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transformers

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by

Carolina Carmona Giraldo

on 28 May 2013

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Transcript of transformers

A transformer is a static electrical device that transfers energy by inductive coupling between its winding circuits. A varying current in the primary winding creates a varying magnetic flux in the transformer's core and thus a varying magnetic flux through the secondary winding. This varying magnetic flux induces a varying electromotive force (emf) or voltage in the secondary winding.
The principle behind the operation of a transformer, electromagnetic induction, was discovered independently by Michael Faraday and Joseph Henry in 1831. However, Faraday was the first to publish the results of his experiments and thus receive credit for the discovery.[85] The relationship between emf and magnetic flux is an equation now known as Faraday's law of induction:



where is the magnitude of the emf in volts and ΦB is the magnetic flux through the circuit in webers. Laura Carolina Carmona Giraldo
Juan David Marin Loaiza
Agustin Nieto Medina
Carlos Andres Vargas Arguelles TRANSFORMERS CLASSIFICATION OPERATING
PRINCIPLE PARTS: TRANSFORMERS TYPES OF
CONNECTIONS Tank
Core
Coils or Windings
Tap s exchanger
Chassis
Bushing PARTS AND ACCESSORIES Fans
Oil level indicator
Temperature indicator
Internal pressure indicator
Oil sampling valve
Rating plate Transformers can be classified of different manners, according to take as you base the operation, the utilization or the way of the nucleus; That way we have than: loss by currents parasites or foucault
loss by histeresis ACCESSORIES: LOSS IN THE CORE LOSS IN THE COPPER For the operation of distribution: of potency: For the number of phases Single-phase: Three-phase: ACCORDING TO THE KIND OF COOLING Submerged in oil: Dry type: THE NUCLEUS'S FORM Armored nucleus: Not armored nucleus: For his utilization for generator: of substation: of distribution: of instrumentation: In terms of Instalación's
places Type pole: Type vault: Type pedestal: Advantages Little loss of energy
Adjustable voltage
Absence of collector delgas and brushes
Low noise
Resistance to over voltage and over shock dIsadvantages High cost
They can be large and heavy
They produce electromagnetic
fields
Animal interruption
Pollution
Full transcript