I have been researching transformer testing techniques.
Here is some dope on B-H curve tracing.
This curve diaplays the magnetic properties of the transformer core.
It is basically a visual display of how a core beomes magnitized when a signal is applied, and how it de-magnitizes after the signal is removed. There is a little lag in the magnetics, and it varies depending on the core material. It is also called a hysteresis curve. The curves can be traced at different frequencies, different voltages and different transformer loads, so building up a file on one transformer can take a while if you include phase shift, frequency response, DC resistance, inductance, distortion, leakage, capacitance......
:roll:
If anybody has any additional info on testing, feel free!
I have the Crowhust article alrerady.
Dang it! I think Scenaria's new toy will do all this automatically!
I know it will do phase shift.
Here are some links that have some B-H circuits.
Some are simple, some are complicated:
http://www.ee.surrey.ac.uk/Workshop/advice/coils/BH_measure.html
http://www.clarkson.edu/class/ee311/Experiment4/Lab4_F02.PDF
http://www.epanorama.net/documents/components/transformers.html
http://www.ee.psu.edu/grimes/publications/BHLooperPaper.pdf
Here is some dope on B-H curve tracing.
This curve diaplays the magnetic properties of the transformer core.
It is basically a visual display of how a core beomes magnitized when a signal is applied, and how it de-magnitizes after the signal is removed. There is a little lag in the magnetics, and it varies depending on the core material. It is also called a hysteresis curve. The curves can be traced at different frequencies, different voltages and different transformer loads, so building up a file on one transformer can take a while if you include phase shift, frequency response, DC resistance, inductance, distortion, leakage, capacitance......
:roll:
If anybody has any additional info on testing, feel free!
I have the Crowhust article alrerady.
Dang it! I think Scenaria's new toy will do all this automatically!
I know it will do phase shift.
Here are some links that have some B-H circuits.
Some are simple, some are complicated:
http://www.ee.surrey.ac.uk/Workshop/advice/coils/BH_measure.html
http://www.clarkson.edu/class/ee311/Experiment4/Lab4_F02.PDF
http://www.epanorama.net/documents/components/transformers.html
http://www.ee.psu.edu/grimes/publications/BHLooperPaper.pdf