The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The multi-degree-of-freedom spherical driving joint with direct bearing driven by spherical motor owns high mechanical integrity and has many advantages such as control and trajectory planning. This paper presents a novel multi-degree-of-freedom spherical reluctance driving joint with magnetic levitation, and analyses operation mechanism, and next deduces the joint's magnetic conduction of the gap...
In this paper, a combined control strategy of Single Neuron PID and normal PID is proposed for the switched reluctance motor, which has simple structure, adaptability to environmental changes and strong robustness. The input of outer loop is error of speed while output is torque which enters the inner loop of the Direct Torque Control system to control a three phase 6/4 pole SRM whose capacity is...
Switched reluctance machines have emerged as an important technology to be deployed in automotive electric drives; they represent a real alternative to conventional electrical machines in automotives. This paper reviews the technology status and trends in switched reluctance machines. It covers the various aspects of modeling, design, simulation, analysis, and control. Finally, it discusses the impact...
This paper presents a discrete-time variable-structure-based control and a speed estimator designed for a Permanent Magnet Synchronous Motor (PMSM). A cascade control scheme is proposed which provides accurate speed tracking performance. In this control scheme the speed estimator is a robust digital differentiator that provides the first derivative of the encoder position measurement. The analysis...
In high-power current-source inverter (CSI) fed drives, reduction of losses in semiconductor devices and dc-link inductor through the dc-link current minimization is one of the primary goals. In this paper, a control strategy for the high power CSI-fed interior permanent magnet (IPM) drive is proposed for this purpose. This control strategy keeps the dc-link current at minimum level without exceeding...
It was very hard to determinate the accurate mathematical model of switched reluctance motor, which caused a big trouble to analyzing the Switched reluctance motor. For the above reasons, this paper presents a control model which use switched reluctance motor torque for the control volume. According to the variation of torque, control the stator voltage vector and the rotation speed of the stator...
A novel high performance torque control scheme for switched reluctance motors(SRMs) is proposed based on online fuzzy neural network modeling and adaptive sliding-mode current control. Firstly, an adaptive neural fuzzy inference system(ANFIS) is designed to learn the nonlinear static position-torque-current characteristic and the flux-linkage characteristic of an SRM offline. Then each phase torque...
This paper deals with the Direct torque control of PMBLDC motor using hybrid controller (Genetic algorithm and fuzzy logic) to reduce the torque ripple. Though the conventional controllers are commonly used in practice, they have failed to perform satisfactorily under non linear conditions and parameter variations. In the proposed work, a hybrid controller (using genetic algorithm and fuzzy logic...
High performance applications of SR motors strictly depend on accurate modeling (or characterization), as well as an appropriate torque control strategy. Most of torque control strategies need torque feedback for realization. Nonlinearity between electrical and mechanical terminals makes simple analytical modeling impossible by means of measured quantities. Therefore, estimation of the motor torque...
The electric vehicles need high efficient torque control system. Therefore, this paper proposes the novel excitation interval control method. The excitation intervals are concentrated around the rotor position where the derivative of inductance becomes maximum values. The efficiency of proposed method is superior to the efficiency of conventional methods.
The paper presents the orientation detection method of spherical motor based on machine vision to solve the problem about the measurement of the rotor position. A camera is used to capture the image of the rotor painted with special pattern. The position information of the rotor can be derived by analyzing the image. The model of the measurement system is simulated in OpenGL and the measurement errors...
To better torque ripple, the principle, step and implementation method of direct torque control for four phase switched reluctance motor are presented. The four-order orthogonal transformation matrix of flux linkage is derived step by step based on energy conservation principle, and it is put forward that the flux linkage amplitude from coordinate decomposition is 1.4 times more than that from orthogonal...
Characterized by simple structure, stable operation and low production cost, switched reluctance motors (SRM) have a vast potential for application. An excessive running noise, however, is emitted due to their large torque ripple in running. The key to eliminating such noise is to limit the torque ripple in addition to optimization of the design of the motors. In general, it is difficult to define...
This paper presents a fuzzy logic controller (FLC) based tuned proportional-integral (PI) controller for interior permanent magnet synchronous motor (IPMSM) drive. The PI controller serves as the primary speed controller whose gains are tuned by a novel Sugeno type FLC. Thus, the limitations of traditional PI controllers are avoided and the performance of the drive system is improved. A flux controller...
This work proposes an algorithm to control the torque of a switched reluctance machine (SRM). A 6/4 three phases SRM drive is controlled and simulated on PSCAD/EMTDC software. The machine is modeled using an analytical model that takes into consideration the non-linearity of the machine. The control is designed as a Model Predictive Control (MPC) using Discrete Space Vector Modulation (DSVM) with...
The direct-flux field oriented control of Interior Permanent Magnet motor drives is evaluated, with particular attention to very high speed operation in the maximum torque per voltage region. A new control technique is proposed to overcome the stability problem of direct flux control based on flux and quadrature current control. The proposed control is easy to be implemented, it is independent of...
The Intelligent control methods are drawing great attentions due to their strong adaptive ability and learning ability. Because of strongly nonlinear magnetic characteristics of switched reluctance motor(SRM), modeling of the torque characteristics is difficult. In this paper, the new torque modeling approach based on artificial neural network(ANN) is investigated, where the training data are obtained...
The excitation of BLDCM is provided by the permanent magnet, which has many advantages compared with the conventional DC motor. But for the drive, due to the limit of the bus voltage, the operation with speed higher than base speed needs the flux be reduced. The impossibility for regulating the flux of the permanent magnet has become the bottleneck of the speed extension of motor. A square wave current...
It is discussed that the starting performance of SR motor is influenced by different mode of running. On the linear condition, the relation between electromagnetic torque and electric current of SR motor is deduced. The fine performance of the SR motor with small starting current and great starting torque is validated from the research on control mode of the SR motor in low velocity and high velocity...
Based on the rebuilt of control rule base, a modified type PI-like fuzzy logic controller (FLC) with output scaling factor (SF) self-tuning mechanism is proposed in this paper for application in the switched reluctance motor (SRM) drive system. This paper intends to simplify the construction hierarchy and computational complexity of the controller by trimming the number of fuzzy sets in the membership...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.