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Author Topic: Self accelerating reed switch magnet spinner.  (Read 221081 times)

Offline Magluvin

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Re: Self accelerating reed switch magnet spinner.
« Reply #105 on: October 08, 2013, 03:04:42 AM »
I had to take it apart to reglue a magnet, so here's the underside view of the rotor, showing the assortment of magnets. It's all I had available when I made the original Bedini SMG that I am recycling!

Hey T

What are the black parts with the silverish magnets in the lid? 

Mags

Free Energy | searching for free energy and discussing free energy

Re: Self accelerating reed switch magnet spinner.
« Reply #105 on: October 08, 2013, 03:04:42 AM »

Offline TinselKoala

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Re: Self accelerating reed switch magnet spinner.
« Reply #106 on: October 08, 2013, 03:07:52 AM »
@TK,


      This circuit looks like it may spring to life by lightning strike. Watch it now! Maybe your dog can help lick clean what's left of the peanut butter from inside the lid.

The white-out is getting so thick on the page I am afraid to try to close the notebook!

Offline TinselKoala

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Re: Self accelerating reed switch magnet spinner.
« Reply #107 on: October 08, 2013, 03:12:06 AM »
Hey T

What are the black parts with the silverish magnets in the lid? 

Mags

There are four black ceramic magnets: two round ones and two "bars" polled on the long faces. Then I stuck a little NdBFe on top of each ceramic magnet.

This was the only way I could get the old Bedini SGM to work, with the magnets I had on hand when I built it. I do have another set of matching magnets now that I could put in there... and someone gave me a set of Steorn superstrong concentric ring magnets for bearings .... but the pivot bearing is already better than a ball bearing would be.... so work continues.

Free Energy | searching for free energy and discussing free energy

Re: Self accelerating reed switch magnet spinner.
« Reply #107 on: October 08, 2013, 03:12:06 AM »
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Offline Magluvin

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Re: Self accelerating reed switch magnet spinner.
« Reply #108 on: October 08, 2013, 03:31:29 AM »
There are four black ceramic magnets: two round ones and two "bars" polled on the long faces. Then I stuck a little NdBFe on top of each ceramic magnet.

This was the only way I could get the old Bedini SGM to work, with the magnets I had on hand when I built it. I do have another set of matching magnets now that I could put in there... and someone gave me a set of Steorn superstrong concentric ring magnets for bearings .... but the pivot bearing is already better than a ball bearing would be.... so work continues.

Seems to work fine mismatched. ;) Just wondered.  All of this could be done much the same with an arduino. Have you thought about it?  on/off timing, timing adjustment, led strobing, etc. Im working on an arduino setup using a joystick for manual fine and course tuning. Makes adjustments on the fly while watching meters n scopes. The duino will beep high n low for course and fine digit changes so without looking I know it made the change. Fun stuff. ;D

Mags


Offline TinselKoala

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Re: Self accelerating reed switch magnet spinner.
« Reply #109 on: October 08, 2013, 04:15:47 AM »
Well, this is exciting! I've had my first component failure! Any guesses as to which one?

As I switched the "PTO Mode" switch the thing died. The motor stopped running, the coil was constantly energized, mosfet Drain signal at zero. Blown mosfet?

Nope... the 10 nF poly film cap between Drain and Source failed shorted. I used a Sprague 80 volt unit.... surprised it lasted this long. Replaced with a 400 V unit from an old TV chassis.... all is once again copacetic, motor runs great once again! Mosfet is fine.


@Mags:
Yep, I think the hot setup would be to use the Arduino to provide the reference voltage for the comparator driver! The rest of the Arduino could monitor stuff, and you could even put in a feedback loop to do the small changes in duty cycle and timing required for acceleration/load rather than just free running max RPM.

But seriously... this driver, including the power mosfet, has less than ten dollars worth of parts!
TL082,    0.71 (DigiKey)
4017,      0.52      ''
555,        0.43      ''
IRFP360, 3.79      ''
NE-2E      0.32 (Mouser)
10-turn trimpot 2.49 (Mouser)
some scavenged parts from old TVs (cap, relay coil)  free


Free Energy | searching for free energy and discussing free energy

Re: Self accelerating reed switch magnet spinner.
« Reply #109 on: October 08, 2013, 04:15:47 AM »
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Offline Magluvin

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Re: Self accelerating reed switch magnet spinner.
« Reply #110 on: October 08, 2013, 04:32:18 AM »


But seriously... this driver, including the power mosfet, has less than ten dollars worth of parts!
TL082,    0.71 (DigiKey)
4017,      0.52      ''
555,        0.43      ''
IRFP360, 3.79      ''
NE-2E      0.32 (Mouser)
10-turn trimpot 2.49 (Mouser)
some scavenged parts from old TVs (cap, relay coil)  free

Mini USB Nano   $6.98 free shipping.   Need to solder the headers.  For a few bucks more assembled. ;)   

http://www.ebay.com/itm/Mini-USB-Nano-V3-0-ATmega328-5V-Micro-controller-Board-Arduino-compatible-/181233866050?pt=LH_DefaultDomain_0&hash=item2a32615542

Not that bad is it?

Mags

Offline TinselKoala

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Re: Self accelerating reed switch magnet spinner.
« Reply #111 on: October 08, 2013, 06:04:30 AM »
Did you remember to add the cost of the computer you need to program the Nano? What about some kind of display?

Free Energy | searching for free energy and discussing free energy

Re: Self accelerating reed switch magnet spinner.
« Reply #111 on: October 08, 2013, 06:04:30 AM »
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Offline Magluvin

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Re: Self accelerating reed switch magnet spinner.
« Reply #112 on: October 08, 2013, 06:35:42 AM »
Did you remember to add the cost of the computer you need to program the Nano? What about some kind of display?


