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.
As the main power source of the industrial system, the control accuracy of a motor directly affects the efficient operation of the system. In this paper, an adaptive control strategy based on disturbance observer is proposed for a Permanent Magnet Synchronous Motor (PMSM) with multiple disturbances. Firstly, the multiple disturbances in a PMSM are divided into the modeled load and the norm bounded...
The paper presents a method to estimate the rotor position, speed and load torque of the PMSM drive. Estimation is based on an extended dynamic model of the PMSM and is done using sequential observers. A first observer estimates the EMFs of the motor; these are used to compute the rotor position angle. The EMFs along with the angle are used as inputs to a second observer which estimates the speed...
In order to further improve the performance of sliding mode variable structure control for sensorless control of permanent magnet synchronous motor (PMSM). Analyze the problems of singularity, chattering, and slow convergence of the terminal sliding mode control. A new reaching law based on the nonsingular terminal sliding mode control is proposed, the advantages of the reaching law and nonsingular...
The speed regulator designed with single-degree-of-freedom(l-DOF) PI control in permanent magnet synchronous motor(PMSM) vector control system cannot provide the best properties of command tracking and disturbance rejection for the speed loop. Thus, combined with two-degree-of-freedom(2-DOF) control, a 2-DOF P-PI speed regulator is designed by adding a filter on the basis of 1-DOF PI speed regulator...
This paper addresses the robust stabilization problem of a permanent magnet synchronous motor (PMSM). In order to optimize the speed-control performance of the PMSM system with different disturbances and uncertainties, Sliding mode control design for the PMSM is developed. We discuss in this paper how to achieve and maintain the prospective benefits of sliding mode control (SMC) methodology combined...
In this paper, the mathematical model of Permanent Magnet Synchronous Motor in static two-phase coordinate frame is introduced. Based on this, the extended sliding mode observer and phase-locked loop are designed in the control system. the three-phase asynchronous motor is controlled using SVPWM control strategy. The control system is simulated by MATLAB. The simulation results show that the proposed...
In this paper, a dead-beat direct torque and flux control with a novel sliding-mode stator flux observer is proposed for electric vehicle (EV) drives. Compared to the direct torque control, the proposed scheme exhibits both static and dynamic performances. Since the system parameters have impact on the control effect of the permanent magnet synchronous motor (PMSM) deadbeat-direct torque control (DB-DTC)...
The authors have proposed a new suppression method of the 6th-order torque ripple of permanent magnet synchronous motors (PMSMs). The proposed method can estimate the harmonic components in the flux-linkage which is the cause of 6th-order torque ripple. And, the proposed method does not use a torque meter, and estimate the harmonic components by mainly using current sensors of the inverter. By simulation...
The paper presents a method to estimate the speed and rotor position of the permanent magnet synchronous motor (PMSM). Estimation is done using cascaded sliding mode (SM) observers. A front observer estimates the EMFs of the motor in the stationary reference frame; these are obtained by filtering the manifolds of the SM observer. The EMFs are passed to a back SM observer that estimates the speed and...
The electromagnetic torque of permanent magnet synchronous motor (PMSM) affects the power distribution precision in the electro-mechanical transmission (EMT). This paper proposes a torque observers for PMSM. Based on the mathematic model of the motor, command torque and the measured rotor speed, we can observe the actual torque precisely, moreover, the power of electric path is more accurate. The...
A novel design of a proportional-integral-differential equivalent controller using state observer based Extended Kalman Filter (EKF) for a Permanent Magnet Synchronous Motor (PMSM) is proposed. The EKF is constructed to achieve a precise estimation of the speed and current from the noisy measurement. Linear Quadratic Regulator (LQR) technique is used to construct a proportional integral derivative...
This paper presents a full order state observer of stator flux based on parameter adaptive identification for the direct torque control (DTC) system of surface permanent magnet synchronous motor (SPMSM) drive, in order to improve stator flux observation under motor parameter variation. The full order state observer of stator flux is established on the fixed a-ß coordinate, and another adaptive stator...
In this paper the use of a Reduced Order Extended Kalman Filter, to estimate the rotor position of a Permanent Magnet Synchronous Motor, in coordination with a Predictive Torque Controller is proposed. The observer integrates the information provided by the fundamental model and the anisotropies of the machine, allowing for a wide operation range. The scheme takes advantage of the nature of the predictive...
In this paper, permanent magnet synchronous motor was the controlled object. According to its mathematical model, a new position observing system was designed based on sliding mode theory, which used sliding mode observer instead of the traditional position sensor. This design replaced the traditional switch functions with continuous saturation functions in the sliding mode observer, and the result...
Permanent-magnet synchronous-motor is a multi-variable, non-linear, strong coupling system that is highly sensitive to the outer interfere and inter perturbation. To improve the system robustness, the adaptive back-stepping control of permanent magnet synchronous motor based on slide mode observer is put forward. Based on the mathematic model of permanent magnet synchronous motor and the theory of...
Recently, sensorless controls, which eliminate position and speed sensors in a permanent magnet synchronous motor drive, have been much studied. Most sensorless control algorithms are based on the back-EMF and speed estimations which are obtained from the voltage equations. Therefore, the sensorless control performance is largely affected by the parameter errors of a motor. This paper investigates...
The paper presents an EMF and speed estimator for the nonsalient permanent magnet synchronous motor (PMSM). The method uses two cascaded sliding mode (SM) observers and is realized using only the measured voltages and currents of the motor. A first SM observer estimates the EMFs of the machine in the stationary reference frame. These EMFs are passed as inputs to a second SM observer that estimates...
A haptic system is an articulated mechanical structure with motors, sensors, embedded electronics as well computer software allowing force feedback. It enables the user to interact with virtual reality through the sense of touch and sight. It has two main operating modes. In the blocked mode the haptic system should be able to reproduce virtual shocks. In the transparent mode, the haptic system should...
This paper presents a review in state of the art techniques for position sensorless permanent magnet synchronous motor drives. In particular adaptive methods like estimators based on Model Reference Adaptive Systems, Observer Estimators like Luenberger observer, Reduced Order Observer, Sliding Mode Observer and Kalman filter are presented.
In this paper, a flatness-based multivariable control of a permanent magnet synchronous motor (PMSM) as the main drive of a pressurised water supply system is presented. The fluidic subsystem consists of a pump and a storage volume connected to the high pressure side. The pump has to provide the supply volume flow into the storage volume, whereas the drain volume flow is considered as a disturbance...
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.