CN107221418A - Switch transformer - Google Patents

Switch transformer Download PDF

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Publication number
CN107221418A
CN107221418A CN201710474587.3A CN201710474587A CN107221418A CN 107221418 A CN107221418 A CN 107221418A CN 201710474587 A CN201710474587 A CN 201710474587A CN 107221418 A CN107221418 A CN 107221418A
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CN
China
Prior art keywords
coil
stitch
magnetic core
skeleton
connecting portion
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Granted
Application number
CN201710474587.3A
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Chinese (zh)
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CN107221418B (en
Inventor
臧海娟
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Jiangsu University of Technology
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Jiangsu University of Technology
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Priority to CN201710474587.3A priority Critical patent/CN107221418B/en
Publication of CN107221418A publication Critical patent/CN107221418A/en
Application granted granted Critical
Publication of CN107221418B publication Critical patent/CN107221418B/en
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/30Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306Fastening or mounting coils or windings on core, casing or other support
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00Fixed inductances of the signal type 
    • H01F17/04Fixed inductances of the signal type  with magnetic core
    • H01F17/06Fixed inductances of the signal type  with magnetic core with core substantially closed in itself, e.g. toroid
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2823Wires
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2823Wires
    • H01F27/2828Construction of conductive connections, of leads
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/2876Cooling
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/29Terminals; Tapping arrangements for signal inductances
    • H01F27/292Surface mounted devices
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/28Coils; Windings; Conductive connections
    • H01F27/32Insulating of coils, windings, or parts thereof
    • H01F27/324Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion

Abstract

The present invention relates to a kind of switch transformer, for Switching Power Supply, Switching Power Supply includes shell, all kinds of electronic components including switch transformer of circuit board and installation on circuit boards.Circuit board is arranged in shell.The switch transformer includes the switch transformer component with primary coil, magnetic core, secondary coil and fixed adhesive plaster.Switch transformer component with primary coil includes skeleton, primary coil, degaussing coil, boost voltage coil and stitch.The circle of quantity 1 to 8 of secondary coil 8, includes 1 to 3 inductor loop conductor per circle secondary coil.Inductor loop conductor is integrally inverted U shape;The stitch of switch transformer is electrically connected with circuit board, and 2 connection ends of all inductor loop conductors of the secondary coil of switch transformer are electrically connected after passing through the corresponding via of circuit board by way of slicker solder is welded with circuit board.Each circle secondary coil completes loop by circuit board and connected.The manufacturing process of switch transformer is simple, radiating effect is preferable.

Description

Switch transformer
The application is Application No.:201510096673.6, invention and created name is《Switch transformer and Switching Power Supply》, The applying date is:The divisional application of the application for a patent for invention on March 4th, 2015.
Technical field
The present invention relates to a kind of Switching Power Supply, more particularly to a kind of Switching Power Supply equipped with high frequency switch transformer.
Background technology
With the high speed development of Power Electronic Technique, the work of power electronic equipment and people, the relation of life are increasingly close Cut, and electronic equipment all be unable to do without reliable power supply, and Switching Power Supply is realized comprehensively into the computer power supply eighties, takes the lead in The power supply for completing computer is regenerated, and various electronics, electric equipment field, programme-controlled exchange are subsequently entered into the Switching Power Supply nineties Switching Power Supply has all been widely used in machine, communication, electron detection device power supply, control device power supply etc., more promotes switch Power technology is developed rapidly.
Usual Switching Power Supply includes an aluminium alloy system or the longitudinal casing of steel and one piece is fixed in shell Printed circuit board (PCB), is additionally provided with the heat abstractors such as fin or fan between shell and circuit board, by fasteners such as screws and The screw that the shell of Switching Power Supply is provided with can fix Switching Power Supply on an electronic device.High frequency is installed on circuit board to open Close transformer, the electronic component such as inductance, high frequency switch transformer mainly include skeleton, through skeleton magnetic core and be arranged on Armature winding, secondary windings on skeleton, armature winding and secondary windings are wrapped on skeleton in form of a coil, secondary coil It is to enclose winding with the copper cash one of whole circle to complete loop, primary coil and secondary coil are radial distributions, such whole The coil of circle winding causes caloric value larger, and multiple-turns wound make it that the radiating effect of electronic component is poor, in addition to just In the winding of coil, the diameter of coil must be designed to smaller so that the toughness of coil is preferably completely wound, and coil is straight The less words in footpath are accomplished by increasing the number of turn of coil, then the process that the increase of the number of turn of coil allows for winding equally increases, The processing technology of the switch transformer is too complicated, and manufacture human cost is too high, and the appearance of some position of coil is for example old , it is necessary to change whole switch transformer during the problem of changing fracture etc..In addition, the secondary coil of whole circle winding is needed in insulating Design More insulating tape is used, cost is also higher.The PQ35 switch transformers that such as in the market is sold extensively exist above-mentioned Each shortcoming.
The content of the invention
The technical problem to be solved in the present invention is to provide switch transformer a kind of simple in construction and relatively low manufacturing cost and The radiating effect of Switching Power Supply, the switch transformer and Switching Power Supply is preferable and is easy to maintenance.
Realize that one of technical scheme of the object of the invention is to provide a kind of skeleton of switch transformer, including it is centrally located Principal part, be symmetricly set on principal part the left and right sides magnetic core limiting section and be arranged on corresponding magnetic core limiting section lower section pin Pin connecting portion.The center of principal part being used for provided with left and right insertion installs the magnetic loop hole of magnetic core.Magnetic core limiting section and principal part or so Insertion, and the shape in magnetic core limiting section and magnetic loop hole and the shape of magnetic core are corresponding.The periphery of principal part is sequentially provided with auxiliary vertically Pressure-wire ring recess, left primary coil groove, left secondary wire ring recess, degaussing coil groove, right secondary wire ring recess and right primary coil groove are helped, The peripheral shape of left secondary wire ring recess and right secondary wire ring recess takes the shape of the letter U.Stitch connecting portion is provided with Open Side Down for installing The stitch hole of stitch.
