An efficient universal controller for switched-reluctance machines (original) (raw)
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An Investigation on Torque Control Strategies for Switched Reluctance Motor
2021 5th International Conference on Electrical, Electronics, Communication, Computer Technologies and Optimization Techniques (ICEECCOT), 2021
The torque ripple is owing to inherent non-linear characteristics of switched reluctance motor (SRM). It leads to the noise and vibration that limits the adoption of SRM in industrial and automotive applications. Numerous control strategies found in literature to cut down the torque ripple of SRM. This research focuses on an extensive survey on direct and indirect torque control algorithms. Direct torque control algorithms consists of direct instantaneous torque control (DITC) which is implemented with hysteresis and PWM based controller. While, indirect torque control is implemented by instantaneous torque control (ITC) and average torque control (ATC). It is observed from the survey that, in hysteresis based DITC, hysteresis band is designed to limit torque ripple which increases the switching losses due to high switching frequencies whereas, PWM based algorithms have constant switching frequencies but limited to low speed operating range. It also observed from study that, ITC is suitable for lower operating speed if back-EMF is less than dc link voltage and ATC is appropriate for complete operating speed range. Finally, critical comparison in terms of operating range, switching frequency, torque per ampere ratio and current control of these algorithms are presented. Outcome of this study helps the researcher in making the judicious choice for selection of appropriate algorithm for mitigation of torque ripple of SRM employed in various applications.
Dynamic Performance Analysis and Control Of A Switched Reluctance Motor
In this paper, a highly nonlinear simulation for the switched reluctance motor (SRM) is developed. It is used to analyze the drive system and to study its dynamic performance and torque control. The simulation calculates the phase currents and motor developed torque from a measured or computed flux linkage-current data array. The technique is computationally efficient and uses less input data than previously known procedures. A dynamic analysis is introduced for torque control. Four control parameters are proposed and a comparative study for these parameters is given. Simulation results are given to evaluate the different control parameters.
Volume 53, ISSUE 2 (MAY - AUG), 2019
This paper illustrates the analysis of different types of converter used in Switched reluctance motor for torqueControl. Torque control in switched reluctance motoris complicated by its highly nonlinear magnetization characteristics. Alsominimization of torque ripple in Switched reluctance motor is a challenging task in applications like electric vehicle and servomechanism where high speed and smooth control is required.This paper compares the simulation results of different types of converters used in switched reluctance motor drive system. Performance of asymmetric converter fed closed loop switched reluctance motor, asymmetric bridge converter fed switched reluctance motor using proportional-integral-derivative controller, asymmetric converter fed open loop switched reluctance motor, n+1switch per phase converter has been studied , simulations has been done in MATLAB 2016a simulink environment and the results are compared. The observed factors like, Maximum torque, Minimum torque and torque ripple coefficient are presented. It is concluded that n+ 1switch per phase converter fedswitched reluctance motor has less torque ripple compared to other three methods.
A Review of Torque Ripple Control Strategies of Switched Reluctance Motor
2018
Doubly salient, single energized Switched Reluctance motor is eminently suited for Industrial application of variable speed control .SRM drive is most suited for low cost and variable speed operations. But the major drawback in Switched Reluctance Motor is High torque ripple, mechanical vibration and Acoustic noise. Due to its nonlinearity and doubly salient structure torque ripple becomes inevitable. This paper discussed about the outset of torque ripple and the appropriate methods used so far to diminish the torque swell in Switched Reluctance Motor. Results obtained from the review of all the Torque ripple Minimization techniques are presented. From the results it has been concluded that DTC and DTC with PI &Genetic PI controller gives the least torque ripple when it is used in Switched Reluctance motor drive.
Direct Torque Control of Switched Reluctance Motor
2009
The switched reluctance motors (SRM) is getting increasing attention in the motor drive industry because of its simple control and low cost. But the non-linearity of the SRM drives makes high ripple in the produced torque. In this paper, a direct torque control proposed for decreasing the torque ripples in SRM. In the proposed method, more smooth torque produced than classical PI control while motor working basic speed.