EPE Association: EPE 1999 - Topic 02a: Soft Switching Converters (Resonant, ZVS, ZCS)

EPE 1999 - Topic 02a: Soft Switching Converters (Resonant, ZVS, ZCS)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1999 - Conference > EPE 1999 - Topic 02: POWER ELECTRONICS CONVERTER CIRCUITS > EPE 1999 - Topic 02a: Soft Switching Converters (Resonant, ZVS, ZCS)

   [return to parent folder]

   A 30 kW Induction Heating Device for Brazing Brass Fittings
By W. Oborski; P. Pupar [View]
[Download]

Abstract: The paper presents some design ideas of a series resonant inverter–based induction heating device destinated for brazing brass fittings to copper tubbings of heating elements. The computer simulation– based comparison of base and modified series resonant inverter topology is presented. The most important problems with developing resonant inverter for desired brazing techology are discussed. Selected results of laboratory tests are presented.

   A Bi-Directional Phase-shifted DC/DC Converter
By K.W.E. Cheng; H.L. Chan; D. Sutanto [View]
[Download]

Abstract: A novel zero-voltage-switching (ZVS) bi-directional phase-shifted DC-DC converter is proposed. The converter has no filter inductor or series resonant capacitor. It operates at a constant switching frequency and the voltage conversion ratio is regulated by the phase-shift control. It has bi-directional power flow capability and synchronous rectification hence the on-state voltage drop of the devices are small. In addition, the newly developed converter is an ideal candidate for Electric Vehicle (EV), since its bi-directional power flow feature is especially useful for regenerative braking in EV, where the mechanical energy is converted into electrical energy by traction motor and then fed back into the batteries.

   A Generalized approach to Obtain the Steady-State Characteristics of DC/DC and DC/AC Resonant Converters
By R.M. Lamaison-Urioste; A. Esquivel; J. Bordonau; J. Peracaula [View]
[Download]

Abstract: A generalized approach for the steady-state characteristics determination in high-order resonant DC/DC and DC/AC converters is presented. All topologies with 2 and 3 resonant elements, as well as many others up to 12 resonant elements are covered. Generalized ¡Ç and T networks and first harmonic approximation are used. In order to verify the relevance of the method a DC/DC LCC current source resonant converter with a nominal output power of 80 W and a resonant frequency of 250 kHz has been built and measured.

   A Novel Method for Optimising of Soft Switched Inverter with Quas...
By V. Racek; R. Kristof; P. Flajnik [View]
[Download]

Abstract: An optimal design of resonant elements, switching strategy and selection of the switching devices for the presented inverter is treated in the paper. The method of optimizing the inverter is based on experimental and theoretical investigations of the components and the functionality of the inverter topology.

   A Novel Quasi-Resonant DC Link Inverter Using Coupled Inductors
By M.D. Bagewadi; B.G. Fernandes; R.V.S. Subrahmanyam [View]
[Download]

Abstract: In this paper a novel quasi resonant DC link inverter using coupled inductors is proposed which pulls down the DC link voltage to zero for soft switching of inverter devices. The circuit uses a single switch in the quasi-resonant stage. In addition it has all advantages of many other QRDCL inverters like true PWM capability, snubberless and load independent operation. Various modes of operation are described with their equivalent circuits. The circuit is simulated using PSPICE and tested under all possible loading conditions.

   A ZCS Class-E Amplifier with a Capacitive Impedance Inverter Used as a Single-Stage High-Power-Factor Electronic Ballast for Fluorescent Lamps
By M. Ponce; R. Vásquez; J. Arau; J. Marcos Alonso [View]
[Download]

Abstract: In this paper a Zero-Current-Switching (ZCS) class E-amplifier is proposed as fluorescent lamp ballast. The ZCS-class E-amplifier features lower voltage stress accross the switch than the Zero-Voltage-Switching (ZVS) class E amplifier. This is an important advantage which allow to supply the circuit from the American main voltage (Vac = 120 V), maintaining only one switch for the ballast. The operation and characteristics of the ZCS class E amplifier as electronic balast are analysed in this paper. The presented study includes selection of the more suitable resonant tank, power factor correction using the "modified valley fill" technique and parametric analysis of the ZCS class E amplifier.

