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Switched reluctance motors (SRMs) are used in the industry due to their simple motor design construction, the susceptibility of running at wide speed range, high torque to inertia ratio, low cost, and high reliability. In this paper, the SRM drive system is fed from asymmetric four-phase power converter (APC) using soft switching technique. This pa...
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... FLC speed controllers. The comparative analysis is based on the values of the rise time, settling time, overshoot, undershoot, speed error in the steady state, and torque ripples percentage of the three controllers. The robustness of the proposed PSC is validated in such cases e.g. mechanical parameter variations, and external load disturbances. Fig. 1 shows the geometry structure of a four-phase, 8 stator poles and 6 rotor poles of the SRM used in this study. Although the SRM operation seems simple, a precision investigation of the motor's performance seeks a proper and somewhat sophisticated mathematical modeling approach. The SRM instantaneous voltage through a single-phase ...
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span>Owing to the resilience and ease of control, switched reluctance motors are commonly utilized in electric vehicle drives. This paper provides a topology for a multi-functional power converter for switched reluctance motor based electric vehicle drive with driving, braking and charging potentialities. With efficient control algorithms, a single...
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... However, most of the previous techniques can become very complex and difficult to implement, therefore, in the industry it is preferred to use classic controllers such as PI, due to its easy implementation, effectiveness and price. For this reason, much of the current research on the control of this type of motors seeks to improve this controller or design new control techniques taking the PI controller as a reference framework [12], [13] and [14]. ...
This work presents two control strategies, with the objective of reducing the undesirable effects of ripple and dead zone in the speed response of a switched reluctance motor (SRM) 8/6. The first strategy aims to reduce the dead zone by applying a double integrator classical controller, while the second strategy proposes a new strategy to reduce the speed ripple, which works in conjunction with a classic PI controller. The strategy, based on digital simulations shows a reduction on the dead zone effect and speed ripple, the simulations were performed using the Matlab® / Simulink software and are based on a simplified non-linear model that has the non-linearity of Coulomb friction plus viscous friction, as well as an ideal inverter circuit.
... In addition, easily modeling, lower user-skill requirement and development complexity bring it to more suitable for engineering practice than those advanced control methods. As mentioned above, the traditional PI regulators are used to achieve the speed control of S-RM drives [28]. Unfortunately, the traditional PI control cannot satisfy the actual requirements as the nonlinear factors, external disturbances and the variation of internal parameters intensifies, which leads to its application is greatly restricted. ...
This paper develops a novel switching variable proportional desaturation proportional integral (SVPDPI) regulator for speed control of switched reluctance motor (SRM) drive system. Firstly, the idea of desaturation is adopted in the SRM drive system in order to eliminate the integral saturation phenomenon of traditional proportional integral (PI) regulator. Secondly, the variable proportional desaturation PI (VPDPI) regulator is proposed to enhance the response speed of SRM drive system by introducing the concept of variable proportion. In addition, in order to improve the smoothness of the SRM start-up speed, a switching speed regulator is further designed based on the VPDPI regulator. Finally, the principle of error threshold segmentation is introduced into SVPDPI regulator, whose control performance is compared with among other three regulators under rated speed, various speeds and load-torque conditions. Meanwhile, the dynamic performance, steady performance and start-up performance are comprehensively analyzed. The simulation experiment results commendably indicate that the proposed SVPDPI regulator is superior in tracking performance, anti-disturbance performance and speed range.
... Complete design, modelling, and analysis have been done using the ANSYS software including the SRM for thermal analysis, and airgap flow [26], also for limiting the fault [28]. Different control schemes are adopted experimentally for switched reluctance machines under various types of converters topologies [27], to enhance the performance with high accuracy speed control [29], [30]. These power units endure harsh environments with close proximity to engines that require continuous high output for several hours. ...
This paper proposes technical guidelines, modelling, and control of an ultra-high-speed-switched reluctance motor- generator for automotive turbo-charged assistance and energy recovery. Creation of an ideal model using electromagnetic finite element analysis and conducting a low cost/ low scale experiment is proposed. The first objective focuses on the transient simulation process. The second objective focuses on an investigation of the proposed control criteria. The modelling and analysis of a “Switched Reluctance Motor” (SRM) is an initial task for the selection of the coupled mover. Two controllers are selected for the experiment which consists of a generally low-cost solution and an optimized development board for prototyping optimization. The low-cost control solution is implemented with an Arduino Uno and an assortment of relays configured into an asymmetrical half bridge. The second controller is the “Digilent Zed Board Zynq-7000 ARM/FPGA SoC Development Board” (Zed board). ANSYS 2D, 3D modelling, data simulation for the stator and rotor are implemented. Current, voltage, and flux for all phases waveforms are included. Rotor dynamic simulation, machine transient simulations, and some other characteristics are depicted through 3D figures.
... The asymmetric H-bridge is usually regarded as the special driving topology for switched reluctance motor (SRM) [1]. From Fig. 1 it can be found that in this H-bridge structure, the external diode for every IGBT leg is required [2], which makes the cost of the driving system [3] higher than the conventional full bridge, as is shown in Fig. 2. The conventional full bridge is known as a driving system for the brushless direct current motor (BLDC) [4], with the internal freewheel diodes, it is commonly known that the full bridge structure cannot be used to drive SRM. ...
It is known that in order to drive a switched reluctance motor (SRM), the power converter is required, which makes it different from other common type of motors such as brushless direct current motor (BLDC). As a result, the cost of the control system for SRM is higher than the conventional inverter structure of control system for BLDC. A new control strategy for SRM is proposed in this paper, with an extra DC power supply, SRM can be driven by a general inverter without changing the structure of the motor itself, the cost for driving SRM can be reduced drastically. The new control method is also tested with simulation and validation, which prove that the new method can work in the practical application.
Switched Reluctance Motor (SRM) is an electrical motor which operates by a reluctance torque that has stator and rotor salient poles. It also has a simple configuration and reasonable power electronics necessity for both AC and DC machines within adjustable-speed drives. The problem working on it is, SRM with doubly salient poles introduce a torque ripple in its output which leads to deteriorated performance on speed control. In this proposed work, torque ripple reduction and speed control of SRM is implemented, utilizing an asymmetrical converter with PI-PWM controller with the aid of Bio-inspired algorithms. By utilizing the best value of flux, torque ripple and integral square error of speed and settling times, controller design is performed. The proposed research work compares three optimization algorithms namely Crow Search Algorithm, an Improved Ant Lion Optimization Algorithm and Modified Chaotic Starling Particle Swarm technique to control the speed and torque reduction of SRM in aerospace applications. To obtain the optimal parameter values, optimization techniques are introduced and the optimized controller results are compared with other conventional controller results. In normal operation, the engine operates with two phases simultaneously, but it is modelled to meet the load specification, which is single and double phase faulty. Detection of fault gives a great outcome in control of an electrical drive system. Reduction of faulty operation time leads to better motor lifetime that is obtained by early detection of a fault. This paper presents how the five-phase switched reluctance motor is designed to meet the needs of flap actuators in mid-sized aircraft. Electrical systems are modelled to provide the right functionality at the right time in advanced aircraft. However, requirement of power for the landing gear and secondary flight control only a short duration. The system is powered on and off as required, thus preserving power. Control performance and fault analysis were verified by the results of the MATLAB simulation. Experiments have been carried out more effectively to compare the results obtained with those of simulations.
