CN114156067B

CN114156067B - Power transformer through VDE and CB test

Info

Publication number: CN114156067B
Application number: CN202111344319.2A
Authority: CN
Inventors: 王斌
Original assignee: Wuxi Jinglei Electronic Co ltd
Current assignee: Wuxi Jinglei Electronic Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2023-06-02
Anticipated expiration: 2041-11-12
Also published as: CN114156067A

Abstract

The invention discloses a power transformer passing VDE and CB tests, which comprises a magnetic core, wherein two sides of the magnetic core are respectively provided with a framework structure, the framework structure comprises a main beam, the top of the main beam is fixedly connected with side baffles, two ends of the magnetic core are respectively and fixedly connected with the two side baffles, one bottom of the main beam is fixedly connected with a first bulge, a second bulge, a third bulge, a fourth bulge, a fifth bulge and a sixth bulge, and the bottom of the main beam is fixedly connected with a seventh bulge, an eighth bulge, a ninth bulge, a tenth bulge, an eleventh bulge and a twelfth bulge. According to the invention, by using a plurality of turnover adhesive tapes and wrapping adhesive tapes, under the condition that the primary and secondary safety distances pass through the VDE requirement, the primary and secondary sides are on the same side, so that the miniaturization of products is ensured, the absolute safety distance is ensured, the cost of the products is reduced, and the market competitiveness is improved.

Description

Power transformer through VDE and CB test

Technical Field

The invention relates to the technical field of power transformers, in particular to a power transformer passing VDE and CB tests.

Background

The power transformers are all arranged in household appliances such as refrigerators and the like, are soft magnetic electromagnetic elements and have the functions of power transmission, voltage transformation and insulation isolation, and are widely applied to power supply technology and power electronic technology.

Under the condition that the primary and secondary safety distances are ensured to pass through the VDE requirement, the primary and secondary can not be realized on the same side, and in order to ensure the absolute safety distance, the product volume is required to be increased, the product cost is increased, and the market competitiveness is weaker.

Therefore, it is necessary to invent a power transformer that passes VDE, CB tests to solve the above problems.

Disclosure of Invention

The invention aims to provide a power transformer passing VDE and CB tests, which solves the problems that the prior power transformer cannot realize that primary and secondary are on the same side under the condition that the primary and secondary safety distance passes the VDE requirement in the prior art, and the product volume is required to be increased to ensure the absolute safety distance, the product cost is increased, and the market competitiveness is weaker.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides a power transformer through VDE, CB test, includes the magnetic core, the magnetic core both sides all are equipped with skeleton texture, skeleton texture includes the main beam, main beam top fixedly connected with side shield, the magnetic core both ends respectively with two side shield fixed connection, one of them main beam bottom fixedly connected with first arch, second arch, third arch, fourth arch, fifth arch and sixth arch, another main beam bottom fixedly connected with seventh arch, eighth arch, ninth arch, tenth arch, eleventh arch and twelfth arch, two main beam one side all is pasted first tape of rolling over in main beam one side, the winding of magnetic core outside is provided with first primary winding group, first primary winding group outside is pasted and is had first parcel sticky tape, first parcel sticky tape outside winding is provided with second primary winding group, two first sticky tape one end all turns over in second primary winding group surface, second primary winding group outside is pasted and is had the second and is wrapped up, another second tape outside is provided with the third tape of rolling over winding group outside fixedly connected with seventh arch, eighth winding, ninth winding, eleventh winding is provided with first tape of rolling over in second primary winding group, second tape outside is pasted and is rolled over the fourth winding group outside and is provided with first primary winding group outside, second tape of rolling over the fourth winding group outside is pasted and is provided with first primary winding tape of rolling over the fourth winding group, second primary winding group outside is pasted and is provided with the fourth primary winding tape outside.

Preferably, the first stitch of protruding bottom fixedly connected with, the second stitch of protruding bottom fixedly connected with of second, the fourth stitch of protruding bottom fixedly connected with of fourth, the fifth stitch of protruding bottom fixedly connected with of fifth, the sixth stitch of protruding bottom fixedly connected with of sixth, the seventh stitch of the protruding bottom fixedly connected with of seventh, the eighth stitch of protruding bottom fixedly connected with of eighth, the ninth stitch of protruding bottom fixedly connected with of ninth, the eleventh stitch of protruding bottom fixedly connected with of eleventh, the twelfth stitch of protruding bottom fixedly connected with of twelfth, can be used to connect the wire winding group both ends between the stitch.

