CN201156465Y - Transformer device - Google Patents

Abstract

A transformer comprises a first winding frame surrounding an axis and defining a first iron core hole, a second winding frame surrounding the axis and defining a second iron core hole, two iron cores respectively combined with the first iron core hole and the second iron core hole from two ends of the first iron core hole, and a winding unit. The first iron core hole is provided with a second winding frame mounting part and an iron core mounting part. The second bobbin is disposed in the second bobbin mounting portion. The iron cores respectively comprise a first shaft section extending corresponding to the iron core mounting part, a second shaft section extending corresponding to the second iron core hole, and an outer side section extending along the axis outside the first winding frame and connected with the first shaft section and the second shaft section. The winding unit comprises a first winding module and a second winding module which are respectively wound on the first winding frame and the second winding frame.

Description

transformer

technical field

The utility model relates to a transformer, in particular to a transformer adopting the structure of two bobbins nested with each other.

Background technique

The transformer in the discharge tube circuit is the main component that drives the discharge tube to light up. When a transformer needs to drive multiple discharge tubes in the discharge tube circuit, whether the current provided by the transformer to each discharge tube is average will determine the An important factor for the uniformity of the brightness of the discharge tube.

For example, the first type of transformer shown in Taiwan Patent Application No. 91205788 and No. 91214437 is composed of two bobbins nested in each other. The advantages of the transformer are that the coupling effect is good and the leakage magnetic flux is small. Therefore, the power conversion efficiency is high. However, since the iron core is affected by many variables during sintering and manufacturing, there will be errors in the characteristics of the two left and right interconnected iron cores, so the secondary coil currents output from the left and right sides will be uneven, so It will cause the disadvantage that the brightness of each discharge tube is inconsistent, and when it is applied to lighting, because the leakage magnetic flux is quite small, it will be much more difficult to realize the resonance lighting method using the leakage magnetic flux.

In addition, the second type of transformers shown in Taiwan Patent Application No. 92120718, No. 95216631, and No. 95210070 all use two or more winding frames arranged side by side, and cooperate with each other between the winding frames. Consisting of branch iron cores available for leakage magnetic flux, the advantage of the transformer is that it increases the leakage magnetic flux, which is beneficial to the resonance lighting method and improves the average problem of the output current. Compared with the shortcomings of the first transformer mentioned above, it is made However, based on too much leakage flux, the coupling effect is also significantly lower than that of the first type of transformer, so the power conversion efficiency is low, and the leakage flux is also likely to affect the characteristics of the surrounding parts. Under the requirements of safety regulations, The spacing between parts will increase, so the area of the circuit layout will increase accordingly.

Other third transformers such as China Taiwan Patent Application No. 93121426, No. 94109670, and No. 94134730 all form magnetic flux leakage by core branches or magnetic conductive components located outside the bobbin, and are not The above-mentioned first transformer structure is adopted, but a single bobbin with primary and secondary coils or a structure with multiple bobbins arranged side by side, so it also has the shortcomings of the aforementioned second transformer and needs to be improved.

Utility model content

The purpose of the utility model is to provide a transformer with good coupling effect and proper magnetic flux leakage function.

The transformer includes a first winding frame, a second winding frame, a core unit, and a winding unit, the first winding frame surrounds an axis and defines a first core hole, the second winding The wire frame surrounds the axis and defines a second core hole.

The utility model is characterized in that: the first core hole of the first winding frame has a second winding frame mounting part and a core mounting part respectively extending along the axis, and the second winding frame is arranged on the second winding frame In the installation part of the second winding frame.

The iron core unit includes two iron cores, the iron cores are respectively combined with the first and second iron core holes from both ends of the first iron core hole, and each of the iron cores has a first shaft section extending corresponding to the iron core mounting portion , a second shaft section extending corresponding to the second iron core hole, and an outer section extending outside the first winding frame along the axis and connected with the first and second shaft sections.

The winding unit includes a first winding module wound on the first winding frame, and a second winding module wound on the second winding frame.

