Noise evaluation method of DC motor according to change of load

Su-Ho Cha; Sung-Hwan Shin

doi:10.7776/ASK.2020.39.2.113

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2020 Vol.39, Issue 2 Preview Page Next Page

Research Article

Noise evaluation method of DC motor according to change of load 부하에 따른 DC모터 소음 평가법

31 March 2020. pp. 113-119

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Abstract

Motor noise is a major concern in order to improve perceptual feeling of car interior sound due to increased motor usage in passenger cars. The purpose of this study is to propose factors that can represent the acoustic performance of motor noise according to the change of load. To this end, at first, it is shown that power spectrum and total loudness are not fit for noise performance, and then, PNB, partial loudness related to the brush friction component, and PNR, partial loudness related to the torque ripple component are investigated as factors representing motor noise. The performance curve of motor noise using PNB and PNR is proposed to identify trends of motor noise according to the loads. The curve could be a guide for the noise control, the selection of motor, and the improvement of a system.

Keywords

Motor noise

Noise evaluation

Load

Sound quality

Loudness

자동차에서의 모터 사용 증가로 자동차 실내 음질(sound quality) 향상을 위해 모터 소음이 주요 관심사이다. 본 연구의 목적은 부하변화에 따른 모터 소음 성능을 나타낼 수 있는 인자를 제안하는 것이다. 이를 위하여, 파워스펙트럼과 라우드니스가 소음 성능을 나타내는데 적합하지 않음을 확인하였고, 브러쉬 마찰 성분과 관련된 부분라우드니스(PNB)와 토크 리플 성분과 관련된 부분라우드니스(PNR)가 소음 성능을 나타내는 인자로 파악되었다. 그리고 PNB와 PNR를 이용하여 부하에 따른 모터 소음의 변화 특성을 나타내기 위한 방법으로 모터 소음 성능 곡선을 제안하였다. 이 곡선은 소음 제어, 모터 선정 및 시스템 개선을 위한 가이드로 활용될 것으로 기대된다.

키워드

모터소음

소음평가

부하

음질

라우드니스

References

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 39
No :2
Pages :113-119
Received Date : 2020-02-13
Accepted Date : 2020-03-16
DOI :https://doi.org/10.7776/ASK.2020.39.2.113

The Journal of the Acoustical Society of Korea ISSN:1225-4428(Print) 2287-3775(Online) 한국음향학회지

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