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The paper presents a study for determination the optimal control law for a small horizontal axis windgenerator. Experimentally, using a mixed physical-analog laboratory model, were determined the state variables, corresponding to different wind speed values, for the optimum regimes of the wind turbine, based on the turbine theoretical estimated mathematical model. From a large multitude of possible...
Permanent magnet synchronous motors (PMSM) are attractive candidates in various applications because of their high efficiency, high power density, and high position resolution. In some special applications such as military and aerospace, the torque ripple percentage from PMSM has to be maintained in an acceptable level. This objective drives motivations of either optimum design of electrical machines...
The paper is concerned with the study of a nonlinear speed control loop of an ultrahighspeed turbine-generator set applied in waste and renewable energy recovery system. The target of the study is to compare two speed control configurations and to select one configuration and its optimum control parameters on the basis of a series of systematic simulation investigations. Large signal transient responses...
This paper deals with the voltage and frequency control of an autonomous induction generator (IG). In order to do that, a voltage source inverter (VSI) with a dump load (DL) circuit on its DC side is employed. The IG frequency is controlled by keeping constant the VSI synchronous frequency. For the IG voltage regulation two cascaded regulators are used, which have as reference the line voltage and...
In this paper, an optimal control technique for n-phase permanent-magnet (PM) machines under various open circuit faults is presented. Under the fault conditions, the currents in the healthy phases are controlled to compensate phase loss and to produce the required output torque. The proposed control technique ensures continuous operation of the machines while producing minimum torque ripples and...
Interior permanent magnet synchronous motors (IPMSM) gain importance due to their high torque per volume ratio particularly for hybrid electrical vehicles. However, unlike to standard control theory, the torque control strategy for these motors is not apparently due to their reluctance torque, which is typical with interior magnet design. In this contribution, a control strategy is presented, which...
Direct torque control (DTC) technique is used for induction motor (IM) control. Due to the high switching frequency, nonpulse width modulation (NPWM) techniques are frequently preferred. Four different switching algorithms using hysteresis and nonhysteresis controllers are proposed and compared. Drive with torque reference, with speed reference in steady-state and dynamic modes are controlled using...
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