Handbook of Asynchronous Machines with Variable Speed [Hardcover]

This handbook deals with the asynchronous machine in its close environment. It was born from a reflection on this electromagnetic converter whose integration in industrial environments takes a wide part. Previously this type of motor operated at fixed speed, from now on it has been integrated more and more in processes at variable speed. For this reason it seemed useful, or necessary, to write a handbook on the various aspects from the motor in itself, via the control and while finishing by the diagnosis aspect. Indeed, an asynchronous motor is used nowadays in industry where variation speed and reliability are necessary. We must know permanently for the sensitive systems, the state of process and to inform the operator of the appearance of any anomaly and its severity.

Foreword xiii

Introduction xvii

Chapter 1. Sensors and Electrical Measurements 1

1.1. Optical encoder 2

1.2.The velocity measurement 7

1.3. The resolver 9

1.4. The isolated measurement 14

1.5. The numerical aspect 15

1.6. The analog to digital converter 16

1.7. The digital-to-analog converter 21

1.8. The digital output 22

1.9. The arithmetic logic unit 22

1.10. Real time or abuse language 23

1.11. Programming 24

Chapter 2. Analog, Numerical Control 25

2.1. Structure of a regulator 25

2.2. Stability of a system 26

2.3. Precision of systems 30

2.4. Correction of systems 31

2.5. Nonlinear control 34

2.6. Practical method of identification and control 35

2.7. The digital correctors 36

2.8. Classical controllers 45

2.9. Disadvantag