CN214099366U - Compact switching power supply output inductance coil - Google Patents

Abstract

A compact type switching power supply output inductance coil comprises a magnetic ring assembly, wherein the magnetic ring assembly comprises a magnetic ring, a first winding, a second winding and a third winding, the first winding, the second winding and the third winding are wound on the outer wall of the magnetic ring, the first winding, the second winding and the third winding are distributed annularly and arranged at intervals, the first winding and the second winding are arranged oppositely to form a first inductor, and the first winding and the third winding are arranged oppositely to form a second inductor; the first winding and the third winding are of clockwise winding structures, the second winding is of an anticlockwise winding structure, and the winding turns between the first winding and the third winding are the same; the utility model can realize the rationalization and the maximum utilization of the sectional area of the magnetic ring, the utilization rate of the unit winding space is highest, and a smaller magnetic ring can wind more coils; the energy storage effect of the magnetic ring is better enhanced.

Description

Compact switching power supply output inductance coil

Technical Field

The utility model belongs to the technical field of switching power supply, in particular to compact switching power supply output inductance coils.

Background

The iron powder core material is a specially processed material, and the magnetic powder core is formed by fine particles of milled iron powder and other alloy and insulating material coating. The insulating particles surrounding the iron powder particles form the internal dispersed air gaps of the iron powder core. The energy transfer is hidden in this evenly distributed air gap. The real choke coil can be formed only by winding the coil on the magnetic ring of the iron powder core material, so that the functions of conversion and energy storage are achieved. The switch power supply uses the inductor choking coil of the type, and the winding method and the winding process determine the performance of the inductor.

There are generally two winding methods, a single layer winding method and a multi-layer winding method. Respectively good and bad. The single-layer winding method comprises the following steps: uniformly distributing the enameled wires on the cylindrical surface of the annular iron powder core in a single layer. The single-layer winding method includes intermittent winding and close winding, and the intermittent winding method is adopted for high-frequency inductance coils. The winding method reduces the inherent capacitance of the inductance coil, has higher quality factor and stability, but the uniform winding occupies large area of the magnetic ring, and the start and the end are easy to collide with each other. A short circuit is easily caused. The multilayer winding method is that the enameled wires are tightly arranged on the cylindrical surface of the annular iron powder core layer by layer, and the winding area is saved by the laminating mode. The problem of short circuit is not easily caused, but the quality factor and stability are poor. And the inductor works abnormally and the temperature rise is abnormal when the power supply is continuously output.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists provides a compact switching power supply output inductance coil, and concrete technical scheme is as follows:

a compact type switching power supply output inductance coil comprises a magnetic ring assembly, wherein the magnetic ring assembly comprises a magnetic ring, a first winding, a second winding and a third winding, the first winding, the second winding and the third winding are wound on the outer wall of the magnetic ring, the first winding, the second winding and the third winding are distributed annularly and arranged at intervals, the first winding and the second winding are arranged oppositely to form a first inductor, and the first winding and the third winding are arranged oppositely to form a second inductor;

the first winding and the third winding are of clockwise winding structures, the second winding is of an anticlockwise winding structure, and the number of winding turns between the first winding and the third winding is the same.

Further, the coiling one end of first winding is outside extension first outer lead wire, the other end is inside extension first inner lead wire, the coiling one end of second winding is outside extension second outer lead wire, the other end is inside extension second inner lead wire, the coiling one end of third winding is outside extension third outer lead wire, the other end is inside extension third inner lead wire, first outer lead wire, third inner lead wire, second inner lead wire, the second outer lead wire sets up clockwise in proper order.

Furthermore, the first outer lead, the first inner lead, the second outer lead, the second inner lead, the third outer lead and the third inner lead are sleeved with sleeves.

Furthermore, the bottom surface of magnetic ring subassembly is glued and is had the packing ring, a plurality of outer wire holes have been seted up at the outer lane position of packing ring, a plurality of interior line holes have been seted up at the inner circle position of packing ring, first outer lead wire, second outer lead wire and third outer lead wire all run through the outer wire hole relatively, first inner lead wire, second inner lead wire and third inner lead wire all run through the interior line hole relatively.

Further, the surface of packing ring is equipped with three silica gel filling block, and three silica gel filling block is first silica gel point, second silica gel point and third silica gel point respectively, first silica gel point is located the center department of first winding relatively, and second silica gel point is located the center department of second winding relatively, and third silica gel point is located the center department of third winding relatively.

