Minimal Switch Step Tracking Control of Switched Systems with Application to Induction Motor Control

TL;DR

This paper introduces a minimal switch step tracking control method for hybrid systems, specifically applied to induction motor control, achieving fewer switches and improved performance over traditional methods.

Contribution

It proposes a novel hybrid system-based switching strategy that minimizes switching frequency in step tracking control, with a practical application to induction motor control.

Findings

Reduces the number of switches compared to direct torque control.

Provides a simple and efficient control algorithm.

Demonstrates superior performance in switching reduction.

Abstract

The problem of step tracking control with a switching input and without any continuous-valued inputs is considered. The control objective is to reduce the number of switchings to a minimal value. This approach finds interesting applications when switching comprises costs and should be avoided. To solve the problem, a state dependent switching strategy should be designed and the resulting closed loop is indeed a hybrid system. Therefore, first we investigate the conditions on a hybrid system for being the desired solution. Then, we propose a method for designing the switching strategy such that the closed loop as a hybrid system solves the problem. The proposed method is applied to the induction motor control problem which results in relatively simple and efficient control algorithm. Comparison with the direct torque control for induction motors show that our method has a superior performance in reducing the number of mode switches.