CN101241798A - Leakage inductance adjustable transformer - Google Patents

Abstract

A leakage inductance type transformer with adjustable process comprises a bobbin unit, a primary coil, a secondary coil and an iron core unit. The primary coil and the secondary coil are both arranged on the bobbin winder bracket unit. The iron core unit is assembled on the winding frame unit and comprises a first iron core, a second iron core, a primary magnetic flux area which is formed between the first iron core and the second iron core and is close to the primary coil, and a secondary magnetic flux area which is formed between the first iron core and the second iron core and is close to the secondary coil, a space allowing the first iron core and the second iron core to move relatively is reserved around the iron core unit of the winding frame unit, the effective magnetic flux area of the primary magnetic flux area is not equal to that of the secondary magnetic flux area, and the secondary magnetic flux area is allowed to change under the relative movement of the first iron core and the second iron core.

Description

Process adjustable leakage inductance transformer

technical field

The invention relates to a transformer, in particular to a process-adjustable leakage inductance transformer which allows the iron cores of a core group to move relatively during manufacture.

Background technique

As shown in Figure 1, it is a transformer 100 structure commonly used in a backlight module, the transformer 100 includes a core unit 11, a winding frame unit 12 combined with the core unit 11, a winding frame unit 12 arranged on the winding frame unit 12 The primary coil 13 and a secondary coil 14 arranged on the bobbin unit 12, each backlight module includes a plurality of transformers 100 to light a plurality of lamp tubes, in order to make the brightness of each lamp tube consistent, each The secondary coil 14 connected between a transformer 100 and the lamp tube should have the same inductance value as possible, so as to achieve the goal of average current and uniform brightness of the lamp tube.

However, the iron core unit 11 often produces a large error during actual manufacturing, because the iron core unit 11 is a non-air gap magnetic core, and there are many variables during sintering and manufacturing. Therefore, when a transformer 100 is manufactured, after testing It can be found that the error range of the inductance value is as high as 40%, and the error range of the leakage inductance value is as high as 10%, which is far from the 1% error range required by the shipment. It consumes a lot of subsequent processing time, so that many products are directly discarded during the screening process, resulting in extremely low yields and a substantial increase in overall costs.

In addition, because the general core unit 11 is composed of more than two core components 111, as shown in Figure 1, the core components 111 are I-shaped and O-shaped respectively. It is necessary to adjust the position of the iron core, which will cause an air gap in the position of the middle primary coil, resulting in a large amount of leakage magnetic flux, which will greatly affect the power output, so it is not suitable to use the air gap method for adjustment work. The design of the iron core unit 11 cannot achieve the effect of adjusting and changing the secondary magnetic flux while keeping the primary magnetic flux stable.

Contents of the invention

The purpose of the present invention is to provide a structural design that can adjust the leakage inductance value during manufacturing, so that the error range of the leakage inductance of each transformer can be adjusted to reach the shipping standard, and then the process yield can be greatly improved. Leakage-inductance transformers.

The process adjustable leakage inductance transformer includes a winding frame unit, a primary coil, a secondary coil and an iron core unit. Both the primary and secondary coils are arranged on the bobbin unit. The core unit is assembled on the bobbin unit and forms a magnetic path connecting the primary coil and the secondary coil.

The feature of the present invention is that the core unit includes a first core, a second core connected to the first core, a primary magnetic flux formed between the first core and the second core and close to the primary coil area, and a secondary magnetic flux area formed between the first core and the second core and close to the secondary coil, the bobbin unit is reserved around the core unit to allow the first, second The space where the iron core moves relative to each other, the effective magnetic flux area of the primary magnetic flux area is not equal to the effective magnetic flux area of the secondary magnetic flux area, and the secondary magnetic flux area is allowed to change under the relative movement of the first and second iron cores and maintain the primary flux region.

The beneficial effect of the present invention is that: if the inductance value of the secondary coil is found to be in error with the shipping standard during manufacture, the leakage magnetic flux of the secondary coil can be changed by means of the design of the relative movement of the first and second iron cores, and then Therefore, the inductance value of the secondary coil can reach the delivery standard, and the purpose of greatly improving the process yield can be achieved.

