CN209216722U - Switching mode power supply transformer - Google Patents

Abstract

The utility model provides a kind of switching mode power supply transformer, including magnetic core, magnetic core includes the magnetic holder with accommodating cavity and the magnetic pole in accommodating cavity, the two sides of magnetic holder offer opening respectively, the switching mode power supply transformer further includes coil windings, coil windings are wound in the magnetic pole by flat enameled wire along the radially superimposed of magnetic pole, and the outer circle coil of coil windings is on circle coil in the inner；The end of coil windings forms pin, and each pin draws magnetic holder through opening, and the opening of radial two sides two of coil windings stretches out magnetic holder.Using flat enameled wire, the coiling in magnetic pole forms coil windings to the utility model, and is around in outer circle coil on interior circle coil, so that coil windings are radially extended along magnetic pole, to reduce volume, coil windings is allow to bear biggish electric current, reduces fever；It stretches out the two sides of coil windings outside magnetic holder, to improve radiating efficiency, and then guarantees the switching mode power supply transformer small volume of production and larger current and power can be born.

Description

Switching mode power supply transformer

Technical field

The utility model belongs to transformer technology field, is to be related to a kind of switching mode power supply transformer more specifically.

Background technique

Switching mode power supply transformer is common electronic device.Switching mode power supply transformer generally comprises magnetic core, is wound in magnetic core On coil and the pin terminals that are mounted on magnetic core, overhang be weldingly connected to use with corresponding pin terminal.Line Circle is generallyd use enameled wire (the rounded enameled wire in section) coiling or is made using punching press copper sheet or use flat wire (flat Enameled wire) or using internal PCB (printed circuit board) production for being equipped with coil.For flat transformer, currently generally use Enameled wire same plane coiling or using pcb board make coil, however this switching mode power supply transformer bear electric current compared with It is small, the case where being only applicable to low current.And for the switching mode power supply transformer of high-power high-current, due to switching mode power supply transformer Coil winding need that heat can be generated by biggish electric current, generally using punching press copper sheet along magnetic core it is axially stacked setting or Using flat wire along the coiling of magnetic core axial screw or using the enameled wire being relatively large in diameter along magnetic core axial screw coiling, to increase Heat dissipation area, and guarantee that coil can bear biggish electric current.But this structure can make the height of switching mode power supply transformer It is larger, and then keep the volume of switching mode power supply transformer larger.

Utility model content

The purpose of this utility model is to provide a kind of switching mode power supply transformers, to solve big function existing in the prior art The bulky problem of the switching mode power supply transformer of rate.

In order to achieve the above purposes, the technical solution adopted by the utility model is: provides a kind of switching mode power supply transformer, including Magnetic core, the magnetic core include the magnetic holder with accommodating cavity and the magnetic pole in the accommodating cavity, the two sides difference of the magnetic holder Offer the opening for being connected to the accommodating cavity, the switching mode power supply transformer further include the coil that is wound in the magnetic pole around Group, the coil windings are wound in the magnetic pole by flat enameled wire along the radially superimposed of the magnetic pole, and the coil windings Outer circle coil on circle coil in the inner；Each end of the coil windings is respectively formed pin, described in each pin warp Opening draws the magnetic holder, and radial two sides two opening of the coil windings stretches out the magnetic holder；The coil Winding includes the armature winding being wound in the magnetic pole and the secondary windings that is wound in the magnetic pole, the armature winding with The secondary windings is arranged side by side along the axial direction of the magnetic pole.

Further, the range of the ratio between the width of the flat enameled wire and the flat enameled wire thickness is 10-15.

Further, the width of the flat enameled wire be 2.4mm, the flat enameled wire with a thickness of 0.2mm.

Further, the resistance value of the coil windings is less than or equal to 9m Ω.

Further, the flat enameled wire includes that the polyamidoimide of flat copper wire and the package flat copper wire is exhausted Edge layer.

Further, the magnetic core is FERRITE CORE.

Further, two input pins are drawn at the both ends of the armature winding respectively, and the middle section of the secondary windings is adopted Output pin is connected and led to flat enameled wire, and two output pins are drawn at the both ends of the secondary windings respectively.

Further, each input pin is drawn by the opening of the magnetic holder side；Each output pin is by described The opening of the magnetic holder other side is drawn.

