# MAGNETIC HYSTERESIS LOSS AS RESISTANCE

Discussion in 'Physics' started by b.shahvir, Feb 22, 2009.

1. ### b.shahvir Thread Starter Active Member

Jan 6, 2009
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0
Hi Guys,

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

2. ### beenthere Retired Moderator

Apr 20, 2004
15,815
283
Here is our Ebook chapter on AC effects - http://www.allaboutcircuits.com/vol_2/chpt_9/8.html.

The change from one state of magnetization to the other requires some work being done to shift all those domains' orientations. The equivalent loss could be simulated by a resistance of appropriate value.

3. ### b.shahvir Thread Starter Active Member

Jan 6, 2009
444
0
Thanx, but its very difficult to visualize a magnetic effect into an electrical one & hence the query! can you guide me to a link or literature elaborating on the Physics of Hysteresis Loss? will be very much grateful

Apr 20, 2004
15,815
283
5. ### b.shahvir Thread Starter Active Member

Jan 6, 2009
444
0
Thanx very much, i will look it up & see what i can infer

6. ### b.shahvir Thread Starter Active Member

Jan 6, 2009
444
0
Even though the physics of Hysteresis Loss has been explained appropriately in the link, I wish to dwell deeper into the phenomenon to get to the source of my doubt. In spite of the relevant theory, 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