EPE Association: EPE 1991 - 21 - Session 2.10: TRACTION 1

EPE 1991 - 21 - Session 2.10: TRACTION 1
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1991 - Conference > EPE 1991 - 21 - Session 2.10: TRACTION 1

   [return to parent folder]

   TRACTION DRIVES WITHOUT SPEED MEASURING DEVICE
By V. Staudt [View]
[Download]

Abstract: A.C. machines in traction applications are normally saturated during voltage controlled operation. Some calculations, which are based on a simple model describing the saturated a.c. machine, indicate possibilities to calculate the stator flux without speed measurement even at stator frequency zero. The new method detects changes of the differential inductances estimated from stator voltages and stator currents. These changes of the differential inductances result from saturation effects. The saturation effects and the stator flux space vector are linked. Therefore a signal processor may be used to calculate the stator flux space vector based on measured quantities of stator voltages and stator currents without any speed measuring device, even at stator frequency zero. Knowing the stator flux and stator current space vectors is sufficient for a fast-response control of torque and flux even of high-performance a.c. drives at all stator frequencies.

   A NEW TRACTION SYSTEM FOR THE PARIS METRO
By J. Bonifas; J. Marchand [View]
[Download]

Abstract: For its future rolling stock, the RATP has chosen a new traction system developped by GEC ALSTHOM. The characteristic features of this system are as follows: induction traction motors, a GTO thyristor voltage source inverter, equipment protected in a leaktight box, cooled by natural convection, A.G.A.T.E. regulation and control electronics, supporting several highly efficient tools for maintenance aid, an opimised pulse width modulation and vector control strategy.

   DEVELOPMENT TRENDS OF HIGH POWER TRACTION CONVERTERS
By Wolfgang Lienau; Wolfgang Runge [View]
[Download]

Abstract: For traction applications the inverter with impressed voltage has achieved a dominating position. First, it was its versatile range of applications from diesel-electric locos to DC and AC fed electric locos, which could be covered with the same converter components. Still in the development stage of forced commutated converters very modular converter designs have been realized. The introduction of GTO technology further promoted the inverter principle with impressed voltage. The modularity of the converter design could be consequently utilized. By means of some outstanding examples of high power traction converters the success in volume reduction by GTO application is demonstrated .

   A 3-PHASE HIGH-POWER GTO-CONVERTER FOR LOCOMOTIVE DRIVE SYSTEMS
By J. Ch. Bendien; W. Krämer [View]
[Download]

Abstract: A high power GTO-inverter for locomotive drives is presented and described. The converter is equipped with 4500V/3000A GTOs in order to deliver a nominal power of 3,6 MV A. The inverter Iosses are calculated by means of a simulation program and component losses are determined for the layout of the cooling system of the inverter. The electrical circuit of the converter, its electrical behaviour and the design of the mechanical system including sensor technology and drive circuits are aim of the presentation. A locomotive of the German Railways (DB) is equipped with this new inverter. Test runs will happen during the second half year 1991.

   A NEW GTO DRIVE FOR H!GH POWER ASYNCHRONOUS MOTORS LOCOMOTIVE
By G. Bocchetti; A. Coffetti; G. Giannini; R. Romano [View]
[Download]

Abstract: In this paper we will describe the characteristics, the design criteria and experimental results of a new power converter for a 6 MW high performance locomotive with asynchronous motors. The drive system consists of two voltage source inverters (one for each motor) fed by a reversible three phase chopper for a regenerative and/or rheostatic brake. Each bogie drive is carried out with a 3 MW multistage converter in order to optimize the number of components with line voltage variable between 2 and 4 kV. In this project many innovative technologies for traction applications have been introduced and developed as GTOs in series operation, forced water cooling, fibre opties for firing and diagnostics signals and low losses snubber circuits.

EPE 1991 - 21 - Session 2.10: TRACTION 1
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1991 - Conference > EPE 1991 - 21 - Session 2.10: TRACTION 1
	[return to parent folder]

	TRACTION DRIVES WITHOUT SPEED MEASURING DEVICE By V. Staudt	[View] [Download]
Abstract: A.C. machines in traction applications are normally saturated during voltage controlled operation. Some calculations, which are based on a simple model describing the saturated a.c. machine, indicate possibilities to calculate the stator flux without speed measurement even at stator frequency zero. The new method detects changes of the differential inductances estimated from stator voltages and stator currents. These changes of the differential inductances result from saturation effects. The saturation effects and the stator flux space vector are linked. Therefore a signal processor may be used to calculate the stator flux space vector based on measured quantities of stator voltages and stator currents without any speed measuring device, even at stator frequency zero. Knowing the stator flux and stator current space vectors is sufficient for a fast-response control of torque and flux even of high-performance a.c. drives at all stator frequencies.

	A NEW TRACTION SYSTEM FOR THE PARIS METRO By J. Bonifas; J. Marchand	[View] [Download]
Abstract: For its future rolling stock, the RATP has chosen a new traction system developped by GEC ALSTHOM. The characteristic features of this system are as follows: induction traction motors, a GTO thyristor voltage source inverter, equipment protected in a leaktight box, cooled by natural convection, A.G.A.T.E. regulation and control electronics, supporting several highly efficient tools for maintenance aid, an opimised pulse width modulation and vector control strategy.

	DEVELOPMENT TRENDS OF HIGH POWER TRACTION CONVERTERS By Wolfgang Lienau; Wolfgang Runge	[View] [Download]
Abstract: For traction applications the inverter with impressed voltage has achieved a dominating position. First, it was its versatile range of applications from diesel-electric locos to DC and AC fed electric locos, which could be covered with the same converter components. Still in the development stage of forced commutated converters very modular converter designs have been realized. The introduction of GTO technology further promoted the inverter principle with impressed voltage. The modularity of the converter design could be consequently utilized. By means of some outstanding examples of high power traction converters the success in volume reduction by GTO application is demonstrated .

	A 3-PHASE HIGH-POWER GTO-CONVERTER FOR LOCOMOTIVE DRIVE SYSTEMS By J. Ch. Bendien; W. Krämer	[View] [Download]
Abstract: A high power GTO-inverter for locomotive drives is presented and described. The converter is equipped with 4500V/3000A GTOs in order to deliver a nominal power of 3,6 MV A. The inverter Iosses are calculated by means of a simulation program and component losses are determined for the layout of the cooling system of the inverter. The electrical circuit of the converter, its electrical behaviour and the design of the mechanical system including sensor technology and drive circuits are aim of the presentation. A locomotive of the German Railways (DB) is equipped with this new inverter. Test runs will happen during the second half year 1991.

	A NEW GTO DRIVE FOR H!GH POWER ASYNCHRONOUS MOTORS LOCOMOTIVE By G. Bocchetti; A. Coffetti; G. Giannini; R. Romano	[View] [Download]
Abstract: In this paper we will describe the characteristics, the design criteria and experimental results of a new power converter for a 6 MW high performance locomotive with asynchronous motors. The drive system consists of two voltage source inverters (one for each motor) fed by a reversible three phase chopper for a regenerative and/or rheostatic brake. Each bogie drive is carried out with a 3 MW multistage converter in order to optimize the number of components with line voltage variable between 2 and 4 kV. In this project many innovative technologies for traction applications have been introduced and developed as GTOs in series operation, forced water cooling, fibre opties for firing and diagnostics signals and low losses snubber circuits.