EPE Association: EPE 2023 - LS5c: Resonant Converters

EPE 2023 - LS5c: Resonant Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 02: Power Converter Topologies and Design > EPE 2023 - LS5c: Resonant Converters

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   A Phase Detection Method using Power Handling Capability in Resonant Converters
By Faheem AHMAD, Szymon BECZKOWSKI, Asger Bjørn JØRGENSEN, Stig MUNK-NIELSEN [View]
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Abstract: In resonant converter, controlling phase angle is important as insufficient phase can lead to semiconductor devices to enter complete or partial hard-switching conditions. This is exceptionally challenging when operating at multi-MHz switching frequency. This paper proposes a concept of calculating phase angle from resonant topology inherent property of power handling capability. A Class-PN resonant converter topology is operated with a series-parallel compensated load at 6.76 MHz. The phase angle is measured using experimental waveforms and compared with calculated values by proposed methodology of using the power handling capability. The proposed methodology calculates phase angle with an error of 3.2-6.6_ compared to measurement when the input DC voltage is varied from 180-300 V.

   DC link balancing of an Auxiliary Resonant Commutated Pole Inverter
By Markus ZOCHER, Norbert GRASS, Ralph KENNEL [View]
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Abstract: The standard Auxiliary Resonant Commutated Pole topology adds soft switching to half-bridge based inverters but requires a balancing of the DC link midpoint to achieve quasi-resonant or full ZVS switching. This paper presents a method to use the resonant leg not only for soft switching, but also for balancing of the DC link midpoint, allowing additional hardware components to be omitted. The theoretical limits of this method are investigated, showing the maximum balancing current is viable. The practical implementation shows a way to use the balancing algorithms also with adaptive control methods suitable for small and nonlinear resonant tanks. Practical measurements confirm the theoretical considerations and successful implementation.

   Novel Control Strategy for a BidirectionalLCLC Converter with Resonant BoostCharging for Wide Varying Input Flow Battery
By Nagesha CHITPADI, Lakshminarasamma N [View]
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Abstract: A hybrid control scheme in discharge modeand the resonant boost operation in charging mode isproposed for a bidirectional LCLC converter to meetdesired steady state gain. During the charging mode,the converter operates with resonant boost mode. Theconverter is able to charge the battery to its maximum voltagewith the proposed resonant boost operation ensuringsoft switching for all primary and secondary MOSFETs.The converter operation is verified through simulationand experimentation. The obtained results are in goodagreement with the theoretical analysis. Additionally, thedischarge mode is tested with a built hardware prototypeand 95.85\% efficiency is observed at 500W load power.

EPE 2023 - LS5c: Resonant Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 02: Power Converter Topologies and Design > EPE 2023 - LS5c: Resonant Converters
	[return to parent folder]

	A Phase Detection Method using Power Handling Capability in Resonant Converters By Faheem AHMAD, Szymon BECZKOWSKI, Asger Bjørn JØRGENSEN, Stig MUNK-NIELSEN	[View] [Download]
Abstract: In resonant converter, controlling phase angle is important as insufficient phase can lead to semiconductor devices to enter complete or partial hard-switching conditions. This is exceptionally challenging when operating at multi-MHz switching frequency. This paper proposes a concept of calculating phase angle from resonant topology inherent property of power handling capability. A Class-PN resonant converter topology is operated with a series-parallel compensated load at 6.76 MHz. The phase angle is measured using experimental waveforms and compared with calculated values by proposed methodology of using the power handling capability. The proposed methodology calculates phase angle with an error of 3.2-6.6_ compared to measurement when the input DC voltage is varied from 180-300 V.

	DC link balancing of an Auxiliary Resonant Commutated Pole Inverter By Markus ZOCHER, Norbert GRASS, Ralph KENNEL	[View] [Download]
Abstract: The standard Auxiliary Resonant Commutated Pole topology adds soft switching to half-bridge based inverters but requires a balancing of the DC link midpoint to achieve quasi-resonant or full ZVS switching. This paper presents a method to use the resonant leg not only for soft switching, but also for balancing of the DC link midpoint, allowing additional hardware components to be omitted. The theoretical limits of this method are investigated, showing the maximum balancing current is viable. The practical implementation shows a way to use the balancing algorithms also with adaptive control methods suitable for small and nonlinear resonant tanks. Practical measurements confirm the theoretical considerations and successful implementation.

	Novel Control Strategy for a BidirectionalLCLC Converter with Resonant BoostCharging for Wide Varying Input Flow Battery By Nagesha CHITPADI, Lakshminarasamma N	[View] [Download]
Abstract: A hybrid control scheme in discharge modeand the resonant boost operation in charging mode isproposed for a bidirectional LCLC converter to meetdesired steady state gain. During the charging mode,the converter operates with resonant boost mode. Theconverter is able to charge the battery to its maximum voltagewith the proposed resonant boost operation ensuringsoft switching for all primary and secondary MOSFETs.The converter operation is verified through simulationand experimentation. The obtained results are in goodagreement with the theoretical analysis. Additionally, thedischarge mode is tested with a built hardware prototypeand 95.85\% efficiency is observed at 500W load power.