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Introduction of air gap, etc
2022-07-05 07:59:00 【feiyingzaishi】
Reference link
https://mp.weixin.qq.com/s/gEBdThoI4OS2otzSiKHv_w
Air gap
- Definition
The air gap of the magnetic core refers to that part of the magnetic furnace is composed of air , It is called air gap , Air gap for short
- effect
2.1) Reduce permeability
2.2) Increase the saturation current Isat
2.3) Increase the ability to store energy
2.4) Reduce remanence Br
2.5) Design of air gap size : Need to meet the current size ; The volume should not be too large ;
The magnetic core of the transformer is to transmit magnetic energy ;
Inductance stores magnetic energy
Magnetic field energy density :E=0.5*B*H;
The magnetic core has high permeability ; Low air gap permeability , The magnetic field has great energy
Magnetic field energy is mainly stored in the air gap , The magnetic core is just a magnetic flux path , So inductance needs air gap ;
The higher the permeability of the magnetic core , The air gap reduces the effective permeability more obviously ;
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