EPE Association: EPE 2013 - LS8d: Soft Switching Converters

EPE 2013 - LS8d: Soft Switching Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 04: Soft switching converters and control > EPE 2013 - LS8d: Soft Switching Converters

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   Evaluation of Partial Turn off Dynamics for High Power Chopper using IGBT
By Yukinori TSURUTA, Atsuo KAWAMURA [View]
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Abstract: This paper describes evaluation of IGBT partial turn-off behavior by 3 types of circuit topologies, hard switching (SW) type, Zero Voltage Switching (ZVS) type and Tail Loss Cancel (TLC) method. Partial turn-off method by ZVS without over elimination in proposed Snubber Assisted Zero voltage and Zero current transition (SAZZ) topology obtained highest efficiency of 97.42 \% at 30 kW, 1.82 \% higher than hard SW from 95.6 \% and highest efficiency over whole power region.

   Flying Capacitor Resonant Pole Inverter Topology with Reduced Switch Voltage Stress
By Jordy VAN EMDEN, J. VAN DUIVENBODE, Jorge DUARTE [View]
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Abstract: Increasing the bus voltage in high power applications has reached a limit, amongst others by susceptibility to single event burnout induced by cosmic radiation. Single event burnout has a strong correlation to the voltage stress over the switching device. This paper proposes a soft switching multilevel converter to raise the power limit and reduce the susceptibility to cosmic radiation by combining a flying capacitor with a resonant pole inverter. A laboratory test circuit is built, and the circuit operation shows satisfactory agreement with the theoretical analysis and simulation results. The experimental results show that this converter module reliably reduces the voltage stress over the devices without interfering with the zero voltage switching capabilities. This is done with relatively low added complexity.

   New Topology of Three Phase Soft Switching Inverter Using a Dual Auxiliary Circuit
By Cosmin GALEA [View]
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Abstract: In current paper it is described a new topology of a three phase soft switching inverter. The aim is to develop a robust and practical soft switching inverter used in high power and high switching frequency applications. The presented topology is using coupled inductors and gives significant practical advantages when compared with similar topologies. The circuit can provide a mechanism by which the magnetization current passing the coupled inductor is reset. The new topology is also preventing the flow of free-wheeling currents generated in the main inverter into the auxiliary soft switching cell. These two parasitic effects can cause saturation of the magnetic core used for coupling the inductors. This mechanism is described on the steady-state stages and also simulations are provided to confirm the theoretical assumptions. The circuit has been simulated in SABER but also implemented in a prototype, while its performance is evaluated by test.

EPE 2013 - LS8d: Soft Switching Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2013 ECCE Europe - Conference > EPE 2013 - Topic 04: Soft switching converters and control > EPE 2013 - LS8d: Soft Switching Converters
	[return to parent folder]

	Evaluation of Partial Turn off Dynamics for High Power Chopper using IGBT By Yukinori TSURUTA, Atsuo KAWAMURA	[View] [Download]
Abstract: This paper describes evaluation of IGBT partial turn-off behavior by 3 types of circuit topologies, hard switching (SW) type, Zero Voltage Switching (ZVS) type and Tail Loss Cancel (TLC) method. Partial turn-off method by ZVS without over elimination in proposed Snubber Assisted Zero voltage and Zero current transition (SAZZ) topology obtained highest efficiency of 97.42 \% at 30 kW, 1.82 \% higher than hard SW from 95.6 \% and highest efficiency over whole power region.

	Flying Capacitor Resonant Pole Inverter Topology with Reduced Switch Voltage Stress By Jordy VAN EMDEN, J. VAN DUIVENBODE, Jorge DUARTE	[View] [Download]
Abstract: Increasing the bus voltage in high power applications has reached a limit, amongst others by susceptibility to single event burnout induced by cosmic radiation. Single event burnout has a strong correlation to the voltage stress over the switching device. This paper proposes a soft switching multilevel converter to raise the power limit and reduce the susceptibility to cosmic radiation by combining a flying capacitor with a resonant pole inverter. A laboratory test circuit is built, and the circuit operation shows satisfactory agreement with the theoretical analysis and simulation results. The experimental results show that this converter module reliably reduces the voltage stress over the devices without interfering with the zero voltage switching capabilities. This is done with relatively low added complexity.

	New Topology of Three Phase Soft Switching Inverter Using a Dual Auxiliary Circuit By Cosmin GALEA	[View] [Download]
Abstract: In current paper it is described a new topology of a three phase soft switching inverter. The aim is to develop a robust and practical soft switching inverter used in high power and high switching frequency applications. The presented topology is using coupled inductors and gives significant practical advantages when compared with similar topologies. The circuit can provide a mechanism by which the magnetization current passing the coupled inductor is reset. The new topology is also preventing the flow of free-wheeling currents generated in the main inverter into the auxiliary soft switching cell. These two parasitic effects can cause saturation of the magnetic core used for coupling the inductors. This mechanism is described on the steady-state stages and also simulations are provided to confirm the theoretical assumptions. The circuit has been simulated in SABER but also implemented in a prototype, while its performance is evaluated by test.