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Due to high precision, high speed, and high fault tolerance capability, the linear switched reluctance motor (LSRM) is applied in digital control technologies as well as electronic switching devices. The LSRM is considered as a good substitute for conventional linear drive systems for long-way transportation. In this paper, a single-stator and double-stator longitudinal flux-type LSRM for high-speed transit system is proposed. Since the flux in the longitudinal arrangement is in the same alignment as the motion of the translator, the proposed system is easier to construct, mechanically stable with minimum eddy current loss. It also produces the magnetic flux along the direction of motion, which makes it highly suitable for high-speed linear transit application. The proposed conceptual LSRM differs from the conventional LSRM, in such a way that the active stator holds the excitation windings, while at the same time it acts as a translational body that moves over the stationary translator bed. The motor characterization is performed in ANSYS electromagnetic simulation tool, to determine the applied forces, coupling inductance, and strength of the magnetic field of the proposed LSRM for the traction propulsion system. The finite element analysis (FEA) is utilized here to analyze the modeled configuration, for verification of the design and performance prediction of the proposed LSRM. [ABSTRACT FROM AUTHOR]

Linear Motors are potential candidates for replacing traditional rotary motors in high-speed transit systems. Linear Switched Reluctance Motor (LSRM) is the widely researched motor for such applications. This paper presents a design for linear switched reluctance motor (LSRM) with an improved propulsion force profile. The proposed motor consists of moving translator for direct drive transmission, without the use of mechanical gears. The stator contains a split-teethed stator structure. The proposed motor has more translator teeth than stator teeth. This paper includes a new design methodology for the proposed combination of stator and translator. The motor is designed and analyzed using 3-D finite-element method (FEM). The proposed motor has been optimized using a parameter-based cumulative deterministic optimization algorithm (PBCDOA) for further improving the force profile. The FEM results demonstrate the effectiveness of the design procedure and better force performance of the proposed topology. [ABSTRACT FROM AUTHOR]

Linear switched reluctance motor (LSRM) has proven its suitability in transit applications due to the advantages of direct drive, low cost and simple mechanical structure. In evolution of LSRM, its force performance is the prime concern for the manufacturers. This factor is mainly governed by its physical design. Force characteristics are quite important for obtaining precise design of the LSRM. Because of its nonlinear characteristics, quantitative measurement method for measuring various parameters of the LSRM has not been generalized. This paper discusses finite element analysis-based design considerations for measuring various performance parameters of the LSRM. The paper incorporates the design studies of the LSRM as per analytical expressions and validated using finite element method (FEM)-based ANSYS/Maxwell software. Finite element analysis includes measurement of force, flux and inductance characteristics of the LSRM. Further, it optimizes the motor parameters for maximizing the thrust force of the motor. The proposed study is crucial in estimating various performance parameters of the LSRM using FEM and propagating the traceability chain in parameter estimation of LSRM using three-dimensional FEM-based model of the motor. [ABSTRACT FROM AUTHOR]

A new structure of a linear switched reluctance motor is proposed in this paper. With the permanent magnet inserted in the movers, the performance of the original motor is improved. An electromagnetic analysis is done by using the finite element analysis. The influence of the permanent magnets in different positions of the movers on the electromagnetic force is investigated. Furthermore, a theoretical analysis is made, based on the Schwarz–Christoffel transformation and the Maxwell stress tensor method. The mathematic model is also made with the consideration of the end effect and the cogging effect. The theoretical result of the electromagnetic force is compared with the simulation result. The comparison shows that the error is limited. The analysis of the flux, the magnetic field, and the inductance is then made. The results confirm that the new structure makes the motor more linearized. The new structure of linear switched reluctance motor can contribute to reducing the ripple in the electromagnetic force. [ABSTRACT FROM AUTHOR]

The present paper deals with design, modeling and characteristics of a biomedical system. The involved biomedical system is a syringe pump generally used for continuous drug infusion. The syringe pump consists of a linear switched reluctance motor (LSRM) coupled to a syringe plunger. In order to determine the axial force to control the syringe plunger, it was necessary to begin by evaluating the thrust force. For that purpose, an analytical approach is developed to evaluate the different forces and pressures involved. In addition, an experimental bench was conceived to determine the thrust force and validate the analytical model of the syringe. Consequent results constituted the key element for designing and modeling the LSRM with the help of finite element methods (FEM). The final step is reserved to predict the dynamic performances of all the biomedical system with and without saturation. Copyright © 2016 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]

In the present paper, an electromagnetic simulation model is introduced for the conventional type of linear switched reluctance motor (LSRM) in which the dynamic characteristics of the motor are predicted precisely by carrying out 2D finite element (FE) transient analysis using ANSYS FE package. The simulation model is created totally in ANSYS parametric design language (APDL) as a parametric model and it can be used easily for different designs of the conventional LSRMs. Introducing linear switched reluctance motor with segmental translator as a new type of LSRM, performance principles and design criteria are presented for two various topologies of this motor. Carrying out 2D FE transient analysis, dynamic characteristics of these two motors are predicted and compared to those obtained for the conventional LSRM. [ABSTRACT FROM AUTHOR]