Further, the end of each input pin is equipped with input pad, and the end of each output pin is equipped with defeated Pad out.

Further, the switching mode power supply transformer further includes wrapping up corresponding to except the coil windings exposing magnetic holder Partial insulation protection glue.

The beneficial effect of switching mode power supply transformer provided by the utility model is: compared with prior art, this is practical new Using flat enameled wire, the coiling in magnetic pole forms coil windings to type, and is around in outer circle coil on interior circle coil, so that line Circle winding is radially extended along magnetic pole, to reduce volume, coil windings is allow to bear biggish electric current, is reduced fever；Make simultaneously The two sides of coil windings are stretched out outside magnetic holder, to improve radiating efficiency, and then guarantee the switching mode power supply transformer small volume of production And larger current and power can be born；And magnetic holder is drawn into form pin in the end of coil windings, it can be convenient processing system Make, while being easily installed use.

Detailed description of the invention

It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with It obtains other drawings based on these drawings.

Fig. 1 is the positive structure diagram of switching mode power supply transformer provided by the embodiment of the utility model；

Fig. 2 is the side structure schematic view of switching mode power supply transformer provided by the embodiment of the utility model；

Fig. 3 is the schematic cross-sectional view of switching mode power supply transformer provided by the embodiment of the utility model；

Fig. 4 is the structural schematic diagram of flat enameled wire cross section in switching mode power supply transformer shown in Fig. 3；

Fig. 5 is the schematic diagram of switching mode power supply transformer provided by the embodiment of the utility model.

Wherein, each attached drawing main mark in figure:

100- switching mode power supply transformer；10- magnetic core；11- magnetic pole；20- magnetic holder；21- box body；211- cassette bottom；212- side wall； 22- box cover；221- first side；222- second side；223- third side；The 4th side 224-；30- coil windings；At the beginning of 31- Grade winding；32- secondary windings；310- pin；311- input pin；312- input pad；321- output pin；322- output weldering Disk；The flat enameled wire of 33-；331- flat copper wire；332- insulating layer；41- protective glue.

Specific embodiment

In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein It applies example to be only used to explain the utility model, is not used to limit the utility model.

It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element On one element or indirectly on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined." several " are meant that one or more, unless otherwise clearly specific limit It is fixed.

In the description of the present invention, it should be understood that term " center ", " length ", " width ", " thickness ", The orientation of the instructions such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" or Positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description, Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because This should not be understood as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements or the interaction relationship of two elements.For those of ordinary skill in the art and Speech, can understand the concrete meaning of above-mentioned term in the present invention as the case may be.

Also referring to Fig. 1 to Fig. 5, now switching mode power supply transformer 100 provided by the utility model is illustrated.It is described Switching mode power supply transformer 100, including magnetic core 10 and coil windings 30；Magnetic core 10 includes magnetic holder 20 and magnetic pole 11, is had in magnetic holder 20 Have accommodating cavity (not marked in figure), the two sides of magnetic holder 20 offer opening (not marking in figure) respectively, and each opening connects with accommodating cavity It is logical；Magnetic pole 11 is set in accommodating cavity, and the both ends of magnetic pole 11 are connected with the bottom and top of magnetic holder 20 respectively.Coil windings 30 It is wound in magnetic pole 11, to support coil windings 30 by magnetic pole 11, while playing the role of magnetic conduction.Coil windings 30 are by flat Flat enameled wire 33 is laminated coiling and forms, i.e., flat enameled wire 33 is wound in magnetic pole 11, to form coil windings 30, and line Enclose winding 30 outer circle coil on circle coil in the inner so that the radially extending along magnetic pole 11 of coil windings 30, i.e. coil around Group 30 is wound in the magnetic pole 11 by flat enameled wire 33 along the radially superimposed of magnetic pole 11, to promote the ability for bearing electric current, together When reduce occupied space.Each end of coil windings 30 is respectively formed pin 310, and each pin 310 draws magnetic holder 20 through opening, from And each pin 310 can use also in flat after magnetic holder 20 directly as pin 310, made with facilitating, pin may be implemented 310 Multidirectional-moving enables the switching mode power supply transformer 100 of production is multi-faceted flexibly to install and use to be installed and used. The opening of radial two sides two of coil windings 30 stretches out magnetic holder 20；To improve radiating efficiency, convenient for bearing bigger electric current With power.

