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http://dx.doi.org/10.6113/JPE.2015.15.3.841

Influence of Relative Humidity on the Temperature Increase of a Power Converter  

Xu, Yang (School of Information and Electrical Engineering, China University of Mining and Technology)
Chen, Hao (School of Information and Electrical Engineering, China University of Mining and Technology)
Hu, Zhentao (School of Information and Electrical Engineering, China University of Mining and Technology)
Li, Dong (School of Information and Electrical Engineering, China University of Mining and Technology)
Publication Information
Journal of Power Electronics / v.15, no.3, 2015 , pp. 841-848 More about this Journal
Abstract
As a vital part of renewable energy and electrical traction, power converters are supposed to have high reliability and good performance. However, power semiconductors produce considerable heat when the power converter works, which results in high junction temperatures that lower the reliability and performance of the power semiconductors. Many studies show that ambient humidity has a significant effect on power devices, but the influence of high humidity on junction temperatures has yet to be studied. Therefore, this paper presents a thermal model for power converters in moist air to obtain the junction temperature increase, which is utilized for the power converter used in a Switched Reluctance Motor System. Simulation results show that the law of converter temperature distribution is independent of the relative humidity in the case of fixed ambient temperature, whereas the temperature in the power converter decreases as the ambient relative humidity increases. These simulation results are validated with the experimental results.
Keywords
Moist air; Power converter; Relative humidity; Switched reluctance motor system; Thermal model;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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