Why Is Magnetic Hysteresis Loss Represented as Resistance in Equivalent Circuits

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Discussion Overview

The discussion centers on the representation of magnetic hysteresis loss as resistance in electrical equivalent circuits. Participants explore the underlying physics of hysteresis loss and its implications in machines like transformers and motors, focusing on the conceptual challenges of relating magnetic phenomena to electrical parameters.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Shahvir expresses confusion about why magnetic hysteresis loss is represented as resistance in equivalent circuits and seeks clarification on this concept.
  • Shahvir notes that while the physics of hysteresis loss has been explained, visualizing a magnetic phenomenon as an electrical parameter remains challenging.
  • Shahvir questions whether the additional losses in machines are due to the delay caused by magnetic dipole friction in the core, which affects the buildup of the magnetic field.
  • Some participants suggest looking for resources online, including Wikipedia, but Shahvir indicates that existing discussions do not adequately address the deeper physics of hysteresis loss.

Areas of Agreement / Disagreement

The discussion does not reach a consensus, as participants express varying levels of understanding and seek deeper insights into the topic. There are no clear agreements on the explanations or models related to magnetic hysteresis loss.

Contextual Notes

Participants mention the abstract nature of relating magnetic phenomena to electrical parameters, indicating a potential gap in understanding the underlying mechanisms of hysteresis loss.

b.shahvir
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Hi Guys, :smile:

Can someone please explain to me the logic behind the representation of 'Magnetic Hysteresis loss' as a resistance in electrical equivalent circuits?... will be extremely grateful.

Thanks & Regards,
Shahvir
 
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b.shahvir said:
Hi Guys, :smile:

Can someone please explain to me the logic behind the representation of 'Magnetic Hysteresis loss' as a resistance in electrical equivalent circuits?... will be extremely grateful.

Thanks & Regards,
Shahvir

Welcome to the PF. What can you tell us about your question? What have you learned so far about it? What web resources have you been using to investigate the question?
 
I have studied some info on this subject on the net. Even though the physics of Hysteresis Loss has been explained appropriately, I wish to dwell deeper into the phenomenon to get to the source of my doubt. In spite of the relevant theories, it becomes difficult to visualize a magnetic phenomenon into an electrical parameter as mentioned by me earlier. When we talk of energy expended by the power source to ‘pump up’ the magnetic field in the core, sounds a bit abstract!

I want to understand what phenomenon in the magnetic hysteresis causes the machine (Xmer or motor) to suck an additional losses (wattful) current from the power source.

Is it a result of the delay caused by the magnetic dipole friction in the magnetic core... which prevents the magnetic field from building up quickly? I would be grateful if someone could elaborate on this part. Thanx.

Kind Regards,
Shahvir
 
Someone please reply to this query too! :frown: (or is this query in the wrong section of the forum :confused:)

Kind Regards,
Shahvir
 
berkeman said:
I googled "magnetic hysteresis loss" and got lots of hits

Thanx for considering my request. The first thing i did was to browse the net like you did, but the discussions do not delve deep into he physics of Hysteresis loss! (they are general explanations). Still i'll give it a go.

berkeman said:
(including your post of the questionn on another forum, also without much of a reply). There seem to be some pretty good hits on the list:

OOPS! :biggrin:
 
Last edited:

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