Further, the magnetic core limiting section positioned at the left side of principal part is spacing including left limit plate, upper left limiting section and lower-left Portion, the magnetic core limiting section positioned at the right side of principal part includes right limit plate, upper right limiting section and bottom right limiting section.Left limit plate, the right side Limiting plate is equipped with the through hole with the insertion of magnetic loop hole, and left limit plate and right limit plate are on the circular slab provided with center through hole Symmetrically remove the plate portion formed after a big cambered plate of grade down, upper left limiting section, lower-left limiting section are protruded from symmetrical above and belowly Left limit plate, upper right limiting section, bottom right limiting section protrude from right limit plate, upper left limiting section, upper right limiting section symmetrical above and belowly In isosceles triangle shape, lower-left limiting section, bottom right limiting section are in isosceles triangle shape.Left limit plate, upper left limiting section and a left side The shape that lower limit portion is formed is corresponding with the magnetic core of switch transformer, and right limit plate, upper right limiting section and bottom right limiting section are formed Shape it is corresponding with the magnetic core of switch transformer.
Further, the skeleton of described switch transformer also includes the first space bar, the second space bar, the 3rd interval Plate, the 4th space bar, the 5th space bar and insulation board.The periphery left part of principal part provided with a ring and lower ending opening first interval Plate, first space bar and principal part, left limit plate shape are into boost voltage coil groove.In the middle part of the periphery of principal part provided with a ring and The second space bar, the 3rd space bar, the 4th space bar and the 5th space bar of lower ending opening, the second space bar, the 3rd space bar, 4th space bar and the 5th space bar are spacedly distributed from left to right, so that the second space bar is formed with principal part, the first space bar Left primary coil groove, the second space bar and principal part, the 3rd space bar form left secondary wire ring recess, the 4th space bar and principal part, the Three space bars formation degaussing coil groove, the 4th space bar forms right secondary wire ring recess, the 5th space bar with principal part, the 5th space bar With principal part, right limit plate shape into right primary coil groove.Insulation board has 4, and insulation board is separately positioned on left secondary wire ring recess and the right side The bottom front and rear sides of secondary wire ring recess, so that left secondary wire ring recess and right secondary wire ring recess take the shape of the letter U.
Further, stitch connecting portion is included positioned at the left stitch connecting portion of the lower section of lower-left limiting section and positioned at lower limit on the right The right stitch connecting portion of the lower section in position portion.The lower end of left stitch connecting portion is provided with 5 stitch holes, including 2 primary coil stitch It is spacedly distributed between hole and 3 auxiliary and degaussing coil stitch hole, 5 stitch holes, provided with 4 left sides between 5 stitch holes Coil guide groove.The lower end of right stitch connecting portion is provided with 3 standby stitch holes being spacedly distributed.
Realize that the two of the technical scheme of the object of the invention is to provide a kind of switch transformer component with primary coil, wrap Include skeleton, primary coil, degaussing coil, boost voltage coil and stitch.
Skeleton is including centrally located principal part, the magnetic core limiting section for the left and right sides for being symmetricly set on principal part and is arranged on The stitch connecting portion of the lower section of corresponding magnetic core limiting section.The magnetic that the center of principal part being used for provided with left and right insertion installs magnetic core is returned Lu Kong.Magnetic core limiting section and principal part or so insertion, and the shape in magnetic core limiting section and magnetic loop hole and the shape of magnetic core are corresponding.It is main The periphery in portion is sequentially provided with boost voltage coil groove, left primary coil groove, left secondary wire ring recess, degaussing coil groove, the right side vertically The peripheral shape of secondary wire ring recess and right primary coil groove, left secondary wire ring recess and right secondary wire ring recess takes the shape of the letter U.Stitch connecting portion Including the left stitch connecting portion positioned at the lower section of lower-left limiting section and the right stitch connecting portion positioned at the lower section of bottom right limiting section.It is left The lower end of stitch connecting portion is provided with 5 stitch holes, including 2 primary coil stitch holes and 3 auxiliary and degaussing coil stitch It is spacedly distributed between hole, 5 stitch holes, provided with 4 left coil guide grooves between 5 stitch holes.Under right stitch connecting portion End is provided with 3 standby stitch holes being spacedly distributed.
Stitch by 8, be respectively fixedly disposed at the left stitch connecting portion of skeleton 2 primary coil stitch holes, 3 auxiliary And in degaussing coil stitch hole and 3 standby stitch holes of right stitch connecting portion.
Primary coil, degaussing coil, boost voltage coil use conductor wire.Primary coil is wrapped in the left primary of skeleton In coil groove and right primary coil groove, the 2 primary lines of the initiating terminal and clearing end of primary coil respectively with left stitch connecting portion Stitch in circle stitch hole is welded to connect.Degaussing coil is wrapped in degaussing coil groove, and boost voltage coil is wrapped in auxiliary electricity In line ball ring recess, the initiating terminal or clearing end of degaussing coil and boost voltage coil share the degaussing coil pin of left stitch connecting portion 1 stitch in the 17-1-2 of pin hole, so that the initiating terminal or clearing end of degaussing coil and boost voltage coil are connected with left stitch Same 1 stitch in the degaussing coil stitch hole 17-1-2 in portion is welded to connect, the other end of degaussing coil and boost voltage coil It is welded to connect respectively with the stitch in remaining 2 degaussing coil stitch hole 17-1-2 of left stitch connecting portion.Primary coil, go The equal insulation processing in the cross-contact position of magnetic coil and boost voltage coil.
Realize that the three of the technical scheme of the object of the invention is to provide a kind of switch transformer, including opening with primary coil Close transformer device, magnetic core, secondary coil and fixed adhesive plaster.
Switch transformer component with primary coil include skeleton, primary coil, degaussing coil, boost voltage coil with And stitch.
