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Experimental study on the heat transfer characteristics of woofer speaker unit

우퍼 스피커 유닛의 열전달 특성에 대한 실험적 연구

  • Kim, Hyung-Jin (Graduate School of Mechanical Engineering, Dong-A University) ;
  • Kim, Dae-Wan (Graduate School of Mechanical Engineering, Dong-A University) ;
  • Lee, Moo-Yeon (School of Mechanical Engineering, Dong-A University)
  • 김형진 (동아대학교 기계공학과 대학원) ;
  • 김대완 (동아대학교 기계공학과 대학원) ;
  • 이무연 (동아대학교 기계공학과)
  • Received : 2014.01.27
  • Accepted : 2014.05.08
  • Published : 2014.05.31

Abstract

The objective of this study is to experimentally investigate the heat transfer characteristics of 200W woofer speaker unit with the input voice signals such as 500 Hz, 1000 Hz, 2000 Hz, and 3000 Hz. The temperature and heat transfer characteristics of the woofer speaker unit were evaluated with the input signals. As results. the temperature of the voice-coil for woofer speaker unit increased with a decrease of the input signals and the temperature differences between parts of the tested speaker unit increased with the decrease of the input voice signals. In addition, the voice-coil temperature for the input signal of 500 Hz showed 48.4 % lower than that of 3000 Hz during 18000 sec.

본 연구의 목적은 우퍼 스피커 유닛의 열전달 특성 고찰하기 위하여 입력신호를 500Hz, 1000Hz, 2000Hz 그리고 3000Hz로 변화시키면서 실험을 수행하였다. 이를 위하여, 우퍼 스피커 유닛의 더스트 캡을 제거하고 보빈 내부에 열전대를 부착하여 보이스 코일에서 발생되는 온도를 측정하였고 주변으로의 열전달 특성을 파악하였다. 결과적으로, 입력신호가 감소할수록 보이스 코일 온도가 증가하였고, 입력신호가 증가할수록 스피커 유닛 각 부품의 온도편차가 증가하는 것을 확인하였다. 또한 1800sec및 입력신호 500Hz에서 보이스 코일 온도는 3000Hz에 비하여 48.4% 감소하였다.

Keywords

References

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