A Design of Continuous Deadbeat Controller and Its Application to Speed-control of the Induction Motor

Abstract

In this paper, we propose a new design method of continuous deadbeat control system without using delay-element, and apply it to a speed control of the current type inverter-induction motor system.
The dynamic characteristic of the system is expressed by the step or impulse response, then the deadbeat control signal which designed to minimize the quadratic form of the input and output errors can be easily obtained by the matrix computation using sampled data of these responses.
The method of designing the continuous deadbeat controller which composed of both the pre-compensator and state feedback compensation is derived by use of the sequence of the deadbeat control signal.
An actual continuous deadbeat controller is constructed by the microprocessor and it is found from experimental results that the speed control system proposed here gives stable operations and good transient performances for the step change of the desired value and disturbance.