Lol I dont think a computer is that big of an issue for most readers. ;) If they have a computer, then there is serial output to the monitor to see variable changes. Once the thing is programed to do what needs to be done, no pc needed. Then it is back to meters, scopes, etc. to show results once optimized.

Mags

Offline Magluvin

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Re: Self accelerating reed switch magnet spinner.
« Reply #113 on: October 08, 2013, 06:41:17 AM »
By the way. Not asking you to build anything. Ill be showing some stuff with duino's soon. ;D

Mags

Free Energy | searching for free energy and discussing free energy

Re: Self accelerating reed switch magnet spinner.
« Reply #113 on: October 08, 2013, 06:41:17 AM »
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Offline synchro1

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Re: Self accelerating reed switch magnet spinner.
« Reply #114 on: October 08, 2013, 05:10:03 PM »
@Magluvin,


          Practically everyone one has at least two working computers and one in the garage. You need a computer to participate on this web site. Don't grow discouraged. I know why you're picking flack up, and I believe it's undeserved. Keep on truckin!












 

Offline TinselKoala

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Re: Self accelerating reed switch magnet spinner.
« Reply #115 on: October 08, 2013, 06:17:12 PM »
Hey, I'm no stranger to Arduinos, you know!




Free Energy | searching for free energy and discussing free energy

Re: Self accelerating reed switch magnet spinner.
« Reply #115 on: October 08, 2013, 06:17:12 PM »
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Offline MileHigh

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Re: Self accelerating reed switch magnet spinner.
« Reply #116 on: October 09, 2013, 01:26:32 AM »
TK:

Need some new project ideas?

http://www.youtube.com/watch?v=VlOxlSOr3_M

Offline TinselKoala

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Re: Self accelerating reed switch magnet spinner.
« Reply #117 on: October 09, 2013, 04:16:22 AM »
Grrl need to lay off them triple spresso shots and stick to decaf lattes for a while.

Offline MileHigh

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Re: Self accelerating reed switch magnet spinner.
« Reply #118 on: October 09, 2013, 07:54:09 AM »
TK:

I was racking my brain trying to think of what could be interesting and different to add to the mix as a deluxe bonus at the end of this endeavour.  So I finally came up with the following:

Let's look at some initial conditions:

If anybody is going to buy op-amps from DigiKey they are so cheap that chances are they are going to buy somewhere between 10 and 25 pieces.  Note the TL082 is a dual op-amp so that's a lot of op-amps.  Most experimenters probably have at least two or more cheapie digital multimeters.  Most pulse motor experimenters will probably have an optical tachometer.   Most experimenters will probably have a bunch of 9-volt batteries laying around.  Most pulse motors probably consume 10 watts or less of input power and output four watts or less into a charging battery.  An operational amplifier is a device that can perform mathematical operations on voltages like additions, subtractions and multiplications.

So, put that all into a blender and what do you get?  A word salad?  Nope, this is a magical "negative entropy" blender.

The goal would be to convert your cheapo multimeters into real-time watt meters using a few of the operational amplifiers at your disposal.  This is doable within certain constraints that are met by pulse motors.

So you can think of a scene like this:  As you tweak your MileHigh pulse motor playing with the pulse duty cycle (a.k.a. dwell angle or conduction angle) and adjusting the pulse start time (or you could call it the pulse start angle) relative to TDC with your moveable sense coil,  one multimeter is displaying the input power in watts in real time and another multimeter is displaying the output power in watts in real time.  So you monitor your live input and output power levels while you spot check your RPM with your optical tach while you tweak away.  I figure that might be exciting stuff for an avid pulse motor builder.

Note this will work with any kind of pulse motor, so it's a useable concept that can be applied to all sorts of other builds.

Anyway, I know you did a rebuild and you stated you will be doing some new clips and all that.  Then you may find yourself doing other things.  So perhaps this idea could be fleshed out when you are done.  You might be tempted to build it yourself or at least it can be discussed in enough detail so that a determined pulse motor builder could bootstrap him or herself and do the circuit to convert their cheapo multimeters into watt meters.

MileHigh

Offline conradelektro

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Re: Self accelerating reed switch magnet spinner.
« Reply #119 on: October 09, 2013, 08:31:17 AM »

The goal would be to convert your cheapo multimeters into real-time watt meters using a few of the operational amplifiers at your disposal.  This is doable within certain constraints that are met by pulse motors.

So you can think of a scene like this:  As you tweak your MileHigh pulse motor playing with the pulse duty cycle (a.k.a. dwell angle or conduction angle) and adjusting the pulse start time (or you could call it the pulse start angle) relative to TDC with your moveable sense coil,  one multimeter is displaying the input power in watts in real time and another multimeter is displaying the output power in watts in real time.  So you monitor your live input and output power levels while you spot check your RPM with your optical tach while you tweak away.  I figure that might be exciting stuff for an avid pulse motor builder.

Note this will work with any kind of pulse motor, so it's a useable concept that can be applied to all sorts of other builds.

MileHigh

Measuring input power with operational amplifiers: the circuit has to be calibrated, which needs at least a good Voltmeter. The input power is fed as pulses, which are difficult to measure without a scope (integration of the Voltage curve over a shunt).

Measuring output of a pulse motor: this should be the mechanical output (torque) which needs some sort of Prony Brake http://en.wikipedia.org/wiki/De_Prony_brake and good scales. To build good scales with operational amplifiers is a major task. The Prony brake looks easy but is mechanically tricky (the braking belt or braking clamp heats up fast).

http://en.wikipedia.org/wiki/Torque_sensor would need a torque sensor.

How are the measurements displayed?

The reason why we see hardly any consistent measurements from pulse motor experimenters is the difficulty of good measurements.

Greetings, Conrad

 

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