International Journal of Automotive Technology

The Korean Society of Automotive Engineers (한국자동차공학회)
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DEVELOPMENT OF AN ACCELERATED LIFE TEST PROCEDURE FOR COOLING FAN MOTORS

  • Shin, W.G. (School of Mechanical Engineering, Yonsei University) ;
  • Lee, S.H. (School of Mechanical Engineering, Yonsei University) ;
  • Song, Y.S. (Electronic Module Reliability Team, Reliability Division, Korea Automotive Technology Institute)
  • Published : 2006.10.01
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Abstract

Reliability of automotive parts has been one of the most interesting fields in the automotive industry. Especially, a small DC motor was issued because of the increasing adoption for passengers' safety and convenience. For several years, small DC motors have been studied and some problems of a life test method were found out. The field condition was not considered enough in the old life test method. It also needed a lot of test time. For precise life estimation and accelerated life test, new life test procedure was developed based on measured field condition. The vibration condition on vehicle and latent force on fan motor shaft were measured and correlated with each other. We converted the acceleration data into the load data and calculated the equivalent load from integrated value. We found the relationship which can be used for accelerated life test without changing the severity by using different loading factors.

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References

  1. Bolla, G. A. (2002). Accelerated useful life testing and field correlation methods. SAE Paper No. 2002-01-1175
  2. Chin, Y. K. and Soulard, J. (2003). Modeling of iron losses in permanent magnet synchronous motors with field-weakening capability for electric vehicles. Int. J. Automotive Technology 4, 2, 87-94
  3. Hu, J. M. (1994). Physics-of-failure-based reliability qualification of automotive electronics. Communications in RMS 1, 2, July, 21-33
  4. Hu, J. M., Barker, D., Dasgupta, A. and Arora, A. (1993). Role of failure-mechanism identification in accelerated testing, J IES, July/August 39-45
  5. Humphrey, D., Shawlee, W., Sandborn, P. and Lorenson, D. (2002). Utilization life of electronic systems-aging avionics usable life and wear-out issues. SAE Paper No. 2002-01-3013
  6. KATECH (2002). The standardization of the test method and the development of evaluating technology for automotive parts. Annual Project Report for KATECH; The Ministry of Commerce/he Ministry of Science and Technology, December
  7. Kim, H. E., Lee, Y. P. and Yon, Y. C. (2004). Life analysis of ball bearings by accelerated life test. Korea Reliability Society; Session P, 335-342
  8. Korea Machinery Co. (1988). KBS Ball and Roller Bearin, Product Manual. FAG Bearings Korea Corporation, A28-A50
  9. Krasich, M. (2004). Test design and acceleration for product lifetime reliability demonstration. SAE Paper No. 2004-01-1640
  10. Lee, J. S. and Han, D. C. (2000). A study on the static and dynamic equivalent load of the ball bearings. Trans. Korean Society of Automotive Engineers 8, 1, 157-162
  11. Lu, M. W., Leiman, J. E., Rudy, R. J. and Lee, Y. L. (2003). Step-stress accelerated test method-A validation study. SAE Paper No. 2003-01-0470
  12. Nelson, W. (1990). Accelerated Testing; Statistial Models, Test Plans, and Data Analysis. Wiley. New Jersey
  13. Noh, K. H., Lim, J. S., Kim, K. H., and Kim, D. S. (2002). The study for evaluating technology of the accelerated durable load of chassi parts of vehicles by the Korean road. 2002 Symp. Automotive Mechanics, Korean Society Automotive Engineers, 718-729
  14. Rabinowicz, E., Mcentire, R. H. and Shiralkar, B. (1970). A technique for accelerated life testing. J. Engineering for Industry. Trans. ASME Series B, 92, 3, August, 706-710
  15. Toliyat, H. A. and Kliman, G. B. (2004). Handbook of Electric Motors; 2nd Edn, Revised and Expanded. Marcel Dekker. New York
  16. Zhang, C., Le, M. T., Seth, B. B. and Liang, S. Y. (2002). Bearing life prognosis under environmental effects based on accelerated life testing. J. Mechanical Engineering Science, 216, Part C, 509-516 https://doi.org/10.1243/0954406021525304