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Author Topic: Thane Heins Perepiteia Replications  (Read 343509 times)

wattsup

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Re: Thane Heins Perepiteia Replications
« Reply #30 on: June 03, 2009, 10:32:28 PM »
Yes that is true about the eddy currents but there is also another thing happening there that is probably worst then the EC.

As the coil itself gets more and more energized, it will itself produce the classical fields that extend outwards and all around it and onto the rotor holding the magnets.

The magnet will cause EC in the core, and it will also have its normal magnetic attraction to the core, but this is only when the magnet is in the core's immediate vicinity.

The coil however will extend its field further outwards and be effected and/or effect the magnets that are not even close to the core location. So you can generate drag even before the magnet arrives on the core point.

This was one of the main reasons I had recommended to @TH that the cores could use twisted multi-strands of insulated mag wire. Such a coil wind would eliminate (or greatly reduce) the outward fields and hence aid in lowering the total drag on the wheel.

Well, on a lighter note, I was driving on the highway to work yesterday and finally saw the rotor of my dreams. This would be perfect to show that the Perepetia can easily be scaled upwards. Check it out. lol

derricka

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Re: Thane Heins Perepiteia Replications
« Reply #31 on: June 04, 2009, 01:27:56 AM »
Well, on a lighter note, I was driving on the highway to work yesterday and finally saw the rotor of my dreams. This would be perfect to show that the Perepetia can easily be scaled upwards. Check it out. lol

If the bullwheels from your local ski-hill go "missing", I will know who to blame!  ;D

minde4000

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Re: Thane Heins Perepiteia Replications
« Reply #32 on: June 04, 2009, 05:01:52 AM »
Good info Ron thanks. T laminates were in parallel (more or less since ring was curved) and looks like more like by accident because of the way his L shape laminates were build and the way it fit on ring so you can clamp around it and he ever mentioned this important detail. I also heard that tightly wound single strand wire coil is more efficient than litz wire wound coil  ??? High capacistance coil could be build by taking 4-7 strands of awg 30 wire and wind it all together (same way as a single wire) from lets say left to right then quickly returning back left and start another "layer". Coil will not look perfect but will have relatively high capacistance. Magnets and steel plate already home.
  Got email back from magnetic metals. What they say that there is a catalog you can either view online or pdf download and pick one of their "standard" size assortiment or order your laminates with custom measurements wich will be laser cut and according to them costly. 

P.S. Can we keep this topic with pics from replicators only at least? (no offence @wattsup)  ;)

Cheers Minde


 




 

Harmonic33

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Re: Thane Heins Perepiteia Replications
« Reply #33 on: June 04, 2009, 11:47:30 AM »
@ minde4000.

I think you have misread @wattsup's post.

He clearly states this is for his 'Scaled' up Perepiteia.
A SET of rotors of this size (no doubt being shipped from I_ron's workshop) would have cost a bit i reckon. not to mention the magnets!
This shows wattsup's commitment to the replication and I for one am happy to receive ultra-large novelty pictures.

No harm in humor.  ;) 

minde4000

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Re: Thane Heins Perepiteia Replications
« Reply #34 on: June 04, 2009, 05:02:14 PM »
@ minde4000.

I think you have misread @wattsup's post.

He clearly states this is for his 'Scaled' up Perepiteia.
A SET of rotors of this size (no doubt being shipped from I_ron's workshop) would have cost a bit i reckon. not to mention the magnets!
This shows wattsup's commitment to the replication and I for one am happy to receive ultra-large novelty pictures.

No harm in humor.  ;)

Harmonics33..... are you reading what you posting? Wanna chat go elsewhere and exchange as many "novelty" pictures as you all want.

i_ron

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Re: Thane Heins Perepiteia Replications
« Reply #35 on: June 04, 2009, 06:15:04 PM »
Harmonics33..... are you reading what you posting? Wanna chat go elsewhere and exchange as many "novelty" pictures as you all want.

Minde... to me wattsup's rotors brought a laugh. Harmonics'
post pointing out that it was "on topic" brought a further chuckle. Happy to see people have fun. If you recall there was a lot of humor on the old list... to the point of absurdity and even meanness, so the above is well within the guidelines and is encouraged.

In english we have a saying: 'All work and no play makes Jack a dull boy'

Ron

wattsup

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Re: Thane Heins Perepiteia Replications
« Reply #36 on: June 04, 2009, 06:15:33 PM »
@Harmonic33

No I will not be replicating that size any time soon. lol

@derricka

North of Montreal is the Laurentians with ski hills everywhere. Good catch on the wheel type.

@minde4000

It took me some major car manouvering two times to get that photo while driving. I just had to take it. Anyways, it was more in keeping with @TH's sense of humor then the obvious non-technical issues.

But I think what I said in the same post before the photo was more important and something to consider.

baroutologos

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Re: Thane Heins Perepiteia Replications
« Reply #37 on: June 06, 2009, 10:06:53 PM »
Ok, i put together my pulsed motor - perepiteia setup. Pulsed motor failed to fulfil its purpose rightly. It maxxed out 1100 rmp in a six all north face out double stacked magnets. That means some 110 Hz freq.

I used a 75 ohms, 29 Awg coil. I test it more than once in a wide range of rpms ranging from 400-1100.

My double verified findings:

In 400-900 rpm when the coil shorted, it would deccelarate the rotor dramatically. So generator action as expected. In the 1000+ range when sorted it marginally deccelarate the rotor. Just marginally if at all. BUT.

