B8525 - AZIONAMENTI ELETTRICI FAULT TOLERANT LM

Learning outcomes

The student knows the operating principles and design cues for electric drives for industrial automation. Moreover, the student is able to use the main tools for preventive fault diagnosis will be investigated, relying on AI and decision making techniques.

Course contents

DC motor drives

Dynamic model of DC motors.

Current control and controller tuning.

Speed control through armature and field regulation.

Constant-torque and constant-power operation.

Axis and spindle drives and their fields of application.

Drives with brushless motors with trapezoidal back-EMF (DC brushless)

Structure and operating principle.

Torque and speed control schemes.

Asynchronous motor drives

Open-loop drives.

Constant V/f control.

Acceleration ramps.

Closed-loop drives and slip-frequency control.

Constant-torque and constant-power operating regions.

Dynamic model of asynchronous motors.

Field-oriented control.

Torque and speed control schemes.

Rotor flux estimation.

Analysis of torque and speed performance limits.

Analysis and sizing of controllers.

AI-assisted tuning of electric drives

Main artificial intelligence tools for electric drives.

AI-assisted control optimization and tuning.

Readings/Bibliography

1. A.E. Fitzgerald, C. Kingsley JR, A. Kusko: “Macchine Elettriche”, Franco Angeli Editore, Milano, 1978.
2. J.M.D. Murphy, F.G. Turnbull: “Power Electronic Control of AC Motors”, Pergamon Press, Oxford, 1988.
3. I, Boldea, S.A. Nasar: “Electric Drives”, CRC Press, New York.
4. P. Vas: “Vector Control of AC Machines”, Oxford University Press, New York.
5. T.J.E. Miller: “Brushless Permanent-Magnet and Reluctance Motor Drives”, Clarendon Press, Oxford, 1989.
6. T.J.E. Miller: “Switched Reluctance Motors and their Control”, Clarendon Press, Oxford, 1993.
7. T. Kenjo: “Stepping Motors and their Microprocessor Controls”, Clarendon Press, Oxford, 1985.
8. W. Leonard: “Control of Electrical Drives”, Springer-Verlag, Berlin, 2001

The course presents and summarizes several topics; therefore, lecture notes prepared directly by the instructor will be distributed to students and made available through the virtuale.unibo.it platform.

 

Teaching methods

The course is divided into two parts:

• lectures aimed at exploring the course contents in depth;

• numerical exercises for the analysis and simulation of electric drives, using MATLAB/Simscape.

During the practical sessions, students will be able to simulate the dynamic behavior of the electrical machines and control systems studied in the course.

Assessment methods

Assessment of learning will be carried out through a written examination, aimed at evaluating the acquisition of the knowledge covered in the course programme, and through a report on the practical activities.

The report on the practical activities must be submitted before the written examination.

The written examination consists of a number of questions designed to assess the student’s ability to:

• correctly use the tools of electrical engineering and electromechanical energy conversion;

• describe the operation of electric drives;

• illustrate the operating principles of electric drives and evaluate their performance;

• represent control schemes.

The final assessment will take into account the student’s clarity of presentation, autonomy, and rigour in answering the questions.

The report on the practical activities must include all the numerical simulations carried out during the course.

Students with learning disorders and\or temporary or permanent disabilities: please, contact the office responsible (https://site.unibo.it/studenti-con-disabilita-e-dsa/en/for-students) as soon as possible so that they can propose acceptable adjustments. The request for adaptation must be submitted in advance (15 days before the exam date) to the lecturer, who will assess the appropriateness of the adjustments, taking into account the teaching objectives.

Teaching tools

Lectures are delivered with the support of a PC and video projector using PowerPoint. PDF files of the slides presented during the course are made available.

Practical sessions are held in the classroom with the support of a PC and video projector using MATLAB/Simscape.

Office hours

See the website of Alberto Bellini