Maxwell equations, Hopkinson´s law, Esson´s coefficient, cubage, motor, generator. DC machines, functional principle, constructional implementation, basic equations. Commutation, armature interference and its influence, losses, efficiency. Dynamo separately excited, shunt excited, serious excited, compound excited, characteristics. DC motor separately excited, shunt excited, serious excited, compound excited. Transformer, principle, constructional implementation, signification, using, basic equations. Substitution diagram, phasor diagram, idling, short circuit operation, losses, efficiency. Three-phase transformers, parallel connection, unbalanced consumption, autotransformers. AC machines, turning magnetic field, asynchronous machines, slip, operation modes. Asynchronous machines, principle, constructional implementation, basic equations. Substitution diagram, phasor diagram, idling, short circuit operation, losses, efficiency. Torque characteristic, Kloss´ relation, start, speed control, braking. Synchronous machines, principle, constructional implementation, basic equations. Alternators, synchronous motors, compensator, phasor diagrams, V curves.
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The aim of the course is to elucidate problems of electric machines functional principles, constructional implementation, basic equations, DC motor and dynamo separately excited, shunt excited, serious excited, compound excited characteristics, one-phase and three-phase transformer principles, types, and operating modes, asynchronous and synchronous machines signification, using, operating modes, substitution diagrams, phasor diagrams, torque characteristics, methods of start, speed control, braking.
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