Electrical machines ERASMUS>ELE07

1. Magnetic circuits. Classification of electrical machines and transformers.
2. Transformers: unloaded transformer, equivalent circuit, load transformer operation, phase diagram, three-phase transformers, connection groups, parallel operation.
3. Electric machines - basic concepts: distributed windings, rotating magnetic field, electromotive force excited by a rotating magnetic field, winding coefficients.
4. Inductive machines: construction and principle of operation, equivalent diagram, dependence of torque on rotational speed, machines with a ring and cage rotor, the phenomenon of current displacement in bars, speed control. Single-phase induction motors. Two-phase executive motors. Induction generator.
5. Synchronous machines: construction and principle of operation, phasor diagram, equivalent diagram, idle run and short-circuit of a synchronous generator, characteristics for steady states, open-pole machine, operation of a synchronous generator in the network, permanent magnet machines, starting of synchronous motors.
6. DC commutator machines: construction and principle of operation, winding connection systems, magnetic field in the air gap, armature influence, commutation, compensation winding, generator characteristics, motor characteristics, motor rotational speed control. AC commutator motors.