Saturation of Y-Shaped Iron with Permanent Magnet

AI Thread Summary
The discussion centers on the saturation of a Y-shaped iron structure when a permanent magnet is applied to one leg. It concludes that the top ends of the Y will not reach saturation, as they will only experience half of the saturation flux density. The participants note that the saturation behavior assumes equal cross-sectional areas for all legs of the Y. Additionally, there is confusion regarding the H-B curve and its relation to cross-sectional area, leading to questions about how to accurately assess saturation in the branches. Overall, the saturation characteristics depend on the configuration and magnetic circuit completeness.
samjesse
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Hi

If we have a Y shape iron and we put a Permanent Magnet N pole at the bottom leg of the Y in such that it will saturate it. would the top ends of the Y also be saturated. what if instead of 2 we have 20 branches where flux can go. what is the saturation will be like at one branch?

thx
 
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No the top ends of the "Y" won't saturate as they will each have only 1/2 of the saturation flux density.

BTW. Since you don't specify then I'll assume that all legs of the Y have the same cross sectional area. Note that typically the "Y" would be connected to some form of yoke to form a complete magnetic circuit.
 
uart said:
No the top ends of the "Y" won't saturate as they will each have only 1/2 of the saturation flux density.

BTW. Since you don't specify then I'll assume that all legs of the Y have the same cross sectional area. Note that typically the "Y" would be connected to some form of yoke to form a complete magnetic circuit.

Then, why the H-B curve does not take the cross sectional area in account?
 
OR should I take the value of B and half it to get the saturation in the the branches?
 

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