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Inductor and switching circuit comprising inductor

A switching circuit and inductor technology, applied in the field of inductors and switching circuits containing them, can solve the problems of increased cost, low magnetic permeability magnetic core materials, etc., and achieve the effect of reducing eddy current loss and reducing costs.

Active Publication Date: 2015-03-18
DELTA ELECTRONICS (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this inductor is that the amount of low-permeability core material used in the production is relatively large, which increases additional costs

Method used

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  • Inductor and switching circuit comprising inductor
  • Inductor and switching circuit comprising inductor
  • Inductor and switching circuit comprising inductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides an inductor, the schematic side view of the inductor structure is as follows Figure 5 shown. The inductor has a UI structure, including a magnetic core structure composed of a yoke 101 and a stem 103 , and the yoke 101 and the stem 103 form a closed magnetic circuit. The stem is the part of the magnetic core wrapped by the winding, and the yoke is the part of the magnetic core not wrapped by the winding, which is also the case in the following embodiments.

[0043] The coil winding 102 is disposed around the stem 103 , and between the stem 103 and the yoke 101 includes an insulating plate 104 near the yoke and a planar magnetic core unit 105 near the stem 103 .

[0044] The material of the stem 103 and the yoke 101 is a material with high magnetic permeability and high saturation magnetic induction, which can be silicon steel sheet, amorphous, nanocrystalline, etc., and its relative magnetic permeability is greater than or equal to 500. The m...

Embodiment 2

[0076] This embodiment provides another inductance structure, the schematic side view of the inductance structure is as follows Figure 10 shown.

[0077] The inductor has a UI structure, including a magnetic core structure formed by a yoke 201 and a stem 203 , and the yoke 201 and the stem 203 form a closed magnetic circuit. The coil winding 202 is disposed around the stem 203 , and between the stem 203 and the yoke 201 includes an insulating plate 204 near the yoke and a planar magnetic core unit 205 near the stem 203 .

[0078] The material of the magnetic core composed of the stem 203 and the yoke 201 is a material with high magnetic permeability and high saturation magnetic induction, which can be silicon steel sheet, amorphous, nanocrystalline, etc., and its relative magnetic permeability is greater than or equal to 500. The material of the planar magnetic core unit 205 is a material with high magnetic permeability and low saturation magnetic induction, which can be man...

Embodiment 3

[0087] This embodiment provides another inductance structure, the schematic side view of the inductance structure is as follows Figure 13 shown.

[0088] The inductor is a three-phase five-column structure, including a magnetic core structure composed of at least one yoke and a core. The at least one yoke and the core form a closed magnetic circuit. The at least one yoke includes an upper yoke 301, a lower The yoke 301-1 and the side yoke 301-2.

[0089] The coil winding 302 is arranged around the stem 303, and between the stem 303 and the upper yoke 301 and the lower yoke 301-1 includes an insulating plate 304 near the yoke and a planar magnetic core unit 305 near the stem 303. The magnetic core structure of the embodiment includes three stems, and the stem 303 is one of the stems. There is a planar magnetic core unit 305 between the upper end of each stem and the upper yoke, and there is a planar magnetic core unit 305 between the lower end of each stem and the lower yoke...

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Abstract

The present disclosure provides an inductor and a switching circuit including the inductor. The inductor at least includes a winding, and a magnetic core which includes one or more limbs and further includes one or more yokes adapted to form a closed magnetic path, the winding being wounded on the limbs. A gap is provided between at least one end of at least one of the limbs and at least one of the yokes, a flat magnetic core unit is provided in the gap, the flat magnetic core unit is formed of a material having a high permeability and a low saturation magnetic flux density, the limbs and yokes are formed of a material having high permeability and high saturation magnetic flux density, and the saturation magnetic flux density of the material of the flat magnetic core unit is lower than that of the material of the limbs and yokes.

Description

technical field [0001] The invention relates to an inductor and a switch circuit including it. Background technique [0002] At present, various inductors are widely used in various circuits, such as the inductors used in the rectification input circuit and the DC side and AC side of the DC inverter circuit, used in switching conversion circuits such as the DC conversion circuit Buck circuit, Boost circuit, etc. inductance etc. Generally, the use of inductance requires that the inductance be kept as stable as possible within the rated range, at least not lower than the minimum inductance requirement. In use, it is found that the increase in inductance can better suppress the current peak, reduce the current ripple, and reduce the loss of the line. However, if the inductance is kept large from light load current to rated current, the cost of making the inductor will increase and the volume will increase. Therefore, when the volume remains the same, increase the inductance a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24H01F3/14H02M1/00
CPCH02M1/14H01F2003/106H02M2001/0048H01F38/023
Inventor 王昭晖褚江黃智
Owner DELTA ELECTRONICS (SHANGHAI) CO LTD
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