A sensorless Direct Torque Control (DTC) of a Permanent Magnet Synchronous Motor (PMSM) drive using a high frequency hf voltage injection technique without compromising the simplicity of the original DTC algorithm, is proposed in this paper. A new hf injection algorithm, in which the hf carrier is introduced by the direct modification of the fundamental voltage vectors of a Matrix Converter (MC), is developed and explained in detail. The position signal is then obtained from the direct demodulation of the res…
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