Skeleton is including centrally located principal part, the magnetic core limiting section for the left and right sides for being symmetricly set on principal part and is arranged on The stitch connecting portion of the lower section of corresponding magnetic core limiting section.The magnetic that the center of principal part being used for provided with left and right insertion installs magnetic core is returned Lu Kong.Magnetic core limiting section and principal part or so insertion, and the shape in magnetic core limiting section and magnetic loop hole and the shape of magnetic core are corresponding.It is main The periphery in portion is sequentially provided with boost voltage coil groove, left primary coil groove, left secondary wire ring recess, degaussing coil groove, the right side vertically The peripheral shape of secondary wire ring recess and right primary coil groove, left secondary wire ring recess and right secondary wire ring recess takes the shape of the letter U.Stitch connecting portion Including the left stitch connecting portion positioned at the lower section of lower-left limiting section and the right stitch connecting portion positioned at the lower section of bottom right limiting section.It is left The lower end of stitch connecting portion is provided with 5 stitch holes, including 2 primary coil stitch holes and 3 auxiliary and degaussing coil stitch It is spacedly distributed between hole, 5 stitch holes, provided with 4 left coil guide grooves between 5 stitch holes.Under right stitch connecting portion End is provided with 3 standby stitch holes being spacedly distributed.
Stitch by 8, be respectively fixedly disposed at the left stitch connecting portion of skeleton 2 primary coil stitch holes, 3 auxiliary And in degaussing coil stitch hole and 3 standby stitch holes of right stitch connecting portion.
Primary coil, degaussing coil, boost voltage coil use conductor wire.Primary coil is wrapped in the left primary of skeleton In coil groove and right primary coil groove, the 2 primary lines of the initiating terminal and clearing end of primary coil respectively with left stitch connecting portion Stitch in circle stitch hole is welded to connect.Degaussing coil is wrapped in degaussing coil groove, and boost voltage coil is wrapped in auxiliary electricity In line ball ring recess, the initiating terminal or clearing end of degaussing coil and boost voltage coil share the degaussing coil pin of left stitch connecting portion 1 stitch in the 17-1-2 of pin hole, so that the initiating terminal or clearing end of degaussing coil and boost voltage coil are connected with left stitch Same 1 stitch in the degaussing coil stitch hole 17-1-2 in portion is welded to connect, the other end of degaussing coil and boost voltage coil It is welded to connect respectively with the stitch in remaining 2 degaussing coil stitch hole 17-1-2 of left stitch connecting portion.Primary coil, go The equal insulation processing in the cross-contact position of magnetic coil and boost voltage coil.
The quantity of the magnetic core is 2, and magnetic core makees paint-dipping process processing, the shape on the head of magnetic core and the left end of skeleton or The shape correspondence of right-hand member, the shape of the core of magnetic core is corresponding with the magnetic loop hole of skeleton.2 magnetic cores are respectively from the left and right two of skeleton The head inserted by its core in magnetic loop hole up to 2 magnetic cores is held to be respectively embedded into the left side and right side of skeleton, so that It is spacing above and below magnetic core to be arranged on skeleton, and form magnetic loop.2 magnetic cores from circumferential using fixed adhesive plaster winding by being fixed Connection, so that magnetic core or so is installed on skeleton.
The circle of quantity 1 to 8 of secondary coil 8, includes 1 to 3 inductor loop conductor per circle secondary coil.Inductor loop conductor Entirety is inverted U shape, and is made of copper material or aluminum core copper wire or aluminum, and the copper material uses the preferable red copper of electric conductivity, inductance The circular in cross-section or kidney ellipsoid of return conductors, its area of section are 0.5 to 10mm2.Inverted U-shaped inductor loop conductor has 2 connection ends.Openings of sizes at 2 connection ends of inductor loop conductor is corresponding with left secondary wire ring recess, inductor loop conductor Height it is corresponding with the height of left primary coil groove.2 circle secondary coils are separately positioned on left secondary wire ring recess and right secondary coil In groove, all inductor loop conductors are open through after the principal part of skeleton by it respectively stretches out left secondary coils by its 2 connection ends Groove or right secondary wire ring recess, the connection end of inductor loop conductor is the initiating terminal and clearing end of secondary coil.
Realize that the four of the technical scheme of the object of the invention is to provide a kind of Switching Power Supply, including shell, circuit board and peace All kinds of electronic components for Switching Power Supply including switch transformer of dress on circuit boards.Circuit boards have Conductive copper foil for whole circuit.Circuit board is arranged in shell.
The switch transformer includes switch transformer component, magnetic core, secondary coil and fixation with primary coil Adhesive plaster.
Switch transformer component with primary coil include skeleton, primary coil, degaussing coil, boost voltage coil with And stitch.
Skeleton is including centrally located principal part, the magnetic core limiting section for the left and right sides for being symmetricly set on principal part and is arranged on The stitch connecting portion of the lower section of corresponding magnetic core limiting section.The magnetic that the center of principal part being used for provided with left and right insertion installs magnetic core is returned Lu Kong.Magnetic core limiting section and principal part or so insertion, and the shape in magnetic core limiting section and magnetic loop hole and the shape of magnetic core are corresponding.It is main The periphery in portion is sequentially provided with boost voltage coil groove, left primary coil groove, left secondary wire ring recess, degaussing coil groove, the right side vertically The peripheral shape of secondary wire ring recess and right primary coil groove, left secondary wire ring recess and right secondary wire ring recess takes the shape of the letter U.Stitch connecting portion Including the left stitch connecting portion positioned at the lower section of lower-left limiting section and the right stitch connecting portion positioned at the lower section of bottom right limiting section.It is left The lower end of stitch connecting portion is provided with 5 stitch holes, including 2 primary coil stitch holes and 3 auxiliary and degaussing coil stitch It is spacedly distributed between hole, 5 stitch holes, provided with 4 left coil guide grooves between 5 stitch holes.Under right stitch connecting portion End is provided with 3 standby stitch holes being spacedly distributed.
Stitch by 8, be respectively fixedly disposed at the left stitch connecting portion of skeleton 2 primary coil stitch holes, 3 auxiliary And in degaussing coil stitch hole and 3 standby stitch holes of right stitch connecting portion.
