CN212847924U - Magnetic core, magnetic integrated device and circuit board, domestic appliance thereof - Google Patents
Magnetic core, magnetic integrated device and circuit board, domestic appliance thereof Download PDFInfo
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- CN212847924U CN212847924U CN202022316943.9U CN202022316943U CN212847924U CN 212847924 U CN212847924 U CN 212847924U CN 202022316943 U CN202022316943 U CN 202022316943U CN 212847924 U CN212847924 U CN 212847924U
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Abstract
The utility model discloses a magnetic core, magnetism integrated device and circuit board, domestic appliance, two-layer integrated structure about the magnetic core adoption that adopts supplies the coil winding of different grade type to wind respectively on the circuit board and establishes, has realized being in the same place the magnetic device integration that will separate originally, can effectively reduce the volume of magnetic core and magnetism integrated device, reduction in production cost. First magnetic core subassembly and second magnetic core subassembly adopt the magnetic core material of different magnetic conductivities to constitute, and the third magnetic core portion of second magnetic core subassembly fourth magnetic core portion with constitute continuous confined annular between the second magnetic core portion, first magnetic core subassembly, second magnetic core subassembly and magnetic core are whole not all to have obvious open-ended air gap, the magnetic leakage phenomenon of ability greatly reduced magnetic core, can select the magnetic core material who constitutes first magnetic core subassembly and second magnetic core subassembly according to the winding type of actual wire winding, can satisfy the performance requirement of magnetism integrated device, can not produce magnetic interference to the periphery, simple structure moreover, assembly production is convenient.
Description
Technical Field
The utility model relates to an electron device technical field especially relates to a magnetic core, magnetism integrated device and circuit board, domestic appliance thereof.
Background
Magnetic devices, such as filters, transformers, inductors, and the like, are widely used in the fields of power electronic power conversion, switching power supplies, variable frequency air conditioning systems, and the like. Magnetic devices are the primary devices that accomplish energy storage and conversion, filtering, and electrical isolation, and can affect the overall performance of the converter in a number of ways. The magnetic core is an important component of the magnetic part, and the volume of the magnetic core is an important factor influencing the volume and the weight of the magnetic part. At present, most of magnetic device products are independently designed and used by adopting a discrete magnetic core, so that the number of the magnetic devices is large, the size is large, and the cost is high. Among the prior art scheme, also have and adopt magnetism integrated technology, independent magnetism spare passes through the design of magnetic core structure promptly for the produced magnetic flux of two different magnetism spares produces the interact: either strengthened or weakened. The technology integrates the two magnetic pieces together, thereby achieving the purposes of reducing the volume of the magnetic pieces and reducing the cost.
For a magnetic device that stores energy or filters, the permeability cannot be too high in the case of magnetic core unsaturation in order to efficiently store and return energy into the circuit. Or to avoid saturation of the magnetic core while maintaining normal magnetic permeability, an air gap is generally formed in the magnetic core, which is equivalent to connecting a non-magnetic air gap in series in the magnetic core material to adjust the effective magnetic permeability of the magnetic core. However, the air gap may have leakage flux, which may cause magnetic interference to the surroundings.
SUMMERY OF THE UTILITY MODEL
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
An embodiment of the utility model provides a, can reduce the volume of magnetic device, and satisfy the demand of magnetic device performance and low magnetic leakage.
In a first aspect, an embodiment of the present invention provides a magnetic core, including:
the first magnetic core assembly comprises a first magnetic core part and a second magnetic core part, and a continuous closed ring shape is formed between the first magnetic core part and the second magnetic core part;
a second magnetic core assembly located above the first magnetic core assembly, the second magnetic core assembly including a third magnetic core portion and fourth magnetic core portions disposed on both sides of the third magnetic core portion, the fourth magnetic core portion, and the first magnetic core portion forming a first closed magnetic path therebetween; the third magnetic core part, the fourth magnetic core part and the second magnetic core part form a continuous closed ring shape;
the first magnetic core component and the second magnetic core component are made of magnetic core materials with different magnetic permeability.
The utility model discloses a two-layer integrated configuration about the magnetic core adopts, including first magnetic core subassembly and second magnetic core subassembly, supply the coil winding of different grade type on the circuit board respectively to wind and establish, realized being in the same place the magnetic device integration that will originally separate, can effectively reduce the volume of magnetic core and magnetic integrated device, reduction in production cost. The first magnetic core component comprises a first magnetic core part and a second magnetic core part which form a continuous closed ring shape, so that the first magnetic core component forms a closed magnetic circuit, and the second magnetic core component forms a first closed magnetic circuit with the first magnetic core part through a third magnetic core part and a fourth magnetic core part. In addition, the first magnetic core component and the second magnetic core component are made of magnetic core materials with different magnetic conductivities, the third magnetic core part of the second magnetic core component, the fourth magnetic core part and the second magnetic core part form a continuous closed ring, so that the whole of the first magnetic core component, the second magnetic core component and the magnetic core does not have an air gap with an obvious opening, the magnetic leakage phenomenon of the magnetic core can be greatly reduced, and the first magnetic core component and the second magnetic core component are made of the magnetic core materials with different magnetic conductivities, so that the magnetic core materials of the first magnetic core component and the second magnetic core component can be selected according to the winding type of actual winding, the performance requirements of a magnetic integrated device can be met, meanwhile, the magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient.
In one embodiment of the present invention, the second magnetic core assembly further includes a first center pillar, one end of the first center pillar is connected to the third magnetic core portion, and the other end is connected to the first magnetic core portion. Through setting up first center pillar, can make the winding that second magnetic core assembly corresponds around establishing on this first center pillar, can satisfy under the prerequisite of the same magnetic flux, reduce the width of second magnetic core assembly both sides, reduce the volume of second magnetic core assembly, can further reduce cost.
