EPE Association: EPE 2022 - DS1e: Resonant Converters

EPE 2022 - DS1e: Resonant Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 02: Power Converter Topologies and Design > EPE 2022 - DS1e: Resonant Converters

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   A PFC boost converter with reduced switching losses operating at a fixed switching frequency
By Burkhard ULRICH [View]
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Abstract: A single-phase fixed-frequency operated power factor correction circuit with reduced switching losses is proposed. The circuit uses the combination of a boost converter with an added clamp-switch, a pulse wave shaping circuit, and a standard control IC to discharge the transistor's output capacitance prior to its turn-on. In this way, a very low-complexity control circuit implementation to reduce switching losses or even achieve complete zero-voltage switching without additional sensors is possible. Moreover, this operation method is achieved at a constant switching frequency, possibly simplifying the design of the EMI filter and the converter's inductor. Experimental test results for a 100 W prototype converter are presented to validate the feasibility of the proposed operating method and corresponding circuit structure.

   A Series Resonant Balancing Converter for Bipolar DC Grids on Ships
By Sachin YADAV [View]
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Abstract: Balancing converters are an integral part of a bipolar dc grid. In this paper, we propose a balancing converter based on a series resonant converter topology. The converter operates in the capacitive region with phase shift between the upper and lower H-bridges. The converter operation is analyzed and verified with LTSpice simulation. A prototype is developed to verify the operation.

   Active output LLC converter topology
By Hannes BÖRNGEN [View]
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Abstract: This paper presents an 'active output' LLC topology, i.e. a variant of the load-resonant LLC converter with asynchronous rectification stage. In this topology, the output switches actively block and thus change the apparent parameters of the resonant tank. Advantages, such as an increased design space for converter optimisation, are gained.

   Analysis and design of a resonant DC/DC transformer in modular operation
By Abraham LÓPEZ ANTUÑA [View]
[Download]

Abstract: Modular connection between DC/DC converters is commonly used for many applications, to adapt voltage and power ranges, and in order to achieve scalability. This work presents a modular connection between DC/DC modules, providing an accurate voltage and power sharing, in a reliable way. This option could be used in the intermediate bus architectures, to adapt voltage and power levels, achieving high efficiency. Another advantage of the modular connection is the possibility of standardization. This way, it is possible to reuse a whole system module, just only adapting its voltage level, using an intermediate stage, based on the connection of several DC/DC blocks. To validate this solution, several DC/DC resonant converts have been designed for an input and output voltage of 56 V and 28 V respectively, for a rated power of 200 W (per module) and for a switching frequency of 400 kHz. Therefore, by combining several of these designed modules, it is possible to work at higher voltages and powers in whole system.

   Impact of Higher Current Harmonics on Component Current Stress and Conduction Losses of Half-Bridge-Series-Resonant-Converters in Discontinuous Conduction Mode for High-Power Applications
By Daniel HAAKE [View]
[Download]

Abstract: The half-bridge series resonant converter (HB-SRC) offers advantages with regard to power density compared to hard-switching topologies. To achieve soft-switching, the HB-SRC has to operate in discontinuous conduction mode (DCM). However, this operation influences component current waveforms and thus the component current stresses and losses in the converter, which are examined analytically and simulatively in this paper.

   Minimizing voltage stress in Auxiliary Resonant Commutated Pole Inverters Using saturable Inductors
By Markus ZOCHER [View]
[Download]

Abstract: This paper demonstrates a method to reduce the voltage stress of the auxiliary transistors inside anARCP inverter. A saturable inductance softens the diode reverse recovery process. The proposedmethod has been successfully tested on a prototype converter over a wide range of currents, DC linkvoltages and switching frequencies.

EPE 2022 - DS1e: Resonant Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 02: Power Converter Topologies and Design > EPE 2022 - DS1e: Resonant Converters
	[return to parent folder]

	A PFC boost converter with reduced switching losses operating at a fixed switching frequency By Burkhard ULRICH	[View] [Download]
Abstract: A single-phase fixed-frequency operated power factor correction circuit with reduced switching losses is proposed. The circuit uses the combination of a boost converter with an added clamp-switch, a pulse wave shaping circuit, and a standard control IC to discharge the transistor's output capacitance prior to its turn-on. In this way, a very low-complexity control circuit implementation to reduce switching losses or even achieve complete zero-voltage switching without additional sensors is possible. Moreover, this operation method is achieved at a constant switching frequency, possibly simplifying the design of the EMI filter and the converter's inductor. Experimental test results for a 100 W prototype converter are presented to validate the feasibility of the proposed operating method and corresponding circuit structure.

	A Series Resonant Balancing Converter for Bipolar DC Grids on Ships By Sachin YADAV	[View] [Download]
Abstract: Balancing converters are an integral part of a bipolar dc grid. In this paper, we propose a balancing converter based on a series resonant converter topology. The converter operates in the capacitive region with phase shift between the upper and lower H-bridges. The converter operation is analyzed and verified with LTSpice simulation. A prototype is developed to verify the operation.

	Active output LLC converter topology By Hannes BÖRNGEN	[View] [Download]
Abstract: This paper presents an 'active output' LLC topology, i.e. a variant of the load-resonant LLC converter with asynchronous rectification stage. In this topology, the output switches actively block and thus change the apparent parameters of the resonant tank. Advantages, such as an increased design space for converter optimisation, are gained.

	Analysis and design of a resonant DC/DC transformer in modular operation By Abraham LÓPEZ ANTUÑA	[View] [Download]
Abstract: Modular connection between DC/DC converters is commonly used for many applications, to adapt voltage and power ranges, and in order to achieve scalability. This work presents a modular connection between DC/DC modules, providing an accurate voltage and power sharing, in a reliable way. This option could be used in the intermediate bus architectures, to adapt voltage and power levels, achieving high efficiency. Another advantage of the modular connection is the possibility of standardization. This way, it is possible to reuse a whole system module, just only adapting its voltage level, using an intermediate stage, based on the connection of several DC/DC blocks. To validate this solution, several DC/DC resonant converts have been designed for an input and output voltage of 56 V and 28 V respectively, for a rated power of 200 W (per module) and for a switching frequency of 400 kHz. Therefore, by combining several of these designed modules, it is possible to work at higher voltages and powers in whole system.

	Impact of Higher Current Harmonics on Component Current Stress and Conduction Losses of Half-Bridge-Series-Resonant-Converters in Discontinuous Conduction Mode for High-Power Applications By Daniel HAAKE	[View] [Download]
Abstract: The half-bridge series resonant converter (HB-SRC) offers advantages with regard to power density compared to hard-switching topologies. To achieve soft-switching, the HB-SRC has to operate in discontinuous conduction mode (DCM). However, this operation influences component current waveforms and thus the component current stresses and losses in the converter, which are examined analytically and simulatively in this paper.

	Minimizing voltage stress in Auxiliary Resonant Commutated Pole Inverters Using saturable Inductors By Markus ZOCHER	[View] [Download]
Abstract: This paper demonstrates a method to reduce the voltage stress of the auxiliary transistors inside anARCP inverter. A saturable inductance softens the diode reverse recovery process. The proposedmethod has been successfully tested on a prototype converter over a wide range of currents, DC linkvoltages and switching frequencies.