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This paper considers the inductance spatial distribution of Interior Permanent Magnetic Synchronous Motors (IPMSM) in various load conditions. The IPMSM machine possess a unique relationship between phase inductance and rotor position, that make it possible to implement sensorless control by extracting rotor position information from the inductance distribution. During the past two decades, many sensorless...
A new position-sensorless method has been developed for a permanent magnet synchronous motor (PMSM) drive at low speed. This method utilizes the induced voltage caused by magnetic saturation of PMSM. The rotor position can be detected by using the open phase voltage of a conventional 120-degree commutation. No harmonic injection is needed. This paper discusses the principle of the proposed method...
In this paper a comprehensive mathematical model of surface mounted permanent magnet synchronous machine (SPMSM) is developed, in which the nonlinear inductance is expressed a composite function of the rotor position and the stator current. With all the parameters identified experimentally, the new model incorporates both the structural and the saturation saliencies. A sensorless drive system is proposed...
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