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The paper describes the dynamic correction for alternative current electric drives based on the positive current feedback. Advantages of this correction before the standard systems of regulation with a negative feedback, and also advantages before vector management are shown. The offered method of correction can find broad application in asynchronous electric drives because doesn't demand an essential...
This paper deals with the speed and position estimation of interior permanent-magnet synchronous motor (IPMSM) and synchronous reluctance motor (SyRM) drives. A speed-adaptive full-order observer is designed and analyzed in the discrete-time domain. The observer design is based on the exact discrete-time motor model, which inherently takes the delays in the control system into account. The proposed...
The paper is concerned with the design of a linear parameter varying (LPV) regulator for controlling the shaft angle and speed of an induction motor. The design is based on recent results concerning LPV systems and ensures stability independently of how the shaft angular velocity, chosen as the varying parameter, changes in time within a suitable compact set. The LPV control system structure consists...
This paper presents an adaptive fuzzy sliding-mode controller (AFSMC) based on boundary layer approach for speed controller of an indirect filed-oriented control (IFOC) of induction motor (IM) drive. In general, the boundary layer approach leads to trade-off between control performances and chattering elimination. To improve control performances, a fuzzy system is assigned as reaching control part...
This paper introduces a direct power control (DPC) method with narrowband disturbance rejection capability for the grid-connected doubly fed induction generator (DFIG). The method is suited for variable speed operation of DFIG, especially in wind energy conversion systems connected to weak networks where voltage unbalance is common. The control framework is based on the linear quadratic regulator...
Parameters of electrical machines are usually varying with time in a smooth way due to changing operating conditions, such as variations in the machine temperature and/or the magnetic saturation. This paper is concerned with robust stability analysis of controlled Doubly-Fed Induction Generators (DFIGs) that takes into account the time-varying nature of the parameter variations as well as bounds on...
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