Comparison of different schemes without shaft sensors for field oriented control drives

Abstract

In this paper, several schemes for field-oriented control (FOC) of induction machines without speed sensors are compared. First, a review of the different speed estimation techniques is presented. Then FOC drives using each estimation method are simulated. Finally the results are compared, following a set of criteria which allow to assign "figures of merit" that can be used to choose the proper scheme, depending on the specific application.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>