Telcon Strip Wound Toroidal Cores

  • Thread starter Thread starter Fluxtration
  • Start date Start date
  • Tags Tags
    Wound
Click For Summary

Discussion Overview

The discussion revolves around sourcing tape wound toroidal cores for a three-axis vector magnetometer project. Participants inquire about availability in Toronto, specifications for the cores, and the construction and application of these materials in sensor technology.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • Several participants seek information on where to find tape wound toroidal cores for a project, specifically looking for options that allow for quick delivery or local purchase in Toronto.
  • One participant provides a link to specifications for the cores, but notes issues accessing the document, prompting discussion about the reliability of the source.
  • Questions arise regarding the construction of the toroidal cores, with some participants speculating that "strip wound" refers to laminated materials rather than the conductors used.
  • Concerns are raised about interference caused by solid ferrite toroids, with suggestions that tape wound toroids may mitigate these issues.
  • Participants discuss the advantages of laminated construction in minimizing eddy current losses, particularly in low-frequency applications, while questioning its relevance in sensor applications.
  • Some participants suggest contacting the manufacturer directly for quicker access to the required materials, while others highlight potential stock limitations based on the manufacturer's production capabilities.
  • One participant shares their experience with special tape-wound cores, emphasizing the importance of specific dimensions and material properties for high-performance applications.
  • A participant mentions alternative suppliers for magnetics, indicating challenges in sourcing materials on short notice.

Areas of Agreement / Disagreement

The discussion reflects multiple competing views regarding the construction and application of tape wound toroidal cores, as well as uncertainty about sourcing and specifications. No consensus is reached on the best approach to obtain the required materials or the implications of core construction methods.

Contextual Notes

Participants express uncertainty about specific requirements for the cores, including material type, dimensions, and performance characteristics, which may affect sourcing decisions.

Who May Find This Useful

Individuals involved in electronics, magnetics, or sensor technology, particularly those seeking specific materials for projects or applications related to toroidal cores.

Fluxtration
Messages
4
Reaction score
0
Does anyone know where one could find such a material that is either by ordering online where delivery can be within a week to Toronto or a store near/in the city of Toronto?

Much appreciated.
 
Engineering news on Phys.org
Fluxtration said:
Does anyone know where one could find such a material that is either by ordering online where delivery can be within a week to Toronto or a store near/in the city of Toronto?

Much appreciated.

What is the application? What are your target specs?
 
Two tape wound toroids are needed for a three-axis vector magnetometer that will be built within the week.

The target specs:
http://http://www.telcon.co.uk/PDF%20Files/TELCON-CORES.PDF"

Page 5, table 4, 7a

Thank you very much for your time.
 
Last edited by a moderator:
Fluxtration said:
Two tape wound toroids are needed for a three-axis vector magnetometer that will be built within the week.

The target specs:
http://http://www.telcon.co.uk/PDF%20Files/TELCON-CORES.PDF"

Page 5, table 4, 7a

Thank you very much for your time.

The link does not appear to be working for me. Even the base URL is not working for me:

http://www.telcon.co.uk

.
 
Last edited by a moderator:
Update -- I finally got the base URL to work (flaky website?), and then was able to paste in the rest of the URL to get to the PDF. Whew.

But I'm still not very clear on the transformer construction or uses. It looks like the toroids are actually made from laminates? So when they say "strip wound", it is not referring to using strips for the actual conductors wound on the core, but rather that the core is constructed of laminated conductor materials with insulation between the laminations?

What is the advantage of using this construction? I can see it for low-frequency power applications, but in sensor applications? THe PDF mentions the use in Hall Effect sensors (which it sounds like is your intended application), but how is a toroidal transformer used in a Hall Effect sensor?
 
The solid ferrite toroids seems to cause high interference when they are close to each other. The tape wound toroids would be sufficient to suppress the frequency interference. Is there a store location where I can get it within the week?
 
Fluxtration said:
The solid ferrite toroids seems to cause high interference when they are close to each other. The tape wound toroids would be sufficient to suppress the frequency interference. Is there a store location where I can get it within the week?

Toroids should have minimal magnetic cross-coupling, and any electric field cross-coupling can be easily taken care of with grounded shields between the toroids. Laminated construction is generally used to minimize eddy current losses for low-frequency transformers, and I don't see how laminated construction could have anything to do with cross-coupled interference.

If you need some of their product, why not just call this telcon company directly? Seems like the quickest approach.
 
Fluxtration said:
Page 5, table 4, 7a

You didn't say what core material you want; see table 3.
 
berkeman said:
If you need some of their product, why not just call this telcon company directly? Seems like the quickest approach.

The OP wants item 7a from table 5, but at the bottom of table 5, the manufacturer says:

"Cores in the range 0a – 5c are regularly produced, whereas cores in the range 6a – 14b
can be manufactured to order, subject to our normal minimum order quantity."

It's likely they won't have any stock.
 
  • #10
Fluxtration said:
Does anyone know where one could find such a material that is either by ordering online where delivery can be within a week to Toronto or a store near/in the city of Toronto?

Much appreciated.

You might try Dexter:

http://www.dextermag.com/Office-Locations.aspx
 
Last edited by a moderator:
  • #11
You haven't stated specifically what your tape-wound toroid core requirement is. I have used special tape-wound cores in the past. Their special application is for cores with very thin laminations (~1 or 2 mil, for high bandwidth and low eddy current loss) and high permeability (>20,000) tape (special alloys and heat treatment). Give us more information on your dimensions, tape thickness, and permeability.
Bob S
 
  • #12
I have found what I was looking for. Thank you all for the information.
 
  • #13
Fluxtration,

Getting magnetics on short order can be difficult. If you run short, you might try mag-inc. It sounds like your alloy is permalloy or supermalloy.

I've also built core-based fluxgates using flat loop amorphous material from Allied Signal. You can get that material from Eastern Components magnetics.

- Mike
 

Similar threads

Electrical length of wire wound on magnetic core?
  • · Replies 8 ·
Replies
8
Views
2K
E-Bike/Scooter Li Battery Fires
  • · Replies 26 ·
Replies
26
Views
4K
Winding a toroid inductor, is this calculation correct?
  • · Replies 4 ·
Replies
4
Views
3K
Conductor with high electron mobility (mean free path)
  • · Replies 1 ·
Replies
1
Views
767
Guiding Magnetic Fields in Solenoid Coils: Design and Material Considerations
  • · Replies 22 ·
Replies
22
Views
4K
Can a Community College Lab Simulate Real Lightning Conditions?
  • · Replies 3 ·
Replies
3
Views
2K
Wind Toroidal Cores - Tips for 20 Gauge Magnet Wire
  • · Replies 63 ·
3
Replies
63
Views
120K
Graduate Inductance of Parallel Coils on an uncut toroid magnetic core
  • · Replies 13 ·
Replies
13
Views
3K
Help needed with Polarisation (Rotated Waveplates)
  • · Replies 8 ·
Replies
8
Views
4K
Question about Non-Linear LED Loading
  • · Replies 23 ·
Replies
23
Views
4K