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General => General Chat => Topic started by: onemilimeter on February 17, 2011, 11:16:39 pm

Title: Why do we need two toroidal cores?
Post by: onemilimeter on February 17, 2011, 11:16:39 pm
I read somewhere that two or more cores are stacked together to design an inductor or transformer. What is the reason to stack two or more cores?
Title: Re: Why do we need two toroidal cores?
Post by: Time on February 18, 2011, 12:12:22 am
Thats not common.  Might have just been application specific.  Ideally you would want one solid core with no breaks or air gaps for the best Q.
Title: Re: Why do we need two toroidal cores?
Post by: tecman on February 18, 2011, 03:37:57 am
Stacking cores and winding through both increases inductance and power.  Disadvantage is greater losses from leakage inductance, which is the benefit of toroids.

This is usually done as a quick fix.

paul

Title: Re: Why do we need two toroidal cores?
Post by: onemilimeter on February 18, 2011, 09:10:18 am
Stacking cores and winding through both increases inductance and power.  Disadvantage is greater losses from leakage inductance, which is the benefit of toroids.

This is usually done as a quick fix.

One of the parameters given in a toroidal datasheet is AL. When two toroidal cores are stacked together, do you think the effective AL of stacked cores is equivalent to double of the individual core's AL? Thanks.