Electric Machines Fundamentals

Lecturer:

Tutor:

Supervisor:

Department of Electric Drives and Traction

Synopsis:

Electromechanical energy conversion. DC motors and generators, characteristics, control. Magnetic field, armature reaction, commutation. Transformers, equations, equivalent circuit, phasor diagram. Winding connection. Transient phenomena. Induction and synchronous machines, principles, operation, construction fundamentals. Synchronous machine connected to infinite bus. Static stability. Short- circuit. Synchronous motor.

Requirements:

Syllabus of lectures:

1. Electromechanical energy conversion. DC machines, common problems

2. DC motors and generators, characteristics, starting, control

3. Magnetic field, armature reaction, commutation

4. Fundamentals of the general theory of electric machines

5. Transformers, equations, equivalent circuit, winding connections

6. Magnetizing current, transient phenomena. Special transformers

7. AC rotating machines, common problems. Induced voltage

8. Induction motors, operation principles, voltage equations

9. Power-flow balance, torque, circular diagram

10. Starting of induction motors. One-phase induction motors. Harmonics

11. Synchronous machines, realization, operational principles

12. Synchronous generator connected to infinite bus, static stability

13. Synchronous machine fundamental equations

14. Transient phenomena, short-circuit. Synchronous motor

Syllabus of tutorials:

1. Introduction into lab, work safety, laboratory rules

2. Measuring stands, sources, dynamometer control, tachodynamo calibration

3. Solution of DC machines problems

4. Separately excited dynamo, magnetization curve, terminal characteristics

5. Shunt DC generator, exciting, terminal characteristics

6. Magnetic field in the DC machine air gap

7. Separately excited motor, starting, speed control

8. Speed control of loaded DC motor, loading characteristics

9. No-load and short-circuit measurement of a transformer, equivalent circuit parameters

10. Three-phase transformer winding connections

11. Induction machine torque-speed characteristic

12. No-load and short-circuit measurement of a synchronous machine

13. Loading of an autonomous synchronous generator

14. Connecting of synchronous generator to infinite bus. Dynamic processes

Study Objective:

Study materials:

Chapman,S.J.: Electric Machinery Fundamentals McGraw-Hill, U.S.A., 1985

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans: