CN107481838B - Switch transformer assembly with primary coil and switch power supply - Google Patents
Switch transformer assembly with primary coil and switch power supply Download PDFInfo
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- CN107481838B CN107481838B CN201710474385.9A CN201710474385A CN107481838B CN 107481838 B CN107481838 B CN 107481838B CN 201710474385 A CN201710474385 A CN 201710474385A CN 107481838 B CN107481838 B CN 107481838B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F17/00—Fixed inductances of the signal type
- H01F17/04—Fixed inductances of the signal type with magnetic core
- H01F17/06—Fixed inductances of the signal type with magnetic core with core substantially closed in itself, e.g. toroid
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2876—Cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
- H01F27/292—Surface mounted devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS 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
- H02M1/00—Details of apparatus for conversion
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coils Or Transformers For Communication (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to a switching transformer assembly with a primary coil and a switching power supply. The circuit board is mounted within the housing. The switching transformer includes a switching transformer assembly having a primary coil, a magnetic core, a secondary coil, and a fixing tape. A switching transformer assembly having a primary coil includes a bobbin, a primary coil, a demagnetization coil, an auxiliary voltage coil, and a pin. The number of secondary windings 8 is 1 to 8 turns, each turn comprising 1 to 3 inductive loop conductors. The whole inductance loop conductor is in an inverted U shape; the pin of the switch transformer is electrically connected with the circuit board, and 2 connecting ends of all inductive loop conductors of the secondary coil of the switch transformer penetrate through corresponding through holes of the circuit board and then are electrically connected with the circuit board in a lead-tin welding mode. And the secondary coils of all turns complete loop connection through the circuit board.
Description
The application has the following application numbers: 201510096673.6 entitled "switch transformer and switch power supply", filed as follows: divisional application of the invention patent application on 3/4/2015.
Technical Field
The present invention relates to a switching power supply, and more particularly, to a switching power supply equipped with a high-frequency switching transformer.
Background
With the high-speed development of power electronic technology, the power electronic equipment has increasingly close relationship with the work and life of people, electronic equipment can not be switched off from a reliable power supply, the power supply of computers in the 80 s is comprehensively changed into a switching power supply, the power supply of computers is firstly replaced, the switching power supply enters the fields of various electronic and electrical equipment in the 90 s, the switching power supply is widely used in a program-controlled exchanger, a communication, an electronic detection equipment power supply, a control equipment power supply and the like, and the rapid development of the switching power supply technology is promoted.
Generally, a switching power supply includes a rectangular case made of aluminum alloy or steel and a printed circuit board fixed in the case, and a heat dissipation device such as a heat dissipation fin or a fan is further provided between the case and the circuit board, and the switching power supply can be fixed to an electronic device by a fastening member such as a screw and a screw hole provided in the case of the switching power supply. Electronic components such as a high-frequency switch transformer, an inductor and the like are installed on a circuit board, the high-frequency switch transformer mainly comprises a framework, a magnetic core penetrating through the framework, a primary winding and a secondary winding installed on the framework, the primary winding and the secondary winding are wound on the framework in a coil mode, the secondary winding is formed by winding a whole circle of copper wire for one circle to complete a loop, the primary winding and the secondary winding are radially distributed, the whole circle of wound coil generates a large amount of heat, the electronic components have a poor heat dissipation effect due to the fact that multiple circles of winding are wound, in addition, in order to facilitate winding of the coil, the diameter of the coil needs to be designed to be small, the toughness of the coil is good to complete the winding, the number of turns of the coil needs to be increased if the diameter of the coil is small, the number of turns of the coil is increased, the winding process is also, the manufacturing labor cost is too high, and when problems such as aging and breakage occur at a certain part of the coil, the whole switching transformer needs to be replaced. In addition, the secondary coil wound by the whole circle needs to use more insulating tapes in the aspect of insulation design, and the cost is higher. For example, the PQ35 switch transformer widely sold in the market has the above disadvantages.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a switching transformer and a switching power supply which have simple structures and lower manufacturing costs, have good heat dissipation effects and are convenient to maintain.
One of technical solutions for achieving the object of the present invention is to provide a framework of a switching transformer, which includes a main portion located at the center, magnetic core limiting portions symmetrically disposed at the left and right sides of the main portion, and pin connecting portions disposed below the corresponding magnetic core limiting portions. The center of the main part is provided with a magnetic circuit hole which is penetrated left and right and used for installing a magnetic core. The magnetic core limiting portion is communicated with the main portion in the left-right direction, and the shapes of the magnetic core limiting portion and the magnetic circuit hole correspond to the shape of the magnetic core. The outer periphery of the main part is sequentially provided with an auxiliary voltage coil slot, a left primary coil slot, a left secondary coil slot, a demagnetizing coil slot, a right secondary coil slot and a right primary coil slot along the axial direction, and the outer peripheries of the left secondary coil slot and the right secondary coil slot are U-shaped. The stitch connecting part is provided with a stitch hole with a downward opening and used for mounting a stitch.
Further, the magnetic core limiting part located on the left side of the main part comprises a left limiting plate, an upper left limiting part and a lower left limiting part, and the magnetic core limiting part located on the right side of the main part comprises a right limiting plate, an upper right limiting part and a lower right limiting part. The left limiting plate and the right limiting plate are both provided with through holes communicated with the magnetic circuit holes, the left limiting plate and the right limiting plate are plate parts formed by a circular plate provided with a central through hole and an equal-size arched plate which is removed from the circular plate in an up-down symmetrical mode, the left upper limiting part and the left lower limiting part protrude out of the left limiting plate in an up-down symmetrical mode, the right upper limiting part and the right lower limiting part protrude out of the right limiting plate in an up-down symmetrical mode, the left upper limiting part and the right upper limiting part are in inverted isosceles triangle shapes, and the left lower limiting part and the right lower limiting part are in isosceles triangle shapes. The left limit plate, the left upper limit portion, and the left lower limit portion are formed in shapes corresponding to the magnetic core of the switching transformer, and the right limit plate, the right upper limit portion, and the right lower limit portion are formed in shapes corresponding to the magnetic core of the switching transformer.
Furthermore, the framework of the switching transformer further comprises a first partition plate, a second partition plate, a third partition plate, a fourth partition plate, a fifth partition plate and an insulating plate. The periphery left part of main part is equipped with and is annular and lower extreme open-ended first space bar, first space bar forms auxiliary voltage coil groove with main part, left limiting plate. The periphery middle part of main portion is equipped with and is annular and lower extreme open-ended second partition board, partition board between the third, fourth partition board and fifth partition board, second partition board, partition board between the third, fourth partition board and fifth partition board are by left-to-right equal interval distribution, thereby second partition board and main portion, first partition board forms left primary coil groove, second partition board and main portion, partition board between the third form left secondary coil groove, fourth partition board and main portion, partition board between the third form demagnetization coil groove, fourth partition board and main portion, fifth partition board form right secondary coil groove, fifth partition board and main portion, right spacing board form right primary coil groove. The number of the insulation plates is 4, the insulation plates are respectively arranged on the front side and the rear side of the lower portion of the left secondary coil slot and the lower portion of the right secondary coil slot, and therefore the left secondary coil slot and the right secondary coil slot are U-shaped.