Primary coil, degaussing coil, boost voltage coil use conductor wire.Primary coil is wrapped in the left primary of skeleton In coil groove and right primary coil groove, the 2 primary lines of the initiating terminal and clearing end of primary coil respectively with left stitch connecting portion Stitch in circle stitch hole is welded to connect.Degaussing coil is wrapped in degaussing coil groove, and boost voltage coil is wrapped in auxiliary electricity In line ball ring recess, the initiating terminal or clearing end of degaussing coil and boost voltage coil share the degaussing coil pin of left stitch connecting portion 1 stitch in the 17-1-2 of pin hole, so that the initiating terminal or clearing end of degaussing coil and boost voltage coil are connected with left stitch Same 1 stitch in the degaussing coil stitch hole 17-1-2 in portion is welded to connect, the other end of degaussing coil and boost voltage coil It is welded to connect respectively with the stitch in remaining 2 degaussing coil stitch hole 17-1-2 of left stitch connecting portion.Primary coil, go The equal insulation processing in the cross-contact position of magnetic coil and boost voltage coil.
The quantity of the magnetic core is 2, and magnetic core makees paint-dipping process processing, the shape on the head of magnetic core and the left end of skeleton or The shape correspondence of right-hand member, the shape of the core of magnetic core is corresponding with the magnetic loop hole of skeleton.2 magnetic cores are respectively from the left and right two of skeleton The head inserted by its core in magnetic loop hole up to 2 magnetic cores is held to be respectively embedded into the left side and right side of skeleton, so that It is spacing above and below magnetic core to be arranged on skeleton, and form magnetic loop.2 magnetic cores from circumferential using fixed adhesive plaster winding by being fixed Connection, so that magnetic core or so is installed on skeleton.
The circle of quantity 1 to 8 of secondary coil 8, includes 1 to 3 inductor loop conductor per circle secondary coil.Inductor loop conductor Entirety is inverted U shape, and is made of copper material or aluminum core copper wire or aluminum, and the copper material uses the preferable red copper of electric conductivity, inductance The circular in cross-section or kidney ellipsoid of return conductors, its area of section are 0.5 to 10mm2.Inverted U-shaped inductor loop conductor has 2 connection ends.Openings of sizes at 2 connection ends of inductor loop conductor is corresponding with left secondary wire ring recess, inductor loop conductor Height it is corresponding with the height of left primary coil groove.2 circle secondary coils are separately positioned on left secondary wire ring recess and right secondary coil In groove, all inductor loop conductors are open through after the principal part of skeleton by it respectively stretches out left secondary coils by its 2 connection ends Groove or right secondary wire ring recess, the connection end of inductor loop conductor is the initiating terminal and clearing end of secondary coil.
8 stitch of switch transformer through circuit board corresponding via after by way of slicker solder is welded with circuit board electricity Connection, 2 connection ends of all inductor loop conductors of the secondary coil of switch transformer are passed through after the corresponding via of circuit board Electrically connected by way of slicker solder is welded with circuit board, so that switch transformer be fixedly connected on circuit boards.It is secondary per circle It is connected in parallel between 1 to 3 inductor loop conductor included by coil by circuit board, circuit is passed through between each circle secondary coil Plate is connected in series, and is connected so that each circle secondary coil completes loop by circuit board.
Further, the electronic component of the installation on circuit boards also includes inductance.Inductance include magnet ring and 1 to 25 circle inductance coils, the magnet ring surface is covered with insulating barrier.Include 1 to 3 second inductor loop conductor per circle inductance coil.The Two inductor loop conductors are integrally inverted U shape, and are made of copper material or aluminum core copper wire or aluminum, the copper material using electric conductivity compared with Good red copper, the circular in cross-section or kidney ellipsoid of the second inductor loop conductor, its area of section are 0.5 to 10mm2.It is inverted U-shaped The second inductor loop conductor there are 2 connection ends.Openings of sizes and magnet ring at 2 connection ends of the second inductor loop conductor Ring footpath correspondence, the height of the second inductor loop conductor is corresponding with the height of magnet ring.All second inductor loop conductors respectively by It is open through after the ring portion of magnet ring with magnet ring tight fit connection, 2 connections of the second inductor loop conductor being enclosed on magnet ring Hold and electrically connected through after the corresponding via of circuit board by way of slicker solder is welded with circuit board, and the second inductor loop conductor is solid Fixed connection on circuit boards, is set on circuit boards so that magnet ring is also spacing in the presence of the second inductor loop conductor.Per circle It is connected in parallel between 1 to 3 second inductor loop conductor included by inductance coil by circuit board, between each circle inductance coil It is connected in series, is connected so that each circle inductance coil completes loop by circuit board, each circle inductance coil surrounds magnetic by circuit board The equiangularly spaced distribution in the center of ring.
Further described Switching Power Supply also includes auxiliary copper cash.For increasing before and after the auxiliary copper cash of electric current is arranged on Between the corresponding connection end of 2 connected second inductor loop conductors or the corresponding of front and rear 2 connected inductor loop conductors connects Connect between end, the auxiliary copper cash is to passing through welding between the second inductor loop conductor or the corresponding connection end of inductor loop conductor Or conducting resinl realizes electrical connection.
Further, the skeleton of the switch transformer also include the first space bar, the second space bar, the 3rd space bar, 4th space bar, the 5th space bar and insulation board.The periphery left part of principal part provided with a ring and lower ending opening the first space bar, First space bar and principal part, left limit plate shape are into boost voltage coil groove.In the middle part of the periphery of principal part provided with a ring and under The second space bar, the 3rd space bar, the 4th space bar and the 5th space bar of end opening, the second space bar, the 3rd space bar, Four space bars and the 5th space bar are spacedly distributed from left to right, so that the second space bar forms a left side with principal part, the first space bar Primary coil groove, the second space bar forms left secondary wire ring recess, the 4th space bar and principal part, the 3rd with principal part, the 3rd space bar Space bar formation degaussing coil groove, the 4th space bar and principal part, the 5th space bar form right secondary wire ring recess, the 5th space bar with Principal part, right limit plate shape are into right primary coil groove.Insulation board has 4, and insulation board is separately positioned on left secondary wire ring recess and right time The bottom front and rear sides of level coil groove, so that left secondary wire ring recess and right secondary wire ring recess take the shape of the letter U.