Preferably, one end of the first primary winding group is connected with the fourth pin, the other end of the first primary winding group is connected with the ninth pin, one end of the second primary winding group is clamped between the fifth protrusion and the sixth protrusion, the other end of the second primary winding group is clamped between the seventh protrusion and the eighth protrusion, and two adjacent protrusions can be clamped at two ends of the winding group.

Preferably, one end of the third secondary winding group is clamped between the second protrusion and the third protrusion, the other end of the third secondary winding group is clamped between the tenth protrusion and the eleventh protrusion, one end of the fourth secondary winding group is clamped between the first protrusion and the second protrusion, and the other end of the fourth secondary winding group is clamped between the eleventh protrusion and the twelfth protrusion.

Preferably, one end of the fifth primary winding group is connected to a fifth pin, and the other end of the first primary winding group is connected to an eighth pin.

Preferably, the two surfaces of the main beam are provided with a plurality of air outlets, the air outlets are respectively corresponding to the first protrusion, the second protrusion, the third protrusion, the fourth protrusion, the fifth protrusion, the sixth protrusion, the seventh protrusion, the eighth protrusion, the ninth protrusion, the tenth protrusion, the eleventh protrusion and the twelfth protrusion, and the air outlets can reduce pin displacement when soldering tin is carried out on the product.

Preferably, the bottoms of the first bulge, the sixth bulge, the seventh bulge and the twelfth bulge are fixedly connected with supporting feet, the cross section of each supporting foot is right triangle, the two ends of the second primary winding group, the third secondary winding group and the fourth secondary winding group are fixedly sleeved with sleeves, the sleeves are made of rubber materials, and the clamping tightness of the two ends of the winding groups can be improved by the aid of the arrangement of the sleeves.

Preferably, the magnetic core is made of EE30 type soft magnetic ferrite material, the framework structure is made of A3X2G5 material, the EE30 type soft magnetic ferrite material has the basic characteristics of low price, low coercive force, high resistivity and high magnetic permeability, the characteristic temperature resistance of the A3X2G5 material reaches 130 ℃, CTI is higher than 600, the flame retardant grade is the highest HB grade, and a glow wire test can pass 750 ℃/850 ℃.

In the technical scheme, the invention has the technical effects and advantages that:

1. by using a plurality of turnover adhesive tapes and wrapping adhesive tapes, under the condition that the primary and secondary safety distance passes through the VDE requirement, the primary and secondary are on the same side, thereby ensuring miniaturization of the product, ensuring absolute safety distance, reducing the distance from the primary and secondary to the magnetic core, enabling the product to be miniaturized as much as possible, having small volume, light weight, reduced cost and having more competitiveness;

2. by arranging the air outlet holes at the stitch positions, the stitch shift can be reduced when the product is soldered, and the air outlet holes are arranged on the premise of ensuring the VDE safety distance, so that the qualification rate of the product can be effectively improved.

Drawings

FIG. 1 is a first view of a magnetic core and two skeletal structures connection structure of the present invention;

FIG. 2 is a second view of the connection structure of the magnetic core and two skeletal structures of the present invention;

FIG. 3 is a schematic illustration of the attachment of a first folded over tape of the present invention;

FIG. 4 is a schematic view of an installation of a first primary winding of the present invention;

fig. 5 is a schematic view of the installation of a second primary winding set of the present invention;

FIG. 6 is a schematic illustration of the attachment of a fourth wrapping tape of the present invention;

FIG. 7 is a schematic illustration of the attachment of the second folded tape and the installation of the fifth primary winding set of the present invention;

fig. 8 is a schematic illustration of the attachment of a fifth wrapping tape of the present invention.