In an embodiment of the present invention, the second magnetic core portion includes a first side pillar and a second side pillar disposed at two sides thereof, the second magnetic core portion further includes a third side pillar parallel to the first magnetic core portion, and two ends of the third side pillar are respectively connected to the first side pillar and the second side pillar; the first magnetic core assembly further comprises a second center pillar, and two ends of the second center pillar are connected with the first magnetic core portion and the third pillar respectively. Through the second center pillar of second magnetic core portion in the first magnetic core subassembly, can make the winding that first magnetic core subassembly corresponds around establishing on this second center pillar, can satisfy under the prerequisite of the same magnetic flux, reduce the width of first magnetic core subassembly both sides, reduce the volume of first magnetic core subassembly, can further reduce cost.
In an embodiment of the present invention, the second magnetic core assembly further includes a first center pillar, one end of the first center pillar is connected to the third magnetic core portion, and the other end of the first center pillar is connected to the first magnetic core portion; the second magnetic core part comprises a first side column and a second side column which are arranged on two sides of the second magnetic core part, the second magnetic core part further comprises a third side column which is parallel to the first magnetic core part, and two ends of the third side column are respectively connected with the first side column and the second side column; the first magnetic core assembly further comprises a second center pillar, and two ends of the second center pillar are connected with the first magnetic core portion and the third pillar respectively. Through setting up first center pillar and second center pillar, can make the winding that first magnetic core assembly corresponds around establishing on this second center pillar, the winding that second magnetic core assembly corresponds is around establishing on this first center pillar, can satisfy under the prerequisite of the same magnetic flux, reduces the width of first magnetic core assembly and second magnetic core assembly both sides, reduces the volume of first magnetic core assembly and second magnetic core assembly, can further reduce cost.
In one embodiment of the present invention, the magnetic permeability of the first magnetic core assembly is higher than the magnetic permeability of the second magnetic core assembly. Because the first magnetic core portion has a higher magnetic permeability than the second magnetic core portion, the second magnetic core assembly has a better energy storage capability than the first magnetic core assembly and is suitable for coil windings for energy storage and filtering. In contrast, the first core assembly is suitable for use in a coil winding of a magnetic device such as a transformer or common mode inductor.
In one embodiment of the present invention, the second magnetic core assembly is made of magnetic powder core material. The material constituting the second magnetic core assembly is a magnetic powder core material, and the magnetic powder core is generally formed by mixing a powder of an extremely fine magnetic material and a composite as a binder, and molding and curing the mixture to form a ring-shaped powder metal magnetic core. Since there are a large amount of non-magnetic material in the magnetic powder core, corresponding to many non-magnetic distributed air gaps in the magnetic core, which are used to store considerable energy when magnetizing, this core can be used as the magnetic core of inductance and flyback transformers, but the energy is not stored in the high-permeability metal alloy magnetic material part of the magnetic powder core. Because the second magnetic core component adopts magnetic powder core type materials, the performance requirements of energy storage or filtering magnetic devices can be met, and therefore the third magnetic core part, the fourth magnetic core part and the first magnetic core component of the second magnetic core component form a continuous closed ring shape, so that the whole magnetic core has no obvious open air gap, and the magnetic leakage phenomenon of the magnetic core can be greatly reduced.
In an embodiment of the present invention, the second magnetic core component is any one of an iron powder core, a sendust core, an iron-nickel magnetic powder core, an iron-silicon core, a molypermalloy magnetic powder core or an iron-nickel high magnetic flux core.
In an embodiment of the present invention, the first magnetic core assembly is any one of a ferrite magnetic core, a permanent-conducting alloy magnetic core, an amorphous alloy magnetic core, or a silicon steel sheet magnetic core.
In a second aspect, the present invention provides a magnetic integrated device, including the utility model discloses the magnetic core of the first aspect, the magnetic integrated device still includes first winding and second winding, first winding is around establishing on the first magnetic core subassembly of magnetic core, the second winding is around establishing on the second magnetic core subassembly of magnetic core. Because the magnetic core adopts upper and lower two-layer integrated configuration, including first magnetic core subassembly and second magnetic core subassembly, supply the coil winding of different grade type on the circuit board respectively to wind and establish, realized being in the same place the integrated magnetic device that originally separates, can effectively reduce the volume of magnetic core and magnetism integrated device, reduction in production cost. The first magnetic core component comprises a first magnetic core part and a second magnetic core part which form a continuous closed ring shape, so that the first magnetic core component forms a closed magnetic circuit, and the second magnetic core component forms a first closed magnetic circuit with the first magnetic core part through a third magnetic core part and a fourth magnetic core part. In addition, the first magnetic core component and the second magnetic core component are made of magnetic core materials with different magnetic conductivities, the third magnetic core part of the second magnetic core component, the fourth magnetic core part and the second magnetic core part form a continuous closed ring, so that the whole of the first magnetic core component, the second magnetic core component and the magnetic core does not have an air gap with an obvious opening, the magnetic leakage phenomenon of the magnetic core can be greatly reduced, and the first magnetic core component and the second magnetic core component are made of the magnetic core materials with different magnetic conductivities, so that the magnetic core materials of the first magnetic core component and the second magnetic core component can be selected according to the winding type of actual winding, the performance requirements of a magnetic integrated device can be met, meanwhile, the magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient.
