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#Post#: 20--------------------------------------------------
Lynx Joule Motor
By: Dean Date: March 19, 2013, 7:45 pm
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I saw your videos today on the Lynx Joule Motor and I noticed a
couple of things that need improving.
First - the Timing Cam is causing all kinds of shaking. A Cam
in a gas motor always has a second one 180 degrees from the
first so the shaft is balanced. Mounting a second cam on your
motor will make it run smooth and your RPMs will increase as a
result. Alternatively, why don't you take the cam off and imbed
a small Magnet into your flywheel? (plus a small counter weight
on the opposite side) You could then use a reed switch or a
hall effect switch to turn on your transistor.
Second - The bridge rectifier in your circuit is only using one
diode. Attached is a simplified circuit diagram of what you are
currently using.
Your motor speeds up with the diode or bridge in place because
one half of the voltage cycle of the red coil discharges through
that diode and the both coils magnetic field pushes the motor.
(Increasing Torque) The other half of the voltage cycle goes
back through the battery and gives it a small charge. Your AC
voltage is doing two jobs at once - very effective.
One thing that your videos do not explain is the direction of
the turns for each coil and which wire goes where for each coil.
Could you explain that?
[attachment deleted by admin]
#Post#: 21--------------------------------------------------
Re: Lynx Joule Motor
By: admin Date: March 19, 2013, 8:37 pm
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You inspired me to get that motor out again. Hurray, it still
works! If timed right it can run quite fast and with nice
torque.
I know you are right on all your points. If I get time I will
try some of those ideas and report back.
#Post#: 24--------------------------------------------------
Re: Lynx Joule Motor
By: admin Date: March 20, 2013, 9:19 pm
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Dean,
I removed the cam, reduced the resistor to 200 Ohms and couldn't
find a 15 v zener. I put in a 12 v zener. The cam was replaced
with a tiny magnetic relay that bounces off and then latches as
the N/S rotate.
Super high rpm and high torque on 12 volts. Very smooth. So
torquey that I have to hold the mount down or it wants to
turntable. I just got it running really nice but its time to
call it a night. I have a suspicion that the power consumption
isn't too bad because voltage doesn't drop.
Thank you for motivating me to resurrect this Joule Motor.
Rpm - 5000, voltage at startup was 12.58, after five minutes
running voltage was 12.60
I'll clean up the wiring and shoot some video.
#Post#: 26--------------------------------------------------
Re: Lynx Joule Motor
By: admin Date: March 21, 2013, 8:08 pm
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The goal is to make a very efficient brush-less DC motor. It
may not be a very good design, just something stemming from the
Joule thief circuit, bedini motors, window motors etc... The
idea is to send the flyback from the rapid collapse of the
primary coil back through the secondary, and also use the AC
generated as the magnets swings past to regenerate the battery
while running. It's no where close to a self runner. When the
motor is running it outputs about ten percent of the power it
takes to run. And it runs about ten percent faster if the
output is disconnected. Can't get something for nothing.
If I was to make this motor again I would wind the primary and
secondary together to capture the collapse of the magnetic
field. In this design the coils are separate.
I do like the ease of timing, no steel laminates, and no
commutator.
Here is some video.
HTML http://www.youtube.com/watch?v=Me0wjN4kSxY
HTML http://www.youtube.com/watch?v=Me0wjN4kSxY
#Post#: 28--------------------------------------------------
Re: Lynx Joule Motor
By: Dean Date: March 22, 2013, 11:12 am
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I don't think you realize what is happening with the current
flow. Attached is a flow diagram. The red arrows is current
flow from the battery, Green arrows is the flow from the
secondary coil and the purple is the flow for the primary.
I don't really see allot of back EMF - your magnet is
controlling allot of it. (Maybe)
Your Motor is more a generator than a motor. The secondary is
driving through the primary the same time as the battery
(Forcing the battery to work less.)
It might be possible to draw less power from the battery by
shortening the duration of the transistor on time and still keep
this thing going.
You do need a 15v Zener because a battery can charge to 14v and
you will limit the charge otherwise.
