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Author Topic: The Ossie motor  (Read 332982 times)

Jimboot

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Re: The Ossie motor
« Reply #375 on: March 08, 2010, 01:24:02 AM »
Hey tooomanymiles that rotor is an old computer fan with the blades replaced by a teflon ring I cut out of a chopping board.
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Jimboot

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Re: The Ossie motor
« Reply #376 on: March 08, 2010, 10:04:57 AM »
New rotor design which I'll upload pix soon for but get a load of this scope shot over 1s. Voltage bounces up and down by 0.5v
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Jimboot

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Re: The Ossie motor
« Reply #377 on: March 14, 2010, 04:43:47 AM »
Ok finally got my meters setup properly so I can read amps & voltage whilst the motor i running. At 531RPM current is 25DCmA @ 6V. WHich is 0.15 watts? Anyway Getting better performance now I can watch when the switch config starts to suck amps.
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Jimboot

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Re: The Ossie motor
« Reply #378 on: March 14, 2010, 08:20:43 AM »
Ok 1500 RPM on 0.12 watts. 6.19v 20DCmA. Tuning the reeds & coils for max RPM as well as low current draw is the key. I'm not using any resistors in the circuit but I am using the bridge rectifier and I have realigned my coils to -+-+. New rotor is using 8 mags aligned Orbo style. will post pix soon.
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Jimboot

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Re: The Ossie motor
« Reply #379 on: March 14, 2010, 10:15:55 AM »
Ok bit more tweaking. Looks like 2DCmA at 6.14volt 920RPM 0.012watts? 12 milliwatts? been running at that for over an 2 hours now. Has bounced up as high as 6.16.
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gyulasun

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Re: The Ossie motor
« Reply #380 on: March 14, 2010, 10:39:01 AM »
Quote from: Jimboot on March 14, 2010, 10:15:55 AM
Ok bit more tweaking. Looks like 2DCmA at 6.14volt 920RPM 0.012watts? 12 milliwatts? been running at that for over an 2 hours now. Has bounced up as high as 6.16.

Hi Jimboot,

Very good! Do you have any magnetic core in the coils? Or you use the coils as electromagnets (either in attract or repel mode) or on Orbo mode you mean first attraction to the cores, then saturating the cores? Sorry I cannot see if there are cores in the coils or not.

rgds, Gyula

EDIT: just realized you wrote Orbo style magnet mounting not mode of operation so ok you have probably no cores in the coils.
« Last Edit: March 14, 2010, 11:12:40 AM by gyulasun »
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Jimboot

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Re: The Ossie motor
« Reply #381 on: March 15, 2010, 12:16:19 AM »
Quote from: gyulasun on March 14, 2010, 10:39:01 AM
Hi Jimboot,

Very good! Do you have any magnetic core in the coils? Or you use the coils as electromagnets (either in attract or repel mode) or on Orbo mode you mean first attraction to the cores, then saturating the cores? Sorry I cannot see if there are cores in the coils or not.

rgds, Gyula

EDIT: just realized you wrote Orbo style magnet mounting not mode of operation so ok you have probably no cores in the coils.
Correct - still an Ossie but my rotor has  4X 2 sets of mags aligned N/S like an orbo but the coils are still air coils
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Rapadura

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Re: The Ossie motor
« Reply #382 on: March 15, 2010, 01:37:52 AM »
Quote from: Jimboot on March 14, 2010, 10:15:55 AM
Ok bit more tweaking. Looks like 2DCmA at 6.14volt 920RPM 0.012watts? 12 milliwatts? been running at that for over an 2 hours now. Has bounced up as high as 6.16.

920 RPM consuming only 12 miliwatts??? For over 2 hours?? Amazing!!!!!

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Rapadura

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Re: The Ossie motor
« Reply #383 on: March 15, 2010, 02:01:02 AM »
At 920 RPM is it generating a little stream of air, as a mini fan? Put there some micro wind "turbines" to transform that stream in electricity.

Is it getting hot?  Use peltiers modules to transform that heat in electricity.

Is it noisy? Use piezo sensors of microphones to transform the sound in electricity.

None of these devices above will slow down the motor.
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Jimboot

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Re: The Ossie motor
« Reply #384 on: March 15, 2010, 02:59:40 AM »
Quote from: Rapadura on March 15, 2010, 02:01:02 AM
At 920 RPM is it generating a little stream of air, as a mini fan? Put there some micro wind "turbines" to transform that stream in electricity.

Is it getting hot?  Use peltiers modules to transform that heat in electricity.

Is it noisy? Use piezo sensors of microphones to transform the sound in electricity.

None of these devices above will slow down the motor.

Xlnt. It has lost voltage over night but it is maintaining around 1000RPM. It generates a breeze but not really focused in any particular direction.  It is a little noisy but not much heat coming off it. I have tried attaching a gen motor a few times but I can't align it well enough to avoid a wobble.
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Jimboot

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Re: The Ossie motor
« Reply #385 on: March 15, 2010, 04:15:16 AM »
I'm also thinking about getting a coil around the rotor itsel, just clear of the mags. The mags I've found in rechargable torches (flashlights) are very weak ceramic ones. The neos should way outperform them. I have some prewound coils out of the torches but I think I need to wind perpendicularly around the rotor somehow for max effect.
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Jimboot

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Re: The Ossie motor
« Reply #386 on: March 15, 2010, 01:52:34 PM »
Ok I have wound a pickup coil but getting nothing from it. What have I done wrong here?
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Jimboot

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Re: The Ossie motor
« Reply #387 on: March 16, 2010, 06:40:32 AM »
I thought lighter gauge wire was what was required for pick up. Obviously not in this config. I'll try a heavier gauge

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gyulasun

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Re: The Ossie motor
« Reply #388 on: March 16, 2010, 11:23:20 AM »
Quote from: Jimboot on March 15, 2010, 01:52:34 PM
Ok I have wound a pickup coil but getting nothing from it. What have I done wrong here?

Hi Jimboot,

I think the pickup coil is too big, compared to its active part that just faces any two magnets. I mean the active part where induction can happen is too short with respect to the total coil's circumference.
A possible solution could be to use one single air cored coil for one single magnet, the diameter of the coils would be about the same as the magnets and the coil diameter coil thickness ratio could be around 3 or 4 (I mean not long coils).
I know this is much mechanical work to fix 8 but much smaller coils (compared to your present big 4 ones) but I think it could induce quasi optimally. (With precise positioning so that all the magnets and all these coils could face each other in the same moment, the coils could be connected in parallel to enhance current loading capability, this reduces generator inner impedance; but this is not a requirement of course.)

Maybe there are smaller audio cross over coils ready made in the shop where you got your present 4 big coils from?

rgds, Gyula
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Jimboot

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Re: The Ossie motor
« Reply #389 on: March 16, 2010, 10:00:48 PM »
@gyulasun Thanks. I thought that may have been the case. I'll go to Jaycar today to see if I can find anything.
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