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In this work, the problem of improving the performance of switched mode power supply (SMPS) by reducing the electromagnetic interference (EMI) using simplified chaotic pulse width modulation (CPWM) generation method is addressed. The key is the generation of CPWM by modulating chaotic pulse position modulation (CPPM) and PWM. The advantage of the scheme is the simplicity and the easy implementation...
Forward converter is a popular switched mode power supply circuit that is used for producing isolated and controlled dc voltage from the unregulated dc input supply. This paper analyses the presence of chaos and spectrum of chaos in a forward converter. The simulations are carried out in PSPICE. The spectrum of converter during periodic operation is compared with the spectrum during chaotic operation...
This paper describes the comparative analysis carried out on the closed loop operation of the current controlled boost converter with normal pulse width modulation and with Random modulation. With the normal pulse width modulation the converter is operated periodically and the EMI is measured. Using Random modulation the converter is forced to work chaotically and hence the EMI is measured. A comparative...
DC-DC converters widely employed in various electrical and electronic appliances, release electromagnetic emissions and thus form prominent sources of Electromagnetic interference due to their inherent fast switching. By operating the converters in chaotic mode EMI can be reduced without adding any filters. In this paper, voltage controlled buck converter is analyzed by FFT for EMI reduction under...
This paper analyses the reduction of electromagnetic interference and improvement of electromagnetic compatibility in a DC-DC Buck converter using chaos. Spectrum analysis was carried out on the converter using Matlab-Simulink and the results confirm the reduction of spectral peaks during the chaotic operation of the converter. It is found that there is good agreement between the simulation and experiment...
In this paper, a novel technique employing Genetic algorithm is proposed for controlling chaos in switched mode power converters with chaotic dynamics by optimizing the system parameters. The optimization process entails the selection of system component values in a switching converter, in order to prevent the system entering the chaotic regime. The approach avoids extensive computations that are...
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