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# Re: [femm] Hysteresis

- To: <femm@yahoogroups.com>
- Subject: Re: [femm] Hysteresis
- From: "sihang" <stsc_sh@sina.com>
- Date: Tue, 10 Apr 2001 23:27:52 +0800
- References: <NDBBLBMGALJCJOAGCHEBKEONCEAA.mcgee@mcmillan-mcgee.com>

Hello McGee, David and All: It seems great idea. I have the experence in calculating hysteresis losses in electric machine. The way I used is same as you, a time stepping approach. But I still have problem in how to get a satisfying and correct result by interpolating in each group of data. Can you recommand some references, I hardly to find this kind of source here. Thank you. Si hang ----- Original Message ----- From: McGee To: femm@yahoogroups.com Sent: Tuesday, April 10, 2001 10:20 PM Subject: RE: [femm] Hysteresis David Using the approximate approach for modeling hysteresis that you have implemented in your model has worked for me in the past as a "history matching" parameter. As a predictive tool an approach using Preisach's Theory might be useful. I would like to take a stab at implementing hysteresis into your code. It would be tremendously beneficial to me (hysteresis losses in steel pipes) and I am sure others might find it useful. Have you looked at Preisach's Theory. I know several researchers have implemented this approach into FEM code, however I do not know the success of this approach. I used a time stepping approach around the BH loop as H varied with time; in FDTD this was a very direct approach. Any suggestions. Bruce `Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.`

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