EPE Association: EPE 2023 - DS2b: Components and Devices for Specific Applications, including for Pulsed Power

EPE 2023 - DS2b: Components and Devices for Specific Applications, including for Pulsed Power
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 01: Devices, Packaging and System Integration > EPE 2023 - DS2b: Components and Devices for Specific Applications, including for Pulsed Power

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   A Resonant Converter with a Novel PCB-made High-Frequency Toroidal Coreless Transformer
By Simone DANIELE, Danilo SANTORO, Nicola DELMONTE, Paolo COVA [View]
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Abstract: In this research, a resonant converter has been designed for a pulsed current low-voltage automotive application. The key element of the converter is a PCB-made high-frequency toroidal coreless transformer. The transformer has been designed to transfer 1 kW absorption peaks through bursts of a 6.78 MHz sine wave. At this frequency, the efficiency of magnetic components decreases mainly due to winding and core losses. The specific geometry of the coreless transformer allows the zeroing of the core losses and maximizes the coupling factor between the primary and secondary sides of the transformer. SPICE and Finite Element Method (FEM) simulations have been used to determine the PCB layers and geometrical characteristics. Then, a prototype has been developed and experimental tests have been carried out at different working frequencies by tuning the resonant capacitance.

   Measurement Setup and Results for the Breakdown of Transformer Oil Under Rectangular Voltage Pulses in the µs-Range
By Spyridon STATHIS, Jürgen BIELA [View]
[Download]

Abstract: This paper presents the development and investigation of a breakdown system in order to evaluate the dielectric strength of the synthetic ester oil MIDEL 7131 under rectangular voltage pulses. The breakdown measurement data is used for the optimal insulation design of the pulse transformer for the CARM modulator system.

   Saturation characteristics analysis of Marx circuits based on avalanche transistors
By Han CHEN, Lin LIANG, Ziyang ZHANG [View]
[Download]

Abstract: The Avalanche Bipolar Junction Transistor turns on in just a few hundred picoseconds. It plays an irreplaceable role in the field of fast pulses. The saturation characteristics of Marx circuits based on avalanche transistors are especially obvious. By analyzing the circuit principle, the saturation characteristics are influenced by the discharge capacitor and load resistance. The influence is studied in this paper by building simulation circuits in PSPICE. By using the voltage utilization to quantify the saturation characteristics and fitting the parameters from the simulation results, a general saturation formula is obtained. Subsequently, a ten-stage Marx circuit is built to verify the saturation characteristics.

EPE 2023 - DS2b: Components and Devices for Specific Applications, including for Pulsed Power
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 01: Devices, Packaging and System Integration > EPE 2023 - DS2b: Components and Devices for Specific Applications, including for Pulsed Power
	[return to parent folder]

	A Resonant Converter with a Novel PCB-made High-Frequency Toroidal Coreless Transformer By Simone DANIELE, Danilo SANTORO, Nicola DELMONTE, Paolo COVA	[View] [Download]
Abstract: In this research, a resonant converter has been designed for a pulsed current low-voltage automotive application. The key element of the converter is a PCB-made high-frequency toroidal coreless transformer. The transformer has been designed to transfer 1 kW absorption peaks through bursts of a 6.78 MHz sine wave. At this frequency, the efficiency of magnetic components decreases mainly due to winding and core losses. The specific geometry of the coreless transformer allows the zeroing of the core losses and maximizes the coupling factor between the primary and secondary sides of the transformer. SPICE and Finite Element Method (FEM) simulations have been used to determine the PCB layers and geometrical characteristics. Then, a prototype has been developed and experimental tests have been carried out at different working frequencies by tuning the resonant capacitance.

	Measurement Setup and Results for the Breakdown of Transformer Oil Under Rectangular Voltage Pulses in the µs-Range By Spyridon STATHIS, Jürgen BIELA	[View] [Download]
Abstract: This paper presents the development and investigation of a breakdown system in order to evaluate the dielectric strength of the synthetic ester oil MIDEL 7131 under rectangular voltage pulses. The breakdown measurement data is used for the optimal insulation design of the pulse transformer for the CARM modulator system.

	Saturation characteristics analysis of Marx circuits based on avalanche transistors By Han CHEN, Lin LIANG, Ziyang ZHANG	[View] [Download]
Abstract: The Avalanche Bipolar Junction Transistor turns on in just a few hundred picoseconds. It plays an irreplaceable role in the field of fast pulses. The saturation characteristics of Marx circuits based on avalanche transistors are especially obvious. By analyzing the circuit principle, the saturation characteristics are influenced by the discharge capacitor and load resistance. The influence is studied in this paper by building simulation circuits in PSPICE. By using the voltage utilization to quantify the saturation characteristics and fitting the parameters from the simulation results, a general saturation formula is obtained. Subsequently, a ten-stage Marx circuit is built to verify the saturation characteristics.