EPE Association: EPE 1991 - 04 - Session 1.4: CONVERTERS SIMULATION

EPE 1991 - 04 - Session 1.4: CONVERTERS SIMULATION
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   CIRCUIT ORIENTED SIMULATION OF POWER SEMICONDUCTOR USING SUCCESS. APPLICATION TO DIODES AND BIPOLAR TRANSISTORS
By Batard; Meynard; Foch; Massol [View]
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Abstract: The S.U.C.C.E.S.S. software intended for global power circuit simulation is used with a somewhat new aim in view : is it possible to zoom in progressively certain parts of the circuits to understand second order phenomena related to the parasitics of the componems, the impedance of the sources, the non-ideal firing circuits, the technology of the switches...?

   Digital Real-Time Simulation of a Converter-Fed Motor
By M. Rebhan [View]
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Abstract: Digital real-time simulation of power electronics components requires high resolution with respect to time, and hence enormously high computing capacities. A multi-signal processor system was used for simulating a converter-fed motor. The models of the physical subunits line-side converter (rectifier), machine-side converter (inverter) and synchronous machine are computed on the individual digital signal processors (DSPs). Familiar iteration processes had to be modified for the algorithmic coupling of these units in order not to infringe the real-time condition. The communication between the DSPs takes place via a special high-speed bus and dualported memory. The real-time simulator is integrated in the analog environment by means of AID and DIA converters.

   NON-LINEAR TRANSMISSION-LINE MODELLING TECHNIQUE FOR MODELLING POWER ELECTRONIC CIRCUITS
By S. Y. R. Hui; C. Christopoulos [View]
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Abstract: This paper describes a new non-linear transmission-line modelling technique that can be employed to model power electronic circuits. The non-linearities that can be dealt with include the switching action of the power devices as well as the non-linear behaviour of saturable inductors and non-linear capacitors. With this new non-linear technique, the transmission-line modelling (TLM) technique can be used as a generalised discrete-time modelling tool for power electronic circuits. The non-linear technique is demonstrated in two examples and the simulations are found to be satisfactory.

   POWER ELECTRONIC SIMULATION USING BOND GRAPHS AND TRANSMISSION LINE MOOELLING
By G. M. Asher; W. F. Ray; V. Eslamdoost [View]
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Abstract: This paper reports on a novel power electronic circuit simulation package incorporating two new techniques. The first is the use of Bond Graphs for the efficient and flexible formulation of equation structure by means of the Junction Structure Matrix. The second is the Transmission Line Modelling (TLM) technique which provides the capabilities for last stable solution of the equations. Brief summaries of the concepts are given. The package implementation of the TLM algorithm is described and validated wlth a modeling study of 3 phase bridge feeding a capacitor load. The use of the techniques for a generalized package Is discussed.

   A NOVEL MULTILEVEL STRUCTURE FOR VOLTAGE SOURCE INVERTER
By M. Carpita; S. Tenconi; M. Fracchia [View]
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Abstract: A novel structure for a multilevel voltage source inverter (patent pending) is presented. The scheme, which generalizes the well-known NPC five voltage levels inverter, lncludes a capacitive voltage divider, realized by n elementar RC filters and 2n switches for every branch. This structure presents two important advantages: an output voltage harmonic content reduction and the fact that, in every possible switch configuration, each solid state switch has to withstand a maximum voltage equal to 1/n of that the DC link (excluding turn-off overvoltages) without requirements of dynamic voltage sharing at turn-on or turn-off (no devices in series). The schema developed is illustrated, and digital simulatlon results obtained by means of general purpose EMTP program are presented and discussed.

   COMPONENTS: REDUCING CONDUCTION LOSSES
By Jean-Marie Peter; Jean-Marie Charreton [View]
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Abstract: Thanks to the latest progresses in converter topologies, the switch-off losses have been dramatically reduced. Now, the challenge is the reduction of the conduction losses. The authors show, how associating a low drop IGBT for conduction time, and a MOSFET for switch-off, it is possible to reduce conduction losses in an economical way.