Further, the stitch connecting portion includes a left stitch connecting portion located below the left lower positioning portion and a right stitch connecting portion located below the right lower positioning portion. The lower extreme of left side stitch connecting portion is equipped with 5 stitch holes, including 2 primary coil stitch holes and 3 supplementary and demagnetization coil stitch holes, equidistant distribution between 5 stitch holes is equipped with 4 left side coil guide ways between 5 stitch holes. The lower extreme of right stitch connecting portion is equipped with 3 spare stitch holes of equal interval distribution.
The second technical solution for achieving the object of the present invention is to provide a switching transformer assembly with a primary coil, which includes a bobbin, a primary coil, a demagnetization coil, an auxiliary voltage coil and pins.
The skeleton is including the main part that is located the center, the symmetrical magnetic core that sets up in the left and right sides of main part spacing portion and set up the stitch connecting portion in the below of the spacing portion of corresponding magnetic core. The center of the main part is provided with a magnetic circuit hole which is penetrated left and right and used for installing a magnetic core. The magnetic core limiting portion is communicated with the main portion in the left-right direction, and the shapes of the magnetic core limiting portion and the magnetic circuit hole correspond to the shape of the magnetic core. The outer periphery of the main part is sequentially provided with an auxiliary voltage coil slot, a left primary coil slot, a left secondary coil slot, a demagnetizing coil slot, a right secondary coil slot and a right primary coil slot along the axial direction, and the outer peripheries of the left secondary coil slot and the right secondary coil slot are U-shaped. The stitch connecting part comprises a left stitch connecting part positioned below the left lower limiting part and a right stitch connecting part positioned below the right lower limiting part. The lower extreme of left side stitch connecting portion is equipped with 5 stitch holes, including 2 primary coil stitch holes and 3 supplementary and demagnetization coil stitch holes, equidistant distribution between 5 stitch holes is equipped with 4 left side coil guide ways between 5 stitch holes. The lower extreme of right stitch connecting portion is equipped with 3 spare stitch holes of equal interval distribution.
The stitch is by 8, respectively fixed 2 primary coil stitch holes, 3 supplementary and demagnetization coil stitch holes and the 3 reserve stitch holes of right stitch connecting portion that set up at the left stitch connecting portion of skeleton.
The primary coil, the demagnetization coil and the auxiliary voltage coil are all made of conductive wires. Primary coil twines in the left primary coil groove and the right primary coil inslot of skeleton, primary coil's initiating terminal and termination end respectively with the stitch welded connection in 2 primary coil stitch holes of left stitch connecting portion. The demagnetization coil is wound in the demagnetization coil groove, the auxiliary voltage coil is wound in the auxiliary voltage coil groove, the starting end or the terminating end of the demagnetization coil and the auxiliary voltage coil share 1 pin in the demagnetization coil pin hole 17-1-2 of the left pin connecting part, so that the starting end or the terminating end of the demagnetization coil and the auxiliary voltage coil are welded and connected with the same 1 pin in the demagnetization coil pin hole 17-1-2 of the left pin connecting part, and the other ends of the demagnetization coil and the auxiliary voltage coil are respectively welded and connected with the pins in the rest 2 demagnetization coil pin holes 17-1-2 of the left pin connecting part. The cross contact parts of the primary coil, the demagnetization coil and the auxiliary voltage coil are subjected to insulation treatment.
The third technical scheme for achieving the aim of the invention is to provide a switching transformer, which comprises a switching transformer component with a primary coil, a magnetic core, a secondary coil and a fixing adhesive tape.
A switching transformer assembly having a primary coil includes a bobbin, a primary coil, a demagnetization coil, an auxiliary voltage coil, and a pin.
The skeleton is including the main part that is located the center, the symmetrical magnetic core that sets up in the left and right sides of main part spacing portion and set up the stitch connecting portion in the below of the spacing portion of corresponding magnetic core. The center of the main part is provided with a magnetic circuit hole which is penetrated left and right and used for installing a magnetic core. The magnetic core limiting portion is communicated with the main portion in the left-right direction, and the shapes of the magnetic core limiting portion and the magnetic circuit hole correspond to the shape of the magnetic core. The outer periphery of the main part is sequentially provided with an auxiliary voltage coil slot, a left primary coil slot, a left secondary coil slot, a demagnetizing coil slot, a right secondary coil slot and a right primary coil slot along the axial direction, and the outer peripheries of the left secondary coil slot and the right secondary coil slot are U-shaped. The stitch connecting part comprises a left stitch connecting part positioned below the left lower limiting part and a right stitch connecting part positioned below the right lower limiting part. The lower extreme of left side stitch connecting portion is equipped with 5 stitch holes, including 2 primary coil stitch holes and 3 supplementary and demagnetization coil stitch holes, equidistant distribution between 5 stitch holes is equipped with 4 left side coil guide ways between 5 stitch holes. The lower extreme of right stitch connecting portion is equipped with 3 spare stitch holes of equal interval distribution.
The stitch is by 8, respectively fixed 2 primary coil stitch holes, 3 supplementary and demagnetization coil stitch holes and the 3 reserve stitch holes of right stitch connecting portion that set up at the left stitch connecting portion of skeleton.
The primary coil, the demagnetization coil and the auxiliary voltage coil are all made of conductive wires. Primary coil twines in the left primary coil groove and the right primary coil inslot of skeleton, primary coil's initiating terminal and termination end respectively with the stitch welded connection in 2 primary coil stitch holes of left stitch connecting portion. The demagnetization coil is wound in the demagnetization coil groove, the auxiliary voltage coil is wound in the auxiliary voltage coil groove, the starting end or the terminating end of the demagnetization coil and the auxiliary voltage coil share 1 pin in the demagnetization coil pin hole 17-1-2 of the left pin connecting part, so that the starting end or the terminating end of the demagnetization coil and the auxiliary voltage coil are welded and connected with the same 1 pin in the demagnetization coil pin hole 17-1-2 of the left pin connecting part, and the other ends of the demagnetization coil and the auxiliary voltage coil are respectively welded and connected with the pins in the rest 2 demagnetization coil pin holes 17-1-2 of the left pin connecting part. The cross contact parts of the primary coil, the demagnetization coil and the auxiliary voltage coil are subjected to insulation treatment.
The quantity of magnetic core is 2, and the magnetic core is done the dip coating technology and is handled, and the shape of the head of magnetic core corresponds with the shape of the left end of skeleton or right-hand member, and the shape of the core of magnetic core corresponds with the magnetic circuit hole of skeleton. 2 magnetic cores insert in the magnetic circuit hole by its core respectively from the left and right sides both ends of skeleton until 2 magnetic cores's head imbeds respectively in the left end face and the right-hand member face of skeleton to the magnetic core is spacing setting up on the skeleton from top to bottom, and forms the magnetic circuit. 2 magnetic cores are through using fixed adhesive tape to wind and fixed connection from circumference to spacing installation about with the magnetic core is on the skeleton.
The number of secondary windings 8 is 1 to 8 turns, each turn comprising 1 to 3 inductive loop conductors. The whole inductance loop conductor is in an inverted U shape and is made of copper material or copper-coated aluminum material or aluminum material, the copper material is red copper with good conductivity, the cross section of the inductance loop conductor is in a round shape or a waist-round shape, and the cross section area of the inductance loop conductor is 0.5-10 mm2. The inductance loop conductor of the inverted U shape has 2 connection terminals. The opening size at 2 connecting ends of the inductance loop conductor corresponds to the left secondary coil slot, and the height of the inductance loop conductor corresponds to the height of the left primary coil slot. The 2 turns of secondary coils are respectively arranged in the left secondary coil slot and the right secondary coil slot, all inductance loop conductors respectively penetrate through the main part of the framework through the openings of the inductance loop conductors and then extend out of the left secondary coil slot or the right secondary coil slot through 2 connecting ends of the inductance loop conductors, and the connecting ends of the inductance loop conductors are the starting end and the terminating end of the secondary coils.
