Challenges in the Design of a Sensorless Control for the SR Motor

Resumen: This article presents the major challenges to design a state observer for the Switched Reluctance motor when the measured signals are only the electrical ones, that is, phase currents and voltages. The results presented in this paper are based on the observability analysis of the small signal model. These are: 1) the model is non-uniformly observable, i.e., the observability depends on the input, 2) there are singular points on the observability map which are related to the motor commutation. To overcome the first problem it may be possible to design an immersion-based observer, an example of this method for a nonuniform observable system is presented to show its potential. On the other hand, the observability analysis results are used to propose a very simple example of a sensorless method based on sinusoidal inputs for low speed. The objective is to design a stator phase commutator based in current measurements only.

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Alejandra de la Guerra & Alejandro Gutiérrez–Giles. Challenges in the Design of a Sensorless Control for the SR Motor. Memorias del Congreso Nacional de Control Automático, pp. 334-339, 2019.

Palabras clave

Sistemas Electromecánicos, Control de Sistemas No Lineales

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