Also, putting sheet metal strips outside the wires for each leg
of the coil run will concentrate the magnetic field from the
magnet increasing power generation and more speed.
[attachment deleted by admin]
#Post#: 31--------------------------------------------------
Lynx Joule Motor - Improved Circuit
By: Dean Date: March 22, 2013, 5:38 pm
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See Attach diagram:
I looked at your circuit and I noticed that the Zener can be
eliminated. This is going to drive the motor faster because you
are no longer having a 12v drop for the secondary coil which
means more torque. Ideally a 14v Zener in this spot will help
limit overcharging, but a regular diode will work.
You inspired me to build this motor - PLEASE explain the coil
windings! (Clockwise or Counter-clockwise and which wire
attaches where)
[attachment deleted by admin]
#Post#: 32--------------------------------------------------
Re: Lynx Joule Motor
By: admin Date: March 22, 2013, 7:51 pm
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I didn't try to think about which way the coil start and end
wire would go. I first set up the drive coil because it doesn't
matter. I noted which way the motor ran and where in relation
the North and South poles were. Then I isolated the secondary
coil and gave it a small voltage to see which way the motor
would turn. The motor should turn the same direction.
I really think if you are going to do this you should think
about winding the two coils together. So when the magnetic
field collapses you get a spike in the other.
#Post#: 33--------------------------------------------------
Re: Lynx Joule Motor
By: Dean Date: March 22, 2013, 11:50 pm
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It does matter somewhat. When electricity flows through a coil
- it sets up a N pole or a S pole magnetic field through the
center depending on the direction of current. Flip the coil
over or reverse the wire leads and the polarity of the field
also flips. Your Primary coil determines the direction of the
motor spinning, but it is critical that the Secondary coil is in
phase with the Primary, otherwise the Secondary current will
oppose the Primary and the result is poor performance. The fix
is easy, just reverse the wire leads on the Secondary coil.
I think you got it right the first time with your motor. (50 -
50 chance)
Also, mixing the two wires together would increase the back EMF,
but my guess would be that you could not spin the motor or you
would have poor power output. The point is, your motor really
is more of a generator than motor. Each coil is always
generating electricity from the spinning magnet and the battery
power is only there to keep the speed up on one half cycle. The
other half cycle, the power generated is pushed back into the
battery. At 5000 rpm, thats allot of pulses being feed back and
those pulses are coming from the magnet independent of the
battery, so anything that can be done to increase power from the
magnet and decrease power usage from the battery is a worthwhile
goal.
#Post#: 34--------------------------------------------------
Re: Lynx Joule Motor
By: admin Date: March 23, 2013, 8:00 am
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I like your willingness to stop for a second and explain things.
For anyone reading this, that is really helpful. Yes, every
thing about a mechanical design this small and with so much
ambition "matters". I should have said that figuring out which
coil wire goes to which point in the circuit is very simple.
Finding where the magnetic reed or hall effect transistor will
go is equally simple. As soon as I had the reed switch made and
the wires soldered the motor started. I was holding it two
inches from the motor and I could change the motor timing by
moving my hand.
#Post#: 36--------------------------------------------------
Re: Lynx Joule Motor
By: Alvaro Date: March 26, 2013, 2:37 pm
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hello all
I wish to be polite with this my first post here
First let me say that I followed your work at the OU forum (and
learned a lot) I even replicated the Lynx joule (ringer ?)
Also readed all related with the Lynx Joule motor there.
As you were mentioned today in another thread (lenzness ) I got
to here.
Thanks so much for all the sharing you've exposed everywhere.
Iīm also searching from a looooong time ago for a looped
motogen. so any thing related attracts me as honey do it to a
bee !! ;D
I think that your circuit is related someway to one I saw (and
used) time ago which is at the page:
HTML http://www.totallyamped.net/adams/index.html
page 6 - figure 19
(I do not copy-paste here as I do not have permission, and donīt
know if itīs OK)
Iīll try to replicate your motor with the last mods.
Will post if any results.
Cheers
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