Coil windings 30 include the armature winding 31 being wound in magnetic pole 11 and the secondary windings 32 being wound in magnetic pole 11, Armature winding 31 and secondary windings 32 are arranged side by side along the axial direction of magnetic pole 11, to guarantee to have lesser thickness in height space Degree, while the transformation function of transformer may be implemented.So that armature winding 31 is by flat enameled wire 33 along the radial layer of magnetic pole 11 Lap wound is formed in the magnetic pole 11, and armature winding 31 respectively stretch out magnetic holder 20 and form pin 310 by end.Secondary windings 32 is by flat enamel-cover Line 33 is wound in the magnetic pole 11 along the radially superimposed of magnetic pole 11, and secondary windings 32 respectively stretch out magnetic holder 20 and form pin 310 by end.

Switching mode power supply transformer 100 provided by the utility model, compared with prior art, the utility model use flat paint The coiling in magnetic pole 11 of envelope curve 33 forms coil windings 30, and is around in outer circle coil on interior circle coil, so that coil windings 30 radially extend along magnetic pole 11, to reduce volume, coil windings 30 are allow to bear biggish electric current, reduce fever；Make simultaneously The two sides of coil windings 30 are stretched out outside magnetic holder 20, to improve radiating efficiency, and then guarantee 100 body of switching mode power supply transformer of production Product is smaller and can bear larger current and power；And by the end of coil windings 30 extraction magnetic holder 20 to form pin 310, it can To facilitate processing and fabricating, while it being easily installed use, and the structure is not necessarily to that skeleton or 310 end of pin are arranged on magnetic core 10 Son, structure are more simple.

Further, referring to Figure 4 together, a kind of tool as switching mode power supply transformer 100 provided by the utility model The range of the ratio between body embodiment, the width b of flat enameled wire 33 and the flat 33 thickness a of enameled wire are 10-15, i.e., flat paint The width b of envelope curve 33 is 10-15 times of its thickness a, in order to coiling, identical diameter range can be with coiling more multiturn line Circle, in identical the number of turns coil, can bear bigger electric current, and keep the thickness of coil windings 30 smaller, to reduce production Switching mode power supply transformer 100 volume.

Further, also referring to Fig. 1, Fig. 3 and Fig. 4, as switching mode power supply transformer 100 provided by the utility model A kind of specific embodiment, the width b of flat enameled wire 33 is 2.4mm, and the thickness a of flat enameled wire 33 is 0.2mm, to mention The ability for bearing electric current is risen, fever is reduced, while making 100 small volume of switching mode power supply transformer of production, power is big.

Further, also referring to Fig. 1, Fig. 3 and Fig. 4, as switching mode power supply transformer 100 provided by the utility model A kind of specific embodiment, the resistance values of coil windings 30 is less than or equal to 9m Ω.That is the resistance value of armature winding 31 is less than Or it is equal to 9m Ω, the resistance value of secondary windings 32 is less than or equal to 9m Ω, passes through calorific value when high current to reduce, and promotion is held By the ability of electric current, voltage swing.

Further, also referring to Fig. 1, Fig. 3 and Fig. 4, as switching mode power supply transformer 100 provided by the utility model A kind of specific embodiment, flat enameled wire 33 include flat copper wire 331 and wrap up flat copper wire 331 polyamidoimide Insulating layer 332.Using flat copper wire 331, to reduce resistance value, and then reduce the armature winding 31 and secondary windings 32 of production Resistance value promotes the rated current of the switching mode power supply transformer 100 of production, reaches to be not easy to generate heat when passing through high current The requirement of low D.C. resistance and high rated current.Polyamidoimide insulating layer 332, Ke Yigeng is wrapped up in flat copper wire 331 Good insulate, and promotes high frequency tolerant performance, while guaranteeing that flat enameled wire 33 has good high temperature resistance, high temperature resistant It can reach 180 DEG C.

Further, also referring to Fig. 1 and Fig. 3, as switching mode power supply transformer 100 provided by the utility model one Kind specific embodiment, magnetic core 10 are FERRITE CORE.I.e. magnetic core 10 is made of Ferrite Material, so as to guarantee have Under higher magnetic conductivity, there is preferable temperature coefficient, can work under higher and lower operating temperature, is lost low.

