the MRH Forum

A New Project Journals/Blogs
Reply
MRH Author 5,646 posts Bernd MRH Author 5,646 posts
Bernd

It's not really new but more of an up-date on the eddy current drive system I've been working on. I finally have a good solid test chassis built to be able to test different motors.

Now before the questions come I'll give two links that'll explain how and what eddy current is.

This one will explain what and how eddy currents work.

http://www.kjmagnetics.com/blog.asp?p=eddy-currents

This were I got the idea from and went experimenting on my own. Scroll down to were it says: "There is significant further information on the following pages" and check out the information there.

http://www.intercitymodels.com/ATC01.html

Ok, now to the pictures.

I'm in the process of building a test track and using Micro Marks digital pull meter to check tractive effort on this drive versus a regular straight through drive.

Stay tuned. More to come as progress with this drive.

Bernd

 

New York, Vermont & Northern Rwy. - Route of the Black Diamonds - NCSWIC
Reply 0
Rene Gourley renegourley Prolific poster 1,071 posts
Rene Gourley renegourley

Why a separate flywheel?

Instead of incorporating the flywheel into one half or other of the clutch?

Rene Gourley
Modelling Pembroke, Ontario in Proto:87

Read my MRH blog
Read my Wordpress blog
Reply 0
Southerner New member 23 posts
Southerner

Eddy current drive

Bernd; I'm really interested in and motivated by your efforts to having a go at this, how is the project progressing?

Regards

Doug Smith
Reply 0
Bernd MRH Author 5,646 posts
Bernd

Project progress

Hi Doug,

At present it is at the point of the original pictures post. I've proven to myself what it was and how it works. As with any of my projects I seem to get to a point of getting my ideas working and the project looses steam (pun intended). I do plan on getting back into it. I've accumulated several brass engines that I want to convert to using this drive method. It will include a total motor rebuild so I can use the old open frame motors and and the "eddy current" drive system.

Right now I have two major projects, four HOn30 electric boxcabs and the TP56 switcher engine, both mentioned here on the forum, that I'm working on. Hopefully once I get those done I can return to the eddy current drives. I will be posting that info once I get back at working on that project.

I did write up a bit more on my website. http://kingstonemodelworks.com/ECDtb.html  It may help you. Give it a try and see what you can do. Have any questions you can send a private e-mail by clicking on the "E-mail comments to" on my home page.

Bernd

 

 

New York, Vermont & Northern Rwy. - Route of the Black Diamonds - NCSWIC
Reply 0
jwhitten Frequent poster 555 posts
jwhitten

Link not working

Hi Bernd,

I tried your second link ("http://www.intercitymodels.com/ATC01.html") but it says web page not available.

Where are you getting all your brass stock?

 

Quote:

I've accumulated several brass engines that I want to convert to using this drive method. It will include a total motor rebuild so I can use the old open frame motors and and the "eddy current" drive system.

What is the benefit of doing this way?

John
Modeling the South Pennsylvania Railroad ("The Hilltop Route") in its final days of steam. Heavy patronage by the Pennsy and Norfolk & Western. Coal, sand/gravel/minerals, wood, coke, light industry, finished goods, dairy, mail and light passenger service. Interchanges with the PRR, N&W, WM and Montour.
Reply 0
Geoff Bunza geoffb MRH Author and Moderator 2,512 posts
Geoff Bunza geoffb

Clutch Characteristics

Hi Bernd,

Considering the physics of the clutch, I would expect the slow startup and speed transition characteristics to be different, even compared to DCC with momentum control. Is this what you experience with your model? It's tough to notice in your video.

It would seem the "more slipping" would induce a tighter "clutch grab" but with a very smooth transition. The large flywheel clearly adds to the effect, but I can only imagine that the "feel" of operation would be different.

Have you noticed any such differences? How would you describe it? Changing the strength of the magnets should have an effect too. Are you going to try other variations

As always, great, interesting work!

Best Regards,

Geoff Bunza

 

Geoff Bunza's Blog Index: https://mrhmag.com/blog/geoff-bunza
More Scale Model Animation videos at: https://www.youtube.com/user/DrGeoffB
Home page: http://www.scalemodelanimation.com
Reply 0
Reply