The third aspect of the present invention provides a circuit board, including the magnetic integrated device of the second aspect of the present invention. Because the magnetic core that magnetism integrated device adopted in the circuit board adopts upper and lower two-layer integrated structure, including first magnetic core subassembly and second magnetic core subassembly, supply the coil winding of different grade type on the circuit board respectively to wind and establish, realized that the magnetism device that will originally separate is integrated together, can effectively reduce the volume of magnetic core and magnetism integrated device, reduction in production cost. The first magnetic core component comprises a first magnetic core part and a second magnetic core part which form a continuous closed ring shape, so that the first magnetic core component forms a closed magnetic circuit, and the second magnetic core component forms a first closed magnetic circuit with the first magnetic core part through a third magnetic core part and a fourth magnetic core part. In addition, the first magnetic core component and the second magnetic core component are made of magnetic core materials with different magnetic conductivities, the third magnetic core part of the second magnetic core component, the fourth magnetic core part and the second magnetic core part form a continuous closed ring, so that the whole of the first magnetic core component, the second magnetic core component and the magnetic core does not have an air gap with an obvious opening, the magnetic leakage phenomenon of the magnetic core can be greatly reduced, and the first magnetic core component and the second magnetic core component are made of the magnetic core materials with different magnetic conductivities, so that the magnetic core materials of the first magnetic core component and the second magnetic core component can be selected according to the winding type of actual winding, the performance requirements of a magnetic integrated device can be met, meanwhile, the magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient.
In a fourth aspect, the present invention provides a household electrical appliance, including the circuit board of the third aspect of the present invention. Two-layer integrated structure about the magnetic core that magnetism integrated device adopted in the circuit board adopts, including first magnetic core subassembly and second magnetic core subassembly, supply the coil winding of different grade type on the circuit board respectively to wind and establish, realized being in the same place the magnetism device integration that will originally separate, can effectively reduce the volume of magnetic core and magnetism integrated device, reduction in production cost. The first magnetic core component comprises a first magnetic core part and a second magnetic core part which form a continuous closed ring shape, so that the first magnetic core component forms a closed magnetic circuit, and the second magnetic core component forms a first closed magnetic circuit with the first magnetic core part through a third magnetic core part and a fourth magnetic core part. In addition, the first magnetic core component and the second magnetic core component are made of magnetic core materials with different magnetic conductivities, the third magnetic core part of the second magnetic core component, the fourth magnetic core part and the second magnetic core part form a continuous closed ring, so that the whole of the first magnetic core component, the second magnetic core component and the magnetic core does not have an air gap with an obvious opening, the magnetic leakage phenomenon of the magnetic core can be greatly reduced, and the first magnetic core component and the second magnetic core component are made of the magnetic core materials with different magnetic conductivities, so that the magnetic core materials of the first magnetic core component and the second magnetic core component can be selected according to the winding type of actual winding, the performance requirements of a magnetic integrated device can be met, meanwhile, the magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technical solutions of the present invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the present invention for explaining the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.
Fig. 1 is a structural view of a magnetic core according to an embodiment of the present invention;
fig. 2 is a structural view of a magnetic core according to an embodiment of the present invention;
fig. 3 is a structural view of a magnetic core according to an embodiment of the present invention;
fig. 4 is a structural view of a magnetic core according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram applied to a magnetic integrated device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a magnetic integrated device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It should be understood that in the description of the embodiments of the present invention, a plurality or items are two or more, and greater than, less than, more than, etc. are understood as excluding the number, and greater than, less than, etc. are understood as including the number. If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features.
Magnetic devices, such as transformers and inductors for short, are widely used in the fields of power electronic power conversion, switching power supplies, variable frequency air conditioning systems, and the like, and are also important components of the switching power supplies. The magnetic component is the primary device that performs energy storage and conversion, filtering, and electrical isolation, and can affect the overall performance of the converter in a number of ways.
On the one hand, the magnetic member is the main factor influencing the volume and weight of the transducer, and according to statistics, the weight of the magnetic member is generally 30-40% of the total weight of the transducer, the volume accounts for 20-30% of the total volume, and for a power supply which works at high frequency and is designed in a modular manner, the proportion of the volume and the weight of the magnetic member is higher than the data given above. On the other hand, the selection of the magnetic part parameters such as the size of the output filter inductor directly affects the output current ripple and the output dynamic performance of the power supply. In yet another aspect, losses in the magnetic member can affect the efficiency of the converter.
If a plurality of magnetic devices are mutually independent, the occupied volume is large, and the layout of other elements on the circuit board can be seriously influenced. And because the volume of magnetic device can not be done for a short time, can seriously influence the power density of whole power module, simultaneously, the cost of a plurality of independent magnetic devices is very high, and the loss of magnetic core and winding copper loss are all great.
In order to reduce the volume and weight of the magnetic member and improve the filtering performance of the magnetic device, one way is to increase the frequency of the alternating current, but the high-frequency way still has certain limitations, and is not applicable to all scenes. In order to further reduce the volume and loss of the Magnetic element and ensure good performance of the converter, a Magnetic Integrated Magnetic (IM) technology can be adopted. Magnetic integration technology, that is, the design of a magnetic core structure by using a single magnetic piece, enables magnetic fluxes generated by two different magnetic pieces to interact: either strengthened or weakened. The technology integrates the two magnetic pieces together, thereby achieving the purposes of reducing the volume of the magnetic pieces and reducing the cost.
