CN2514469Y

CN2514469Y - Composite structure magnetic core of functional material

Info

Publication number: CN2514469Y
Application number: CN 01241343
Authority: CN
Inventors: 赵强
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-24
Filing date: 2001-04-24
Publication date: 2002-10-02
Anticipated expiration: 2011-04-24

Abstract

The utility model relates to a functional-material compound-structure magnetic core belonging to magnetic material, which is simple in structure and can realize different performance requirements by conveniently changing the structure. The specificities of plural magnetic material can be combined and configured in a compound structure to form a compound component which is good in electromagnetic compatibility, the continuous stability and abrupt change of acquired electromagnetic characteristics can better satisfy the requirements of electronic technologies, and thereby the utility model has broad application values and a wide market outlook.

Description

Functional material composite construction magnetic core

The utility model functional material composite construction magnetic core, affiliated technical field is a magnetic element, before the utility model, be to make whole magnetic core mostly in the prior art with single magnetic material, as ferrite, ferrocart core, permalloy, amorphous material, the microcrystal material, the silicon steel soft magnetic material, also useful two kinds of different magnetic materials are made sheet and are superimposed and make magnetic core, no matter be single, or the structure of stack, all can not effectively bring into play the combination property of multiple material, as high magnetic conductivity ferrite, nickel zinc high frequency ferrite, satisfying, it is not high to close magnetic flux density, magnetic permeability is lower, temperature stability is general, and Curie point is lower, but the frequency of utilization wide ranges is up to the megahertz level, stress sensitivity is not strong, price is also cheap; The ferrocart core magnetic permeability is low, not strong, full magnetic flux density height, the low price of closing of stress sensitivity; Silicon steel low frequency DC and AC characteristics is all good, stress sensitivity is little, low price; Permalloy has the comprehensive soft magnet performance of excellent low frequency, intermediate frequency, but price height, stress sensitivity are strong; Amorphous and microcrystallizing alloy soft magnetic material have more excellent low frequency, intermediate frequency soft magnetic characteristic, but stress sensitivity is strong, price is higher, the single performance of various materials is always both advantageous and disadvantageous, can make their advantage complementation just need combined material, the variation of combining structure reaches B-H magnetic hysteresis loop change of shape, thereby cause that the respective electrical parameter of magnetic characteristic changes, obtain continuously or the electromagnetic property of sudden change, with the various requirement of the power electronic technology that adapts to continuous development.

The purpose of this utility model is: a kind of functional material composite construction magnetic core is provided, it is to use ferrite, ferrocart core, silicon steel, amorphous, ultracrystallite, soft magnetic materials such as permalloy, permanent-magnet ferrite and neodymium iron boron effectively configuration are combined in composite construction, can use one or more magnetic materials to make magnetic core, can make a kind of magnetic material realize multiple use by simple structural change, such as making saturation induction density increase or minimizing etc., because the electromagnetic property parameter changes, and produce different purposes, can utilize the specificity of multiple magnetic material, form comprehensive soft magnet performance excellence, the composite component that Electro Magnetic Compatibility is strong, also can obtain electromagnetic property continuous or sudden change, to adapt to electric power, the specific (special) requirements of electronic technology and communications industry is especially for transformer, inductance, the spike inhibitor, filter, instrument transformer etc.

The technical solution of the utility model is such: use silicon steel, magnetic such as ferrite or ferrocart core material is done circular, the ring box of Long Circle or rectangle, on the ring box ring lid is arranged, adopt silicon steel, ferrite, ferrocart core, or radial permanent-magnet ferrite, neodymium iron boron is made, in the ring box inside groove ultracrystallite (nanocrystalline) is housed, amorphous, permalloy, silicon steel core, magnetic core can be that individual layer also can be a multilayer, circle at ring box and lid, adhere on Long Circle or straight-flanked ring outer wall and the inner hole wall or be with insulation and be not less than 3000 volts insulating barrier, garden shape, the interior ring equivalent diameter 0.5-200mm of Long Circle or straight-flanked ring box, outer shroud equivalent diameter 4-260mm, the high 4-160mm of box.

