EPE Association: EPE-PEMC 2004 - Topic 02-2: Power converter circuits and control

EPE-PEMC 2004 - Topic 02-2: Power converter circuits and control
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 02: POWER ELECTRONICS CONVERTERS > EPE-PEMC 2004 - Topic 02-2: Power converter circuits and control

   [return to parent folder]

   A Buck-Boost Chopper Having Multi-Output Configuration
By I. Yamamoto, K. Matsui, H. Mori [View]
[Download]

Abstract: For various electronic equipments including both analog and digital circuits, sometimes requires power supplies with different supply voltages. We propose a novel chopper, with simple circuit configuration, which can supply to two or more different output loads. This converter provides wide control output voltages by varying duty ratio using switching devices.

   A High-Power High-Frequency Mosfet Converter
By M. J. Case, H. C. V. Z. Pienaar [View]
[Download]

Abstract: There is apparently a limitation to the maximum frequency at which the MOSFET may operate. This paper shows that a power MOSFET may deliver 1 kW at least at 10 MHz. The class E amplifier circuit is used and a detailed analysis is presented.

   A New Zero-Voltage-Switching Phase-Shifted Pwm Full-Bridge Dc/dc Converter Using Auxiliary Resonant Net
By Tiecheng Sun, Yaxiu Sun, Bing Li [View]
[Download]

Abstract: In conventional phase-shifted zero-voltage-switching (ZVS) dc/dc converter, lagging leg loses ZVS capability under light load conditions, and output rectifier diodes operate with hard switching. A novel soft-switching bi-directional converter employing auxiliary resonant net is proposed to resolve these problems. To achieve higher power performance such as more powerful control ability, quick control speed and better reliability TMS320F240 DSP is used as control chip here. The flow and size of current is controlled by phased-shifted pulse-width-modulated in the converter. The novel converter can not only achieve soft switching but also eliminate the circulating current by adding an active-clamp circuit on the secondary side and using saturable inductor on the primary side. In result, soft-switching operating range is extended and all switches have ZVS conditions. Design and experiment result are presented.

   A Qualitative Analysis Of Non-Smooth Bifurcations Of Low -Frequency Oscillations In Pwm Boost Converter Using Averaging Approaches
By L. Benadero, V. Moreno [View]
[Download]

Abstract: Dynamics in pulse width modulated dc-dc converters can undergo several kinds of bifurcations and consequently different dynamics are likely to occur. Before Hopf bifurcation, the usual operating dynamics, that is, a cycle synchronised with the modulating signal (1-periodic orbit), can coexist with the quasiperiodic dynamics that tends to be a long and highamplitude cycle if the frequency of switching is increased. In this paper, averaged models are used to deal with bifurcations of these low-frequency oscillations, and the results are checked by simulation and experimentation.

   Application Of A Multi-Phase Step-Down Converter In Electric Traction
By Marek Kowalczewski, Wojciech Mysinski, Waldemar Zajac [View]
[Download]

Abstract: The launch of an integrated public transport system in large towns and surrounding areas (e.g. in Kraków and its conurbation) requires the railway network and tram network to be combined with a sufficient number of link points. The operation of such an integrated system will also require modern dual-system tramcars. As there is a difference in voltage between the two overhead supply systems, it is necessary to build a converter enabling tramcars to run on two different traction voltages, 3000VDC and 600VDC. This article sets out a proposed solution like that, based on a step-down multiphase converter. In addition, the article discusses the results of testing carried out on a low voltage laboratory model of a step-down multiphase converter that was designed and built to operate with a supply voltage of 300V, with a DC series motor designed for voltage of 48V/87A serving as load. Moreover, it is worth remembering that this article discusses the results of further research into power supplies for two-system trams and should be considered as a continuation of the work described in [6],[7].

   Application Of Matrix - Topology Methods For Modeling Of Transformer-Semiconductor Voltage Regulators With The Capacitor Smoothing Filter
By Kateryna Korotetskaya [View]
[Download]

Abstract: For the regulation of voltage of a supply network of alternating current devices with modulating regulation based on pulse-phase control of size of voltage addition of the booster transformer or the autotransformer are often applied. In this case various ways of reduction of nonsinusoidality of an output voltage are used.

