CN216562731U - Closed loop UD inductor - Google Patents

Abstract

The utility model provides a closed-loop UD inductor which comprises a framework, an enameled wire wound on the periphery of the framework, wherein at least two magnetic cores are buckled at two ends of the framework, and when the at least two magnetic cores are buckled at two ends of the framework, the magnetic cores wrap the periphery of the enameled wire; the utility model reduces magnetic leakage, increases conversion efficiency and reduces temperature rise.

Description

Closed loop UD inductor

Technical Field

The utility model relates to the field of inductors, in particular to a closed-loop UD inductor.

Background

An inductor is a component that converts electrical energy into magnetic energy for storage. The inductor is similar in structure to a transformer, but has only one winding. The inductor has an inductance that only impedes the change in current. If the inductor is in a state where no current is passing, it will try to block the current from flowing through it when the circuit is on; if the inductor is in a current passing state, the inductor will try to keep the current unchanged when the circuit is opened. Inductors are also known as chokes, reactors, dynamic reactors.

The existing inductor is a CD open-loop inductor generally, and the open-loop structure can cause overlarge magnetic leakage at the open-loop position when in use, so that the conversion efficiency is low, the copper loss and the iron loss of a product are increased, and the temperature rise is higher.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a closed loop UD inductor which reduces magnetic leakage, increases conversion efficiency and reduces temperature rise.

In order to solve the technical problem, the utility model provides a closed-loop UD inductor which comprises a framework and an enameled wire wound on the periphery of the framework, wherein at least two magnetic cores are buckled at two ends of the framework, and when the at least two magnetic cores are buckled at two ends of the framework, the magnetic cores wrap the periphery of the enameled wire.

Further, the annular has been seted up on the magnetic core, and the annular inboard is provided with the magnetic core axis, and the magnetic core outside is provided with the parcel layer, and skeleton central point puts and is provided with the through-hole, and when the magnetic core was detained and is established to the skeleton both ends, the skeleton tip was located the magnetic core annular, and in the through-hole was worn to locate by the magnetic core axis, the periphery of skeleton was lived in the parcel layer parcel.

Further, the skeleton outside is provided with the mounting groove, and the enameled wire is around locating in the mounting groove.

Further, one side that the skeleton was kept away from to the mounting groove is around being equipped with spacing area, and when the enameled wire was around locating in the mounting groove, spacing area was around locating the periphery of enameled wire.

Furthermore, two sides of the framework are provided with at least two pins, one end of the enameled wire is wound on one pin, and the other end of the enameled wire is wound on the other pin.

Furthermore, the magnetic core outside is seted up flutedly, and when the magnetic core was detained and is established to the skeleton both ends, the stitch was located the recess.

Further, when the end of the enameled wire is wound on the pin, the enameled wire is connected with the pin through tinning.

Furthermore, the longitudinal section of the magnetic core is of an M-shaped structure.

The utility model has the advantages that after the enameled wire is wound to the periphery of the framework, the stability and the external shape of the enameled wire are maintained through the framework, then the magnetic cores are buckled at the two ends of the framework, the periphery of the enameled wire is wrapped through the magnetic cores, so that the inner side of the enameled wire is limited through the framework, the outer side of the enameled wire is limited through the magnetic cores, the overall structure stability of the enameled wire is increased, and the outer periphery of the enameled wire forms a closed-loop structure due to the fact that the enameled wire is wrapped through the magnetic cores, the magnetic leakage condition can be effectively reduced through the closed-loop structure, the conversion efficiency is higher, the copper loss and the iron loss are reduced, the problem of over-high temperature rise is avoided, and compared with the existing open-loop structure, the closed-loop structure adopted by the scheme can effectively reduce the noise of an inductor in the use process through the closed-loop structure, so that the inductor with the closed-loop structure can more easily pass an EMI test, meanwhile, the magnetic core of the closed-loop structure can wrap the magnetic field inside, so that the enameled wire winding can obtain high-efficiency magnetic field conduction in a certain effective volume, and the energy density is ensured to be large enough in an APFC state.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Reference numerals: 1. a framework; 2. enamelled wires; 3. a magnetic core; 4. a limiting band; 5. and (4) stitching.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

As shown in fig. 1, the present invention provides a closed-loop UD inductor, which includes a framework 1, an enamel wire 2 wound around the framework 1, at least two magnetic cores 3 fastened to two ends of the framework 1, and when the at least two magnetic cores 3 are fastened to two ends of the framework 1, the magnetic cores 3 wrap the outer periphery of the enamel wire 2.