Although in principle any type of inductive device (e.g. filter inductor, transformer, etc.) may employ magnetic integration technology, it is practical to adjust the structure of the integrated magnetic core according to the type of integrated magnetic device, for example, for magnetic devices with energy storage or filtering, an air gap needs to be added to the magnetic core to avoid saturation of the magnetic core, so as to withstand a large dc magnetic flux. Increase the air gap and can outwards radiate the leakage magnetic flux on the magnetic core, the leakage magnetic flux can cut the winding coil and lead to leaking inductance and inductance eddy current loss, can produce great magnetic interference to the periphery moreover, influences the work of other components on the circuit board, and then makes domestic appliance's EMI performance decline.
The embodiment of the utility model provides a magnetic core, it is shown with reference to figure 1, this magnetic core includes:
a first magnetic core assembly 110 including a first magnetic core portion 120 and a second magnetic core portion 130, the first magnetic core portion 120 and the second magnetic core portion 130 forming a continuous closed loop therebetween;
a second magnetic core assembly 140 located above the first magnetic core assembly 110, the second magnetic core assembly 140 including a third magnetic core portion 141 and fourth magnetic core portions 142 disposed on both sides of the third magnetic core portion 141, the fourth magnetic core portions 142, and the first magnetic core portion 120 forming a first closed magnetic path therebetween; the third magnetic core portion 141, the fourth magnetic core portion 142 and the second magnetic core portion 130 form a continuous closed ring shape therebetween;
the first core assembly 110 and the second core assembly 140 are formed using core materials having different magnetic permeability.
Referring to fig. 1, the magnetic core provided by the embodiment of the present invention includes a first magnetic core assembly 110 and a second magnetic core assembly 140, wherein the first magnetic core assembly 110 is located at a lower layer, the second magnetic core assembly 140 is located at an upper layer, the first magnetic core assembly 110 and the second magnetic core assembly 140 are respectively used for integrating coil windings of different types, wherein the first magnetic core assembly 110 and the second magnetic core assembly 140 can be respectively wound around magnetic core windings of different types, the first magnetic core assembly 110 is used for winding around a first winding, and the second magnetic core assembly 140 is used for winding around a second winding. (e.g., the first and second magnetic core assemblies 110 and 140 may be wound with power inductor and transformer windings, respectively). Because the magnetic core is of an upper-layer three-dimensional structure and a lower-layer three-dimensional structure, the occupied area of the magnetic core on the circuit board can be effectively reduced, and the wiring design of the electric control circuit board is further facilitated.
Wherein the first magnetic core assembly 110 is shaped as a continuous closed loop and the first magnetic core assembly 110 comprises the first magnetic core portion 120 and the second magnetic core portion 130, it can also be understood that the first magnetic core portion 120 and the second magnetic core portion 130 form a closed continuous loop, that is, the first magnetic core portion 120 and the second magnetic core portion 130 are tightly connected or are in an integral loop shape, wherein no air gap exists. It is understood that the first magnetic core assembly 110 may be a square magnetic core assembly, for example, as shown in fig. 1, the second magnetic core portion 130 of the first magnetic core assembly 110 includes a first side pillar 131 and a second side pillar 132 disposed at both sides thereof, the second magnetic core portion 130 further includes a third side pillar 133 parallel to the first magnetic core portion 120, and both ends of the third side pillar 133 are respectively connected to the first side pillar 131 and the second side pillar 132, so that the first magnetic core portion 120, the first side pillar 131, the second side pillar 132 and the third side pillar 133 form the square magnetic core assembly.
The second magnetic core assembly 140 includes a third magnetic core portion 141 and fourth magnetic core portions 142 disposed on both sides of the third magnetic core portion 141, and it can also be understood that the fourth magnetic core portions 142 serve as side legs of the second magnetic core assembly 140. Referring to fig. 1, second magnetic core assembly 140 may be a U-shaped magnetic core assembly. The first magnetic core assembly 110 is connected with the second magnetic core assembly 140, and there is no air gap between the connection positions, that is, the third magnetic core portion 141 and the fourth magnetic core portions 142 on two sides thereof abut against the first magnetic core assembly 110, so that a continuous closed loop is formed among the third magnetic core portion 141, the fourth magnetic core portions 142 and the second magnetic core portion 130. At this time, a first closed magnetic path is formed among the third core portion 141, the fourth core portion 142, and the first core portion 120, for use by the corresponding second winding of the second magnetic core assembly 140. Accordingly, the first magnetic core assembly 110 itself constitutes a second closed magnetic circuit for use with a corresponding first winding of the first magnetic core assembly 110. Therefore, the first magnetic core assembly 110 and the second magnetic core assembly 140 share the first magnetic core portion 120 to form a closed magnetic circuit, so that the volume of the magnetic core and the magnetic device using the magnetic core can be further reduced, and the wiring design of the electronic control circuit board and the miniaturization design of the electronic control circuit board, the electronic control box and the like are facilitated.
The first core assembly 110 and the second core assembly 140 are made of core materials with different magnetic permeability, which may be core materials with different chemical compositions, such as ferrite core and powdered iron core. Materials with the same chemical composition but different specifications can also be adopted and belong to different magnetic core materials, for example, the same iron-silicon-aluminum magnetic core, the magnetic core materials with different iron, silicon and aluminum proportions can also belong to different magnetic core materials although the chemical compositions are all composed of iron, silicon and aluminum. Because the first magnetic core assembly 110 and the second magnetic core assembly 140 are made of magnetic core materials with different magnetic conductivities, the magnetic core materials of the first magnetic core assembly 110 and the second magnetic core assembly 140 can be selected according to the winding type of actual winding, so that the performance requirement of a magnetic integrated device can be met, magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient.
The magnetic permeability of the first magnetic core assembly 110 is higher than that of the second magnetic core assembly 140, so that the second magnetic core assembly 140 has better energy storage capacity than the first magnetic core assembly 110, and is suitable for coil windings for energy storage and filtering. In contrast, the first core assembly 110 is suitable for use in a coil winding of a magnetic device such as a transformer or common mode inductor.