Description of drawings

Figure 1 is a schematic diagram illustrating a general transformer structure;

Fig. 2 is a schematic diagram illustrating the first preferred embodiment of the process-adjustable leakage inductance transformer of the present invention;

Fig. 3 is a schematic diagram illustrating the composition of a first iron core and a second iron core in the first preferred embodiment;

Fig. 4 is a schematic diagram illustrating the situation in which the first iron core protrudes from the second iron core in the first preferred embodiment;

Fig. 5 is a schematic diagram illustrating the second preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 6 is a schematic diagram illustrating another structural variation of the second core in the above-mentioned second preferred embodiment;

Fig. 7 is a schematic diagram illustrating the third preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 8 is a schematic diagram illustrating the fourth preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 9 is a schematic diagram illustrating the fifth preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 10 is a schematic diagram illustrating the sixth preferred embodiment of the process-adjustable leakage inductance transformer of the present invention;

Fig. 11 is a schematic diagram illustrating the seventh preferred embodiment of the process-adjustable leakage inductance transformer of the present invention;

Fig. 12 is a schematic diagram illustrating the eighth preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 13 is a schematic diagram illustrating the ninth preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 14 is a schematic diagram illustrating the tenth preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 15 is a schematic diagram illustrating an eleventh preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 16 is a schematic diagram illustrating a twelfth preferred embodiment of the process adjustable leakage inductance transformer of the present invention;

Fig. 17 is a schematic diagram illustrating a thirteenth preferred embodiment of the process-adjustable leakage inductance transformer of the present invention;

Fig. 18 is a schematic diagram illustrating the combination situation in the thirteenth preferred embodiment;

Fig. 19 is a schematic diagram illustrating the fourteenth preferred embodiment of the process-adjustable leakage inductance transformer of the present invention; and

Fig. 20 is a schematic diagram illustrating the constitution of the fourteenth preferred embodiment.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention is described in detail:

Before the present invention 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 2, 3 and 4, the first preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention includes a bobbin unit 20, a primary coil 30, a secondary coil 40, and an iron core unit 50 .

The primary and secondary coils 30 , 40 are both disposed on the bobbin unit 20 .

The iron core unit 50 is assembled on the bobbin unit 20 and forms a magnetic path connecting the primary coil 30 and the secondary coil 40. The iron core unit 50 includes a first iron core 51 and a first iron core connected to the first iron core. 51 of the second iron core 52, a primary magnetic flux region 53 (indicated by overlapping shadows) formed between the first iron core 51 and the second iron core 52 and close to the primary coil 30, and a A secondary magnetic flux region 54 between the first iron core 51 and the second iron core 52 and close to the secondary coil 40 (also indicated by overlapping shadows).

The bobbin unit 20 includes a through hole 21 extending along a long direction X, two reserved spaces 22 or openings respectively corresponding to two ends of the first core 51 , and a conductive sheet 23 embedded therein.

The reserved space 22 or opening in this embodiment refers to an open space (illustrated by a virtual wire frame) formed at both ends of the first iron core 51 along the moving direction (the long direction X). The bobbin frame unit 20 When designing, the reserved space 22 must be planned to allow relative movement of the first iron core 51 and the second iron core 52. In this embodiment, the reserved space 22 allows the first iron core 51 to move along the length. Direction X to move.

The conductive sheet 23 is electrically connected to one of the primary coil 30 and the secondary coil 40 and faces a metal portion 90 on a circuit board 201. The conductive sheet 23 and the metal portion 90 are equivalent to define a capacitor C , the capacitor C can provide the detection function of the protection circuit (not shown in the figure), and achieve the effect of adding an additional capacitor component.

The first iron core 51 is passed through the through hole 21 of the winding frame unit 20, and a primary magnetic flux area 53 and a secondary magnetic flux area 54 connected to the second iron core 52 are formed at both ends. The first iron core 51 It is an I-shaped iron core, and its length d1 is greater than the maximum length d2 between the primary magnetic flux area 53 and the secondary magnetic flux area 54 in this embodiment, so that a part of the first iron core 51 can be extended The through hole 21 is exposed, and the extended part can be easily accessed by the staff for adjustment work, and at the same time, it can also achieve the effect of expanding or shrinking the secondary magnetic flux area 54 without changing the primary magnetic flux area 53 .

