Combined single-phase flat wire vertical winding differential-mode and common-mode integrated inductor
By designing a combined single-phase flat-wire vertically wound differential common-mode integrated inductor, the problems of large leakage inductance attenuation and poor anti-saturation capability are solved, achieving high-frequency miniaturization and low copper loss of inductor performance, which is suitable for electromagnetic interference suppression.
Patent Information
- Application Number
- CN202422914709.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-28
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-11-28
AI Technical Summary
Existing technologies suffer from large leakage inductance attenuation and poor anti-saturation capability, resulting in poor electromagnetic interference suppression and increased circuit space and cost.
By designing a combined single-phase flat wire vertically wound differential and common-mode integrated inductor, including a mounting base, a common-mode magnetic core, a first differential-mode magnetic core, a winding coil, and a second differential-mode magnetic core, flat copper wire vertical winding is adopted. The common-mode magnetic core and the first differential-mode magnetic core share the same coil, realizing the integration of common-mode and differential-mode performance, reducing copper loss and volume, and enhancing anti-saturation capability.
It integrates the performance of differential-mode and common-mode inductors, reduces inductor size and weight, lowers copper losses, and improves anti-saturation capability, making it suitable for high-frequency miniaturized circuits.
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Figure CN223728583U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of electronic components, more specifically, relate to a combined single-phase flat wire vertical winding differential common mode integrated inductance. BACKGROUND
[0002] With the switch power supply switch frequency rising, its electromagnetic interference (EMI) signal also increasingly enhanced. In order to effectively suppress the electromagnetic noise of switch power supply to the outside world and resist the external electromagnetic interference, satisfy electromagnetic compatibility (EMC) requirement, must add common mode and differential mode inductance in the AC input end of switch power supply and carry out suppression.
[0003] Common mode inductance design is unique, has two windings, and the two windings flow in opposite directions along the coil core wire when conducting. In ideal state, the magnetic field generated by two windings will offset each other. However, due to the possibility of winding ring not being able to wind a complete circle, or the tightness between windings is insufficient, the magnetic field will leak. After winding, it cannot be ensured that all magnetic flux is concentrated in the center of the coil, and the inductance generated by the magnetic field leakage is called leakage inductance. In fact, leakage inductance also has the characteristics of differential mode inductance. Therefore, ordinary inductors usually have certain differential mode interference attenuation capability, can suppress differential mode current, equivalent to simultaneously having the functions of differential mode inductance and common mode inductance, thereby realizing more excellent filtering effect.
[0004] At present, products are developing towards high frequency, miniaturization and high performance. The traditional scheme mostly adds ferrite or magnetic powder core magnetic block between two windings to improve the leakage inductance value. However, due to the low permeability of the magnetic powder core, the improvement effect is relatively limited. In addition, when using the function direct current superposition test instrument to simulate the leakage inductance value under the direct current condition, it is found that the anti-saturation ability is poor, which leads to the deviation between the static leakage inductance differential mode inductance and the actual application. At present, there is no effective breakthrough method for this problem. The common method is to additionally increase differential mode inductance in the circuit to filter out differential mode interference, but this method will occupy more space and increase the cost of the whole machine.
[0005] In view of the above problems existing in the prior art, the utility model provides a combined single-phase flat wire vertical winding differential common mode integrated inductance. Utility model content
[0006] In view of the above problems existing in the prior art, the utility model provides a combined single-phase flat wire vertical winding differential common mode integrated inductance.
[0007] The purpose of the utility model can be realized by the following technical schemes:
[0008] The utility model provides a kind of integrated inductance of single-phase flat wire combination type standing winding differential mode common mode, including mounting base, common mode magnetic core, first differential mode magnetic core, winding coil and second differential mode magnetic core, the center of the upper end surface of the mounting base is provided with the common mode magnetic core, the front and rear center of the left part and right part of the common mode magnetic core are all provided with a first differential mode magnetic core, the left part and right part of the common mode magnetic core and the first differential mode magnetic core being arranged in the front and rear center of the left part and right part of the common mode magnetic core are all wound with the winding coil, the left part of the common mode magnetic core and the first differential mode magnetic core of the front and rear left part are shared with a winding coil, the right part of the common mode magnetic core and the first differential mode magnetic core of the front and rear right part are shared with a winding coil, the two end pins of the winding coil are all inserted on the mounting base, the center of the common mode magnetic core is provided with a second differential mode magnetic core.
