EPE Association: EPE 2005 - Topic 10-2 - LS: General purpose a.c. and d.c. drives

EPE 2005 - Topic 10-2 - LS: General purpose a.c. and d.c. drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 10: ADJUSTABLE SPEED DRIVES > EPE 2005 - Topic 10-2 - LS: General purpose a.c. and d.c. drives

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   Cost effective solutions to increase the immunity of AC drives against voltage dips
By DHULSTER Frederik; STOCKMAN Kurt; BELMANS Ronnie [View]
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Abstract: This paper describes cost effective solutions to increase the immunity of standard field oriented AC drives against voltage dips. The solutions are based on the classification of dips into three types and an experimental analysis of protection mechanisms applied in commercial drives. For asymmetric diptypes, complete ride-through is obtained by selecting the correct amount of dc link capacitance. For symmetric dips however, field weakening is required to maintain torque control. The performances of field weakening techniques are analyzed with respect to voltage dips. Control of an induction machine is shown to be more difficult compared to a permanent magnet synchronous machine. The methods proposed to reduce the sensitivity of AC drives against voltage dips are verified experimentally.

   Multiple Medium Voltage AC Drives Fed from a Common AC Bus for Single or Multi Motor Conveyor Applications
By JAHN Wolfgang; SEGGEWISS George; RIZZO Steve; TURTON Richard; ZARGARI Navid [View]
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Abstract: AC Drive conveyor applications can be very challenging. The proposed scheme is to connect a medium voltage (2.4kV to 7.2kV) AC drive system to a common AC bus feeding either single or multiple motors. This system exhibits the following advantages: meeting the line side harmonic requirements, use of only one isolation transformer per conveyer system (not per drive), inherent regeneration to the main power source, attractive for down hill conveyor applications. These advantages improve system efficiency, size and allow for the ability to run more than one motor per drive if the need arises. Various identical multi-motor mechanically coupled cases are investigated and motors with differing characteristics supplying separate loads (i.e. mechanically uncoupled). The field experimental results for three different applications of 6.6kV and 4.16kV drives are presented.

   Robust Speed Controller for PMSM based on Artificial Neural Network
By PAJCHROWSKI Tomasz [View]
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Abstract: The paper deals with the problem of robust speed control of permanent magnet synchronous motors. In the paper an artificial neural network (ANN) was applied to design a robust controller. An original method of neural controller synthesis was presented in the paper. Application of this synthesis ensured a robustness of the speed control against variation of moment of inertia. Simulation and laboratory investigation results proved good robustness of the system.

   Rotor Flux Oriented Control of a High Speed Induction Motor Drive Applying a Two-Level Voltage Source Converter with LC- Sine Filter
By BERNET Steffen; MALINOWSKI Mariusz; JALILI Kamran [View]
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Abstract: This paper describes the field oriented control of a High Speed Induction Motor (HSIM) with a Two-Level Voltage Source Converter (2L-VSC) and an LC-filter for a 420V low voltage high speed drive. The filter design procedure to reduce the torque ripple as well as the low frequency models of LC-filter and a combination of HSIM and LC-filter in rotor flux oriented frame are presented. A modified decoupling circuit and the corresponding current regulator parameters are proposed to improve the dynamic performance of a high speed drive connected to an LC-filter fed by a 2L-VSC. The overall system consisting of HSIM, 2L-VSC, LC-filter and a discrete control system is simulated to study the performance of current and speed control loops.

EPE 2005 - Topic 10-2 - LS: General purpose a.c. and d.c. drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 10: ADJUSTABLE SPEED DRIVES > EPE 2005 - Topic 10-2 - LS: General purpose a.c. and d.c. drives
	[return to parent folder]

	Cost effective solutions to increase the immunity of AC drives against voltage dips By DHULSTER Frederik; STOCKMAN Kurt; BELMANS Ronnie	[View] [Download]
Abstract: This paper describes cost effective solutions to increase the immunity of standard field oriented AC drives against voltage dips. The solutions are based on the classification of dips into three types and an experimental analysis of protection mechanisms applied in commercial drives. For asymmetric diptypes, complete ride-through is obtained by selecting the correct amount of dc link capacitance. For symmetric dips however, field weakening is required to maintain torque control. The performances of field weakening techniques are analyzed with respect to voltage dips. Control of an induction machine is shown to be more difficult compared to a permanent magnet synchronous machine. The methods proposed to reduce the sensitivity of AC drives against voltage dips are verified experimentally.

	Multiple Medium Voltage AC Drives Fed from a Common AC Bus for Single or Multi Motor Conveyor Applications By JAHN Wolfgang; SEGGEWISS George; RIZZO Steve; TURTON Richard; ZARGARI Navid	[View] [Download]
Abstract: AC Drive conveyor applications can be very challenging. The proposed scheme is to connect a medium voltage (2.4kV to 7.2kV) AC drive system to a common AC bus feeding either single or multiple motors. This system exhibits the following advantages: meeting the line side harmonic requirements, use of only one isolation transformer per conveyer system (not per drive), inherent regeneration to the main power source, attractive for down hill conveyor applications. These advantages improve system efficiency, size and allow for the ability to run more than one motor per drive if the need arises. Various identical multi-motor mechanically coupled cases are investigated and motors with differing characteristics supplying separate loads (i.e. mechanically uncoupled). The field experimental results for three different applications of 6.6kV and 4.16kV drives are presented.

	Robust Speed Controller for PMSM based on Artificial Neural Network By PAJCHROWSKI Tomasz	[View] [Download]
Abstract: The paper deals with the problem of robust speed control of permanent magnet synchronous motors. In the paper an artificial neural network (ANN) was applied to design a robust controller. An original method of neural controller synthesis was presented in the paper. Application of this synthesis ensured a robustness of the speed control against variation of moment of inertia. Simulation and laboratory investigation results proved good robustness of the system.

	Rotor Flux Oriented Control of a High Speed Induction Motor Drive Applying a Two-Level Voltage Source Converter with LC- Sine Filter By BERNET Steffen; MALINOWSKI Mariusz; JALILI Kamran	[View] [Download]
Abstract: This paper describes the field oriented control of a High Speed Induction Motor (HSIM) with a Two-Level Voltage Source Converter (2L-VSC) and an LC-filter for a 420V low voltage high speed drive. The filter design procedure to reduce the torque ripple as well as the low frequency models of LC-filter and a combination of HSIM and LC-filter in rotor flux oriented frame are presented. A modified decoupling circuit and the corresponding current regulator parameters are proposed to improve the dynamic performance of a high speed drive connected to an LC-filter fed by a 2L-VSC. The overall system consisting of HSIM, 2L-VSC, LC-filter and a discrete control system is simulated to study the performance of current and speed control loops.