EPE Association: EPE 1989 - 03 - Lecture Session 1.3: TRACTION DRIVES

EPE 1989 - 03 - Lecture Session 1.3: TRACTION DRIVES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1989 - Conference > EPE 1989 - 03 - Lecture Session 1.3: TRACTION DRIVES

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   DIESEL-ELECTRIC LOCOMOTIVE F69PH WITH AC THREE-PHASE POWER TRANSMISSION SYSTEM
By Josef Wolfgang Fischer [View]
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Abstract: The new developments in the field of three-phase drives for rail vehicles are described by means of the power transmission system for the high-speed, 4-axle F69PH locomotive as developed jointly by General Motors (GM) and Siemens AG for Amtrak, USA. Traction converters, which are of voltage-source inverter type with gate-turnoff thyristors, supply power to the squirrel-cage three-phase induction motors which are connected in parallel within each bogie. In addition to the two traction inverters, a third inverter is installed in order to supply power to the passenger cars. All three inverters are identical and utilize the evaporation bath cooling method to dissipate the heat caused by the electrical losses. The locomotive, as well as the inverters, are microprocessor controlled.

   DPI-FED INDUCTION MOTOR DRIVE FOR RAILWAY APPLICATIONS - BRAKING ABOVE RATED SPEED AT RATED TORQUE
By B. Sneyers; Ph. Lataire; G. Maggetto; B. Detemmerman; J. M. Bodson [View]
[Download]

Abstract: The traction drive made out of an induction motor fed by a DPI (Direct PWM Inverter) using GTO's and directly connected to the DC main has significant advantages compared to other solutions. Up to now, the main problem was the limited braking torque available at high speed operation. The best way for achieving this objective is to maintain the magnetizing flux above the nominal speed. This induces a motor voltage that leads to a DC voltage level higher than the DC line voltage. This paper presents methods to improve the braking torque and compares the solutions on a 100 kW prototype. The economical aspects of the problems are discussed as well.

   DIRECT SELF-CONTROL (DSC), A NOVEL METHOD OF CONTROLLING ASYNCHRONOUS MACHINES IN TRACTION APPLICATIONS
By M. Jänecke; R. Kremer; G. Steuerwald [View]
[Download]

Abstract: Direct self-control (DSC) is a highly dynamic method of controlling inverter-fed asynchronous machines, where the status of the inverter is derived direct from the calculated actual values of stator flux and torque. This method, with optimal pulse frequency, is especially outstanding in the region of high power applications, where only relatively low switching frequencies are possible on account of the losses of the semi conductor elements.

   DRIVE CONTROL OF A GTO PULSE WIDTH INVERTER FOR VEHICLES WITH uP PULSE PATTERN GENERATORS
By P. Holweck; J. leistikow; V. Strönisch [View]
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Abstract: The drive control with uP pulse pattern generator is described using the example of a traction drive for a trolley-bus with a GTO pulse width modulated inverter. The control process utilized corresponds to the dynamic demands with rise times of approximately 20 ms. It is based on stationary decoupled flux and torque control. The determination of an appropriate pulse pattern process for a drive system is dependent on the economically and technologically expedient switching frequency of the power semiconductors and the required level of voltage utilization which is derived from the rated motor voltage and the supply voltage of the converter. The value of the maximum motor frequency and the need of reducing the total harmonic distortion in current and torque complete the requirement profile of the pulse pattern generator. The realization was conducted in a two-processor interconnected system.

   CONTRIBUTION OF MICROCOMPUTER CONTROL TO INDUSTRIAL AND TRACTION AC MOTOR DRIVE
By L. Denoncin [View]
[Download]

Abstract: The difficulties encountered when trying to get high performance control of ac motors at low speed are well known, owing to the difficulties to get accurate measurement of the motor flux in such conditions. This paper presents a solution to this problem by using a microcomputer model for the motor flux. Briefly, this model consists in a forecasting open loop algorithm taking into account current, speed and other parameters of the motor. At higher speed, flux measurement becomes more accurate and can be used by a correction algorithm in order to improve the forecasting of the flux vector. Illustrations of the method are given in various industrial and traction applications and specially for high power drives using asynchronous or synchronous motors.

   A SIMPLE METHOD OF CALCULATING INVERTER DC SIDE CURRENT HARMONICS
By J. A Taufiq; Jin Xiaoping; J. Allen; S. Burdett [View]
[Download]

Abstract: This paper presents a new frequency domain method of calculating the dc input current harmonics of a voltage source inverter (VSI) drive, a knowledge of which is particularly important in some applications such as railway traction. This method is much faster than the time domain simulation methods commonly used to calculate the relevant wavefoms and harmonic spectra. The paper shows that this frequency domain method can also be extended to include the effects of inverter delay and turn-off times as well as snubber charge-up effects.

