EPE Association: EPE 2019 - LS2b: Advanced Power Converter Topologies (APC)

EPE 2019 - LS2b: Advanced Power Converter Topologies (APC)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2019 ECCE Europe - Conference > EPE 2019 - Topic 02: Power Converter Topologies and Design > EPE 2019 - LS2b: Advanced Power Converter Topologies (APC)

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   A new, universal Series Hybrid Cascaded H-Bridge Converter for Power-Hardware in the Loop Emulation
By Rüdiger SCHWENDEMANN [View]
[Download]

Abstract: This paper presents a new Series-Hybrid Cascaded H-Bridge (SH-CHB) Converter for Power-Hardware in the Loop (PHIL) systems. The converter combines the benefits of CHB-Cells, high power density and system efficiency, with the advantages of Linear Power Amplifiers (LPA), high bandwidth and fidelity. The presented system is used to emulate different AC-grids as well as DC-grids with simultaneous supply of sinusoidal test signals for impedance spectroscopy of converters. The system provides sinusoidal test signals up to 105_kHz with a three-phase output AC voltage of 400_V or a DC voltage of 1000_V. The maximum output power of the system is 60_kVA.

   Characteristics of Interleave Operation of Isolated dc-dc Converter with class Phi-2 inverter
By Yuta YANAGISAWA [View]
[Download]

Abstract: The resonant power converter has a lot of attention because switching losses are small by a soft-switching topology even in the high-frequency region beyond over 1 MHz. The class Phi-2 inverter, which is one of the resonant power converters, is able to operate as an inverter with only one switching device. However, the operating area of the class Phi-2 inverter is limited by load conditions because the drain-source voltage waveform is effected by load resistance. Thus, the class Phi-2 inverter is able to operate only under nearly designed load conditions, and not to operate under various load applications. Therefore, extension of the operating area of the class Phi-2 inverter is desired. In this paper, the interleaving operation of the isolated dc-dc converter with the class Phi-2 inverter, which is required for increasing the output power and applicable range of the load, is investigated. Simulation and experiment of the converter with interleave configuration are conducted at the switching frequency of 13.56 MHz. From simulation and experiment results, it was confirmed that the interleave configuration is effective to extend the operating area of the converter, and increase the output power. Moreover, the output power is able to be controlled by applying ON/OFF control from the circuit under various load conditions.

   Modeling and Design of a Linear-Assisted Zeta Converter
By Leandro TOMÉ MARTINS [View]
[Download]

Abstract: Linear-assisted switching (PWM) converters have advantages over single switching topologies, mainly because of the reduction or elimination of bulky output capacitors and ultra-fast dynamical response. In this paper, a linear-assisted zeta converter is presented. The linear regulator circuit is composed by three bipolar transistors and an operational amplifier, which drives the transistor based on the error between the output voltage and its reference. The modeling of the whole circuit is presented, as well as a design example. The modeling of the zeta converter is similar to the conventional topology modeling, except the fact that the linear regulator current is considered as an extra state that substitutes the state regarding the output capacitor voltage. The zeta converter can be designed independently of the linear regulator circuit and simulations are used to validate the static operation of the overall topology. Experimental results confirm in practice the ripple compensation of the main zeta converter, where extra current is provided by the main converter, in order to drive the linear regulator that is responsible for the ripple compensation.

   Optimal Design of a Medium-Voltage Grid Analyzer
By Frederik HAHN [View]
[Download]

Abstract: Much research has been done for medium-voltage applications, where multilevel inverters are challeng-ing classical low-voltage inverters, connected by transformers. Although the decision is very crucial forsystem costs and performance, comparisons of both approaches are missing, being now introduced forthe application of a medium-voltage grid analyzer.

EPE 2019 - LS2b: Advanced Power Converter Topologies (APC)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2019 ECCE Europe - Conference > EPE 2019 - Topic 02: Power Converter Topologies and Design > EPE 2019 - LS2b: Advanced Power Converter Topologies (APC)
	[return to parent folder]

	A new, universal Series Hybrid Cascaded H-Bridge Converter for Power-Hardware in the Loop Emulation By Rüdiger SCHWENDEMANN	[View] [Download]
Abstract: This paper presents a new Series-Hybrid Cascaded H-Bridge (SH-CHB) Converter for Power-Hardware in the Loop (PHIL) systems. The converter combines the benefits of CHB-Cells, high power density and system efficiency, with the advantages of Linear Power Amplifiers (LPA), high bandwidth and fidelity. The presented system is used to emulate different AC-grids as well as DC-grids with simultaneous supply of sinusoidal test signals for impedance spectroscopy of converters. The system provides sinusoidal test signals up to 105_kHz with a three-phase output AC voltage of 400_V or a DC voltage of 1000_V. The maximum output power of the system is 60_kVA.

	Characteristics of Interleave Operation of Isolated dc-dc Converter with class Phi-2 inverter By Yuta YANAGISAWA	[View] [Download]
Abstract: The resonant power converter has a lot of attention because switching losses are small by a soft-switching topology even in the high-frequency region beyond over 1 MHz. The class Phi-2 inverter, which is one of the resonant power converters, is able to operate as an inverter with only one switching device. However, the operating area of the class Phi-2 inverter is limited by load conditions because the drain-source voltage waveform is effected by load resistance. Thus, the class Phi-2 inverter is able to operate only under nearly designed load conditions, and not to operate under various load applications. Therefore, extension of the operating area of the class Phi-2 inverter is desired. In this paper, the interleaving operation of the isolated dc-dc converter with the class Phi-2 inverter, which is required for increasing the output power and applicable range of the load, is investigated. Simulation and experiment of the converter with interleave configuration are conducted at the switching frequency of 13.56 MHz. From simulation and experiment results, it was confirmed that the interleave configuration is effective to extend the operating area of the converter, and increase the output power. Moreover, the output power is able to be controlled by applying ON/OFF control from the circuit under various load conditions.

	Modeling and Design of a Linear-Assisted Zeta Converter By Leandro TOMÉ MARTINS	[View] [Download]
Abstract: Linear-assisted switching (PWM) converters have advantages over single switching topologies, mainly because of the reduction or elimination of bulky output capacitors and ultra-fast dynamical response. In this paper, a linear-assisted zeta converter is presented. The linear regulator circuit is composed by three bipolar transistors and an operational amplifier, which drives the transistor based on the error between the output voltage and its reference. The modeling of the whole circuit is presented, as well as a design example. The modeling of the zeta converter is similar to the conventional topology modeling, except the fact that the linear regulator current is considered as an extra state that substitutes the state regarding the output capacitor voltage. The zeta converter can be designed independently of the linear regulator circuit and simulations are used to validate the static operation of the overall topology. Experimental results confirm in practice the ripple compensation of the main zeta converter, where extra current is provided by the main converter, in order to drive the linear regulator that is responsible for the ripple compensation.

	Optimal Design of a Medium-Voltage Grid Analyzer By Frederik HAHN	[View] [Download]
Abstract: Much research has been done for medium-voltage applications, where multilevel inverters are challeng-ing classical low-voltage inverters, connected by transformers. Although the decision is very crucial forsystem costs and performance, comparisons of both approaches are missing, being now introduced forthe application of a medium-voltage grid analyzer.