Permanent-magnet linear actuator for static and reciprocating short-stroke electromechanical systems

Evans, Steven A.; Smith, I R; Kettleborough, J.G.

doi:10.1109/3516.914389

Cited by 18 publications

(8 citation statements)

References 6 publications

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“…Generally, linear machines are characterized by special features such as direct linear motion (no mechanical elements), low maintenance cost, no centrifugal force, robustness, high speed operation, and accurate positioning [2], [3]. It has been confirmed that amongst the various linear machine topologies, PM linear machines are the most favored since they provide the highest force density and efficiency compared to other machines, i.e.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Novel Tubular Partitioned Stator Permanent Magnet Machines

Zhu

Shuraiji

2016

IEEE Trans. Magn.

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Permanent magnet (PM) tubular machines have been applied to many applications since they offer high force density with no endwinding and no net attractive between the mover and the stator. In this paper, two novel PM tubular machines named as partitioned stator interior permanent magnet (PS-IPM) and partitioned stator surface mounted permanent magnet (PS-SPM) tubular machines are proposed. Both proposed machines are optimized for maximum thrust force, and their electromagnetic performances have been compared. It is found that the PS-IPM tubular machine has higher thrust force capability and better magnet utilization compared to the PS-SPM tubular machine. However, due to lower cogging force, the PS-SPM tubular machine has less thrust force ripples. Furthermore, the effect of the cross-coupling magnetic saturation on PM flux linkage, and d-and q-axis inductances for both proposed machines is investigated. It is demonstrated that the PM flux linkage, and d-and q-axis inductances are affected by cross-coupling magnetic saturation. Moreover, the force-velocity characteristics of proposed machines are calculated and compared. It is observed that both machines have good constant power operation capability.Index Terms-Partitioned stator, linear machine, permanent magnet, tubular machine, thrust force. 0018-9464 (c)

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Section: Introductionmentioning

confidence: 99%

Comparative Study of Novel Tubular Partitioned Stator Permanent Magnet Machines

Zhu

Shuraiji

2016

IEEE Trans. Magn.

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“…Such modelling process can be found in the litterature [10]. However, in this paper, the dynamic equations models both the actuator and the actuated component.…”

Section: Introductionmentioning

confidence: 99%

“…A first optimization loop for a given geometry will be used to define the optimal control law and the springs parameters. Size optimization will be done as a second step using a stochastic method of particular swarm optimization [12]; method is expected to give quicker results than the full factorial design of experiments presented in [10].…”

Section: Introductionmentioning

confidence: 99%

Modeling and Optimization of a Linear Actuator for a Two-Stage Valve Tappet in an Automotive Engine

Duchaud

Hlioui

Louf

et al. 2015

IEEE Trans. Veh. Technol.

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This study focuses on external volume and power consumption optimization of an electromagnetic actuator used to move pins in a two-stage variable valve lift component within an automotive engine. This system is designed to change the valve lift at each engine cycle. To achieve this optimization, three models were developed: a magnetic, an electric and a dynamic one. They evaluate the performances of a given actuator, check if it fulfills its role and define the springs needed for the displacement of the pins. The optimization is made using a particle swarm method and can reduce the volume up to 20% with the same electric consumption.

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“…However, if nonlinearity is too significant to be neglected, the nonlinear state-variable modeling has to be used. By way of example, both [3] and [4] store the nonlinear finite element (FE) predicted actuator performance in terms of cogging force, force coefficient, inductance, etc as look-up tables, whilst the gas force characteristic of linear compressors can be modeled by an ideal pneumatic model, [5], [6]. Additionally, transient FE analyses can be incorporated into the simulation process, as done in [7] and [8].…”

Section: Introductionmentioning

confidence: 99%

“…However, the fundamental approach for the modeling of different load forces is identical, i.e. to convert the load forces into equivalent stiffness and damping components and substitute it with them in (3).…”

Section: Introductionmentioning

confidence: 99%

Modeling and Evaluation of Linear Oscillating Actuators

Chen¹,

Zhu²

2012

Journal of international Conference on Electrical Machines and

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The operation of linear oscillating system is complicated, involving system nonlinearities of both actuator and load, and variations of driving frequency in order to track the mechanical resonance. In this paper, both analytical and state-variable modeling techniques are used to investigate the influence of actuator parameters, such as back-emf/thrust force coefficient and cogging force, on the performance of linear oscillating systems. Analytical derivations are validated by simulations, and good agreements are achieved. The findings of the paper can greatly facilitate the design and evaluation processes of permanent magnet linear actuators.

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Permanent-magnet linear actuator for static and reciprocating short-stroke electromechanical systems

Cited by 18 publications

References 6 publications

Comparative Study of Novel Tubular Partitioned Stator Permanent Magnet Machines

Comparative Study of Novel Tubular Partitioned Stator Permanent Magnet Machines

Modeling and Optimization of a Linear Actuator for a Two-Stage Valve Tappet in an Automotive Engine

Modeling and Evaluation of Linear Oscillating Actuators

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