EPE Association: Pelincec 2005 - 18: Dialog II - DC-DC Converters and Devices

Pelincec 2005 - 18: Dialog II - DC-DC Converters and Devices
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > Pelincec 2005 > Pelincec 2005 - 18: Dialog II - DC-DC Converters and Devices

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   BI-DIRECTIONAL, HIGH EFFICIENT DC/DC CONVERTER FOR EV APPLICATION
By Jozef Lastowiecki, A. Witkowski, S. Ryzko [View]
[Download]

Abstract: Electrically driven vehicles (EV) need very high efficient power electronic devices. The most important is a bi-directional DC/DC converter applied between higher voltage side with fuel cell and lower voltage side with vehicle battery. Study of such converter efficiency is carried out in the paper. Especially influence of leakage inductance of high frequency transformer on power transmission effectiveness has been analyzed. Some simulation and experimental results of bi-directional DC/DC converter, which has been build, are presented.

   A Novel FB ZVZCS PWM DC-DC Converter Based on DSP Control
By Tiecheng Sun, Xueguang Zhang, Gaolin Wang [View]
[Download]

Abstract: An improved FB ZVZCS (full-bridge zero-voltage and zero-current-switching) PWM DC-DC converter with passive voltage clamping was proposed and the operating principle and soft-switching condition of the proposed converter is analyzed in detail. The topology improves the performance of the converter by widening the load range for soft switching, decreasing additional losses for auxiliary resonant circuit. The digital control system was designed using TMS320F240 DSP chip. A prototype has verified the principle and characteristics of the proposed soft-switching converter based on digital control.

   The resonant DC/AC and DC/DC boost converter
By Stanislaw Jalbrzykowski, Tadeusz Citko [View]
[Download]

Abstract: The converter system with parallel resonant circuit feed by a current converter is presented in the article. Because of its characteristic properties, this system is a typical “boost” converter. The analytical investigation based on the first harmonic component is presented and confirmed by PSIPICE simulations and laboratory model investigations.

   A three-level non-isolated bi-directional DC-DC converter designed to control 50kW ultracapacitor tanks
By Ming Yu, Zhonghua Liang , Beikai Zeng [View]
[Download]

Abstract: the paper introduces a three level (TL) non-isolated bi-directional DC-DC converter to control charge and discharge of the ultracapacitor tanks (UCT), which are used as accessorial power supply of an electric vehicle (EV) propulsion system. The principle of circuit operation of the proposed converter is described in detail with mathematical analysis. The relationship between the duty cycle of the power devices in the DC-DC converter and the ratio of the input voltage and the output voltage of the converter is given and simulation results are presented to verify the concept.

   Bidirectional DC-DC Half-Bridge Converter with the Possibility of Zero Voltage Switching and Reduced Current Stress of the Inductors
By Felix. A. Himmelstoss; Eduard J. Wimmer [View]
[Download]

Abstract: A survey of important data (maximum voltage and current ratings for the elements, rms values for the semiconductor devices and a rough approximation of the losses) of a half-bridge bidirectional DC/DC buck converter is given. The converter shows non-pulsating input and output currents. A realistic converter model is derived. The transfer function for output voltage depending on the duty cycle and the transfer function for the inductor current for coupling two voltage sources are calculated with the help of signal flow graphs and the function of a zero voltage switching concept is explained.

   Buck-boost converter for universal-input PFC applications
By Dorin Cismasiu [View]
[Download]

Abstract: In converters for power-factor-correction (PFC), universal-input capability (ability to operate from any AC line voltage, world-wide) comes with a heavy price in terms of component stresses and losses, size of components, and restrictions on the output DC voltage. A two-switch topology proposed by Jingquan Chen, Dragan Maksimovic and Robert Erikson offer very significant performance improvements over the single-switch buck-boost converters (including flyback, SEPIC, and Cuk topologies) and conventional two-switch buck-boost cascaded converters. The proposed converter has buck-boost conversion characteristic, switch conduction losses comparable to the boost converter, no inrush current problem, and potential for smaller inductor size compared to the boost converter.