   Comparison Of Three-Phase Rectifiers With Improved Emc With The Mains
By N. N. Lopatkin, G. S. Zinoviev, A. M. Zimin, H. Weiss [View]
[Download]

Abstract: The appearance of new standards on quality of electric energy in the West and in Russia has demanded new technical decisions for power converters. In this report results of the comparative analysis of a number of non-classical (active) rectifiers of a three-phase voltage are submitted at which the input power factor is approximately equal to unity.

   Constant Frequency Operation Of Contactless Electrical Energy Transmission System. Practical Results And Magnetic Field Calculations
By Robert Stala, Mariusz Stepien [View]
[Download]

Abstract: The paper presents practical results and ANSYS field calculations of converter for contactless electrical energy transmission. In the converter a transformer with separated core is applied to contactless energy transmission via magnetic field. A gap between parts of the core varies in a wide range. A capability of energy transferring by the 2U transformer versus air gap length0, and also efficiency, voltage ratio of the transformer with resisti0ve load was considered. In the converter a large leakage inductive reactances are compensated by capacitors connected in series to the transformer’s windings. Presented results concern mostly on impact of air gap variation on the phenomenon the core and on the system working near resonance state with constant frequency. For 2U and pot core type transformer, on the basis of ANSYS calculations of the equivalent circuit parameters, a simulation results for the contactless electrical energy transmission system has been realized.

   DC/DC Converter For Automotive Board-Net Structures
By Folker Renken, Volker Karrer [View]
[Download]

Abstract: For complex electrical board-net structures in motor vehicles DC/DC converters are used for the energy exchange. To make an economic and compact design possible the necessary effort with these converters must be determined carefully. In this paper the filter circuit effort for single-phase and multi-phase converters is calculated and compared to each other. At last, the calculations are proven by practical measurements

   Direct Voltage Control For Buck Converter
By Francisco J. Perez-Pinal, Ciro Nunez, Ricardo Alvarez [View]
[Download]

Abstract: Control of DC/DC converter has been discussed in Power Electronics and Control literature. Here, simple theoretical analysis and practical results are presented, which come into view as a novel way of Buck analysis by applying Direct Voltage Control. Simulation results during different test condition are shown.

   Improved Zero-Voltage And Zero-Current-Switching Pwm Converter Using Voltage Clamping
By Tiecheng Sun, Gaolin Wang, Lin Mei [View]
[Download]

Abstract: An improved zero-voltage and zero-current-switching (ZVZCS) full-bridge (FB) PWM bi-directional DC-DC converter employing modified voltage clamping circuit is proposed to alleviate voltage ringing and overshoot in secondary rectifier side due to resonance for conventional full-bridge ZVZCS DC-DC converter. The converter can achieve effective zero-voltage switching (ZVS) for leading-leg switches and zero-current switching (ZCS) for lagging-leg switches. It has advantages including without additional lossy components, lower switching losses, reduced conduction losses and bi-directional power flow. The operating principle and characteristics of the converter are analyzed. The proposed converter was verified by implementing an IGBT-based experimental circuit.

   Inverter Mode In Converter With Alternating Of Parallel And Series Resonance
By Kuno Janson, Jaan Jaervik, Jevgeni Shklovski, Toomas Vinnal [View]
[Download]

Abstract: Operation of line frequency thyristor converter with alternating parallel and series resonance in inverter mode with natural commutation is described. In case the converter operates in inverter mode only with the series resonance circuit or only with capacitive circuit the converter could be used both as single phase or three phase versions. The range of stable operation is described as well as the impact of dc side inductances to stable operation, also power factor and network current distortions.

   Kicker Converters For Fast Proton Beam Bending
By Rene Kuenzi, Mladen Horvat, Felix Jenni [View]
[Download]

Abstract: Two Magnet Power Supplies for fast and accurate beam bending, used in two proton accelerators, have been developed, built up and tested. This paper presents the requirements, the converter topology, the control principle and the results gained so far.

   Low Voltage Asymmetrical Half-Bridge Converter With Integrated Magnetics
By H. Wetzel, A. Siegel, H. D. Njiende, N. Froehleke, J. Boecker [View]
[Download]

Abstract: An Asymmetrical Half Bridge Converter (AHBC) with integrated magnetic components is presented in this contribution. After describing the circuit function, the design of an integrated magnetic current doubler component is discussed, supplemented by the derivation of an advanced average model of the AHBC. A prototype of the AHBC is built for a low voltage application of 1.7V rated output voltage at 20A rated output current, which represents the base for validation of theoretical results.