Reference numerals illustrate:

1. a magnetic core; 2. a main beam; 3. side baffles; 4. a first protrusion; 5. a second protrusion; 6. a third protrusion; 7. a fourth protrusion; 8. a fifth protrusion; 9. a sixth protrusion; 10. a seventh protrusion; 11. an eighth protrusion; 12. a ninth projection; 13. a tenth protrusion; 14. an eleventh protrusion; 15. a twelfth protrusion; 16. a first folded adhesive tape; 17. a first primary winding group; 18. a first wrapping tape; 19. a second primary winding group; 20. a third secondary winding group; 21. a fourth order winding group; 22. a fourth wrapping tape; 23. a second folded adhesive tape; 24. a fifth primary winding group; 25. a fifth wrapping tape; 26. a first stitch; 27. a second stitch; 28. a fourth stitch; 29. a fifth stitch; 30. a sixth stitch; 31. a seventh stitch; 32. an eighth stitch; 33. a ninth stitch; 34. an eleventh stitch; 35. a twelfth stitch; 36. an air outlet hole; 37. supporting feet; 38. a sleeve.

Detailed Description

In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

The invention provides a power transformer passing VDE and CB tests, which is shown in figures 1-8, and comprises a magnetic core 1, wherein two sides of the magnetic core 1 are respectively provided with a framework structure, the framework structure comprises a main beam 2, the top of the main beam 2 is fixedly connected with side baffles 3, two ends of the magnetic core 1 are respectively and fixedly connected with two side baffles 3, one bottom of the main beam 2 is fixedly connected with a first bulge 4, a second bulge 5, a third bulge 6, a fourth bulge 7, a fifth bulge 8 and a sixth bulge 9, the bottom of the other bottom of the main beam 2 is fixedly connected with a seventh bulge 10, an eighth bulge 11, a ninth bulge 12, a tenth bulge 13, an eleventh bulge 14 and a twelfth bulge 15, one side of the two main beams 2 is adhered with a first turnover adhesive tape 16, the outer side of the magnetic core 1 is winded with a first primary winding group 17, the first primary winding group 17 is externally adhered with a first wrapping tape 18, the first wrapping tape 18 is externally wound with a second primary winding group 19, one ends of the two first folding tapes 16 are folded on the surface of the second primary winding group 19, the second primary winding group 19 is externally adhered with a second wrapping tape, the second wrapping tape is externally wound with a third secondary winding group 20, the third secondary winding group 20 is externally adhered with a third wrapping tape, the third wrapping tape is externally wound with a fourth secondary winding group 21, the fourth secondary winding group 21 is externally adhered with a fourth wrapping tape 22, two main beams 2 are externally wound with a second folding tape 23, the outer sides of the fourth wrapping tapes 22 are respectively provided with a fifth primary winding group 24, one ends of the two second folding tapes 23 are respectively folded on the surface of the fifth primary winding group 24, a fifth wrapping tape 25 is adhered to the outer side of the fifth primary winding group 24.

The first stitch 26 is fixedly connected to the bottom of the first bulge 4, the second stitch 27 is fixedly connected to the bottom of the second bulge 5, the fourth stitch 28 is fixedly connected to the bottom of the fourth bulge 7, the fifth stitch 29 is fixedly connected to the bottom of the fifth bulge 8, the sixth stitch 30 is fixedly connected to the bottom of the sixth bulge 9, the seventh stitch 31 is fixedly connected to the bottom of the seventh bulge 10, the eighth stitch 32 is fixedly connected to the bottom of the eighth bulge 11, the ninth stitch 33 is fixedly connected to the bottom of the ninth bulge 12, the eleventh stitch 34 is fixedly connected to the bottom of the eleventh bulge 14, and the twelfth stitch 35 is fixedly connected to the bottom of the twelfth bulge 15.

One end of the first primary winding group 17 is connected with the fourth pin 28, the other end of the first primary winding group 17 is connected with the ninth pin 33, one end of the second primary winding group 19 is clamped between the fifth protrusion 8 and the sixth protrusion 9, and the other end of the second primary winding group 19 is clamped between the seventh protrusion 10 and the eighth protrusion 11.

One end of the third secondary winding group 20 is clamped between the second protrusion 5 and the third protrusion 6, the other end of the third secondary winding group 20 is clamped between the tenth protrusion 13 and the eleventh protrusion 14, one end of the fourth secondary winding group 21 is clamped between the first protrusion 4 and the second protrusion 5, and the other end of the fourth secondary winding group 21 is clamped between the eleventh protrusion 14 and the twelfth protrusion 15.