[0009] As a further preferred technical solution of the utility model, the outer shape of the mounting base is rectangular, the cross section of the mounting base is similar to inverted "N" shape, a rectangular jack hole for inserting the two end pins of the winding coil is formed on the upper end surface of the mounting base, and a long strip-shaped support leg is arranged at the left end and the right end of the bottom surface of the mounting base.
[0010] As a further preferred technical solution of the utility model, the overall shape of the common mode magnetic core is "O" shape, a clamping structure for arranging the second differential mode magnetic core is arranged at the center through hole of the common mode magnetic core, the clamping structure includes an upper clamping position and a lower clamping position, the upper clamping position is arranged at the upper wall of the center through hole of the common mode magnetic core, the lower clamping position is arranged at the upper wall of the center through hole of the common mode magnetic core and corresponds to the upper clamping position, the upper clamping position and the lower clamping position are both a pair of strip-shaped bodies, and a certain gap for clamping the second differential mode magnetic core is arranged between the pair of strip-shaped bodies of the upper clamping position and the lower clamping position.
[0011] As a further preferred technical solution of the utility model, the front and rear of the left part and the right part of the common mode magnetic core are both provided with a shell limiting structure for arranging the first differential mode magnetic core, the shell limiting structure includes a limiting part and a shell part, the limiting part is a rectangular groove penetrating from the upper side of the common mode magnetic core to the shell part, the outer shape of the shell part is "U" shape, and a rectangular through hole for arranging the first differential mode magnetic core is formed on the shell part.
[0012] As a further preferred technical solution of the utility model, the winding coil is vertically wound by using flat copper wire, the coil shape of the winding coil is circular, and uniform air ducts are reserved between each turn of the winding coil.
[0013] As a further preferred technical scheme of the utility model, the overall shape of the first differential mode magnetic core is a strip shape, and the cross section of the first differential mode magnetic core is a rectangle shape.
[0014] The overall shape of the second differential mode magnetic core is a block shape, and the cross section of the second differential mode magnetic core is a rectangle shape.
[0015] The first differential mode magnetic core and the second differential mode magnetic core are integrally made of amorphous, silicon steel, magnetic powder core, nickel core or ferrite material.
[0016] As a further preferred technical scheme of the utility model, the common mode magnetic core is integrally made of nanocrystalline or high-conductivity ferrite material.
[0017] The common mode magnetic core and the mounting base are fixed by epoxy resin glue.
[0018] As a further preferred technical scheme of the utility model, the mounting base is integrally made of epoxy resin and / or FR-4 of insulating material or integrally made of hard rubber of anti-static material.
[0019] As described above, the utility model provides a combined single-phase flat wire vertical-wound differential common mode integrated inductor, which has the following beneficial effects:
[0020] Compared with the prior art, the common mode magnetic core and the first differential mode magnetic core use a common coil, thereby realizing reduction of copper loss, reduction of the overall inductor volume, realization of a kind of inductor with differential common mode performance, realization of weight reduction, low copper loss advantage, and the magnetic circuit of the magnetic core is not closed, the magnetic circuit of the magnetic core needs to pass through a long air section, the air magnetic resistance is too large, the energy density is high, the air magnetic circuit is not easy to saturate, and even can be used under the condition of large current, which breaks through the shortcomings of poor anti-saturation capability, low differential mode inductance and easy saturation of the magnetic core in the prior art.
[0021] Additional aspects and advantages of the utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying the creativity of labor.
[0023] Figure 1The structure schematic diagram of a combined single-phase flat wire vertical-wound differential common-mode integrated inductor is applied to the utility model.
[0024] Figure 2 The structure schematic diagram of a common-mode magnetic core of a combined single-phase flat wire vertical-wound differential common-mode integrated inductor is applied to the utility model.
[0025] Figure 3 The structure schematic diagram of a mounting base of a combined single-phase flat wire vertical-wound differential common-mode integrated inductor is applied to the utility model.
[0026] The figure mark and its explanation summary:
[0027] 100, mounting base; 110, jack; 120, supporting leg; 200, common-mode magnetic core; 210, clamping structure; 211, upper clamping position; 212, lower clamping position; 220, shell limiting; 221, limiting part; 222, shell part; 300, first differential-mode magnetic core; 400, winding coil; 500, second differential-mode magnetic core. Specific implementation
[0028] The implementation of the utility model is explained by specific embodiments below, and other advantages and effects of the utility model can be easily understood by those skilled in the art from the content disclosed in the specification.
