Milkovic Pendulum motorized Hybrid

[Matthew Jones]

I actually started some of this thread on another post entitled Linear Generator.
But anyway..

YouTube - Bouncer2.MPG

Pay no attention to what I say in the movie. I cannot talk as well as I type, most of the time.

The motor is a simple motor hybrid. I am using magnetic cancellation to push the magnet on the rotor away, and the electromagnet is attracting the magnet on the wheel. The motor is wired as simple motor and is using a mechanical relay for a switch. The motor runs at 120 +- rpms at 12 volt 1.5 amp. The collection in the secondary battery is 1 to 1. No consumption.
The Pendulum is a 60 degree pendulum outlines in the thread for Chalkalis. It weights 1/3 pound exactly.
There is a hinge on 1 end and springs on the other.

I have not measured torque or anything yet because I am looking for some ideas on how to measure, hence the thread.

In the video its hard to tell because everything is shaking but I can lean into the mechanism until the springs are compressed fully and I still cannot stop the linear action. I weigh about 250 and I am leaning into it with my feet planted on the ground.

I'll be adding a small linear generator to capture the output in electricity.

Matt

[rave154]

Matt,

FANTASTIC WORK !!!!!.....ive been dying to see someone motorise the milkovic pendulum thing...and also put a genuine "generator" on the end of it

id have had a crack myself but alas no facilities here for noisy clanky springy things ( damn neighbours ! lol )

LOVE IT SO FAR !!!...


had to laugh when you said "thats a damn 1/3rd pound pendulum whoppin my ass! "

cant wait for the next video !!!!!!!!

p.s is that a door hinge or similar that youve used on the left hand side pivot point ?

[rave154]

absolutely cannot wait for the next video !!!!! ( sorry...im excited !!! lol )

i presume the linear gen wil comprise of...maybe some cylinder magnets?...travelling up and down through a coil ? mounted onto the right hand side( the part thats going up and down )?

but whatevr it is....cant wait to see it

[Matthew Jones]

Ya its a commercial door hinge with sealed bearings. I got some left over from some jobs I have done. I wouldn't by them though a regular hinge works just as well.

I have not decided exclusively on the style generator yet. Most likely though it will be 2 flat plates of steel. One with magnets and the other with coils. In another thread a guy named Dragon showed one.
Heres the thread http://www.energeticforum.com/renewa...enerators.html

More I think about it the more flexible it seems as apposed to other types.


Cheers
Matt

[rave154]

well......whatever you figure out there Matt........i cant wait to see it

[dave_cahoon]

Hey Matt why not use a stepper motor for a genny
To convert to rotation use a rack gear on the linear motion and a pinioun gear in the stepper or other gennerator.
The stepper will spin hard one way then reverse with each stroke up and down of the rack gear.

A focuser for a micro or tele-scope is a good place to find the parts.
with a long rack gear you could put on many generators.

Dave

[Matthew Jones]

Ya I had been thinking about it. I was leaning towards a dynamo or 2 from a wind up flashlight. I got big one that produces 12 volt.

I still have few thing to do to the lever part of it before I can start extracting energy.

I'll probably end up trying several things in the process.

Cheers
Matt

[SkyWatcher]

Hi folks, Hi Matt, very creative work you've done there, looks good. Yes, that sure seems like a lot of force from just a 1/3 pound of pendulum weight, wow. That much force for only 18 watts and are you saying your recovering that full 18 watt input into a secondary battery, if so even better. I also can't wait to see how this works out.
peace love light
Tyson

[marseye]

Hi Matt and all,

Here's just my 2 cents with this idea I had after I first had seen Milkovic's pendulum.

It comprises a bedini-like driven arm, which free extremity is a heavy magnet, and a fixed coil under meant to stay always at the same distance from the passing weight-magnet...

I never made one, but I think it may work fine, if the coil and the magnet are properly designed...

Anyway, your own idea is great , Matt.

Please, just tell me what you think about mine...

[theremart]

RE: Your setup..

Hi Matt and all,

Here's just my 2 cents with this idea I had after I first had seen Milkovic's pendulum.

It comprises a bedini-like driven arm, which free extremity is a heavy magnet, and a fixed coil under meant to stay always at the same distance from the passing weight-magnet...

I never made one, but I think it may work fine, if the coil and the magnet are properly designed...

Anyway, your own idea is great , Matt.

Please, just tell me what you think about mine...

I made one very close to your drawing.


YouTube - Video Veljko Milkovic' - 2 Stage Oscillator with a Bedini pendulum.

Very crude, but it does work.

[Hoxan]

Hello everyone,

Matt you did a great job

My idea is to use electronic circuit to drive the pendulum. Circuit called magbot pendulum: YouTube - Magbot - solar powered pendulum
Beauty of this circuit is its self synchronization so there is no manual tweaking. Magnet passing above coil is inducting some voltage that is triggering transistor to switch polarity in coil to push magnet away. It works for every deflection angle. All you need is enough powerful magnet attached to the pendulum and strong coil.
Its also very easy to masure input energy for magbot pendulum.