The fifth primary winding 24 is connected at one end to a fifth pin 29 and the first primary winding 17 is connected at the other end to an eighth pin 32.

The surfaces of the two main beams 2 are provided with a plurality of air outlet holes 36, and the air outlet holes 36 are respectively corresponding to the first bulge 4, the second bulge 5, the third bulge 6, the fourth bulge 7, the fifth bulge 8, the sixth bulge 9, the seventh bulge 10, the eighth bulge 11, the ninth bulge 12, the tenth bulge 13, the eleventh bulge 14 and the twelfth bulge 15.

The bottoms of the first bulge 4, the sixth bulge 9, the seventh bulge 10 and the twelfth bulge 15 are fixedly connected with supporting feet 37, the cross section of each supporting foot 37 is a right triangle, two ends of the second primary winding group 19, the third secondary winding group 20 and the fourth secondary winding group 21 are fixedly sleeved with sleeves 38, and the sleeves 38 are made of rubber materials.

EE30 type soft magnetic ferrite material is selected as the magnetic core 1, and A3X2G5 material is used as the framework structure.

The working principle of the invention is as follows:

1. a magnetic core; 2. a main beam; 3. side baffles; 4. a first protrusion; 5. a second protrusion; 6. a third protrusion; 7. a fourth protrusion; 8. a fifth protrusion; 9. a sixth protrusion; 10. a seventh protrusion; 11. an eighth protrusion; 12. a ninth projection; 13. a tenth protrusion; 14. an eleventh protrusion; 15. a twelfth protrusion; 16. a first folded adhesive tape; 17. a first primary winding group; 18. a first wrapping tape; 19. a second primary winding group; 20. a third secondary winding group; 21. a fourth order winding group; 22. a fourth wrapping tape; 23. a second folded adhesive tape; 24. a fifth primary winding group; 25. a fifth wrapping tape; 26. a first stitch; 27. a second stitch; 28. a fourth stitch; 29. a fifth stitch; 30. a sixth stitch; 31. a seventh stitch; 32. an eighth stitch; 33. a ninth stitch; 34. an eleventh stitch; 35. a twelfth stitch; 36. an air outlet hole; 37. supporting feet; 38. casing pipe

Referring to fig. 1-8 of the specification, when the device is used, the device is firstly turned upside down, the bottom of the device is upwards raised, two pieces of first turnover adhesive tapes 16 with the thickness of about 17.5 mm by 25mm are cut, the first turnover adhesive tapes 16 are respectively stuck to the positions of the first bulge 4 to the fourth bulge 7 and the ninth bulge 12 to the twelfth bulge 15 along the edges of the two main beams 2, the side surfaces of the first turnover adhesive tapes 16 are turned over, the ninth stitch 33 starts, a layer of first primary winding group 17 is tightly wound on the outer side of the magnetic core 1 for forty-five circles, the tail end of the first primary winding group 17 is connected with the fourth stitch 28, the first primary winding group 17 is tightly wrapped by a first wrapping adhesive tape 18, the head is artificially caused between the eighth bulge 11 and the ninth bulge 12, a layer of second primary winding group 19 is uniformly scattered and wound on the outer side of the first wrapping adhesive tape 18 for 6 circles, the tail end of the second primary winding group 19 is clamped between the fifth bulge 8 and the sixth bulge 9, the first turnover adhesive tape 16 is turned over on the surface of the second primary winding group 19, the head end of the second primary winding group 19 is shifted again and clamped between the seventh bulge 10 and the eighth bulge 11, the second primary winding group 19 is tightly wrapped by the second wrapping adhesive tape, the head end between the tenth bulge 13 and the eleventh bulge 14 is started, a layer of third secondary winding group 20 is uniformly wound outside the second wrapping adhesive tape, the tail end of the third secondary winding group 20 is clamped between the second bulge 5 and the third bulge 6, the third secondary winding group 20 is tightly wrapped by the third wrapping adhesive tape, the head end between the eleventh bulge 14 and the twelfth bulge 15 is uniformly wound outside the third wrapping adhesive tape, a layer of fourth secondary winding group 21 is clamped between the first bulge 4 and the second bulge 5, the tail end of the fourth secondary winding group 21 is tightly wrapped by the fourth wrapping adhesive tape 22, the second turnover adhesive tapes 23 are respectively stuck along the edges of the two main beams 2, the side surfaces of the second turnover adhesive tapes 23 are turned over, a layer of fifth primary winding groups 24 are tightly wound on the outer side of the fourth wrapping adhesive tape 22 for thirty-six circles, the tail end of the fifth primary winding groups 24 are connected with the eighth stitch 32, the fifth wrapping adhesive tape 25 tightly wraps the fifth primary winding groups 24, thus completing the integral assembly of the device, and the three groups of primary safety distances of the third secondary winding group 20, the fourth secondary winding group 21, the second primary winding group 19 and the fifth primary winding group 24 meet the requirements;

