EPE Association: Pelincec 2005 - 13: Dialog I

Pelincec 2005 - 13: Dialog I - Three-Phase Converters
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > Pelincec 2005 > Pelincec 2005 - 13: Dialog I - Three-Phase Converters

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   OVERMODULATION IN MATRIX CONVERTER
By Janina Rzasa [View]
[Download]

Abstract: This paper deals with overmodulation in matrix converter (MC). Research work consisted in theoretical investigation of obtainable value of voltage transfer ratio in nonlinear control range of MC. Results of simulation tests concerning two control methods allowing operation in overmodulation range are presented. For one of the methods, simulation results were verified by means of laboratory measurements.

   A Review on Matrix Converters
By Domenico Casadei, Giovanni Serra, Angelo Tani, Luca Zarri [View]
[Download]

Abstract: Matrix converter has several attractive features and some companies have shown a particular interest in its commercial exploitation. These paper gives an introduction to its technology and theory. After a brief historical review, the basic hardware solution for the development of matrix converters are presented. An important part of the paper is dedicated to the discussion of the modulation and control strategies developed recently. Finally, some experimental results are given.

   Study of matrix-reactance frequency converter with buck-boost topology
By Zbigniew Fedyczak, Pawel Szczesniak [View]
[Download]

Abstract: This paper deals with a three-phase direct matrixreactance frequency converter (MRFC) with buck-boost topology and includes a description of its topology and operation plus presentation of the results of an investigation of its properties . Presented too is a conceptual development of the frequency converter based on a buck-boost matrix-reactance chopper (MRC) with source switches arranged as in a matrix converter (MC). The averaged state space method is used in the analysis. In the control circuit, a classical control strategy, attributable to Venturini, is used for the study of the presented conception. Furthermore, some simulation test results are also presented in order to verify the results of the theoretical analysis.

   Control Schemes for Interconnected Three-Phase Current Source Inverter
By Shoji Iida, Takashi Kaimi, Shigeo Masukawa [View]
[Download]

Abstract: In this paper, we propose several control schemes for the three-phase current source inverter interconnecting the dispersed dc source to the utility. They have in common the control patterns with overlapping signals partially into two switching devices in the same polarity arms. The first is the basic scheme. The next is one by improving the basic. The third is the modified scheme for the second. The optimum control scheme combined with the second and the third is proposed finally. Several experimental discussions are presented.

   Control of Single-Phase to Three-Phase AC/DC/AC PWM Converters for Induction Motor Drives
By Dong-Choon Lee, Young-Sin Kim [View]
[Download]

Abstract: This paper proposes a control scheme of single-phase to three-phase PWM converters for low power three-phase induction motor drives, where a single-phase half-bridge PWM rectifier and a two-leg inverter are used. With this converter topology, the number of switching devices is reduced to six from ten in case of full-bridge rectifier and three-leg inverter systems. In addition, the source voltage sensor is eliminated with a state observer which controls the deviation between the model current and the system current to be zero. A simple voltage modulation method is used for a two-leg inverter and a new technique to eliminate the effect of the dc link ripple voltage on the output current is proposed. Though the converter topology itself is of lower cost than the conventional one, it retains such functions as sinusoidal input current, unity power factor, dc-link voltage control, bidirectional power flow, and VVVF output voltage. The experimental results for the V/F control of 3Hp induction motor drives controlled by a DSP TMS320C31 chip have verified the effectiveness of the proposed scheme.

   Impact of Control Model Deviations on the Minimization of the DC Link Capacitance in AC-DC-AC Converters for Low Voltage Drives
By Manfred Winkelnkemper, Steffen Bernet [View]
[Download]

Abstract: This paper presents the investigations on the minimization of the dc link capacitance in ac-dc-ac converters for induction motor (IM) drives. The minimization is achieved by fast input-output power control. Furthermore, a major focus of this paper is the deviations of the system models from the real system and its effect on predictive output power estimation. The impact of estimation errors, parameter mismatches and input saturation on the dc link voltage step response were investigated. Simulation results are verified by experimental results obtained from a 15kVA induction motor drive with a dc link capacitance of only 80ìF.

