Artificial Intelligent Techniques for Electric and Hybrid Electric Vehicles

14Basics of Vector Control of Asynchronous Induction Motor and Introduction to Fuzzy Controller

S.S. Biswas*

M. Tech (PED), Engineer In Charge (R&D), BHAVINI, Kalpakkam, India

Abstract

From early 1900s when the speed control of the prime mover was concerned, separately excited DC machine were dominating in the field control of any electrical machine. A separately excited DC machine can be controlled in a decoupled manner but for combustion engines, the torque and speed are highly coupled in nature. In V/F control to change the frequency we need to change the voltage to maintain the flux. But the problem is the transfer function of the system is of higher order, may be of 5th order transfer function. Due to this higher order system effect, the flux response becomes sluggish and it takes quite more time to settle down to the desired value. To improve the performance, vector control method of squirrel cage asynchronous induction machine is evolved which is nothing but to operate squirrel cage asynchronous induction machine analogous to a separately excited DC machine to obtain a better dynamic response. A complete analysis and simulation of Indirect Field Oriented (IDFOC) control of asynchronous squirrel cage induction motor (ASCIM) and circuit concept is included in this chapter.

Keywords: Separately excited DC machine, squirrel cage asynchronous induction machine, PID controller, fuzzy logic, vector control

14.1 Introduction

In rotating electrical machine, electrical energy ...