Papers by Keyword: Switched Reluctance Motor

Abstract: Electric ship propulsion is no longer a revolutionary idea in the marine sector today. Lights were the first thing that needed electricity on board a ship, and it later applied to an electric ship propeller that is powered by an electric motor. Eventually, the idea of all-electric ships enters the picture, allowing all ship power sources to run both auxiliary and propulsion loads. Due to the great electric power constraints, numerous electric motors are used in industrial and naval ships, and the development of power electronics has made it easier to manage and regulate these motors. The switching resistance motor is becoming more popular despite its low dependability and straightforward design. Such benefits make SR motors superior to conventional adjustable speed devices. Due to their significant torque fluctuations, variable reluctance motors have recently been used in restriction traction systems. On the other side, torque ripple reduces motor performance by generating repeated noise and vibration. The suggested system controls the speed of an 8/6 pole SRM using a metaheuristic Grey Wolf Optimization Algorithm (GWO), Proportional Integral (PI) controller, and a (n+1) Semiconductor (n+1) Diode power conversion. This article's goal is to increase the proposed Switched Reluctance Motor's output cogging torque. GWO algorithm has been chosen as a promising strategy when compared to other algorithms because of its generality, decreased complexity, stability, and accuracy. MATLAB/Simulink was used to create the simulation tool.

Abstract: In this paper Switched reluctance motors are proposed for high temperature automotive applications due to the absence of magnets in comparison to conventional DC or brushless DC motors. The improvement in converter efficiency by the use of a current source converter in the front end simplifies the current control strategy that is otherwise required to be implemented in each phase coil winding. The analysis of the converter will be supported with simulation and the results for converter efficiency will be calculated. The proposed strategy will be suitable for implementation using a microcontroller based control mechanism for position control in an automotive application such as throttle control.

Abstract: To realize starting operation and reduce position estimation error of switched reluctance motor (SRM) without position sensor, a novel control method based on pulse injection, divided angle section and variable threshold is presented. The starting operation of SRM can be accomplished by injecting high frequency pulse and judging position sectors. Variable threshold is used to reduce position estimation error. The value of threshold is obtained by looking up table prestored in controller. The method avoids complicated mathematical model and is suitable for starting operation with two phases. Besides, rotor position estimation error of this method is analyzed and the method which can decreased the error is proposed. At last, the experiment has been done to verify the performance of the control method.

Abstract: A switched reluctance motor drive (SRD) is designed in this paper. This system has the characteristics of simple structure and reliable performance. It is designed based on 3 phase, 12/8 pole, 2.2 KW switched reluctance motor (SRM). The TMS320LF2407A is chosen as the core controller. The type of half bridge is adopted in the main power converter circuit, and IGBT is used as the main power switching component and discrete components is used as the main power switch converter device driver circuit. Experimental results show that the designed system can be run steadily under rated load conditions. Moreover, the speed regulation of this system has satisfactory performance.

Abstract: The torque ripple is the main disadvantage of switched reluctance motor (SRM). In order to reduce the torque ripple of SRM, and improve the performance of the system, the torque sharing strategy was combined with RBF neural network for the purpose of torque ripple suppression by controlling the winding current of each phase. In consideration of the possible error of network, the real-time current compensation was taken to compensate the loss of torque which could suppress the torque ripple of the system in further. The results show that he torque ripple of SRM was suppressed effectively.

Abstract: The paper develops a fuzzy logic controller (FLC) for the switched reluctance motor (SRM).The SRM is nonlinearity, time lag, inertia, uncertainty and so on .So the SRM is not use the general feedback theory or the conventional PID controller . So that , fuzzy logic controller (FLC) is a good way . The advantage of this method is that the proposed FLC has the characteristics of robustness. Fuzzy-PID control has better adaptability and stability, less overshoot, faster response and higher precision than PID-control and general feedback theory. Fuzzy-PID is adopted to control for switched reluctance motor to obtain a high performance.

Abstract: The aim of this survey is to design a low energy production wind generator for home or small industrial use, with short blades or different structure. Magnetic materials such as strontium hexaferrites and Nd-Fe-B composites are used in form of plastic bonded magnetic powder or laminas in the rotor and amorphous material or silicon steel in the stator. The envisaged machines are switched reluctance and permanent magnet, while preferable structure is this of vertical axis. Before the construction, both inside and outside rotor design machines, also toroidal stators can be tested, using finite element method and simulation programs such as ANSYS, COMSOL. Several parameters are examined, such as torque, magnetic field orientation and strength, magnet topology, output, etc, in order to achieve low cogging force along with high power. The results are to be compared with currently manufactured machines characteristics so as to decide for the efficiency of further investment.

Abstract: Switched reluctance motor (SRM) has a simple, inexpensive and reliable construction due to the concentrated coils on stator pole and no conductors or magnets on the rotor pole. The advantages on the SRM operation such as high speed, high torque to inertia ratio, fault tolerant, low inertia and low inrush currents, make it a better choice for use in different applications. The dynamic behavior of the SRM on various conditions should be studied. This paper aim is to develop a Matlab model of a 6/10 SRM using the mathematic equations. As the results, the simulation shows the impact of load torque on the phase current profile, speed profile, and inductance profile. The simulation is performed the characteristics of the switched reluctance motor in Matlab environment to show the efficiency of the proposed model.

Abstract: The power performance of the Switched Reluctance Motor (SRM) drive used in electric vehicles is very important for improving the dynamic performance of the vehicle and matching the parameters of the vehicle power train. In order to analyses the drive performance of the SRM drive under the electric vehicle, the nonlinear dynamic model of the SRM drive is established in the MATLAB/Simulink environment. Then the vehicle dynamic load model is designed to connect with the SRM drive model, and the performance analysis of the SRM used in the developing electric vehicle is carried out based on power output and equivalent power factor. The analysis results are significant for the design and improvement of the electric vehicle.

Abstract: The torque ripple is the important restriction affecting the promotion and application of switched reluctance motor, the analytic expressions to calculate switched reluctance motors tangential force and radial force are derived in this paper, based on analyzing the cause of switched reluctance motor vibration and torque ripple. By improving the stator poles structure, the torque near the commutation points is compensated, which smooth the wave of air gap magnetic field to reduce torque ripple when the stators and the rotors salient poles coincide. In this paper, three structures that puts wedge angle on both sides of the stator poles is presented, and analysis of torque ripple is made. Studies shows that the right size of wedge angle can effectively inhibit the switched reluctance motor torque fluctuations.