The utility model has the advantages that: through the windings arranged at intervals, the first winding and the third winding are arranged clockwise, and the second winding is arranged anticlockwise, so that the sectional area of the magnetic ring is utilized maximally, the utilization rate of a unit winding space is highest, and more coils can be wound by a smaller magnetic ring; the energy storage effect of the magnetic ring is better enhanced.

Drawings

Fig. 1 shows a schematic structural diagram of an output inductance coil of a compact switching power supply of the present invention;

fig. 2 shows a schematic structural view of the magnetic ring assembly of the present invention;

fig. 3 shows a schematic view of the washer structure of the present invention;

shown in the figure: 1. a magnetic ring assembly; 2. a magnetic ring; 3. a first winding; 31. a first outer lead; 32. a first inner lead; 4. a second winding; 41. a second outer lead; 42. a second inner lead; 5. a third winding; 51. a third outer lead; 52. a third inner lead; 6. a gasket; 61. a silica gel filling block; 62. an outer wire hole; 63. an inner wire hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 and 2, a compact switching power supply output inductance coil includes a magnetic ring assembly 1, where the magnetic ring assembly 1 includes a magnetic ring 2, a first winding 3, a second winding 4, and a third winding 5, the first winding 3, the second winding 4, and the third winding 5 are wound around an outer wall of the magnetic ring 2, the first winding 3, the second winding 4, and the third winding 5 are distributed annularly and are arranged at intervals, the first winding 3 and the second winding 4 are arranged oppositely to form a first inductance, and the first winding 3 and the third winding 5 are arranged oppositely to form a second inductance;

the winding process of the three windings is as follows: firstly, winding a first winding (1-2) by a back-and-forth winding method, starting to wind from one side of a coil in a clockwise manner, and fully winding the total coil; the winding of the second winding (3-4) needs to be wound from the 1 lead of the first winding in the reverse time direction, the wiring mode adopts a winding mode of five-in and four-out, and the winding is completed by a total coil; then, winding a third winding (5-6) from the lead wire position (2) of the first winding in a clockwise manner, wherein the wiring mode is the same as that of the second winding, and the total number of turns of winding is enough; the wire ends and the wire tails of the windings are ensured not to be collided, the distance between the windings and the inner hole is not less than 3mm, and the distance between the outer ring winding and the windings is not more than 16 mm;

as shown in fig. 1 and 2, the first winding 3 and the third winding 5 are wound clockwise, the second winding 4 is wound counterclockwise, and the number of winding turns between the first winding 3 and the third winding 5 is the same.

As shown in fig. 1 and 2, one winding end of the first winding 3 is a first outer lead 31 extending outward, the other winding end is a first inner lead 32 extending inward, one winding end of the second winding 4 is a second outer lead 41 extending outward, the other winding end is a second inner lead 42 extending inward, one winding end of the third winding 5 is a third outer lead 51 extending outward, the other winding end is a third inner lead 52 extending inward, and the first inner lead 32, the first outer lead 31, the third outer lead 51, the third inner lead 52, the second inner lead 42, and the second outer lead 41 are sequentially and clockwise arranged.

The first outer lead 31, the first inner lead 32, the second outer lead 41, the second inner lead 42, the third outer lead 51 and the third inner lead 52 are sleeved with sleeves.

As shown in fig. 3, a washer 6 is glued to the bottom surface of the magnet ring assembly 1, a plurality of outer wire holes 62 are formed in an outer ring portion of the washer 6, a plurality of inner wire holes 63 are formed in an inner ring portion of the washer 6, the first outer lead 31, the second outer lead 41 and the third outer lead 51 all penetrate through the outer wire holes 62, and the first inner lead 32, the second inner lead 42 and the third inner lead 52 all penetrate through the inner wire holes 63; the inner wire hole and the outer wire hole are used for fixing the lead.

As shown in fig. 3, three silica gel filling blocks 61 are arranged on the surface of the gasket 6, the three silica gel filling blocks 61 are respectively a first silica gel point, a second silica gel point and a third silica gel point, the first silica gel point is relatively located at the center of the first winding 3, the second silica gel point is relatively located at the center of the second winding 4, and the third silica gel point is relatively located at the center of the third winding 5; the gasket and the inductor need to be closely adhered, and after adhesion, the silica gel cannot overflow the outer edge of the gasket.