The fourth technical scheme for achieving the purpose of the invention is to provide a switching power supply, which comprises a shell, a circuit board and various electronic components, including a switching transformer, which are arranged on the circuit board and are used for the switching power supply. The circuit board has printed thereon a copper foil for electrical conduction used for the entire circuit. The circuit board is mounted within the housing.
The switching transformer includes a switching transformer assembly having a primary coil, a magnetic core, a secondary coil, and a fixing tape.
A switching transformer assembly having a primary coil includes a bobbin, a primary coil, a demagnetization coil, an auxiliary voltage coil, and a pin.
The skeleton is including the main part that is located the center, the symmetrical magnetic core that sets up in the left and right sides of main part spacing portion and set up the stitch connecting portion in the below of the spacing portion of corresponding magnetic core. The center of the main part is provided with a magnetic circuit hole which is penetrated left and right and used for installing a magnetic core. The magnetic core limiting portion is communicated with the main portion in the left-right direction, and the shapes of the magnetic core limiting portion and the magnetic circuit hole correspond to the shape of the magnetic core. The outer periphery of the main part is sequentially provided with an auxiliary voltage coil slot, a left primary coil slot, a left secondary coil slot, a demagnetizing coil slot, a right secondary coil slot and a right primary coil slot along the axial direction, and the outer peripheries of the left secondary coil slot and the right secondary coil slot are U-shaped. The stitch connecting part comprises a left stitch connecting part positioned below the left lower limiting part and a right stitch connecting part positioned below the right lower limiting part. The lower extreme of left side stitch connecting portion is equipped with 5 stitch holes, including 2 primary coil stitch holes and 3 supplementary and demagnetization coil stitch holes, equidistant distribution between 5 stitch holes is equipped with 4 left side coil guide ways between 5 stitch holes. The lower extreme of right stitch connecting portion is equipped with 3 spare stitch holes of equal interval distribution.
The stitch is by 8, respectively fixed 2 primary coil stitch holes, 3 supplementary and demagnetization coil stitch holes and the 3 reserve stitch holes of right stitch connecting portion that set up at the left stitch connecting portion of skeleton.
The primary coil, the demagnetization coil and the auxiliary voltage coil are all made of conductive wires. Primary coil twines in the left primary coil groove and the right primary coil inslot of skeleton, primary coil's initiating terminal and termination end respectively with the stitch welded connection in 2 primary coil stitch holes of left stitch connecting portion. The demagnetization coil is wound in the demagnetization coil groove, the auxiliary voltage coil is wound in the auxiliary voltage coil groove, the starting end or the terminating end of the demagnetization coil and the auxiliary voltage coil share 1 pin in the demagnetization coil pin hole 17-1-2 of the left pin connecting part, so that the starting end or the terminating end of the demagnetization coil and the auxiliary voltage coil are welded and connected with the same 1 pin in the demagnetization coil pin hole 17-1-2 of the left pin connecting part, and the other ends of the demagnetization coil and the auxiliary voltage coil are respectively welded and connected with the pins in the rest 2 demagnetization coil pin holes 17-1-2 of the left pin connecting part. The cross contact parts of the primary coil, the demagnetization coil and the auxiliary voltage coil are subjected to insulation treatment.
The quantity of magnetic core is 2, and the magnetic core is done the dip coating technology and is handled, and the shape of the head of magnetic core corresponds with the shape of the left end of skeleton or right-hand member, and the shape of the core of magnetic core corresponds with the magnetic circuit hole of skeleton. 2 magnetic cores insert in the magnetic circuit hole by its core respectively from the left and right sides both ends of skeleton until 2 magnetic cores's head imbeds respectively in the left end face and the right-hand member face of skeleton to the magnetic core is spacing setting up on the skeleton from top to bottom, and forms the magnetic circuit. 2 magnetic cores are through using fixed adhesive tape to wind and fixed connection from circumference to spacing installation about with the magnetic core is on the skeleton.
The number of secondary windings 8 is 1 to 8 turns, each turn comprising 1 to 3 inductive loop conductors. The whole inductance loop conductor is in an inverted U shape and is made of copper material or copper-coated aluminum material or aluminum material, the copper material is red copper with good conductivity, the cross section of the inductance loop conductor is in a round shape or a waist-round shape, and the cross section area of the inductance loop conductor is 0.5-10 mm2. The inductance loop conductor of the inverted U shape has 2 connection terminals. The opening size at 2 connecting ends of the inductance loop conductor corresponds to the left secondary coil slot, and the height of the inductance loop conductor corresponds to the height of the left primary coil slot. The 2 turns of secondary coils are respectively arranged in the left secondary coil slot and the right secondary coil slot, all inductance loop conductors respectively penetrate through the main part of the framework through the openings of the inductance loop conductors and then extend out of the left secondary coil slot or the right secondary coil slot through 2 connecting ends of the inductance loop conductors, and the connecting ends of the inductance loop conductors are the starting end and the terminating end of the secondary coils.
8 pins of the switch transformer penetrate through corresponding via holes of the circuit board and then are electrically connected with the circuit board in a lead-tin welding mode, and 2 connecting ends of all inductive loop conductors of a secondary coil of the switch transformer penetrate through corresponding via holes of the circuit board and then are electrically connected with the circuit board in a lead-tin welding mode, so that the switch transformer is fixedly connected on the circuit board. 1 to 3 inductance loop conductors included in each turn of secondary coil are connected in parallel through the circuit board, and the turns of secondary coils are connected in series through the circuit board, so that the turns of secondary coils complete loop connection through the circuit board.
Further, the electronic component mounted on the circuit board further includes an inductor. The inductor comprises a magnetic ring and 1-25 turns of inductance coils, and an insulating layer is covered on the surface of the magnetic ring. Each turn of the inductor comprises 1 to 3 second inductor loop conductors. The second inductance loop conductor is integrally in an inverted U shape and is made of copper material or copper-coated aluminum material or aluminum material, the copper material is red copper with good conductivity, the cross section of the second inductance loop conductor is in a round shape or a waist-round shape, and the cross section area of the second inductance loop conductor is 0.5-10 mm2. Falling downThe second, U-shaped inductor loop conductor has 2 connection terminals. The size of the opening at 2 connecting ends of the second inductance loop conductor corresponds to the ring diameter of the magnetic ring, and the height of the second inductance loop conductor corresponds to the height of the magnetic ring. All the second inductance loop conductors respectively penetrate through the ring part of the magnetic ring through openings of the second inductance loop conductors and then are connected with the magnetic ring in a tight fit mode, 2 connecting ends of the second inductance loop conductors sleeved on the magnetic ring penetrate through corresponding through holes of the circuit board and then are electrically connected with the circuit board in a lead-tin welding mode, the second inductance loop conductors are fixedly connected to the circuit board, and therefore the magnetic ring is also arranged on the circuit board in a limiting mode under the action of the second inductance loop conductors. 1 to 3 second inductance loop conductors included in each turn of inductance coil are connected in parallel through the circuit board, and all turns of inductance coils are connected in series through the circuit board, so that all turns of inductance coils complete loop connection through the circuit board, and all turns of inductance coils are distributed around the center of the magnetic ring at equal angular intervals.