   Modular Converter System With Power Factor Correction (pfc) For Contactless Energy Transmission
By Christian Rathge, Rudolf Mecke [View]
[Download]

Abstract: An Asymmetrical Half Bridge Converter (AHBC) with integrated magnetic components is presented in this contribution. After describing the circuit function, the design of an integrated magnetic current doubler component is discussed, supplemented by the derivation of an advanced average model of the AHBC. A prototype of the AHBC is built for a low voltage application of 1.7V rated output voltage at 20A rated output current, which represents the base for validation of theoretical results.

   On Winding Design Of Planar Transformer For Miniaturized Megahertz Dc-Dc Converters
By Shangyang Xiao, Jingen Qian, Thomas Wu, Khai Ngo, Hua Zhou, Xiangcheng Wang, Hong Mao, Issa Batarseh [View]
[Download]

Abstract: This paper proposes a novel methodology to design winding structure for low-power high-density DC-DC converters at megahertz frequency range. The design is based on FEM electromagnetic simulations. Winding topologies have been studied and optimized design is obtained.

   Protection Strategies For Igbt Current Source Inverters
By M. Haberberger, F. W. Fuchs [View]
[Download]

Abstract: An overview of overcurrent and overvoltage CSI faults is presented and strategies, how to protect a CSI equipped with IGBT power switches against these failures are developed and explained. The shown strategies and the related circuits are applicable at low expense and require only minor changes in the CSI and its control.

   Quasiperiodic Oscillations In A Dc/dc Converter With Relay Feedback Control
By Zh. T. Zhusubaliyev, E. A. Soukhoterin [View]
[Download]

Abstract: We study bifurcational mechanisms for arising of quasiperiodic oscillations in a DC/DC converter with relay feedback control. Structure of resonance tongues and bifurcations on a two-dimensional torus are studied in detail. We will show that the resonant cycle loses its stability via perioddoubling bifurcation and further transition to chaos takes place through infinite sequence of period-doublings.

   Single Phase Inverters With Multilevel Amplitude. Application In Contactless Electrical Energy Transmission System
By Stanislav Pirog, Robert Stala [View]
[Download]

Abstract: The paper presents the concept of a single phase inverter with multilevel amplitude applied in a contactless electrical energy transmission system. In presented inverters output voltage can have at least two levels of amplitude. This solution enables power losses minimization in idle or standby working mode, and also gives great improvements in dynamical states of the system. Results of contribution of those inverters with the contactless electrical energy transmission system in dynamical and steady states are presented.

   Stability Study Of Active-Clamp Forward Converters
By Masahito Jinno(tw), Chao-Han Wu(tw), Po-Yuan Chen(tw), Tamotsu Ninomiya(jp) [View]
[Download]

Abstract: This paper discusses the effect on the dynamic characteristics of a forward converter caused by the existence of an active-clamp circuit. By using the state-space averaged analysis, the steady-state characteristics and the dynamic small-signal model of this circuit can be obtained. Accordingly, the effect of the clamp capacitance on the stability of this active-clamp forward converter can be investigated. From the characteristic equation, it is clarified that the clamp capacitance has no effect on the stability of the active-clamp forward converter. The experimental results agree well with the theoretical derivation.

   SVM Voltage Control Implementation Using Low-Cost Reconfigurable Fpga System
By Joao Ferreira, Joao Martins [View]
[Download]

Abstract: This paper describes a full VHDL implementation of a voltage Space-Vector Modulation in a FPGA reconfigurable system. A VHDL code was specially developed and optimized based on a finite state machine, which has been proven a more flexible and integrated environment for performing the SVM. A FPGA XC4005XL from Xilinx is used to allow a high economical solution. MATLAB functions automatically optimize and generate a configuration bitstream for the FPGA. Experimental results confirm the validity of the proposed methodology.

   Switching Loss Evaluation Of Active Gate Controlled Igbt
By Hiromichi Tai, Makoto Takeda, Toshiaki Matsumoto [View]
[Download]

Abstract: This paper presents a simple active gate control circuit for high-voltage IGBTs. By using active gate control technique, IGBT can control voltage surge by itself without snubber circuit. Therefore active gate control can realize snubberless main circuit even for high-voltage series connected converters. On the other hand, active gate control has the problem of switching loss of IGBT. Because the switching loss consumed by snubber circuit will be consumed by IGBT in snubberless main circuit. In this paper, the relation between turn-off switching loss, dVce/dt and Rgoff is discussed. Experimental results present good controllability of proposed gate control circuit.