The winding method of the inductance coil comprises the following steps:

1. firstly, when a single-circuit inductor (comprising single-strand and multi-strand) is wound horizontally, the inductor is wound from the middle to two sides, winding structures in different opposite directions are adopted, the distance between the head and the tail is not less than 3mm, (the result that the head and the tail are easy to touch and short circuit is prevented);

2. when the single-circuit inductor (comprising single-circuit and multi-circuit) is wound in an overlapping way, 3 coils are wound forwards and backwards, 2 coils are reversely wound, the coils are horizontally installed, the coils are evenly distributed at the head, the middle and the tail, the height of the coils is one, the coils are wound on the same horizontal plane (2-3 coils can be repeatedly wound at the two ends), the sectional area of the magnetic ring is reasonably and maximally utilized, the utilization rate of a unit winding space is highest, and more coils can be wound by a smaller magnetic ring. The energy storage effect of the magnetic ring is better enhanced;

3. when the multi-path inductors (including single-strand coils and multi-strand coils) are subjected to average return and reverse winding, the result of preventing the head and the tail from being easily collided and short-circuited is generated, the gap between every two paths is not less than 3mm (three paths of output inductors), and each group of coils averagely occupies the sectional area and the winding space of the magnetic ring;

4. when multi-path inductance (including single-strand and multi-strand) is winded, 3 turns forward and 2 turns backward, each group of coils winded forward sequentially occupies the cross section area and windable space of the magnetic ring averagely. The sectional area of the magnetic ring is reasonably and maximally utilized, the utilization rate of unit winding space is highest, and more coils can be wound by smaller magnetic rings. The effect of magnetic ring energy storage is used on average better. The gap between every two paths is not less than 3mm (the result that the head and the tail are easy to touch and short circuit is prevented);

5. the outgoing line is arranged in the magnetic ring, the inductance of the sleeve is required to be sleeved in the middle, and a section of exposed lead at the sleeve opening is ensured not to collide with other lines after the sleeve is sleeved.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (5)

1. The utility model provides a compact switching power supply output inductance coils which characterized in that: the magnetic ring comprises a magnetic ring assembly (1), wherein the magnetic ring assembly (1) comprises a magnetic ring (2), a first winding (3), a second winding (4) and a third winding (5), the first winding (3), the second winding (4) and the third winding (5) are wound on the outer wall of the magnetic ring (2), the first winding (3), the second winding (4) and the third winding (5) are distributed in an annular shape and are arranged at intervals, the first winding (3) and the second winding (4) are arranged oppositely to form a first inductor, and the first winding (3) and the third winding (5) are arranged oppositely to form a second inductor;

the first winding (3) and the third winding (5) are of clockwise winding structures, the second winding (4) is of an anticlockwise winding structure, and the number of winding turns between the first winding (3) and the third winding (5) is the same.

2. The compact switching power supply output inductor of claim 1, wherein: the utility model discloses a winding of first winding (3) is characterized in that the coiling one end of first winding (3) is outside extension first outer lead wire (31), the other end is inside extension first inner lead wire (32), the coiling one end of second winding (4) is outside extension second outer lead wire (41), the other end is inside extension second inner lead wire (42), the coiling one end of third winding (5) is outside extension third outer lead wire (51), the other end is inside extension third inner lead wire (52), first inner lead wire (32), first outer lead wire (31), third outer lead wire (51), third inner lead wire (52), second inner lead wire (42), second outer lead wire (41) set up clockwise in proper order.

3. The compact switching power supply output inductor of claim 2, wherein: the outer parts of the first outer lead (31), the first inner lead (32), the second outer lead (41), the second inner lead (42), the third outer lead (51) and the third inner lead (52) are sleeved with sleeves.

4. The compact switching power supply output inductor of claim 2, wherein: the bottom surface of magnetic ring subassembly (1) is glued joint has packing ring (6), a plurality of outer wire holes (62) have been seted up at the outer lane position of packing ring (6), a plurality of inner wire holes (63) have been seted up at the inner circle position of packing ring (6), first outer lead wire (31), second outer lead wire (41) and third outer lead wire (51) homogeneous phase are to running through outer wire hole (62), first inner lead wire (32), second inner lead wire (42) and third inner lead wire (52) homogeneous phase are to running through inner wire hole (63).

5. The compact switching power supply output inductor of claim 4, wherein: the surface of packing ring (6) is equipped with three silica gel filling block (61), and three silica gel filling block (61) are first silica gel point, second silica gel point and third silica gel point respectively, first silica gel point is located the center department of first winding (3) relatively, and second silica gel point is located the center department of second winding (4) relatively, and third silica gel point is located the center department of third winding (5) relatively.

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