referring to fig. 1-8 of the specification, when the device is used, by arranging the air outlet holes 36 at the positions of the pins, the pins can be reduced to shift when soldering tin is carried out on the product, and on the premise of ensuring the safe distance of VDE, the air outlet holes 36 are arranged, so that the qualification rate of the product can be effectively improved.

Claims

1. Power transformer through VDE, CB test, including magnetic core (1), its characterized in that: the utility model discloses a magnetic core, including main crossbeam (2), main crossbeam (2) top fixedly connected with side shield (3), magnetic core (1) both ends respectively with two side shield (3) fixed connection, one of them main crossbeam (2) bottom fixedly connected with first arch (4), second arch (5), third arch (6), fourth arch (7), fifth arch (8) and sixth arch (9), another main crossbeam (2) bottom fixedly connected with seventh arch (10), eighth arch (11), ninth arch (12), tenth arch (13), eleventh arch (14) and twelfth arch (15), two main crossbeam (2) one side all paste first turn-over adhesive tape (16), magnetic core (1) outside winding is provided with first elementary winding group (17), first elementary winding group (17) outside is pasted and is had first parcel adhesive tape (18), first elementary winding (18) outside is provided with second winding group (19) the second is rolled over winding tape (19) outside turns over winding group (19) first adhesive tape (16) the second is rolled over winding group outside first winding tape (19), the outer side of the second wrapping adhesive tape is wound with a third secondary winding group (20), the outer side of the third secondary winding group (20) is adhered with a third wrapping adhesive tape, the outer side of the third wrapping adhesive tape is wound with a fourth secondary winding group (21), the outer side of the fourth secondary winding group (21) is adhered with a fourth wrapping adhesive tape (22), one side of the main beam (2) is adhered with a second turnover adhesive tape (23), the outer side of the fourth wrapping adhesive tape (22) is wound with a fifth primary winding group (24), one end of each second turnover adhesive tape (23) is folded on the surface of the fifth primary winding group (24), and the outer side of each fifth primary winding group (24) is adhered with a fifth wrapping adhesive tape (25);

when the device is used, the device is firstly inverted, the bottom of the device is upwards provided with two first turnover adhesive tapes (16), the edges of the two main beams (2) are respectively stuck to the positions of the first bulge (4) to the fourth bulge (7) and the ninth bulge (12) to the twelfth bulge (15), the side surfaces of the first turnover adhesive tapes (16) are turned over, the ninth stitch (33) starts from the head, a layer of first primary winding group (17) is closely wound on the outer side of the magnetic core (1), the tail end of the first primary winding group (17) is connected with the fourth stitch (28), the first turnover adhesive tapes (18) are used for tightly wrapping the first primary winding group (17), the first turnover adhesive tapes (11) and the ninth bulge (12) are respectively used for evenly scattering the first turnover adhesive tapes (19) for 6 circles, the tail end of the second primary winding group (19) is clamped between the fifth bulge (8) and the sixth bulge (9), the first turnover adhesive tapes (19) are clamped between the second primary winding group (19) and the first turnover adhesive tapes (14) are tightly wrapped by the second turnover adhesive tapes (12), the first turnover adhesive tapes (19) and the first turnover adhesive tapes (19) are tightly wrapped between the first turnover adhesive tapes (14) and the first turnover adhesive tapes (12), uniformly winding a layer of third secondary winding group (20) on the outer side of the second wrapping adhesive tape, clamping the tail end of the third secondary winding group (20) between the second bulge (5) and the third bulge (6), tightly wrapping the third secondary winding group (20) by the third wrapping adhesive tape, starting from the position between the eleventh bulge (14) and the twelfth bulge (15), uniformly winding a layer of fourth secondary winding group (21) on the outer side of the third wrapping adhesive tape, clamping the tail end of the fourth secondary winding group (21) between the first bulge (4) and the second bulge (5), tightly wrapping the fourth secondary winding group (21) by a fourth wrapping adhesive tape (22), pasting second turnover adhesive tapes (23) along the edges of the two main beams (2), starting from the side of the fifth turnover adhesive tape (23), tightly winding a layer of fifth primary winding group (24) on the outer side of the fourth wrapping adhesive tape (22) for thirty sixteen circles, connecting the tail end of the fifth primary winding group (24) with a eighth stitch (32), and tightly wrapping the fifth primary winding group (24) by the fifth stitch (25), so as to complete the tight wrapping of the whole winding device.