After the enameled wire is wound to the periphery of the framework, the stability and the external shape of the enameled wire are maintained through the framework, then the magnetic cores are buckled at the two ends of the framework, the periphery of the enameled wire is wrapped through the magnetic cores, so that the inner side of the enameled wire is limited through the framework, the outer side of the enameled wire is limited through the magnetic cores, the overall structure stability of the enameled wire is improved, and the periphery of the enameled wire forms a closed-loop structure due to the fact that the enameled wire is wrapped through the magnetic cores, the magnetic leakage condition can be effectively reduced through the closed-loop structure, the conversion efficiency is higher, the copper loss and the iron loss are reduced, the problem of over-high temperature is avoided, and compared with the existing open-loop structure, the closed-loop structure adopted by the scheme can effectively reduce the noise in the use process of the inductor through the closed-loop structure, so that the inductor with the closed-loop structure can pass the EMI test more easily, meanwhile, the magnetic core of the closed-loop structure can wrap the magnetic field inside, so that the enameled wire winding can obtain high-efficiency magnetic field conduction in a certain effective volume, and the energy density is ensured to be large enough in an APFC state.

It is worth mentioning that the closed loop UD inductor provided by the scheme can meet the chip with the refresh rate of 5KHZ-500KHZ, and the initial refresh rate of the IC chip of the existing open loop CD inductor is more than or equal to 300KHZ, so that the closed loop UD inductor provided by the scheme is suitable for more IC chips; in addition, the magnetic core adopted in the scheme can be selected from various types such as PQ, POT, EE, GU, ER, EQ and the like, and the scheme is not limited here.

Preferably, the annular has been seted up on the magnetic core 3, and the annular inboard is provided with the magnetic core axis, and the 3 outsides of magnetic core are provided with the parcel layer, and 1 central point of skeleton puts and is provided with the through-hole, and when the magnetic core 3 was detained and is established to 1 both ends of skeleton, 3 tip of skeleton were located the magnetic core annular, and the magnetic core axis is worn to locate the through-hole, and the periphery of skeleton 1 is lived in the parcel layer parcel.

Specifically, when the magnetic core is buckled and is established to the skeleton tip, protect spacingly through the tip of annular to the skeleton, insert the magnetic core axis simultaneously to the through-hole that skeleton central point put for the magnetic core axis carries out the center to the skeleton spacing, simultaneously because the setting of parcel layer, wrap up the protection through the parcel layer to the periphery of skeleton, make the enameled wire of winding in the skeleton periphery also be in the parcel within range of parcel layer, and then form closed loop structure to the enameled wire through the parcel layer, reduce the condition of magnetic leakage.

Preferably, the outer side of the framework 1 is provided with an installation groove, and the enameled wire 2 is wound in the installation groove.

Specifically, when being equipped with the enameled wire around establishing to skeleton periphery, with the enameled wire installation to the mounting groove in, carry on spacingly to the enameled wire through the mounting groove, avoid winding the problem that the four times scattered appears in the enameled wire of skeleton periphery, simultaneously because the enameled wire is around setting up in the mounting groove for the enameled wire can be orderly winding in the mounting groove, increases the orderliness of enameled wire winding in-process.

In this scheme, the mounting groove is laid along the circumferencial direction of skeleton periphery for when the enameled wire was around establishing to the mounting groove in, the enameled wire is multilayer winding structure, increases the compact type and the arrangement orderliness between each layer of winding of enameled wire.

Preferably, the mounting groove is kept away from one side of skeleton 1 and is wound and be equipped with spacing area 4, and when enameled wire 2 was when locating the mounting groove, spacing area 4 was around locating enameled wire 2's periphery.

Specifically, because the enameled wire when locating in the mounting groove, can carry out the spacing of both sides about going on to the enameled wire through the mounting groove, with spacing area this moment around establishing to one side that the skeleton was kept away from to the mounting groove for spacing area carries on spacingly to the enameled wire that is located the mounting groove, and then makes carrying out comprehensive spacing, increase the stability in use of enameled wire all around through skeleton inboard, mounting groove both sides and spacing area of enameled wire.

