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This paper proposes a configuration of wind turbine using a doubly fed induction generator (DFIG) in single-sided grid connection. The stator of the machine is connected with a direct power grid, and the rotor is controlled by an inverter without any external power source. This is called a single external feeding of DFIG (SEF-DFIG). The conventional DFIG uses an additional grid power converter to...
This paper presents a new sensorless method for vector control of Doubly Fed Induction Machine (DFIM) where the stator is connected to the grid. The proposed observer in the reduced order estimates the rotational speed and the stator voltages, using only rotor voltages and currents. It has the similar structure with the conventional back-EMF estimator for Permanent Magnet Synchronous Machines. It...
This paper describes a new position sensorless control method based on the high frequency rotating voltage signal injection to an Interior Permanent Magnet Synchronous Motor (IPMSM) drives. In this method, the rotor position can be directly calculated from four successive sampled current and voltage values. Compared to conventional heterodyning process, the proposed method is simple to implement and...
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