Still further, the switching power supply further includes an auxiliary copper line. And the auxiliary copper wire for increasing the current is arranged between the corresponding connecting ends of the 2 second inductance loop conductors connected in front and back or between the corresponding connecting ends of the 2 inductance loop conductors connected in front and back, and the electric connection between the auxiliary copper wire and the corresponding connecting ends of the second inductance loop conductors or the inductance loop conductors is realized through welding or conductive adhesive.
Furthermore, the framework of the switching transformer further comprises a first partition plate, a second partition plate, a third partition plate, a fourth partition plate, a fifth partition plate and an insulating plate. The periphery left part of main part is equipped with and is annular and lower extreme open-ended first space bar, first space bar forms auxiliary voltage coil groove with main part, left limiting plate. The periphery middle part of main portion is equipped with and is annular and lower extreme open-ended second partition board, partition board between the third, fourth partition board and fifth partition board, second partition board, partition board between the third, fourth partition board and fifth partition board are by left-to-right equal interval distribution, thereby second partition board and main portion, first partition board forms left primary coil groove, second partition board and main portion, partition board between the third form left secondary coil groove, fourth partition board and main portion, partition board between the third form demagnetization coil groove, fourth partition board and main portion, fifth partition board form right secondary coil groove, fifth partition board and main portion, right spacing board form right primary coil groove. The number of the insulation plates is 4, the insulation plates are respectively arranged on the front side and the rear side of the lower portion of the left secondary coil slot and the lower portion of the right secondary coil slot, and therefore the left secondary coil slot and the right secondary coil slot are U-shaped.
The invention has the positive effects that: (1) the primary coil and the secondary coil are separated through the slot body in an insulating mode by the framework of the switch transformer, and the traditional primary coil and the traditional secondary coil which are separated radially through the insulating tape are separated axially through the slot body, so that the heat dissipation effect of the switch transformer is good, the temperature is lower than that of the traditional switch transformer by 5-10 ℃ when the switch transformer is used, and the service life is long.
(2) The inductance loop conductor is simple in structure and low in manufacturing cost, the secondary coil completes loop connection through the circuit board, the sectional area of the inductance loop conductor is far larger than that of a copper wire, and therefore the inductance loop conductor does not need to be wound by a plurality of circles of copper wires, the heat productivity is small, the heat dissipation effect is excellent, the inductance loop conductor is directly welded on the circuit board, the manufacturing process flows of a switch transformer and an inductor are greatly reduced, the cost is further reduced, and in addition, the using number of the insulating tapes can also be greatly reduced; the inductor loop conductor is convenient to replace, and the whole switch transformer or inductor does not need to be replaced when a problem occurs. Meanwhile, the manufacturing labor of the switch transformer and the whole switch power supply is saved by half, and the process is simpler.
(3) The invention solves the problem of small overcurrent by adding the auxiliary copper wire, so that the secondary coil of the whole switch transformer and the inductive loop coil of the inductor are more stable when the loop connection is completed through the circuit board, and the stability of the whole switch power supply is better.
Drawings
Fig. 1 is a schematic structural view (front view) of a bobbin of a switching transformer in embodiment 1;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a bottom view of FIG. 1;
FIG. 4 is a perspective view from the front left upper side of FIG. 1;
FIG. 5 is a perspective view from the front right below of FIG. 1;
fig. 6 is a schematic structural view (front view) of a switching transformer assembly having a primary coil according to embodiment 2;
FIG. 7 is a bottom view of FIG. 6;
FIG. 8 is a perspective view from the front left upper side of FIG. 6;
fig. 9 is a schematic structural view (front view) of a switching transformer in embodiment 3;
FIG. 10 is a bottom view of FIG. 9;
FIG. 11 is a perspective view from the front left upper side of FIG. 9;
FIG. 12 is a schematic diagram of the core of FIG. 11;
fig. 13 is a schematic diagram of the structure of the inductor loop conductor of fig. 9;
FIG. 14 is a left side view of FIG. 13;
fig. 15 is a schematic diagram of the structure of the inductor loop conductor of fig. 11;
fig. 16 is a schematic structural diagram of the switching power supply in embodiments 4 and 5 (front view, electronic components only show a switching transformer and an inductor);
FIG. 17 is a perspective view from the front left upper side of FIG. 16;
FIG. 18 is a right side view of FIG. 16;
fig. 19 is a schematic diagram showing the connection between the switching transformer in fig. 16 and the auxiliary copper wire in example 6 when viewed from direction B of fig. 16.
The reference numbers in the above figures are as follows:
a bobbin 1, a main portion 11, a magnetic circuit hole 11-1, a left stopper plate 12-1, a right stopper plate 12-2, an upper left stopper 13-1, a lower left stopper 13-2, an upper right stopper 13-3, a lower right stopper 13-4, a first spacer plate 14-1, a second spacer plate 14-2, a third spacer plate 14-3, a fourth spacer plate 14-4, a fifth spacer plate 14-5, an auxiliary voltage coil slot 15-1, a left primary coil slot 15-2, a left secondary coil slot 15-3, a demagnetization coil slot 15-4, a right secondary coil slot 15-5, a right primary coil slot 15-6, an insulation plate 16, a left stitch connecting portion 17-1, a primary coil stitch hole 17-1-1, an auxiliary and demagnetization coil hole 17-1-2, a left coil guide groove 17-1-3, a right stitch connecting part 17-2, a spare stitch hole 17-2-1,
the transformer comprises a primary coil 2, a demagnetization coil 3, an auxiliary voltage coil 4, a pin 5, a magnetic core 6, a secondary coil 7, an inductance loop conductor 71, a fixing adhesive tape 8, a shell 91, a circuit board 92, an inductor 93, a magnetic ring 93-1, a second inductance loop conductor 93-2 and an auxiliary copper wire 94.
Detailed Description
When describing the orientation, the present invention is described with the orientation shown in fig. 1, the top, bottom, left and right orientations in the drawing are also top, bottom, left and right in the description, the orientation facing the drawing in the drawing is the front, and the orientation departing from the drawing is the back.
