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 paper presents a prototype of a high-speed Switched Reluctance Motor designed for power tools and results of simulations of the control system of this motor. The basic aims of the simulation was to determine the efficient control of the motor phases and to determine the electromagnetic torque ripple. Simulations have shown the necessity of modifying the drive control algorithm to reduce the amount...
In this paper, two topologies for SRM drive is proposed, namely five level asymmetric neutral point clamped and asymmetric modular multilevel converter for high speed and high power SRM drive. For high speed operation, back EMF of the motor increases to high levels. Therefore, input voltage should be more than back EMF in order to force current into the winding. Multilevel converter can apply variable...
Switched reluctance motors (SRM) offer various advantages of higher speeds, phase independence, high torque and high reliability, but it also has drawbacks of high torque ripple, complex control and noise. This paper presents the simulation of the dynamic model of switched reluctance motor based on MATLAB SIMULINK and compares the performance of the motor after implementation of voltage control and...
In order to solve the problems caused by the asymmetry among phases due to their different relative positions to magnets in the conventional doubly salient permanent magnet motors, two transposition design methods are proposed in this paper, and then employed to the design of doubly salient memory motors which incorporates the concept of the memory motor into the hybrid field excitation doubly salient...
In the traditional direct torque control (DTC) of induction motor, the low order harmonic component of stator current is very large when the motor is running at low speed. It leads to high torque ripple of motor in low speed. To solve this problem, a new control method has been proposed in this paper. Base on the traditional DTC method, electromagnetic torque and flux models have been analyzed. To...
This paper presents a fuzzy logic controller (FLC) based direct torque control (DTC) scheme for speed control of IM drive over a wide speed range. The FLC is used to adjust the bandwidth of torque hysteresis controller in order to reduce the torque ripple of developed torque and hence to improve motor dynamic response. The effects of torque hysteresis band amplitude on the torque ripple of IM are...
Torque ripples exist in permanent magnet synchronous motors (PMSMs) mainly due to non-sinusoidal flux density distribution around the air-gap. These torque ripples vary periodically with rotor position and are reflected as speed ripple, which degrades the PMSM drive performance, particularly at low speeds. In this paper, a simple expression based on the harmonic compensation technique and Fourier...
The direct torque control (DTC) technique has been widely used as a control strategy for motor drive system. High torque ripple is a major problem when the motor is running at low speed in DTC system. By analyzing the causes of torque ripple, it is can be found that the change of the speed error signal is a good indicator to determine the situation of motor torque ripple. In this paper, a DTC strategy...
The direct torque control (DTC) technique has been widely used as a control strategy for motor drive system. High torque ripple is a major problem when the motor is running at low speed in DTC system. By analyzing the causes of torque ripple, it is can be found that the change of the speed error signal is a good indicator to determine the situation of motor torque ripple. In this paper, a DTC strategy...
The paper analyzes the steady commutation process of the BLDC motor using PWM mode, confirms the commutation time to keep non-commutation phase current amplitude constant during commutation period by way of PWM in the period to implement the compensation control to eliminate commutation torque ripple under both low speed and high speed operation, investigates the effect by PWM mode on a three-phase...
The novel translational meshing motor (TMM) has inherent torque ripple because TMM torque is highly nonlinear relationship between rotor position and phase current. The torque ripple of TMM drive system can cause undesirable acoustic noise and vibration. In this paper, a novel controller scheme for TMM is presented. The controller is based on an adaptive neuro-fuzzy inference system (ANFIS) and combines...
This paper proposes a model of brushless dc motor drive considering behaviour of the motor during commutation and waveform of backemf, for dynamic simulation of Electromechanical Actuator (EMA) under MATLAB/Simulink environment. Ideally trapezoidal backemf is considered in simulations for BLDC motor, which gives a constant torque. Practically, torque ripple exist, mainly due to emf waveform imperfections,...
In a motor-drive system, there are many factors which can be considered as a figure of merit in drive control algorithm. All of these factors should be evaluated simultaneously to achieve the reliable performance of drive. In this paper, an optimization problem is constructed on a direct torque controlled induction motor drive using a candidate from different parts of drive system: inverter loss from...
This paper proposes an active filter (AF) topology to reduce the torque ripple and harmonic noises in a permanent-magnet synchronous motor. The topology consists of an insulated-gate bipolar transistor AF and two resistance-inductance-capacitance high-pass electromagnetic interference (EMI) noise filters, i.e., one in the primary and the other in the secondary circuit of the coupling 1:1 transformer...
Switched reluctance motors (SR motors) have several desirable features, including simple construction, high reliability and low cost. But large torque ripple and expensive position sensors used in SR motor drive systems are considered as drawbacks for wide application. Several studies have succeeded in torque ripple reduction for SR motors using direct torque control (DTC) technique. In this paper,...
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.