EPE Association: EPE 2025 - LS2a: AC/DC and DC/AC Converter Topologies

EPE 2025 - LS2a: AC/DC and DC/AC Converter Topologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 09: Power Converter Topologies > EPE 2025 - LS2a: AC/DC and DC/AC Converter Topologies

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   Construction and Application of a Five-Level Inverter for Maximum Power Point Tracking (MPPT) of the Photovoltaic (PV)
By Alireza SIADATAN, Maryam SEPEHRINOUR, Hamed KARIMI [View]
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Abstract: Considering the high initial cost of a solar system, achieving maximum power output is crucial. In this paper, the Nemo conduction method is utilized to reach the maximum power point of an 80W solar module. This method is also used to supply power to an Ohmic inductor load from a five-level inverter with an active diode barrier at the output of a boost converter. With this setup, a two-level five-level inverter has been developed, and a predictive control method is employed to regulate the inverter, resulting in a five-level waveform at the output. The predictive control simulation successfully generates a five-level three-phase voltage while ensuring that the output current closely tracks the reference current and the voltage of the floating capacitors is controlled. The construction and simulation results demonstrate the accuracy and speed of locating the optimal point to maximize energy production.

   Investigations on Phase-Modular PFC with Integrated DC-link Energy Buffer for Single-Phase Operation
By Mattia IURICH, Franz VOLLMAIER, Thomas LANGBAUER, Zhen HUANG, Roberto PETRELLA [View]
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Abstract: In this paper a two-stage bidirectional Power Factor Correction (PFC) boost-buck topology featuring a novel built-in energy storage buffer functionality is proposed, specifically tailored for (isolated) OBC applications.Main concept idea is to allow a certain amount of voltage oscillation at twice the line frequency at the output of the boost PFC stage (allowing a significant reduction of the dc-bus capacitor), and let the cascaded step down converter, namely the SCB-PPB, to dynamically absorb the pulsating energy, aiming at supplying a stiff voltage for the multi-port DCX stage feeding the battery.The topology incorporates modular single-phase TP modules that deliver 3.6kW each in a three-phase set-up, or can be configured in parallel for single-phase operation at 2.4kW each, resulting in total output powers of 11kW and 7.2kW, respectively.The proposed active buffer solution allows enhancing the power density of the system, by minimizing the capacitor size, and makes use of varied semiconductor devices with breakdown voltages of 750V and 1.2kV.A MOO process is adopted to seek for the most effective balance between bulk capacitance and inductive components against losses and switching frequencies, thus achieving peak power density.Comprehensive analytical and simulation results are shown to validate the effectiveness of the proposal, together with a sketch of the actual experimental prototype.

   Model Predictive Current Control for G2V/V2G Bidirectional Operation of Onboard Charger
By Hyun-Gyu KOH, Tae-Seok KANG, Sami IRFAN, Yeong-Jun CHOI [View]
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Abstract: This paper proposes a straightforward method using model predictive current control (MPCC) to achieve bidirectional power transfer in electric vehicle on-board chargers (OBCs). Unlike existing studies requiring separate controller structure changes and control gain adjustments for grid-to-vehicle (G2V) and vehicle-to-grid (V2G) modes, the proposed method enables seamless mode switching. Utilizing a totem-pole power factor correction (PFC) converter, with the primary leg switching at high frequency and the secondary leg at grid frequency, and a CLLC resonant converter, the system achieves soft switching and bidirectional power transfer. The proposed strategy maintains high power factor greater than 0.99 and input current total harmonic distortion (THD) less than 3\% in G2V mode, ensures stable 180-degree phase-shifted power transfer in V2G mode, and maintains stable soft switching at the resonant frequency in both modes.

EPE 2025 - LS2a: AC/DC and DC/AC Converter Topologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 09: Power Converter Topologies > EPE 2025 - LS2a: AC/DC and DC/AC Converter Topologies
	[return to parent folder]

	Construction and Application of a Five-Level Inverter for Maximum Power Point Tracking (MPPT) of the Photovoltaic (PV) By Alireza SIADATAN, Maryam SEPEHRINOUR, Hamed KARIMI	[View] [Download]
Abstract: Considering the high initial cost of a solar system, achieving maximum power output is crucial. In this paper, the Nemo conduction method is utilized to reach the maximum power point of an 80W solar module. This method is also used to supply power to an Ohmic inductor load from a five-level inverter with an active diode barrier at the output of a boost converter. With this setup, a two-level five-level inverter has been developed, and a predictive control method is employed to regulate the inverter, resulting in a five-level waveform at the output. The predictive control simulation successfully generates a five-level three-phase voltage while ensuring that the output current closely tracks the reference current and the voltage of the floating capacitors is controlled. The construction and simulation results demonstrate the accuracy and speed of locating the optimal point to maximize energy production.

	Investigations on Phase-Modular PFC with Integrated DC-link Energy Buffer for Single-Phase Operation By Mattia IURICH, Franz VOLLMAIER, Thomas LANGBAUER, Zhen HUANG, Roberto PETRELLA	[View] [Download]
Abstract: In this paper a two-stage bidirectional Power Factor Correction (PFC) boost-buck topology featuring a novel built-in energy storage buffer functionality is proposed, specifically tailored for (isolated) OBC applications.Main concept idea is to allow a certain amount of voltage oscillation at twice the line frequency at the output of the boost PFC stage (allowing a significant reduction of the dc-bus capacitor), and let the cascaded step down converter, namely the SCB-PPB, to dynamically absorb the pulsating energy, aiming at supplying a stiff voltage for the multi-port DCX stage feeding the battery.The topology incorporates modular single-phase TP modules that deliver 3.6kW each in a three-phase set-up, or can be configured in parallel for single-phase operation at 2.4kW each, resulting in total output powers of 11kW and 7.2kW, respectively.The proposed active buffer solution allows enhancing the power density of the system, by minimizing the capacitor size, and makes use of varied semiconductor devices with breakdown voltages of 750V and 1.2kV.A MOO process is adopted to seek for the most effective balance between bulk capacitance and inductive components against losses and switching frequencies, thus achieving peak power density.Comprehensive analytical and simulation results are shown to validate the effectiveness of the proposal, together with a sketch of the actual experimental prototype.

	Model Predictive Current Control for G2V/V2G Bidirectional Operation of Onboard Charger By Hyun-Gyu KOH, Tae-Seok KANG, Sami IRFAN, Yeong-Jun CHOI	[View] [Download]
Abstract: This paper proposes a straightforward method using model predictive current control (MPCC) to achieve bidirectional power transfer in electric vehicle on-board chargers (OBCs). Unlike existing studies requiring separate controller structure changes and control gain adjustments for grid-to-vehicle (G2V) and vehicle-to-grid (V2G) modes, the proposed method enables seamless mode switching. Utilizing a totem-pole power factor correction (PFC) converter, with the primary leg switching at high frequency and the secondary leg at grid frequency, and a CLLC resonant converter, the system achieves soft switching and bidirectional power transfer. The proposed strategy maintains high power factor greater than 0.99 and input current total harmonic distortion (THD) less than 3\% in G2V mode, ensures stable 180-degree phase-shifted power transfer in V2G mode, and maintains stable soft switching at the resonant frequency in both modes.