The first magnetic core assembly 110 may be made of a magnetic core material with a high magnetic permeability, such as a ferrite magnetic core, a constant-permeability alloy magnetic core, an amorphous alloy magnetic core, or a silicon steel sheet magnetic core. The method can be applied to windings of magnetic devices such as transformer windings or common-mode inductance windings which have low requirements on energy storage.
Of these, for ferrite cores, manganese-zinc-ferrite and nickel-zinc-ferrite materials are mainly included, the most common combination being manganese and zinc MnZn, or nickel and zinc NiZn. Other metals are added to achieve the desired magnetic properties, and these materials exhibit good magnetic properties at the curie temperature, they can be easily magnetized, and they have high electrical resistivity, and thus can operate at high frequencies without having to be laminated like silicon steel sheets. The core loss depends on the thickness of the tape and the silicon content. The higher the silicon content, the higher the resistivity, the lower the losses. For the constant-conductivity alloy magnetic core, the constant-conductivity metal alloy magnetic core is mainly made of iron-nickel alloy and has high saturation magnetic induction and a flat magnetization curve, so that the constant-conductivity metal alloy magnetic core can obtain stable magnetic conductivity under a wider magnetic field intensity without opening an air gap. The magnetic conductivity is stable, and the design is simple and convenient. The closed magnetic circuit has small electromagnetic interference to the surroundings. High resistivity and low magnetic core loss. The material is ideal for inductance magnetic core and flyback transformer magnetic core. For the amorphous alloy magnetic core, the preparation technology of the amorphous metal and the alloy is completely different from the traditional crystalline state process method, and the ultra-rapid cooling solidification technology with the cooling speed of about 10 ℃/s is adopted to form the thin strip from molten steel into a finished product in one step. Due to the super-quenching solidification, atoms are not in time to be arranged and crystallized in order when the alloy is solidified, and the obtained solid alloy is a long-range disordered structure, does not have crystal grains and crystal boundaries of crystalline alloy, is called amorphous alloy, and has a structure similar to glass, and is also called metal glass. For silicon steel sheet magnetic cores, silicon steel strips are the most widely used magnetic core material in low frequency situations, and the material is usually a strip material with a certain thickness and oriented by directionally rolling crystal grains and has the characteristics of high saturation magnetic flux density and low price.
The second magnetic core assembly 140 may be made of a magnetic powder core material, and the magnetic powder core is generally formed by mixing a powder of an extremely fine magnetic material and a composite as a binder, and then molding and curing the mixture to form a ring-shaped powder metal magnetic core. Since there are a large amount of non-magnetic material in the magnetic powder core, corresponding to many non-magnetic distributed air gaps in the magnetic core, which are used to store considerable energy when magnetizing, this core can be used as the magnetic core of inductance and flyback transformers, but the energy is not stored in the high-permeability metal alloy magnetic material part of the magnetic powder core. Because the second magnetic core assembly 140 is made of magnetic powder core materials, the performance requirements of energy storage or filtering magnetic devices can be met, and therefore the third magnetic core part 141, the fourth magnetic core part 142 and the first magnetic core assembly 110 of the second magnetic core assembly 140 form a continuous closed ring shape, so that the whole magnetic core has no obviously opened air gap, and the magnetic flux leakage phenomenon of the magnetic core can be greatly reduced.
For example, the second magnetic core assembly 140 may be a ferrite core, a sendust core, a magnetic iron-nickel core, a sendust core, a molybdenum permalloy core (MMP), or a magnetic iron-nickel High Flux core (High Flux), among others. The iron powder core is prepared by bonding superfine iron powder and an organic material, the magnetic permeability of the iron powder core is 10-75, the material is soft, the cost is low, and the magnetic core loss is high. The iron-silicon-aluminum magnetic core is a magnetic powder core formed by bonding iron, silicon and aluminum materials, and has low loss and hard material. The metal powder of the iron-nickel magnetic powder core consists of iron and nickel, the magnetic flux density is high, and the magnetic core loss is higher than iron-silicon-aluminum and lower than that of the iron powder core. The MMP molybdenum permalloy is composed of molybdenum, nickel and iron, and has the advantages of low loss, low saturation magnetic flux density and good temperature stability. High Flux, HF iron-nickel High Flux magnetic core, is a magnetic powder core containing 50% nickel and 50% iron. The HF iron-nickel magnetic powder core has a saturation flux density value as high as 13000 gauss, which is much lower in loss value than a pure iron powder core.
Referring to the magnetic core shown in fig. 1, the first magnetic core assembly 110 is made of a magnetic core material with high magnetic permeability, such as a ferrite magnetic core, a constant-permeability alloy magnetic core, an amorphous alloy magnetic core, or a silicon steel sheet magnetic core, and the second magnetic core assembly 140 is made of a magnetic powder core. Thus, the first magnetic core assembly 110 may be wound with a coil winding having a lower energy storage requirement, such as a transformer winding, a common mode inductor, etc., and the second magnetic core assembly 140 may be wound with a coil winding having a higher energy storage requirement, such as a winding of an energy storage inductor, a filter inductor, etc. In addition, the second core assembly 140 can prevent the inductance from dropping sharply after the ferrite is saturated when the coil winding is in an overcurrent state, and the first core assembly 110 can improve the dc bias inductance of the ferrite core when the coil winding is in a normal current state. The performance of the magnetic integrated device is improved.
