Eddy Current Brake

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Reported by ahaumer on 5 May 2016 17:31 UTC
Both in Rotational and in Translational a simple model of an eddy current brake would be advantageous for many applications.
It could be simply modeled by Kloss' equation:

tau = 2*tau_nominal/(w/w_nominal + w_nominal/w);

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Migrated-From: https://trac.modelica.org/Modelica/ticket/1993

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Comment by ahaumer on 5 May 2016 17:34 UTC
Tested both in Dymola and OpenModelica.
Implemented by 4f49274

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Comment by dietmarw on 5 May 2016 20:16 UTC
The newly added models contain __Dymola_ annotations that need to be removed.

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Modified by dietmarw on 5 May 2016 20:17 UTC

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Comment by beutlich on 6 May 2016 09:04 UTC
The double wording "the the" also should be corrected.

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Comment by hansolsson on 9 May 2016 13:25 UTC
The variable name w_rel is not ideal since it is w/w_nominal - whereas other models in rotational library use w_rel as difference in rotational speed between flanges.

and form->from in
"However, the the speed w_nominal at which the maximum torque occurs is adapted form reference temperature TRef to the operational temperature."

[modelica-trac-importer]

Comment by ahaumer on 11 May 2016 19:12 UTC
Thanks for correcting the typos - resolved by ac9612d.

Regarding w_rel: You're right, but give me a proposal?
German "Bezogene Grösse" is translated as "related values", as far as I know.
How would you express that this is a per unit value related to w_nominal and avoid mixing this up with difference between two flanges? May be w_rel is not the proper choice for the speed difference, but that naming we can't change for backwards compatibility reasons.

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Comment by ahaumer on 11 May 2016 20:41 UTC
Please could a native English speaker give an advice:
Is "per unit" i.e. w_pu an alternative that most users understand?

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Comment by hansolsson on 12 May 2016 07:15 UTC
What about w_normalized ?

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Comment by ahaumer on 17 May 2016 18:58 UTC
Good idea - I'll take that, thanks Hans.
Resolved by 23effc4

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Comment by beutlich on 21 Jun 2016 20:22 UTC
Please fill the release notes field when closing MSL related tickets.

I updated the milestone since the the new feature is in trunk.