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Simple GRAY motor design   Message List  
Reply | Forward Message #27 of 75 |
Hi all

Here are 4 small JPG photos below of an inexpensive low-voltage
Gray/Muller motor I call it....there are no magnets in this motor
design, so that makes it a GRAY motor in my book, but the coils and
cores are arranged "axial" in the manner of a Muller side-saddle type
motor, which would have an even number of Pmagnets N-S in the rotor,
and an odd number of stator coils if it was really a Mullermotor.

This motor however has just two cores (4 coils) mounted in the 12"
wide and 1" thick white cutting-board plastic flywheel/rotor.
All the cores are 1/2" round welding-rod steel....

There are quite thick winds over the cores, about 16GA thick magnetic
wire, and only two layers of winds on the core....the wind is pulled
back to the rear of the core after the first wind, and then wound in
same direction as the first layer along the core for the 2nd layer
("directional")

The idea for the two rotating rotor-cores, is to wind the magnetic
wire around each side of the welding rod ironcores mounted "through"
the flywheel in the same direction; and so the two coils wound on
each side the rotor will imitate the rotor-coils actually being a
large permanet magnet, with N on one end, and S on the other of the
two rotor-cores.

I found that for some reason, the power from this motor (shaftpower
at least) is much stronger in attractive mode than repulsive.
Usually they are about equal in torque/power, and the classic-GRAY
scheme is repulsive coil-coil power, but in this motor the
attractive "implosion" of the three coils and two cores (a single
rotor core and two stator cores on each side) makes for over twice
the shaft-power it seems than the repulsive mode. Probably at higher
voltage inputs, this might change - I have only tested this motor at
12 and 24V. It draws a lot of amps, (3 to 5) but I have ways of
reducing this down to 1A or mabye 500ma later on (Pmagnets and short
pulse width)...

The test I want this motor to perform first is to be a high-amperage
sucker of a pulsemotor in a "split-the postive" circuit, where three
batteries in series for 36V run the motor, while three others
inparalell at 12V receive a charge from being in series from the OUT
of the motor to the IN of the NEG side of the 36V stack. Then after
that test, a diode recovery circuit will be run into those charge
batteries, or 3 more charge batteries to see how much that improves
things compared to having no recovery circuit at all...Rain
jsutposted a circuit here a few days ago that combinse the two I want
to try out...

so this is my testing work coming up - once all that is finished,
then I'll add neomagnets to this design (transforming it into a
GRAY/MULLER/KONEHEAD motor then(!))and the rotational-position of
these added permanent magnets, which will be mounted right next to
the stator coils in each coil bank, and will be right "after" the
coil against coil power stroke (permanent magnet flux bridges I call
them)... So this means 12 magnets will be added later on...but there
will be added magnets only just next to the statorcoils, the rotor
will stay the same. I can also wind pickup winds around these
Pmagnets too, for more electtrical power form it wiht no extra draw
downfall (these winds might be OU just themselves)

I want to compare classic GRAY-power, compared to GRAY power with
permanent magnets added with this motor, and hopefullly it could be
something easily reproduced in any country in the world - it would be
nice if it performs jsut as good without the Pmagnets as with them,
(it wont I;ll bet) then the world wouldnt have to depend on China for
Neobydimium magnets in the future for OU motor stuff......this is
what the split-the-positive circuit will do - "negate" the heavy amps-
draw becasue a charging battery stack always receives the same amsp
into it as the amps drawn into the motor, so more amps-draw for more
shaft power wont really matter since more amps IN means more amps OUT
(and into charge stack).

Anyways here it is below in the links - roller-brush commutators are
not mounted in pictures - in a nutshell, it is a simple design of 2
rotor cores against 6 stator core positions (12 stator cores total)
the motor will be firng only 6 times a revolution...
This is the chassis from the "Croatian 12 vs 11 GRAY motor" that I
posted about a month or so ago here...I made it simpler in design
with only 14 coils to wind instead of 34... and am not doing the odd
rotorcoils vs even statorcoils thing with it now.
Anyone can make one of these for around $50 or $75 in parts from a
hardware store like Home Depot (they have welding rod and even will
sell the plywood coil banks already cut round for $5 or so) - the 12
neo magnets not shown mounted yet would be extra cost later on....

http://www.geocities.com/koneheadx/1plyG.JPG
http://www.geocities.com/koneheadx/2plyG.JPG
http://www.geocities.com/koneheadx/3plyG.JPG
http://www.geocities.com/koneheadx/4plyG.JPG

ciaoK





Wed Aug 18, 2004 6:45 am

koneheadx
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Message #27 of 75 |
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Hi all Here are 4 small JPG photos below of an inexpensive low-voltage Gray/Muller motor I call it....there are no magnets in this motor design, so that makes...
koneheadx
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Aug 18, 2004
6:46 am
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