Referring to fig. 1, the "upper", "lower", "upper layer" and "lower layer" of the embodiment of the present invention only describe the relative positions of the first magnetic core assembly 110 and the second magnetic core assembly 140, wherein the second magnetic core assembly 140 can be mounted on a circuit board, and at this time, the first magnetic core assembly 110 is located above the second magnetic core assembly 140. It is understood that the core may be inverted entirely, i.e., the first core assembly 110 is mounted to the circuit board and the second core assembly 140 is positioned above the first core assembly 110.
Referring to fig. 2, in addition to the magnetic core shown in fig. 1, the second magnetic core assembly 140 is further provided with a first center leg 210, and one end of the first center leg 210 is connected to the third magnetic core portion 141 and the other end is connected to the first magnetic core portion 120 of the first magnetic core assembly 110. The first center leg 210 is integrally formed with the second core assembly 140. As shown in fig. 2, the first center leg 210 is perpendicular to the first core portion 120, the second core element 140 is an E-shaped core element, and the first core element 110 is a square core element. Through setting up first center pillar 210 in second magnetic core assembly 140, can make the winding that second magnetic core assembly 140 corresponds establish on this first center pillar 210 around, can satisfy under the prerequisite of the same magnetic flux, reduce the width of second magnetic core assembly 140 both sides, reduce the volume of second magnetic core assembly 140, can further reduce cost.
Referring to fig. 3, in addition to the magnetic core shown in fig. 1, the first magnetic core assembly 110 is further provided with a second center leg 310, and both ends of the second center leg 310 are connected to the first magnetic core portion 120 and the third leg 133, respectively. As shown in fig. 3, the second center leg 310 is perpendicular to the first core portion 120 and the third leg 133, the first core assembly is an 8-shaped core assembly, and the second core assembly 140 is a C-shaped core assembly. Through set up second center pillar 310 in first magnetic core subassembly 110, can make the winding that first magnetic core subassembly 110 corresponds establish on this second center pillar 310 around, can satisfy under the prerequisite of the same magnetic flux, reduce the width of first magnetic core subassembly 110 both sides, reduce the volume of first magnetic core subassembly 110, can further reduce cost.
Referring to fig. 4, in addition to the magnetic core shown in fig. 1, the second magnetic core assembly 140 is further provided with a first center leg 210, and the first magnetic core assembly 110 is further provided with a second center leg 310. Wherein one end of the first center leg 210 is connected to the third core portion 141, the other end is connected to the first core portion 120 of the first core assembly 110, and both ends of the second center leg 310 are connected to the first core portion 120 and the third side leg 133, respectively. As shown in fig. 4, the first center leg 210 is perpendicular to the first core portion 120, the second core element 140 is an E-shaped core element, and the first core element 110 is a square core element. The second center leg 310 is perpendicular to the first core portion 120 and the third leg 133, the first sub-core assembly is an 8-shaped core assembly, and the second core assembly 140 is an E-shaped core assembly. By providing the second center pillar 310 in the first magnetic core assembly 110 and the first center pillar 210 in the second magnetic core assembly 140, the winding corresponding to the first magnetic core assembly 110 can be wound around the second center pillar 310, and the winding corresponding to the second magnetic core assembly 140 can be wound around the first center pillar 210, so that the widths of both sides of the first magnetic core assembly 110 and the second magnetic core assembly 140 can be reduced, the sizes of the first magnetic core assembly 110 and the second magnetic core assembly 140 can be reduced, and the cost can be further reduced on the premise of satisfying the same magnetic flux.
In any of the above embodiments, the first magnetic core assembly 110 forms a first annular opening, and a second annular opening is formed between the second magnetic core assembly 140 and the first magnetic core assembly 110, where the area of the second annular opening is smaller than the area of the first annular opening, for example, half or less of the area of the first annular opening. The size of the magnetic core can be reduced as much as possible on the basis of meeting the performance requirements of the magnetic integrated device. For example, the height of the fourth core portion 142 may be made half the height of the first and second side legs 131 and 132, or less.
An embodiment of the utility model provides a magnetism integrated device, including magnetic core and first winding and the second winding that above-mentioned arbitrary embodiment mentioned, first winding is around establishing on the first magnetic core subassembly 110 of magnetic core, the second winding is around establishing on the second magnetic core subassembly 140 of magnetic core. Because the magnetic core adopts the integrated structure of upper and lower two-layer, including first magnetic core subassembly 110 and second magnetic core subassembly 140, supply the coil winding of different grade type on the circuit board respectively to wind and establish, realized that the magnetism device that will originally separate is integrated together, can effectively reduce the volume of magnetic core and magnetism integrated device, reduction in production cost. Wherein the first magnetic core assembly 110 comprises the first magnetic core part 120 and the second magnetic core part 130 which form a continuous closed ring shape, so that the first magnetic core assembly 110 forms a closed magnetic circuit, and the second magnetic core assembly 140 forms a first closed magnetic circuit with the first magnetic core part 120 through the third magnetic core part 141 and the fourth magnetic core part 142, it can be seen that the first magnetic core assembly 110 and the second magnetic core assembly 140 share the first magnetic core part 120 to form a closed magnetic circuit, so that the volumes of the magnetic core and the magnetic device using the magnetic core can be further reduced, and the wiring design of the electric control circuit board and the miniaturization design of the electric control circuit board and the electric control box are facilitated. In addition, the first magnetic core assembly 110 and the second magnetic core assembly 140 are made of magnetic core materials with different magnetic conductivities, and a continuous closed ring shape is formed among the third magnetic core part 141, the fourth magnetic core part 142 and the second magnetic core part 130 of the second magnetic core assembly 140, so that the first magnetic core assembly 110, the second magnetic core assembly 140 and the whole magnetic core do not have an air gap with an obvious opening, the magnetic leakage phenomenon of the magnetic core can be greatly reduced, and the first magnetic core assembly 110 and the second magnetic core assembly 140 are made of the magnetic core materials with different magnetic conductivities, so the magnetic core materials for making up the first magnetic core assembly 110 and the second magnetic core assembly 140 can be selected according to the winding type of an actual winding, the performance requirement of a magnetic integrated device can be met, meanwhile, magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient.
