EPE Association: EPE 2023 - DS2m: Vehicle Battery Chargers: On-Board (Wired and Inductive) and Stationary (Ultra) Fast Chargers

EPE 2023 - DS2m: Vehicle Battery Chargers: On-Board (Wired and Inductive) and Stationary (Ultra) Fast Chargers
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 08: Electric Vehicle Propulsion Systems and their Energy Storage > EPE 2023 - DS2m: Vehicle Battery Chargers: On-Board (Wired and Inductive) and Stationary (Ultra) Fast Chargers

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   Applying a Fast Analytic Calculation Method in CM Domain for Touch Currentsto a Two-Stage Charging Infrastructure
By Christian STUTZ, Sebastian NIELEBOCK, Martin MÄRZ [View]
[Download]

Abstract: Keeping touch & leakage currents within the tough regulation limits is a very ambitious goal for non-isolated EV-chargers, affecting the entire system setup (topology, PWM, filter). This paper improves the scope of a timesaving analytical touch current calculation method by expanding the modelling from a single-stage to a two-stage power electronic architecture. The analytic calculation workflow is validated with a laboratory setup including a 2-level 3-phase active front end converter and a H-bridge DC-DC-converter. Finally, the influence of different DC-DC-converter PWM schemes on the touch current behaviour of the charging system is analysed in detail.

   Critical Short Circuit Ratio of an EV Charging System
By Lu WANG, Zian QIN, Junjie XIAO, Pavol BAUER [View]
[Download]

Abstract: The critical short circuit ratio (CSCR), as an important metric for grid stability evaluation, is not clearly defined in the literature. Aimed at clarifying the misunderstandings, the paper compares the differentCSCR definitions. Moreover, CSCR reduction-oriented design is studied for electric vehicle chargers. Simulations verify the analysis.

   Exploring the Potential of EV Motor Winding in LCL Filter Design for On-Board Chargers
By Muhammad Talib FAIZ, Junwei LIU, Ka Hei LEUNG, Muhammad Mansoor KHAN, Ka Hong LOO [View]
[Download]

Abstract: This study proposes utilizing the stator winding of an electric vehicle (EV) motor as an input filter for an active front-end rectifier stage of on-board charger, forming an LCL filter. However, the high value of grid-side filter inductance due to the EV motor winding may constrain the LCL filter design. A small signal model is developed to investigate system dynamics, and a control structure is designed for an integrated LCL filtered onboard charger (IOBC). Results show that integrated LCL filter performs similarly to typical LCL filter, with the added benefits of reduced weight, volume, and cost ofOBC. The effectiveness of the designed control structure was validated experimentally in real-time using Hardware-in-the-loop testing.

   Real-Time Capable Oversampling Model of a Fast-Switching Dual Active Bridge Converter with High PWM Resolution
By Axel KIFFE, Thorben HOFFSTADT [View]
[Download]

Abstract: On-board chargers in electric vehicles often include additional DC/DC converters between HV and LV batteries, like a dual active bridge. To test its control unit in terms of HIL simulations, a real-time capable model of the topology is required. This paper deals with the modeling and realization of a real-time capable model for a single-phase dual active bridge converter with a step-size of 88 ns. Additional focus is placed on the implementation of the final model on an FPGA. Simulation results complete the paper.

EPE 2023 - DS2m: Vehicle Battery Chargers: On-Board (Wired and Inductive) and Stationary (Ultra) Fast Chargers
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 08: Electric Vehicle Propulsion Systems and their Energy Storage > EPE 2023 - DS2m: Vehicle Battery Chargers: On-Board (Wired and Inductive) and Stationary (Ultra) Fast Chargers
	[return to parent folder]

	Applying a Fast Analytic Calculation Method in CM Domain for Touch Currentsto a Two-Stage Charging Infrastructure By Christian STUTZ, Sebastian NIELEBOCK, Martin MÄRZ	[View] [Download]
Abstract: Keeping touch & leakage currents within the tough regulation limits is a very ambitious goal for non-isolated EV-chargers, affecting the entire system setup (topology, PWM, filter). This paper improves the scope of a timesaving analytical touch current calculation method by expanding the modelling from a single-stage to a two-stage power electronic architecture. The analytic calculation workflow is validated with a laboratory setup including a 2-level 3-phase active front end converter and a H-bridge DC-DC-converter. Finally, the influence of different DC-DC-converter PWM schemes on the touch current behaviour of the charging system is analysed in detail.

	Critical Short Circuit Ratio of an EV Charging System By Lu WANG, Zian QIN, Junjie XIAO, Pavol BAUER	[View] [Download]
Abstract: The critical short circuit ratio (CSCR), as an important metric for grid stability evaluation, is not clearly defined in the literature. Aimed at clarifying the misunderstandings, the paper compares the differentCSCR definitions. Moreover, CSCR reduction-oriented design is studied for electric vehicle chargers. Simulations verify the analysis.

	Exploring the Potential of EV Motor Winding in LCL Filter Design for On-Board Chargers By Muhammad Talib FAIZ, Junwei LIU, Ka Hei LEUNG, Muhammad Mansoor KHAN, Ka Hong LOO	[View] [Download]
Abstract: This study proposes utilizing the stator winding of an electric vehicle (EV) motor as an input filter for an active front-end rectifier stage of on-board charger, forming an LCL filter. However, the high value of grid-side filter inductance due to the EV motor winding may constrain the LCL filter design. A small signal model is developed to investigate system dynamics, and a control structure is designed for an integrated LCL filtered onboard charger (IOBC). Results show that integrated LCL filter performs similarly to typical LCL filter, with the added benefits of reduced weight, volume, and cost ofOBC. The effectiveness of the designed control structure was validated experimentally in real-time using Hardware-in-the-loop testing.

	Real-Time Capable Oversampling Model of a Fast-Switching Dual Active Bridge Converter with High PWM Resolution By Axel KIFFE, Thorben HOFFSTADT	[View] [Download]
Abstract: On-board chargers in electric vehicles often include additional DC/DC converters between HV and LV batteries, like a dual active bridge. To test its control unit in terms of HIL simulations, a real-time capable model of the topology is required. This paper deals with the modeling and realization of a real-time capable model for a single-phase dual active bridge converter with a step-size of 88 ns. Additional focus is placed on the implementation of the final model on an FPGA. Simulation results complete the paper.