Originally posted by Quantum_well
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The universal grinder motor is a quick easy way to get a set of heavy duty bearing on a large shaft sticking out where normally a huge grinding wheel would be mounted. In this case the rotor with magnets.
The system I am describing and will continue doing so is nothing like the E-Bike demo's that do not use a Variac because the stock bike motor is a 75vDC motor powered by the onboard batteries. We can see it break even with 3 RegenX coils on the generator side with just the weight of the drive wheel (not a persons weight)
Continuing with the first demo's and how they were set up. From the variac to the AC bench grinder motor a power analyzer is placed. This number would be like 75v-85v at 4-5Amps coming in at 300w-400w drive motor input and this is called rotational equilibrium. This number is "0" and is not considered part of the generator efficiency calculation of any given coil.
Remember this is a test bed to calculate generator coil efficiency not a completed practical application including looping and 100's of other possible variables that might effect overall output.
So in the case of the AC plug to Variac the rotor and magnets start turning and we now can introduce a coil with core. So lets say the core and coil were mounted on the bench grinder drive motor (quick/easy) and the input reads 300w. That 300w is not yet counted so this is a "0" . Next the coil (conventional) is connected to a load. Let's say we are getting 70w output at the load but the drive energy side for the bench grinder went up 100w. This is what we can expect which is a 70% efficient generating coil. Or if we were getting 80w output the efficiency is 80%.
That is all Thane is doing, he is finding out how much power ADDITIONALLY is needed adding that figure to the 300w REQ. We started out with 300w REQ then adding 100w more the reading is 400w. Now we loaded the coil to 500w and to input goes up to say 700w? Something like that. Or let's go to a load that pulls 8000w then our input to the drive motor will go up to an additional 10,000w + 300wREQ. This is standard Eff.
Or a 1,000,000w + 300w. You see how the 300w REQ is not worth talking out?
Not so in the case of the new coils. The input never goes up.
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