Ok,here is an experiment i did a couple of weeks ago(which i re-ran tonight for this thread),and thought it may be related to this topic-as far as i understand. This is just a very basic experiment,but none the less,it showed me the results i was hoping for.
First up,is it true to say that the higher the value of current flow,the faster the electrons are moving through the wire,when that wire remains the same size(same wire)?,as it is the moving electrons that create current flow-right?
Anyway,the pictures below show my test setup,and it is as follows.
I have a toroid transformer,which is being driven by my variac at it's lowest voltage setting,and is across the 240v winding of the toroid transformer. I then have a soft iron wire loop looped around the toroid transformer,where the loop passes through the middle of the hole in the transformer. I used soft iron wire in the hope of making the wire itself one long conductive magnet. This is to counter the magnetic field that would be built up around the wire when current was flowing through it,as it is my belief that the magnetic field around a current carrying conductor impedes the electron flow.
Around that soft iron wire i have wound insulated copper wire,which i will call the field winding. A DC current is then passed through the field winding in order to produce a magnetic field that is at 90* to that of the magnetic field produced by the current flowing through the soft iron wire loop. The soft iron wire loop includes my .1 ohm CVR-as seen in the pictures below.
So,the single turn loop has an alternating current flowing through it,and the field coil has a direct current flowing through it. The scope is placed across the .1 ohm CVR.
My theory was,once a direct current was flowing through the field winding,we should see an offset in the AC trace across the CVR,where we would see an increase current flow in one direction,and a decrease in current flow in the other direction.
The total power sent to the field winding in this experiment was 1 amp @ .3 volts (300mW). The current value was controlled by way of setting my power supply's current limit to 1 amp
The first scope shot shows the values without any current flowing through the field winding.
The second scope shot show the values with current now flowing through the field winding.
So,without current flowing through the field winding,we have a peak forward current value of 2.217 amps,and a peak reverse value of 2.16 amps--not sure why it has this offset,but it is only small.
With current flowing through our field winding,we have a peak forward current of 2.3 amps,and a peak reverse value of 1.81 amps. So we see a difference of near half an amp in current flow in our soft iron loop.
This tells me that the magnetic field produced in the soft iron wire by the field winding,increases the speed of the electrons flow in one direction,and impedes the electrons flow speed in the other direction.
This also must mean that if the field winding was driven with an AC current (phase correct),we would see an increase in current flow in both directions through our soft iron wire loop--along with a decrease in power consumption from our toroid transformer.
Hope im on the right track here ION.
Brad
P.S--My scope is being powered from my inverter,so as to eliminate any ground loops. My DC power supply also has an isolation transformer,so no ground loops there either. So all three pieces of equipment(the variac,scope and DC power supply) are all isolated from one another. We are also only running at 50Hz,so a very low frequency.
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