Lid on the ring box of garden shape, Long Circle or rectangle can be and the corresponding garden of ring box shape, Long Circle, straight-flanked ring box and its make-up that lid wants corresponding up and down with the groove of box; Material as the ring lid can be identical or different with the ring box.The inside groove of ring box is single groove or multiple-grooved, and cell wall thickness is not less than 0.5mm can be provided with ring-like interlayer cell wall in groove, and cell wall can be soft magnetic ferrite, permanent-magnet ferrite, neodymium iron boron or insulating material; Magnetic core in the groove can be a major diameter suit minor diameter; Magnetic core also can be made opening, and A/F is 0.2-3mm, at opening part, need add the pad of permanent-magnet ferrite, neodymium iron boron or the insulating material of same width; When in groove, setting up the insulation interlayer, can be telescopic; Above and below at magnetic core can also be provided with permanent-magnet ferrite, and neodymium iron boron or insulating material packing ring also can add soft magnetic ferrite or insulating material packing ring when adopting layers of magnetic core between magnetic core.

Insulating material of the present utility model can be selected ABS paster, PVC, PEK, PBT, poly-tetrafluoro and nylon 66 etc. for use, can make garden shape, Long Circle or rectangular ring sleeve.

The utility model advantage compared with prior art is: application band broadening, temperature limit expansion, electromagnetic compatibility characteristic enlarge, the lasting steady and the sudden change of electromagnetic property more can be satisfied the requirement of electronic technology, power becomes aspects such as feed signals inductive transfer, the ripple control of making an uproar and demonstrates comprehensive excellent properties and corresponding matching properties, only need simple mapped structure, such as, change lid or change magnetic core, just can realize different performance requirements, be difficult in the prior art accomplish.

The utility model provides following accompanying drawing:

Fig. 1: garden type ring boxlike magnetic core schematic diagram

Fig. 2: straight-flanked ring boxlike magnetic core schematic diagram

Fig. 3: Long Circle multiple-grooved ring boxlike magnetic core schematic diagram

Further specify technology contents of the present utility model below in conjunction with accompanying drawing with embodiment:

In the diagram: 1 box body, 2 lids, 3 magnetic cores, 4 insulating barriers, 5 interlayer cell walls, 6 pads, 7 packing rings.

Embodiment 1: as shown in Figure 1: adopt high magnetic conductivity ferrite TL5 initial permeability 5000Gs/Oe to do the annular box body 1 and the lid 2 of function material composite cores with the utility model technology, external diameter φ 340mm, internal diameter φ 18, ring box wall thickness 2mm, the high 9mm of box, cover thick 4mm, do insulating barrier with thick 0.5mm nylon 66 annuluss 3, initial permeability＞5000Gs/Oe does iron core 4 with ultracrystallite (nanocrystalline), it is upper and lower to have insulating material packing ring 7 to turn to common mode inductance, be applied to the EMI anti-interference filter, also can be used for making the capability correction device.Embodiment 2 is as Fig. 2. shown in.: do the straight-flanked ring box box body 1 and the lid 2 of composite cores with power ferrite TP4 initial permeability 2500Gs/Oe, the high 20mm of the rectangle length of side 84 * 54mm ring endoporus length of side 60 * 30mm box; Cover thick 5mm, rectangular ring permalloy magnetic core 3 is arranged in the straight-flanked ring box, and core diameter 3.6mm has one deck ABS paster insulating barrier 4 on the outer wall of rectangular box and inner hole wall, thickness is 0.2mm, and the lid that overall dimension is identical is buckled on the box body magnetic core of power transformer and has just made.

Embodiment 3: as shown in Figure 3: the ring box body 1 ring lid 2 of making oval annular of ferrocart core, in the centre of ring box groove the concentric Long Circle interlayer cell wall 5 of one circle is arranged, thickness is 1mm, set thereon, the interlayer cell wall degree of depth is identical with groove depth, respectively ultracrystallite is housed and amorphous magnetic material is made magnetic core in two oval annular grooves, wherein amorphous magnetic material Long Circle magnetic core can be that closed hoop also can add pad 6 by opening.Oval ring box radius R 20mm, centre-to-centre spacing 5mm, the high 12mm of box, the thick 4mm of lid is used for DC and takes turns out anti-current device magnetic core.

The utility model is when being used for the common mode inductance magnetic core of EMI, single use high magnetic conductivity ferrite of past, though below the low-frequency range 100KHz, initial permeability is up to 15000Gs/Oe but more than low many of the initial permeability 60000-120000Gs/Oe of ultracrystallite iron core, low frequency noise reduction filtering effect is many than latter difference also, and the ultracrystallite iron core, but drop to hundreds of to a few kilogauss/oersteds at high band greater than 100KHz to 500KHz initial permeability, and this frequency range FERRITE CORE initial permeability can maintain about 5000Gs/Oe, like this two kinds of soft magnetic materials are combined in and turn to common mode inductance in the composite construction and should just can in the 500KHz scope, effectively improve the insertion loss of anti-interference filter in the EMI anti-interference filter.Strengthen the noise reduction filtering effect, this composite construction has overcome the strong weakness of ultracrystallite soft magnetic material stress sensitivity simultaneously, and not high this kind of the bright prospects magnetic core that has city=field to use of the price of composite cores also can be used for making the capability correction device.

