Linear Synchronous Reluctance Motor—A Comprehensive Review
01 Jan 2018-pp 45-70
TL;DR: The scientific status, development, and future scope of the LSRELMs are reviewed, including analysis techniques, design prospects, control aspects, optimization techniques, and parameter identifications.
Abstract: Linear synchronous reluctance motors (LSRELMs) are becoming an attractive alternative for linear induction motors (LIMs), linear synchronous motors (LSMs), and linear switched reluctance motors (LSRMs). This paper reviews the scientific status, development, and future scope of the LSRELMs. These include analysis techniques, design prospects, control aspects, optimization techniques, and parameter identifications.
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TL;DR: An electro-hydrostatic actuator (EHA) based on the linear drive principle is proposed, which is directly driven by a linear pump with a collaborative rectification mechanism, whose performance relies on the collaboration of the internal two units.
Abstract: In order to provide a simplified and low-cost solution of the terminal for a distributed actuation system, this paper proposes an electro-hydrostatic actuator (EHA) based on the linear drive principle. The proposed actuator is directly driven by a linear pump with a collaborative rectification mechanism, whose performance relies on the collaboration of the internal two units. A pair of linear oscillating motors are employed to drive the two pump units respectively. The control of the actuator is based on the modulation of the oscillating amplitude, frequency, and phase difference of the two motors. The advantage of this actuator is that no more valve control is needed to rectify the linear pump besides the high efficiency of the direct pump drive. In this paper, both schematic and detailed structure of the actuator is presented. The kinematic and dynamic characteristics are analyzed and modeled, based on which the control method is proposed. The experiments verify the validity of the actuator structure and control.
12 citations
Cites background from "Linear Synchronous Reluctance Motor..."
...The pump drives a soft actuator to actuate fluidic muscle [12]....
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TL;DR: In this paper , an adaptive non-singular terminal sliding mode controller (ANTSMC) based on an improved disturbance observer (IDOB) is proposed to further improve the dynamic performance and steady-state accuracy of the EMLA.
Abstract: In this study, to further improve the dynamic performance and steady-state accuracy of the electromagnetic linear actuator (EMLA) for the direct-drive system, the adaptive non-singular terminal sliding mode controller (ANTSMC) based on an improved disturbance observer (IDOB) is proposed. Accurate modeling of the EMLA based on the LuGre friction model was obtained by identification. Aiming at the continuous disturbance of the system, a non-singular terminal sliding mode control based on improved exponential reaching law (IERL) is designed, which is combined with the advantages of fuzzy control. Adaptive adjustment of the IERL gain is achieved to ensure finite time convergence of the tracking error while suppressing system jitter. Based on the IDOB to achieve effective observation compensation under noise disturbance and further improve the system robustness. The stability of the control is analyzed based on the Lyapunov function. The results show that the proposed method suppresses the jitter and improves the tracking performance and robustness of the servo system for different desired trajectories effectively.
4 citations
TL;DR: In this paper , the authors investigated different speed controller structures to improve the dynamic operation of SynRM and proposed three controller strategies, i.e., self-tuning PI-based anti-windup action (AW), fuzzy logic (FL), and classical PI controllers.
Abstract: This research presents an investigation of different speed controller structures; the main objective is to improve the dynamic operation of vector-controlled synchronous reluctance motor (SynRM). Three controller strategies are designed and their operation is discussed in detail. The self-tuning PI-based anti-windup action (AW), the fuzzy logic (FL), and the classical PI controllers are proposed. The obtained results show the good performance and limitations of these three controllers. In fact, the self-tuning anti-windup controller is superior in terms of rapidity; its response time is very quick. The fuzzy logic controller is characterized by a high resistance against load torque perturbation and external uncertainties. While the classical PI controller presents less performance compared to the proposed controllers. Besides, the PI strategy is very sensitive to load torque, and its response time is the slowest. All simulations have been realized in MATLAB/Simulink environment.
1 citations
16 Dec 2022
TL;DR: In this article , the mathematical modeling of linear induction motors (LIMs) using MATLAB/SIMULINK has been performed and the closed-loop operation of LIM using field-oriented control (FOC) is simulated and performance curves are plotted.
Abstract: Linear motors are becoming more attractive than conventional rotating motors for applications like industrial automation, large-scale bulk materials transport, train propulsion, and machine tools. Major Linear motors used for such applications are Linear Induction Motors (LIM), Linear Synchronous motors (LSM), Linear Synchronous Reluctance Motors(LSRM), and Linear Brushless Motors(LBLM). LIMs are preferred for high acceleration applications like spacecraft propulsion application, magnetic levitation, and monorail. Linear induction motors (LIMs) have been used in urban railway transportation because of their simple stator structure and high velocity. However, the disadvantage of LIM is the end effect and the losses like eddy current losses and copper losses. The project is focused on the mathematical modelling of LIM using MATLAB/SIMULINK. The closed-loop operation of LIM using field-oriented control(FOC) is simulated and performance curves are plotted.
DOI•
19 Jan 2023
TL;DR: In this paper , the authors presented a solution to obtain adequate ECG signals using low-cost devices and showed that an affordable ECG can be recorded at home using a 1-lead ECG machine.
Abstract: This article presents a solution to obtain adequate ECG signals using low-cost devices. We believe that a pilot ECG examination in the home environment can detect certain forms of arrhythmias. If arrhythmias are diagnosed and treated in time, a person can completely avoid serious health problems. Performing an ECG examination at home is hindered by the high cost of professional equipment. That’s why some low-cost devices capable of recording an ECG signal have drawn our attention. The results of our research showed that an affordable ECG can be recorded at home using a 1-lead ECG machine.