The second core 52 is stacked on the first core 51 along a vertical direction Z. The second core 52 has two concave holes 521 respectively corresponding to the two ends of the first core 51. The primary magnetic flux area 53 and the secondary The secondary magnetic flux area 54 is respectively formed at the two ends of the first core 51 and the second core 52 in contact. As shown in FIG. 2 , the effective magnetic flux area of the primary magnetic flux area 53 is smaller than that of the secondary magnetic flux The effective magnetic flux area of the zone 54, and the effective magnetic flux area of the secondary magnetic flux zone 54 can be changed when the first core 51 moves along the long direction X, and the effective magnetic flux area of the primary magnetic flux zone 53 The magnetic resistance of the secondary magnetic flux area 54 can be changed, so that the error range of the leakage inductance can be reduced to 1%, so that the requirement of the shipping standard can be met.

In this way, if the inductance value of the secondary coil 40 is found to be in error with the shipping standard during manufacture, the leakage magnetic flux of the secondary coil 40 can be changed by designing the relative movement of the first core 51 and the second core 52, Glue is dispensed and fixed after the adjustment is completed, so that the leakage inductance value of the secondary coil 40 can reach the shipping standard, and the purpose of greatly improving the process yield can be achieved.

As shown in Fig. 5, the second preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below, the second preferred embodiment is substantially the same as the first preferred embodiment above, the difference Because the transformer 200 includes two primary coils 30 and two secondary coils 40, the bobbin unit 20 includes two bobbins 24 connected to each other, and the primary coils 30 are respectively arranged on the bobbins 24 and adjacent to each other, the secondary coils 40 are respectively arranged on the bobbin 24 and are far away from each other, the first core 51 has a thick width section 511 with different widths along the long direction X, And two thin width sections 512 respectively extending from the two ends of the thick width section 511, the thick width section 511 is corresponding to the primary coil 30 in the middle position, and the thin width section 512 is corresponding to the secondary coil 40 , different reluctances can be formed by different widths, and then cooperate with the movement of the first iron core 51 along the long direction X to produce more abundant reluctance changes in the state of no air gap, and then adjust the leakage magnetic flux, so that the leakage The sensory value can meet the shipping requirements.

In the above, the second core 52 is composed of two core blocks 520 in a "day" shape. In actual manufacturing, the core blocks 520 can also be changed to an O-shaped structure, as shown in FIG. 6 , the first The second core 52 can also be an O-shaped core that can be combined with the bobbin frame 24 at the same time, so it can be seen that the second core 52 can be made into multiple structural changes, and no matter what structural changes are adopted Under the technical purport of the present invention, the leakage inductance value can be adjusted with the first iron core 51 .

As shown in Figure 7, the third preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. Since the main change of the following embodiments is that the core unit 50 adopts a different design, the winding frame is omitted. The structure and each of the primary coil 30 and the secondary coil 40 are indicated by imaginary lines. The third preferred embodiment is substantially the same as the second preferred embodiment above, except that the core unit 50 also includes a fourth core 55, the first iron core 51 is an I-shaped iron core, the second iron core 52 and the fourth iron core 55 are connected in an O-shape along the long direction X and are superimposed on the first iron core 51 along the vertical direction Z in a C-shape core, the primary coil 30 and the secondary coil 40 surround the first core 51, the second core 52 and the fourth core 55 each have a concave hole 521, 551 corresponding to the end of the first core 51, The primary magnetic flux area 53 and the secondary magnetic flux area 54 are respectively formed at the ends where the first iron core 51, the second iron core 52, and the fourth iron core 55 are in contact. During manufacture, the first iron core 51 can be The long direction X moves to adjust the leakage inductance to meet the shipping requirements.

As shown in FIG. 8 , the fourth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The fourth preferred embodiment is substantially the same as the second preferred embodiment above. The second core 52 located in the core unit 50 is a C-shaped core extending along a vertical direction Z and stacked on the first core 51 along the vertical direction Z. The primary magnetic flux area 53 and the secondary magnetic flux area 54 are respectively formed on the two ends of the first iron core 51 and the second iron core 52 in contact with each other. During manufacture, the first iron core 51 can be moved along the long direction X to adjust leakage inductance to meet shipping requirements.