   Reduced Switching in Randomized Schemes for DC-DC Power Conversion
By S. Sathiakumar, Y. Shrivastava, Y.S. Lee [View]
[Download]

Abstract: Random switching schemes for power conversion are expected to reduce annoying electromagnetic interference and acoustic noise caused by switching. This is achieved by spreading the spectrum of the switching waveforms in different random schemes reported in the literature and as a result the output characteristics of the converter are altered differently. A comparative study of random pulse width modulated schemes for DC-DC power converter is presented in this paper. The spectral performance of four random schemes for the DC-DC power conversion is studied and their relative merits and demerits are highlighted. A method to reduce the average switching frequency of the random schemes without significantly affecting the output characteristics of the converter is also proposed. The random schemes discussed as well as the proposed schemes are implemented using a laboratory setup with a buck converter driven by the DSP TMS320C240 and the experimental results are presented comparing the performance of different schemes.

   Fuzzy Logic Controller with Limited Number of Control Rules for DC/DC Converters
By Miroslaw Krol, Wlodzimierz Koczara [View]
[Download]

Abstract: General purpose fuzzy logic controllers for dc/dc converters provide good performance. However to guarantee acceptable signal response they require large amount of control rules and fuzzy sets. This fact makes that kind of controllers hard to implement, even on microprocessor based systems. This paper proposes fuzzy logic controller structure for dc/dc converters with limited number of control rules, number of sets and membership functions. Simulation results are provided for buck and boost dc/dc converters cases with three and more conversion ratios, in order to investigate performance of proposed FLC structure.

   Deadbeat Control for Single Phase PWM Inverter using FPGA based Hardware Controller
By Michal Borkowski, Lukasz Dragan, Bartlomiej Kamiñski, Wlodzimierz Koczara [View]
[Download]

Abstract: This paper presents hardware implementation of digital control in an FPGA chip. The proposed solution leads to an SoC (System on Chip) idea, where all components of a control system are integrated into a single chip. Algorithm based on deadbeat control was especially chosen for this project. This digital control has following advantages: location of system poles at the origin assure very fast system response, assignment of gain matrix is defined by the deadbeat equation. The controller, except from the main deadbeat regulator, includes state estimator and disturbance observer. Experimental results are included to show the validity of the proposed method.

   Automated Testing of Power Semiconductor Devices
By Sven Tschirley, Steffen Bernet [View]
[Download]

Abstract: Testing power semiconductor devices for a new product design or a qualification in the development process is nescessary to ensure a good device utilization. Benchmarking devices and verification of datasheet specifications cause high cost in the pre-design phase of new products. This paper describes the design of a test system that enables automated testing of modern power semiconductor devices. Examples are given by measuring and calculating the turn-off losses of the 10 kV IGCT.

   A regenerative, passive snubber design for industrial IGBT power modules
By Stanislaw Kalisiak, Marcin Holub [View]
[Download]

Abstract: Paper deals with a novel, passive snubber topology suitable for modern, IGBT power modules for both chopper and half-bridge based designs. The exclusive circuit topology exhibits a unique property of the switching energy recovery. It’s compact design and passive construction makes it an interesting alternative to existing, classical snubber designs for modern, industrial, IGBT power modules. Three different circuit topologies are discussed exhibiting slightly different properties. Theoretical and simulation analyses are presented, test measurement results and waveforms are summarized.

   Comparison of power semiconductor utilization and losses of 2.3 KV, 3.3 KV and 4.16 KV Neutral-Point-Clamped and Series Connected H-Bridge Multi-Level Converter
By Seyed Saeed Fazel; Dietmar Krug; Steffen Bernet [View]
[Download]

Abstract: This paper describes the Three-Level Neutral Point Clamped Voltage Source Converter (3L-NPC VSC) and the Series Connected H-Bridge Voltage Source Converter (5L-SCHB VSC, 7L-SCHB VSC and 9L-SCHB VSC) on the basis of the state-of-the-art 1.7kV, 3.3kV, 4.5kV and 6.5 kV IGBTs for 2.3 kV, 3.3 kV and 4.16 kV medium voltage converters. The selection of the power semiconductors, the expense of active components, the installed switch power, converter losses and their distribution, modulation strategies and the harmonic spectra will be compared in detail.

