Sensorless Position Control of Induction Motors

摘要: Concepts for sensorless position control of induction motor drives rely on anisotropic properties the machine rotor. Such anisotropies can be incorporated as periodic variations magnetic saliencies in various ways. The built-in spatial anisotropy is detected by in- jecting a high-frequency flux wave into stator. resulting stator current harmonics contain frequency com- ponents that depend rotor position. Models saliency serve to extract signal using phase-locked loop techniques. A different approach makes use parasitic ef- fects originate from discrete winding structure cage It has merit providing high resolution incremental positioning without sensor. practical implementation identifi- cation, and high-accuracy system are