Further, also referring to Fig. 1, Fig. 3 and Fig. 5, as switching mode power supply transformer 100 provided by the utility model A kind of specific embodiment, the both ends of armature winding 31 draw two input pins 311 respectively, use in order to connect.Into One step, the middle section of secondary windings 32 using the connection of flat enameled wire 33 and leads to output pin 321, and secondary windings 32 Two output pins 321 are drawn respectively in both ends.In order to use, while it can be selected as needed transformation ability.I.e. coil around The pin 310 of group 30 includes above-mentioned two input pin 311 and above three output pin 321.

Further, also referring to Fig. 1, Fig. 3 and Fig. 5, as switching mode power supply transformer 100 provided by the utility model A kind of specific embodiment, each input pin 311 by 20 side of magnetic holder opening draw；Each output pin 321 is by magnetic holder 20 The opening of the other side is drawn.The structure not only facilitates production, while can be convenient use, and can by each opening be arranged compared with It is small, to reduce leakage field.

Further, also referring to Fig. 1, Fig. 3 and Fig. 5, as switching mode power supply transformer 100 provided by the utility model A kind of specific embodiment, the end of each input pin 311 is equipped with input pad 312, and the end of each output pin 321 is equipped with O pads 322, to facilitate welding to use.

Further, also referring to Fig. 1, Fig. 3 and Fig. 5, as switching mode power supply transformer 100 provided by the utility model A kind of specific embodiment, the switching mode power supply transformer 100 further include package coil windings 30 expose it is corresponding except magnetic holder 20 Partial insulation protection glue 41.Expose the portion envelops insulation protection glue 41 except magnetic holder 20 in coil windings 30, i.e., it is primary around Group 31 and secondary windings 32 stretch out the portion envelops insulation protection glue 41 except magnetic holder 20, it can realize to coil windings 30 Protection, and good insulating effect can be played.

Further, also referring to Fig. 1 to Fig. 3, as switching mode power supply transformer 100 provided by the utility model one Kind of specific embodiment, magnetic holder 20 include box body 21 and box cover 22, and box body 21 includes cassette bottom 211 and convex by the both ends of cassette bottom 211 The side wall 212 extended out, box cover 22 are installed on side wall 212, and the both ends of magnetic pole 11 are connected with cassette bottom 211 and box cover 22 respectively, The structure can be convenient processing and fabricating, while be convenient for the coiling of coil windings 30.

Further, also referring to Fig. 1 to Fig. 3, as switching mode power supply transformer 100 provided by the utility model one Kind specific embodiment, the inner surface of side wall 212 are arc-shaped, so that the inner surface at the both ends of accommodating cavity is in circular arc in magnetic holder 20 Shape promotes the utilization rate in space in accommodating cavity convenient for accommodating coil windings 30.

Further, box body 21 is to be integrally formed, and so as to processing and fabricating, while guaranteeing the connection of cassette bottom 211 Yu side wall 212 Intensity.Further, magnetic pole 11 and box body 21 are integrally formed, to guarantee the bonding strength of magnetic pole 11 Yu box body 21.Certainly, at it In its some embodiment, magnetic pole 11 can also be integrally formed with box cover 22.

Further, box cover 22 is in two sides symmetrical structure, and box cover 22 is in both ends symmetrical structure, not only facilitates processing and fabricating, It can make each guide magnetic symmetry of magnetic core 10 simultaneously, reduce loss.

Colleague, box body 21 are in two sides symmetrical structure, and box body 21 is in both ends symmetrical structure, so as to processing and fabricating, while can be with Make each guide magnetic symmetry of magnetic core 10, reduces loss.

Further, box cover 22 is identical as the shape of cassette bottom 211, not only facilitates production, but also can guarantee 10 liang of magnetic core The consistency in face reduces loss.

