TWI443693B - Transformer having combined bobbins - Google Patents

Description

Transformer with combined winding frame

The invention relates to a transformer, in particular to a transformer with a combined winding frame.

Press, the transformer is an electronic component that uses the magnetic core to generate electromagnetic coupling inductance with the primary side winding and the secondary side winding, thereby achieving the conversion voltage. The conventional voltage device mainly comprises a winding frame and two iron cores. The winding frame has a hollow cylindrical shape and has an axial passage, and the two ends of the winding frame extend out of the plurality of pins. The two sets of wires are respectively wound on the two ends of the bobbin and the adjacent pins with different turns to form the primary side winding and the secondary side winding respectively, and then the two cores are respectively installed at the two ends of the bobbin.

However, since the inside of the winding frame of the conventional transformer is an axial passage, the current flowing through the wire or the induced current generates heat accumulation inside the winding frame (ie, in the axial passage). The heat accumulation problem is particularly serious in high-power transformers (eg 600W). Since the conventional transformer itself does not have any heat dissipation mechanism, after a certain period of operation, the internal heat accumulation of the bobbin causes an increase in temperature, which affects the operation of the transformer. That is, an external fan is used to dissipate heat, but since the two ends of the bobbin are blocked by the magnetic core, the external fan can only blow the outer surface of the bobbin, and cannot dissipate the heat accumulated therein, which also causes an increase in temperature. The problem.

In addition to the heat dissipation problem, the conventional transformer's bobbin is integrally formed, so When manufacturing transformers of different sizes, it is necessary to manufacture different winding frames and the entire casing, which is disadvantageous for mold design and reduction of manufacturing cost. Therefore, the industry has introduced transformers with combined bobbins, in which a plurality of bobbins are arranged, which are arranged or attached together to form a complete winding assembly, but such conventional windings are combined. The transformer of the rack also does not solve the above problem of internal heat dissipation of the bobbin.

Therefore, how to solve the above problems has become an improvement target of the present inventors.

It is an object of the present invention to provide a transformer with a combined bobbin that can provide a better heat dissipation effect for the bobbin and that can be flexibly matched to reduce manufacturing costs.

In order to achieve the above object, the present invention provides a transformer having a combined bobbin, comprising: a plurality of bobbins, each of which has an annular groove disposed at an outer edge, a hollow portion, and molding a plurality of bumps on the surface and surrounding the hollow portion, the bumps causing adjacent two winding frames to form a gap between each other when the winding frame is disposed; the plurality of secondary winding groups are disposed on the windings Between the racks, each of the secondary winding sets has a perforation corresponding to the hollow portion; and the two cores, the hollow portions respectively penetrating the bobbins, and the secondary winding groups Pierce and combine.

Another object of the present invention is to provide a transformer module that can provide an excellent heat dissipation effect between a transformer and a bobbin, and can be flexibly matched to reduce manufacturing costs. .

In order to achieve the above object, the present invention provides a transformer module, including: a transformer; a temperature sensor disposed in the transformer to monitor the temperature of the transformer; and a heat dissipation fan disposed outside the transformer The transformer further comprises: a base, which is provided with a through hole; a plurality of winding frames are disposed in the base, each of the winding frames has an annular trunking disposed on the outer edge, a hollow portion corresponding to the through hole, and a plurality of bumps formed on the surface and surrounding the hollow portion, the bumps causing adjacent two winding frames to form a gap between each other when configured; a winding group disposed between the winding frames, each of the secondary winding groups having a perforation corresponding to the hollow portion; and two magnetic cores respectively penetrating the through holes of the base and the windings The hollow portions of the frame and the perforations of the secondary winding groups are combined.

Compared with the prior art, the present invention has the following effects:

Since the transformer of the present invention has a plurality of bobbins, and a plurality of bumps are formed on one surface of each bobbin, the bumps can cause a gap between the adjacent two bobbins in the configuration. This gap contributes to air convection to dissipate the heat generated by the wire windings on the bobbin to the outside of the transformer. Even if the secondary winding group spacing is disposed between adjacent two winding frames, because the convex points can make adjacent winding frames and two The secondary winding groups create a gap between each other, so the heat accumulation between the adjacent winding frame and the secondary winding group can still be blocked, and the air can flow through the convex points in the adjacent winding frame and the secondary winding. The gap generated between the wire groups can reduce the heat accumulation and provide a good heat dissipation effect on the winding frame and the secondary winding group.

