EPE Association: Pelincec 2005 - 05: Components and Converters

Pelincec 2005 - 05: Components and Converters
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > Pelincec 2005 > Pelincec 2005 - 05: Components and Converters

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   Five-Level Inverter Topology for IM Drive With DC-Link Capacitor Voltage Balancing and Common-Mode Voltage Elimination in Complete Modulation Range
By P.N. Tekwani, R.S. Kanchan, K. Gopakumar [View]
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Abstract: This paper presents a five-level inverter topology for induction motor (IM) drive with dc-link capacitor voltage balancing and common-mode voltage elimination. A dual fivelevel inverter fed open-end winding IM structure is used in the present work. A hysteresis controller based closed loop control scheme is proposed. It achieves the balancing of dc-link capacitor voltages and elimination of common-mode voltage, together, in the complete modulation range of the drive, including the over modulation up to the 24-step mode operation. The controller is capable of providing the capacitor voltage balancing and common-mode voltage elimination in the motoring as well as regenerative mode of operation. The proposed control scheme does not affect the fundamental output voltage generated by the inverter, as it effectively utilizes the availability of redundant switching states for capacitor voltage balancing. The scheme is presented with the simulation studies and experimentally verified with a 1.5 kW open-end winding IM drive.

   Frequency Converter Paralleling using a Step-up Three-phase Transformer with multiple primaries
By Anssi Lipsanen, Marko Kettunen, Juha Pyrhönen, Pertti Silventoinen [View]
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Abstract: A step-up transformer is being used in frequency converter motor drives to increase the output voltage of the supply system. In addition, a larger current requirement is ensured with parallel frequency converters coupled via threephase multi-primary step-up transformer. Parallel operation of inverters with transformer coupling is a difficult task to implement. In this paper, the whole system and most of the known problems are introduced. The paper is written on a basis of literature research, and in the future papers, the solutions for each problem are presented by means of simulations and measurements.

   Dynamic Voltage Rise Control, the most efficient way to control turn – off switching behaviour of IGBT transistors
By Piotr Luniewski, Uwe Jansen, Michael Hornkamp [View]
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Abstract: The goal of this paper is to present a new approach for the control strategy of Trench-/Field-Stop IGBTs which results in optimised turn-off behaviour. Significant UCE overvoltages across stray inductances, as a result of very high di/dt during turning-off and collector current oscillations caused by the absence of tail current, are key challenges in the control of this new IGBT structure. This article contains detailed analysis of Dynamic Voltage Rise Control and experimental results for the high current IGBT 1200V- and 1700V- families.

   Active Flicker Compensation in Medium-Voltage Lines Using Multilevel Converters
By Giuseppe Buja, Simone Castellan [View]
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Abstract: The paper is concerned with the active compensation of the flicker phenomenon in the medium-voltage lines using multilevel converters. Two configurations of compensator are designed, built up on the Diode Clamped Multilevel Converter (DCMLC) and the Cascade H-bridge Multilevel Converter (CMLC). By analytical procedure, the current ratings of the semiconductor devices are established, and the size of the passive elements of the compensators is found. The main outcome of the study is that the two configurations substantially require the same overall rating for the semiconductor devices, with the exception of the clamping diodes in the DCMLC-based configuration. As a counterpart, the latter configuration needs a lower overall capacitance.

Pelincec 2005 - 05: Components and Converters
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > Pelincec 2005 > Pelincec 2005 - 05: Components and Converters
	[return to parent folder]

	Five-Level Inverter Topology for IM Drive With DC-Link Capacitor Voltage Balancing and Common-Mode Voltage Elimination in Complete Modulation Range By P.N. Tekwani, R.S. Kanchan, K. Gopakumar	[View] [Download]
Abstract: This paper presents a five-level inverter topology for induction motor (IM) drive with dc-link capacitor voltage balancing and common-mode voltage elimination. A dual fivelevel inverter fed open-end winding IM structure is used in the present work. A hysteresis controller based closed loop control scheme is proposed. It achieves the balancing of dc-link capacitor voltages and elimination of common-mode voltage, together, in the complete modulation range of the drive, including the over modulation up to the 24-step mode operation. The controller is capable of providing the capacitor voltage balancing and common-mode voltage elimination in the motoring as well as regenerative mode of operation. The proposed control scheme does not affect the fundamental output voltage generated by the inverter, as it effectively utilizes the availability of redundant switching states for capacitor voltage balancing. The scheme is presented with the simulation studies and experimentally verified with a 1.5 kW open-end winding IM drive.

	Frequency Converter Paralleling using a Step-up Three-phase Transformer with multiple primaries By Anssi Lipsanen, Marko Kettunen, Juha Pyrhönen, Pertti Silventoinen	[View] [Download]
Abstract: A step-up transformer is being used in frequency converter motor drives to increase the output voltage of the supply system. In addition, a larger current requirement is ensured with parallel frequency converters coupled via threephase multi-primary step-up transformer. Parallel operation of inverters with transformer coupling is a difficult task to implement. In this paper, the whole system and most of the known problems are introduced. The paper is written on a basis of literature research, and in the future papers, the solutions for each problem are presented by means of simulations and measurements.

	Dynamic Voltage Rise Control, the most efficient way to control turn – off switching behaviour of IGBT transistors By Piotr Luniewski, Uwe Jansen, Michael Hornkamp	[View] [Download]
Abstract: The goal of this paper is to present a new approach for the control strategy of Trench-/Field-Stop IGBTs which results in optimised turn-off behaviour. Significant UCE overvoltages across stray inductances, as a result of very high di/dt during turning-off and collector current oscillations caused by the absence of tail current, are key challenges in the control of this new IGBT structure. This article contains detailed analysis of Dynamic Voltage Rise Control and experimental results for the high current IGBT 1200V- and 1700V- families.

	Active Flicker Compensation in Medium-Voltage Lines Using Multilevel Converters By Giuseppe Buja, Simone Castellan	[View] [Download]
Abstract: The paper is concerned with the active compensation of the flicker phenomenon in the medium-voltage lines using multilevel converters. Two configurations of compensator are designed, built up on the Diode Clamped Multilevel Converter (DCMLC) and the Cascade H-bridge Multilevel Converter (CMLC). By analytical procedure, the current ratings of the semiconductor devices are established, and the size of the passive elements of the compensators is found. The main outcome of the study is that the two configurations substantially require the same overall rating for the semiconductor devices, with the exception of the clamping diodes in the DCMLC-based configuration. As a counterpart, the latter configuration needs a lower overall capacitance.