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Inductive element and buffer circuit using said inductive element

A technology of inductive components and closed magnetic circuit, applied in electrical components, transformer/inductor components, circuits, etc., can solve the problems of increased manufacturing cost of inductive components, low operation efficiency, difficulty in winding automation, etc. Work efficiency, good inductance characteristics, and the effect of easy winding process

Inactive Publication Date: 2004-09-29
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low work efficiency of winding on the toroidal core
And winding automation is difficult, so the manufacturing cost of the inductance element increases
In addition, the use of resin coating or resin casings to impart strength against winding wires has become a major cause of increased manufacturing costs for inductance elements.

Method used

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  • Inductive element and buffer circuit using said inductive element
  • Inductive element and buffer circuit using said inductive element
  • Inductive element and buffer circuit using said inductive element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4、 comparative example 1～4

[0105] First, as figure 1 The bobbin 1 shown has a rectangular shape with a height of 15 mm, a width of 6 mm, and a depth of 1.5 mm, and is prepared as a member made of liquid crystal resin (liquid crystal polymer). The opening 2 a of the bobbin 1 has a shape of 5×0.3 mm and a hollow portion 2 with a depth of 14 mm. In addition, two conductors with a square cross section of 0.6 mm coated with solder are press-fitted as lead terminals 7 on the end surface of the bobbin 1 on the side opposite to the opening 2 a. The pitch of the lead terminals 7 is 7.62mm so that they can be inserted into a normal circuit board.

[0106] A polyurethane wire with a diameter of 0.1 mm is wound on the bobbin 1 with 50 turns (Example 1), 100 turns (Example 2), 200 turns (Example 3), and 100 turns (Example 4). into winding 3. The winding length Lw of the coil 4 is set to a constant value of 12 mm. The winding 3 of 200 turns is made to turn back halfway. Since these winding wires 3 are wound by r...

Embodiment 5～9、 comparative example 5～6

[0117] First, as Figure 4 The bobbin 10 shown has a rectangular shape with a height of 13 mm, a width of 6 mm, and a depth of 1.5 mm, and is prepared from a liquid crystal resin (liquid crystal polymer). The coil bobbin 10 has a hollow portion 11 with a rectangular section of 5×0.3 mm open at both ends. In addition, two solder-coated conductors with a square cross-section of 0.6 mm are pressed into the lower surface of the bobbin 10 as lead terminals 7 . The pitch of the lead terminals 7 is 7.62 mm so that it can be inserted into a normal circuit board.

[0118] On the above-mentioned bobbin 10, the polyurethane wires with a diameter of 0.1mm are respectively divided into 50 turns (embodiment 5), 100 turns (embodiment 6), 200 turns (embodiment 7), 100 turns (embodiment 8), 100 turns (Example 9) are wound into winding 3 . The winding length Lw of the coil 4 of Example 5 was set to 8 mm. The winding length Lw of the coil 4 of Examples 6-9 was set to 12 mm, respectively. Th...

Embodiment 10

[0129]On the same bobbin 10 as in Example 5, a polyurethane wire with a diameter of 0.1 mm was wound with 150 turns to form a winding. The winding length Lw of the coil 4 was set to 12 mm. Both ends of the winding are stripped of the coating and soldered to 2 lead terminals respectively. Next, a Co-based amorphous alloy thin ribbon having a thickness of 18 μm, a width of 4.5 mm, and a length of 26 mm was prepared as a magnetic thin ribbon, and used as a single layer. This Co-based amorphous alloy ribbon was inserted through the hollow portion, formed into a ring shape, and both ends of the alloy ribbon were laminated, and the laminated portion was fixed with an adhesive tape. Then, move the connection part into the hollow part of the bobbin.

[0130] In sample 1, the length of the connecting portion (the length of the overlapping portion) Lg was set to 4 mm, and the average magnetic path length Lc was set to 27 mm. The length Lg of this connecting portion is 15% of the aver...

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Abstract

The present invention relates to an inductance element and the manufacturing method thereof. A winding having 20-500 turns(N)per length of 10 mm is formed around a cylindrical bobbin having a hollow, thereby constituting a coil, and a single or a plurality of layers of magnetic tapes with a thickness of 4-50 um and a width of 2-40 mm are inserted and settled in the hollows of the bobbi. A ratio of the number of turns per 10 mm to the number of layers of the magnetic tapes is set at 20-500. The magnetic tapes are disposed in the hollow of the coil, to form an open magnetic path structure or a closed magnetic path loop. The inductance element can be used as a saturable inductor and the like with excellent inductance characteristics, high work efficiency and low manufacture cost.

Description

technical field [0001] The present invention relates to an inductance element used in a snubber circuit and a delay element of a switching power supply, and a snubber circuit using the inductance element. Background technique [0002] Inductive elements are used in various circuits. For example, in a switching power supply such as an RCC system, an inductance element (saturable inductor) can be used as a current delay element for delaying a gate signal of a MOS-FET as a switching element. This current delay element is an element in which a snubber capacitor functions as a resonant capacitor and a MOS-FET functions as a zero-voltage switch. [0003] As a conventional inductance element, for example, an element having an annular core formed by winding or laminating soft magnetic alloy thin strips is mainly used. When such an inductance element is applied to the above-mentioned current delay element, predetermined characteristics are obtained by winding a covered lead wire mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/153H01F17/04H01F27/00H01F27/24H01F27/245H01F27/28H01F27/29H01F37/00H01F41/04
CPCH01F37/00H01F17/04H01F27/00
Inventor 斋藤忠雄森谷泰明酒井和美日下隆夫
Owner KK TOSHIBA
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