[0029] It should be understood that the structure, proportion, size, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the utility model, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be produced and achieved by the utility model, should still fall within the scope covered by the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" in the specification are only for clear description, and are not used to limit the implementation range of the utility model. The change or adjustment of relative relationship, without substantial change of technical content, is also considered as the implementation scope of the utility model. The specific structure can be explained with reference to the drawings of the patent application.
[0030] The utility model provides a combined single-phase flat wire vertical-wound differential common-mode integrated inductor, please refer to Figures 1 to 3As shown, including installation base 100, common mode magnetic core 200, the first differential mode magnetic core 300, winding coil 400 and the second differential mode magnetic core 500, the upper end surface of the installation base 100 is provided with the common mode magnetic core 200, the left and right parts of the common mode magnetic core 200 are provided with the first differential mode magnetic core 300 at the center of the front and back, the left and right parts of the common mode magnetic core 200 and the first differential mode magnetic core 300 provided at the center of the front and back of the left and right parts of the common mode magnetic core 200 are wound with the winding coil 400, the left part of the common mode magnetic core 200 and the first differential mode magnetic core 300 of the front and back of the left part share a winding coil 400, the right part of the common mode magnetic core 200 and the first differential mode magnetic core 300 of the front and back of the right part share a winding coil 400, the two end pins of the winding coil 400 are inserted into the installation base 100, and the center of the common mode magnetic core 200 is provided with the second differential mode magnetic core 500.
[0031] Specifically, the specific structure of the installation base 100 is as follows, combined with Figure 1 and Figure 3 As shown, the outer shape of the installation base 100 is rectangular, the cross section of the installation base 100 is similar to the inverted “N” shape, the upper end surface of the installation base 100 is provided with a rectangular jack 110 for inserting the two end pins of the winding coil 400, the left and right ends of the bottom surface of the installation base 100 are provided with a long strip-shaped support 120, and the installation base 100 is precisely positioned to meet the insertion requirements of the winding coil 400 through the setting of the jack 110.
[0032] Specifically, the specific structure of the common mode magnetic core 200 is as follows, combined with Figure 1 and Figure 2 As shown, the overall shape of the common mode magnetic core 200 is “O” shape, which can increase the distance between the two coils and improve the inductance value, the center through hole of the common mode magnetic core 200 is provided with a clamping structure 210 for installing the second differential mode magnetic core 500, the clamping structure 210 includes an upper clamping position 211 and a lower clamping position 212, the upper clamping position 211 is arranged at the upper wall of the center through hole of the common mode magnetic core 200, the lower clamping position 212 is arranged at the upper wall of the center through hole of the common mode magnetic core 200 and corresponds to the upper clamping position, the upper clamping position 211 and the lower clamping position 212 are a pair of strip-shaped bodies, a certain gap for clamping the second differential mode magnetic core 500 is arranged between the pair of strip-shaped bodies of the upper clamping position 211 and the lower clamping position 212, and the common mode magnetic core 200 can precisely limit and fix the second differential mode magnetic core 500 through the setting of the clamping structure 210.
[0033] The front side and the rear side of the left part and the right part of the common mode magnetic core 200 are provided with a shell limiting structure 220 for installing the first differential mode magnetic core 300, the shell limiting structure 220 comprises a limiting part 221 and a shell part 222, the limiting part 221 is a rectangular groove penetrating from the upper side of the common mode magnetic core 200 to the shell part 222, the shell part 222 is in the shape of a "U" letter, and a rectangular through hole is formed in the shell part 222 for installing the first differential mode magnetic core 300, and the common mode magnetic core 200 can accurately limit and fix the first differential mode magnetic core 300 through the shell limiting structure 220.
[0034] The winding coil 400 is vertically wound by using flat copper wire, the winding coil 400 is in the shape of a circle, and uniform air channels are reserved between each turn of the winding coil 400, which is beneficial to heat dissipation of the coil and ensures consistency of inductance performance.
[0035] The first differential mode magnetic core 300 is in the shape of a long strip, and the cross section of the first differential mode magnetic core 300 is in the shape of a rectangle; the second differential mode magnetic core 500 is in the shape of a block, and the cross section of the second differential mode magnetic core 500 is in the shape of a rectangle; the first differential mode magnetic core 300 and the second differential mode magnetic core 500 are an integral piece made of amorphous, silicon steel, magnetic powder core, nickel core or ferrite material.
