Robert Calloway had a problem posting to the list but he
wanted to share this very positive information;
Subject: Fw: Adams Test motor
Date: Fri, 24 Mar 2000 17:10:55 -0600
From: "Robert"
Hello Jerry, Thought I would forward this message to you
concerning the motor, I worked just about all night trying
to find the problem with it. Cant seem to send to your list.
Do with the message as you wish. Thanks Robert.
----- Original Message -----
From: Robert
Sent: Friday, March 24, 2000 11:36 AM
Subject: Adams Test motor
Hello All, I have just finished testing the Adams test
motor from John Bendini web site that I built. I'm not
versed in transister schematics, but I understand what is
going on electricly in this motor.
I used a 7" new grinding disk for the rotor with (2 ) 1"
round magnets placed 180
degrees apart. I built the (2) coils to his spects. I then
mounted all of this in a crude wooden frame I built.
I used a 3/4" wide by 2" arcoss plastic washer and installed
it on the end of the shaft to use for timing the pulses.I
ganged (2) SP DT micro switches and mounted them over the
plastic washer.
I then drilled 2 small holes 180 degrees apart and installed
a rounded head screw in each hole. The plastic washer turns
with the shaft and the head of the screws activate the
switches.
The first switch is wired to send a pulse to the coils and
the second switch is open from the coil to the battery. When
the coils are off the second switch is closed so that emf
can be sent back through diodes to the battery.
When the coils are sharply cut off, the polarity in the
coils changes, so this has to be wired accordingly. After
playing with the timing and setting rotor magnet gap at 1/8
inch, it runs at about 2000 RPM.
I hooked up a scope and found I was not getting steady
spikes back to the battery. I found that the ganged switches
were the problem.
I replaced them with a DP DT switch and the spikes are
steady now. Folks.. this is for real! No voltage drop in 1
hour running.
Voltage varys from 12.60 to 12.80 continously. I seen surges
as high as 13.90
volts. I fact I was concerned if the battery could take the
surges. I recomend using a gel cel battery, mine is a 7.0
amp/hr.
Being excited, I decided to try to run the motor of off a
precharged 1 farad
25 volt cap. It dont work..the cap runs down rather quickly.
So there has to be something about the battery taking the
spikes that keep it charged.
My thanks to John Bendini and Mr. Adams for this design.
Anyone should be able to build this motor with scavanged
parts found here and there. I highly recomend people start
building this motor.
Regards, Robert H. Calloway
John Bedini's website is located at;
http://www.nidlink.com/~john1/
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