The present paper deals with design, modelling and characteristics of a biomedical system. The involved biomedical system is a syringe pump generally used for continuous drug infusion. The syringe pump consists of a linear switched reluctance motor (LSRM) coupled to a syringe plunger. In order to determine the axial force to control the syringe plunger, it was necessary to begin by evaluating the thrust force. For that purpose, an analytical approach is developed to evaluate the different forces and pressures involved. In addition, an experimental bench was conceived to determine the thrust force and validate the analytical model of the syringe. Consequent results constituted the key element for designing and modelling the LSRM with the help of finite element methods (FEM). The final step is reserved to predict the dynamic performances of all the biomedical system with and without saturation. [ABSTRACT FROM AUTHOR]

This paper presents a comprehensive comparison between conventional (longitudinal ux) linear switched reluctance machines (CLSRMs) and transverse ux linear switched reluctance machines (TLSRMs) so as to enable engineers to choose a structure suitable for their applications. A commonly-used single-sided CLSRM and 4 different TLSRM structures are considered for the comparison. For a fair comparison of the 2 types of LSRMs, equal dimensions, including equal length and magnetomotive force, are applied as much as possible. The analytical approach and 3-dimensional finite element analysis (FEA) are employed to obtain the performance of these machines. It is proven analytically that the CLSRM has a higher force capability compared to TLSRMs by as much as 6 times under linear B-H characteristic operating points. The results are reinforced by the FEA-based performance results. Furthermore, the CLSRMs are simpler to construct, resulting in lower manufacturing cost and thus paving an easier path for their market acceptance than TLSRMs. These results make CLSRMs the structure of choice for linear-switched reluctance motors. [ABSTRACT FROM AUTHOR]

A novel stator geometry for a linear switched reluctance motor (LSRM) that improves the force profile is presented in this paper. In the new geometry, pole shoes are affixed on the stator poles. Static characteristics for the proposed structure have been highlighted using two dimensional (2-D) finite element analyses (FEA). A detailed sensitivity analysis of the effect of several geometrical parameters on the performance of the proposed LSRM is presented. Further, motor performance for variable load conditions is discussed. The 2-D FEA results and the experimental results of this paper prove that LSRMs are one of the strong candidates for linear propulsion drives. [ABSTRACT FROM AUTHOR]

In this paper, the results of a finite element analysis are carried out on a new stator geometry of a three phase longitudinal flux Linear Switched Reluctance Motor (LSRM). In the new geometry, pole shoes are affixed to the stator poles. Static and dynamic characteristics for the proposed structure have been highlighted. Motor performance for variable load conditions is discussed. The 2-Dimensional (2-D) finite element analysis (FEA) and the experimental results of this paper prove that LSRMs are one of the strong candidates for linear propulsion drives. [ABSTRACT FROM AUTHOR]

Day in, day out millions of people all around the world use public transportation systems. Within a metropolis, local rail transport is usually the only cheap and efficient way to get from one place to another. This is making new demands on the rail-bound mass transit. The door system needs to be robust, reliable, maintainable, safe and unaffected by the environment in order to guarantee an efficient train service. Because of round the clock operation of these trains, it is difficult to maintain the door systems regularly. They also get exposed to harsh environment like rain, sunlight and rough handling which may lead to malfunction. Safety is a very important constraint in any mass transit system and any malfunction in the door system can lead to severe mishap. Considering all the above constraints, we are proposing Linear Switched Reluctance Motor (LSRM) based door systems for railway carriages. The phase independent nature of LSRM makes it the best choice for door systems application as it can be made to operate even if any phase fails to work. This paper presents a clear design guide for a longitudinal flux single sided LSRM. The design parameters have been verified using two dimensional finite element analysis (2D-FEA). Finally a prototype has been built and tested. Test results imply the features of LSRM that make it a strong candidate for door systems of railway carriages. [ABSTRACT FROM AUTHOR]

We have developed a transverse flux linear switched reluctance motor (TFLSRM) in which 12 primary-side poles, each composed of four sectors, boost efficiency over the whole operating range. Each sector can operate independently, enhancing the robustness of the system by providing fault tolerance. We present a standard design method for the machine based on a power output equation related to the machine dimensions, air gap, force, efficiency, operating velocity, and required voltage. We illustrate the procedure by designing a sector for a three-phase, 250 W prototype TFLSRM. The method uses finite-element analysis to calculate the flux density, thrust force, and normal force versus position and current prior to construction of the prototype. Calculated and experimental results match within 5%, validating the design procedure. [ABSTRACT FROM AUTHOR]

Abstract: This paper presents the realization and design of a new linear switched reluctance motor (LSRM) structure. The new model has double sided configuration and provides high force for many applications with low cost. The characteristics of the LSRM are obtained by using finite element analysis (FEA) and analytical calculations. The results of the FEA and analytical calculations are presented, and compared with experimental results. A high correlation between experimental and analytical results is obtained, which has been demonstrated in the form of inductance versus position versus current. [Copyright &y& Elsevier]