Annular inductor and electronic equipment

Abstract

The utility model provides an annular inductor which comprises an annular iron core and a winding wire, the annular iron core forms an inner ring and a peripheral ring, the winding wire surrounds the inner ring and the peripheral ring to form an annular coil for winding, and the width of the winding wire close to one side of the annular iron core is smaller than that of the winding wire far away from one side of the annular iron core. According to the annular inductor provided by the utility model, the coil winding structure is improved, the inversion problem that the temperature rise of a finished product is influenced due to the fact that the coil is too high can be solved, and the winding resistance can be reduced and the temperature rise of the product can be effectively controlled on the premise of not changing the size of the magnetic ring.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic devices, in particular to a toroidal inductor and electronic equipment. Background Art

[0002] In the prior art, the winding structure used by the toroidal inductor is based on Figure 1 Its characteristics are: the overall structure width of the winding is uniform, as shown in the figure, the two ends of the winding are of equal width.

[0003] The toroidal inductor in the prior art has the following deficiencies: the radial dimension of the outer ring of the core is larger than the radial dimension of the inner ring of the core. Since the winding width is uniform, after being wound on the toroidal core, the inner ring winding is wound more tightly than the outer ring winding. The closer to the center of the inner ring of the core, the tighter the winding coils in adjacent layers are. Utility Model Content

[0004] The utility model aims to solve one of the above-mentioned technical problems, improve the structure of the winding of the toroidal inductor, and provide a toroidal inductor.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A toroidal inductor comprises an annular core and a winding wire, wherein the annular core forms an inner ring and an outer ring, and the winding wire surrounds the inner ring and the outer ring to form an annular coil, wherein the width of the winding wire close to one side of the annular core is smaller than the width of the winding wire away from the annular core.

[0007] In some embodiments of the utility model, the winding is flat, and based on the state of the winding being wound around the iron core, the winding includes a height direction segment and a width direction segment, the first end of the width direction segment is close to the annular iron core, the second end of the width direction segment is opposite to the first end of the width direction segment, and the width of the second end of the width direction segment is reduced relative to the first end of the width direction segment.

[0008] In some embodiments of the present invention, both sides of the winding are symmetrically contracted from the first end of the width direction segment to the second end of the width direction segment, so that the width of the second end of the width direction segment is reduced relative to the first end of the width direction segment.

[0009] In some embodiments of the utility model, from the first end of the winding width direction segment to the second end of the winding width direction segment, the winding includes a straight segment and a variable diameter segment, and the width of the variable diameter segment is smaller than the width of the straight segment.

[0010] In some embodiments of the utility model, two sides of the diameter-changing section shrink symmetrically.

[0011] In some embodiments of the present invention, the end of the winding away from the annular core is arc-shaped.

[0012] In some embodiments of the present invention, the winding material is copper.

[0013] An electronic device, characterized by comprising the toroidal inductor mentioned above.

[0014] Compared with the prior art, the toroidal inductor provided by the utility model has the following technical advantages:

[0015] 1. The coil winding structure has been improved, which can solve the inversion problem caused by the excessive height of the coil affecting the temperature rise of the finished product. Under the premise of not changing the size of the magnetic ring, the spacing between adjacent layers of windings can be increased under the same number of windings, thereby reducing the winding resistance and effectively controlling the temperature rise of the product.

[0016] 2. After changing the winding design, for the same size of toroidal core, the number of winding turns can be increased, thereby improving the load capacity of the inductor and increasing the power of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of the winding structure of the prior art;

[0019] Figure 2 This is a schematic diagram of the local structure of the winding of this application;

[0020] Figure 3 This is a schematic diagram of the dimensions of each part of the local structure of the winding of this application;

[0021] Figure 4 This is a schematic diagram of the separation state of the toroidal inductor coil 1 and coil 2 of the present application;

[0022] Figure 5 This is a schematic diagram of the structure of the toroidal inductor in the winding state from the first perspective of the present application;

[0023] Figure 6 This is a schematic diagram of the structure of the toroidal inductor in the winding state from the second perspective of the present application;

[0024] In the above figures:

[0025] 1- iron core, 101- inner ring, 102- outer ring;

[0026] 2-winding, 201-height direction section, 202-width direction section, 203-straight section, 204-diameter reducing section, 205-arc section;

[0027] 301-coil one, 302-coil two. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] It should be noted that when an element is referred to as being "disposed on", "connected to", another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0030] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] The terms "first" and "second" are used for descriptive purposes only and are not used to imply relative importance.

[0032] The first embodiment of the utility model provides a toroidal inductor, including a toroidal core 1 and a winding 2, wherein the toroidal core forms an inner ring 101 and an outer ring 102, and the winding 2 surrounds the inner ring 101 and the outer ring 102 to form a toroidal coil. The winding is preferably made of copper, including a coil 1 301 and a coil 2 302, which are used as an input line and an output line respectively.

[0033] The present invention improves the structure of the winding, and the width of the winding close to the annular core is smaller than the width of the winding away from the annular core. This structure makes the width of the winding on the side of the inner ring 101 of the core close to the center of the inner diameter of the core narrower. Compared with the straight coil winding in the prior art, under the same winding density and winding gap, the interference between adjacent coils close to the center of the inner diameter of the core will be reduced, thereby improving the density of the winding.