EPE 1991 - 04 - Session 1.4: CONVERTERS SIMULATION
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1991 - Conference > EPE 1991 - 04 - Session 1.4: CONVERTERS SIMULATION
	[return to parent folder]

	CIRCUIT ORIENTED SIMULATION OF POWER SEMICONDUCTOR USING SUCCESS. APPLICATION TO DIODES AND BIPOLAR TRANSISTORS By Batard; Meynard; Foch; Massol	[View] [Download]
Abstract: The S.U.C.C.E.S.S. software intended for global power circuit simulation is used with a somewhat new aim in view : is it possible to zoom in progressively certain parts of the circuits to understand second order phenomena related to the parasitics of the componems, the impedance of the sources, the non-ideal firing circuits, the technology of the switches...?

	Digital Real-Time Simulation of a Converter-Fed Motor By M. Rebhan	[View] [Download]
Abstract: Digital real-time simulation of power electronics components requires high resolution with respect to time, and hence enormously high computing capacities. A multi-signal processor system was used for simulating a converter-fed motor. The models of the physical subunits line-side converter (rectifier), machine-side converter (inverter) and synchronous machine are computed on the individual digital signal processors (DSPs). Familiar iteration processes had to be modified for the algorithmic coupling of these units in order not to infringe the real-time condition. The communication between the DSPs takes place via a special high-speed bus and dualported memory. The real-time simulator is integrated in the analog environment by means of AID and DIA converters.

	NON-LINEAR TRANSMISSION-LINE MODELLING TECHNIQUE FOR MODELLING POWER ELECTRONIC CIRCUITS By S. Y. R. Hui; C. Christopoulos	[View] [Download]
Abstract: This paper describes a new non-linear transmission-line modelling technique that can be employed to model power electronic circuits. The non-linearities that can be dealt with include the switching action of the power devices as well as the non-linear behaviour of saturable inductors and non-linear capacitors. With this new non-linear technique, the transmission-line modelling (TLM) technique can be used as a generalised discrete-time modelling tool for power electronic circuits. The non-linear technique is demonstrated in two examples and the simulations are found to be satisfactory.

	POWER ELECTRONIC SIMULATION USING BOND GRAPHS AND TRANSMISSION LINE MOOELLING By G. M. Asher; W. F. Ray; V. Eslamdoost	[View] [Download]
Abstract: This paper reports on a novel power electronic circuit simulation package incorporating two new techniques. The first is the use of Bond Graphs for the efficient and flexible formulation of equation structure by means of the Junction Structure Matrix. The second is the Transmission Line Modelling (TLM) technique which provides the capabilities for last stable solution of the equations. Brief summaries of the concepts are given. The package implementation of the TLM algorithm is described and validated wlth a modeling study of 3 phase bridge feeding a capacitor load. The use of the techniques for a generalized package Is discussed.

	A NOVEL MULTILEVEL STRUCTURE FOR VOLTAGE SOURCE INVERTER By M. Carpita; S. Tenconi; M. Fracchia	[View] [Download]
Abstract: A novel structure for a multilevel voltage source inverter (patent pending) is presented. The scheme, which generalizes the well-known NPC five voltage levels inverter, lncludes a capacitive voltage divider, realized by n elementar RC filters and 2n switches for every branch. This structure presents two important advantages: an output voltage harmonic content reduction and the fact that, in every possible switch configuration, each solid state switch has to withstand a maximum voltage equal to 1/n of that the DC link (excluding turn-off overvoltages) without requirements of dynamic voltage sharing at turn-on or turn-off (no devices in series). The schema developed is illustrated, and digital simulatlon results obtained by means of general purpose EMTP program are presented and discussed.

	COMPONENTS: REDUCING CONDUCTION LOSSES By Jean-Marie Peter; Jean-Marie Charreton	[View] [Download]
Abstract: Thanks to the latest progresses in converter topologies, the switch-off losses have been dramatically reduced. Now, the challenge is the reduction of the conduction losses. The authors show, how associating a low drop IGBT for conduction time, and a MOSFET for switch-off, it is possible to reduce conduction losses in an economical way.