Here is a huge but... when i applied a load instead of the short the deccelaration effect is as dramatic as low rpms. :s
I cannot figure out why that happens. Why sorted does not deccelarate and when under load does deccelarate??????? finding double and triple cheched

It acts as if when i try to extact energy i must pay for that. Jeez..

ANyway, some measuraments...

coil maxes 98 volts ac. When shorted on DMM the meter recorded 0.14 amps flowing it. By using various loads, it can deliver at 1000 some 3-5  watts with decelaration (if loaded but not when shorted)

Those so far.

Suggestions pls.

regards,
Baroutologos


ps: pulse motor was a  waste of effort energy and money. but for the 1100 rpm it uses some 35 watts with the coil unshorted, having an energy recycling in battery of 50-60%. (net consumption below 15 watts)

minde4000

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Re: Thane Heins Perepiteia Replications
« Reply #38 on: June 06, 2009, 11:22:57 PM »
@Baruotologos

Speaking of DC pulsed drive motor. This one is from the days I was trying out fuellesengine motor.  I have single spiral pancake multilayer 64ohm coil driving 12" 2 pole shaft build with six 1"x1"x4" N50 magnets stacked 3 for south and 3 for north poles. I can get it up to 2300 rpm using 740DC @ 30ma unloaded. If I put a 80 amp car alternator with 2:1 gear ratio rpm drops to 1000 and power consumption goes to around 400DC @ 400ma (using jacobs ladder power supply). Of course I had never built proper accurate timed commutator. Just a few copper rings with brass plates as contacts. You might need more driving coils and higher voltage. GL

Minde 


i_ron

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Re: Thane Heins Perepiteia Replications
« Reply #39 on: June 06, 2009, 11:44:25 PM »
Ok, i put together my pulsed motor - perepiteia setup. Pulsed motor failed to fulfil its purpose rightly. It maxxed out 1100 rmp in a six all north face out double stacked magnets. That means some 110 Hz freq.

I used a 75 ohms, 29 Awg coil. I test it more than once in a wide range of rpms ranging from 400-1100.

My double verified findings:

In 400-900 rpm when the coil shorted, it would deccelarate the rotor dramatically. So generator action as expected. In the 1000+ range when sorted it marginally deccelarate the rotor. Just marginally if at all. BUT.

Here is a huge but... when i applied a load instead of the short the deccelaration effect is as dramatic as low rpms. :s
I cannot figure out why that happens. Why sorted does not deccelarate and when under load does deccelarate??????? finding double and triple cheched

It acts as if when i try to extact energy i must pay for that. Jeez..

ANyway, some measuraments...

coil maxes 98 volts ac. When shorted on DMM the meter recorded 0.14 amps flowing it. By using various loads, it can deliver at 1000 some 3-5  watts with decelaration (if loaded but not when shorted)

Those so far.

Suggestions pls.

regards,
Baroutologos


ps: pulse motor was a  waste of effort energy and money. but for the 1100 rpm it uses some 35 watts with the coil unshorted, having an energy recycling in battery of 50-60%. (net consumption below 15 watts)

Baroutologos,

Nothing is ever a waste, it is all part of the learning experience.

So your results don't surprise me, I have seen much the same, both before and this time.

As I have said, it was quite dramatic to see Mr T's ryobi speed up as he reduced the load on it but I think there was more drama than fact.

OK, the first test with the laminated core and a 63 ohm coil... with the circuit open the draw was 15 watts. With the coil shorted the draw was only 4.42 watts.

However, with the Somaloy core the draw was only about 4 watts to start with and shorting the coil increased the draw!

Best run with the 63 ohm coil was 87 watts out for 53 watts draw...in AC, but when I rectified this to DC the actual numbers went down to 90% efficiency.

I plan to test some high ohm coils in the future but I have not come anyway near Mr T's last ou demo with just the high ohm coil doing the accelerating and providing output.

Much happier with the RV setup though so put the guards and wheels back on the ryobi and took it down to the pawn shop this morning... got a few dollars back on my investment, lol

Ron

Pageygeeza

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Re: Thane Heins Perepiteia Replications
« Reply #40 on: June 08, 2009, 08:40:32 PM »
Well, i've been messing with an old motor rotor.  Basically it's the design that's going to be used on my OU device.  Using an 18V Drill battery, (quarter charged)  I'd put an estimation on 1000rpm+.  That was only using one coil, the finished device will contain 4-8 of the same coils, only for more torque than anything else.  My generator stage will create more than enough voltage needed to power the drive coils. Just have to get everything else crafted.  Bob's yer uncle, fanny's yer aunt. :D

minde4000

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Re: Thane Heins Perepiteia Replications
« Reply #41 on: June 08, 2009, 09:26:36 PM »
@Pageygeeza

Few pictures can say a thousand words...  ;)

Pageygeeza

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Re: Thane Heins Perepiteia Replications
« Reply #42 on: June 08, 2009, 09:33:07 PM »
I'll try and get the vid posted on youtube.

Pageygeeza

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Re: Thane Heins Perepiteia Replications
« Reply #43 on: June 08, 2009, 10:02:45 PM »

lancair360

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Re: Thane Heins Perepiteia Replications
« Reply #44 on: June 08, 2009, 10:06:21 PM »
While Thane may not be posting here; he is posting:

http://www.sciscoop.com/thane-heins-perepiteia-explained-away.html

It is good to see he is still moving forward.