   A Novel Linear Observer of Three Phase Converter with Measuring Average DC Link Current
By Xiaofeng Sun, Zhe Chen, Baocheng Wang, Weiyang Wu [View]
[Download]

Abstract: This paper deals with the estimation problem in a three-phase converter using a linear observer. In general, most of the schemes used to control the three phase voltage source converter assume the exact full state information provide by a set of sensors. However, from a practical point of view, it is useful to explore the possibility of reducing the number of sensors, or even using the soft sensors as back up for security purposes. On the basis of some structural properties of the converter, it can be mathematically shown that it is possible to design such estimators. In this light, a linear mathematical model observer with the average dc current is proposed. Simulations and experiment results are shown to demonstrate the performances of these soft sensors.

   A DIGITAL SIGNAL PROCESSOR CONTROLLED EQUIPMENT, FOR TRACTION MOTORS VOLTAGE CONTROL, ON SOME ELECTRIC LOCOMOTIVES
By Constantin Pãtrascu, Rãzvan Prejbeanu, Mihai Rãdulescu [View]
[Download]

Abstract: This equipment described in this paper may be implemented on all electric locomotives, to which the traction motors voltage adjustment is done by a tap-changer, by replacing the associated driving DC motor with an AC asynchronous motor supplied from a static converter. This equipment is controlled by a DSP and may be integrated into a complex system for the locomotive control.

   HVAC - NEW EQUIPMENT FOR RAILWAY COACHES SUPPLIED FROM THE MAIN TRACTION GENERATOR OF THE DIESEL-ELECTRIC LOCOMOTIVE
By Rãzvan Prejbeanu, Constantin Pãtrascu, Mihail Rãdulescu [View]
[Download]

Abstract: This paper presents a new and high quality solution meant to replace the traditional heating system of passenger cars (on the old types of diesel-electric locomotives) based on a steam or electric heating car supplmied from a seperate diesel engine - generator group. A structure based on a power electronics converter which supplies the train heating and air conditioning system with a single-phase alternative voltage of 1500 V, 50 Hz or of 1000 V, 16 2/3 Hz is presented. The DC traction generator of the diesel electric locomotive supplies both the power for the train traction, with variable voltage depending on traction requirements and the power for train heating system.

Pelincec 2005 - 13: Dialog I - Three-Phase Converters
You are here: EPE Documents > 05 - EPE Supported Conference Proceedings > Pelincec 2005 > Pelincec 2005 - 13: Dialog I - Three-Phase Converters
	[return to parent folder]

	OVERMODULATION IN MATRIX CONVERTER By Janina Rzasa	[View] [Download]
Abstract: This paper deals with overmodulation in matrix converter (MC). Research work consisted in theoretical investigation of obtainable value of voltage transfer ratio in nonlinear control range of MC. Results of simulation tests concerning two control methods allowing operation in overmodulation range are presented. For one of the methods, simulation results were verified by means of laboratory measurements.

	A Review on Matrix Converters By Domenico Casadei, Giovanni Serra, Angelo Tani, Luca Zarri	[View] [Download]
Abstract: Matrix converter has several attractive features and some companies have shown a particular interest in its commercial exploitation. These paper gives an introduction to its technology and theory. After a brief historical review, the basic hardware solution for the development of matrix converters are presented. An important part of the paper is dedicated to the discussion of the modulation and control strategies developed recently. Finally, some experimental results are given.

	Study of matrix-reactance frequency converter with buck-boost topology By Zbigniew Fedyczak, Pawel Szczesniak	[View] [Download]
Abstract: This paper deals with a three-phase direct matrixreactance frequency converter (MRFC) with buck-boost topology and includes a description of its topology and operation plus presentation of the results of an investigation of its properties . Presented too is a conceptual development of the frequency converter based on a buck-boost matrix-reactance chopper (MRC) with source switches arranged as in a matrix converter (MC). The averaged state space method is used in the analysis. In the control circuit, a classical control strategy, attributable to Venturini, is used for the study of the presented conception. Furthermore, some simulation test results are also presented in order to verify the results of the theoretical analysis.

	Control Schemes for Interconnected Three-Phase Current Source Inverter By Shoji Iida, Takashi Kaimi, Shigeo Masukawa	[View] [Download]
Abstract: In this paper, we propose several control schemes for the three-phase current source inverter interconnecting the dispersed dc source to the utility. They have in common the control patterns with overlapping signals partially into two switching devices in the same polarity arms. The first is the basic scheme. The next is one by improving the basic. The third is the modified scheme for the second. The optimum control scheme combined with the second and the third is proposed finally. Several experimental discussions are presented.