In this scheme, spacing area adopts the sticky tape, pastes spacingly in the periphery of enameled wire through the sticky tape winding.

Preferably, two sides of the framework 1 are provided with at least two pins 5, one end of the enameled wire 2 is wound on one pin 5, and the other end of the enameled wire 2 is wound on the other pin 5.

The mode of the enameled wire end part winding stitch is used for fixing two ends of the enameled wire, and meanwhile, the end part of the enameled wire is convenient to connect with other external equipment, for example, the stitch is welded on a PCB (printed circuit board) so that the enameled wire is electrically connected with the PCB.

Preferably, the magnetic core 3 outside is seted up flutedly, and when the magnetic core 3 was detained and is established to skeleton 1 both ends, stitch 5 was located the recess.

Specifically, through the setting of recess, owing to need guide the outside to the magnetic core through the tip of stitch with the enameled wire, so that enameled wire and stitch and other equipment spare part connect, consequently detain when the magnetic core and establish to the skeleton tip after, the stitch is located the recess, make the stitch can outwards expose from the magnetic core is inside through the recess, and because the stitch is located the recess, and the stitch setting is on the skeleton, consequently can also carry on spacingly through the cooperation of recess with the stitch to the circumference of skeleton, increase the stability in the inductor use.

Preferably, when the end of the enamel wire 2 is wound around the pin 5, the enamel wire 2 is connected to the pin 5 by tinning.

The enameled wire is characterized in that the enameled wire surface is provided with a plurality of enameled wires, the enameled wires are connected with the pins in a tinning mode, and the enameled wires are connected with the pins in a sleeved mode.

Preferably, the longitudinal section of the magnetic core 3 is in an "M" shape.

Specifically, through the setting of "M" type structure for the magnetic core forms the annular, and the structure of "M" type can guarantee that the inboard magnetic core axis of annular is parallel to each other in the vertical direction with the parcel layer in the annular outside simultaneously, and then increases the spacing effect of magnetic core axis and parcel layer to the cooperation of skeleton.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.

Claims (8)

1. A closed loop UD inductor characterized by: including skeleton (1), around enameled wire (2) of locating skeleton (1) periphery, skeleton (1) both ends are detained and are equipped with two at least magnetic cores (3), and when two at least magnetic cores (3) were detained and are established to skeleton (1) both ends, magnetic core (3) wrapped up the periphery of enameled wire (2).

2. The closed loop UD inductor of claim 1 wherein: the annular has been seted up on magnetic core (3), and the annular inboard is provided with the magnetic core axis, and the magnetic core (3) outside is provided with the parcel layer, and skeleton (1) central point puts and is provided with the through-hole, detains when establishing to skeleton (1) both ends when magnetic core (3), and skeleton (1) tip is located the magnetic core annular, and in the through-hole was worn to locate by the magnetic core axis, the periphery of skeleton (1) was lived in the parcel layer parcel.

3. The closed loop UD inductor of claim 1 wherein: the outside of the framework (1) is provided with an installation groove, and the enameled wire (2) is wound in the installation groove.

4. The closed loop UD inductor of claim 3 wherein: one side that skeleton (1) was kept away from to the mounting groove is around being equipped with spacing area (4), when enameled wire (2) when locating in the mounting groove, spacing area (4) are around locating the periphery of enameled wire (2).

5. The closed loop UD inductor of claim 1 wherein: two sides of the framework (1) are provided with at least two pins (5), one end of the enameled wire (2) is wound on one pin (5), and the other end of the enameled wire (2) is wound on the other pin (5).

6. The closed loop UD inductor according to claim 5, wherein: the magnetic core (3) is provided with a groove, and when the magnetic core (3) is buckled at the two ends of the framework (1), the pins (5) are positioned in the groove.

7. The closed loop UD inductor according to claim 5, wherein: when the end part of the enameled wire (2) is wound on the pin (5), the enameled wire (2) is connected with the pin (5) through tinning.

8. The closed loop UD inductor of claim 1 wherein: the longitudinal section of the magnetic core (3) is of an M-shaped structure.

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