GENERATOR- YOU DO THE IN/OUT POWER MATH

[mscoffman]

You might be right about all of that. I am currently constructing a minature full wave bridge rectifier.
I will dump all the AC output into it. Sure there will be some power loss but it then becomes very easy to compare input to output power as both are now DC.  Hi frequency AC is tricky to measure correctly.

@magnetman

I want to commend you for doing the logically correct thing. For small
devices >400Watts it makes sense to make power measurements
at 12Vdc or there abouts because the current is higher and it's
easy to filter the signal so that the time constant of the filter is
longer than the gating time of the instrument(s). Accurately
measuring the power of an AC signal with instrumentation is almost
the definition of an impossibility. I don't care who or what is doing it
- I don't trust it.

If you want to give yourself some more accuracy build a rectifier
bridge from four Schottky or Germanium diodes capable of handling
the current.

If you downconvert to twelve volts DC you can use an automobile
lighter inverter to step it back up to utility AC voltage. With certain
conversion inefficiencies.

You can also use variac AC variable auto-transformers to "split" the AC
power so you can use it like a CVT continuously variable transmission
for electricity. Within limits you can adjust a paths power by setting
the AC voltage. Assuming you don't have switching power supplies.

:S:MarkSCoffman

[e2matrix]

Hi magnetman,  Nice work.  I caught your more recent vids too I believe.  I just ordered some of the transistors and diodes from the Davro/Bedini circuit you sent.  My biggest holdup will probably be winding a coil.  What have you found as a good source of magnets? 
Cheers

[DeepCut]

Hi Tom it's me, Gary

I have been following in Tom's footsteps with this one, albeit a much rougher version.

Details :

Pickup coil is 600 turns (818 feet) of SWG #30 (0.254mm) magnet wire, resistance at 84.6 Ohms.

Magnet is Neodymium 20 dia x 20mm long with 6mm hole, approx. 6,100 Gauss.

Axel is 6mm carbon rod.

The drive coil/circuitry is Bedini w/o the charging battery component.

It doesn't need a Bedini circuit, a pulse generator would accomplish the same thing.

I am inputting 9VDC @ 0.07A.

I am rectifying the output, full-wave, and getting 36VDC.

The meter is reading no DC current !?

I put a filament bulb (12V, 0.08A, 0.96W) as a load and it lights but is flickery.

My meter leads are long, especially with extra clips attached, and they go up to 4 feet away.

Can anyone tell me why the DC current reading is zero ?


Gary.

[Bruce_TPU]

You might be right about all of that. I am currently constructing a minature full wave bridge rectifier.
I will dump all the AC output into it. Sure there will be some power loss but it then becomes very easy to compare input to output power as both are now DC.  Hi frequency AC is tricky to measure correctly.

Hi Tom,

Great job so far with your experiments.  What you have written is exactly correct.  Rectify it using one of the two types of diodes that Mark wrote of.  They are for high speed switching and should work just fine.  AC measuring against DC has fooled many a well meaning soul. 

I also wrote in your other thread, a means to DOUBLE your output, but have not heard back from you.  You may want to look at that down the road.

Wishing you accurate success,

Bruce

[DeepCut]

DELETED , figured it, doh !