Sensor-less Control of PM Motor using Full Order Flux Observer

Abstract

This paper describes sensor-less vector control method of a synchronous motor with a permanent magnets. We examined the vector control system that used the full order flux observer constituted on the stationary frame. First, a function of this system is explained. This flux observer is converted to the transfer function block diagram which consists of the compensating filter and the vector oscillator. This observer gain can be determined by setting the frequency characteristics of this compensating filter. Then, the design rule that the frequency bandwidth is shown. Lastly, we prove this system has enough stability even in the high-speed region by the experimental results.