Use the ferrite composite construction, the suit ultracrystallite. amorphous. the permalloy iron core is made power transformer and is being adapted under the cooling condition, under different frequency range and field intensity power output keep constant

When being used to take turns out inductance, ferrite. ferrocart core. controlled micro crystallization amorphous iron core composite construction magnetic core can produce very big electric induction when the DC bias current changes, cause in the low current amount during than maximum current flow, inductance value have more 10-40 doubly more than.This feature is taken turns out the anti-current device of great use for the DC that makes switching power supply, and this class component is kept ongoing operation when extremely hanging down load and on some EMI purposes.

The utility model functional material composite construction magnetic core, simple in structure, easy restructures, just can realize different performance requirements, can utilize the specificity of multiple magnetic material, the lasting steady and the sudden change that form the strong composite component of the excellent Electro Magnetic Compatibility of comprehensive soft magnet performance, electromagnetic property more can be satisfied the requirement of electronic technology, and value and vast market prospect have a wide range of applications.

Claims

1, a kind of functional material composite construction magnetic core, it is to be made of the magnetic material with regular geometric shapes, it is characterized in that: it comprises ring box, ring lid, magnetic core, ring lid on the ring box can be the ring lid of magnetic material or insulating material, in the inside groove of ring box magnetic core is housed, on the outer wall and inner hole wall of ring box and ring lid, adhere to or be with insulation and be not less than 3000 volts insulating barrier, 0.5～200 millimeter of the interior ring equivalent diameter of ring box, 4～260 millimeters of outer shroud equivalent diameters, box is high 4～160 millimeters.

2, functional material composite construction magnetic core as claimed in claim 1, it is characterized in that: described ring box can be the ring box that magnetic materials such as silicon steel, ferrite, ferrocart core are made garden shape, oval or rectangle, the magnetic material that described ring lid uses can be: silicon steel, ferrite, ferrocart core, radial permanent-magnet ferrite, neodymium iron boron, magnetic core in the ring box inside groove, can be single or multiple lift, can be that ultracrystallite is promptly nanocrystalline, the magnetic core of amorphous, permalloy, silicon steel.

3, functional material composite construction magnetic core as claimed in claim 1, it is characterized in that: the lid of ring box be by with ring box corresponding garden shape, Long Circle or the ring box of rectangle and the lid that its make-up is made, lid wants corresponding up and down with the groove of box, and the material of box and lid can be the same or different.

4, functional material composite construction magnetic core as claimed in claim 1, it is characterized in that: the inside groove of ring box is single groove or multiple-grooved, cell wall thickness is not less than 0.5mm can be provided with ring-like interlayer cell wall in groove, cell wall can be soft magnetic ferrite or hard ferrite, neodymium iron boron or insulating material.

5, as claim 1,4 described functional material composite construction magnetic cores, it is characterized in that: when setting up the insulation interlayer in the groove, can be telescopic.

6, functional material composite construction magnetic core as claimed in claim 1 is characterized in that: two or more magnetic material magnetic core can be a major diameter suit minor diameter.

7, functional material composite construction magnetic core as claimed in claim 1 is characterized in that iron core can make opening, and A/F is 0.2～3mm, need add permanent-magnet ferrite, neodymium iron boron or the dielectric spacer material of same width at opening part.

8, functional material composite construction magnetic core as claimed in claim 1 is characterized in that: permanent-magnet ferrite, neodymium iron boron or insulating material packing ring are set in the above and below of iron core.

9, functional material composite construction magnetic core as claimed in claim 1 is characterized in that: the packing ring that can adopt soft magnetic ferrite or insulating material when adopting the multilayer iron core between the multilayer iron core.

10, functional material composite construction magnetic core as claimed in claim 1 is characterized in that: insulating material of the present utility model can select for use materials such as ABS paster, PVC, PEK, PBT, poly-tetrafluoro and nylon 66 also can make garden shape, Long Circle or rectangular ring sleeve.