(embodiment 1, framework of switching transformer)
Referring to fig. 1 to 5, a framework 1 of the switching transformer of the present embodiment is an integral member made of bakelite, a main portion 11 having a tubular shape is disposed in the center of the framework 1, and a magnetic circuit hole 11-1 for installing a magnetic core is disposed in the center of the main portion 11 and penetrates left and right; the center of the left side and the right side of the main part 11 is symmetrically provided with a left limit plate 12-1 and a right limit plate 12-2 for limiting when installing a magnetic core, the left limit plate 12-1 and the right limit plate 12-2 are both provided with through holes communicated with the magnetic circuit hole 11-1, the left limit plate 12-1 and the right limit plate 12-2 are plate parts formed by a circular plate provided with a central through hole and an equal size arch plate which is symmetrically removed from the upper and lower parts, the left limit plate 12-1 is symmetrically provided with a left upper limit part 13-1 and a left lower limit part 13-2 which protrude from the left limit plate 12-1, the right limit plate 12-2 is symmetrically provided with a right upper limit part 13-3 and a right lower limit part 13-4 which protrude from the right limit plate 12-2, the left upper limit part 13-1 and the right upper limit part 13-3 are in an inverted isosceles triangle shape, the left lower limit part 13-2 and the right lower limit part 13-4 are in an isosceles triangle shape; the left limit plate 12-1, the left upper limit portion 13-1 and the left lower limit portion 13-2 are formed in shapes corresponding to the magnetic core of the switching transformer, and the right limit plate 12-2, the right upper limit portion 13-3 and the right lower limit portion 13-4 are formed in shapes corresponding to the magnetic core of the switching transformer. The left part of the periphery of the main part 11 is provided with a first annular partition plate 14-1 with an opening at the lower end, and the first partition plate 14-1, the main part 11 and the left limit plate 12-1 form an auxiliary voltage coil groove 15-1; the middle part of the outer periphery of the main part 11 is provided with a second partition plate 14-2, a third partition plate 14-3, a fourth partition plate 14-4 and a fifth partition plate 14-5 which are annular and have openings at the lower ends, the second partition plate 14-2, the third partition plate 14-3, the fourth partition plate 14-4 and the fifth partition plate 14-5 are distributed at equal intervals from left to right, so that the second partition plate 14-2, the main part 11 and the first partition plate 14-1 form a left primary coil slot 15-2, the second partition plate 14-2, the main part 11 and the third partition plate 14-3 form a left secondary coil slot 15-3, the fourth partition plate 14-4, the main part 11 and the third partition plate 14-3 form a demagnetization coil slot 15-4, the fourth partition plate 14-4, the main part 11 and the fifth partition plate 14-5 form a right secondary coil slot 15-5, the fifth partition plate 14-5, the main part 11 and the right limit plate 12-2 form a right primary coil groove 15-6. The number of the insulating plates 16 is 4, and the front side and the rear side of the lower parts of the left secondary coil slot 15-3 and the right secondary coil slot 15-5 are respectively provided with 1 insulating plate 16, so that the left secondary coil slot 15-3 and the right secondary coil slot 15-5 are U-shaped. A left stitch connecting part 17-1 is arranged below the left lower limiting part 13-2, 5 stitch holes are arranged at the lower end of the left stitch connecting part 17-1 and comprise 2 primary coil stitch holes 17-1-1 and 3 auxiliary and demagnetizing coil stitch holes 17-1-2, 5 stitch holes are distributed at equal intervals, 4 left coil guide grooves 17-1-3 are arranged between the 5 stitch holes, and an auxiliary voltage coil corresponding to the auxiliary and demagnetizing coil stitch hole 17-1-2 and the starting end or the terminating end of the demagnetizing coil share one stitch, so that only 3 auxiliary and demagnetizing coil stitch holes 17-1-2 are needed. The lower part of the right lower limit part 13-4 is provided with a right stitch connecting part 17-2, and the lower end of the right stitch connecting part 17-2 is provided with 3 spare stitch holes 17-2-1 which are distributed at equal intervals.
(embodiment 2, switching transformer assembly with primary coil)
Referring to fig. 6 to 8, the switching transformer assembly with a primary coil of the present embodiment includes a bobbin 1, a primary coil 2, a demagnetization coil 3, an auxiliary voltage coil 4, and a pin 5, and the bobbin 1 adopts the bobbin of the switching transformer obtained from embodiment 1. The number of the stitches 5 is 8, and the stitches are respectively and fixedly arranged in 2 primary stitch holes 17-1-1 of a left stitch connecting part 17-1 of the framework 1, 3 auxiliary and demagnetizing stitch holes 17-1-2 of the auxiliary and demagnetizing stitch holes 17-1 and 3 standby stitch holes 17-2-1 of a right stitch connecting part 17-2.
The primary coil 2, the demagnetization coil 3 and the auxiliary voltage coil 4 are all made of conductive wires, and the embodiment adopts conductive copper wires; the primary coil 2 is wound in a left primary coil groove 15-2 and a right primary coil groove 15-6 of the framework 1, and the starting end and the terminating end of the primary coil 2 are respectively connected with pins 5 in 2 primary coil pin holes 17-1-1 of the left pin connecting part 17-1 in a welding manner; the demagnetization coil 3 is wound in the demagnetization coil groove 15-4, the auxiliary voltage coil 4 is wound in the auxiliary voltage coil groove 15-1, the starting ends or the terminating ends of the demagnetization coil 3 and the auxiliary voltage coil 4 share 1 pin 5 in the demagnetization coil pin hole 17-1-2 of the left pin connecting part 17-1, so that the starting ends or the terminating ends of the demagnetization coil 3 and the auxiliary voltage coil 4 are in welding connection with 1 pin 5 in the demagnetization coil pin hole 17-1-2 of the left pin connecting part 17-1, and the other ends of the demagnetization coil 3 and the auxiliary voltage coil 4 are in welding connection with the pins 5 in the rest 2 demagnetization coil pin holes 17-1-2 of the left pin connecting part 17-1 respectively. The cross contact parts of the primary coil 2, the demagnetization coil 3 and the auxiliary voltage coil 4 are all subjected to insulation treatment, and in the embodiment, the coil copper wires are wrapped by the insulation tapes to realize the insulation treatment.
(embodiment 3, switching Transformer)
Referring to fig. 9 to 11, the switching transformer of the present embodiment includes the switching transformer assembly having the primary coil obtained from embodiment 2, a magnetic core 6, a secondary coil 7, and a fixing tape 8. Referring to fig. 12, the number of the magnetic cores 6 is 2, the magnetic cores 6 are processed by a dip coating process by using a general-purpose magnetic core with the model of EPC39, the shape of the head of the magnetic core 6 corresponds to the shape of the left end or the right end of the bobbin 1, and the shape of the core of the magnetic core 6 corresponds to the magnetic circuit hole 11-1 of the bobbin 1. Still referring to fig. 9 to 11, 2 magnetic cores 6 are respectively inserted into the magnetic circuit hole 11-1 from the left and right ends of the frame 1 through the core parts thereof until the head parts of the 2 magnetic cores 6 are respectively embedded into the left end surface and the right end surface of the frame 1, so that the magnetic cores 6 are vertically limited and arranged on the frame 1 and form a magnetic circuit; the 2 magnetic cores 6 are fixedly connected by being wound with the fixing adhesive tapes 8 from the circumferential direction, so that the magnetic cores 6 are limited and mounted on the framework 1 from the left to the right.
The number of secondary coils 8 is 1 to 8 turns, each turn of secondary coil 7 comprising 1 to 3 inductive loop conductors 71; the number of secondary windings 7 in this embodiment is 2 turns, each turn of secondary winding 7 comprising 1 inductive loop conductor 71. Referring to fig. 13 to 15, the inductance loop conductor 71 is entirely in an inverted U shape and made of copper material or copper-clad aluminum material, the copper material is red copper with good conductivity, the cross section of the inductance loop conductor 71 is in a circular or oval shape, and the cross-sectional area is 0.5 to 10mm2In this embodiment, the cross section of the inductor loop conductor 71 is circular and the cross-sectional area is 2mm2. The inverted U-shaped inductive loop conductor 71 has 2 connection terminals. Still referring to fig. 9-11, the opening size at the 2 connection ends of the inductor loop conductor 71 corresponds to the left secondary coil slot 15-3, and the height of the inductor loop conductor 71 corresponds to the height of the left primary coil slot 15-2. The 2-turn secondary coil 7 is respectively arranged in the left secondary coil slot 15-3 and the right secondary coil slot 15-5, all the inductance loop conductors 71 respectively penetrate through the main part 11 of the framework 1 from the openings and then extend out of the left secondary coil slot 15-3 or the right secondary coil slot 15-5 from 2 connecting ends of the inductance loop conductors, and the connecting ends of the inductance loop conductors 71 are the starting end and the terminating end of the secondary coil 7. When the switch transformer of the embodiment is installed on the circuit board, 8 pins 9 and the connection ends of all the inductive loop conductors 71 pass through the corresponding through holes of the circuit board and then are electrically connected with the circuit board by lead-tin soldering.
