High-energy density laminated inductor and inductor unit
A high-energy density, stacked inductance technology, applied in transformer/inductor cores, preventing/reducing unwanted electrical/magnetic effects, etc., can solve the problems of easy saturation of magnetic cores, no application examples, and high process requirements , to achieve the effect of improving power density, simple manufacturing process and simple winding
Pending Publication Date: 2021-12-03
南京能利芯科技有限公司
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Problems solved by technology
It can be seen that increasing the number of wire winding turns N means increasing the on-resistance and manufacturing difficulty, and reducing the length lc of the magnetic core means reducing the window area, so neither of them is desirable
[0004] However, because there is no central magnetic column in PCB inductors, there is a huge air gap length lg, which makes the distribution of the magnetic circuit extremely uneven, and the magnetic core is easily saturated, so there is no application example in high current occasions.
In addition, since it needs to be made on high-permeability materials (magnetic cores), the process requirements are high and the production is difficult
Method used
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Embodiment Construction
[0039] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0040] Such as Figure 1-2 As shown, an inductance unit embodiment 1 includes two outer layer magnets with a thickness of less than 1 mm made of a magnetic material with a relative magnetic permeability greater than 50 arranged side by side, and a thickness is provided in the middle between the two outer layer magnets. Conductive metal strip less than 1mm, except for the conductive metal strip, between the two outer magnets is air or an insulating material with a relative magnetic permeability not greater than 10; the magnetomotive force F and magnetic flux at any point between the two outer magnets Φ, magnetic field strength B satisfy the following equation:
[0041]
[0042] Among them, the unit of magnetomotive force F is AT, the unit of magnetic flux Φ is Wb; the unit of magnetic field strength B is T; The axis is the lateral distance...
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Abstract
The invention discloses a high-energy-density laminated inductor comprising two outer-layer magnets which are arranged in parallel, and a plurality of middle magnetic cores which are arranged in parallel and have the surface area equal to that of the outer-layer magnets are arranged between the two outer-layer magnets. At least one conductive metal belt is arranged between the adjacent middle magnetic cores, between the outer-layer magnet and the uppermost middle magnetic core and between the lowermost middle magnetic core and the outer-layer magnet, and when multiple conductive metal belts is multiple, the conductive metal belts are mutually insulated; air or insulating materials with the relative permeability not larger than 10 are arranged between the adjacent middle magnetic cores and between the outer-layer magnet and the middle magnetic cores except the conductive metal belts. The invention further discloses an inductor unit with a simple structure, the inductor unit comprises two outer-layer magnets which are arranged in parallel, at least one conductive metal belt is arranged between the two outer-layer magnets, when the multiple conductive metal belts are arranged, the conductive metal belts are mutually insulated, and air or an insulating material with the relative permeability not larger than 10 is arranged between the two outer-layer magnets except the conductive metal belts.
Description
technical field [0001] The invention relates to a high energy density laminated inductor and an inductor unit. Background technique [0002] For standard UI inductors, changes in the number of turns N of the wire, the area Ac, and the relative permeability u cannot affect the limit of energy storage density. [0003] The way to affect the energy density of the inductor is to use a higher saturation material (such as nanocrystalline), a larger air gap, or a better process (such as using a Planar inductor to reduce the window area); but increasing the density requires increasing the air gap length lg, Increasing the inductance requires increasing the area Ac, however increasing the area Ac makes the inductor height higher, so the inductor is usually the tallest component in the circuit. It can be seen that increasing the number of wire winding turns N means increasing the on-resistance and manufacturing difficulty, and reducing the length lc of the magnetic core means reducin...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01F27/24H01F27/36
CPCH01F27/24H01F27/36
Inventor赵晖陈屹然
Owner南京能利芯科技有限公司