References
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01 Mar 1997TL;DR: Linear electric actuators and generators (LEAGs) as mentioned in this paper are electromagnetic devices which develop directly short-travel progressive (or oscillatory) linear motion, and have been used in many applications in compressors, pumps, electromagnetic valve actuators, active shock absorbers, vibrators etc.
Abstract: Linear electric actuators and generators (LEAGs) are electromagnetic devices which develop directly short-travel progressive (or oscillatory) linear motion. Machine tool sliding tables, pen recorders and free piston power machines are typical industrial applications for LEAGs. Their recent revival in applications in compressors, pumps, electromagnetic valve actuators, active shock absorbers, vibrators, etc. Prompts this review, which presents main LEAGs configurations, their principles of operations, comparative performance evaluation, motion control and existing as well as potential applications.
591 citations
29 Sep 1999
TL;DR: In this paper, the authors presented a model of a PM motor with permanent magnet motors and demonstrated the acceleration and speed control of a hybrid stepping motor with the help of a linear positioning sensor.
Abstract: Topology and Selection Definitions, Geometry, and Thrust Generation Linear Synchronous Motor Topologies Calculation of Forces Linear Motion Selection of Linear Motors Materials and Construction Materials Laminated Ferromagnetic Cores Permanent Magnets Conductors Principles of Superconductivity Laminated Stacks Armature Windings of Slotted Cores Slotless Armature Systems Electromagnetic Excitation Systems Superconducting Excitation Systems Hybrid Linear Stepping Motors Theory of Linear Synchronous Motors Permanent Magnet Synchronous Motors Motors with Superconducting Excitation Coils Variable Reluctance Motors Permanent Magnet Hybrid Motors Motion Control Control of AC Motors EMF and Thrust of PM Synchronous and Brushless Motors Dynamic Model of a PM Motor Thrust and Speed Control of PM Motors Control of Hybrid Stepping Motors Precision Linear Positioning Sensors Linear Optical Sensors Linear magnetic Encoders High Speed Maglev Transport Electromagnetic and Electrodynamic Levitation Transrapid System (Germany) Yamanashi Maglev Test Line in Japan Swissmetro Marine Express Building and Factory Transportation Systems Elevator Hoisting Machines Ropeless Elevators Assessment of Hoist Performance Horizontal Transportation systems Industrial Automation Systems Automation of Manufacturing Processes Casting Processes Machining Processes Welding and Thermal Cutting Surface Treatment and Finishing Material Handling Testing Industrial Laser Applications Appendix A Magnetic Circuits with Permanent Magnets Appendix B Permeances for Magnetic Fluxes Appendix C Performance Calculations for PM LSMs Symbols and Abbreviations References
249 citations
08 Oct 2000
TL;DR: This paper deals with experimental methods for the identification of linear synchronous reluctance motor parameters and the proposed model, experimental methods, and determined characteristics are confirmed through a comparison between the measured and calculated results.
Abstract: This paper deals with experimental methods for the identification of linear synchronous reluctance motor (LSRM) parameters. A magnetically nonlinear two-axis dynamic LSRM model is derived. This model accounts for the effects of slotting, saturation, cross-saturation, and the end effects. The parameters of the obtained model are not constant. They are given by the characteristics of the flux linkages, thrust, and friction force depending on the mover position and the direct (d) and quadrature (q) axis currents. These characteristics are determined experimentally by a controlled voltage-source inverter employing closed-loop current control in the d-q reference frame. The proposed model, experimental methods, and determined characteristics are confirmed through a comparison between the measured and calculated results. Two tests are performed: a test at the locked mover, and kinematic control at low speed. The effects of cross saturation under dynamic operating conditions and the effects of slotting can be clearly seen in the measured and calculated results.
64 citations
10 Jun 2008
TL;DR: The main object of this paper is designing of reluctance synchronous linear motor with the maximum power factor and output thrust force and long primary (armature) and short secondary is evaluated.
Abstract: This paper describes the design optimization and analysis of reluctance-synchronous linear motor with a solid or laminated moving part (secondary). The calculation of the motor performance is described using analytical formulation and numerical method. The main advantage of this system is the removal of permanent-magnet secondary and replacing it with a reluctance-type secondary. The first purpose of this paper is designing a reluctance-synchronous linear motor with the maximum-output thrust force and optimum power factor. In this model, a long primary (armature) and a short secondary are evaluated. Distributed winding is considered for design and analysis. Finally, air-gap winding configuration is evaluated.
22 citations
TL;DR: In this article, the Finite Element Method (FEM) based procedure for determination of operating point dependent inductances of a Linear Synchronous Reluctance Motor (LSRM) under load conditions is presented.
Abstract: The paper deals with the Finite Element Method (FEM) based procedure for determination of operating point dependent inductances of a Linear Synchronous Reluctance Motor (LSRM). Special attention is paid to the effects of cross magnetization and saturation on the inductances of LSRM under load conditions. To achieve a deeper insight into the cross magnetization and the saturation phenomena a standard two-axis LSRM dynamic model is modified. The modified dynamic LSRM model contains explicit terms for the direct and the quadrature axis self-inductances and explicit terms for the cross coupling inductances. The last ones appear as a consequence of the cross coupling between the direct and the quadrature axis. All inductances of the modified LSRM model are current dependent.
21 citations