Electrical Machines I

Lectures:
1) Types of electric machines. Materials used by electric machines design.
2) Windings in electric machines
3) Enclosure, shape and cooling. Laws, equations and methods used in electric machines.
4) Principle and description of transformers. Operation states. Equivalent circuit. Phasor diagrams.
5) Three-phase transformers. Winding connection. Operation in parallel. Special types of transformers.
6) Magnetic field of electric machines. Types and function of winding.
7) Use of asynchronous machines. Design types and foundation dates. Function and operation state.
8) Energy bilance of asynchronous machines. Equivalent circuit. Torque.
9) Circle diagram of asynchronous machine.
10) Starting and speed control of asynchronous motors.
11) Asynchronous generator and brake.
12) Single phase induction motors.
13) Influence of harmonics on a asynchronous machines running.

Exercises:
Calculation excercise 1 of transformers.
Calculation excercise 2 of transformers.
Calculation excercise 1 of asynchronous machines.
Calculation excercise 2 of asynchronous machines - circle diagram design
Calculation excercise 3 of asynchronous machines.

Laboratories:
Familirization with laboratory practice, safety training, mark condition
Transformer measurement(no-load, short-circuit).
Measurement by three-phase transformer winding connection.
No-load test and locked-rotor test of asynchronous motor and load test of asynchronous motor.
Test
Credit.

Projects:
Project consists of elaboration of protocols from laboratory exercises, with values, diagrams and evaluation of results.