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.
This paper proposed the new control method of the sensorless dual parallel Induction motor drive system which can maintained the steady speed under unbalanced load condition. This method uses new modified observer design technique for mono inverter dual drive system of same parameters and ratings connected in parallel. The simulation work has been reported for different step changes in speed for balanced...
The Permanent Magnet Synchronous Motors (PMSM) have gained an increasing interest recently. The wide varieties of applications of PMSM drive make it necessary to achieve fast and reliable control system. At the basis of analysis of the mathematical model of PMSM and the principle of current hysteresis PWM (Pulse Width Modulation) is proposed. In MATLAB/Simulink, the simulation model of whole system...
This paper presents the experimental validation of an efficient position control scheme, based on the speed smooth VSC (Variable Structure Control) algorithm with an adaptive gain for the indirect vector control of the induction motor. The position loop is regulated with a Proportional controller and the speed loop incorporates a smooth and adaptive VSC regulator, while in the current loops incorporates...
This paper deals with speed and rotor flux estimation of induction motors via Extended Kalman Filter (EKF). The filter is designed starting from a discrete time model obtained by means of a first order discretization of the original nonlinear model of the induction motor (IM). In order to obtain accurate estimation of the above mentioned variables, the load torque is included into the state variables...
For doubly fed induction machines operating as wind generators (DFIG), the terminal voltage and the active power delivered to the grid are controlled by a PWM converter linked to the machine rotor. The monitoring of the direct and quadrature axis components of the rotor voltage makes possible the control of the terminal voltage and active power, respectively. Currently, this control is performed by...
Renewable energy sources have the ability to provide electric power in rural areas whenever available. Although it is cheap, clean and abundant, the variation of output power with the variation of wind speed can cause significant power quality issues, especially in the case of a standalone generation system. This paper studies a network presenting a rural load, such as a small village, fed from a...
In order to deal with the uncertainties of permanent magnet synchronous motor, the moment of inertia, viscous damping coefficient and load torque are online identified simultaneously based on recursive least-square (RLS) estimator, which is composed of RLS estimator and a torque observer. Then, a novel self-tuning PI controller is real-time designed according to the identified parameter based on pole...
Doubly fed induction generator DFIG operating in standalone mode is described. Analysis of single phase model allow for the selection of the filtering capacitance connected to the stator. The standalone DFIG is compared to the classical synchronous generator with DC excitation current. Method of output voltage control using PI controllers of the rotor current is shown. Decoupling between the amplitude...
In this document a new proposal of speed vector control of induction motors based on robust adaptive VSC (variable structure control) law and its experimental validation are presented. This control scheme uses the SVPWM (space vector pulse width modulation) instead of the traditional current hysteresis comparator, because the space vector modulator eliminates the instability risk when the motor works...
This paper presents a fuzzy sliding mode controller used for switched reluctance motor speed regulation. Based on the technique of variable structure control (VSC) with sliding mode, we can construct the controller that possesses the merits of both fuzzy controller and variable structure controller. It is called a "fuzzy sliding mode controller" (FSMC). It provides a simple way to solve...
The field-oriented control of induction machines is widely used in high-performance applications. However, detuning caused by parameter disturbances still limits the performance of these drives. In order to accomplish variable-speed operation, conventional PID-like controllers are commonly used. These controllers provide limited good performance over a wide range of operation, even under ideal field-oriented...
This paper presents a strategy used to appropriately excite and control the desired output active power of an asynchronous generator fed by a current controlled three-phase voltage source inverter. A DC voltage control loop, with a classical PI controller, is used to maintain at a reference value the DC bus voltage of the source inverter under a large rotor speed variation. The proposed asynchronous...
The paper presents a comparative study of two different speed observer techniques for a sensorless induction motor drive. Both Model Reference Adaptive System (MRAS) and sliding mode control theories are considered. The speed estimation algorithms based on both techniques are derived and implemented in a simulation program. The robustness of both speed estimation algorithms against load torque changes...
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.