Further, box cover 22 have two first sides 221 that are parallel and being located at 22 both ends of box cover, respectively by The both ends of each first side 221 tilt extend to the outside the second side 222 of extension respectively, by each second side 222 far from first One end of side 221 is inwardly angled to shrink the third side 223 extended and is separately connected two in 22 the same side of the box cover 4th side 224 of 223 end of third side；Two the 4th sides 224 are arranged in parallel, and each 4th side 224 is parallel to box cover 22 length directions, the angle between each second side 222 and adjacent first side 221 is obtuse angle, each third side 223 and phase Angle between adjacent 4th side 224 is obtuse angle, which not only facilitates production, while multiple sides can be in order to solid It is fixed.Also, the structure due to cassette bottom 211 is identical as 22 shape of box cover, and the two sidewalls 212 of box body 21 are by the both ends of cassette bottom 211 Extend, so that 20 both-side opening of magnetic holder formed is smaller, and region bigger in coil windings 30 can be wrapped up, to reduce Leakage field reduces loss.

Further, the distance between two the 4th sides 224 are less than or equal to the length of first side 221, not only side Just it makes, while can reduce the width of magnetic holder 20, and then reduce the volume of the switching mode power supply transformer 100 of production.

Further, 22 the same end of box cover is big far from the distance between 221 one end of first side to two second sides 222 In or equal to coil windings 30 diameter.So as to so that the maximum width of magnetic core 10 is greater than or equal to the straight of coil windings 30 Diameter so as to so that magnetic core 10 protects coil windings 30, and increases magnetic core 10 and wraps up region bigger in coil windings 30, with Leakage field is reduced, loss is reduced.

Further, Fig. 1 to Fig. 5 is please referred to, can be held as switching mode power supply transformer 100 provided by the utility model By -55 DEG C~125 DEG C of operating temperature range.Low D.C. resistance and high rated current application requirement may be implemented.It installs and uses Flexibly, high reliablity can achieve military requirements.And it can satisfy the test requirements document of GJB2829 and GJB360B.And it operates It is convenient, it is easy to accomplish batch production.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (10)

1. switching mode power supply transformer, including magnetic core, the magnetic core includes having the magnetic holder of accommodating cavity and being set in the accommodating cavity Magnetic pole, the two sides of the magnetic holder offer the opening for being connected to the accommodating cavity respectively, it is characterised in that: the Switching Power Supply becomes Depressor further includes the coil windings being wound in the magnetic pole, and the coil windings are by flat enameled wire along the radial direction of the magnetic pole Stacking is wound in the magnetic pole, and the outer circle coil of the coil windings is on circle coil in the inner；The coil windings it is each End is respectively formed pin, and each pin draws the magnetic holder, the radial two sides warp of the coil windings through the opening Two openings stretch out the magnetic holder；The coil windings include the armature winding being wound in the magnetic pole and are wound in institute The axial direction that the secondary windings in magnetic pole, the armature winding and the secondary windings are stated along the magnetic pole is arranged side by side.

2. switching mode power supply transformer as described in claim 1, it is characterised in that: the width of the flat enameled wire is flat with this The range of the ratio between enameled wire thickness is 10-15.

3. switching mode power supply transformer as claimed in claim 2, it is characterised in that: the width of the flat enameled wire is 2.4mm, The flat enameled wire with a thickness of 0.2mm.

4. switching mode power supply transformer as described in claim 1, it is characterised in that: the resistance value of the coil windings is less than or waits In 9m Ω.

5. switching mode power supply transformer as described in claim 1, it is characterised in that: the flat enameled wire include flat copper wire and Wrap up the polyamidoimide insulating layer of the flat copper wire.

6. switching mode power supply transformer as described in any one in claim 1-5, it is characterised in that: the magnetic core is ferrite magnetic Core.

7. switching mode power supply transformer as described in any one in claim 1-5, it is characterised in that: the both ends of the armature winding point Not Yin Chu two input pins, the middle section of the secondary windings connects and leads to output pin, and institute using flat enameled wire Two output pins are drawn respectively in the both ends for stating secondary windings.

8. switching mode power supply transformer as claimed in claim 7, it is characterised in that: each input pin is by the magnetic holder side Opening draw；Each output pin is drawn by the opening of the magnetic holder other side.

9. switching mode power supply transformer as claimed in claim 7, it is characterised in that: the end of each input pin is equipped with input The end of pad, each output pin is equipped with o pads.

10. switching mode power supply transformer as described in any one in claim 1-5, it is characterised in that: the switching mode power supply transformer It further include the insulation protection glue for wrapping up the coil windings and exposing corresponding part except the magnetic holder.