Selected Problems of Electric Machines

Lecturer:

Tutor:

Supervisor:

Department of Electric Drives and Traction

Synopsis:

Steady state performance of electric machines supplied or loaded by asymmetrical and or non-sinusoidal conditions. Three-phase transformer, three-phase induction motor with capacitor on singel-phase net, torque pulsations, electric machines supplied by electronic converters, brushless DC machines, switch reluctance machines.

Requirements:

Syllabus of lectures:

1. DC machines supplied by voltage converters

2. Three-phase symetrical-components transformation

3. Unbalanced load of three-phase transformers

4. Magnetizing current of three-phase transformer, influence of the third harmonic comp.

5. Asinusoidal supply of three-phase transformer, magnetical core losses

6. Three-phase induction motor under asymmetrical supply, torque ripples

7. Three-phase induction motor on the single-phase net, capacitor determination

8. Magnetic field space harmonics, waves in the torque-speed characterisic

9. Induction motors supplied from the electronic converters

10. Synchronous generator with unbalanced load

11. Synchronous generator with a rectifier

12. Synchronous motor in stepping state

13. Brushless DC machines

14. Switch reluctance machines

Syllabus of tutorials:

1. Instruction on labs safety, organization and laboratory equipments

2. Parameter determination of DC electric machine model

3. Maesurement on the DC machine supplied from a voltage converter

4. Parameter determination of the three-phase transformer model

5. Measurement a the three-phase transformer under unbalanced load

6. Three-phase induction motor model parameter determination

7. Measurement of a three-phase induction motor on the single-phase net with capacitor

8. Synchronous machine model parameter determination

9. Measurement of a non-symmetrical short circuit state on a synchronous generator

10. Parameter determination of a synchronous generator with PM

11. Measurement on a synchronous generator with PM and rectifier

12. Simulation brushless DC motors on a PC

13. Simulation switch reluctance motors on a PC

14. Measurement corrections, student tasks evaluation

Study Objective:

Study materials:

1. Chapman, S.J.: Electric Machinery Fundamentals. McGraw-Hill, USA 1985

2. Glover, J.D.,Sarma, M.: Power System Analysis and Design. PWS Pub. C., Boston 1994

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Elektrické stroje, přístroje a pohony-inženýrský blok (compulsory elective course)
• Elektrické stroje, přístroje a pohony-inženýrský blok (compulsory elective course)