[0034] As a specific implementation structure, the winding is flat, based on the state of the winding being wound on the iron core 1, the winding includes a height section 201 and a width section 202, the first end of the width section 202 is close to the annular iron core 1, the second end of the width section 202 is opposite to the first end of the width section 202, and the second end of the width section 202 is narrower in width than the first end of the width section 202. After the winding is wound on the iron core 1, the second end of the width section 202 is located at an end close to the inner diameter of the iron core 1. Since the width of this end is small, the interference between adjacent winding layers is reduced, the number of winding turns is increased, or the winding pitch is reduced.

[0035] In some embodiments of the present invention, the two sides of the winding are symmetrically contracted from the first end of the width section 202 to the second end of the width section 202, so that the second end of the width section 202 is narrower than the first end of the width section. This structure can make the two sides of the winding contract evenly, further improve the interference between the contact surfaces on both sides of the adjacent layers of windings, increase the number of windings, or reduce the winding pitch.

[0036] As a specific implementation structure, from the first end of the winding width direction section 202 to the second end of the winding width direction section 202 (i.e., the length direction of the winding longitudinal cross section), the winding includes a straight section 203 and a diameter-changing section 204, and the width of the diameter-changing section is smaller than the width of the straight section. In some embodiments of the utility model, the two sides of the diameter-changing section are symmetrically contracted.

[0037] In the above implementation structure, the end of the winding away from the annular core is arc-shaped, that is, the end of the reduced diameter section 204 is an arc section 205 .

[0038] refer to Figure 2 The structure diagram of the cashing-out copper wire used in the utility model is shown.

[0039] The base width a of the winding copper wire is 2 mm, the overall height b is 8 mm, the minimum width a1 of the reduced diameter section is 1.3 mm, the length b1 of the reduced diameter section is 3.5 mm, and the thickness (not visible in the plan view) is 2 mm.

[0040] The above dimensions can be modified according to the specific design of the product.

[0041] The second embodiment of the utility model provides an electronic device, which can be used for photovoltaic equipment, energy storage equipment, etc. The electronic device includes the toroidal inductor provided in the first embodiment above. The electronic device can be: a transformer, a reactor, an inverter, etc.

[0042] The technical effects of the toroidal inductor product obtained by adopting the winding technical solution of the utility model and the winding technical solution of the prior art are compared as follows.

[0043] Comparative Example 1:

[0044] Initially, the inductor coil is made of 2mm*8mm*2P copper wire, which is wound vertically with 24TS (i.e., 24 turns), wrapping around the entire inner hole of the iron core 1. The inductor load requirement is 30uH Min@DC=150A.

[0045] After the change, the inductor coil uses T1.3*2mm*8mm*2P flat copper wire, which is wound vertically 28TS (i.e. 28 turns), wrapping the entire inner hole of the magnetic ring. The inductor load requirement is 30uH Min@DC=180A.

[0046] Without changing the size of the magnetic core and the material of the magnetic core, the design of the copper wire is changed and the number of winding turns is increased, thereby improving the load capacity of the inductor and the efficiency of the whole machine. For example, the inverter inductor can be increased from 100KW to 105KW. The increased inductance load capacity meets the requirements for improving the efficiency of the whole machine.

[0047] Comparative Example 2:

[0048] Initially, the inductor coil was made of 1.5mm*7mm*2P flat copper wire wound vertically with 30TS, just wrapping around the entire inner hole of the magnetic ring. The copper wire resistance was 5.9mΩ.

[0049] After the change, the inductor coil uses T1.3*2mm*8mm*2P flat copper wire wound vertically with 30TS, which just wraps around the entire inner hole of the magnetic ring. The copper wire resistance is 4.7mΩ.

[0050] Without changing the size of the magnetic core, the material of the magnetic core and the number of winding turns, the copper resistance is reduced from 5.9mΩ to 4.7mΩ after changing the design of the copper wire, thereby reducing the temperature rise of the whole product from 155 degrees to 125 degrees, which meets the customer's overall environmental requirements.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A toroidal inductor, characterized in that: It includes an annular iron core and a winding wire, wherein the annular iron core forms an inner ring and an outer ring, and the winding wire surrounds the inner ring and the outer ring to form an annular coil, and the width of the winding wire close to one side of the annular iron core is smaller than the width of the winding wire away from the annular iron core.

2. The toroidal inductor according to claim 1, characterized in that: The winding is flat and is based on the state of the winding being wound around the iron core. The winding includes a height section and a width section. The first end of the width section is close to the annular iron core, and the second end of the width section is opposite to the first end of the width section. The width of the second end of the width section is reduced relative to the first end of the width section.

3. The toroidal inductor according to claim 2, characterized in that: From the first end of the width direction segment to the second end of the width direction segment, the two sides of the winding are symmetrically contracted, so that the width of the second end of the width direction segment is reduced relative to the first end of the width direction segment.

4. The toroidal inductor according to claim 2, characterized in that: From the first end of the winding width direction segment to the second end of the winding width direction segment, the winding includes a straight segment and a diameter-changing segment, and the width of the diameter-changing segment is smaller than the width of the straight segment.

5. The toroidal inductor according to claim 4, characterized in that: The two sides of the diameter-changing section are symmetrically contracted.

6. The toroidal inductor according to any one of claims 1 to 5, characterized in that: The end of the winding away from the annular core is arc-shaped.

7. The toroidal inductor according to claim 1, characterized in that: The winding material is copper.

8. An electronic device, characterized in that: A toroidal inductor comprising the toroidal inductor as claimed in any one of claims 1 to 7.

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