The transformer module of the invention further comprises a cooling fan to enhance the air convection effect, so that the entire transformer can provide excellent heat dissipation effect.

On the other hand, since the transformer of the present invention has a plurality of winding frames and a plurality of secondary winding groups, the manufacturer can manufacture different sizes of bases for customers, and different numbers of winding frames and secondary winding groups. It can be flexibly matched in size by being placed in the base. As a result, manufacturers do not need to design coil bobbins and secondary winding sets of different lengths, which can greatly reduce manufacturing costs.

1‧‧‧Transformer

2‧‧‧Transformer module

10‧‧‧Base

11‧‧‧floor

111‧‧‧through holes

112‧‧‧First pin

113‧‧‧second pin

12‧‧‧ side panels

122‧‧‧First channel

123‧‧‧Second channel

13‧‧‧Insulation sheet

20‧‧‧ Winding frame

21‧‧‧Circular trough

22‧‧‧ Hollow

23, 23'‧‧‧ splint

24‧‧ ‧ gap

25‧‧‧Bumps

30‧‧‧Second winding group

31‧‧‧Perforation

32‧‧‧Fold

40‧‧‧Magnetic core

41‧‧‧Main base plate

42‧‧‧Flanking board

43‧‧‧Magnetic axis

50‧‧‧temperature sensor

60‧‧‧ cooling fan

200‧‧‧ wire

The first figure is an exploded perspective view of the transformer of the present invention.

The second figure is a combined perspective view of the transformer of the present invention.

The third figure is a combined perspective view of the transformer of the present invention from another angle.

The fourth figure is a combined perspective view of the transformer of the present invention in which the wires have been wound around a hot wire frame to form a winding.

Figure 5 is a combined perspective view of the transformer of the present invention from another perspective in which the wires have been wound around a hot wire frame to form a winding.

Figure 6 is a front elevational view of the transformer of the present invention in which the wires have been wound around a hot wire frame to form a winding.

The seventh drawing is an exploded perspective view of the transformer module of the present invention.

The detailed description and technical content of the present invention will be described with reference to the accompanying drawings.

Referring to the first to sixth figures, the present invention provides a transformer 1 with a combined reel (hereinafter referred to as "transformer 1"), which includes: a base 10, a plurality of bobbins 20, and a plurality of The secondary winding group 30 and the two cores 40.

The base 10 includes a bottom plate 11 and two side plates 12 extending perpendicularly to the two sides of the bottom plate 11. The bottom plate 11 is provided with a through hole 111 and a plurality of first pins 112 and a plurality of second pins 113. In addition, the bottom plate 11 of the base 10 is respectively provided with a first channel 122 (third diagram) and a second channel 123 (second diagram) on two side edges different from the two side plates 12, and the first channel 122 is used. For the temperature sensor 50 (the seventh figure), the second channel 123 is used for the wire of the temperature detector 50 to be connected, thereby fixing the wire to the base 10 to avoid floating. The first pin 112 is used for electrically connecting the primary side winding (in the present invention, the bobbin 20), and the second pin 113 is used for the wire of the temperature sensor 50 as a connecting line. Electrically connected to a circuit board (not shown).

In the transformer 1 of the present invention, the positions and numbers of the first pin 112 and the second pin 113 can be adjusted according to actual needs, and the positions and quantities of the first channel 122 and the second channel 123 can also be determined according to actual needs. The figure is only an embodiment, and is not intended to limit the invention, as long as the first pin 112 and the second 113 are disposed on the base 10 instead of being disposed on the bobbin 20.

The plurality of bobbins 20 are disposed in the base 10, each of the bobbins 20 is substantially annular and has an annular trunking 21 disposed on the outer edge and a hollow portion 22 corresponding to the through hole 111 of the base 10; Specifically, the side of each bobbin 20 is substantially H-shaped and has The two clamping plates 23 and 23', the hollow portion 22 is a circular through hole, so that the annular wire groove 21 is surrounded between the two clamping plates 23, 23' and the circular outer wall of the hollow portion 22, and the wire 200 can be wound around This annular groove 21 is inside. One end of each bobbin 20 is respectively provided with a notch 24 on the two clamping plates 23, 23'. The wire 200 is inserted into a notch 24 and wound around the annular groove 21 and pierced through the other notch 24 to form other portions. Electrical connection.

