How much amperes are needed for a newman motor?

[khabe]

Oh dear, dont be so discriminating,
We are the men, not maiden.
This area presuppose cool head and good sense of humour - it is not for blessed virgins and vestals.
I have told several times what is my opinion about Newman machine,  hereby will not repeat it,
But anyway - I asked many times - why carbon brushes, why not mosfets ...
Hartiberlin speaks on  New Newman Motor Replication thread
Quote:
"The effect is there to produce additional energy via this galvanic dissimular metal commutator sparking and it recharges the batteries.
It is just a direct carbon conversion to electrical energy, but very efficient !"

Of course  I know nothing about Newman motors but now its seems like nobody knows 

ciao,
khabe

[Michelinho]

Re kahbe,

It is just a direct carbon conversion to electrical energy, but very efficient !"

That is a theory. It has not been proven so far and I haven't come across a proof of it yet.

The carbon brush is certainly the best contact brush available but for other reasons. I do not promote its use before you have finalized  the basic setup.

1- Most of the Newman motor I have seen are small with very little torque. A carbon brush needs a certain amount of pressure  to secure the contact slowing down the replication ability to turn freely.

2- To set them up is a lot of work. You need a larger and more complicated commutator that will rob the little replication of any useful work and also custom built adjustable brackets.

3- They last a very long time (wear and heat resistant).

4- They provide a dirty signal that promotes strong bemf.

5- They are tougher and more reliable than transistorize equivalent mosfet included. They will survive mishaps and abuse.

I have the carbon brush set for my replication but the motor is not yet ready to have them incorporated at this stage of testing. The brush is only a tiny part in Newman Motor design and far less important than the commutator itself.

Take care,

Michel