EPE-PEMC 2004 - Topic 02-2: Power converter circuits and control
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 02: POWER ELECTRONICS CONVERTERS > EPE-PEMC 2004 - Topic 02-2: Power converter circuits and control
	[return to parent folder]

	A Buck-Boost Chopper Having Multi-Output Configuration By I. Yamamoto, K. Matsui, H. Mori	[View] [Download]
Abstract: For various electronic equipments including both analog and digital circuits, sometimes requires power supplies with different supply voltages. We propose a novel chopper, with simple circuit configuration, which can supply to two or more different output loads. This converter provides wide control output voltages by varying duty ratio using switching devices.

	A High-Power High-Frequency Mosfet Converter By M. J. Case, H. C. V. Z. Pienaar	[View] [Download]
Abstract: There is apparently a limitation to the maximum frequency at which the MOSFET may operate. This paper shows that a power MOSFET may deliver 1 kW at least at 10 MHz. The class E amplifier circuit is used and a detailed analysis is presented.

	A New Zero-Voltage-Switching Phase-Shifted Pwm Full-Bridge Dc/dc Converter Using Auxiliary Resonant Net By Tiecheng Sun, Yaxiu Sun, Bing Li	[View] [Download]
Abstract: In conventional phase-shifted zero-voltage-switching (ZVS) dc/dc converter, lagging leg loses ZVS capability under light load conditions, and output rectifier diodes operate with hard switching. A novel soft-switching bi-directional converter employing auxiliary resonant net is proposed to resolve these problems. To achieve higher power performance such as more powerful control ability, quick control speed and better reliability TMS320F240 DSP is used as control chip here. The flow and size of current is controlled by phased-shifted pulse-width-modulated in the converter. The novel converter can not only achieve soft switching but also eliminate the circulating current by adding an active-clamp circuit on the secondary side and using saturable inductor on the primary side. In result, soft-switching operating range is extended and all switches have ZVS conditions. Design and experiment result are presented.

	A Qualitative Analysis Of Non-Smooth Bifurcations Of Low -Frequency Oscillations In Pwm Boost Converter Using Averaging Approaches By L. Benadero, V. Moreno	[View] [Download]
Abstract: Dynamics in pulse width modulated dc-dc converters can undergo several kinds of bifurcations and consequently different dynamics are likely to occur. Before Hopf bifurcation, the usual operating dynamics, that is, a cycle synchronised with the modulating signal (1-periodic orbit), can coexist with the quasiperiodic dynamics that tends to be a long and highamplitude cycle if the frequency of switching is increased. In this paper, averaged models are used to deal with bifurcations of these low-frequency oscillations, and the results are checked by simulation and experimentation.

	Application Of A Multi-Phase Step-Down Converter In Electric Traction By Marek Kowalczewski, Wojciech Mysinski, Waldemar Zajac	[View] [Download]
Abstract: The launch of an integrated public transport system in large towns and surrounding areas (e.g. in Kraków and its conurbation) requires the railway network and tram network to be combined with a sufficient number of link points. The operation of such an integrated system will also require modern dual-system tramcars. As there is a difference in voltage between the two overhead supply systems, it is necessary to build a converter enabling tramcars to run on two different traction voltages, 3000VDC and 600VDC. This article sets out a proposed solution like that, based on a step-down multiphase converter. In addition, the article discusses the results of testing carried out on a low voltage laboratory model of a step-down multiphase converter that was designed and built to operate with a supply voltage of 300V, with a DC series motor designed for voltage of 48V/87A serving as load. Moreover, it is worth remembering that this article discusses the results of further research into power supplies for two-system trams and should be considered as a continuation of the work described in [6],[7].

	Application Of Matrix - Topology Methods For Modeling Of Transformer-Semiconductor Voltage Regulators With The Capacitor Smoothing Filter By Kateryna Korotetskaya	[View] [Download]
Abstract: For the regulation of voltage of a supply network of alternating current devices with modulating regulation based on pulse-phase control of size of voltage addition of the booster transformer or the autotransformer are often applied. In this case various ways of reduction of nonsinusoidality of an output voltage are used.

