Development of Heat Dissipation Measuring System for 1.2-kW BLDC Motor

1.2kW 급 BLDC 모터의 열 발산 측정 시스템 개발

  • Lee, Injun (School of Mechanical Engineering, Yeungnam Univ.) ;
  • Ye, Jungwoo (School of Mechanical Engineering, Yeungnam Univ.) ;
  • Lee, Daehun (School of Mechanical Engineering, Yeungnam Univ.) ;
  • Hwang, Pyung (School of Mechanical Engineering, Yeungnam Univ.) ;
  • Shim, Jaesool (School of Mechanical Engineering, Yeungnam Univ.)
  • 이인준 (영남대학교 기계공학부) ;
  • 예정우 (영남대학교 기계공학부) ;
  • 이대훈 (영남대학교 기계공학부) ;
  • 황평 (영남대학교 기계공학부) ;
  • 심재술 (영남대학교 기계공학부)
  • Received : 2013.03.28
  • Accepted : 2013.09.06
  • Published : 2013.11.01


In this study, a heat dissipation measurement system is developed to analyze a 1.2-kW BLDC motor. It is important to check the temperature of the motor because an increase in temperature causes problems in the motor insulations, which in turn influences the motor life. A generator for a vehicle is installed to set up a load. We changed the load from 165 to 495 W. While the rpm varies from 2000 to 4000 under various load conditions, the changes in temperature were measured for the operating period by using a thermocouple. The results of experiments conducted under natural convection conditions suggest that the temperature was not stationary with the rpm, load, and coil of the motor and it kept increasing over $120^{\circ}C$. However, under forced convection conditions, the temperature stationarily reached $84^{\circ}C$ after 4000 s. The difference between the maximum and the minimum temperatures was $10-26^{\circ}C$ with an increase in the rpm and load. The orders of high temperature were as follows: motor coil (Ch#1), side of motor surface (Ch#5), inside of motor cap (Ch#2), upper side of motor surface (Ch#4), and inner wall of the motor (Ch#3).


BLDC Motor(Brushless D/C Motor);Load;Thermocouple


Supported by : 한국산업기술진흥원


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