(embodiment 4, switching power supply)
Referring to fig. 16 to 18, the switching power supply of the present embodiment includes a housing 91, a circuit board 92, and the switching transformer obtained in embodiment 3, where the circuit board 92 is a printed circuit board for the switching power supply, and is known by the english name pcb (printed circuit board); the circuit board 92 has printed thereon a copper foil for electrical conduction used for the entire circuit. The circuit board 92 is mounted in the housing 91. The circuit board 92 is mounted with a switching transformer and various electronic components (not shown except for an inductor) for switching power supply. 8 pins 5 of the switch transformer penetrate through corresponding through holes of the circuit board 92 and then are electrically connected with the circuit board 92 in a lead-tin welding mode, and 2 connecting ends of all inductive loop conductors 71 of the secondary coil 7 of the switch transformer penetrate through corresponding through holes of the circuit board 92 and then are electrically connected with the circuit board 92 in a lead-tin welding mode, so that the switch transformer is fixedly connected on the circuit board 92. 1 to 3 inductive loop conductors 71 included in each turn of the secondary coil 7 are connected in parallel through the circuit board 92, and the turns of the secondary coil 7 are connected in series through the circuit board 92, so that the turns of the secondary coil 7 complete loop connection through the circuit board 92.
(embodiment 5, switching Power supply)
Still referring to fig. 16 to 18, the switching power supply of the present embodiment is substantially the same as embodiment 4, except that: also included is an inductor 93. The inductor 93 comprises a magnetic ring 93-1 and 1 to 25 turns of inductance coils, and an insulating layer is covered on the surface of the magnetic ring 93-1; each turn of the inductance coil comprises 1 to 3 second inductance loop conductors 93-2, the number of the inductance coil is 4 turns in the embodiment, and each turn of the inductance coil comprises 2 second inductance loop conductors 93-2; the second inductance loop conductor 93-2 is in an inverted U shape integrally and is made of copper material or copper-clad aluminum material, the copper material is red copper with good conductivity, the cross section of the second inductance loop conductor 93-2 is in a round shape or a waist-round shape, and the cross section area is 0.5-10 mm2In this embodiment, the cross-sectional area of the second inductor loop conductor 93-2 is 2mm2. The second inductor loop conductor 93-2 of the inverted U shape has 2 connection terminals. The size of the opening at 2 connection ends of the second inductance loop conductor 93-2 corresponds to the loop diameter of the magnetic loop 93-1, and the height of the second inductance loop conductor 93-2 corresponds to the height of the magnetic loop 93-1. All the second inductance loop conductors 93-2 respectively penetrate through the ring part of the magnetic ring 93-1 through openings thereof and then are in tight fit connection with the magnetic ring 93-1, 2 connecting ends of the second inductance loop conductors 93-2 sleeved on the magnetic ring 93-1 penetrate through corresponding through holes of the circuit board 92 and then are electrically connected with the circuit board 92 in a lead-tin welding mode, and the second inductance loop conductors 93-2 are fixedly connected on the circuit board 92, so that the magnetic ring 93-1 is also in limited arrangement on the circuit board 92 under the action of the second inductance loop conductors 93-2. 1 to 3 second inductance loop conductors 93-2 included in each turn of inductance coil are connected in parallel through a circuit board 92, and the turns of inductance coils are connected in series through the circuit board 92, so that the turns of inductance coils complete loop connection through the circuit board 92, and the turns of inductance coils surround the center of the magnetic ring 93-1 at equal anglesAre distributed at intervals.
(embodiment 6, switching power supply)
The switching power supply of the present embodiment is substantially the same as that of embodiment 4 or 5, except that: and an auxiliary copper wire 94, wherein if the overcurrent of the conductive copper foil of the circuit board 92 is insufficient, the current is increased by adding the auxiliary copper wire 94 between the corresponding connection ends of the 2 second inductor loop conductors 93-2 connected in series or between the corresponding connection ends of the 2 inductor loop conductors 71 connected in series, the auxiliary copper wire 94 is electrically connected with the corresponding connection ends of the second inductor loop conductors 93-2 or the inductor loop conductors 71 by welding or conductive adhesive, the auxiliary copper wire 94 is disposed on the welding surface or the component surface side of the circuit board 92, see fig. 19, the auxiliary copper wire 94 is disposed on the welding surface side of the circuit board 92, and the auxiliary copper wire 94 is disposed between the corresponding connection ends of the 2 inductor loop conductors 71 of the secondary winding 7 of the switching transformer.
It should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And such obvious variations or modifications which fall within the spirit of the invention are intended to be covered by the scope of the present invention.
Claims (2)
1. A switching transformer assembly having a primary winding, characterized by: comprises a framework (1), a primary coil (2), a demagnetization coil (3), an auxiliary voltage coil (4) and a pin (5);
the framework (1) comprises a main part (11) positioned in the center, magnetic core limiting parts symmetrically arranged on the left side and the right side of the main part (11) and pin connecting parts arranged below the corresponding magnetic core limiting parts; a magnetic circuit hole (11-1) which is penetrated left and right and used for installing a magnetic core is arranged in the center of the main part (11); the magnetic core limiting part is communicated with the main part (11) in the left-right direction, and the shapes of the magnetic core limiting part and the magnetic circuit hole (11-1) correspond to the shape of the magnetic core; the outer periphery of the main part (11) is sequentially provided with an auxiliary voltage coil slot (15-1), a left primary coil slot (15-2), a left secondary coil slot (15-3), a demagnetization coil slot (15-4), a right secondary coil slot (15-5) and a right primary coil slot (15-6) along the axial direction, and the outer peripheries of the left secondary coil slot (15-3) and the right secondary coil slot (15-5) are U-shaped; the stitch connecting parts comprise a left stitch connecting part (17-1) positioned below the left lower limiting part (13-2) and a right stitch connecting part (17-2) positioned below the right lower limiting part (13-4); the lower end of the left stitch connecting part (17-1) is provided with 5 stitch holes which comprise 2 primary coil stitch holes (17-1-1) and 3 auxiliary and demagnetizing coil stitch holes (17-1-2), the 5 stitch holes are distributed at equal intervals, and 4 left coil guide grooves (17-1-3) are arranged between the 5 stitch holes; the lower end of the right stitch connecting part (17-2) is provided with 3 spare stitch holes (17-2-1) which are distributed at equal intervals;
8 pins (5) are respectively and fixedly arranged in 2 primary coil pin holes (17-1-1) of a left pin connecting part (17-1) of the framework (1), 3 auxiliary and demagnetizing coil pin holes (17-1-2) and 3 standby pin holes (17-2-1) of a right pin connecting part (17-2);
the primary coil (2), the demagnetization coil (3) and the auxiliary voltage coil (4) are all made of conductive wires; the primary coil (2) is wound in a left primary coil groove (15-2) and a right primary coil groove (15-6) of the framework (1), and the starting end and the terminating end of the primary coil (2) are respectively connected with a stitch (5) in 2 primary coil stitch holes (17-1-1) of the left stitch connecting part (17-1) in a welding manner; the demagnetization coil (3) is wound in the demagnetization coil groove (15-4), the auxiliary voltage coil (4) is wound in the auxiliary voltage coil groove (15-1), the starting end or the ending end of the demagnetization coil (3) and the auxiliary voltage coil (4) share 1 pin (5) in the auxiliary pin hole (17-1-2) of the left pin connecting part (17-1), therefore, the starting end or the terminating end of the demagnetization coil (3) and the auxiliary voltage coil (4) is connected with 1 pin (5) in the auxiliary pin hole (17-1-2) of the left pin connecting part (17-1) in a welding way, and the other ends of the demagnetization coil (3) and the auxiliary voltage coil (4) are respectively connected with the pins (5) in the rest 2 auxiliary pin holes (17-1-2) of the left pin connecting part (17-1) in a welding way; the cross contact parts of the primary coil (2), the demagnetization coil (3) and the auxiliary voltage coil (4) are all subjected to insulation treatment.