Each of the bobbins 20 is formed with a plurality of bumps 25 on at least one surface thereof (ie, the splint 23). The bumps 25 are spaced apart around the hollow portion 22 and are preferably evenly distributed. The point 25 protrudes from the clamping plate 23 for a distance, so that the adjacent two bobbins 20 can be configured to create a gap between them for dissipating heat for air convection. The bobbin 20 may be made of a non-conductive material such as plastic, or may be made of a conductive material such as metal. An insulating sheet 13 can be attached to the two sides of the base 10, such as the Mylar tape commonly used in the industry.

The plurality of secondary winding groups 30 are disposed between adjacent two winding frames 20, and each secondary winding group 30 is substantially formed of a C-shaped conductive sheet having a hollow portion corresponding to the winding frame 20. A perforation 31 of 22. One end of the secondary winding group 30 is bent and formed with two flaps 32 for bending and fixing on the bottom plate 11 of the base 10 for positioning. As is clear from the second figure, the flaps 32 of each secondary winding set 30 can be designed to be of different lengths so as to be staggered and placed on one side of the base 10.

It should be particularly noted that, as can be seen from the first figure, when the bobbin 20 is disposed in the base 10 and the secondary winding group 30 is respectively inserted between the adjacent two bobbins 20, each bobbin The bumps 25 of 20 are all formed on the same side, in the first figure, on the surface of the downwardly facing clamping plate 23, so that the bumps 25 of the bobbin 20 can abut against the secondary winding set 30. A gap is formed between the bobbin 20 and the secondary winding group 30. The bump 25 of the lowermost bobbin 20 does not abut the secondary winding group 30, but still abuts the bottom plate 11, so can A gap is created between the bobbin 20 and the bottom plate 11, which facilitates heat dissipation by air convection.

In the present invention, the bobbin 20 is used as a primary side winding group, and the secondary winding group 30 is used as a secondary side winding. Although in the first figure, the bobbin 20 and the secondary winding group 30 are alternately arranged, it is conceivable that the bobbins 20 may be disposed adjacent to each other as long as the wires are connected correctly, and the two The secondary bobbins 30 may also be disposed adjacent to each other and do not necessarily need to be staggered with each other. Therefore, the present invention utilizes a combined design of a plurality of bobbins 20 and a secondary winding set 30, and the first pin 112 and the second pin 113 are not disposed on the bobbin 20, so that the size and variation can be The design of the pressure conversion ratio is quite elastic and variable, and it is not necessary to design coil bobbins of different sizes as in the prior art, and it is necessary to particularly wind the windings of different turns, which can greatly reduce the manufacturing cost and improve the production. effectiveness.

Each of the cores 40 is substantially E-shaped and made of a magnetic material (generally an iron core), and may also be an ATQ type, an EE type, an ER type, an ERI type, an ECI type, an RM type, an EQ type, a PQ type, A magnetic core structure of a PJ type or a PM type has a main bottom plate 41 and two side flaps 42 extending perpendicularly to two sides of the main bottom plate 41. The main bottom plate 41 is formed with a magnetic shaft 43 having an outer diameter of the magnetic shaft 43. Slightly smaller than the inner diameter of the through hole 111, the hollow portion 22, and the through hole 31, the two cores 40 can respectively penetrate the through hole 111 of the base 10 from the upper and lower sides of the first figure, the hollow portion 22 of the bobbin 20, and The perforations 31 of the secondary winding groups 30 are combined.

It should be particularly noted that the two side flaps 42 of each core 40 are wrapped on the two side panels 12 of the base 10, such that in the direction parallel to the two side panels 12 of the base 10 and the two side flaps 42 of the core 40 Without being blocked by other plates, as shown in the sixth figure, air convection can pass through the bobbin 20 in a direction parallel to the two side plates 12 of the base 10. The gap between the secondary winding group 30 and the secondary winding group 30 is generated by the bumps 25, whereby the heat generated by the wire windings of the winding frame 20 is smoothly dissipated to the outside of the transformer 1.

In addition, although the first embodiment shows that the bobbin 20 and the secondary winding group 30 are vertically stacked to form a "vertical" transformer 1, it is conceivable that the bobbin 20 and the secondary winding are The group 30 is arranged horizontally and horizontally to form a "horizontal type" transformer 1, and the first pin 112 and the second pin 113 are correspondingly bent downward.

