EPE Association: EPE 2003 - Topic 09c: Linear Machines and Drives

EPE 2003 - Topic 09c: Linear Machines and Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2003 - Conference > EPE 2003 - Topic 09: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 2003 - Topic 09c: Linear Machines and Drives

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   Control strategy for a novel combined operation of long stator and short stator linear drive system
By B. Yang; H. Grotstollen [View]
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Abstract: To realize a highly flexible propulsion system, a combined drive of long stator and short stator linear motors is applied to operate vehicles of the NBP (Neue Bahntechnik Paderborn, i.e. New Rail Technology of Paderborn in English) railway system. The control strategy of this combination is described. The presented experimental results, which show the control performance, are based on extensive theoretical investigations.

   Combined-levitation-and-propulsion control of SLIM Maglev vehicle on flexible guideway
By K. Yoshida; T. Yoshida; K. Noda [View]
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Abstract: Based on the decoupled control method of attractive-normal and thrust forces in a single-sided linear induction motor (SLIM), a compact combined-levitation-and-propulsion SLIM Maglev vehicle can be realized without any additional levitation magnet. In a Maglev system, if the distance between two pillars of the guideway is long compared with the vehicle length, a vibration of the guideway is one of the most important problems to be solved. This paper presents a combined-levitation-and-propulsion control to suppress the guideway vibration in Maglev vehicle realized by SLIM only. For very difficult levitation control combined with propulsion, much more accurate airgap length has been estimated from measured one by sensor and short-primary end effects on attractive levitation force has been taken into account. Experimental results has shown that the vehicle can be stably propelled and levitated simultaneously on the flexible guideway.

   Sensorless control of a 2.4 MW linear synchronous motor for loanching roller-coasters
By A. Veltman; P. van der Hulst; M.C.P. Jonker; J.P. van Gurp [View]
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Abstract: An accurate method for estimating the position of a large Linear Synchronous Motor, based on on-line measured phase currents and voltages is shown. Synchronous frame ﬁlters remove the fundamental component from these signals eﬀectively, even during fast acceleration. The proposed correlators estimate local parameter values, inductance and resistance, from the remaining switching ripple signals with high bandwidth, able to follow the abrupt changes caused by block switching of the long stator. Experimental results show that a controlled start from standstill is possible.

   A novel direct drive system for textile winding applications
By N. Jakeman; W. Bullough; C. Bingham; P. Mellor [View]
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Abstract: The paper describes the specification, modelling, magnetic design, thermal characteristics and control of a novel, high acceleration (up to 82g) brushless PM linear actuator with Halbach array, for textile package winding applications. Experimental results demonstrate the realisation of the actuator and induced performance advantages afforded to the phase lead, closed-loop position control scheme.

   The excitation patterns and torque characteristic of moving-magnet-type surface motor
By J. Tsuchiya; G. Kimura [View]
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Abstract: Several types of surface motors (SFMs) which have the ability to perform surface motion have been proposed. However, most SFMs are limited in movement, because the movers used depend on electrical wires to supply the operating current. The authors have proposed a new type of SFM that does not require wires to be connected to the mover. The most advantageous feature of this new type of SFM is that the mover can perform rotation in addition to linear motion on a plane surface. This SFM could be used for applications in a sealed space, because the mover and the stator are completely separate. In this paper, the structure of this SFM and the movement principle are described. The torque characteristics of each excitation pattern are experimentally measured, and, as a result, the optimum excitation pattern for rotational motion is obtained.

EPE 2003 - Topic 09c: Linear Machines and Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2003 - Conference > EPE 2003 - Topic 09: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 2003 - Topic 09c: Linear Machines and Drives
	[return to parent folder]

	Control strategy for a novel combined operation of long stator and short stator linear drive system By B. Yang; H. Grotstollen	[View] [Download]
Abstract: To realize a highly flexible propulsion system, a combined drive of long stator and short stator linear motors is applied to operate vehicles of the NBP (Neue Bahntechnik Paderborn, i.e. New Rail Technology of Paderborn in English) railway system. The control strategy of this combination is described. The presented experimental results, which show the control performance, are based on extensive theoretical investigations.

	Combined-levitation-and-propulsion control of SLIM Maglev vehicle on flexible guideway By K. Yoshida; T. Yoshida; K. Noda	[View] [Download]
Abstract: Based on the decoupled control method of attractive-normal and thrust forces in a single-sided linear induction motor (SLIM), a compact combined-levitation-and-propulsion SLIM Maglev vehicle can be realized without any additional levitation magnet. In a Maglev system, if the distance between two pillars of the guideway is long compared with the vehicle length, a vibration of the guideway is one of the most important problems to be solved. This paper presents a combined-levitation-and-propulsion control to suppress the guideway vibration in Maglev vehicle realized by SLIM only. For very difficult levitation control combined with propulsion, much more accurate airgap length has been estimated from measured one by sensor and short-primary end effects on attractive levitation force has been taken into account. Experimental results has shown that the vehicle can be stably propelled and levitated simultaneously on the flexible guideway.

	Sensorless control of a 2.4 MW linear synchronous motor for loanching roller-coasters By A. Veltman; P. van der Hulst; M.C.P. Jonker; J.P. van Gurp	[View] [Download]
Abstract: An accurate method for estimating the position of a large Linear Synchronous Motor, based on on-line measured phase currents and voltages is shown. Synchronous frame ﬁlters remove the fundamental component from these signals eﬀectively, even during fast acceleration. The proposed correlators estimate local parameter values, inductance and resistance, from the remaining switching ripple signals with high bandwidth, able to follow the abrupt changes caused by block switching of the long stator. Experimental results show that a controlled start from standstill is possible.

	A novel direct drive system for textile winding applications By N. Jakeman; W. Bullough; C. Bingham; P. Mellor	[View] [Download]
Abstract: The paper describes the specification, modelling, magnetic design, thermal characteristics and control of a novel, high acceleration (up to 82g) brushless PM linear actuator with Halbach array, for textile package winding applications. Experimental results demonstrate the realisation of the actuator and induced performance advantages afforded to the phase lead, closed-loop position control scheme.

	The excitation patterns and torque characteristic of moving-magnet-type surface motor By J. Tsuchiya; G. Kimura	[View] [Download]
Abstract: Several types of surface motors (SFMs) which have the ability to perform surface motion have been proposed. However, most SFMs are limited in movement, because the movers used depend on electrical wires to supply the operating current. The authors have proposed a new type of SFM that does not require wires to be connected to the mover. The most advantageous feature of this new type of SFM is that the mover can perform rotation in addition to linear motion on a plane surface. This SFM could be used for applications in a sealed space, because the mover and the stator are completely separate. In this paper, the structure of this SFM and the movement principle are described. The torque characteristics of each excitation pattern are experimentally measured, and, as a result, the optimum excitation pattern for rotational motion is obtained.