EPE Association: EPE 1989 - 17 - Lecture Session 2.10: SWITCHED MODE POWER SUPPLIES

EPE 1989 - 17 - Lecture Session 2.10: SWITCHED MODE POWER SUPPLIES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1989 - Conference > EPE 1989 - 17 - Lecture Session 2.10: SWITCHED MODE POWER SUPPLIES

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   ANALYSIS AND DESIGN OF A HIGH FREQUENCY, HIGH POWER SERIES RESONANT INVERTER USING ASYMMETRICAL THYRISTORS
By Praveen Jain; S. B. Dewan [View]
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Abstract: This paper presents the description, analysis and design of a high frequency series inverter. A detailed analysis is given which includes the effect of di/dt inductor and snubber components. Steady-state characteristics of the inverter are presented, and equivalent circuits and expressions to determine switching transients are derived. A design example of 150 kW, 50 kHz inverter is presented to illustrate the design of high frequency series resonant inverter. Finally, the experimental verification of theoretical results is provided.

   STUDY OF A CONTROL METHOD TO GAIN THE BEST DYNAMIC PERFORMANCES OF THE SERIES RESONANT CONVERTER
By B. Souesme; Y. Cheron; M. Metz [View]
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Abstract: In the power electronics field, research on equipment size and weight reduction and improvements in switching conditions have involved lhe development of resonant converters. The properties of such convertors are widely recognized today. However, their control remains critical taking into account the complexity of lheir dynamic behaviour. The authors are proposing in this paper a new control law for the series resonant converter. This control method allows large range transients while keeping the converter in the right working conditions. The transient responses are "abrupt" and without any overshoot and last a minimum time (around one operation period of the converter). Consequently, driven by this control-law, the series resonant converter presents dynamic performances which can be compared to those of a pulse width modulated converter.

   DESIGN OF A THREE OUTPUT ZERO-CURRENT-SWITCHED QUASIRESONANT CONVERTER
By J. Sebastian; M. A. Pérez; F. Nuno; J. Uceda [View]
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Abstract: The design of a zero-switched quasiresonant dc- to-dc converter is presented in this paper. It is a 31 W three output converter operating in the 400 kHz range of switching frequency. The power and drive circuit used are original and, on the other hand, conventional I.C.s for PWM converters have been used as control circuit. The converter has been built and thoroughly tested.

   A GENERAL APPROACH IN DESIGNING CURRENT CONTROLLER FOR SERIES-RESONANT CONVERTER
By G. A Capolino; J. Fu; H. Henao [View]
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Abstract: A new method for designing current controllers for series-resonant converter is presented, analysed and simulated. The proposed control modules deals with series-resonant converters acting in sub-resonant mode and the peak magnitude of the current is commanded by changing the firing frequency of the switches. In the first part of the paper, we present the simple model of the basic series-resonant converter with the state equations corresponding to a R-L load, but it is obvious that the power can be used under DC or AC form with a convenient transformer. The second part of the paper is related to the design and the analysis of the control system. A first approach deals with a linearized continuous model, with a second order input-output transfer function which can be corrected by a ciassical controller. The second approach is related to non-linear control of the converter which is performed by means of " bang-bang " controller in order to follow a sliding trajectory of the reference input.

EPE 1989 - 17 - Lecture Session 2.10: SWITCHED MODE POWER SUPPLIES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1989 - Conference > EPE 1989 - 17 - Lecture Session 2.10: SWITCHED MODE POWER SUPPLIES
	[return to parent folder]

	ANALYSIS AND DESIGN OF A HIGH FREQUENCY, HIGH POWER SERIES RESONANT INVERTER USING ASYMMETRICAL THYRISTORS By Praveen Jain; S. B. Dewan	[View] [Download]
Abstract: This paper presents the description, analysis and design of a high frequency series inverter. A detailed analysis is given which includes the effect of di/dt inductor and snubber components. Steady-state characteristics of the inverter are presented, and equivalent circuits and expressions to determine switching transients are derived. A design example of 150 kW, 50 kHz inverter is presented to illustrate the design of high frequency series resonant inverter. Finally, the experimental verification of theoretical results is provided.

	STUDY OF A CONTROL METHOD TO GAIN THE BEST DYNAMIC PERFORMANCES OF THE SERIES RESONANT CONVERTER By B. Souesme; Y. Cheron; M. Metz	[View] [Download]
Abstract: In the power electronics field, research on equipment size and weight reduction and improvements in switching conditions have involved lhe development of resonant converters. The properties of such convertors are widely recognized today. However, their control remains critical taking into account the complexity of lheir dynamic behaviour. The authors are proposing in this paper a new control law for the series resonant converter. This control method allows large range transients while keeping the converter in the right working conditions. The transient responses are "abrupt" and without any overshoot and last a minimum time (around one operation period of the converter). Consequently, driven by this control-law, the series resonant converter presents dynamic performances which can be compared to those of a pulse width modulated converter.

	DESIGN OF A THREE OUTPUT ZERO-CURRENT-SWITCHED QUASIRESONANT CONVERTER By J. Sebastian; M. A. Pérez; F. Nuno; J. Uceda	[View] [Download]
Abstract: The design of a zero-switched quasiresonant dc- to-dc converter is presented in this paper. It is a 31 W three output converter operating in the 400 kHz range of switching frequency. The power and drive circuit used are original and, on the other hand, conventional I.C.s for PWM converters have been used as control circuit. The converter has been built and thoroughly tested.

	A GENERAL APPROACH IN DESIGNING CURRENT CONTROLLER FOR SERIES-RESONANT CONVERTER By G. A Capolino; J. Fu; H. Henao	[View] [Download]
Abstract: A new method for designing current controllers for series-resonant converter is presented, analysed and simulated. The proposed control modules deals with series-resonant converters acting in sub-resonant mode and the peak magnitude of the current is commanded by changing the firing frequency of the switches. In the first part of the paper, we present the simple model of the basic series-resonant converter with the state equations corresponding to a R-L load, but it is obvious that the power can be used under DC or AC form with a convenient transformer. The second part of the paper is related to the design and the analysis of the control system. A first approach deals with a linearized continuous model, with a second order input-output transfer function which can be corrected by a ciassical controller. The second approach is related to non-linear control of the converter which is performed by means of " bang-bang " controller in order to follow a sliding trajectory of the reference input.