The present invention has positive effect:(1)The skeleton of the switch transformer of the present invention is by primary coil and secondary coil Separated by cell body insulation, traditional primary coil radially spaced-apart by insulating tape and secondary coil are become by groove Body is axially spaced, so that the radiating effect of switch transformer preferably, when using temperature less than traditional switch transformer 5 to 10 DEG C, service life is longer.
(2)Inductor loop conductor simple in construction of the present invention and manufacturing cost is relatively low, secondary coil is complete by circuit board Into loop connection, the sectional area of inductor loop conductor is much larger than copper cash, avoids the need for the copper cash of the more number of turns to wind, caloric value Smaller, radiating effect is excellent, and inductor loop conductor is directly welded on circuit board, considerably reduces switch transformer and electricity The manufacturing process flow of sense, further reduces cost, and the usage quantity of insulating tape can also greatly reduce in addition;Inductor loop is led The replacing of body is also more convenient, and whole switch transformer or inductance need not be changed when going wrong.Cause switch transformer simultaneously And the manufacture of intraocular of whole Switching Power Supply saves half man-hour, technique is relatively simple.
(3)The present invention solves the problem of overcurrent is too small by increasing auxiliary copper cash so that whole switch transformer The inductor loop coil of secondary coil and inductance by circuit board complete loop connect when it is more stable, whole Switching Power Supply it is steady It is qualitative more preferable.
Brief description of the drawings
Fig. 1 be embodiment 1 in switch transformer skeleton a kind of structural representation(Front view);
Fig. 2 is Fig. 1 top view;
Fig. 3 is Fig. 1 upward view;
A kind of schematic perspective view when Fig. 4 is from Fig. 1 left anterior-superior part;
A kind of schematic perspective view when Fig. 5 is from Fig. 1 right front lower place;
Fig. 6 be embodiment 2 in the switch transformer component with primary coil a kind of structural representation(Front view);
Fig. 7 is Fig. 6 upward view;
A kind of schematic perspective view when Fig. 8 is from Fig. 6 left anterior-superior part;
Fig. 9 be embodiment 3 in switch transformer a kind of structural representation(Front view);
Figure 10 is Fig. 9 upward view;
A kind of schematic perspective view when Figure 11 is from Fig. 9 left anterior-superior part;
Figure 12 be Figure 11 in magnetic core structural representation;
Figure 13 be Fig. 9 in inductor loop conductor structural representation;
Figure 14 is Figure 13 left view;
Figure 15 be Figure 11 in inductor loop conductor structural representation;
Figure 16 be embodiment 4 and 5 in Switching Power Supply a kind of structural representation(Electronic component is only shown in front view, figure Switch transformer and inductance);
A kind of schematic perspective view when Figure 17 is from Figure 16 left anterior-superior part;
Figure 18 is Figure 16 right view;
Figure 19 is from the switch transformer in Figure 16 when Figure 16 B is to from and the connection signal for aiding in copper cash in embodiment 6 Figure.
Mark in above-mentioned accompanying drawing is as follows:
Skeleton 1, principal part 11, magnetic loop hole 11-1, left limit plate 12-1, right limit plate 12-2, upper left limiting section 13-1, lower limit on the left The space bar of position portion 13-2, upper right limiting section 13-3, bottom right limiting section 13-4, first 14-1, the second space bar 14-2, the 3rd interval Plate 14-3, the 4th space bar 14-4, the 5th space bar 14-5, boost voltage coil groove 15-1, left primary coil groove 15-2, left time Level coil groove 15-3, degaussing coil groove 15-4, right secondary wire ring recess 15-5, right primary coil groove 15-6, insulation board 16, left stitch Connecting portion 17-1, primary coil stitch hole 17-1-1, auxiliary and degaussing coil stitch hole 17-1-2, left coil guide groove 17-1- 3, right stitch connecting portion 17-2, standby stitch hole 17-2-1,
Primary coil 2, degaussing coil 3, boost voltage coil 4, stitch 5, magnetic core 6, secondary coil 7, inductor loop conductor 71, Gu Determine adhesive plaster 8, shell 91, circuit board 92, inductance 93, magnet ring 93-1, the second inductor loop conductor 93-2, auxiliary copper cash 94.
Embodiment
When the present invention is described in progress orientation, it is described with orientation shown in Fig. 1, the orientation up and down in figure is in description In be also up and down, in figure the orientation of court of drawing institute be front, away from the orientation of drawing be rear.