2. A switching power supply, characterized by: the power supply comprises a shell (91), a circuit board (92) and various electronic components which are arranged on the circuit board (92) and used for a switching power supply, wherein the electronic components comprise a switching transformer; a copper foil for electric conduction used for the whole circuit is printed on the circuit board (92); the circuit board (92) is mounted in the housing (91);
the switching transformer comprises a switching transformer assembly with a primary coil, a magnetic core (6), a secondary coil (7) and a fixing adhesive tape (8);
the switch transformer assembly with the primary coil comprises a framework (1), the primary coil (2), a demagnetization coil (3), an auxiliary voltage coil (4) and a pin (5);
the framework (1) comprises a main part (11) positioned in the center, magnetic core limiting parts symmetrically arranged on the left side and the right side of the main part (11) and pin connecting parts arranged below the corresponding magnetic core limiting parts; a magnetic circuit hole (11-1) which is penetrated left and right and used for installing a magnetic core is arranged in the center of the main part (11); the magnetic core limiting part is communicated with the main part (11) in the left-right direction, and the shapes of the magnetic core limiting part and the magnetic circuit hole (11-1) correspond to the shape of the magnetic core; the outer periphery of the main part (11) is sequentially provided with an auxiliary voltage coil slot (15-1), a left primary coil slot (15-2), a left secondary coil slot (15-3), a demagnetization coil slot (15-4), a right secondary coil slot (15-5) and a right primary coil slot (15-6) along the axial direction, and the outer peripheries of the left secondary coil slot (15-3) and the right secondary coil slot (15-5) are U-shaped; the stitch connecting parts comprise a left stitch connecting part (17-1) positioned below the left lower limiting part (13-2) and a right stitch connecting part (17-2) positioned below the right lower limiting part (13-4); the lower end of the left stitch connecting part (17-1) is provided with 5 stitch holes which comprise 2 primary coil stitch holes (17-1-1) and 3 auxiliary and demagnetizing coil stitch holes (17-1-2), the 5 stitch holes are distributed at equal intervals, and 4 left coil guide grooves (17-1-3) are arranged between the 5 stitch holes; the lower end of the right stitch connecting part (17-2) is provided with 3 spare stitch holes (17-2-1) which are distributed at equal intervals;
8 pins (5) are respectively and fixedly arranged in 2 primary coil pin holes (17-1-1) of a left pin connecting part (17-1) of the framework (1), 3 auxiliary and demagnetizing coil pin holes (17-1-2) and 3 standby pin holes (17-2-1) of a right pin connecting part (17-2);
the primary coil (2), the demagnetization coil (3) and the auxiliary voltage coil (4) are all made of conductive wires; the primary coil (2) is wound in a left primary coil groove (15-2) and a right primary coil groove (15-6) of the framework (1), and the starting end and the terminating end of the primary coil (2) are respectively connected with a stitch (5) in 2 primary coil stitch holes (17-1-1) of the left stitch connecting part (17-1) in a welding manner; the demagnetization coil (3) is wound in the demagnetization coil groove (15-4), the auxiliary voltage coil (4) is wound in the auxiliary voltage coil groove (15-1), the starting end or the ending end of the demagnetization coil (3) and the auxiliary voltage coil (4) share 1 pin (5) in the auxiliary pin hole (17-1-2) of the left pin connecting part (17-1), therefore, the starting end or the terminating end of the demagnetization coil (3) and the auxiliary voltage coil (4) is connected with 1 pin (5) in the auxiliary pin hole (17-1-2) of the left pin connecting part (17-1) in a welding way, and the other ends of the demagnetization coil (3) and the auxiliary voltage coil (4) are respectively connected with the pins (5) in the rest 2 auxiliary pin holes (17-1-2) of the left pin connecting part (17-1) in a welding way; the crossed contact parts of the primary coil (2), the demagnetization coil (3) and the auxiliary voltage coil (4) are subjected to insulation treatment;
the number of the magnetic cores (6) is 2, the magnetic cores (6) are treated by a paint dipping process, the shape of the head parts of the magnetic cores (6) corresponds to the shape of the left end or the right end of the framework (1), and the shape of the core parts of the magnetic cores (6) corresponds to the magnetic circuit hole (11-1) of the framework (1); 2 magnetic cores (6) are respectively inserted into the magnetic loop hole (11-1) from the left end and the right end of the framework (1) through the core parts until the head parts of the 2 magnetic cores (6) are respectively embedded into the left end surface and the right end surface of the framework (1), so that the magnetic cores (6) are vertically limited on the framework (1) and form a magnetic loop; 2 magnetic cores (6) are wound by using a fixing adhesive tape (8) from the circumferential direction and fixedly connected, so that the magnetic cores (6) are limited and mounted on the framework (1) from left to right;
the number of secondary coils is 1 to 8 turns, each turn of secondary coil (7) comprising 1 to 3 inductive loop conductors (71); the inductance loop conductor (71) is in an inverted U shape integrally and is made of copper material or copper-coated aluminum material or aluminum material, the copper material is red copper with good conductivity, the cross section of the inductance loop conductor (71) is in a round shape or a waist-round shape, and the cross section area of the inductance loop conductor is 0.5-10 mm2(ii) a The inductance loop conductor (71) of the inverted U shape has 2 connection ends; the size of the opening of the 2 connecting ends of the inductance loop conductor (71) corresponds to the left secondary coil slot (15-3), and the height of the inductance loop conductor (71) corresponds to the height of the left primary coil slot (15-2); 2 turns of secondary coils (7) are respectively arranged in a left secondary coil slot (15-3) and a right secondary coil slot (15-5), all inductance loop conductors (71) respectively penetrate through a main part (11) of the framework (1) from openings of the inductance loop conductors and then extend out of the left secondary coil slot (15-3) or the right secondary coil slot (15-5) from 2 connecting ends of the inductance loop conductors, and the connecting ends of the inductance loop conductors (71) are the starting end and the terminating end of the secondary coils (7);
8 pins (5) of the switch transformer penetrate through corresponding through holes of the circuit board (92) and then are electrically connected with the circuit board (92) in a lead-tin welding mode, and 2 connecting ends of all inductance loop conductors (71) of a secondary coil (7) of the switch transformer penetrate through corresponding through holes of the circuit board (92) and then are electrically connected with the circuit board (92) in a lead-tin welding mode, so that the switch transformer is fixedly connected on the circuit board (92); 1 to 3 inductance loop conductors (71) included by each turn of secondary coil (7) are connected in parallel through a circuit board (92), and the turns of secondary coils (7) are connected in series through the circuit board (92), so that the turns of secondary coils (7) complete loop connection through the circuit board (92);