The beneficial effect of the utility model is that: through the structural design of setting the second winding frame inside the first winding frame, the first and second winding modules can produce a good coupling effect, so as to reduce the large Magnetic flux leakage, and combined with the branch structure design of the first shaft section where the iron core is interposed between the first and second bobbins, an appropriate amount of magnetic flux leakage can be output externally through the first shaft section, Therefore, it can also achieve the use effect that is suitable for the resonance lighting method and has a good current equalization effect.

Description of drawings

Fig. 1 is a three-dimensional exploded view illustrating the first preferred embodiment of the utility model transformer;

Fig. 2 is a three-dimensional assembly diagram, illustrating the assembly structure of the above-mentioned first preferred embodiment;

Fig. 3 is a sectional view along the line III-III of Fig. 2, illustrating that in the above-mentioned first preferred embodiment, a first shaft section, a second shaft section, an outer section of an iron core and a first bobbin, a corresponding relationship of the second bobbin;

Fig. 4 is a cross-sectional view along the line IV-IV of Fig. 2, illustrating the air gap formed by a distance between the ends of the first shaft section in the above-mentioned first preferred embodiment;

Fig. 5 is a three-dimensional exploded view illustrating the second preferred embodiment of the transformer of the present invention;

Fig. 6 is a combined sectional view illustrating the combined structure of the above-mentioned second preferred embodiment;

Fig. 7 is a three-dimensional exploded view illustrating the third preferred embodiment of the transformer of the present invention;

Fig. 8 is a combined side view illustrating the combined structure of the above-mentioned third preferred embodiment;

Fig. 9 is a three-dimensional exploded view illustrating the fourth preferred embodiment of the transformer of the present invention; and

Fig. 10 is a combined sectional view illustrating the combined structure of the above-mentioned fourth preferred embodiment.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in detail:

Before the present utility model is described in detail, it should be noted that in the following description, similar components are denoted by the same numerals.

As shown in Figures 1 and 2, the first preferred embodiment of the utility model transformer 200 includes a first winding frame 20, a second winding frame 30, a core unit 400, a winding unit 50, and a shell Body 60.

The first bobbin 20 surrounds an axis X and defines a first core hole 21, and also includes a vent hole 22 connected to the first core hole 21 from its outer surface. In this embodiment, the The first bobbin frame 20 adopts the structure of a plurality of separation grooves 23 , and a single groove structure can also be used in actual manufacture.

The first core hole 21 has a second bobbin mounting portion 211 and a core mounting portion 212 respectively extending along the axis X. In this embodiment, the first bobbin frame 20 also includes a The partition wall 24 between the bobbin mounting portion 211 and the iron core mounting portion 212 can also be changed into bumps protruding from above and below the inner side of the first core hole 21 during actual manufacturing.

The ventilation hole 22 surrounds the axis X and is located in the middle of the first winding frame 20, so as to surround the first and second winding frames 20, 30 to make air convection, thereby improving the heat dissipation effect. The ventilation hole 22 is actually manufactured. Sometimes it can also be designed so that a plurality of holes are distributed on the first bobbin 20 .

The second winding frame 30 surrounds the axis X and defines a second core hole 31 , and the second winding frame 30 is disposed in the second winding frame installation portion 211 .

As shown in Figures 1, 2, 3, and 4, the iron core unit 400 includes two iron cores 40, and the iron cores 40 are respectively connected to the first and second iron core holes 21, 31 from both ends of the first iron core hole 21. , in this embodiment, the cores 40 are all E-shaped cores, and each has a first shaft segment 41 extending corresponding to the core mounting portion 212, a second shaft segment extending corresponding to the second core hole 31 A shaft segment 42 , and an outer segment 43 extending outside the first bobbin frame 20 along the axis X and connected to the first and second shaft segments 41 , 42 .

There is a distance d between the first shaft sections 41 to form an air gap, and other materials can also be added to the distance d to form different magnetic flux coefficients. In this embodiment, the first shaft section 41 extends Into the core mounting portion 212 , the distance d is between the ends of the first shaft section 41 .

The second shaft segments 42 abut against each other in the second core hole 31 .

