TinMan Generator Research Moderated Topic

[hoptoad]

snip...
I don't know as I have not done that yet. I was first trying to understand what was up with the rotor coil and brushes.
In time and experiments it will come
snip..

You may find this 'old school' info movie useful. It's a great overview covering a lot of material mentioned on this thread and others.
https://www.youtube.com/watch?v=OpL0joqJmqY

[Grumage]

Dear MileHigh and Mak E.

I was a little shocked to find 7 PM's in my messages box this morning, the most ever has been 2 !!

Please refrain, I'm not interested.

I will pursue my line of experiments, my way, I don't need " guidance. "

Cheers Grum.

[Jimboot]

Dear MileHigh and Mak E.

I was a little shocked to find 7 PM's in my messages box this morning, the most ever has been 2 !!

Please refrain, I'm not interested.

I will pursue my line of experiments, my way, I don't need " guidance. "

Cheers Grum.

HI Guys, yep take me off too please. I tried to understand it but you lost me at "I've added you because.."

[tinman]

I would like to post a few things here,so as those working on this project are not led astray.

As most here will know,i disagree with the arcing at the brushes being from high voltage flyback<--as some refer to it. It is my belief that the arcing is from high current flow at a relatively low voltage.

I would like to post some comments by verpies at OUR here.

Quote TinMan
There is no inductive kickback from the rotor coils of one of these motors, as the coils are all connected-there is never an open circuit for an inductive kickback current to flow out from.   The coils of the rotor form one big current loop


Quote verpies: That's true.
The brushes periodically short windings as they span two commutator segments during their travel.  Filing down brushes minimizes the time during which two commutator segments (and windings) are shorted.

To avoid this shorting altogether, the brushes' tips would have to be filed down to a width less than the gap between commutator segments. This is both impractical and undesirable as this will interrupt the current to the windings and inductors "hate" when this is done to them.

Unlike capacitors, inductors do not create spikes and sparks when shorted, but when opened - they do.
In other words: inductors "like" to be shorted - capacitors do not.

Quote from: TinMan on 2015-07-25, 18:18:53
What you see as high voltage spikes on the scope is only brush noise/arcing. RF is generated from brush arcing due to high current's,and more so bad brush contact to the rotors armature.

Quote verpies:Yes

Quote Luc
You don't want to call it a "flyback spike"... so what do you want to call the effect when a coils current is shut off?
How can the current not reverse direction when the mosfet opens? if it didn't the capacitor would not get charged so fast and so high since the blocking diode only allows reverse current to go through.

Luc
The current will continue to flow in the same direction through that coil/inductor when the current flow supply is cut(becomes open) to that coil/inductor-the current flow dose not reverse in direction in that coil. Only the voltage polarity will change across that coil.

Now i know MH is going to be reading this,and i await his PM as to what i am going to say and show by way of video next(not my video by the way)

What he(and others) think brush arcing is,is high voltage kickback/flyback causing ionization of the air.<--this is not true.
The bright blue colored arcing you see is actually carbon and copper particles being ignited by the high current produced when the brush shorts each coil. During this high current flow,high temperatures are reached which ignite the particles from the brushes and commutator segments-this is why your brushes and commutator ware down after some time.

In the video below,you can actually see these particles still burning away between the commutator segments long after that segment has passed by the brush. You will also note that the arcing takes place exactly as the brush shorts each coil.

Luc
You were wondering why one brush gets hot,while the other stays cool. Well the answer is in the video-can you spot it?-which brush is doing almost all the arcing?-->which brush is the one shorting the coils first-which brush is the leading brush.

Unfortunately the guy said at the end that it was the voltage that was sustaining the arc,but as you can see,particles are still burning away even after the commutator segment has passed the brush. It is important to understand what really is happening,and what the arcs actually are you see at the brushes. The more sparks,arcs and pretty blue lights you see-the faster your brushes are wearing away<-- that wonderful light show is your brushes going up in smoke
Enjoy the video guy's.


https://www.youtube.com/watch?v=gc4l1eooPKM

[tinman]

Dear MileHigh and Mak E.

I was a little shocked to find 7 PM's in my messages box this morning, the most ever has been 2 !!

Please refrain, I'm not interested.

I will pursue my line of experiments, my way, I don't need " guidance. "

Cheers Grum.

Grum
The reason MH has included you in the email chain,is because that lovely fellow EMJ had MH band from posting ,so this is the only way he can put forth his comments at the moment.

As EMJ seems to have gone walkabout,i think Stefan could lift the ban on MH.