Ketcher Fan CAD

[Louis Luu]

I want to make a toy version of this....just relaxing today.  Thee are all the available pictures I have.

[Louis Luu]

All lined up so the perspective come out correct.

[Louis Luu]

[Louis Luu]

[Louis Luu]

one piece at a time.  Will smooth it out later. 

[Louis Luu]

I made the iron core hollow with 2mm thickness....less weight and cost effective.  The bell two side piece will be printed in brass.  The iron core for the wire is a bit smaller in diameter than the drawings so wires can be wrapped.

 

[Jim Kovar]

2 hours ago, Louis Luu said:

I made the iron core hollow with 2mm thickness....less weight and cost effective.  The bell two side piece will be printed in brass.  The iron core for the wire is a bit smaller in diameter than the drawings so wires can be wrapped.

Is this going to be
a working model?

Edited April 11, 2023 by Jim Kovar

[Louis Luu]

3 minutes ago, Jim Kovar said:

Is this going to be
a working model?

Hope so.  I got me a demo winding motor to try to figure how to wind motors and hook them up.  I will most likely need help from David Cherry with the machining....not very good at that.

I am aiming for a toy size with the ceiling blade portion around 12 inch in diameter.

 

[Louis Luu]

No cage.

 

[Phillip Scott]

I can't wait to see this creation.

[Louis Luu]

Fixed the curvatures on the end cap.  A bit blending will get rid o the sharp lines.  The end cap is removable.  The two columns are separate and will make winding easier.

 

[Jim Kovar]

Magnetic short circuit...

[Louis Luu]

Cleaner design. 

[Louis Luu]

13 minutes ago, Jim Kovar said:

Magnetic short circuit...

Please explain.  I think I figured out what you are saying....I will fix it tomorrow.

 

Edited April 12, 2023 by Louis Luu

[Jim Kovar]

The green pieces would
have to be nonmagnetic.

Brass most likely would
have been used.

[Louis Luu]

24 minutes ago, Jim Kovar said:

The green pieces would
have to be nonmagnetic.

Brass most likely would
have been used.

Can the endbells be brass? 

The green part I can print in non-magnetic steel.  The rest I can print in magnetic steel.

 

 

[Louis Luu]

I'm guessing the endbells can not be in brass....needs to have magnetic field?

 

[Jim Kovar]

The magnetic circuit of the Ketcher motor is basically like joining two 2-coil bipolar motors together, bottom to bottom.

ldeally, the magnetic flux (the dashed lines) would be confined to field's iron cores, pole pieces and armatures.

And the unavoidable but nessessary small air gaps between the pole faces and armatures.

Edited April 13, 2023 by Jim Kovar

[Jim Kovar]

Now, put that on your
Weber and grill it.  

[Louis Luu]

All fixed.  The two pieces holding the magnet pole will be used as attachment points for the swivel and ceiling attachments and printed in brass. 

Edited April 13, 2023 by Louis Luu

[Anthony Villanacci]

I’m not sure how true to the drawings you are intending to be, but to my eye the original assembly was something like this.

 

Anthony

[Louis Luu]

7 minutes ago, Anthony Villanacci said:

I’m not sure how true to the drawings you are intending to be, but to my eye the original assembly was something like this.

 

Anthony

Makes more sense.  I will fix this.

 

[Anthony Villanacci]

On second thought, I’d wager the spacers were a single cast piece on each end. Makes more sense from a manufacturing point of view. My proportions are off in the drawing but hopefully you get the idea.

I like your idea to recreate this motor from the drawings, I’m excited to see your progress.

Anthony

[Jim Kovar]

2 hours ago, Anthony Villanacci said:

...to my eye the original assembly was something like this.

Anthony, I think you are dead on.

I especially dig and totally agree with your spacer bracket revision.

This would ensure perfect spacing between the cores and make for a more rigid assemblage.

[Jim Kovar]

I also dig your integral one piece cores.

No magnetic joints...
   Less reluctance...
That's a good thing!

Edited April 13, 2023 by Jim Kovar