Referring to the seventh figure, the present invention further provides a transformer module 2 having the transformer 1, a temperature sensor 50, and a heat dissipation fan 60. The temperature sensor 50 is disposed in the first channel 122 of the transformer 1 to monitor the temperature of the transformer 1. The heat dissipation fan 60 is disposed outside the transformer 1 to dissipate heat from the transformer 1. More specifically, the cooling fan 60 can be disposed on one side of the transformer 1 and parallel to the two side plates of the base 10, so that the airflow blown by the cooling fan 60 can smoothly pass through the bobbin 20 and the secondary winding group. The gap between the 30 is caused by the bumps 25, whereby the heat generated by the wire windings of the bobbin 20 is smoothly dissipated to the outside of the transformer 1, and an excellent heat dissipation effect is produced.

In summary, it is known that the present invention has industrial applicability, novelty and advancement, and the structure of the present invention has not been seen in similar products and public use, and fully complies with the requirements of the invention patent application, and is filed according to the patent law.

1‧‧‧Transformer

10‧‧‧Base

11‧‧‧floor

111‧‧‧through holes

112‧‧‧First pin

113‧‧‧second pin

12‧‧‧ side panels

123‧‧‧Second channel

13‧‧‧Insulation sheet

20‧‧‧ Winding frame

21‧‧‧Circular trough

22‧‧‧ Hollow

23, 23'‧‧‧ splint

24‧‧ ‧ gap

25‧‧‧Bumps

30‧‧‧Second winding group

31‧‧‧Perforation

32‧‧‧Fold

40‧‧‧Magnetic core

41‧‧‧Main base plate

42‧‧‧Flanking board

43‧‧‧Magnetic axis

Claims (9)

A transformer with a combined winding frame, comprising: a plurality of winding frames, each of the winding frames having an annular groove disposed at an outer edge, a hollow portion, and a plurality of shapes formed on the surface and surrounding the hollow portion a bump, the bumps causing adjacent two winding frames to form a gap between each other when configured; a plurality of secondary winding groups are disposed between the winding frames, each of the secondary windings The wire set has a perforation corresponding to the hollow portion; the two cores are respectively connected to the hollow portions of the winding frames, and the perforations of the secondary winding groups are combined; and a base, the base a through hole is provided, and each of the hollow portions of the winding frame is corresponding to the through hole for respectively connecting each of the cores; wherein each of the winding frames has two clamping plates, and the hollow portion is a through hole a hole, the annular groove is disposed between the two clamping plates and the outer wall of the hollow portion, and the convex points are formed on at least one of the clamping plates. The transformer of the combined reel according to claim 1, wherein the bumps are evenly distributed on at least one of the splints. The transformer of the combined reel according to claim 2, wherein when the bobbins are disposed in the base and the secondary winding groups are respectively inserted between two adjacent reels, each A bump of the bobbin is formed on the same side. The transformer of the combined reel according to claim 2, wherein one end of each of the bobbins is respectively provided with a notch on the two plywood, and the wire penetrates into the notch and is wound on the annular trough and Pass through the other gap. The transformer of the combined reel according to claim 2, wherein each of the secondary winding groups is a C-shaped conductive sheet, and one end of the winding is formed with a bi-fold. The transformer of the combined reel according to claim 4, wherein the base comprises a bottom plate and two side plates extending perpendicularly on two sides of the bottom plate, wherein the bottom plate is provided with the through hole and the plurality of first pins. And a plurality of second pins, and an insulating sheet is attached to each of the two sides of the base. The transformer of the combined reel according to claim 6, wherein the bottom plate is respectively provided with at least one first channel and at least one second channel on two side edges different from the two side plates. The transformer of the combined reel according to claim 7, wherein each of the cores is E-shaped and made of a magnetic material, and has a main bottom plate and two side flaps extending perpendicularly on two sides of the main bottom plate. The two side flaps respectively cover the two side plates of the base, and the main bottom plate is formed with a magnetic shaft, and the outer diameter of the magnetic shaft is smaller than the inner diameter of the through hole, the hollow portion and the through hole. The transformer of the combined winding frame according to claim 8, wherein each of the magnetic core systems is ATQ type, EE type, ER type, ERI type, ECI type, RM type, EQ type, PQ type, PJ type, Or PM type core structure.