Estratégias de controle desacoplado de fluxo e conjugado para acionamentos com máquinas assíncronas.

Abstract

This work presents a systematic study of several proposed control strategies to ensure uncoupling flow and torque, in the static drive systems of asynchronous machines. The decoupling between the flow and the conjugate is the appropriate choice of a set of state variables representatives of the machine, and a coordinate system of reference to the actuation model. This approach use conventional discrete linear controllers to constant parameters, in the flow control meshes and conjugated. The flow-conjugate decoupled control strategies are classified according to the flow component used for keep the magnetic excitation constant and the variable used to control the electromagnetic torque. Magnetic excitation can be controlled through stator flow, rotor flow or air gap flow. The conjugate can be controlled by frequency of slip of the variable chosen to excite the machine, as well as the quadrature component (usually current) with the excitation variable.