 2001: IEEE International Electric Machines and Drives Conference
Country/Territory	United States
City	Cambridge
Period	17/06/01 → 20/06/01

Keywords

influence
fan cowl
acoustic noise
radiated
pwm controlled
induction machines

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10.1109/IEMDC.2001.939302

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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 = jun,

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",

}

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

T2 - IEMDC 2001: IEEE International Electric Machines and Drives Conference

Y2 - 17 June 2001 through 20 June 2001

ER -

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

Abstract

Conference

Keywords

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