Analysis and Modeling of Linear-Switched Reluctance for Medical Application

The tubular linear SR machines were successfully tested in medical applications as artificial heart pump actuators [12].However, analysis and design of SR machines is a complex task compounded by their non-linear behavior. Despite some effort [13] the analysis and design calculations have not yet been developed into intuitive analytical tools comparable to the methods available for the more established types of machines, such as induction or permanent magnet. The main difficulty with the analysis and design of SR machines is the magnetic nonlinearity caused by the heavily saturated iron parts of the machine circuit. The non-saturating SR machines, as used in some niche applications, are not considered here.Given the wide variety of topological arrangements of SR machines, which is expected to grow in the future as the demand for the new applications increases [14], it is vital to establish computationally efficient analysis and design methods. The aim is to make the design task more systematic which in turn will open new application areas for the versatile SR electric machine technology.Reduced order computational methods, the most notable example being the magnetic equivalent circuit (MEC) approach, have been successfully employed in the past to various types of electric machines [15]. The main advantage of the MEC based models is that they are relatively accurate given their computational efficiency. The finite element analysis (FEA) is very useful for accurate analysis of the established electric machine technologies, but it does not offer the cause-and-effect insight when novel and unfamiliar machine topologies are being considered [16]. Therefore, bearing in mind the advantages of the MEC based analysis methods, the design cycle is proposed as illustrated in Fig. 1.The starting point (red rim) in Fig. 1 is where a novel topology SR machine is identified and considered for a certain application because it meets some particular requirements imposed by the application, for example: cost, volume and mass, mechanical, etc. Next, the improved flux tube based method [17], [18], which we propose in this paper, is employed to construct the electromagnetic model of the machine and is subsequently used in conjunction with a design search and optimization algorithm, e.g. the genetic algorithm (GA) [19]. Once a set of near optimal solutions

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confidence: 99%

An Efficient Design Optimization Framework for Nonlinear Switched Reluctance Machines

Stuikys

Sykulski

2017

IEEE Trans. on Ind. Applicat.

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“…When the stator houses the winding, it forms the primary and the configuration so obtained is referred to as active stator configuration (primary). This configuration has been adopted in developing actuators, drives for doors, industrial rails ( [11], [53], [57], [12], [18], [41], [32], [2], [17], [9], [43]). Similarly, when the translator houses the windings, the configuration is called an active translator or primary mover.…”

Section: Selection Of Configurationsmentioning

confidence: 99%

“…Development of control algorithms obtained a smoother operation by reducing cogging or ripple force, often experienced in a variable reluctance machine. This accelerated their application in several fields ranging from elevator drives [34], [35], generators [57], transportation rails ( [37], [5], [29]) ocean wave energy harnesser [56], actuators [12], driver for automatic door [18], medical applications [41] only to name a few. The present work discusses the various flexibility in configuration, algorithms of design, tools of analysis and adopted control methodologies of LSRM, in brief.…”

Section: Introductionmentioning

confidence: 99%

A review on linear switched reluctance motor

Chowdhury

Kumar

Kalita

et al. 2017

RakMek

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Summary. Switched reluctance motors have been extensively studied by researchers for their unparalleled advantages in many applications. The linear versions have been developed around the world in the last couple of decades because of attributes similar to that of rotary switched reluctance motor(RSRM). Owing to their frugal design, robust built and high force density, the linear switched reluctance motor (LSRM) has had significant stages of development and optimization. The flexibility in design and operation makes LSRM a prime contender for any linear motor-actuator application. This paper provides a bird's eye view across its developmental stages and its various aspects in design, analysis and control. The following content discusses the salient points of research and the contribution by researchers in this field.

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“…Velocity control is used to compare the actuator motion speed with the reference speed. The velocity of the linear switched reluctance actuator can be obtained by applying a simple position derivative [8], [88]- [89]. A current reference will produced from the speed control then compared with the actual phase current [90].…”

Section: Velocity Controlmentioning

confidence: 99%

“…The schematic structure of the tubular LSRA is shown in Figure 3. LSRA is an attractive alternative candidates on many applications such as propulsion railway transportation system [6], active vehicle's suspension system [7], left ventricular assist device [8], precision motion control [9]- [10] and direct-drive wave energy [11]. LSRA does not attract the interest among the researchers due to nonlinearity characteristic, large thrust force ripples, high acoustic noise, vibration and low thrust force-volume density [12]- [16].…”

Section: Introductionmentioning

confidence: 99%

A Review: Design Variables Optimization and Control Strategies of a Linear Switched Reluctance Actuator for High Precision Applications

Kiat¹,

Ghazaly²,

Chong³

et al. 2017

IJPEDS

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This paper presents the review of design variables optimization and control strategies of a Linear Switched Reluctance Actuator (LSRA). The introduction of various type of linear electromagnetic actuators (LEA) are compared and the advantages of LSRA over other LEA are discussed together with the type of actuator configurations and topologies. The SRA provides an overall efficiency similar to induction actuator of the similar rating, subsequently the friction and windage losses are comparable but force density is better. LSRA has the advantage of low cost, simple construction and high reliability compare to the actuator with permanent magnet. However, LSRA also has some obvious defects which will influence the performance of the actuator such as ripples and acoustic noise which are caused by the highly nonlinear characteristics of the actuator. By researching the design variables of the actuator, the influences of those design variables are introduced and the detail comparisons are analyzed in this paper. In addition, this paper also reviews on the control strategies in order to overcome the weaknesses of LSRA. Keyword:Actuator INTRODUCTIONLinear electromagnetic actuators (LEA) is a mechanism that generate linear motion due to the interactions of the magnetic fields and electromagnetic thrust. The major advantage of electromagnetic actuators over the conventional actuators is that it is almost maintenance free which is due to the absence of mechanical part such as gears The typical design of LEA can be characterized as three topologies: (i) Planar Single Sided; (ii) Planar Double Sided; (iii) Tubular. By comparison, the tubular topology of LEA has greater force density compare to planer topology actuator due to lesser flux leakage and tubular topology actuator minimized the stray magnetic field in the direction of travel along the stator and mover part [5]. Hence, the thrust force and

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Analysis and Modeling of Linear-Switched Reluctance for Medical Application

Cited by 16 publications

References 11 publications

An Efficient Design Optimization Framework for Nonlinear Switched Reluctance Machines

An Efficient Design Optimization Framework for Nonlinear Switched Reluctance Machines

A review on linear switched reluctance motor

A Review: Design Variables Optimization and Control Strategies of a Linear Switched Reluctance Actuator for High Precision Applications

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