- Docente: Angelo Tani
- Credits: 6
- SSD: ING-IND/32
- Language: Italian
- Teaching Mode: Traditional lectures
- Campus: Forli
-
Corso:
Second cycle degree programme (LM) in
Mechanical Engineering (cod. 8771)
Also valid for Second cycle degree programme (LM) in Mechanical Engineering (cod. 8771)
Learning outcomes
The student acquires the knowledge of the main types of electric drives used in industrial automation. In particular, the dynamic models of electric machines, useful to implement torque and speed control schemes, will be developed. The student will be able to select, size, and simulate the electric drive more suitable for the specific application.
Course contents
DC motor drives
Characteristics of the DC motors. Speed control by field and armature winding regulation. Constant torque and constant power operations. Feed drives and spindle drives. Dynamic model of the DC motors. Control principles for torque and speed. Control schemes for torque and speed. Analysis and tuning of the regulators. Applications.
DC brushless drives
Operation principle of DC brushless motors. Supply sequence as a function of the rotor position. Six-step operation. Dynamic model of DC brushless motors. Control schemes for torque and speed. Applications.
AC brushless drives
Introduction to synchronous motors. Surface mounted permanent magnet motors. Inner permanent magnet motors. Reluctance motors. Synchronous motor starting. Speed control by power converters. Multi-motor drives. Dynamic model of synchronous motors. Operating principle of AC brushless motors. Field-oriented control. Control schemes for torque and speed. Analysis and tuning of the regulators. Analysis of torque and speed performance limits. Applications.
Induction motor drives
Introduction to induction motors. Speed control by power converters. Open-loop control schemes. Constant V/F control. Acceleration ramps. Closed-loop control schemes. Slip control. Constant torque and constant power operating range. Dynamic model of induction motors. Field-oriented control. Control schemes for torque and speed. Rotor flux estimation. Analysis of torque and speed performance limits. Analysis and tuning of the regulators. Applications.
Stepping motors
Simplified dynamic model of stepping motors. Supply circuits and control principle. Instability problems at low and high speed. Analysis of performance limits. Applications.
The lessons are supported by exercises with Personal Computer.
Readings/Bibliography
The pdf files of the slides utilized during the lessons are available.
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.
Teaching methods
The lessons are supported by exercises with Personal Computer.
Assessment methods
Oral examination.
Teaching tools
Lessons and exercises are carried out with the help of a personal computer and a computer projector (Power Point, MATLAB).
Office hours
See the website of Angelo Tani