   Analysis of Different Buck Topologies for VRM Applications
By F. Gennaro; C. Cavallaro; A. Testa [View]
[Download]

Abstract: The demand of lower working voltage for data processing applications has been reqiering more efficient power converters due to the increased current level. The present trend is oriented to the VRM (Voltage Regulator Module) solution which allows to satisfy high performance specifications typical of the aforementioned applications. The evaluation of different configurations of Buck converters for low voltage applications is performed in order to choose a suitable converter configuration for a VRM core. The considered converters operate in hard and soft switching and are equiped with diode and synchronous output rectification. The comparison is made in terms of overall efficiency, power device stresses, electromagnetic emissions and converter sizes. Design guidelines are finally given in order to select the best topology accoring to the specific application.

   Comparison of PWM Operated Resonant DC-Voltage Link Inverters
By G. Bachmann; P. Mutschler [View]
[Download]

Abstract: To improve the line and/or load side characteristics of medium to high power converters, it is desirable to increase their switching frequency. Additionally, it is advantageous to have a low dv/dt at the output voltages, especially when a motor is connected via a long cable to the inverter. Resonant converters claim to fulfil both items, because lower switching losses in the semiconductors should allow higher switching frequencies and the output voltage is shaped by the resonant operation. A lot of resonant topologies have been proposed, the Resonant Pole topology seems to be interesting for high power applications. In the range of medium power, which is the topic of this paper, the PWM-operated Resonant DC-Voltage Link Inverters may be favourable because they consist of clearly less individual parts. In this paper, the advantages and drawbacks of three different topologies are shown by analysing simulation results. An experimental set-up for one of the investigated inverters is under construction which will be used to examine the voltage and current stresses and the power dissipation of the active and passive components.

   Extensions of a new full-ZVS-range DC-DC Converter with Reduced Magnetics Requirement
By R. Ayyanar; N. Mohan [View]
[Download]

Abstract: A novel hybrid soft-switching converter featuring zero-voltage-switching (ZVS) over the full load range and reduced filter requirement was proposed in [1,2]. In this paper the various topological variations of the hybrid converter are discussed. Specific applications, for which each of the variations is best suited, are indicated. Experimental and simulation results of the basic hybrid converter and some of its extensions are presented.

   High Precision and High Frequency Four Quadrant Power Converter (+/- 600A, +/- 12V)
By P. Cussac; F. Bordry; A. Dupaquier [View]
[Download]

Abstract: The LHC (Large Hadron Collider) particle accelerator makes extensive use of true bipolar power converters. All these converters will be installed in excavated caverns underground; hence the necessity for minimum volume and high efficiency for the power converters. This paper presents the design and the realisation of a compact (19”,6U) and high frequency (50 kHz) four-quadrant power converter [±600 A, ±12 V]. The obtained performance (DC stability, efficiency, EMC,…) is presented and discussed.

   Insulated DC to DC ZVS Converter with Wide Input Voltage Range
By O. Rieux; P. Ladoux; T. Meynard [View]
[Download]

Abstract: The authors have addressed the issue of DC to DC soft-switching insulated converters, with high input voltage and wide input voltage range. A new converter has been designed. Its topology and mode of operation are presented here.

   Modelling and Control Design Issues for the Modified Series Resonant Converter
By S. V. Mollov; A. J. Forsyth [View]
[Download]

Abstract: The modelling and control of the Modified Series Resonant Converter (MSRC) is addressed. Using the fundamental frequency analysis, a model of the converter is derived, which is used to examine the system characteristics under both frequency and resonant current control. The performance and limitations of each control are described and the implications for the power circuit design are explored. Full supporting experimental results are included.

   New control design for a resonant DC-AC Converter
By J.M. Hubé; D. Flieller; J.-P. Louis [View]
[Download]

Abstract: This paper presents command strategies for a serial DC-AC converter. They are based on the properties of a classical phase loop lock device, the CD4046. We develop a new command in which the output current is always in phase with the fundamental of the output tension. Small signal sampled-data models and linear models are set up and some experimental results are also shown in this paper.

   Resonant DC-AC Converter with Low Pulsed Output Voltage
By D. Alexa; J. P. Six; A. Sirbu; L. Gitlan; A. Lazar [View]
[Download]

Abstract: The paper presents a new resonant DC link inverter that allows PWM capability and lower output overvoltages. This is obtained by keeping capacitor at a constant voltage, while the resonant circuit is continuously operated. the basic operating principle is discussed and the main advantages of the proposed circuit are commented. Detailed design-oriented analysis and relevant simulation results are also given.

   Soft Switching Converter and Switched Reluctance Motor
By R. E. Hanitsch; L. G. B. Rolim [View]
[Download]

Abstract: The converter topology used for the switched reluctance drive system is a variation of the actively clamped resonant DC link converter (ACRDCL) /1/. A modification of the circuit was introduced which allows for applying a higher voltage on the phase windings during demagnetization. Beside the experimental work simulations were done. The proposed soft-switching SRM drive is capable of operation in current-controlled mode, with switching frequencies above audible region, with better efficiency and higher power density than a hardswitching SRM drive.

