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

# Re: [femm] torque computation

- To: femm@yahoogroups.com
- Subject: Re: [femm] torque computation
- From: David Meeker <dcm3c@earthlink.net>
- Date: Thu, 17 Jan 2002 20:53:40 -0500
- References: <a1o15p+rvvv@eGroups.com> <3C41D77C.720A717C@earthlink.net> <3C47225D.000004.12325@m1d4t2>

    Diego Perez Lara wrote:

    > Dear all, I have some problems calculating torque of an induction
    > motor. When i'm doing a harmonic analisys, femm doesn't take into
    > account B-H curve and i put a linear mu, but i can't achieve a valid
    > result. i'm simulating a quarter of the motor but if i rise up mu,
    > induction is huge. Do you have any clue to solve problem?i'm
    > calculating torque from stress maxwell's tensor across a centered
    > curve round the airgap with a fine mesh in it. Thank you Diego Pérez

    Induction motor designs sometimes have closed slots on the rotor. By
    design, iron over the slot opening is very thin so that it saturates and
    doesn't shunt flux away from paths that would link the rotor bars. To
    analyze this sort of machine, femm a nonlinear time-harmonic formulation
    needs to be implemented in femm, and it currently isn't. In the mean
    time, the best that you can do is to analyze sort of an equivalent
    machine with slot openings that would be sort of the equivalent of the
    machine with the slot openings highly saturated.

    Dave.
    --
    David Meeker
    http://femm.berlios.de/dmeeker

- References:
  - Inductance of two conductors
    - From: "gudul" <philippe.lautier@videotron.ca>
  - Re: [femm] Inductance of two conductors
    - From: David Meeker <dcm3c@earthlink.net>
  - torque computation
    - From: "Diego Perez Lara" <diego.perez.lar@terra.es>

- Prev by Date: RE: [femm] Ansys electromagnetism
- Next by Date: Nonlinear time harmonic formulation
- Previous by thread: Ansys electromagnetism
- Next by thread: Polar coordinate in Lua commands
- Index(es):
  - Date
  - Thread