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Can I investigate magnetic flux phase?

Posted 12 avr. 2018, 13:50 UTC−4 Low-Frequency Electromagnetics Version 5.2a 4 Replies

Peter H
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After poking around the software I wanted to ask a quick question:

Is there a way I can look at the phase of an alternating magnetic flux? I am thinking about induction motors and shaded poles so I'd like to model a typical single-coil inductor where a phase shift is implemented in the magnetic flux across the air gap. Any quick pointers would be very appreciated!

-Peter

4 Replies Last Post 12 avr. 2018, 17:52 UTC−4
Edgar J. Kaiser Certified Consultant
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Posted: 7 years ago 12 avr. 2018, 15:35 UTC−4

Peter, Sure you can. The magnetic flux density components are complex quantities.

Cheers Edgar

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Peter, Sure you can. The magnetic flux density components are complex quantities. Cheers Edgar
Peter H
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Posted: 7 years ago 12 avr. 2018, 17:06 UTC−4
Updated: 7 years ago 12 avr. 2018, 17:35 UTC−4

Ok, based on your comment I'm seeing that I need to activate the "Split complex variables in real and imaginary parts" check box in the "Compile Equations: Stationary" and then plot expressions like real(mf.normB) and imag(mf.normB) to access the complex values, etc. to get explicit phase information. Can you confirm this is the correct approach?

CORRECTION: I suppose I'll want to plot real(mf.Bx) imag(mf.Bx) etc.

Thank you for your advice.

-Peter

Ok, based on your comment I'm seeing that I need to activate the "Split complex variables in real and imaginary parts" check box in the "Compile Equations: Stationary" and then plot expressions like real(mf.normB) and imag(mf.normB) to access the complex values, etc. to get explicit phase information. Can you confirm this is the correct approach? CORRECTION: I suppose I'll want to plot real(mf.Bx) imag(mf.Bx) etc. Thank you for your advice. -Peter
Edgar J. Kaiser Certified Consultant
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Posted: 7 years ago 12 avr. 2018, 17:47 UTC−4

You don't need to split the complex variables. The real() and imag() operator extracts the components.

-------------------
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
You don't need to split the complex variables. The real() and imag() operator extracts the components.
Peter H
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Posted: 7 years ago 12 avr. 2018, 17:52 UTC−4

Oh ok. Thanks! Applying this to an application model now and getting somewhere...

I appreciate it.

Oh ok. Thanks! Applying this to an application model now and getting somewhere... I appreciate it.

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