EPE Association: EPE 1997 – 30: Dialogue Session DS3c: SWITCHED AND RESONANT-MODE POWER SUPPLIES

EPE 1997 – 30: Dialogue Session DS3c: SWITCHED AND RESONANT-MODE POWER SUPPLIES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 30: Dialogue Session DS3c: SWITCHED AND RESONANT-MODE POWER SUPPLIES

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   ZERO VOLTAGE SWITCHING CONVERTER FOR MAGNETIC TRANSFER OF ENERGY TO MOVABLE SYSTEMS
By P. Knaup; K. Hasse [View]
[Download]

Abstract: In this paper a system for contactless power transfer is described. It has the ability to feed several independent secondary moving devices. A novel secondarysided converter which feeds a DC voltage link, with voltage clamping and the ability to recover energy from the moving device is proposed. The steady-state and dynamic behaviour of the converter are described. A closed-loop DC link control with good dynamic performance including a control algorithm is developed.

   ANALYSIS OF THE SERIES-PARALLEL MUL TIRESONANT LLC CONVERTER - COMPARISON BETWEEN FIRST HARMONIC APPROXIMATION AND MEASUREMENT
By Dr. T. Duerbaum; G. Sauerlaender [View]
[Download]

Abstract: This paper presents a simplified analysis method for predicting the behaviour of the series-parallel multi resonant LLC converter. The converter is investigated by means of the first harmonic approximation. The method describes the tendencies of the converter behaviour appropriately. Comparison of the approximation with an experimental model reveals the relevance as well as the limitations.

   A NOVEL SPLIT-RAIL SUPPLY GENERATOR FOR USE WITH MEDIUM POWER SINGLE PHASE INVERTER SYSTEMS SUPPLYING LIVE LOADS
By J.A. Gow; C.D. Manning [View]
[Download]

Abstract: Conventional single phase inverters, if supplying live loads, require a split-rail DC source to avoid the source voltage reference fluctuating with respect to earth. This paper proposes a method of generating a split-rail from a single ended DC supply with minimal components while maintaining good system dynamics.

   A PWM AC/AC FULL-BRIDGE USED LIKE A SHUNT AND A SERIAL REGULATOR
By J. C. Oliveira; L C. Freitas, E. A. A. Coelho; V. J. Farias; J. B. Vieira Jr [View]
[Download]

Abstract: This paper presents a PWM AC/ AC Full-Bridge circuit that will be employed at the development of a shunt and a serial regulator. Principle of operation, theoretical analysis, design procedure are provided. The PWM AC/ AC Full Bridge regulators have been validated by simulation and experimental results.

   A DC-DC CONVERTER BASED ON A NEW SERIES RESONANT INVERTER TOPOLOGY
By S. Stefanescu; M. Chindris; L. Vadan [View]
[Download]

Abstract: The series-resonant converter is one of the major classes of electronic power converters that are extensively applied in de-de converters. This technology transfers bulk energy, through a series-resonant circuit in the direct path of the energy transfer. The paper aims to introduce a de-de converter based on a new zero-current-switching (ZCS) series-resonant inverter (SRI) topology. The proposed inverter includes, two switches, and two resonant paths C-L1 and C-L2 (Figure 1). Its main advantages are as follows: output voltage control, reasonable output voltage ripple values, simple structure of the power and control circuits, high frequency operation, soft switching at turn-on/off of the power devices. The paper presents the basic principles and the theoretical analysis of the proposed de-de converter, the analysis of the output voltage ripple, some considerations on the commutation and turn-on/off switches losses, and the PSpice simulation and experimental converter waveforms.

