EPE Association: EPE 2022 - LS2c: Resonant Converters

EPE 2022 - LS2c: Resonant Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 02: Power Converter Topologies and Design > EPE 2022 - LS2c: Resonant Converters

   [return to parent folder]

   A Multi-Mode Control Based Asymmetrical Dual-Active-Bridge Series-Resonant DC-DC Converter (DABSRC)
By Muhammad YAQOOB [View]
[Download]

Abstract: A multi-mode control for asymmetrical dual-active-bridge series-resonant DC-DC converter (DABSRC)based on half-bridge and full-bridge switching configurations is proposed. The proposed control is configured to eliminate burst-mode operation while supporting an efficient wide-voltage range voltage variation handling and bidirectional power-_ow capabilities. Under heavy and medium load conditions, the proposed control method regulates converter's output by varying the switching frequency. When switching frequency exceeds its predetermined maximum value under light load conditions, a second control mode is employed (instead of opting for burst mode) where the switching frequency is fixed to maximum value and converter output is regulated by varying both the phase shift and duty cycle. The effectiveness of the proposed method is validated by experimental results with the peak efficiency of 98.95 \% and power density of approximately 218 W/in3 or 13.3 kW/L (including output filter and auxiliary-powercircuit).

   Mega-hertz High-power WPT system with Parallel-connected inverters using current balance circuit
By Masamichi YAMAGUCHI [View]
[Download]

Abstract: This paper proposes a new current balancer for the megahertz WPT system. The proposed balancer achieves a current balance between the parallel connection inverter on the transmission side of the WPT system. The balancer consists of two transformers without any additional control to achieve a current balance. The output side of a conventional balancer is not isolated from the input side of the balancer. The proposed balancer isolates the output side and the input side of the balancer. A turn ratio of two transformers is derived by magnet flux under the current balancing condition. Furthermore, the proposed balancer also has the capability of the impedance matching. The leakage inductance of two transformers is applied to achieve an impedance matching with an additional capacitor. The experimental results reveal that the current balance is achieved even if the phase of the output voltage of each inverter has a difference of approximately 8 ns.

   Parameter tuning method for classF2 converters for high-frequency wireless power transfer applications
By Yining LIU [View]
[Download]

Abstract: This paper presents a method to compensate detuning of class $\Phi\_2$ push-pull converters due to practical disparities such as component values tolerances, parasitic effects, and manufacturing errors. A simple and effective tuning method is proposed based on only four steps. An example 100 W, 6.78 MHz wireless power transfer system is presented, that reaches 82.3\% efficiency after tuning using the proposed method.

EPE 2022 - LS2c: Resonant Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2022 ECCE Europe - Conference > EPE 2022 - Topic 02: Power Converter Topologies and Design > EPE 2022 - LS2c: Resonant Converters
	[return to parent folder]

	A Multi-Mode Control Based Asymmetrical Dual-Active-Bridge Series-Resonant DC-DC Converter (DABSRC) By Muhammad YAQOOB	[View] [Download]
Abstract: A multi-mode control for asymmetrical dual-active-bridge series-resonant DC-DC converter (DABSRC)based on half-bridge and full-bridge switching configurations is proposed. The proposed control is configured to eliminate burst-mode operation while supporting an efficient wide-voltage range voltage variation handling and bidirectional power-_ow capabilities. Under heavy and medium load conditions, the proposed control method regulates converter's output by varying the switching frequency. When switching frequency exceeds its predetermined maximum value under light load conditions, a second control mode is employed (instead of opting for burst mode) where the switching frequency is fixed to maximum value and converter output is regulated by varying both the phase shift and duty cycle. The effectiveness of the proposed method is validated by experimental results with the peak efficiency of 98.95 \% and power density of approximately 218 W/in3 or 13.3 kW/L (including output filter and auxiliary-powercircuit).

	Mega-hertz High-power WPT system with Parallel-connected inverters using current balance circuit By Masamichi YAMAGUCHI	[View] [Download]
Abstract: This paper proposes a new current balancer for the megahertz WPT system. The proposed balancer achieves a current balance between the parallel connection inverter on the transmission side of the WPT system. The balancer consists of two transformers without any additional control to achieve a current balance. The output side of a conventional balancer is not isolated from the input side of the balancer. The proposed balancer isolates the output side and the input side of the balancer. A turn ratio of two transformers is derived by magnet flux under the current balancing condition. Furthermore, the proposed balancer also has the capability of the impedance matching. The leakage inductance of two transformers is applied to achieve an impedance matching with an additional capacitor. The experimental results reveal that the current balance is achieved even if the phase of the output voltage of each inverter has a difference of approximately 8 ns.

	Parameter tuning method for classF2 converters for high-frequency wireless power transfer applications By Yining LIU	[View] [Download]
Abstract: This paper presents a method to compensate detuning of class $\Phi\_2$ push-pull converters due to practical disparities such as component values tolerances, parasitic effects, and manufacturing errors. A simple and effective tuning method is proposed based on only four steps. An example 100 W, 6.78 MHz wireless power transfer system is presented, that reaches 82.3\% efficiency after tuning using the proposed method.