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# [FEMM] Time stepping method and FEMM

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- Subject: [FEMM] Time stepping method and FEMM
- From: <PikoH@centrum.sk>
- Date: Fri, 05 Dec 2003 15:41:59 +0100
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    Hi all
    I have been using FEMM for a few years now. Many thanks to Dave,
    excellent program.
    I have question on using time stepping method together with FEMM
    to evaluate asynchronous operation of reluctance synchronous
    motor (RSM) with transversally laminated rotor (see [1],[2],[3]).
    I used the FEMM together with lua-scrip to design of geometry of
    RSM. I calculated torque, profile of inductance in both axes,
    iron losses and the coincidence with measurements on prototype is
    very good.
    Now I would like to investigate the profile of asynchronous
    torque and stator currents on asynchronous operation of RSM but I
    understand how to use the time stepping method with FEMM. Is it
    possible?
    Could anybody help me with this problem.
    Thank you very much.
    Peter

    [1] 	Design refinement of synchronous reluctance motors
    through finite-element analysis Vagati, A.; Canova, A.; Chiampi,
    M.; Pastorelli, M.; Repetto, M.; Industry Applications, IEEE
    Transactions on , Volume: 36 Issue: 4 , July-Aug. 2000 Page(s):
    1094 1102
    [2]	Reluctance synchronous motor asynchronous operation
    Ferraz, C.A.M.D.; de Souza, C.R.; Electrical and Computer
    Engineering, 2002. IEEE CCECE 2002. Canadian Conference on ,
    Volume: 1 , 12-15 May 2002 Page(s): 195 -200 vol.1
    [3]	Computation of harmonic stray losses of induction motors
    using adaptive time stepping finite element method together with
    externally coupled circuits Ho, S.L.; Fu, W.N.; Electrical
    Machines and Drives, 1995. Seventh International Conference on
    (Conf. Publ. No. 412) , 11-13 Sep 1995 Page(s): 93 97

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