   ANALYSIS AND TEST RESULTS OF DOUBLE BUCK AND BUCK/BOOST QUASI-RESONANT CONVERTERS
By Z. Puklus, L. Hodossy, P. C. Szilagyi [View]
[Download]

Abstract: This paper presents the test results and simplified design method of a new type symmetrical resonant DC/DC converter family. The family includes buck, boost and buck/boost (B/B) converters like the conventional DC-DC converters. Their configurations are based on the conventional buck, boost as vell B/B converters but they have a switched capacitance C and a positive and a negative side. The realised converter operates in the frequency range of 30-300 kHz. This paper contributes the theoretical results of the resonant type DC/DC converters and shows the limits of their usage. The simulation results support the theory of the losing converter. The output voltage-current curve (Vo-Jo) shows the typical features of the converter operation. This paper also deals with converters working with non ideal resonant circuit.

   VDMOS DEVICES FOR LOW OUTPUT VOLTAGE DC/DC CONVERTERS
By J.Fernandez, J. Rebollo, J. Millan, J.A. Cobos; O. Garcia; J. Uceda [View]
[Download]

Abstract: This paper describes specific low on-resistance VDMOS devices to be used as synchronous rectifiers in low output voltage DC/DC converters. The main topologies of DC/DC converters to generate a low output voltage for the new requirements of low power microelectronics technology are also described, obtaining the requirements for the low onresistance transistors. These power transistors have been designed and fabricated and their electrical performance on the DC/DC converters is also included.

   UNIVERSAL INPUT, UNITY POWER FACTOR RECTIFIER USING A NOVEL SEPIC-DERIVED TOPOLOGY
By H. Sree; J. W. Kolar; N. Mohan [View]
[Download]

Abstract: This paper presents the circuit topology of a universal input, unity power factor rectifier using a novel SEPIC-derived topology. The circuit is characterized simultaneously by 1) DC, single-phase and three-phase input voltages in a wide range (i.e. universal input), 2) wide range output voltage and 3) sinusoidal, unity power factor current drawn from the mains. Unlike in the boost-derived topologies where the output voltage minimum is the peak line-to-line input voltage, the output voltage in the proposed topology does not have this restriction. The steady state operation of the circuit has been analyzed on the basis of digital simulations performed. The paper suggests possible configurations of the converter for different input modes. The simulation results have been confirmed with corresponding experimental results from a laboratory prototype.

EPE 1997 – 30: Dialogue Session DS3c: SWITCHED AND RESONANT-MODE POWER SUPPLIES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 30: Dialogue Session DS3c: SWITCHED AND RESONANT-MODE POWER SUPPLIES
	[return to parent folder]

	ZERO VOLTAGE SWITCHING CONVERTER FOR MAGNETIC TRANSFER OF ENERGY TO MOVABLE SYSTEMS By P. Knaup; K. Hasse	[View] [Download]
Abstract: In this paper a system for contactless power transfer is described. It has the ability to feed several independent secondary moving devices. A novel secondarysided converter which feeds a DC voltage link, with voltage clamping and the ability to recover energy from the moving device is proposed. The steady-state and dynamic behaviour of the converter are described. A closed-loop DC link control with good dynamic performance including a control algorithm is developed.

	ANALYSIS OF THE SERIES-PARALLEL MUL TIRESONANT LLC CONVERTER - COMPARISON BETWEEN FIRST HARMONIC APPROXIMATION AND MEASUREMENT By Dr. T. Duerbaum; G. Sauerlaender	[View] [Download]
Abstract: This paper presents a simplified analysis method for predicting the behaviour of the series-parallel multi resonant LLC converter. The converter is investigated by means of the first harmonic approximation. The method describes the tendencies of the converter behaviour appropriately. Comparison of the approximation with an experimental model reveals the relevance as well as the limitations.

	A NOVEL SPLIT-RAIL SUPPLY GENERATOR FOR USE WITH MEDIUM POWER SINGLE PHASE INVERTER SYSTEMS SUPPLYING LIVE LOADS By J.A. Gow; C.D. Manning	[View] [Download]
Abstract: Conventional single phase inverters, if supplying live loads, require a split-rail DC source to avoid the source voltage reference fluctuating with respect to earth. This paper proposes a method of generating a split-rail from a single ended DC supply with minimal components while maintaining good system dynamics.

