EPE Association: EPE 2019 - LS3b: Converter Design and Optimization (CDO)

EPE 2019 - LS3b: Converter Design and Optimization (CDO)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2019 ECCE Europe - Conference > EPE 2019 - Topic 02: Power Converter Topologies and Design > EPE 2019 - LS3b: Converter Design and Optimization (CDO)

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   A 5-Level Inverter Topology Using a Single DC-Link with Reduced Switch Count for Open-End Induction Motor Drives
By Mriganka GHOSH MAJUMDER [View]
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Abstract: A multilevel inverter scheme with reduced number of switches using a single DC-link for open-endinduction motor drives (OEIM) is presented in this paper. The total inverter system with OEIM yieldsvoltage space vector (SV) locations alike to a 5-Level inverter. This proposed system is obtained bysupplying OEIM with 3-Level inverter from one side and capacitor fed 2-Level inverter from anotherside. The capacitor of the 2-Level inverter is balanced by space vector redundancy to its nominal voltage of Vdc/4 where Vdc is the DC link voltage and the flying capacitors in 3-Level inverter is balanced by pole voltage redundancy to its nominal voltage of Vdc/2. The simulation and hardware results for steady and transient state operation are also presented in this paper.

   An Active Modulation Scheme for Avoiding Overcharging in the Dual Converter with Isolated Asymmetric Supplies
By Zhen HUANG [View]
[Download]

Abstract: This paper presents an enhanced modulation technique for dual converters with isolated supplies. Thisunified modulation technique is applicable for any positive voltage ratio between the isolated supplies.The modulation technique enhances the quality of converter output voltage compared to using previously reported methods. The effectiveness of the proposed technique is validated and results are presented for an open-end winding induction motor to demonstrate the advantages.

   Bidirectional Hybrid Switched-Inductor Switched-Capacitor Converter Topology with High Voltage Gain
By Dan-Cornel HULEA [View]
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Abstract: This paper proposes a new bidirectional hybrid DC-DC converter which uses a combination of a switched-capacitor and switched-inductor structure. The hybrid structure, based on the switched inductor and capacitor cells, helps achieve multiple advantages such as higher voltage conversion ratio, passive component size reduction, and active switch stress reduction. The mathematical analysis of the new converter is performed, addressing its control and stability through small-signal analysis modeling, and simulation results are used to confirm the theoretical considerations.

   Influence of the Filter Inductance on the Power Losses of Medium Power Low Voltage Grid Converters
By Marius KAUFMANN-BÜHLER [View]
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Abstract: In the application of a low voltage grid converter, five different state-of-the-art semiconductor devices are investigated with regards to their power loss dependency on the converter side filter inductance, which directly determines the waveform and especially the ripple of the converter output current. Comprehensive simulations of two Si IGBTs and two SiC MOSFETs reveal, that the converter losses change in a range of less than 2 \% when the filter inductance is reduced by 60 \%. This small is influence is confirmed by experimental investigations with two different converters, where the overall power losses change in a range of less than 6 \%. The reduction of the filter inductance leads to a slight efficiency improvement of the SiC converter. Measurements show that the filter losses, which contribute a significant share to the overall losses, can be reduced by choosing a smaller inductance, if the changing DC resistance is considered.

EPE 2019 - LS3b: Converter Design and Optimization (CDO)
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2019 ECCE Europe - Conference > EPE 2019 - Topic 02: Power Converter Topologies and Design > EPE 2019 - LS3b: Converter Design and Optimization (CDO)
	[return to parent folder]

	A 5-Level Inverter Topology Using a Single DC-Link with Reduced Switch Count for Open-End Induction Motor Drives By Mriganka GHOSH MAJUMDER	[View] [Download]
Abstract: A multilevel inverter scheme with reduced number of switches using a single DC-link for open-endinduction motor drives (OEIM) is presented in this paper. The total inverter system with OEIM yieldsvoltage space vector (SV) locations alike to a 5-Level inverter. This proposed system is obtained bysupplying OEIM with 3-Level inverter from one side and capacitor fed 2-Level inverter from anotherside. The capacitor of the 2-Level inverter is balanced by space vector redundancy to its nominal voltage of Vdc/4 where Vdc is the DC link voltage and the flying capacitors in 3-Level inverter is balanced by pole voltage redundancy to its nominal voltage of Vdc/2. The simulation and hardware results for steady and transient state operation are also presented in this paper.

	An Active Modulation Scheme for Avoiding Overcharging in the Dual Converter with Isolated Asymmetric Supplies By Zhen HUANG	[View] [Download]
Abstract: This paper presents an enhanced modulation technique for dual converters with isolated supplies. Thisunified modulation technique is applicable for any positive voltage ratio between the isolated supplies.The modulation technique enhances the quality of converter output voltage compared to using previously reported methods. The effectiveness of the proposed technique is validated and results are presented for an open-end winding induction motor to demonstrate the advantages.

	Bidirectional Hybrid Switched-Inductor Switched-Capacitor Converter Topology with High Voltage Gain By Dan-Cornel HULEA	[View] [Download]
Abstract: This paper proposes a new bidirectional hybrid DC-DC converter which uses a combination of a switched-capacitor and switched-inductor structure. The hybrid structure, based on the switched inductor and capacitor cells, helps achieve multiple advantages such as higher voltage conversion ratio, passive component size reduction, and active switch stress reduction. The mathematical analysis of the new converter is performed, addressing its control and stability through small-signal analysis modeling, and simulation results are used to confirm the theoretical considerations.

	Influence of the Filter Inductance on the Power Losses of Medium Power Low Voltage Grid Converters By Marius KAUFMANN-BÜHLER	[View] [Download]
Abstract: In the application of a low voltage grid converter, five different state-of-the-art semiconductor devices are investigated with regards to their power loss dependency on the converter side filter inductance, which directly determines the waveform and especially the ripple of the converter output current. Comprehensive simulations of two Si IGBTs and two SiC MOSFETs reveal, that the converter losses change in a range of less than 2 \% when the filter inductance is reduced by 60 \%. This small is influence is confirmed by experimental investigations with two different converters, where the overall power losses change in a range of less than 6 \%. The reduction of the filter inductance leads to a slight efficiency improvement of the SiC converter. Measurements show that the filter losses, which contribute a significant share to the overall losses, can be reduced by choosing a smaller inductance, if the changing DC resistance is considered.