Reliability Evaluation on PTC Heater Using Accelerated Life Test and Failure Analysis

고장 분석과 가속 수명시험을 통한 PTC 히터의 신뢰성 평가

Choi, Hyoung-Seuk

  • Received : 2015.11.18
  • Accepted : 2015.11.24
  • Published : 2015.12.01


In this paper, the failure mechanism of PTC heater were examined closely by failure analysis and based on it, accelerated life test were conducted. Finally, life distribution and acceleration model were established. The failure mechanism of PTC heater such as crack, increase of resistance due to heating were identified. Two acceleration factors such as temperature, humidity were chosen with two levels each and accelerated life test were done. Life distribution were identified as Weibull distribution with shape parameter 5.4 and Temperature-Humidity model was fitted as an acceleration model.




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