As shown in FIG. 9, the fifth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The fifth preferred embodiment is substantially the same as the fourth preferred embodiment above, except that The second core 52 located in the core unit is a U-shaped core extending along a transverse direction Y and stacked on the first core 51 along a vertical direction Z. The primary magnetic flux area 53 and the secondary magnetic flux area 54 They are respectively formed on the two ends of the first iron core 51 and the second iron core 52 that are in contact with each other. During manufacture, the first iron core 51 can be moved along the long direction X to adjust the leakage inductance to meet the shipping requirements.

As shown in FIG. 10, the sixth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The difference of the sixth preferred embodiment is that the core unit 50 includes an E-shaped and The second iron core 52 connected to the first iron core 51, and an adjustable magnetic flux region 55 formed between the first iron core and the second iron core, during manufacture, the first iron core 51 can be along the length direction X Move to change the adjustable magnetic flux area 55, and then adjust the leakage inductance to meet the shipping requirements.

As shown in FIG. 11, the seventh preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The seventh preferred embodiment is substantially the same as the sixth preferred embodiment above, except that The second core 52 located in the core unit 50 has three second extension sections 522 extending along a long direction X, and a second connection section 523 connected to the second extension sections 522. The first iron core 51 It is movably arranged at the end of the second extension section 522 along a transverse direction Y perpendicular to the long direction X, wherein the second extension section 522 on both sides forms two adjustable magnetic fluxes with the first core 51 zone 55 , during manufacture, the first core 51 can move along the transverse direction Y to change the adjustable magnetic flux zone 55 , and then adjust the leakage inductance to meet shipping requirements.

As shown in Fig. 12, the eighth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below, the eighth preferred embodiment is substantially the same as the seventh preferred embodiment above, the difference The second core 52 located in the core unit 50 has three second extension sections 522 extending along a transverse direction Y, and a second connection section 523 connected to the second extension sections 522. The first iron core 51 It is movably arranged at the end of the second extension section 522 along the long direction X, and has a notch 513 surrounding the second extension section 522 in the middle, between the notch 513 and the second extension section 522 An air gap is left to form the adjustable magnetic flux region, and the width of the notch 513 along the long direction X is wider than that of the second extending section 522 .

As shown in FIG. 13 , the ninth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The ninth preferred embodiment is substantially the same as the above-mentioned eighth preferred embodiment. The first iron core has a thick width section 511 and a thin width section 512 along the long direction X, and the second extension section 522 in the middle corresponds to the thin width section 512 and the two An air gap is left between them to form a central leakage adjustable magnetic flux area 55 .

As shown in FIG. 14, the tenth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The tenth preferred embodiment is substantially the same as the above-mentioned ninth preferred embodiment. The first iron core 51 has a thick width section 511 with unequal width along the long direction X, and a tapered width section 514 tapered from the thick width section 511 along the long direction X, wherein The second extending section 522 in the middle corresponds to the tapered section 514 in width.

As shown in FIG. 15, the eleventh preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The difference of the eleventh preferred embodiment is that the first core 51, the second The iron cores 52 are all E-shaped iron cores, and each has three first extension sections 515 and second extension sections 522. The adjustable magnetic flux region 55 and the primary coil 30 and the secondary coil 40 are formed between the extension section 515 and the second extension section 522, and the first iron core 51 and the second iron core 52 can move along the long direction X while changing the leakage inductance.

As shown in FIG. 16 , the twelfth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The twelfth preferred embodiment is substantially the same as the ninth preferred embodiment above. The difference is that the first core 51 has three notches 516 formed at the end of the first extension 515, the second core 52 has three notches 523 formed at the end of the second extension 522, the first The gaps 516 and 523 at the ends of the extension section 515 and the second extension section 522 are connected to each other, and the gap located in the middle is formed with the adjustable magnetic flux area 55, the first core 51, the second core 52 The leakage inductance can be changed by moving along the long direction X.

As shown in Figures 17 and 18, the thirteenth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below. The difference of the thirteenth preferred embodiment is that the core unit 50 also includes A third iron core 56, the first iron core 51 and the third iron core 56 are I-shaped iron cores stacked along the vertical direction Z, the second iron core 52 is an O-shaped iron core and has two spaced apart openings 524, the The first iron core 51 and the third iron core 53 respectively pass through the opening 524, and the primary magnetic flux area 53 and the secondary magnetic flux area 54 are respectively formed on the first iron core 51, the third iron core 56 and the The two ends contacted by the second core 52 , the first core 51 and the third core 56 can move relative to each other along the long direction X to achieve the effect of adjusting the leakage inductance.