(The skeleton of embodiment 1, switch transformer)
See Fig. 1 to Fig. 5, the skeleton 1 of the switch transformer of the present embodiment is the integral piece being made of bakelite material, skeleton 1 Center be principal part 11 in a tubular form, center being used for provided with left and right insertion of principal part 11 installs the magnetic loop hole 11-1 of magnetic core; The central symmetry of the left and right sides of principal part 11, which is provided with, to be used to install left limit plate 12-1 spacing during magnetic core, right limit plate 12- 2, left limit plate 12-1, right limit plate 12-2 are equipped with the through hole with the 11-1 insertions of magnetic loop hole, left limit plate 12-1 and right limit Position plate 12-2 is to remove the plate portion formed after a big cambered plate of grade, left limit by the circular slab provided with center through hole is symmetrical above and below Position plate 12-1's is symmetrical above and below provided with the upper left limiting section 13-1, the lower-left limiting section 13-2, right limit that protrude from left limit plate 12-1 Position plate 12-2's is symmetrical above and below provided with the upper right limiting section 13-3, the bottom right limiting section 13-4, upper left that protrude from right limit plate 12-2 Limiting section 13-1, upper right limiting section 13-3 are in isosceles triangle shape, and lower-left limiting section 13-2, bottom right limiting section 13-4 are in isosceles Triangle;The shape and switch transformer of left limit plate 12-1, upper left limiting section 13-1 and lower-left limiting section 13-2 formation Magnetic core correspondence, the shape and switch transformer of right limit plate 12-2, upper right limiting section 13-3 and bottom right limiting section 13-4 formation Magnetic core correspondence.The periphery left part of principal part 11 provided with a ring and lower ending opening the first space bar 14-1, first space bar 14-1 and principal part 11, left limit plate 12-1 formation boost voltage coil grooves 15-1;In the middle part of the periphery of principal part 11 provided with a ring and The second space bar 14-2, the 3rd space bar 14-3, the 4th space bar 14-4 and the 5th space bar 14-5 of lower ending opening, between second Dividing plate 14-2, the 3rd space bar 14-3, the 4th space bar 14-4 and the 5th space bar 14-5 are spacedly distributed from left to right, so that Second space bar 14-2 and principal part 11, the first space bar 14-1 form left primary coil groove 15-2, the second space bar 14-2 and master Portion 11, the 3rd space bar 14-3 form left secondary wire ring recess 15-3, the 4th space bar 14-4 and principal part 11, the 3rd space bar 14-3 Form degaussing coil groove 15-4, the 4th space bar 14-4 and form right secondary wire ring recess 15-5 with principal part 11, the 5th space bar 14-5, 5th space bar 14-5 and principal part 11, right limit plate 12-2 form right primary coil groove 15-6.Insulation board 16 has 4, left secondary Coil groove 15-3 and right secondary wire ring recess 15-5 bottom front and rear sides are equipped with 1 insulation board 16, so that left secondary wire ring recess 15-3 and right secondary wire ring recess 15-5 take the shape of the letter U.Lower-left limiting section 13-2 lower section is provided with left stitch connecting portion 17-1, and left stitch connects Socket part 17-1 lower end is provided with 5 stitch holes, including 2 primary coil stitch hole 17-1-1 and 3 auxiliary and degaussing coil It is spacedly distributed between stitch hole 17-1-2,5 stitch holes, provided with 4 left coil guide groove 17-1-3 between 5 stitch holes, The initiating terminal or clearing end of auxiliary and the corresponding boost voltage coils of degaussing coil stitch hole 17-1-2 and degaussing coil share one Individual stitch, so as to only need to 3 auxiliary and degaussing coil stitch hole 17-1-2.Bottom right limiting section 13-4 lower section is provided with right stitch Connecting portion 17-2, right stitch connecting portion 17-2 lower end are provided with 3 standby stitch hole 17-2-1 being spacedly distributed.
(Embodiment 2, the switch transformer component with primary coil)
See Fig. 6 to Fig. 8, the switch transformer component with primary coil of the present embodiment includes skeleton 1, primary coil 2, degaussing Coil 3, boost voltage coil 4 and stitch 5, the skeleton 1 use the skeleton of the switch transformer obtained by embodiment 1.Pin Pin 5 by 8, be respectively fixedly disposed at the left stitch connecting portion 17-1 of skeleton 12 primary coil stitch hole 17-1-1,3 it is auxiliary Help and degaussing coil stitch hole 17-1-2 and right stitch connecting portion 17-2 3 standby stitch hole 17-2-1 in.
Primary coil 2, degaussing coil 3, boost voltage coil 4 use conductor wire, and the present embodiment uses conductive copper wire;Just Level coil 2 be wrapped in the left primary coil groove 15-2 of skeleton 1 and right primary coil groove 15-6, the initiating terminal of primary coil 2 and Clearing end is welded to connect with the stitch 5 in left stitch connecting portion 17-1 2 primary coil stitch hole 17-1-1 respectively;Remove magnet-wire Circle 3 is wrapped in degaussing coil groove 15-4, and boost voltage coil 4 is wrapped in boost voltage coil groove 15-1, the He of degaussing coil 3 The initiating terminal or clearing end of boost voltage coil 4 share 1 in left stitch connecting portion 17-1 degaussing coil stitch hole 17-1-2 Individual stitch 5, so that the degaussing of the initiating terminal or clearing end of degaussing coil 3 and boost voltage coil 4 and left stitch connecting portion 17-1 Same 1 stitch 5 in coil stitch hole 17-1-2 is welded to connect, the other end of degaussing coil 3 and boost voltage coil 4 respectively with Stitch 5 in left stitch connecting portion 17-1 remaining 2 degaussing coil stitch hole 17-1-2 is welded to connect.Primary coil 2, go Coil is wrapped up using insulating tape in the equal insulation processing in the cross-contact position of magnetic coil 3 and boost voltage coil 4, the present embodiment Copper cash realizes insulation processing.
(Embodiment 3, switch transformer)
See Fig. 9 to Figure 11, the switch transformer of the present embodiment includes the switch transformation with primary coil obtained by embodiment 2 Device assembly, magnetic core 6, secondary coil 7 and fixed adhesive plaster 8.See Figure 12, the quantity of the magnetic core 6 is 2, using model EPC39 general magnetic core, magnetic core 6 makees paint-dipping process processing, the shape of the shape on the head of magnetic core 6 and the left or right of skeleton 1 Shape correspondence, the shape of the core of magnetic core 6 is corresponding with the magnetic loop hole 11-1 of skeleton 1.Still see Fig. 9 to Figure 11,26 points of magnetic cores Not from the left and right ends of skeleton 1 by its core insert magnetic loop hole 11-1 in up to the head of 2 magnetic cores 6 is respectively embedded into skeleton 1 Left side and right side in be arranged on so that magnetic core is spacing about 6 on skeleton 1, and formed magnetic loop;2 magnetic cores 6 by from It is circumferential to wind and be fixedly connected using fixed adhesive plaster 8, so that magnetic core 6 or so is installed on skeleton 1.
