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Doubly fed induction generator (DFIG) is the most implemented electric machine in wind energy conversion systems (WECS) due to reduced size converter, active and reactive power control and economic factors. However, the power electronic stage needs an accurate controller that allows to follow the stator power regulation. As a result, Sliding-Mode Control (SMC) has been successfully implemented in...
Multi-phase induction motor (MIM) drives with polephase modulation (PPM) is suitable for the Electric vehicle(EV) applications because of the reasons, like constant power operation with high efficiency over an extended speed-torque range and high reliability. By using Pole-Phase modulation, in this paper a 45-phase squirrel-cage induction motor (IM) drive is proposed with 1:3:5:9:15 speed ratios for...
This paper presents the electromagnetic design optimization for a 12-slot, 8-pole, concentrated winding, V-shaped magnet Interior Permanent Magnet Synchronous Motor (IPMSM) using a Genetic Algorithm (GA). Three distinct objective functions are considered. These include minimum weight, minimum loss, and a combined multi-objective function to minimize both the weight and the losses. The three optimized...
The synchronous reluctance motor (SynRM) is gaining popularity for general purpose drivers, where the sensorless operation is important. It is well known that, at low-speed, the saliency of these machines can be exploited for sensorless control down to stand-still through high-frequency (HF) signal injection. Nevertheless, the use of a separate HF model makes more complex the integration with the...
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...
For a safe and efficient operation of large variable-pitch wind turbines, the controller plays a vital role. Below the rated wind speed, there is a power-optimal rotor speed for a given wind speed, achieved by designing a generator torque control. Pitch control is appropriate above the rated wind speed, to keep the rotor speed constant. In order to deal with nonlinearities and uncertainties, in this...
This paper deals with the simultaneous application of thyristor controlled series capacitor based damping controller and power system stabilizer for stability improvement of dynamic power system. The Colonal selection algorithm is used to develop the control strategy for thyristor controlled series capacitor based damping controller and power system stabilizer. The new approach employs time-domain...
Switched Reluctance Motor (SRM) presents simple construction, high starting torque, wide speed range, high efficiency and high reliability which are appropriate for an Electric Vehicle (EV) drive system. However, SRM has some issues such as high torque ripple, acoustic noise, vibration due to non-linearities, and require a position sensor for control. The purpose of this paper is to compare two different...
Knowing the force exerted by a human operator while he/she is performing a specific task is important in many different field. For instance, limiting or optimizing the effort in sport activities allows for the development of specific training patterns for athletes, while knowing the effort made by a worker when he/she lifts a weight is important from the point of view of the safety. The effective...
In motion control systems, disturbance suppression control is necessary to realize high precision control. Conventionally, control methods are designed on the basis of temporal dynamics. However, most disturbances are generated and related to moving conditions and actuator structures. In this paper, circle systems such as circle movements and structures are modeled, and a circle disturbance observer...
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