[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

# Re: [femm] Re: Current

- To: femm@yahoogroups.com
- Subject: Re: [femm] Re: Current
- From: Keith Gregory <k.gregory@lboro.ac.uk>
- Date: Tue, 23 Jul 2002 08:10:31 +0100
- In-reply-to: <3D3CA360.2020409@ieee.org>
- References: <ahgh7h+q70o@eGroups.com>

At 20:29 22/07/2002 -0400, you wrote:

> brian_hawes wrote:

> > `Keith,
> > Thanks for the reply. My problem is thus: I have a simple simulation
> > of a single curent carrying ring. I have defined the current density
> > in the model for the copper. If I simulate at very low frequency,
> > such that skin and proximity effects are negligable, then the total
> > current, found by using the block integral feature in FemView, is
> > what I would expect - J x Area. Now, if I increase the frequency such
> > that skin and proximity effects occurr, then the total current,
> > measured with FemView appears to fall. I would expect, as you say,
> > that the total current would remain constant, and just be
> > redistributed.
> > Brian`

> If you define a "source current density," this is defines the current that you would get at 0 Hz. At nonzero frequencies, in conductive regions, some of the current gets bucked by inductance.

I think I had begun to work this out looking at a similar situation to that Brian has been using. The current density seems to act in a manner similar to what would occur if a constant voltage was applied to the region rather than a constant current. Am I on the right track or is it not this simple?
Keith.

- Follow-Ups:
  - Re: [femm] Re: Current
    - From: David Meeker <dmeeker@ieee.org>
  - Force using LUA
    - From: Giancarlo Cordeiro da Costa <gian@coc.ufrj.br>

- References:
  - Re: Current
    - From: "brian_hawes" <b.hawes1@physics.ox.ac.uk>
  - Re: [femm] Re: Current
    - From: David Meeker <dmeeker@ieee.org>

- Prev by Date: Re: [femm] Re: Current
- Next by Date: Re: [femm] Re: Current
- Previous by thread: Re: [femm] Re: Current
- Next by thread: Re: [femm] Re: Current
- Index(es):
  - Date
  - Thread