×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Magnets as a heat source?

Magnets as a heat source?

Magnets as a heat source?

(OP)
Neodymium permanent magnets are new to me being in the hvac field
I have watched several utube videos on Hugh Piggots diy wind generators
Can anyone with neo magnet expertise tell me if magnets spinning
against magnets similar to Hugh Piggots axial flux wind generators
could be used to generate heat without electrical windings and just
create heat
I know the are maximum temperatures the magnets will allow before
losing their field strength
I don't know if this could be referred to as an eddy current
heater with just magnets passing other magnets
and I don't know the max useful air temp you could extract
to use a heat source for a furnace
Are there any research projects already being done or links available
where I could learn more about heating with magnets
Thanks in advance
John Roberson

RE: Magnets as a heat source?

Magnets against magnets wouldn't produce much heat. There would be cycling attraction/repulsion.  

If the moving magnetic field cuts a stationery conductor like a block of aluminium there will be eddy currents in the block and this will generate heat in the block.   This is the principal of the eddy-current brake.  This generates heat which has to be taken away by cooling system, usually fins.

I never heard of this principal being uses as a source of heat.  I am sure it is possible.   For very high temperatures the magnetic field has to change rapidly and must be concentrated.   If a changing field similar to an induction heater were achieved very high temperatures would be possible.  

As to the efficiency of such a system I have no idea.
 

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources