Estimação de posição e velocidade de uma máquina síncrona a ímã permanente.

Abstract

This work presents a study about the main characteristics of the permanent-magnet synchronous machine with sinusoidal back electromotive force presenting the mathematical models and operation. A technique to determine the machines parameters is proposed regarding to obtain the phase-to-phase inductance profile obtained from current pulses. The experimental results were used in the system control. On the other hand, the permanent-magnet synchronous drive control requires the rotor position information, thus rotor position sensors are necessary. However, rotor position sensors represents some drawbacks such as increasing cost, volume and reducing the system reliability. Thus, several research have been addressed in self-sensing control strategies. In this manner, is analyzed a rotor position estimation technique based on back-electromotive force. For low speed operation is proposed two techniques for rotor position estimation, they are based on high frequency signal injection combining with parameter estimation. Experimental results shows their feasibility in self-sensing control. The control system was implemented in a experimental setup developed in the laboratory.