#### Swend

##### Full Member level 4

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Hi friends.

I would like to know the loss (power/energy) in a air-core pulse transformer of my own fabrication.

What we are looking at is this:

I'm measuring voltage with two identical 100:1 voltage dividers 100MΩ∥22p/1MΩ∥2.2nF.

I'm measuring current with two uncalibrated but identical Rogowski coils, I suspect the error in current magnitude could be ±10% but in any case the error will be the same on both coils.

Here are my measurements from both primary and secondary side of the transformer.

X-axis = nanoseconds

The voltage is being stepped down, but the current is almost identical on both side, which is puzzling to me. I would have expected the current to increase on the secondary side as voltage is stepped down.

So how do I go about determining the transformer loss?

I would like to know the loss (power/energy) in a air-core pulse transformer of my own fabrication.

What we are looking at is this:

I'm measuring voltage with two identical 100:1 voltage dividers 100MΩ∥22p/1MΩ∥2.2nF.

I'm measuring current with two uncalibrated but identical Rogowski coils, I suspect the error in current magnitude could be ±10% but in any case the error will be the same on both coils.

Here are my measurements from both primary and secondary side of the transformer.

X-axis = nanoseconds

The voltage is being stepped down, but the current is almost identical on both side, which is puzzling to me. I would have expected the current to increase on the secondary side as voltage is stepped down.

So how do I go about determining the transformer loss?

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