Characteristics of a Transformer

20Dec

Characteristics of a Transformer

Characteristics of a Transformer

 

All transformers share some common features regardless of their type:
1.The frequency of input and output power is the same
2.All transformers make use of electromagnetic induction laws
3.The primary and secondary coils are devoid of electrical connection (except for auto transformers). The transfer of power is through magnetic flux.
4.No moving parts are required to transfer energy, so there are no friction or windage losses as with other electrical devices.
5.The losses that do occur in transformers are smaller than those in other electrical devices, and include:
1)Copper loss (electrical power lost in the heat created by circulation of currents around the copper windings, considered the heaviest loss in transformers)
2)Core loss (eddy current and hysteresis losses, caused by lagging of magnetic molecules in response to the alternating magnetic flux within the core)
Most transformers are very efficient, delivering between 94% to 96% energy at full load. Very high capacity transformers may deliver up to 98%, especially if they operate with constant voltage and frequency.

All transformers share some common features regardless of their type:

1.The frequency of input and output power is the same

2.All transformers make use of electromagnetic induction laws

3.The primary and secondary coils are devoid of electrical connection (except for auto transformers). The transfer of power is through magnetic flux.

4.No moving parts are required to transfer energy, so there are no friction or windage losses as with other electrical devices.

5.The losses that do occur in transformers are smaller than those in other electrical devices, and include:

1)Copper loss (electrical power lost in the heat created by circulation of currents around the copper windings, considered the heaviest loss in transformers)

2)Core loss (eddy current and hysteresis losses, caused by lagging of magnetic molecules in response to the alternating magnetic flux within the core)

Most transformers are very efficient, delivering between 94% to 96% energy at full load. Very high capacity transformers may deliver up to 98%, especially if they operate with constant voltage and frequency.