Shorting coil gives back more power

[gyulasun]

Hi Oscar,

One more thing I forgot to include:  if you read this in the Romero Muller thread from teslaalset:

"It is very important to understand that the exact adjustment is done under a specific load.
If the load is changed after adjustment, you will lose the cancellation of the BEMF forces.
This is what RomeroUK also pointed out."

then you may NOT wish to use any light bulb (nor any LED) as load when trying to tune a Romero Muller pulse motor/generator setup because the bulb wire changes its resistance nonlinearly.

The best is to use a high wattage resistor as a load (preferably NOT wire wound type).  It is good to test the resistance value when the resistor body is at room temperature and then in a warmed up state, just to learn.

Gyula

[minoly]

Using the roughly wound microwave oven fan core, I was able to see what Romero has been saying.

Loading the pickup coil, causes the RPMs to rise -

You need to fiddle with the coil to rotor and core to biasing magnet distances, but seems easy enough to do

Penno

Penno,
it does work, we found the same.
http://www.youtube.com/watch?v=e-yWi3VApbk

[neptune]

In my shed I have an electromechanical machine that works by coil shorting . The horse shoe magnet does not move . The revolving armature has an iron core . Not sure if it is solid or laminated . The armature has two coils , one of thick wire , called the primary . The secondary is of thinner wire and has many turns . For most of each revolution the primary is shorted . Then , for a few degrees , the short is removed . At this instant , the short is removed and several thousand volts appear across the secondary . The high tension current is collected by a slip ring and brush , and is used to produce a spark outside the machine . The machine was built about 1924 , although earlier examples exist .  Its name ? It is called a "Motorcycle Magneto " and of course is used for ignition . The shorting is done by the cam-operated contact breaker points . To learn of the new , we must revisit the old . I am not sure that shorting coils give more power , but they can of course produce more voltage , in what is in effect a pulsed transformer .

[penno64]

Hi all,

Excuse the mess, but I had to try out the shorting coil using an AC cap.

** false alarm on the battery climb. crappy dmm and idiot user (me) ****

This is getting better

I still must admit, I am lost as how to employ these finds into the romero/mueller design.

Penno

[DimaWari]

Hi penno64


I think I have an idea.. If you may sir, Why not use the driving transistor as shorting device? How? Have you seen how the HOT of TV/Monitor works?