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In the development of ultra high-voltage (UHV) vacuum circuit breakers (VCB), higher current-rating and improved thermal performance become more and more important to provide safe function and reliability in spite of scale-down and increasing performance demanded of modern devices. Due to the high complexity of heat generation and loss processes, it is not easy to predict temperature-rise of the breaker...
In this paper, a three-dimensional (3D) eddy current field model to calculate the eddy current losses in an isolated phase bus is proposed. The temperature rises of the conductors and enclosures in the isolated phase bus are evaluated using the proposed set of thermal equations. Good agreement between the computed and test results is a good validation of the proposed methodology.
The transient and steady-state thermal modelling of a power bus bar used in automobile power electrical architectures is presented in this paper. Using the developed model, the current carrying capacity, also called ampacity, of this kind of power cable can be accurately predicted. After brief information about bus bars for hybrid-electric vehicle (HEV) and electric vehicle (EV), the study then focuses...
The purpose of this research was to systematically evaluate the utility of thermal analysis techniques in lifetime prediction methods for electrical insulating materials. There have been studies using various separate thermal methods on electrical insulators but there appear to have been no reports where a variety of techniques were applied. Recently the terminology “total thermal analysis” has been...
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