Friend tested some configurations in working model, i did some in solidworks. We both end up with the same conclusion. Ideal angle of swinging pendulum is 90° (180 full cycle) and the minimum is 60° (120 full cycle). Only at this angles centripetal force is stronger then gravity force.

At the moment i dont have batteries for camera to take some pics of lego magbot pendulum test. I can show only render of our project:

[Matthew Jones]

Thanks everyone for the good words.

Hi folks, Hi Matt, very creative work you've done there, looks good. Yes, that sure seems like a lot of force from just a 1/3 pound of pendulum weight, wow. That much force for only 18 watts and are you saying your recovering that full 18 watt input into a secondary battery, if so even better. I also can't wait to see how this works out.
peace love light
Tyson

I had the motor pendulum bolted to table and ran it about 14 times (Back and forth) over the last 2 weeks and didn't have any loss. The longest I ran it was 12 hours. I have not checked it yet with the springs and all. I am not sure if they'll effect the performance. Most likely I can tune it back in to shape if it is out. I also want to Hardwire it and use several transistors for switch's and get rid of the relays. They work well and give hard hitting pulse. Transistors are more time consuming to tune. But eventually I go that way...

Hi Matt and all,
Here's just my 2 cents with this idea I had after I first had seen Milkovic's pendulum.
It comprises a bedini-like driven arm, which free extremity is a heavy magnet, and a fixed coil under meant to stay always at the same distance from the passing weight-magnet...
I never made one, but I think it may work fine, if the coil and the magnet are properly designed...
Anyway, your own idea is great , Matt.
Please, just tell me what you think about mine...

I have actually built one just like that. That was the very first idea I had. The pendulum though was probably not heavy enough and was very hard to time. The biggest thing I have been looking for out of the pendulum was a good synchronized input / output. Motorizing the regular setup, has a tendancy to be a little random in its output.
Theremart seems to have gotten it though so its most likely the way, I did it that didn't work.

Hello everyone,
Matt you did a great job

Thanks again for the input and kind words

Matt

[i_ron]

Snip
Thanks again for the input and kind words

Matt

Matt, more kind words coming, lol

Most impressed with the idea of your build. I had not got around to doing a 360 degree pendulum. I have several questions:

Does the coil have a core? about how many turns on the coil, or size of wire and dimension of the coil. I see multi strands? John Bedini builds in your background?

What is the diameter of the "bob" (or radius) and the distance from the hinge
to the centerline of the rotor

Your battery charging could be better explained, What's your timing for the
bemf recovery?

And is the coil on say full time and just switched off to release the magnet?

Thanks in advance

Ron P

[Matthew Jones]

I added another video.
YouTube - Bouncer2_1.MPG

I been trying to control the stroke on it and get real predictable. I am not sure if what I did will help in the long run, but something to learn for sure.

Cheers
Matt

[Matthew Jones]

Matt, more kind words coming, lol
Most impressed with the idea of your build. I had not got around to doing a 360 degree pendulum. I have several questions:
Does the coil have a core? about how many turns on the coil, or size of wire and dimension of the coil. I see multi strands? John Bedini builds in your background?
What is the diameter of the "bob" (or radius) and the distance from the hinge
to the centerline of the rotor
Your battery charging could be better explained, What's your timing for the
bemf recovery?
And is the coil on say full time and just switched off to release the magnet?
Thanks in advance
Ron P

Does the coil have a core? about how many turns on the coil, or size of wire and dimension of the coil. I see multi strands? John Bedini builds in your background?

Ya it has 1 inch core of 98% iron rods. The coil is 8 strand of 20 awg at 165 foot or about 450 turns. I use it to get started because I can make adjustments to the output voltage of the coil. You can take 2 strand of the 8 and wire them in series, that ups the voltage a bit. You don't want slam the charge battery with say 24 volt if its a 12 volt battery, you just raise the impedance of the battery quiker resulting in a lower charge amount overall.
I have built Monopoles. They are another thing all together but kinda the same. See "Simple Motor" in my signature.

What is the diameter of the "bob" (or radius) and the distance from the hinge
to the centerline of the rotor

Its 12 inchs to the center of the pendulum from the shaft. The pendulum is a 60 degree top down triangle.

Your battery charging could be better explained, What's your timing for the
bemf recovery?

I fire the coil 10 degrees passed top dead center. This allow the incoming magnet to create a rise in voltage, then I fire it before the opposite voltage appears. Again see the simple motor in my signature.
But this motor is a little different.....
Its not a BEMF recovery I am after. The motor is basically a step up voltage converter that allows us to utilize the small voltage generated by the magnets on the wheel and the incoming power. The conversion in a solid state is real efficient about 93%. The generated voltage can recover the loss in the step up process, at minimum. When the motor is used at high speed it can produce extra energy while producing torque.

Also I have on the bottom of the coil a large neo magnet. The core of the motor is saturated with a north field. We turn that of by turning the electomagnetic coil on slightly. The rotor magnet then pulls itself in, for the most part. The Emagnet turns off and allow the saturation to push the magnet on the wheel away.
"Magnetic Neutralization" is a technique used by another fellow. I just started playing with it. ITs neat.

I had a hard time explaining that in the video I think the heat was getting to me. Metal shop being an oven most of the day.

Cheers
Matt