Referring to fig. 5, for a specific application of the magnetic integrated device, fig. 5 shows a schematic structural diagram of a power factor correction circuit, where the power factor correction circuit includes an ac input terminal 510, a common mode inductor LF, and a boost rectifier module 520. Specifically, the above-mentioned ac input terminal 510 is used for inputting ac electrical signals, and common mode inductance LF is used for filtering the common mode noise and the harmonic interference of ac electrical signals, and common mode inductance LF is connected to ac input terminal, and the rectifier module that steps up is connected to common mode inductance LF, and the rectifier module that steps up includes power inductance L1 and energy storage device, and power inductance L1 is used for charging energy storage device, and power inductance L1 includes first winding, and common mode inductance includes the second winding. In the prior art, the power inductor L1 and the common mode inductor LF are two independent magnetic devices, and the total volume of the magnetic devices is large, so that the occupied area of the magnetic devices on a circuit board is large, and the miniaturization of a product is not facilitated. Referring to fig. 6, the utility model provides a magnetism integrated device can adopt as shown in fig. 1 magnetic core, and the first magnetic core subassembly 110 of lower floor is continuous annular magnetic core subassembly in the magnetic core, adopts the magnetic core that the magnetic permeability is high, for example ferrite core, permanent magnetic alloy magnetic core, amorphous alloy magnetic core or silicon steel sheet magnetic core, consequently is applicable to around establishing common mode inductance LF's in the circuit shown in fig. 5 first winding 610. The second magnetic core component 140 on the upper layer in the magnetic core, and a continuous closed ring shape is formed between the second magnetic core component 140 and the first magnetic core component 110; the third core portion 141, the fourth core portion 142, and the first core portion 120 of the second magnetic core assembly 140 form a first closed magnetic circuit therebetween, and the third core portion 141, the fourth core portion 142, and the second core portion 130 form a continuous closed loop therebetween. The material of second core assembly 140 is a magnetic powder core, such as a ferrite core, a sendust core, a magnetic iron nickel powder core, a sendust core, a molybdenum permalloy powder core (MMP), or a magnetic iron nickel High Flux core (High Flux), and is therefore suitable for winding second winding 620 of power inductor L1 in the circuit of fig. 5. Therefore, the whole of the first magnetic core assembly 110, the second magnetic core assembly 140 and the magnetic core has no air gap with an obvious opening, the magnetic leakage phenomenon of the magnetic core can be greatly reduced, and the first magnetic core assembly 110 and the second magnetic core assembly 140 are made of magnetic core materials with different magnetic conductivities, so that the magnetic core materials of the first magnetic core assembly 110 and the second magnetic core assembly 140 can be selected according to the winding type of actual winding, the performance requirements of a magnetic integrated device can be met, meanwhile, magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient. Fig. 6 shows an implementation manner of the magnetic integrated device of the present invention, and it can be understood that the magnetic integrated device provided by the embodiment of the present invention can adopt any type of magnetic core shown in fig. 1 to 4 in the above embodiment and any combination of technical solutions in the above magnetic core.
The utility model provides a circuit board, including the magnetism integrated device of any one of the above-mentioned embodiments. Because the magnetic core that magnetism integrated device adopted in the circuit board adopts upper and lower two-layer integrated structure, including first magnetic core subassembly 110 and second magnetic core subassembly 140, supply the coil winding of different grade type on the circuit board respectively to wind and establish, realized that the magnetism device that will originally separate is integrated together, can effectively reduce the volume of magnetic core and magnetism integrated device, reduction in production cost. Wherein the first magnetic core assembly 110 comprises the first magnetic core part 120 and the second magnetic core part 130 which form a continuous closed ring shape, so that the first magnetic core assembly 110 forms a closed magnetic circuit, and the second magnetic core assembly 140 forms a first closed magnetic circuit with the first magnetic core part 120 through the third magnetic core part 141 and the fourth magnetic core part 142, it can be seen that the first magnetic core assembly 110 and the second magnetic core assembly 140 share the first magnetic core part 120 to form a closed magnetic circuit, so that the volumes of the magnetic core and the magnetic device using the magnetic core can be further reduced, and the wiring design of the electric control circuit board and the miniaturization design of the electric control circuit board and the electric control box are facilitated. In addition, the first magnetic core assembly 110 and the second magnetic core assembly 140 are made of magnetic core materials with different magnetic conductivities, and a continuous closed ring shape is formed among the third magnetic core part 141, the fourth magnetic core part 142 and the second magnetic core part 130 of the second magnetic core assembly 140, so that the first magnetic core assembly 110, the second magnetic core assembly 140 and the whole magnetic core do not have an air gap with an obvious opening, the magnetic leakage phenomenon of the magnetic core can be greatly reduced, and the first magnetic core assembly 110 and the second magnetic core assembly 140 are made of the magnetic core materials with different magnetic conductivities, so the magnetic core materials for making up the first magnetic core assembly 110 and the second magnetic core assembly 140 can be selected according to the winding type of an actual winding, the performance requirement of a magnetic integrated device can be met, meanwhile, magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient.
