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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...
The rotor position of an interior permanent-magnet synchronous machine (IPMSM) can be estimated without a position sensor by signal injection sensorless control at standstill and/or in very low speed rotating condition. In the signal injection sensorless control, however, the fundamental control performance is limited by the frequency of the injected signal, and no negligible acoustic noise is generated...
This paper proposes a new position sensorless control method based on the high frequency signal injection. The frequency of the signal is increased up to 2/3 of the switching frequency, and the dynamics of the sensorless control can be improved. Furthermore, the audible noise is reduced conspicuously due to the increased frequency of injected signal. In this method, the rotor position is directly...
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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