Transformer Saturation Curve - magnetizing current
Transformer Saturation Curve - magnetizing current
(OP)
I got the transformer saturation curve from the manufacturer. It shows the excitation current vs the voltage.
Is this current pure magnetizing current or it includes copper & eddy losses? Is this the line current during the test or it is the magnetizing only current?
Is this current pure magnetizing current or it includes copper & eddy losses? Is this the line current during the test or it is the magnetizing only current?






RE: Transformer Saturation Curve - magnetizing current
RE: Transformer Saturation Curve - magnetizing current
RE: Transformer Saturation Curve - magnetizing current
plus the resistive or copper losses
"When you are saturating, your excitation current will be much larger than your core losses."
When saturated, there is very little further increase in the magnetizing component of the excitation current, however the increase in resistive or copper losses becomes close to linear with respect to voltage increase.
Note the magnetizing current is one component of the excitation current.
Bill
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"Why not the best?"
Jimmy Carter
RE: Transformer Saturation Curve - magnetizing current
And if the magnetizing current doesn't increase and the losses are linear, to what do you attribute the non-linear current shown in the excitation curve above the knee?
RE: Transformer Saturation Curve - magnetizing current
Waross,
The inductor Xm is non-linear. I should maybe have copied a model diagram that had an arrow crossed through it to show this. When the core saturates it moves into another region that is linear. You can have nice looking waveforms if you super saturate a transformer. They won't match the turns ratio but they won't have the distortion we are used to seeing due to saturation.
RE: Transformer Saturation Curve - magnetizing current