EPE Association: EPE 2001 - Topic 11b: Energy System Management, User Applications Experiences, Modelling and Simulation

EPE 2001 - Topic 11b: Energy System Management, User Applications Experiences, Modelling and Simulation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2001 - Conference > EPE 2001 - Topic 11: SYSTEMS ENGINEERING > EPE 2001 - Topic 11b: Energy System Management, User Applications Experiences, Modelling and Simulation

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   Bond Graph multi time scale analysis of a railway traction system
By G. Gandanegara; B. Sareni; X. Roboam; G. Dauphin-Tanguy [View]
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Abstract: The unified formalism of bond graphs is applicable to designing, modeling and analyzing complex and heterogeneous physical systems. Moreover, various order-reduction methods can be applied directly on bond graph models in order to simplify them. The aim of this paper is to demonstrate the characteristics and the advantages of the bond graph formalism, considering as an example, model simplification methods of a railway traction system. Several simulations are carried out in order to validate the simplified models. The analysis of couplings on these models highlights the elements that cause perturbations, such as mechanical resonance.

   Contactless inductive energy transmission systems with large air gap
By R. Mecke [View]
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Abstract: Contactless inductive energy transmission over a large air gap becomes more and more attractive for different applications. The paper investigates the influence of geometrical and electrical parameters on energy transmission of different contactless magnetic assemblies with air gaps of several centimetres. The investigations are carried out by means of flux simulation and measurements. Especially the dimensions of the primary and secondary system, the air gap lenght and the number of turns determine the transmission behaviour. The efficiency of contactless energy transmission systems is mainly influenced by the transmission frequency. In particular the efficiency of systems with a large air gap can be considerably improved by using higher transmission frequencies in the range of approximately 100 kHz. Therefore, a high frequency phase-shifted controlled IGBT-inverter is developed.

   Role of busbar as interconnection:study of current sharing
By M.Besacier; J.L.Schanen; J.Roudet [View]
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Abstract: Busbar structure is commonly used in power electronics applications, due to its low inductance. However, although its low impedance, the busbar geometry can sometimes lead to unbalanced current in paralleled components (power switches, capacitors...). This paper starts with the best way to provide an electrical equivalent scheme of this component. It will be shown that some coupled resistive effects influence current sharing, and must be taken into account in the modeling: an original method is given to account for this phenomenon in common circuit simulators. Some solutions to balance current with modification of busbar geometry is presented This method is applied to an industrial busbar. Experimental validation are brought, in frequency and time domain.

EPE 2001 - Topic 11b: Energy System Management, User Applications Experiences, Modelling and Simulation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2001 - Conference > EPE 2001 - Topic 11: SYSTEMS ENGINEERING > EPE 2001 - Topic 11b: Energy System Management, User Applications Experiences, Modelling and Simulation
	[return to parent folder]

	Bond Graph multi time scale analysis of a railway traction system By G. Gandanegara; B. Sareni; X. Roboam; G. Dauphin-Tanguy	[View] [Download]
Abstract: The unified formalism of bond graphs is applicable to designing, modeling and analyzing complex and heterogeneous physical systems. Moreover, various order-reduction methods can be applied directly on bond graph models in order to simplify them. The aim of this paper is to demonstrate the characteristics and the advantages of the bond graph formalism, considering as an example, model simplification methods of a railway traction system. Several simulations are carried out in order to validate the simplified models. The analysis of couplings on these models highlights the elements that cause perturbations, such as mechanical resonance.

	Contactless inductive energy transmission systems with large air gap By R. Mecke	[View] [Download]
Abstract: Contactless inductive energy transmission over a large air gap becomes more and more attractive for different applications. The paper investigates the influence of geometrical and electrical parameters on energy transmission of different contactless magnetic assemblies with air gaps of several centimetres. The investigations are carried out by means of flux simulation and measurements. Especially the dimensions of the primary and secondary system, the air gap lenght and the number of turns determine the transmission behaviour. The efficiency of contactless energy transmission systems is mainly influenced by the transmission frequency. In particular the efficiency of systems with a large air gap can be considerably improved by using higher transmission frequencies in the range of approximately 100 kHz. Therefore, a high frequency phase-shifted controlled IGBT-inverter is developed.

	Role of busbar as interconnection:study of current sharing By M.Besacier; J.L.Schanen; J.Roudet	[View] [Download]
Abstract: Busbar structure is commonly used in power electronics applications, due to its low inductance. However, although its low impedance, the busbar geometry can sometimes lead to unbalanced current in paralleled components (power switches, capacitors...). This paper starts with the best way to provide an electrical equivalent scheme of this component. It will be shown that some coupled resistive effects influence current sharing, and must be taken into account in the modeling: an original method is given to account for this phenomenon in common circuit simulators. Some solutions to balance current with modification of busbar geometry is presented This method is applied to an industrial busbar. Experimental validation are brought, in frequency and time domain.