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Permanent magnet synchronous (PMSM) drives become very popular in many industrial applications. Their construction provides better performance and reliability than DC drives. But there is also one significant disadvantage - actual rotor position knowledge is necessary to control the drive even in the case when only speed control is required. A position sensor has to be used increasing the drive cost...
Nowadays, many efforts are made to realize the position/speed sensorless control strategy of permanent magnet synchronous motors (PMSM) to simplify the control structure and cut down the cost. A sensorless control scheme based on a model reference adaptive system (MRAS) with the theory of parameter optimization for the PMSM servo system is described in this paper. The scheme can promptly work out...
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