EPE 1989 - 03 - Lecture Session 1.3: TRACTION DRIVES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1989 - Conference > EPE 1989 - 03 - Lecture Session 1.3: TRACTION DRIVES
	[return to parent folder]

	DIESEL-ELECTRIC LOCOMOTIVE F69PH WITH AC THREE-PHASE POWER TRANSMISSION SYSTEM By Josef Wolfgang Fischer	[View] [Download]
Abstract: The new developments in the field of three-phase drives for rail vehicles are described by means of the power transmission system for the high-speed, 4-axle F69PH locomotive as developed jointly by General Motors (GM) and Siemens AG for Amtrak, USA. Traction converters, which are of voltage-source inverter type with gate-turnoff thyristors, supply power to the squirrel-cage three-phase induction motors which are connected in parallel within each bogie. In addition to the two traction inverters, a third inverter is installed in order to supply power to the passenger cars. All three inverters are identical and utilize the evaporation bath cooling method to dissipate the heat caused by the electrical losses. The locomotive, as well as the inverters, are microprocessor controlled.

	DPI-FED INDUCTION MOTOR DRIVE FOR RAILWAY APPLICATIONS - BRAKING ABOVE RATED SPEED AT RATED TORQUE By B. Sneyers; Ph. Lataire; G. Maggetto; B. Detemmerman; J. M. Bodson	[View] [Download]
Abstract: The traction drive made out of an induction motor fed by a DPI (Direct PWM Inverter) using GTO's and directly connected to the DC main has significant advantages compared to other solutions. Up to now, the main problem was the limited braking torque available at high speed operation. The best way for achieving this objective is to maintain the magnetizing flux above the nominal speed. This induces a motor voltage that leads to a DC voltage level higher than the DC line voltage. This paper presents methods to improve the braking torque and compares the solutions on a 100 kW prototype. The economical aspects of the problems are discussed as well.

	DIRECT SELF-CONTROL (DSC), A NOVEL METHOD OF CONTROLLING ASYNCHRONOUS MACHINES IN TRACTION APPLICATIONS By M. Jänecke; R. Kremer; G. Steuerwald	[View] [Download]
Abstract: Direct self-control (DSC) is a highly dynamic method of controlling inverter-fed asynchronous machines, where the status of the inverter is derived direct from the calculated actual values of stator flux and torque. This method, with optimal pulse frequency, is especially outstanding in the region of high power applications, where only relatively low switching frequencies are possible on account of the losses of the semi conductor elements.

	DRIVE CONTROL OF A GTO PULSE WIDTH INVERTER FOR VEHICLES WITH uP PULSE PATTERN GENERATORS By P. Holweck; J. leistikow; V. Strönisch	[View] [Download]
Abstract: The drive control with uP pulse pattern generator is described using the example of a traction drive for a trolley-bus with a GTO pulse width modulated inverter. The control process utilized corresponds to the dynamic demands with rise times of approximately 20 ms. It is based on stationary decoupled flux and torque control. The determination of an appropriate pulse pattern process for a drive system is dependent on the economically and technologically expedient switching frequency of the power semiconductors and the required level of voltage utilization which is derived from the rated motor voltage and the supply voltage of the converter. The value of the maximum motor frequency and the need of reducing the total harmonic distortion in current and torque complete the requirement profile of the pulse pattern generator. The realization was conducted in a two-processor interconnected system.

	CONTRIBUTION OF MICROCOMPUTER CONTROL TO INDUSTRIAL AND TRACTION AC MOTOR DRIVE By L. Denoncin	[View] [Download]
Abstract: The difficulties encountered when trying to get high performance control of ac motors at low speed are well known, owing to the difficulties to get accurate measurement of the motor flux in such conditions. This paper presents a solution to this problem by using a microcomputer model for the motor flux. Briefly, this model consists in a forecasting open loop algorithm taking into account current, speed and other parameters of the motor. At higher speed, flux measurement becomes more accurate and can be used by a correction algorithm in order to improve the forecasting of the flux vector. Illustrations of the method are given in various industrial and traction applications and specially for high power drives using asynchronous or synchronous motors.

	A SIMPLE METHOD OF CALCULATING INVERTER DC SIDE CURRENT HARMONICS By J. A Taufiq; Jin Xiaoping; J. Allen; S. Burdett	[View] [Download]
Abstract: This paper presents a new frequency domain method of calculating the dc input current harmonics of a voltage source inverter (VSI) drive, a knowledge of which is particularly important in some applications such as railway traction. This method is much faster than the time domain simulation methods commonly used to calculate the relevant wavefoms and harmonic spectra. The paper shows that this frequency domain method can also be extended to include the effects of inverter delay and turn-off times as well as snubber charge-up effects.