2. A power transformer passing VDE, CB test according to claim 1, characterized in that: first stitch (26) of first protruding (4) bottom fixedly connected with, second stitch (27) of second protruding (5) bottom fixedly connected with, fourth stitch (28) of fourth protruding (7) bottom fixedly connected with, fifth stitch (29) of fifth protruding (8) bottom fixedly connected with, sixth stitch (30) of sixth protruding (9) bottom fixedly connected with, seventh stitch (31) of seventh protruding (10) bottom fixedly connected with, eighth stitch (32) of eighth protruding (11) bottom fixedly connected with, ninth stitch (33) of ninth protruding (12) bottom fixedly connected with, eleventh stitch (34) of eleventh protruding (14) bottom fixedly connected with, twelfth stitch (35) of twelfth protruding (15) bottom fixedly connected with.

3. A power transformer passing VDE, CB test according to claim 2, characterized in that: one end of the first primary winding group (17) is connected with a fourth pin (28), the other end of the first primary winding group (17) is connected with a ninth pin (33), one end of the second primary winding group (19) is clamped between the fifth bulge (8) and the sixth bulge (9), and the other end of the second primary winding group (19) is clamped between the seventh bulge (10) and the eighth bulge (11).

4. A power transformer passing VDE, CB test according to claim 2, characterized in that: one end of the third secondary winding group (20) is clamped between the second bulge (5) and the third bulge (6), the other end of the third secondary winding group (20) is clamped between the tenth bulge (13) and the eleventh bulge (14), one end of the fourth secondary winding group (21) is clamped between the first bulge (4) and the second bulge (5), and the other end of the fourth secondary winding group (21) is clamped between the eleventh bulge (14) and the twelfth bulge (15).

5. A power transformer passing VDE, CB test according to claim 2, characterized in that: one end of the fifth primary winding group (24) is connected with a fifth pin (29), and the other end of the first primary winding group (17) is connected with an eighth pin (32).

6. A power transformer passing VDE, CB test according to claim 1, characterized in that: two ventholes (36) have all been seted up on main beam (2) surface, venthole (36) quantity is established to a plurality ofly, a plurality of venthole (36) respectively with first protruding (4), second protruding (5), third protruding (6), fourth protruding (7), fifth protruding (8), sixth protruding (9), seventh protruding (10), eighth protruding (11), ninth protruding (12), tenth protruding (13), eleventh protruding (14) and twelfth protruding (15) are corresponding.

7. A power transformer passing VDE, CB test according to claim 1, characterized in that: the novel winding device is characterized in that supporting legs (37) are fixedly connected to the bottoms of the first bulge (4), the sixth bulge (9), the seventh bulge (10) and the twelfth bulge (15), the cross section of each supporting leg (37) is right triangle, and sleeves (38) are fixedly sleeved at two ends of the second primary winding group (19), the third secondary winding group (20) and the fourth secondary winding group (21), and the sleeves (38) are made of rubber materials.

8. A power transformer passing VDE, CB test according to claim 1, characterized in that: the magnetic core (1) is made of EE30 type soft magnetic ferrite material, and the framework structure is made of A3X2G5 material.