Newman motor #2 by detrix42

[detrix42]

Hello every one.  I am excited to announce that my second motor, with 26 awg wire, and a slightly modified commutator is working perfectly.  No over unity because I am using such a thin gauge wire. but I believe this motor to be very very efficient.  And yes I have a video:

http://www.youtube.com/watch?v=fdw3DAVuLbA

I believe I am getting over 2000rpm.  I will get an amp meter, and a tachometer soon.

While the video was uploading I ran an off video test.  The test ran for only 50min because it killed a battery. Only one battery got hot, and the machine slowed way down. I replaced the bad battery, and even added one more and it started up with out a problem. 

I am so excited to have a working motor. Thanks to every one who offered advice.
I hope you liked the video.
Cheers.

[detrix42]

I am going to ramble a bit here. Because I don't have an analog amp meter right now, I want to try to calculate some numbers.  Please let me know if I have done something incorrectly.

With my current commutator, there is 6 pulses per revolution.
I think I am getting at least 2000rmp's.  This is 12,000 pulses per minute.
12,000 / 60sec is then 200Hz.
200Hz then means, each pulse is .005 seconds or 5mSec.

would the current be 1/200th of total non-pulsed current???
if it is then with 150v/57ohms of non-pulsed current is 2.63A.
1/200th of that is 13.16mA. 
Would this mean I am using 1.97 watts of power???

I believe I read that 9V batteries have 625mAh (milli-amp-hours)
Does this mean my current set-up could/would run for 47 hours??? That is if I don't kill a battery during that time.

if this is true, this is not bad at all. Again let me know if I have my math right or wrong.
Cheers.

[detrix42]

I tried to run another 1 hour run.  Before the hour is up, one of the batteries started getting hot, and the motor slowed down.  I believe I am doing things right if I am killing batteries.

So now I need a source that can handle the back spike. or figure out how to capture it.

[detrix42]

quick update:  I made a 3min video, technically from a different angle, and I wanted a video that got quicker to seeing the motor running, and not have to wait 5 minutes.

http://www.youtube.com/watch?v=F6qLiAeyPng

If you have any questions, please ask.

[detrix42]

Hello everyone.  sorry that its taking so long since my last post.  But I have finally acquired an analog meter to measure the mA.  It has been along time since I have had to use an analog meter. But I did measure 80 to 95mA.  The voltage while running was 115v.  Batteries are very depleted. Motor only runs for 30 seconds, and then begins to slow down due to lack of current. but currently this means my motor is using 9.2 to 10.925 watts.  This will be greater with fresh batteries. 

I am working on a new commutator. Being made out of a small bicycle wheel rim (no tire on it).