EPE Association: NORpie 2000 - Topic 12: MODELLING AND SIMULATION

NORpie 2000 - Topic 12: MODELLING AND SIMULATION
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   ANALYSIS AND MODELLING OF INPUT DYNAMICS OF A PEAK-CURRENT-MODE CONTROLLED BUCK CONVERTER IN CICM
By J. Lempinen; T. Suntio [View]
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Abstract: This paper will present the procedure of small-signal modeling of input dynamics of a peak-current-mode controlled buck converter. A new methodology of modeling peak-current-mode control is briefly reviewed. A two-port representation of a convert is derived with relevant transfer functions and compared to existing models. The presented models predict well the input dynamics of a buck converter. The input admittance behaves as expected up to controller cut- off frequency. The propagation of fast output current pulses will require good dynamics from the down stream converters and can cause easily EMI problems e.g. in distributed power supply systems. The sensitivity to proper filter design is also obvious.

   Evolution Strategies improving Neuro-Fuzzy Design of a Duty-Cycle Compensation Controller used in DC Speed Control Systems
By Ovidiu Grigore; Adriana Florescu; Constantin Radoi [View]
[Download]

Abstract: Based on the principles of neuro-fuzzy and evolution strategies modeling, a duty-cycle compensation controller design used to linearize the nonlinear external characteristics family of a step-down (Buck) or forward DC converter topology that supplies a DC motor is presented. Simulation results show that linearization results are better if modeling with evolution strategies. A better technology to handle fast big amount of data for real-time computation is needed in control systems in order to allow advanced computational intelligence design methods to be easily hardware implemented.

NORpie 2000 - Topic 12: MODELLING AND SIMULATION
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > NORpie - Proceedings > NORpie 2000 > NORpie 2000 - Topic 12: MODELLING AND SIMULATION
	[return to parent folder]

	ANALYSIS AND MODELLING OF INPUT DYNAMICS OF A PEAK-CURRENT-MODE CONTROLLED BUCK CONVERTER IN CICM By J. Lempinen; T. Suntio	[View] [Download]
Abstract: This paper will present the procedure of small-signal modeling of input dynamics of a peak-current-mode controlled buck converter. A new methodology of modeling peak-current-mode control is briefly reviewed. A two-port representation of a convert is derived with relevant transfer functions and compared to existing models. The presented models predict well the input dynamics of a buck converter. The input admittance behaves as expected up to controller cut- off frequency. The propagation of fast output current pulses will require good dynamics from the down stream converters and can cause easily EMI problems e.g. in distributed power supply systems. The sensitivity to proper filter design is also obvious.

	Evolution Strategies improving Neuro-Fuzzy Design of a Duty-Cycle Compensation Controller used in DC Speed Control Systems By Ovidiu Grigore; Adriana Florescu; Constantin Radoi	[View] [Download]
Abstract: Based on the principles of neuro-fuzzy and evolution strategies modeling, a duty-cycle compensation controller design used to linearize the nonlinear external characteristics family of a step-down (Buck) or forward DC converter topology that supplies a DC motor is presented. Simulation results show that linearization results are better if modeling with evolution strategies. A better technology to handle fast big amount of data for real-time computation is needed in control systems in order to allow advanced computational intelligence design methods to be easily hardware implemented.