TinMan Generator Research Moderated Topic

[gotoluc]

Same event as Brad ?

No, unfortunately not!... it's a different kind of event, the kind where they don't let you play with magnets and sparks

I'll do my best to check what will go down... or is it up

Regards

Luc

[MileHigh]

Can we calculate the BEMF as power in? What happens to the heat in that situation? Welcome back

No unfortunately not.  You can look at the BEMF as "recycled" power in.  In other words, let's say you measure 10 watts power consumption by the motor.  Let's suppose that one of those 10 watts becomes a repeating BEMF spike of a certain amount of energy.  So you have already measured and accounted for that BEMF spike in your input power measurement.

Keeping things simple, let's just say that you get one BEMF spike per second, and you use that train of spikes to charge a capacitor.  Since your know that the input power that is allocated towards the BEMF spike is one watt, than each BEMF spike contains one Joule of energy.

You can say that the motor is temporarily storing one Joule of energy per second of input power in the inductance of the motor windings.  That means that that one Joule of energy per second did nothing to make the motor turn, you can't get double time from the same energy that becomes the BEMF spike.

It suggests the classic question that very few people ask or try to answer:  My motor is outputting BEMF spikes, what is the average power that those spikes are running at?  Or you can say, how much energy is there in each spike?  You know the spike repetition rate from your scope.  That means you can work the measurement two possible ways:  You can measure the average spike power and then derive the energy per spike.  Or, you can measure the energy per spike and derive the average spike power.

[Jimboot]

been fiddling with the brushes.
https://www.youtube.com/watch?v=wsBH9ylic74

[Farmhand]

I think in a motor we "can" get back some forward emf produced from the collapsing magnetic field of the coil = Inductive kickback or "Back emf".

I think we must first overcome the Counter emf or "Back emf" the input sees.

I think the best practice is to refer to the energy released by the coil after the intended work is done as something different than the Counter emf the input see's.

In a simple switched coil (pulse motor) with recovery diode situation as an example, the counter emf that restricts input current is I think "backward emf"
whereas the emf produced from the coil when the magnetic field collapses is I think "forward emf".

The energy regained during the process is always a fraction or a part of the energy that is input, and if that energy is then output as electrical energy then it is simply is not output as any other type of energy.

It goes in once and it comes out once, either as waste or as intended mechanical output or as reclaimed electrical energy not wasted or output as mechanical energy. All are parts or fractions of the input energy.
..

[ramset]

I think the heat being generated  should be added to the claimed cop
Don't,t throw the baby out with the bath water.

Caloric measurements should be a part of every experiment ,this thing makes a ton of heat
DONT MISS THAT.......you can run for a month but if your not measuring all that heat....??
How much heat is it making 5...10...20 watts ...

Did somebody say
TPU ??

This needs much more research and development.