[0036] The common mode magnetic core 200 is an integral piece made of nanocrystalline or high-conductivity ferrite material;
[0037] The common mode magnetic core 200 and the mounting base 100 are fixed by epoxy resin glue.
[0038] The mounting base 100 is an integral piece made of epoxy resin and / or FR-4 of insulating material or an integral piece made of hard rubber of anti-static material.
[0039] It should be noted that the common mode magnetic core 200 and the first differential mode magnetic core 300 use a common coil, thereby realizing reduction of copper loss, reduction of the volume of the whole inductor, realization of an inductor with differential mode and common mode performance, realization of weight reduction and low copper loss, and that the magnetic circuit of the magnetic core is not closed, the magnetic circuit of the magnetic core needs to pass through a long air gap, the air magnetic resistance is too large, the energy density is high, the air magnetic circuit is not easy to saturate, and even the inductor can be used under a large current condition, thereby breaking through the shortcomings of poor anti-saturation capability, low differential mode inductance and easy saturation of the magnetic core in the prior art.
[0040] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.
Claims
1. A combined single-phase flat wire vertical-wound differential common-mode integrated inductor, characterized in that, The installation base, the common mode magnetic core, the first differential mode magnetic core, the winding coil and the second differential mode magnetic core, the upper end surface of the installation base is provided with the common mode magnetic core, the front and rear sides of the left and right parts of the common mode magnetic core are provided with the first differential mode magnetic core, the left and right parts of the common mode magnetic core and the first differential mode magnetic core provided on the front and rear sides of the left and right parts of the common mode magnetic core are wound with the winding coil, the left part of the common mode magnetic core and the first differential mode magnetic core on the front and rear sides of the left part share a winding coil, the right part of the common mode magnetic core and the first differential mode magnetic core on the front and rear sides of the right part share a winding coil, the two end pins of the winding coil are inserted into the installation base, and the center of the common mode magnetic core is provided with the second differential mode magnetic core.
2. The integrated differential common-mode inductor of claim 1, wherein, The outer shape of the installation base is rectangular, the cross section of the installation base is similar to the inverted "N" shape, the upper end surface of the installation base is provided with a rectangular jack hole for inserting the two end pins of the winding coil, and the bottom surface of the installation base is provided with a long strip-shaped support on the left and right ends.
3. The integrated differential common-mode inductor of claim 1, wherein, The overall shape of the common mode magnetic core is "O" shape, the center through hole of the common mode magnetic core is provided with a clamping structure for installing the second differential mode magnetic core, the clamping structure includes an upper clamping position and a lower clamping position, the upper clamping position is arranged on the upper wall of the center through hole of the common mode magnetic core, the lower clamping position is arranged on the upper wall of the center through hole of the common mode magnetic core and corresponds to the upper clamping position, the upper clamping position and the lower clamping position are a pair of strip-shaped bodies, and a certain gap for clamping the second differential mode magnetic core is arranged between the pair of strip-shaped bodies of the upper clamping position and the lower clamping position.
4. The integrated differential common-mode inductor of claim 3, wherein, The front and rear sides of the left and right parts of the common mode magnetic core are provided with a shell limiting structure for installing the first differential mode magnetic core, the shell limiting structure includes a limiting part and a shell part, the limiting part is a rectangular groove penetrating from the upper side of the common mode magnetic core to the shell part, the shell part has a "U" shape, and the shell part is provided with a rectangular through hole for arranging the first differential mode magnetic core.
5. The integrated differential common-mode inductor of claim 1, wherein, The winding coil is made of flat copper wire and is vertically wound, the winding coil has a circular shape, and uniform air channels are reserved between each turn of the winding coil.
6. A combined single-phase flat wire standing difference common-mode integrated inductor according to any one of claims 1 to 5, characterized in that, The overall shape of the first differential mode magnetic core is a long strip, and the cross section of the first differential mode magnetic core is rectangular. The overall shape of the second differential mode magnetic core is a block, and the cross section of the second differential mode magnetic core is rectangular. The first differential mode magnetic core and the second differential mode magnetic core are made of amorphous, silicon steel, magnetic powder core, nickel core or ferrite material.
7. A combined single-phase flat wire vertical-wound differential common-mode integrated inductor according to any one of claims 1 to 5, characterized in that, The common mode magnetic core is made of nanocrystalline or high-conductivity ferrite material. The common mode magnetic core and the installation base are fixed by epoxy resin.