The outer section 43 abuts against each other outside the first winding frame 20, the second shaft section 42 is connected with the outer section 43 to form a magnetic path, and the first shaft section 41 is a branch of the magnetic path The leakage magnetic flux is generated at the distance d, and the cross-sectional area of the first shaft section 41 is smaller than the effective cross-sectional area of the magnetic path in this embodiment.

The winding unit 50 includes a first winding module 51 wound on the first winding frame 20, and a second winding module 52 wound on the second winding frame 30, the first winding The module 51 has two secondary coils 511 that can provide electrical energy output. The secondary coils 511 are respectively wound on both sides of the air hole 22. In this embodiment, the first and second winding modules 51, 52 Form a transformer structure with one pair of input and two outputs, which can also be changed to a transformer structure with one pair of input or one pair of output during actual manufacture, and the winding direction of the secondary coil 511 is opposite in phase, so that both The generated magnetic flux is offset to reduce standing wave interference, and the distance d between the first shaft segments 41 can also be changed to be close to one of the secondary coils 511 by molding or grinding during manufacture to improve current sharing Effect.

The housing 60 is combined with the first bobbin 20, and includes a plurality of hollow parts 61 corresponding to the first core hole 21, the second core hole 31, and the vent hole 22, and the housing 60 can be strengthened. The second winding frame 30 is fixed in the first winding frame 20 and provides external protection for the transformer 200 .

Thereby, through the structural design of setting the second winding frame 30 inside the first winding frame 20, the first and second winding modules 51, 52 can produce a good coupling effect, avoiding the conventional The disadvantage of the large magnetic flux leakage generated by the side-by-side winding frames, and the branch structure design of the first shaft section 41 where the iron core 40 is interposed between the first and second winding frames 20, 30, and An air gap can be formed by the distance d between the first shaft sections 41, and an appropriate magnetic flux leakage can be output to the outside, so as to avoid the shortcomings of insufficient magnetic flux leakage when the two bobbins are combined inside and outside in the past. Therefore, The transformer 200 of the utility model can achieve good coupling effect and provide a proper amount of magnetic flux leakage, so it can be applied to the resonant lighting method and has good current equalization effect.

As shown in Figures 5 and 6, the second preferred embodiment of the utility model transformer 200 will be further described below. The second preferred embodiment is roughly the same as the first preferred embodiment above. A shaft section 41 is located between the second shaft section 42 and the outer section 43. The difference of this second preferred embodiment is that the second shaft section 42 of the core 40 is located between the first shaft section 41 and the outer section 43. Between the outer sections 43, since the first shaft section 41 still extends in the core mounting portion 212, the second shaft section 42 still abuts against each other in the second core hole 31, and the outer section 43 still abut against each other on the outside of the first winding frame 20, so it also has the same use effect as that of the first preferred embodiment.

As shown in Figures 7 and 8, the third preferred embodiment of the utility model transformer 200 will be further described below. The third preferred embodiment is substantially the same as the first preferred embodiment above, except that the core unit 400 includes One I-shaped iron core 70 and two U-shaped iron cores 80 , the I-shaped iron core 70 is passed through the iron core installation part 212 , each of the U-shaped iron cores 80 has a second shaft section passed through the second iron core hole 31 82. An outer segment 83 extending outside the first bobbin 20 along the axis X, and a connecting segment 84 connecting the second shaft segment 82 and the outer segment 83, the second shaft segment 82 and the outer segment 83 The ends of the outer section 83 are in contact with each other, and the two ends of the I-shaped iron core 70 correspond to the upper surface of the connecting section 84, and the corresponding positions form a distance d spaced from top to bottom. In actual manufacturing, the I-shaped core 70 The two ends of the iron core 70 can also correspond to the lower surface of the connecting section 84 to form the distance d, through which a small air gap can be formed, and the small air gap can achieve the effect of externally outputting appropriate magnetic flux leakage .