   Study on Wireless Energy Transmission Systems Using Inductive Coupling
By Artur Moradewicz [View]
[Download]

Abstract: The conventional method of connecting the electrical domestic or industry equipment to the power supply based on the team plug – socked. However in many technical applications we have to transfer the power through the joints or use the electrical units in dangerous atmosphere or in rough working conditions, where eliminations the risk of electrical shocks and sparking is required This paper describes the theoretical analysis of wireless energy transmission system WETS, build on the two halves cores transformer where any halve have own windings. The mathematical model combined the primary and secondary side is developed and the total impedance seen by the power supply is described.

   A Semiconductor-Marx Surge Voltage Generator
By Stanislaw Kalisiak; Marcin Holub [View]
[Download]

Abstract: The paper deals with a surge voltage generator design compliant with the telecommunication equipment, surge test measurement routines. The operation is based on the Marx generator principle [1], however the system is fully semiconductor based. It includes a charging, switch mode power supply and an exclusive, thyristor surge discharge unit. Simulation and practical test results are presented and discussed.

   Features of a single-phase Z-source inverter
By Jacek Rabkowski, Roman Barlik, Mieczyslaw Nowak [View]
[Download]

Abstract: Recently proposed Z-source inverter, based on typical Voltage Source Inverter (VSI) switches topology and special Z network, is able to boost variable DC voltage to supply AC loads. This feature is very suitable in renewable energy systems (fuel cells, solar stacks) and other applications where in-directional DC/AC step-up conversion is required. In power range up to several kW a single-phase system is preferred. The paper shows features of single-phase Z source inverter on the base of simulation tests and laboratory investigations of the low power laboratory model.

Pelincec 2005 - 18: Dialog II - DC-DC Converters and Devices
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > Pelincec 2005 > Pelincec 2005 - 18: Dialog II - DC-DC Converters and Devices
	[return to parent folder]

	BI-DIRECTIONAL, HIGH EFFICIENT DC/DC CONVERTER FOR EV APPLICATION By Jozef Lastowiecki, A. Witkowski, S. Ryzko	[View] [Download]
Abstract: Electrically driven vehicles (EV) need very high efficient power electronic devices. The most important is a bi-directional DC/DC converter applied between higher voltage side with fuel cell and lower voltage side with vehicle battery. Study of such converter efficiency is carried out in the paper. Especially influence of leakage inductance of high frequency transformer on power transmission effectiveness has been analyzed. Some simulation and experimental results of bi-directional DC/DC converter, which has been build, are presented.

	A Novel FB ZVZCS PWM DC-DC Converter Based on DSP Control By Tiecheng Sun, Xueguang Zhang, Gaolin Wang	[View] [Download]
Abstract: An improved FB ZVZCS (full-bridge zero-voltage and zero-current-switching) PWM DC-DC converter with passive voltage clamping was proposed and the operating principle and soft-switching condition of the proposed converter is analyzed in detail. The topology improves the performance of the converter by widening the load range for soft switching, decreasing additional losses for auxiliary resonant circuit. The digital control system was designed using TMS320F240 DSP chip. A prototype has verified the principle and characteristics of the proposed soft-switching converter based on digital control.

	The resonant DC/AC and DC/DC boost converter By Stanislaw Jalbrzykowski, Tadeusz Citko	[View] [Download]
Abstract: The converter system with parallel resonant circuit feed by a current converter is presented in the article. Because of its characteristic properties, this system is a typical “boost” converter. The analytical investigation based on the first harmonic component is presented and confirmed by PSIPICE simulations and laboratory model investigations.

