EPE Association: EPE 2020 - LS4d: Power Electronics for Battery Charging

EPE 2020 - LS4d: Power Electronics for Battery Charging
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 08: Electric Vehicle Propulsion Systems and their Energy Storage > EPE 2020 - LS4d: Power Electronics for Battery Charging

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   A Symmetrical Boost Converter with Reduced Common-Mode Leakage Currents for EV Applications
By Caniggia VIANA [View]
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Abstract: An important design choice for power converters, including electric vehicles chargers, is whether or not to include a galvanic isolation transformer. While transformerless systems can be considerably lighter and cheaper, they are typically discarded as a design choice due to the potential presence of common mode leakage currents. In this paper, a 3-switch symmetrical boost converter is proposed, analyzed, simulated, and experimentally verified. The topology is shown to be suitable for non-isolated electric vehicle charging. The converter exhibits negligible common-mode leakage current, allowing it to meet safety standards without the need for an isolation transformer.

   An Architecture for Level-3 EV Battery Charger Stations Using Integrated Solid State Transformer (I-SST)
By Erick Ivan POOL MAZUN [View]
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Abstract: This paper proposes a new battery charger station architecture based on Integrated Solid-State Transformer (I-SST). The system consists of modular AC-AC converters with 20 kHz isolation and direct three-phase AC-DC Medium Voltage (MV) conversion. Output DC voltage regulation is achieved with a simple control scheme. Zero Voltage Switching (ZVS) is achievable for a wide output voltage range using phase-shift modulation. To comply with IEEE-519 standard, an Active Power Filter circuit block is employed. Simulation and experimental results are discussed.

   Exploiting a Multi-Port Transformer for Minimal DC-Link Capacitance for an Automotive Onboard Charger
By Franz VOLLMAIER [View]
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Abstract: In contrast to common 3-phase topologies, DC-link capacitance can be reduced by combining inputpower after the DC-link using a multi-port transformer and suitable control. Initial results of this approach demonstrate stable 12 kW output power using only 5 µF DC-link capacitance per phase, promising higher power density and reliability. Furthermore, a novel control scheme is proposed that allows high frequency reactive power flow through the multi-port transformer to be manipulated via gate-signal phase angles, in order to achieve maximum efficiency and minimum DC-link voltage ripple for any load condition.

   Fault-Tolerant Control of Series Connectable Modular Full-Bridge Inverter Mitigating Open Switch Faults
By Juris ARROZY [View]
[Download]

Abstract: This paper proposes the fault-tolerant control of a series connectable modular full-bridge inverter in case of an open switch fault. The faulty main switch is detected and identified by comparing the value of the measured phase node output voltage with the PWM signal generated for the respective phase leg. The series switch fault is detected and identified by comparing the measured output voltage of the phase legs connected by the series switch with a reference value. The post-fault control following an open main/series switch fault is realized by modifying several reference values in the healthy control system and is validated for several fault scenarios.

EPE 2020 - LS4d: Power Electronics for Battery Charging
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 08: Electric Vehicle Propulsion Systems and their Energy Storage > EPE 2020 - LS4d: Power Electronics for Battery Charging
	[return to parent folder]

	A Symmetrical Boost Converter with Reduced Common-Mode Leakage Currents for EV Applications By Caniggia VIANA	[View] [Download]
Abstract: An important design choice for power converters, including electric vehicles chargers, is whether or not to include a galvanic isolation transformer. While transformerless systems can be considerably lighter and cheaper, they are typically discarded as a design choice due to the potential presence of common mode leakage currents. In this paper, a 3-switch symmetrical boost converter is proposed, analyzed, simulated, and experimentally verified. The topology is shown to be suitable for non-isolated electric vehicle charging. The converter exhibits negligible common-mode leakage current, allowing it to meet safety standards without the need for an isolation transformer.

	An Architecture for Level-3 EV Battery Charger Stations Using Integrated Solid State Transformer (I-SST) By Erick Ivan POOL MAZUN	[View] [Download]
Abstract: This paper proposes a new battery charger station architecture based on Integrated Solid-State Transformer (I-SST). The system consists of modular AC-AC converters with 20 kHz isolation and direct three-phase AC-DC Medium Voltage (MV) conversion. Output DC voltage regulation is achieved with a simple control scheme. Zero Voltage Switching (ZVS) is achievable for a wide output voltage range using phase-shift modulation. To comply with IEEE-519 standard, an Active Power Filter circuit block is employed. Simulation and experimental results are discussed.

	Exploiting a Multi-Port Transformer for Minimal DC-Link Capacitance for an Automotive Onboard Charger By Franz VOLLMAIER	[View] [Download]
Abstract: In contrast to common 3-phase topologies, DC-link capacitance can be reduced by combining inputpower after the DC-link using a multi-port transformer and suitable control. Initial results of this approach demonstrate stable 12 kW output power using only 5 µF DC-link capacitance per phase, promising higher power density and reliability. Furthermore, a novel control scheme is proposed that allows high frequency reactive power flow through the multi-port transformer to be manipulated via gate-signal phase angles, in order to achieve maximum efficiency and minimum DC-link voltage ripple for any load condition.

	Fault-Tolerant Control of Series Connectable Modular Full-Bridge Inverter Mitigating Open Switch Faults By Juris ARROZY	[View] [Download]
Abstract: This paper proposes the fault-tolerant control of a series connectable modular full-bridge inverter in case of an open switch fault. The faulty main switch is detected and identified by comparing the value of the measured phase node output voltage with the PWM signal generated for the respective phase leg. The series switch fault is detected and identified by comparing the measured output voltage of the phase legs connected by the series switch with a reference value. The post-fault control following an open main/series switch fault is realized by modifying several reference values in the healthy control system and is validated for several fault scenarios.