Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by JerryRoy

  1. JerryRoy

    Qestion for Edstainless

    The magnets I am trying to deal with were made in England and used in Lucas magnetos. I was told that the Alnico used in the late 50's was Alnico 5, but I really don't know. It was also stated in the Lucas manual that if the armature, which housed the magnets, was removed from the housing, that...
  2. JerryRoy

    Qestion for Edstainless

    Fun stuff! What was the support framework made out of? To withstand 1500f, it would have to be steel, but that would interfere with the field. You mentioned that the field did not cross the laminations. Yet if you have a coil around a square core, the portion of the coil that is facing the faces...
  3. JerryRoy

    Qestion for Edstainless

    Wowser! That must do some big Alnico pieces. I notice that the ends of the poles are beveled at what looks like a 45 deg angle. Is that to focus the flux down to a smaller area, thereby increasing it's density? I was under the impression that the max flux density that you could get out of steel...
  4. JerryRoy

    Qestion for Edstainless

    Good info, Ed You say that the core was stacked. And you put 10,000 amps through it! That will dim the lights. What voltage were you working with? Does the lamination of the core impair the flux travel through it? Our core is the laminated core from a transformer, used in a DC magnet. (I...
  5. JerryRoy

    Qestion for Edstainless

    Thanks for the reply, Ed, I set the air shutter wide open on the burner, and didn't see any yellow in the flame, so I'll hope that the flame was Oxy rich. I'm at 5280 ft elevation, so we don't have a lot of extra Oxy.[ponder] The material is hot rolled, and I am going to surface grind it so that...
  6. JerryRoy

    Qestion for Edstainless

    Howdy Ed, I was researching the process for anealing 1018, and came upon your post of 25 Sept 09. 25 Sep 09 8:43 If this is a DC application who would care about the perm? Saturation is all that matters. Any low carbon steel grade with less than 0.2%C that has been annealed at 1400-1475F...
  7. JerryRoy

    Core material question

    Thanks, that is what I thought. I'll make sure that the flux path is applied to the sdges of the laminations. JR
  8. JerryRoy

    Core material question

    Yes, after I posted that I realized that it didn't make a lot of sense. What I was wondering was if the pole pieces that I made out of laminated iron would be more efficient with the laminations in the same plane as the core laminations, or would there be a reduction in flux transfer between the...
  9. JerryRoy

    Core material question

    While researching electromagnet construction, I tried to find information about the feasibility of using laminated core (transformer core) as the core for a DC magnet. The only thing I could find was an opinion that the laminations would not be as efficient as a solid core due to the air gaps...
  10. JerryRoy

    Magnetizer questions

    Thanks for the addendum, Ed. Originally, I had thought to use a DC welder as the power source, But my accomplice had 2 Farad cap bank at a couple of hundred volts, and he wanted to use that. My thought was that the foot pedal on the welder could be used to ramp up the current until it stopped...
  11. JerryRoy

    Magnetizer questions

    Thanks for the input, guys. Looks like two ground surfaces cheek by jowl is the best way to mate the two core pieces. And that leaves out the magnetic paste, so that question is moot. This is a one shot DC power application from a capacitor bank, so there will be no power up until the next mag...
  12. JerryRoy

    Magnetizer questions

    Thanks for the warning Ed, No, this is the first go round. Doesn't seem to be a lot of Web information that I can use, so that explains my presence here. I am looking for some big diodes to handle the reactance. I suppose what I'm looking for is a BIG MOV.[ponder] Another question I have is, in...
  13. JerryRoy

    Magnetizer questions

    Howdy, new guy here, I tried posting this earlier today, but it didn't seem tp go through, so I'll try again. We are re-purposing an old transformer to use as a magneto magnetizer. We started with a transformer that has a two piece armature. The bottom was one piece, in the shape of an I, 1.75...
See more

Part and Inventory Search

Back
Top