   Three phase current source soft switching PWM converter with a single resonant DC link snubber
By M. Ishibashi; Y. Konishi; S. Mobin; H. Ogiwara; M. Nakaoka [View]
[Download]

Abstract: In this paper, a new prototype of three-phase current-fed zero current soft switching PWM converter using a single switched capacitor type resonant DC link (RDCL) circuit is described, which is operating by processing based the new conceptual optimum PWM pattern algorithm for efficient high-power utilization. The working principle, design approach as well as operating performances of this converter suitable for large capacity applications in industry and power systems are discussed herein from an experimental point of view. The effectiveness of this soft-switching optimum PWM converter with sinewave current shaping and unity power factor correction schemes is proved on the basis of experimental results.

   Three-phase rectifier with quasi-resonant DCL and a high power factor
By H. Siebel; J. Pacas [View]
[Download]

Abstract: A new three-phase soft-switching rectifier is presented. The topology consists of a PWM boost converter with continuous input currents and an additional resonant branch, which provides low loss at high frequency operation. This leads to a high conversion efficiency and a remarkable reduction in the size of input inductor.

   Three-Phase Soft-Switching Inverter with Active Resonant Snubbers
By H. Yamamoto; H. Ogiwara; H. Iwamoto; H. Hattori; M. Nakaoka [View]
[Download]

Abstract: In this paper, described is a practical design procedure for prototype of the auxiliary resonant commutated snubber circuit (ARCS) incorporating a current feedback transformer with power regeneration loop. For realization of three phase voltage-fed soft-switching inverter, soft-switching active power filter and reactive power compensator, This type of soft-switching power conversion topology has significant merit of effective and peak current rating reduction for auxiliary active switching devices in the ARCS. This paper also presents a novel version of digitally-controlled voltage source type space vector-modulated inverter with ARCS which can operate under a zero voltage soft-switching condition. The steady-state operating analysis of this ARCS has the remarkable features and the practical design procedure of this resonant snubber are illustrated on the basis of computer simulation analysis. The steady-state operating performance of this soft-switching inverter with ARCS are evaluated and discussed as compared with conventional three phase voltage source space vector modulated inverter operating at hard switching-transition mode.

EPE 1999 - Topic 02a: Soft Switching Converters (Resonant, ZVS, ZCS)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1999 - Conference > EPE 1999 - Topic 02: POWER ELECTRONICS CONVERTER CIRCUITS > EPE 1999 - Topic 02a: Soft Switching Converters (Resonant, ZVS, ZCS)
	[return to parent folder]

	A 30 kW Induction Heating Device for Brazing Brass Fittings By W. Oborski; P. Pupar	[View] [Download]
Abstract: The paper presents some design ideas of a series resonant inverter–based induction heating device destinated for brazing brass fittings to copper tubbings of heating elements. The computer simulation– based comparison of base and modified series resonant inverter topology is presented. The most important problems with developing resonant inverter for desired brazing techology are discussed. Selected results of laboratory tests are presented.

	A Bi-Directional Phase-shifted DC/DC Converter By K.W.E. Cheng; H.L. Chan; D. Sutanto	[View] [Download]
Abstract: A novel zero-voltage-switching (ZVS) bi-directional phase-shifted DC-DC converter is proposed. The converter has no filter inductor or series resonant capacitor. It operates at a constant switching frequency and the voltage conversion ratio is regulated by the phase-shift control. It has bi-directional power flow capability and synchronous rectification hence the on-state voltage drop of the devices are small. In addition, the newly developed converter is an ideal candidate for Electric Vehicle (EV), since its bi-directional power flow feature is especially useful for regenerative braking in EV, where the mechanical energy is converted into electrical energy by traction motor and then fed back into the batteries.

	A Generalized approach to Obtain the Steady-State Characteristics of DC/DC and DC/AC Resonant Converters By R.M. Lamaison-Urioste; A. Esquivel; J. Bordonau; J. Peracaula	[View] [Download]
Abstract: A generalized approach for the steady-state characteristics determination in high-order resonant DC/DC and DC/AC converters is presented. All topologies with 2 and 3 resonant elements, as well as many others up to 12 resonant elements are covered. Generalized ¡Ç and T networks and first harmonic approximation are used. In order to verify the relevance of the method a DC/DC LCC current source resonant converter with a nominal output power of 80 W and a resonant frequency of 250 kHz has been built and measured.