	A three-level non-isolated bi-directional DC-DC converter designed to control 50kW ultracapacitor tanks By Ming Yu, Zhonghua Liang , Beikai Zeng	[View] [Download]
Abstract: the paper introduces a three level (TL) non-isolated bi-directional DC-DC converter to control charge and discharge of the ultracapacitor tanks (UCT), which are used as accessorial power supply of an electric vehicle (EV) propulsion system. The principle of circuit operation of the proposed converter is described in detail with mathematical analysis. The relationship between the duty cycle of the power devices in the DC-DC converter and the ratio of the input voltage and the output voltage of the converter is given and simulation results are presented to verify the concept.

	Bidirectional DC-DC Half-Bridge Converter with the Possibility of Zero Voltage Switching and Reduced Current Stress of the Inductors By Felix. A. Himmelstoss; Eduard J. Wimmer	[View] [Download]
Abstract: A survey of important data (maximum voltage and current ratings for the elements, rms values for the semiconductor devices and a rough approximation of the losses) of a half-bridge bidirectional DC/DC buck converter is given. The converter shows non-pulsating input and output currents. A realistic converter model is derived. The transfer function for output voltage depending on the duty cycle and the transfer function for the inductor current for coupling two voltage sources are calculated with the help of signal flow graphs and the function of a zero voltage switching concept is explained.

	Buck-boost converter for universal-input PFC applications By Dorin Cismasiu	[View] [Download]
Abstract: In converters for power-factor-correction (PFC), universal-input capability (ability to operate from any AC line voltage, world-wide) comes with a heavy price in terms of component stresses and losses, size of components, and restrictions on the output DC voltage. A two-switch topology proposed by Jingquan Chen, Dragan Maksimovic and Robert Erikson offer very significant performance improvements over the single-switch buck-boost converters (including flyback, SEPIC, and Cuk topologies) and conventional two-switch buck-boost cascaded converters. The proposed converter has buck-boost conversion characteristic, switch conduction losses comparable to the boost converter, no inrush current problem, and potential for smaller inductor size compared to the boost converter.

	Reduced Switching in Randomized Schemes for DC-DC Power Conversion By S. Sathiakumar, Y. Shrivastava, Y.S. Lee	[View] [Download]
Abstract: Random switching schemes for power conversion are expected to reduce annoying electromagnetic interference and acoustic noise caused by switching. This is achieved by spreading the spectrum of the switching waveforms in different random schemes reported in the literature and as a result the output characteristics of the converter are altered differently. A comparative study of random pulse width modulated schemes for DC-DC power converter is presented in this paper. The spectral performance of four random schemes for the DC-DC power conversion is studied and their relative merits and demerits are highlighted. A method to reduce the average switching frequency of the random schemes without significantly affecting the output characteristics of the converter is also proposed. The random schemes discussed as well as the proposed schemes are implemented using a laboratory setup with a buck converter driven by the DSP TMS320C240 and the experimental results are presented comparing the performance of different schemes.

	Fuzzy Logic Controller with Limited Number of Control Rules for DC/DC Converters By Miroslaw Krol, Wlodzimierz Koczara	[View] [Download]
Abstract: General purpose fuzzy logic controllers for dc/dc converters provide good performance. However to guarantee acceptable signal response they require large amount of control rules and fuzzy sets. This fact makes that kind of controllers hard to implement, even on microprocessor based systems. This paper proposes fuzzy logic controller structure for dc/dc converters with limited number of control rules, number of sets and membership functions. Simulation results are provided for buck and boost dc/dc converters cases with three and more conversion ratios, in order to investigate performance of proposed FLC structure.

	Deadbeat Control for Single Phase PWM Inverter using FPGA based Hardware Controller By Michal Borkowski, Lukasz Dragan, Bartlomiej Kamiñski, Wlodzimierz Koczara	[View] [Download]
Abstract: This paper presents hardware implementation of digital control in an FPGA chip. The proposed solution leads to an SoC (System on Chip) idea, where all components of a control system are integrated into a single chip. Algorithm based on deadbeat control was especially chosen for this project. This digital control has following advantages: location of system poles at the origin assure very fast system response, assignment of gain matrix is defined by the deadbeat equation. The controller, except from the main deadbeat regulator, includes state estimator and disturbance observer. Experimental results are included to show the validity of the proposed method.

