Thanks for the info Konehead; i'm having some trouble with efficiency; to much current imput

Hi Marius,

I would suggest you reduce the 12V battery voltage for reducing input current, perhaps a variable voltage source like an LM317 linear regulator could be useful during the tests.  I know this regulator has a low efficiency but you can always consider real efficiency of a motor setup by considering such voltage regulator always has a stabil voltage output and you can surely measure the current as you have done so far.  This way, by sweeping the output from say 3V to 12V with a normal 5kOhm linear potmeter you can have a good test range for seeing how rpm, current, etc  changes.  Use some heat sink for the LM317 if there is a big difference between the input and output voltage, it has an 1 Amper max output current rating.
Here is a schematic but you surely know this regulator: http://www.electronics-lab.com/articles/LM317/   

Gyula

I have recently performed some experiments involving counter emf in a pulsed motor and logged the data. For those of you who are playing with switched mosfets for use in pulsed motor circuits, the information I present may be relevant to you and your own experiments.

Go to this site   www.totallyamped.net/adams and read pages 12 to 14.

I hope the information contained therein is of some help.


Here's a new thread for anyone who wishes to further explore the experiments I've outlined and post their own results.

http://www.overunity.com/12132/re-a-novel-pulsed-motor-circuit/msg314859/#msg314859


Cheers from Hoptoad   .... KneeDeep

Hi hoptoad,
    Thanks for sharing! its very informative...

Hi Kone!
Very thanks for the Canadian data on orbo-motor

Quote from: hoptoad on March 09, 2012, 01:32:41 AM
I have recently performed some experiments involving counter emf in a pulsed motor and logged the data. For those of you who are playing with switched mosfets for use in pulsed motor circuits, the information I present may be relevant to you and your own experiments.

Go to this site   www.totallyamped.net/adams and read pages 12 to 14.

I hope the information contained therein is of some help.


Here's a new thread for anyone who wishes to further explore the experiments I've outlined and post their own results.

http://www.overunity.com/12132/re-a-novel-pulsed-motor-circuit/msg314859/#msg314859


Cheers from Hoptoad   .... KneeDeep

Hi too hoptoad!
Very thanks for your sharing!
Very well done too for your web-site, I very like that way you have to put data on tables, would just miss graphs to be perfect But really, I very like your way to explain everything, every detail with much schematics, pictures and labels for each steps <3 <3 <3 <3

---------
Cheers.