	A Novel Method for Optimising of Soft Switched Inverter with Quas... By V. Racek; R. Kristof; P. Flajnik	[View] [Download]
Abstract: An optimal design of resonant elements, switching strategy and selection of the switching devices for the presented inverter is treated in the paper. The method of optimizing the inverter is based on experimental and theoretical investigations of the components and the functionality of the inverter topology.

	A Novel Quasi-Resonant DC Link Inverter Using Coupled Inductors By M.D. Bagewadi; B.G. Fernandes; R.V.S. Subrahmanyam	[View] [Download]
Abstract: In this paper a novel quasi resonant DC link inverter using coupled inductors is proposed which pulls down the DC link voltage to zero for soft switching of inverter devices. The circuit uses a single switch in the quasi-resonant stage. In addition it has all advantages of many other QRDCL inverters like true PWM capability, snubberless and load independent operation. Various modes of operation are described with their equivalent circuits. The circuit is simulated using PSPICE and tested under all possible loading conditions.

	A ZCS Class-E Amplifier with a Capacitive Impedance Inverter Used as a Single-Stage High-Power-Factor Electronic Ballast for Fluorescent Lamps By M. Ponce; R. Vásquez; J. Arau; J. Marcos Alonso	[View] [Download]
Abstract: In this paper a Zero-Current-Switching (ZCS) class E-amplifier is proposed as fluorescent lamp ballast. The ZCS-class E-amplifier features lower voltage stress accross the switch than the Zero-Voltage-Switching (ZVS) class E amplifier. This is an important advantage which allow to supply the circuit from the American main voltage (Vac = 120 V), maintaining only one switch for the ballast. The operation and characteristics of the ZCS class E amplifier as electronic balast are analysed in this paper. The presented study includes selection of the more suitable resonant tank, power factor correction using the "modified valley fill" technique and parametric analysis of the ZCS class E amplifier.

	Analysis of Different Buck Topologies for VRM Applications By F. Gennaro; C. Cavallaro; A. Testa	[View] [Download]
Abstract: The demand of lower working voltage for data processing applications has been reqiering more efficient power converters due to the increased current level. The present trend is oriented to the VRM (Voltage Regulator Module) solution which allows to satisfy high performance specifications typical of the aforementioned applications. The evaluation of different configurations of Buck converters for low voltage applications is performed in order to choose a suitable converter configuration for a VRM core. The considered converters operate in hard and soft switching and are equiped with diode and synchronous output rectification. The comparison is made in terms of overall efficiency, power device stresses, electromagnetic emissions and converter sizes. Design guidelines are finally given in order to select the best topology accoring to the specific application.

	Comparison of PWM Operated Resonant DC-Voltage Link Inverters By G. Bachmann; P. Mutschler	[View] [Download]
Abstract: To improve the line and/or load side characteristics of medium to high power converters, it is desirable to increase their switching frequency. Additionally, it is advantageous to have a low dv/dt at the output voltages, especially when a motor is connected via a long cable to the inverter. Resonant converters claim to fulfil both items, because lower switching losses in the semiconductors should allow higher switching frequencies and the output voltage is shaped by the resonant operation. A lot of resonant topologies have been proposed, the Resonant Pole topology seems to be interesting for high power applications. In the range of medium power, which is the topic of this paper, the PWM-operated Resonant DC-Voltage Link Inverters may be favourable because they consist of clearly less individual parts. In this paper, the advantages and drawbacks of three different topologies are shown by analysing simulation results. An experimental set-up for one of the investigated inverters is under construction which will be used to examine the voltage and current stresses and the power dissipation of the active and passive components.

	Extensions of a new full-ZVS-range DC-DC Converter with Reduced Magnetics Requirement By R. Ayyanar; N. Mohan	[View] [Download]
Abstract: A novel hybrid soft-switching converter featuring zero-voltage-switching (ZVS) over the full load range and reduced filter requirement was proposed in [1,2]. In this paper the various topological variations of the hybrid converter are discussed. Specific applications, for which each of the variations is best suited, are indicated. Experimental and simulation results of the basic hybrid converter and some of its extensions are presented.

	High Precision and High Frequency Four Quadrant Power Converter (+/- 600A, +/- 12V) By P. Cussac; F. Bordry; A. Dupaquier	[View] [Download]
Abstract: The LHC (Large Hadron Collider) particle accelerator makes extensive use of true bipolar power converters. All these converters will be installed in excavated caverns underground; hence the necessity for minimum volume and high efficiency for the power converters. This paper presents the design and the realisation of a compact (19”,6U) and high frequency (50 kHz) four-quadrant power converter [±600 A, ±12 V]. The obtained performance (DC stability, efficiency, EMC,…) is presented and discussed.