	A PWM AC/AC FULL-BRIDGE USED LIKE A SHUNT AND A SERIAL REGULATOR By J. C. Oliveira; L C. Freitas, E. A. A. Coelho; V. J. Farias; J. B. Vieira Jr	[View] [Download]
Abstract: This paper presents a PWM AC/ AC Full-Bridge circuit that will be employed at the development of a shunt and a serial regulator. Principle of operation, theoretical analysis, design procedure are provided. The PWM AC/ AC Full Bridge regulators have been validated by simulation and experimental results.

	A DC-DC CONVERTER BASED ON A NEW SERIES RESONANT INVERTER TOPOLOGY By S. Stefanescu; M. Chindris; L. Vadan	[View] [Download]
Abstract: The series-resonant converter is one of the major classes of electronic power converters that are extensively applied in de-de converters. This technology transfers bulk energy, through a series-resonant circuit in the direct path of the energy transfer. The paper aims to introduce a de-de converter based on a new zero-current-switching (ZCS) series-resonant inverter (SRI) topology. The proposed inverter includes, two switches, and two resonant paths C-L1 and C-L2 (Figure 1). Its main advantages are as follows: output voltage control, reasonable output voltage ripple values, simple structure of the power and control circuits, high frequency operation, soft switching at turn-on/off of the power devices. The paper presents the basic principles and the theoretical analysis of the proposed de-de converter, the analysis of the output voltage ripple, some considerations on the commutation and turn-on/off switches losses, and the PSpice simulation and experimental converter waveforms.

	ANALYSIS AND TEST RESULTS OF DOUBLE BUCK AND BUCK/BOOST QUASI-RESONANT CONVERTERS By Z. Puklus, L. Hodossy, P. C. Szilagyi	[View] [Download]
Abstract: This paper presents the test results and simplified design method of a new type symmetrical resonant DC/DC converter family. The family includes buck, boost and buck/boost (B/B) converters like the conventional DC-DC converters. Their configurations are based on the conventional buck, boost as vell B/B converters but they have a switched capacitance C and a positive and a negative side. The realised converter operates in the frequency range of 30-300 kHz. This paper contributes the theoretical results of the resonant type DC/DC converters and shows the limits of their usage. The simulation results support the theory of the losing converter. The output voltage-current curve (Vo-Jo) shows the typical features of the converter operation. This paper also deals with converters working with non ideal resonant circuit.

	VDMOS DEVICES FOR LOW OUTPUT VOLTAGE DC/DC CONVERTERS By J.Fernandez, J. Rebollo, J. Millan, J.A. Cobos; O. Garcia; J. Uceda	[View] [Download]
Abstract: This paper describes specific low on-resistance VDMOS devices to be used as synchronous rectifiers in low output voltage DC/DC converters. The main topologies of DC/DC converters to generate a low output voltage for the new requirements of low power microelectronics technology are also described, obtaining the requirements for the low onresistance transistors. These power transistors have been designed and fabricated and their electrical performance on the DC/DC converters is also included.

	UNIVERSAL INPUT, UNITY POWER FACTOR RECTIFIER USING A NOVEL SEPIC-DERIVED TOPOLOGY By H. Sree; J. W. Kolar; N. Mohan	[View] [Download]
Abstract: This paper presents the circuit topology of a universal input, unity power factor rectifier using a novel SEPIC-derived topology. The circuit is characterized simultaneously by 1) DC, single-phase and three-phase input voltages in a wide range (i.e. universal input), 2) wide range output voltage and 3) sinusoidal, unity power factor current drawn from the mains. Unlike in the boost-derived topologies where the output voltage minimum is the peak line-to-line input voltage, the output voltage in the proposed topology does not have this restriction. The steady state operation of the circuit has been analyzed on the basis of digital simulations performed. The paper suggests possible configurations of the converter for different input modes. The simulation results have been confirmed with corresponding experimental results from a laboratory prototype.