Transformers
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With a transformer alternating voltages are stepped down or, therefore
increases or reduces. However this change of the tension leads also to
a change of the maximally entnehmbaren river, at the exit (secondary
winding) of the transformer.
The tension down transformed rises the too entnehmbare river. The tension up-transformed sinks the too entnehmbare river. The relationship between tension and river is in reverse proportionally to each other.
The transformer, briefly Trafo, affects the initially, the primary winding, like a consumer R for its source of alternating voltage, if the Trafo is loaded with nominal load. Unloaded the Trafo works like an inductance. The output side, which works secondary winding, as source of alternating voltage with source tension U0 and internal resistance rib.
The size of the tensions in the two coils corresponds accurately to the relationship of their numbers of turns.Example: A transformer with 1000 turns on the primary coil, 100 turns on the secondary winding and 220 V of Primärspannung produces an open circuit voltage of 22 V in the secondary winding. These tensions develop in the no-load operation enterprise of the transformer. The actually usable operating or rated voltage is however reduced around the internal losses of the transformer.
The Trafo is in principle from two coils, developed with same or different number of coils, lying next to each other. On the entrance coil a changing magnetic field is produced. On the output winding an induction voltage is produced. The height of this tension depends on the turnsrate of the primary and secondary winding of the transformer.
Applications are above all over match, energy transfer, clocked power packs/switch power pack, galvanic separation, instrument transformer and resistance transformationAbout the Author
david
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