	Automated Testing of Power Semiconductor Devices By Sven Tschirley, Steffen Bernet	[View] [Download]
Abstract: Testing power semiconductor devices for a new product design or a qualification in the development process is nescessary to ensure a good device utilization. Benchmarking devices and verification of datasheet specifications cause high cost in the pre-design phase of new products. This paper describes the design of a test system that enables automated testing of modern power semiconductor devices. Examples are given by measuring and calculating the turn-off losses of the 10 kV IGCT.

	A regenerative, passive snubber design for industrial IGBT power modules By Stanislaw Kalisiak, Marcin Holub	[View] [Download]
Abstract: Paper deals with a novel, passive snubber topology suitable for modern, IGBT power modules for both chopper and half-bridge based designs. The exclusive circuit topology exhibits a unique property of the switching energy recovery. It’s compact design and passive construction makes it an interesting alternative to existing, classical snubber designs for modern, industrial, IGBT power modules. Three different circuit topologies are discussed exhibiting slightly different properties. Theoretical and simulation analyses are presented, test measurement results and waveforms are summarized.

	Comparison of power semiconductor utilization and losses of 2.3 KV, 3.3 KV and 4.16 KV Neutral-Point-Clamped and Series Connected H-Bridge Multi-Level Converter By Seyed Saeed Fazel; Dietmar Krug; Steffen Bernet	[View] [Download]
Abstract: This paper describes the Three-Level Neutral Point Clamped Voltage Source Converter (3L-NPC VSC) and the Series Connected H-Bridge Voltage Source Converter (5L-SCHB VSC, 7L-SCHB VSC and 9L-SCHB VSC) on the basis of the state-of-the-art 1.7kV, 3.3kV, 4.5kV and 6.5 kV IGBTs for 2.3 kV, 3.3 kV and 4.16 kV medium voltage converters. The selection of the power semiconductors, the expense of active components, the installed switch power, converter losses and their distribution, modulation strategies and the harmonic spectra will be compared in detail.

	Study on Wireless Energy Transmission Systems Using Inductive Coupling By Artur Moradewicz	[View] [Download]
Abstract: The conventional method of connecting the electrical domestic or industry equipment to the power supply based on the team plug – socked. However in many technical applications we have to transfer the power through the joints or use the electrical units in dangerous atmosphere or in rough working conditions, where eliminations the risk of electrical shocks and sparking is required This paper describes the theoretical analysis of wireless energy transmission system WETS, build on the two halves cores transformer where any halve have own windings. The mathematical model combined the primary and secondary side is developed and the total impedance seen by the power supply is described.

	A Semiconductor-Marx Surge Voltage Generator By Stanislaw Kalisiak; Marcin Holub	[View] [Download]
Abstract: The paper deals with a surge voltage generator design compliant with the telecommunication equipment, surge test measurement routines. The operation is based on the Marx generator principle [1], however the system is fully semiconductor based. It includes a charging, switch mode power supply and an exclusive, thyristor surge discharge unit. Simulation and practical test results are presented and discussed.

	Features of a single-phase Z-source inverter By Jacek Rabkowski, Roman Barlik, Mieczyslaw Nowak	[View] [Download]
Abstract: Recently proposed Z-source inverter, based on typical Voltage Source Inverter (VSI) switches topology and special Z network, is able to boost variable DC voltage to supply AC loads. This feature is very suitable in renewable energy systems (fuel cells, solar stacks) and other applications where in-directional DC/AC step-up conversion is required. In power range up to several kW a single-phase system is preferred. The paper shows features of single-phase Z source inverter on the base of simulation tests and laboratory investigations of the low power laboratory model.