the mounting is on the circuitThe electronic components on the board (92) further comprise an inductor (93); the inductor (93) comprises a magnetic ring (93-1) and 1-25 turns of inductance coils, and an insulating layer is covered on the surface of the magnetic ring (93-1); each turn of the inductor comprises 1 to 3 second inductor loop conductors (93-2); the second inductance loop conductor (93-2) is integrally in an inverted U shape and is made of copper material or copper-coated aluminum material or aluminum material, the copper material is red copper with good conductivity, the cross section of the second inductance loop conductor (93-2) is circular or oval, and the cross section area of the second inductance loop conductor is 0.5-10 mm2(ii) a The second inductance loop conductor (93-2) of the reverse U shape has 2 connection ends; the size of an opening at 2 connecting ends of the second inductance loop conductor (93-2) corresponds to the ring diameter of the magnetic ring (93-1), and the height of the second inductance loop conductor (93-2) corresponds to the height of the magnetic ring (93-1); all the second inductance loop conductors (93-2) respectively penetrate through the ring part of the magnetic ring (93-1) through openings of the second inductance loop conductors and then are in tight fit connection with the magnetic ring (93-1), 2 connecting ends of the second inductance loop conductors (93-2) sleeved on the magnetic ring (93-1) penetrate through corresponding through holes of the circuit board (92) and then are electrically connected with the circuit board (92) in a lead-tin welding mode, the second inductance loop conductors (93-2) are fixedly connected to the circuit board (92), and therefore the magnetic ring (93-1) is also limited and arranged on the circuit board (92) under the action of the second inductance loop conductors (93-2); 1 to 3 second inductance loop conductors (93-2) included in each turn of inductance coil are connected in parallel through a circuit board (92), and all turns of inductance coils are connected in series through the circuit board (92), so that all turns of inductance coils complete loop connection through the circuit board (92), and all turns of inductance coils are distributed around the center of the magnetic ring (93-1) at equal angular intervals;
the switching power supply further comprises an auxiliary copper wire (94); an auxiliary copper wire (94) for increasing current is arranged between corresponding connecting ends of 2 second inductance loop conductors (93-2) connected in front and back or between corresponding connecting ends of 2 inductance loop conductors (71) connected in front and back, and the auxiliary copper wire (94) is electrically connected with the corresponding connecting ends of the second inductance loop conductors (93-2) or the inductance loop conductors (71) through welding or conductive adhesive;
the framework (1) of the switching transformer further comprises a first partition plate (14-1), a second partition plate (14-2), a third partition plate (14-3), a fourth partition plate (14-4), a fifth partition plate (14-5) and an insulating plate (16); a first annular partition plate (14-1) with an opening at the lower end is arranged at the left part of the outer periphery of the main part (11), and an auxiliary voltage coil groove (15-1) is formed by the first partition plate (14-1), the main part (11) and the left limiting plate (12-1); the middle part of the outer periphery of the main part (11) is provided with a second partition plate (14-2), a third partition plate (14-3), a fourth partition plate (14-4) and a fifth partition plate (14-5) which are annular and have openings at the lower ends, the second partition plate (14-2), the third partition plate (14-3), the fourth partition plate (14-4) and the fifth partition plate (14-5) are distributed at equal intervals from left to right, so that the second partition plate (14-2), the main part (11) and the first partition plate (14-1) form a left primary coil groove (15-2), the second partition plate (14-2), the main part (11) and the third partition plate (14-3) form a left secondary coil groove (15-3), the fourth partition plate (14-4), the main part (11) and the third partition plate (14-3) form a demagnetizing coil groove (15-4), the fourth partition plate (14-4), the main part (11) and the fifth partition plate (14-5) form a right secondary coil groove (15-5), and the fifth partition plate (14-5), the main part (11) and the right limiting plate (12-2) form a right primary coil groove (15-6); the number of the insulating plates (16) is 4, and the insulating plates (16) are respectively arranged on the front side and the rear side of the lower parts of the left secondary coil slot (15-3) and the right secondary coil slot (15-5), so that the left secondary coil slot (15-3) and the right secondary coil slot (15-5) are U-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710474385.9A CN107481838B (en) | 2015-03-04 | 2015-03-04 | Switch transformer assembly with primary coil and switch power supply |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710474385.9A CN107481838B (en) | 2015-03-04 | 2015-03-04 | Switch transformer assembly with primary coil and switch power supply |
| CN201510096673.6A CN104681253B (en) | 2015-03-04 | 2015-03-04 | Switch transformer and Switching Power Supply |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510096673.6A Division CN104681253B (en) | 2015-03-04 | 2015-03-04 | Switch transformer and Switching Power Supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107481838A CN107481838A (en) | 2017-12-15 |
| CN107481838B true CN107481838B (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710474881.4A Active CN107221419B (en) | 2015-03-04 | 2015-03-04 | Framework of switch transformer and switch power supply |
| CN201710474385.9A Active CN107481838B (en) | 2015-03-04 | 2015-03-04 | Switch transformer assembly with primary coil and switch power supply |
| CN201710474587.3A Active CN107221418B (en) | 2015-03-04 | 2015-03-04 | Switch transformer |
| CN201510096673.6A Expired - Fee Related CN104681253B (en) | 2015-03-04 | 2015-03-04 | Switch transformer and Switching Power Supply |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710474881.4A Active CN107221419B (en) | 2015-03-04 | 2015-03-04 | Framework of switch transformer and switch power supply |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710474587.3A Active CN107221418B (en) | 2015-03-04 | 2015-03-04 | Switch transformer |
| CN201510096673.6A Expired - Fee Related CN104681253B (en) | 2015-03-04 | 2015-03-04 | Switch transformer and Switching Power Supply |
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| Country | Link |
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| CN (4) | CN107221419B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106683853B (en) * | 2017-03-17 | 2020-10-02 | 艾德克斯电子（南京）有限公司 | Transformer framework, transformer connecting circuit and switching power supply |
| CN107452485A (en) * | 2017-09-08 | 2017-12-08 | 天宝电子（惠州）有限公司 | A kind of assembly type transformer |
| US12046412B2 (en) | 2018-06-22 | 2024-07-23 | Lg Innotek Co., Ltd. | Transformer |
| CN108831708A (en) * | 2018-07-31 | 2018-11-16 | 遂宁普思电子有限公司 | integrated LLC transformer |
| CN108933022B (en) * | 2018-08-24 | 2024-02-27 | 海盐爱建股份有限公司 | Ignition coil with stable structure |
| CN114823096B (en) * | 2022-06-25 | 2022-10-21 | 深圳市万志宇科技有限公司 | Electronic transformer with anti-creeping function |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104681253A (en) | 2015-06-03 |
| CN107481838A (en) | 2017-12-15 |
| CN107221419A (en) | 2017-09-29 |
| CN107221418B (en) | 2019-03-19 |
| CN107221419B (en) | 2019-03-19 |
| CN104681253B (en) | 2017-06-13 |
| CN107221418A (en) | 2017-09-29 |
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