Oswald, Niall and Stark, Bernard and Holliday, Derrick and Hargis, Colin and Drury, Bill (2011) Analysis of shaped pulse transitions in power electronic switching waveforms for reduced EMI generation. IEEE Transactions on Industry Applications, 47 (5). 2154 - 2165. ISSN 0093-9994Full text not available in this repository. (Request a copy from the Strathclyde author)
Consideration of the higher-order time derivatives of voltage and current transitions in power semiconductor devices enables the specification of S-shaped switching waveforms which offer an improved trade-off between highfrequency EMI generation and switching losses. In comparison with the widely-used first-order derivative trapezoidal switching waveform approximation, Fourier analysis of the proposed Sshaped waveform shows that it exhibits a 20 dB/decade steeper spectral gradient at high frequencies, resulting in a 20 dB greater reduction in high-frequency spectral content per decade increase in rise time. Numerical analysis of the proposed waveform shows that both peak and total RF power, employed as indicative EMI metrics, are reduced significantly with no increase in overall switching time. Experimental investigation of the effect of introducing a frequency-selective EMI transmission path shows that the overall trends in the relationships between time-domain waveform parameters and high-frequency spectral content are maintained, whilst the values of the waveform timing parameters which minimise the two EMI metrics are changed.
|Keywords:||approximation methods , time frequency analysis, switching loss, logic gates, Electrical engineering. Electronics Nuclear engineering, Industrial and Manufacturing Engineering, Control and Systems Engineering, Electrical and Electronic Engineering|
|Subjects:||Technology > Electrical engineering. Electronics Nuclear engineering|
|Department:||Faculty of Engineering > Electronic and Electrical Engineering|
|Depositing user:||Pure Administrator|
|Date Deposited:||24 Aug 2011 11:50|
|Last modified:||21 Apr 2017 07:33|