Thane Heins Perepiteia Replications

[i_ron]

Lets get some replication starting information going here. Some basic data mining with reference links can go a long way to being succesful.
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Magenets used : Lee Valley one inch magnet
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From I_ron about the last rotor he made for Thane that held 18 magnets and was seen in his last video :
1/4 inch steel plate material
OD: 10.5 inches.
Center line for round magnets: 9.0 inches
18 Magnets

Thats a good idea and a good start HC

If I can just add to that... the Lee Valley magnets are 1" by 1/8th inch. These are sold all over so no need to seek out Lee Valley. These were chosen just for convenience as there is a Lee valley store in most Canadian cities now, Victoria just got a store last month! But they also sell mail order. Now on the #2 rotor Thane went to the stronger grade magnet (at the time of the California demonstration) Whether he kept these I don't know as they couldn't get it over 1000RPM with these magnets at the demo....Thats why you see him starting the ryobi first, letting the R's come up then tilting the mag holder plate into place and doing up the fastener....He went to the new core material at this time also, which helped kill the drag enough to let it run, but as I say... I don't know which magnet strength.

On the rotor... 1/4 inch plate, but machined both sides so the final dimension was from around .200 thou (#1 rotor)to .230 thou final thickness (#2 rotor). Not that it matters a hill of beans... just being precise.

Ron

[minde4000]

@i_ron

Ya they will not line up. I assume E core spacing between fingers should be as closely the same as the distances between curved 3 magnets.
I would like to have both: at least 1  E core and toroidal setup via some kind of easy change-over design or 2-in-1

Minde

[i_ron]

@i_ron

Ya they will not line up. I assume E core spacing between fingers should be as closely the same as the distances between curved 3 magnets.
I would like to have both: at least 1  E core and toroidal setup via some kind of easy change-over design or 2-in-1

Minde

How big is your toroid?

Ron

[minde4000]

Toroid M3-009 grain oriented steel: 

          ID      OD       HT       BUILD     GAPP
  [in]  7.000  11.000  2.000    2.000          0

If anyone could recall where Mr T got his laminates at or another descent place to buy them please pm or reply. Didnt have much luck browsing thru google search   

Regards Minde

[i_ron]

Toroid M3-009 grain oriented steel: 

          ID      OD       HT       BUILD     GAPP
  [in]  7.000  11.000  2.000    2.000          0

If anyone could recall where Mr T got his laminates at or another descent place to buy them please pm or reply. Didnt have much luck browsing thru google search   

Regards Minde

What is done is done... where I was going with that is the size in my mind is rather large. I think for the Hz that these RPM's produce, the core and the toroid should be much smaller.

For an interesting article do see Hydro's link message.

For suppliers see...

http://www.magmet.com/page1.php

Click on products...

So the ultimate is finemet ft3... or Sq50,

"Square 50 - 50% Ni/Fe/ alloy, (grain oriented). It offers the highest squareness ratio (lowest saturated reactance) and very high gain. This material has Bm while cores losses are low enough to consider its use in higher frequency applications than the silicon steels. Applications include bi-stable switching devices, inverter transformers, high performance power magnetic amplifiers, linear current transformers, timing devices, driver transformers, and wherever an extremely square loop material, manufactured to close tolerance, is required."

<http://www.magmet.com/tapewound/square50.php>

or just CRGO steels might be in budget.

Ron

Edit:Core research from correspondence with Nali (Steven)