Transformer Definitons Flashcards
Magnetic Coupling
Two conductors are referred to as magnetically coupled when they are configured such that change in current flow through one wire induces a voltage across the end of the other wire through electromagnetic induction.
Magnetic Flux
Lines of magnetic force surrounding a magnet or electromagnet.
Magnetic Induction
The production of an electric current across a conductor moving through a magnetic field. It underlies the operation of gnerators, transformers, induction motors, electric motos, synchrounous motors, and solenoids.
Transformer Core
The transformer is used to provide a controlled path for the magnetic flux(lines of magnetic force surrounding a magnet or electromagnet) generated in the transformer.
Turns Ratio
The ratio of number of turns in the primary winding to the number of turns in the secondary winding of the transformer.
Windings
A transformer consists of two windings wrapped around a core. The transformer operates when a source of AC voltag is connected to the primary winding and a load devcie is connected to the secondary winding
Core
Provides a path for the magnetic lines of flux. It is constructed of many layers of thin sheet steel and is laminated to help reduce heating.
Two general types :
- Core Type
- Shell Type
Primary winding
Recieves AC electrical energy from the source.
Secondary Winding
Recieves Electrical energy from the primary winding which in turn serves the load
Voltage Taps
Taps are located on the transformer coil, six taps provide adjustments at 2.5% each, one tap is for 480 volts nominal.
Transforme Ratings
Transformers are frequently rated in KVA or kilovoltamps. The rating tells you the maximum current the transformer can deliver to a load without overheating.
If you know the voltage and the current, the rating can be calculated. If you know the rating and the voltage, the current can be calculated.