	Comparison Of Three-Phase Rectifiers With Improved Emc With The Mains By N. N. Lopatkin, G. S. Zinoviev, A. M. Zimin, H. Weiss	[View] [Download]
Abstract: The appearance of new standards on quality of electric energy in the West and in Russia has demanded new technical decisions for power converters. In this report results of the comparative analysis of a number of non-classical (active) rectifiers of a three-phase voltage are submitted at which the input power factor is approximately equal to unity.

	Constant Frequency Operation Of Contactless Electrical Energy Transmission System. Practical Results And Magnetic Field Calculations By Robert Stala, Mariusz Stepien	[View] [Download]
Abstract: The paper presents practical results and ANSYS field calculations of converter for contactless electrical energy transmission. In the converter a transformer with separated core is applied to contactless energy transmission via magnetic field. A gap between parts of the core varies in a wide range. A capability of energy transferring by the 2U transformer versus air gap length0, and also efficiency, voltage ratio of the transformer with resisti0ve load was considered. In the converter a large leakage inductive reactances are compensated by capacitors connected in series to the transformer’s windings. Presented results concern mostly on impact of air gap variation on the phenomenon the core and on the system working near resonance state with constant frequency. For 2U and pot core type transformer, on the basis of ANSYS calculations of the equivalent circuit parameters, a simulation results for the contactless electrical energy transmission system has been realized.

	DC/DC Converter For Automotive Board-Net Structures By Folker Renken, Volker Karrer	[View] [Download]
Abstract: For complex electrical board-net structures in motor vehicles DC/DC converters are used for the energy exchange. To make an economic and compact design possible the necessary effort with these converters must be determined carefully. In this paper the filter circuit effort for single-phase and multi-phase converters is calculated and compared to each other. At last, the calculations are proven by practical measurements

	Direct Voltage Control For Buck Converter By Francisco J. Perez-Pinal, Ciro Nunez, Ricardo Alvarez	[View] [Download]
Abstract: Control of DC/DC converter has been discussed in Power Electronics and Control literature. Here, simple theoretical analysis and practical results are presented, which come into view as a novel way of Buck analysis by applying Direct Voltage Control. Simulation results during different test condition are shown.

	Improved Zero-Voltage And Zero-Current-Switching Pwm Converter Using Voltage Clamping By Tiecheng Sun, Gaolin Wang, Lin Mei	[View] [Download]
Abstract: An improved zero-voltage and zero-current-switching (ZVZCS) full-bridge (FB) PWM bi-directional DC-DC converter employing modified voltage clamping circuit is proposed to alleviate voltage ringing and overshoot in secondary rectifier side due to resonance for conventional full-bridge ZVZCS DC-DC converter. The converter can achieve effective zero-voltage switching (ZVS) for leading-leg switches and zero-current switching (ZCS) for lagging-leg switches. It has advantages including without additional lossy components, lower switching losses, reduced conduction losses and bi-directional power flow. The operating principle and characteristics of the converter are analyzed. The proposed converter was verified by implementing an IGBT-based experimental circuit.

	Inverter Mode In Converter With Alternating Of Parallel And Series Resonance By Kuno Janson, Jaan Jaervik, Jevgeni Shklovski, Toomas Vinnal	[View] [Download]
Abstract: Operation of line frequency thyristor converter with alternating parallel and series resonance in inverter mode with natural commutation is described. In case the converter operates in inverter mode only with the series resonance circuit or only with capacitive circuit the converter could be used both as single phase or three phase versions. The range of stable operation is described as well as the impact of dc side inductances to stable operation, also power factor and network current distortions.

	Kicker Converters For Fast Proton Beam Bending By Rene Kuenzi, Mladen Horvat, Felix Jenni	[View] [Download]
Abstract: Two Magnet Power Supplies for fast and accurate beam bending, used in two proton accelerators, have been developed, built up and tested. This paper presents the requirements, the converter topology, the control principle and the results gained so far.

	Low Voltage Asymmetrical Half-Bridge Converter With Integrated Magnetics By H. Wetzel, A. Siegel, H. D. Njiende, N. Froehleke, J. Boecker	[View] [Download]
Abstract: An Asymmetrical Half Bridge Converter (AHBC) with integrated magnetic components is presented in this contribution. After describing the circuit function, the design of an integrated magnetic current doubler component is discussed, supplemented by the derivation of an advanced average model of the AHBC. A prototype of the AHBC is built for a low voltage application of 1.7V rated output voltage at 20A rated output current, which represents the base for validation of theoretical results.