	Insulated DC to DC ZVS Converter with Wide Input Voltage Range By O. Rieux; P. Ladoux; T. Meynard	[View] [Download]
Abstract: The authors have addressed the issue of DC to DC soft-switching insulated converters, with high input voltage and wide input voltage range. A new converter has been designed. Its topology and mode of operation are presented here.

	Modelling and Control Design Issues for the Modified Series Resonant Converter By S. V. Mollov; A. J. Forsyth	[View] [Download]
Abstract: The modelling and control of the Modified Series Resonant Converter (MSRC) is addressed. Using the fundamental frequency analysis, a model of the converter is derived, which is used to examine the system characteristics under both frequency and resonant current control. The performance and limitations of each control are described and the implications for the power circuit design are explored. Full supporting experimental results are included.

	New control design for a resonant DC-AC Converter By J.M. Hubé; D. Flieller; J.-P. Louis	[View] [Download]
Abstract: This paper presents command strategies for a serial DC-AC converter. They are based on the properties of a classical phase loop lock device, the CD4046. We develop a new command in which the output current is always in phase with the fundamental of the output tension. Small signal sampled-data models and linear models are set up and some experimental results are also shown in this paper.

	Resonant DC-AC Converter with Low Pulsed Output Voltage By D. Alexa; J. P. Six; A. Sirbu; L. Gitlan; A. Lazar	[View] [Download]
Abstract: The paper presents a new resonant DC link inverter that allows PWM capability and lower output overvoltages. This is obtained by keeping capacitor at a constant voltage, while the resonant circuit is continuously operated. the basic operating principle is discussed and the main advantages of the proposed circuit are commented. Detailed design-oriented analysis and relevant simulation results are also given.

	Soft Switching Converter and Switched Reluctance Motor By R. E. Hanitsch; L. G. B. Rolim	[View] [Download]
Abstract: The converter topology used for the switched reluctance drive system is a variation of the actively clamped resonant DC link converter (ACRDCL) /1/. A modification of the circuit was introduced which allows for applying a higher voltage on the phase windings during demagnetization. Beside the experimental work simulations were done. The proposed soft-switching SRM drive is capable of operation in current-controlled mode, with switching frequencies above audible region, with better efficiency and higher power density than a hardswitching SRM drive.

	Three phase current source soft switching PWM converter with a single resonant DC link snubber By M. Ishibashi; Y. Konishi; S. Mobin; H. Ogiwara; M. Nakaoka	[View] [Download]
Abstract: In this paper, a new prototype of three-phase current-fed zero current soft switching PWM converter using a single switched capacitor type resonant DC link (RDCL) circuit is described, which is operating by processing based the new conceptual optimum PWM pattern algorithm for efficient high-power utilization. The working principle, design approach as well as operating performances of this converter suitable for large capacity applications in industry and power systems are discussed herein from an experimental point of view. The effectiveness of this soft-switching optimum PWM converter with sinewave current shaping and unity power factor correction schemes is proved on the basis of experimental results.

	Three-phase rectifier with quasi-resonant DCL and a high power factor By H. Siebel; J. Pacas	[View] [Download]
Abstract: A new three-phase soft-switching rectifier is presented. The topology consists of a PWM boost converter with continuous input currents and an additional resonant branch, which provides low loss at high frequency operation. This leads to a high conversion efficiency and a remarkable reduction in the size of input inductor.

	Three-Phase Soft-Switching Inverter with Active Resonant Snubbers By H. Yamamoto; H. Ogiwara; H. Iwamoto; H. Hattori; M. Nakaoka	[View] [Download]
Abstract: In this paper, described is a practical design procedure for prototype of the auxiliary resonant commutated snubber circuit (ARCS) incorporating a current feedback transformer with power regeneration loop. For realization of three phase voltage-fed soft-switching inverter, soft-switching active power filter and reactive power compensator, This type of soft-switching power conversion topology has significant merit of effective and peak current rating reduction for auxiliary active switching devices in the ARCS. This paper also presents a novel version of digitally-controlled voltage source type space vector-modulated inverter with ARCS which can operate under a zero voltage soft-switching condition. The steady-state operating analysis of this ARCS has the remarkable features and the practical design procedure of this resonant snubber are illustrated on the basis of computer simulation analysis. The steady-state operating performance of this soft-switching inverter with ARCS are evaluated and discussed as compared with conventional three phase voltage source space vector modulated inverter operating at hard switching-transition mode.