	Control of Single-Phase to Three-Phase AC/DC/AC PWM Converters for Induction Motor Drives By Dong-Choon Lee, Young-Sin Kim	[View] [Download]
Abstract: This paper proposes a control scheme of single-phase to three-phase PWM converters for low power three-phase induction motor drives, where a single-phase half-bridge PWM rectifier and a two-leg inverter are used. With this converter topology, the number of switching devices is reduced to six from ten in case of full-bridge rectifier and three-leg inverter systems. In addition, the source voltage sensor is eliminated with a state observer which controls the deviation between the model current and the system current to be zero. A simple voltage modulation method is used for a two-leg inverter and a new technique to eliminate the effect of the dc link ripple voltage on the output current is proposed. Though the converter topology itself is of lower cost than the conventional one, it retains such functions as sinusoidal input current, unity power factor, dc-link voltage control, bidirectional power flow, and VVVF output voltage. The experimental results for the V/F control of 3Hp induction motor drives controlled by a DSP TMS320C31 chip have verified the effectiveness of the proposed scheme.

	Impact of Control Model Deviations on the Minimization of the DC Link Capacitance in AC-DC-AC Converters for Low Voltage Drives By Manfred Winkelnkemper, Steffen Bernet	[View] [Download]
Abstract: This paper presents the investigations on the minimization of the dc link capacitance in ac-dc-ac converters for induction motor (IM) drives. The minimization is achieved by fast input-output power control. Furthermore, a major focus of this paper is the deviations of the system models from the real system and its effect on predictive output power estimation. The impact of estimation errors, parameter mismatches and input saturation on the dc link voltage step response were investigated. Simulation results are verified by experimental results obtained from a 15kVA induction motor drive with a dc link capacitance of only 80ìF.

	A Novel Linear Observer of Three Phase Converter with Measuring Average DC Link Current By Xiaofeng Sun, Zhe Chen, Baocheng Wang, Weiyang Wu	[View] [Download]
Abstract: This paper deals with the estimation problem in a three-phase converter using a linear observer. In general, most of the schemes used to control the three phase voltage source converter assume the exact full state information provide by a set of sensors. However, from a practical point of view, it is useful to explore the possibility of reducing the number of sensors, or even using the soft sensors as back up for security purposes. On the basis of some structural properties of the converter, it can be mathematically shown that it is possible to design such estimators. In this light, a linear mathematical model observer with the average dc current is proposed. Simulations and experiment results are shown to demonstrate the performances of these soft sensors.

	A DIGITAL SIGNAL PROCESSOR CONTROLLED EQUIPMENT, FOR TRACTION MOTORS VOLTAGE CONTROL, ON SOME ELECTRIC LOCOMOTIVES By Constantin Pãtrascu, Rãzvan Prejbeanu, Mihai Rãdulescu	[View] [Download]
Abstract: This equipment described in this paper may be implemented on all electric locomotives, to which the traction motors voltage adjustment is done by a tap-changer, by replacing the associated driving DC motor with an AC asynchronous motor supplied from a static converter. This equipment is controlled by a DSP and may be integrated into a complex system for the locomotive control.

	HVAC - NEW EQUIPMENT FOR RAILWAY COACHES SUPPLIED FROM THE MAIN TRACTION GENERATOR OF THE DIESEL-ELECTRIC LOCOMOTIVE By Rãzvan Prejbeanu, Constantin Pãtrascu, Mihail Rãdulescu	[View] [Download]
Abstract: This paper presents a new and high quality solution meant to replace the traditional heating system of passenger cars (on the old types of diesel-electric locomotives) based on a steam or electric heating car supplmied from a seperate diesel engine - generator group. A structure based on a power electronics converter which supplies the train heating and air conditioning system with a single-phase alternative voltage of 1500 V, 50 Hz or of 1000 V, 16 2/3 Hz is presented. The DC traction generator of the diesel electric locomotive supplies both the power for the train traction, with variable voltage depending on traction requirements and the power for train heating system.