	Modular Converter System With Power Factor Correction (pfc) For Contactless Energy Transmission By Christian Rathge, Rudolf Mecke	[View] [Download]
Abstract: An Asymmetrical Half Bridge Converter (AHBC) with integrated magnetic components is presented in this contribution. After describing the circuit function, the design of an integrated magnetic current doubler component is discussed, supplemented by the derivation of an advanced average model of the AHBC. A prototype of the AHBC is built for a low voltage application of 1.7V rated output voltage at 20A rated output current, which represents the base for validation of theoretical results.

	On Winding Design Of Planar Transformer For Miniaturized Megahertz Dc-Dc Converters By Shangyang Xiao, Jingen Qian, Thomas Wu, Khai Ngo, Hua Zhou, Xiangcheng Wang, Hong Mao, Issa Batarseh	[View] [Download]
Abstract: This paper proposes a novel methodology to design winding structure for low-power high-density DC-DC converters at megahertz frequency range. The design is based on FEM electromagnetic simulations. Winding topologies have been studied and optimized design is obtained.

	Protection Strategies For Igbt Current Source Inverters By M. Haberberger, F. W. Fuchs	[View] [Download]
Abstract: An overview of overcurrent and overvoltage CSI faults is presented and strategies, how to protect a CSI equipped with IGBT power switches against these failures are developed and explained. The shown strategies and the related circuits are applicable at low expense and require only minor changes in the CSI and its control.

	Quasiperiodic Oscillations In A Dc/dc Converter With Relay Feedback Control By Zh. T. Zhusubaliyev, E. A. Soukhoterin	[View] [Download]
Abstract: We study bifurcational mechanisms for arising of quasiperiodic oscillations in a DC/DC converter with relay feedback control. Structure of resonance tongues and bifurcations on a two-dimensional torus are studied in detail. We will show that the resonant cycle loses its stability via perioddoubling bifurcation and further transition to chaos takes place through infinite sequence of period-doublings.

	Single Phase Inverters With Multilevel Amplitude. Application In Contactless Electrical Energy Transmission System By Stanislav Pirog, Robert Stala	[View] [Download]
Abstract: The paper presents the concept of a single phase inverter with multilevel amplitude applied in a contactless electrical energy transmission system. In presented inverters output voltage can have at least two levels of amplitude. This solution enables power losses minimization in idle or standby working mode, and also gives great improvements in dynamical states of the system. Results of contribution of those inverters with the contactless electrical energy transmission system in dynamical and steady states are presented.

	Stability Study Of Active-Clamp Forward Converters By Masahito Jinno(tw), Chao-Han Wu(tw), Po-Yuan Chen(tw), Tamotsu Ninomiya(jp)	[View] [Download]
Abstract: This paper discusses the effect on the dynamic characteristics of a forward converter caused by the existence of an active-clamp circuit. By using the state-space averaged analysis, the steady-state characteristics and the dynamic small-signal model of this circuit can be obtained. Accordingly, the effect of the clamp capacitance on the stability of this active-clamp forward converter can be investigated. From the characteristic equation, it is clarified that the clamp capacitance has no effect on the stability of the active-clamp forward converter. The experimental results agree well with the theoretical derivation.

	SVM Voltage Control Implementation Using Low-Cost Reconfigurable Fpga System By Joao Ferreira, Joao Martins	[View] [Download]
Abstract: This paper describes a full VHDL implementation of a voltage Space-Vector Modulation in a FPGA reconfigurable system. A VHDL code was specially developed and optimized based on a finite state machine, which has been proven a more flexible and integrated environment for performing the SVM. A FPGA XC4005XL from Xilinx is used to allow a high economical solution. MATLAB functions automatically optimize and generate a configuration bitstream for the FPGA. Experimental results confirm the validity of the proposed methodology.

	Switching Loss Evaluation Of Active Gate Controlled Igbt By Hiromichi Tai, Makoto Takeda, Toshiaki Matsumoto	[View] [Download]
Abstract: This paper presents a simple active gate control circuit for high-voltage IGBTs. By using active gate control technique, IGBT can control voltage surge by itself without snubber circuit. Therefore active gate control can realize snubberless main circuit even for high-voltage series connected converters. On the other hand, active gate control has the problem of switching loss of IGBT. Because the switching loss consumed by snubber circuit will be consumed by IGBT in snubberless main circuit. In this paper, the relation between turn-off switching loss, dVce/dt and Rgoff is discussed. Experimental results present good controllability of proposed gate control circuit.