The circle of quantity 1 to 8 of secondary coil 8, includes 1 to 3 inductor loop conductor 71 per circle secondary coil 7;The present embodiment The quantity of middle secondary coil 7 is 2 circles, includes 1 inductor loop conductor 71 per circle secondary coil 7.See Figure 13 to Figure 15, inductance is returned Road conductor 71 is overall to be inverted U shape, and is made of copper material or copper clad aluminum material, and the copper material uses the preferable red copper of electric conductivity, electricity Feel the circular in cross-section or kidney ellipsoid of return conductors 71, its area of section is 0.5 to 10mm2, inductor loop in the present embodiment Circular in cross-section, the area of section of conductor 71 are 2mm2.Inverted U-shaped inductor loop conductor 71 has 2 connection ends.Still see figure 9 to Figure 11, the openings of sizes at 2 connection ends of inductor loop conductor 71 is corresponding with left secondary wire ring recess 15-3, inductor loop The height of conductor 71 is corresponding with left primary coil groove 15-2 height.2 circle secondary coils 7 are separately positioned on left secondary wire ring recess In 15-3 and right secondary wire ring recess 15-5, all inductor loop conductors 71 respectively by its opening through after the principal part 11 of skeleton 1 by Left secondary wire ring recess 15-3 or right secondary wires ring recess 15-5 is stretched out in its 2 connection ends, and the connection end of inductor loop conductor 71 is The initiating terminal and clearing end of secondary coil 7.When the switch transformer of the present embodiment is installed on circuit boards, by its 8 stitch 9 with And the connection end of all inductor loop conductors 71 through after the corresponding via of circuit board by way of slicker solder is welded and circuit board Electrical connection.
(Embodiment 4, Switching Power Supply)
See Figure 16 to Figure 18, the Switching Power Supply of the present embodiment includes shell 91, circuit board 92 and the switch obtained by embodiment 3 Transformer, circuit board 92 is the printed circuit board (PCB) for Switching Power Supply, and English name is PCB(Printed Circuit Board);The conductive copper foil for whole circuit is printed with circuit board 92.Circuit board 92 is arranged in shell 91.Circuit Switch transformer and all kinds of electronic components for Switching Power Supply are installed on plate 92(It is not shown in addition to inductance in figure).Open 8 stitch 5 of transformer are closed through being electrically connected by way of slicker solder is welded with circuit board 92 after the corresponding via of circuit board 92, 2 connection ends of all inductor loop conductors 71 of the secondary coil 7 of switch transformer are passed through after the corresponding via of circuit board 92 Electrically connected by way of slicker solder is welded with circuit board 92, so that switch transformer is fixedly connected on circuit board 92.Per circle Be connected in parallel between 1 to 3 inductor loop conductor 71 included by secondary coil 7 by circuit board 92, each circle secondary coil 7 it Between be connected in series by circuit board 92 so that each circle secondary coil 7 pass through circuit board 92 complete loop connect.
(Embodiment 5, Switching Power Supply)
Still see Figure 16 to Figure 18, the Switching Power Supply of the present embodiment is substantially the same manner as Example 4, and its difference is:Also include Inductance 93.Inductance 93 includes the magnet ring circle inductance coils of 93-1 and 1 to 25, and the magnet ring 93-1 surfaces are covered with insulating barrier;The electricity per circle Feeling coil includes the quantity of inductance coil in 1 to 3 second inductor loop conductor 93-2, the present embodiment for 4 circles, per circle inductor wire Circle includes 2 second inductor loop conductor 93-2;Second inductor loop conductor 93-2 is integrally inverted U shape, using copper material or copper-clad Aluminum is made, the copper material use the preferable red copper of electric conductivity, the second inductor loop conductor 93-2 circular in cross-section or Kidney ellipsoid, its area of section is 0.5 to 10mm2, the second inductor loop conductor 93-2 area of section is 2mm in the present embodiment2。 The second inverted U-shaped inductor loop conductor 93-2 has 2 connection ends.At second inductor loop conductor 93-2 2 connection ends Openings of sizes is corresponding with magnet ring 93-1 ring footpath, and the second inductor loop conductor 93-2 height is corresponding with magnet ring 93-1 height. All second inductor loop conductor 93-2 are open through after magnet ring 93-1 ring portion and magnet ring 93-1 tight fit connections by it respectively, 2 connection ends for the second inductor loop conductor 93-2 being enclosed on magnet ring 93-1 through circuit board 92 corresponding via after by lead The mode of tin welding is electrically connected with circuit board 92, and the second inductor loop conductor 93-2 is fixedly connected on circuit board 92, so that Magnet ring 93-1 is also spacing in the presence of the second inductor loop conductor 93-2 to be arranged on circuit board 92.Wrapped per circle inductance coil It is connected in parallel between 1 to the 3 second inductor loop conductor 93-2 included by circuit board 92, electricity is passed through between each circle inductance coil Road plate 92 is connected in series, and is connected so that each circle inductance coil completes loop by circuit board 92, each circle inductance coil surrounds magnet ring The equiangularly spaced distribution in 93-1 center.
(Embodiment 6, Switching Power Supply)
The Switching Power Supply of the present embodiment and embodiment 4 or 5 are essentially identical, and its difference is:Also include auxiliary copper cash 94, such as The overcurrent size of the copper-foil conducting electricity of circuit board 92 is inadequate, then front and rear 2 connected second inductor loop conductors in circuit Aided between 93-2 corresponding connection end or by increasing between the corresponding connection end of front and rear 2 connected inductor loop conductors 71 Copper cash 94 increases electric current, and the auxiliary copper cash 94 connects to the second inductor loop conductor 93-2 or the corresponding of inductor loop conductor 71 Connect by welding or conducting resinl realization electrical connection between holding, auxiliary copper cash 94 is arranged on solder side or the element surface side of circuit board 92 , the welding surface side for aiding in copper cash 94 to be arranged on circuit board 92 is seen in Figure 19, the present embodiment, and auxiliary copper cash 94 is arranged on switch Between the corresponding connection end of 2 inductor loop conductors 71 of the secondary coil 7 of transformer.
Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and is not to the present invention The restriction of embodiment.For those of ordinary skill in the field, it can also be made on the basis of the above description Its various forms of changes or variation.There is no necessity and possibility to exhaust all the enbodiments.And these belong to this hair Among the obvious changes or variations that bright spirit is extended out is still in protection scope of the present invention.

Claims (1)

1. a kind of switch transformer, it is characterised in that:Including switch transformer component, magnetic core with primary coil(6), it is secondary Coil(7)And fixed adhesive plaster(8);
Switch transformer component with primary coil includes skeleton(1), primary coil(2), degaussing coil(3), boost voltage Coil(4)And stitch(5);
Skeleton(1)Including centrally located principal part(11), be symmetricly set on principal part(11)The left and right sides magnetic core limiting section with And it is arranged on the stitch connecting portion of the lower section of corresponding magnetic core limiting section;Principal part(11)Center provided with left and right insertion be used for pacify Fill the magnetic loop hole of magnetic core(11-1);Magnetic core limiting section and principal part(11)Left and right insertion, and magnetic core limiting section and magnetic loop hole (11-1)Shape it is corresponding with the shape of magnetic core;Principal part(11)Periphery be sequentially provided with boost voltage coil groove vertically(15- 1), left primary coil groove(15-2), left secondary wire ring recess(15-3), degaussing coil groove(15-4), right secondary wire ring recess(15-5) With right primary coil groove(15-6), left secondary wire ring recess(15-3)And right secondary wire ring recess(15-5)Peripheral shape take the shape of the letter U;Pin Pin connecting portion includes being located at lower-left limiting section(13-2)Lower section left stitch connecting portion(17-1)With positioned at bottom right limiting section (13-4)Lower section right stitch connecting portion(17-2);Left stitch connecting portion(17-1)Lower end provided with 5 stitch holes, including 2 Individual primary coil stitch hole(17-1-1)And 3 auxiliary and degaussing coil stitch hole(17-1-2), between waiting between 5 stitch holes Provided with 4 left coil guide grooves between distribution, 5 stitch holes(17-1-3);Right stitch connecting portion(17-2)Lower end be provided with 3 standby stitch holes being spacedly distributed(17-2-1);
Stitch(5)By 8, skeleton is respectively fixedly disposed at(1)Left stitch connecting portion(17-1)2 primary coil stitch holes (17-1-1), 3 auxiliary and degaussing coil stitch hole(17-1-2)With right stitch connecting portion(17-2)3 standby stitch holes (17-2-1)It is interior;
Primary coil(2), degaussing coil(3), boost voltage coil(4)Use conductor wire;Primary coil(2)It is wrapped in skeleton (1)Left primary coil groove(15-2)And right primary coil groove(15-6)It is interior, primary coil(2)Initiating terminal and clearing end difference With left stitch connecting portion(17-1)2 primary coil stitch holes(17-1-1)Interior stitch(5)It is welded to connect;Degaussing coil (3)It is wrapped in degaussing coil groove(15-4)It is interior, boost voltage coil(4)It is wrapped in boost voltage coil groove(15-1)It is interior, degaussing Coil(3)With boost voltage coil(4)Initiating terminal or clearing end share left stitch connecting portion(17-1)Degaussing coil stitch 1 stitch in the 17-1-2 of hole(5), so that degaussing coil(3)With boost voltage coil(4)Initiating terminal or clearing end and left pin Pin connecting portion(17-1)Degaussing coil stitch hole 17-1-2 in same 1 stitch(5)It is welded to connect, degaussing coil(3)With it is auxiliary Help potential winding(4)The other end respectively with left stitch connecting portion(17-1)Remaining 2 degaussing coil stitch hole 17-1-2 Interior stitch(5)It is welded to connect;Primary coil(2), degaussing coil(3)With boost voltage coil(4)Cross-contact position it is equal Insulation processing;
The magnetic core(6)Quantity be 2, magnetic core(6)Make paint-dipping process processing, magnetic core(6)Head shape and skeleton(1) Left or right shape correspondence, magnetic core(6)Core shape and skeleton(1)Magnetic loop hole(11-1)Correspondence;2 magnetic Core(6)Respectively from skeleton(1)Left and right ends magnetic loop hole is inserted by its core(11-1)In until 2 magnetic cores(6)Head It is respectively embedded into skeleton(1)Left side and right side in so that magnetic core(6)It is spacing up and down to be arranged on skeleton(1)On, and form magnetic Loop;2 magnetic cores(6)By using fixed adhesive plaster from circumferential(8)Wind and be fixedly connected, so that by magnetic core(6)Left and right is spacing Installed in skeleton(1)On;
The circle of quantity 1 to 8 of secondary coil 8, per circle secondary coil(7)Including 1 to 3 inductor loop conductor(71);Inductor loop Conductor(71)Entirety is inverted U shape, and is made of copper material or aluminum core copper wire or aluminum, and the copper material is preferably purple using electric conductivity Copper, inductor loop conductor(71)Circular in cross-section or kidney ellipsoid, its area of section be 0.5 to 10mm2;Inverted U-shaped inductance Return conductors(71)With 2 connection ends;Inductor loop conductor(71)2 connection ends at openings of sizes and left secondary coil Groove(15-3)Correspondence, inductor loop conductor(71)Height and left primary coil groove(15-2)Height correspondence;2 circle secondary coils (7)It is separately positioned on left secondary wire ring recess(15-3)With right secondary wire ring recess(15-5)It is interior, all inductor loop conductors(71)Point It is not open by it through skeleton(1)Principal part(11)Afterwards left secondary wire ring recess is stretched out by its 2 connection ends(15-3)Or right secondary Coil groove(15-5), inductor loop conductor(71)Connection end be secondary coil(7)Initiating terminal and clearing end.
CN201710474587.3A 2015-03-04 2015-03-04 Switch transformer Active CN107221418B (en)

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CN107221418B (en) 2019-03-19
CN107481838B (en) 2020-05-01
CN107481838A (en) 2017-12-15
CN107221419A (en) 2017-09-29
CN104681253A (en) 2015-06-03
CN104681253B (en) 2017-06-13

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