Back EMF Experiment

last updated:31 May 2002

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Back EMF Experiments (31 May 2002)

There are many claims as to where the excess energy come from in free energy machines. I am interested in finding the source, so that the effect can be optimized. One of the claims is that the excess energy comes from the collapsing magnetic field in a coil. I set up an experiment to test this theory using one of the coils from my Adams motor/ Generator. This is a ferrite core (low loss) 1/2 in. diameter 2 in. in length wound with 20 gauge wire. It is driven by an FET part number NTE2377. (Note: I have not measured o/u in my Adams motor to date, but I'm still working on these motor conceptes also)

With this device, and with many of my experiments, I measure D.C. power in and convert to DC power out. (P=I*V,P=I^2*R,P=V^2/R) I do this for two reasons: 1. Its easier to make the measurement (no integration, no phase angles of I vs. V, don't have to worry about inductive/capicitve effects,no non-sinusoidal 'sine waves'...etc.) and 2. the measurements are much more accurate. There are some losses associted with converting the signal back to DC, but I try to keep them small, and I'd rather have and accurate and conservative measurement.

This data was taken with a constant frequency (f=8360 Hz) (50% duty cycle) at different input voltages. I can get very high efficiencies over the input voltage range, but not over unity. This devices efficiency is above 90% and can be used to transform the voltage efficiently.

This data was taken with a constant input (Variac setting) 'voltage in' at different frequencies. I can get very high efficiencies over the frequency range , but still no o/u.

This data was taken with a constant input (Variac setting) 'voltage in' at different frequencies. But with a 10% duty cycle instead of a 50% duty cycle. Again no o/u. (more to come)

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