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This paper proposed a super-twisting algorithm based sliding mode observer (STA-SMO) for permanent magnet synchronous machine (PMSM) sensorless control, in which voltage-source inverter (VSI) nonlinearity is taken into consideration. A lookup table for online tunning sliding mode coefficients of STA-SMO is obtained based on existing stable conditions. Since mismatch between reference and actual voltage...
Bearingless machines are successfully used for a variety of applications that demand for low mechanical losses, low wear, and low contamination. These machines require exact knowledge of the radial and angular rotor position in order to ensure stable levitation. This information is obtained with different position sensors. Alternatively, a sensorless approach can be used to determine the rotor position...
Some of the remaining challenges of self-sensing control for permanent magnet synchronous machines (PMSM) are: combination of EMF-based and magnetic saliency-based methods, influence of the fundamental current control on saliency-based methods, position-transducerless system identification of key parameters or mitigation of distortion effects, respectively, and reduction of computational effort. The...
In this paper, a rotor position estimation based on a low-resolution position sensor is proposed. As vector control of an ac permanent-magnet synchronous machine requires the rotor position with sufficiently high resolution, the low-resolution sensor signal is transformed into a spatially quantized rotating vector and based on this vector, a vector-tracking observer calculates the corresponding high-resolution...
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