What Are Transformer Losses?

Transformer loss is a concept in modern physics, which refers to the sum of no-load loss Po, short-circuit loss Pk, and stray loss Ps. When the rated voltage is applied to one winding of the transformer and the remaining windings are open, the active power absorbed by the transformer is called no-load loss.

Transformer loss

Right!

Transformer loss is a concept in modern physics and refers to

When used

Correct

It refers to the losses that occur on the leads and the casing and other structural metal parts. The stray losses are related to the load.

Generally speaking, the

The no-load loss and load loss of the transformer refer to iron loss and copper loss, respectively. When the primary winding of the transformer is energized, the magnetic flux generated by the coil flows in the core, because the core itself is also a conductor, on a plane perpendicular to the magnetic lines An electric potential will be induced. This potential forms a closed loop on the cross section of the iron core and generates a current. It seems like a vortex so it is called "eddy current". This "eddy current" increases the loss of the transformer and increases the temperature rise of the transformer's core heating transformer. The loss caused by "eddy current" is called "iron loss". In addition, winding a transformer requires a large amount of copper wires. These copper wires have resistance. When the current flows, this resistance will consume a certain amount of power. This part of the loss is often turned into heat and consumed. We call this loss "copper loss". . Therefore, the temperature rise of the transformer is mainly caused by iron loss and copper loss.
Because the transformer has iron loss and copper loss, its output power is always less than the input power. Therefore, we introduce an efficiency parameter to describe this, = output power / input power.