As shown in Figures 9 and 10, the fourth preferred embodiment of the utility model transformer 200 will be further described below. The fourth preferred embodiment is roughly the same as the first preferred embodiment above, except that the core unit 400 includes An I-shaped iron core 70 and two U-shaped iron cores 80 similar to U-shaped, the I-shaped iron core 70 is installed in the iron core mounting part 212, each of the U-shaped iron cores 80 has a second iron core hole 31 The second shaft segment 82, an outer segment 83 extending outside the first winding frame 20 along the axis X, and a connecting segment 84 connecting the second shaft segment 82 and the outer segment 83, the first The two shaft sections 82 and the outer section 83 abut against each other, and the connecting section 84 extends toward the two ends of the I-shaped iron core 70 correspondingly, and a distance d is formed at the corresponding position, and a tiny gas can be formed by the distance d. Gap, and the small air gap can achieve the effect of external output of appropriate magnetic flux leakage.

Claims (10)

1. transformer, comprise one first drum stand, second drum stand, a core unit, and a coiling unit, this first drum stand is round an axis and define one first hole unshakable in one's determination, this second drum stand is round this axis and define one second hole unshakable in one's determination, it is characterized in that:

First hole unshakable in one's determination of this first drum stand has one second a drum stand installation portion and an installation portion unshakable in one's determination that extends along this axis respectively, and this second drum stand is arranged in this second drum stand installation portion;

This core unit comprises two iron cores, described iron core is incorporated into this first, second hole unshakable in one's determination respectively from the two ends in this first hole unshakable in one's determination, described iron core respectively has second shaft part that first shaft part that extends corresponding to this iron core installation portion, extends corresponding to this second hole unshakable in one's determination, and a segmentum laterale that extends and link to each other with this first, second shaft part in this first drum stand outside along this axis; And

This coiling unit comprise one be set around this first drum stand first the coiling module, and one be set around this second drum stand second the coiling module.

2. transformer as claimed in claim 1 is characterized in that: this first drum stand comprises that also one is communicated to the air-vent in this first hole unshakable in one's determination by its outer surface.

3. transformer as claimed in claim 2 is characterized in that: this air-vent is positioned in the middle of this first drum stand, and this first coiling module has two secondary coils, and described secondary coil is positioned at the both sides of this air-vent.

4. transformer as claimed in claim 2 is characterized in that: this first drum stand also comprises a partition wall between this second drum stand installation portion and this iron core installation portion.

5. transformer as claimed in claim 2 is characterized in that: this transformer also comprises a housing, and this housing is incorporated on this first drum stand, and comprises a plurality of hollow-out parts corresponding to this first hole unshakable in one's determination, this second hole unshakable in one's determination, this air-vent.

6. transformer as claimed in claim 1, it is characterized in that: have a spacing between first shaft part of described iron core, described second shaft part is mutual butt in this second hole unshakable in one's determination, described segmentum laterale is at this mutual butt in first drum stand outside, and described second shaft part and described segmentum laterale form a flux path.

7. transformer as claimed in claim 6 is characterized in that: described first shaft part extends in this iron core installation portion, and this spacing is between the end of described first shaft part.

8. transformer as claimed in claim 1 is characterized in that: second shaft part and the described segmentum laterale of described iron core are connected to form a flux path, and the sectional area of described first shaft part is not more than the net sectional area of this flux path.

9. transformer as claimed in claim 1, it is characterized in that: this core unit comprises an I sections heart and two U sections hearts, this I sections heart is arranged in this iron core installation portion, the described U sections heart respectively has second shaft part that is arranged in this second hole unshakable in one's determination, one along the segmentum laterale of this axis in this first drum stand outside extension, reach the connected section of this second shaft part of connection and this segmentum laterale, described second shaft part and the mutual butt of described segmentum laterale, one of them of the two ends of this I sections heart and the upper surface of described connected section and lower surface is corresponding, and corresponding position forms a spacing.

10. transformer as claimed in claim 1, it is characterized in that: this core unit comprises an I sections heart and two U sections hearts, this I sections heart is to be arranged in this iron core installation portion, the described U sections heart respectively has one and is arranged in second shaft part, in this second hole unshakable in one's determination along the segmentum laterale of this axis in this first drum stand outside extension, reach the connected section of this second shaft part of connection and this segmentum laterale, described second shaft part and the mutual butt of described segmentum laterale, this connected section extends corresponding towards the side, two ends of this I sections heart, and corresponding position forms a spacing.

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