EPE Association: EPE 2009 - Subtopic 06-3 - LS: 'Converter Control Sets and Modulation Strategies'

EPE 2009 - Subtopic 06-3 - LS: 'Converter Control Sets and Modulation Strategies'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 06: 'Modulation Strategies and Specific Control Methods for Static Converter' > EPE 2009 - Subtopic 06-3 - LS: 'Converter Control Sets and Modulation Strategies'

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   Design and Experimental Investigation of Space Vector Modulation for Three-leg Four-Wire Voltage Source Inverters
By Egon ORTJOHANN, Alaa MOHD, Danny MORTON [View]
[Download]

Abstract: This paper introduces various control functions for three-leg four-wire inverters (These also apply to four leg inverters). These functions are capable of feeding loads even under extreme unbalanced load conditions. As a part of this control strategy the paper is presenting a new approach of SVM for three-leg four-wire voltage-source inverters. The steps for the SVM implementation are identified. The switching vectors, 3-D-SVM diagrams and the boundaryplanes equations, as well as the matrices for the duty cycles and symmetric switching sequences are discussed in detail. Experimental results including different loads are presented to validate the proposed novel space vector modulation control strategy for three-leg four-wire voltage source inverters. These results show that the proposed SVM control schemes can carry out the feeding requirements of unbalanced loads in a very efficient way.

   Carrier-Based PWM with Minimum Power Losses for IGBT Multiphase Inverters
By Domenico CASADEI, Michele MENGONI, Giovanni SERRA, Angelo TANI, Luca ZARRI [View]
[Download]

Abstract: Nowadays there is an increasing attention towards multiphase drives, especially for medium and high power applications. In this paper some modulation strategies for M-phase inverters are compared and the modulation strategy with the minimum switching losses is determined. If the switching devices of the inverter are IGBTs or BJTs, this modulation strategy turns out to be the one with the minimum total power losses. Simulation and experimental results confirm the validity of the analytical approach and the feasibility of the proposed modulation strategy.

   GENERALIZED PWM APPROACH FOR DC CAPACITORS VOLTAGE BALANCING IN DIODE-CLAMPED MULTILEVEL CONVERTERS
By Felipe BOVOLINI GRIGOLETTO, Humberto PINHEIRO [View]
[Download]

Abstract: This paper develops a generalized Pulse Width Modulation approach to eliminate both the low frequency oscillations and imbalances in the dc-link capacitor voltages, which are the main drawbacks of diode clamped converters. The algorithm has been developed within the Carrier-Based PWM framework to facilitate its implementation in diode clamped converters with four or more levels. In addition, a generalized control strategy for the dc voltages control is proposed and its stability is demonstrated. The good performance of the proposed modulation technique is demonstrated from simulation results of a four level diode clamped inverter.

EPE 2009 - Subtopic 06-3 - LS: 'Converter Control Sets and Modulation Strategies'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 06: 'Modulation Strategies and Specific Control Methods for Static Converter' > EPE 2009 - Subtopic 06-3 - LS: 'Converter Control Sets and Modulation Strategies'
	[return to parent folder]

	Design and Experimental Investigation of Space Vector Modulation for Three-leg Four-Wire Voltage Source Inverters By Egon ORTJOHANN, Alaa MOHD, Danny MORTON	[View] [Download]
Abstract: This paper introduces various control functions for three-leg four-wire inverters (These also apply to four leg inverters). These functions are capable of feeding loads even under extreme unbalanced load conditions. As a part of this control strategy the paper is presenting a new approach of SVM for three-leg four-wire voltage-source inverters. The steps for the SVM implementation are identified. The switching vectors, 3-D-SVM diagrams and the boundaryplanes equations, as well as the matrices for the duty cycles and symmetric switching sequences are discussed in detail. Experimental results including different loads are presented to validate the proposed novel space vector modulation control strategy for three-leg four-wire voltage source inverters. These results show that the proposed SVM control schemes can carry out the feeding requirements of unbalanced loads in a very efficient way.

	Carrier-Based PWM with Minimum Power Losses for IGBT Multiphase Inverters By Domenico CASADEI, Michele MENGONI, Giovanni SERRA, Angelo TANI, Luca ZARRI	[View] [Download]
Abstract: Nowadays there is an increasing attention towards multiphase drives, especially for medium and high power applications. In this paper some modulation strategies for M-phase inverters are compared and the modulation strategy with the minimum switching losses is determined. If the switching devices of the inverter are IGBTs or BJTs, this modulation strategy turns out to be the one with the minimum total power losses. Simulation and experimental results confirm the validity of the analytical approach and the feasibility of the proposed modulation strategy.

	GENERALIZED PWM APPROACH FOR DC CAPACITORS VOLTAGE BALANCING IN DIODE-CLAMPED MULTILEVEL CONVERTERS By Felipe BOVOLINI GRIGOLETTO, Humberto PINHEIRO	[View] [Download]
Abstract: This paper develops a generalized Pulse Width Modulation approach to eliminate both the low frequency oscillations and imbalances in the dc-link capacitor voltages, which are the main drawbacks of diode clamped converters. The algorithm has been developed within the Carrier-Based PWM framework to facilitate its implementation in diode clamped converters with four or more levels. In addition, a generalized control strategy for the dc voltages control is proposed and its stability is demonstrated. The good performance of the proposed modulation technique is demonstrated from simulation results of a four level diode clamped inverter.