The utility model provides a household appliance, including the circuit board of any one of the above-mentioned embodiments. The magnetic core that magnetism integrated device adopted in the circuit board adopts upper and lower two-layer integrated structure, including first magnetic core subassembly 110 and second magnetic core subassembly 140, supply the coil winding of different grade type on the circuit board respectively to wind and establish, realized will originally discrete magnetism device integrated together, can effectively reduce the volume of magnetic core and magnetism integrated device, reduction in production cost. Wherein the first magnetic core assembly 110 comprises the first magnetic core part 120 and the second magnetic core part 130 which form a continuous closed ring shape, so that the first magnetic core assembly 110 forms a closed magnetic circuit, and the second magnetic core assembly 140 forms a first closed magnetic circuit with the first magnetic core part 120 through the third magnetic core part 141 and the fourth magnetic core part 142, it can be seen that the first magnetic core assembly 110 and the second magnetic core assembly 140 share the first magnetic core part 120 to form a closed magnetic circuit, so that the volumes of the magnetic core and the magnetic device using the magnetic core can be further reduced, and the wiring design of the electric control circuit board and the miniaturization design of the electric control circuit board and the electric control box are facilitated. In addition, the first magnetic core assembly 110 and the second magnetic core assembly 140 are made of magnetic core materials with different magnetic conductivities, and a continuous closed ring shape is formed among the third magnetic core part 141, the fourth magnetic core part 142 and the second magnetic core part 130 of the second magnetic core assembly 140, so that the first magnetic core assembly 110, the second magnetic core assembly 140 and the whole magnetic core do not have an air gap with an obvious opening, the magnetic leakage phenomenon of the magnetic core can be greatly reduced, and the first magnetic core assembly 110 and the second magnetic core assembly 140 are made of the magnetic core materials with different magnetic conductivities, so the magnetic core materials for making up the first magnetic core assembly 110 and the second magnetic core assembly 140 can be selected according to the winding type of an actual winding, the performance requirement of a magnetic integrated device can be met, meanwhile, magnetic interference on the periphery can not be generated, the structure is simple, and the assembly and the production are convenient.
It should also be appreciated that the various embodiments provided by the embodiments of the present invention can be combined arbitrarily to achieve different technical effects.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (11)
1. A magnetic core, comprising:
the first magnetic core assembly comprises a first magnetic core part and a second magnetic core part, and a continuous closed ring shape is formed between the first magnetic core part and the second magnetic core part;
a second magnetic core assembly located above the first magnetic core assembly, the second magnetic core assembly including a third magnetic core portion and fourth magnetic core portions disposed on both sides of the third magnetic core portion, the fourth magnetic core portion, and the first magnetic core portion forming a first closed magnetic path therebetween; the third magnetic core part, the fourth magnetic core part and the second magnetic core part form a continuous closed ring shape;
the first magnetic core component and the second magnetic core component are made of magnetic core materials with different magnetic permeability.
2. A magnetic core according to claim 1, wherein the second magnetic core assembly further comprises a first leg, one end of the first leg being connected to the third magnetic core portion and the other end being connected to the first magnetic core portion.
3. A magnetic core according to claim 1, wherein the second magnetic core portion includes a first side pillar and a second side pillar disposed at two sides thereof, the second magnetic core portion further includes a third side pillar parallel to the first magnetic core portion, and two ends of the third side pillar are respectively connected to the first side pillar and the second side pillar; the first magnetic core assembly further comprises a second center pillar, and two ends of the second center pillar are connected with the first magnetic core portion and the third pillar respectively.
4. A magnetic core according to claim 1, wherein the second magnetic core assembly further comprises a first center leg, one end of the first center leg being connected to the third magnetic core portion and the other end being connected to the first magnetic core portion;
the second magnetic core part comprises a first side column and a second side column which are arranged on two sides of the second magnetic core part, the second magnetic core part further comprises a third side column which is parallel to the first magnetic core part, and two ends of the third side column are respectively connected with the first side column and the second side column; the first magnetic core assembly further comprises a second center pillar, and two ends of the second center pillar are connected with the first magnetic core portion and the third pillar respectively.
5. A magnetic core according to any of claims 1-4, characterized in that the magnetic permeability of the first magnetic core component is higher than the magnetic permeability of the second magnetic core component.
6. A magnetic core according to any of claims 1 to 4, characterized in that the second core assembly is made of a magnetic powder core-like material.
7. A magnetic core according to any of claims 1 to 4, wherein the second core component is any of a ferrite core, a sendust core, a molypermalloy core or a sendust core.
8. A magnetic core according to any of claims 1 to 4, wherein the first magnetic core component is any one of a ferrite magnetic core, a permanent magnetic alloy magnetic core, an amorphous alloy magnetic core or a silicon steel sheet magnetic core.
9. A magnetically integrated device comprising the magnetic core of any one of claims 1 to 8, further comprising a first winding wound around a first core component of the magnetic core and a second winding wound around a second core component of the magnetic core.
10. A wiring board comprising the magnetically integrated device of claim 9.
11. A household appliance comprising the wiring board of claim 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022316943.9U CN212847924U (en) | 2020-10-16 | 2020-10-16 | Magnetic core, magnetic integrated device and circuit board, domestic appliance thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022316943.9U CN212847924U (en) | 2020-10-16 | 2020-10-16 | Magnetic core, magnetic integrated device and circuit board, domestic appliance thereof |
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| CN212847924U true CN212847924U (en) | 2021-03-30 |
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| CN202022316943.9U Active CN212847924U (en) | 2020-10-16 | 2020-10-16 | Magnetic core, magnetic integrated device and circuit board, domestic appliance thereof |
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