As shown in Figures 19 and 20, the fourteenth preferred embodiment of the process adjustable leakage inductance transformer 200 of the present invention will be further described below, the fourteenth preferred embodiment is roughly the same as the eleventh preferred embodiment The same, except that the winding frame unit 20 includes two winding frames 24 connected to each other, the first iron core 51 and the third iron core 56 are I-shaped iron cores arranged side by side along the long direction X, and the second iron core 52 is The O-shaped iron core has two spaced openings 524, both ends of the first iron core 51 and the third iron core 56 are corresponding to the openings 524, the primary magnetic flux area 53 and the secondary magnetic flux area 54 They are respectively formed at the two ends where the first iron core 51, the third iron core 56 and the second iron core 52 are in contact. The first iron core 51 and the third iron core 56 can move relative to each other along the long direction X to adjust leakage. The effect of inductance.

It is worth mentioning that, in each of the above-mentioned preferred embodiments, whether it is the design of one set of primary coils 30 and secondary coils 40, or the design of multiple sets of primary coils 30 and secondary coils 40, and the design of different core units 50 The design of the structure, the present invention can change the structure of the bobbin unit 20 and the core unit 50, so that the manufacturer can keep the effective magnetic flux area of the primary magnetic flux area 53 unchanged and stable. The effect of adjusting the secondary magnetic flux area 54 and the magnetic flux can also be achieved, and then the effect of adjusting the leakage inductance values of all transformers to meet the shipping standard can be achieved.

Claims (24)

1. process leakage-adjustable inductance transformer, comprise a drum stand unit, a primary coil, a level coil, an and core unit, described primary coil, secondary coil all are to be arranged at described drum stand unit, described core unit is the flux path that is mounted on described drum stand unit and forms the described primary coil of a connection, secondary coil, it is characterized in that:

Described core unit comprises one first iron core, one is connected in second iron core of described first iron core, one is formed between described first iron core and described second iron core and the primary flux district of close described primary coil, reaching one is formed between described first iron core and described second iron core and the secondary magnetic flux district of close described secondary coil, described drum stand unit is reserved with around described core unit allows described first iron core, the space that second iron core relatively moves, the useful flux area in the useful flux area in described primary flux district and described secondary magnetic flux district is unequal, and allows at described first iron core, second iron core relatively moves down and changes described secondary magnetic flux district and keep described primary flux district.

2. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: described drum stand unit comprises a perforation along length direction extension, described first iron core is the perforation that is arranged in described drum stand unit, and two ends are formed with and described second primary flux district, the secondary magnetic flux district that links to each other unshakable in one's determination.

3. according to the described process leakage-adjustable inductance transformer of claim 2, it is characterized in that: described drum stand unit also comprises two headspace or the openings that correspond respectively to described first two ends unshakable in one's determination, and described headspace or opening allow that described first iron core moves along described length direction.

4. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: described drum stand unit comprises that also one is embedded in interior conducting strip, described conducting strip is and wherein being electrically connected and metal part on the circuit board of described primary coil, secondary coil that described conducting strip and described metal part are that equivalence defines an electric capacity.

5. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: the length of described first iron core is the maximum length that is not equal between described primary flux district and the described secondary magnetic flux district.

6. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: first iron core of described core unit is an I shape iron core, described second iron core is the O shape iron core that is stacked and placed on described first iron core along a vertical direction, described second iron core has two shrinkage pools that correspond respectively to described first two ends unshakable in one's determination, and described primary flux district is to be formed at described first two ends that contacted with described second iron core unshakable in one's determination respectively with described secondary magnetic flux district.

7. according to the described process leakage-adjustable inductance transformer of claim 5, it is characterized in that: described drum stand unit comprises two drum stands that link mutually, described transformer comprises two primary coils and two secondary coils, described primary coil is to be arranged at respectively on the described drum stand and adjacent one another are, described secondary coil be arranged on the described drum stand respectively and mutually away from, described first iron core is to extend along a length direction, and have along described length direction and be the thick width section that width does not wait, and two thin width section of extending from described thick width section two ends respectively, described thick width section is corresponding to described primary coil, and described thin width section is corresponding to described secondary coil.

8. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: described core unit also comprises a four-limbed, described first iron core is an I shape iron core, described second iron core, four-limbed are to connect into O shape and be stacked and placed on C core on described first iron core along described vertical direction along described length direction, described second iron core, four-limbed respectively have a shrinkage pool corresponding to described first core end, and described primary flux district is to be formed at described first end that is contacted with described second iron core, four-limbed unshakable in one's determination respectively with described secondary magnetic flux district.

9. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: first iron core of described core unit is an I shape iron core, described second iron core is to extend and be stacked and placed on the C core of described first iron core along described vertical direction along a vertical direction, and described primary flux district is to be formed at the both ends that described first iron core is contacted with described second iron core respectively with described secondary magnetic flux district.

10. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: first iron core of described core unit is an I shape iron core, described second iron core is to extend and be stacked and placed on the U-iron heart of described first iron core along a vertical direction along a transverse direction, and described primary flux district is to be formed at the both ends that described first iron core is contacted with described second iron core respectively with described secondary magnetic flux district.

11. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: described core unit also comprises one the 3rd iron core, described first iron core, the 3rd iron core are along the stacked I shape iron core of a vertical direction, described second iron core is an O shape iron core, and have two openings separately, described first iron core, the 3rd iron core are to be extended through respectively in the described opening, and described primary flux district is to be formed at described first iron core, the 3rd two ends that contacted with described second iron core unshakable in one's determination respectively with described secondary magnetic flux district.

12. according to the described process leakage-adjustable inductance transformer of claim 1, it is characterized in that: described drum stand unit comprises two drum stands that link mutually, described primary coil, secondary coil is to be arranged on the described drum stand, described core unit also comprises one the 3rd iron core, described first iron core, the 3rd iron core is along length direction I shape iron core side by side, described second iron core is an O shape iron core, and have two openings separately, described first iron core, the two ends of the 3rd iron core all are corresponding in the described opening, and described primary flux district and described secondary magnetic flux district are formed at described first iron core respectively, the 3rd two ends that contacted with described second iron core unshakable in one's determination.

13. process leakage-adjustable inductance transformer, comprise a drum stand unit, a primary coil, a level coil, an and core unit, described primary coil, secondary coil all are to be arranged at described drum stand unit, described core unit is the flux path that is mounted on described drum stand unit and forms the described primary coil of a connection, secondary coil, it is characterized in that:

Described core unit comprises that one is first iron core of E shape, one is E shape and is connected in second iron core of described first iron core, an and adjustable magnetic flux district, described first iron core has first linkage section that three first extensions and are connected in described first extension, described second iron core has second linkage section that three second extensions and are connected in described second extension, described first extension, second extension is to link to each other interlaced with each otherly, and first extension in the middle of being positioned at, be formed with described adjustable magnetic flux district between second extension and be provided with described primary coil, secondary coil, described drum stand unit is reserved with around described core unit allows described first iron core, the space that second iron core relatively moves, described adjustable magnetic flux district allows at described first iron core, the change that relatively moves down of second iron core.

14. process leakage-adjustable inductance transformer, comprise a drum stand unit, a primary coil, a level coil, an and core unit, described primary coil, secondary coil all are to be arranged at described drum stand unit, described core unit is the flux path that is mounted on described drum stand unit and forms the described primary coil of a connection, secondary coil, it is characterized in that:

Described core unit comprises that one is first iron core of E shape, one is E shape and is connected in second iron core of described first iron core, an and adjustable magnetic flux district, described first iron core has three first extensions, one is connected in first linkage section of described first extension, and three breach that are formed at the described first extension end, described second iron core has three second extensions, one is connected in second linkage section of described second extension, and three breach that are formed at the described second extension end, described first extension, the breach of the second extension end is involutory each other linking to each other, and involutory described breach is formed with described adjustable magnetic flux district in the middle of being positioned at, described first extension, second extension also is provided with described primary coil, secondary coil, described drum stand unit is reserved with around described core unit allows described first iron core, the space that second iron core relatively moves, described adjustable magnetic flux district allows at described first iron core, the change that relatively moves down of second iron core.

15. process leakage-adjustable inductance transformer, comprise a drum stand unit, a primary coil, a level coil, an and core unit, described primary coil, secondary coil all are to be arranged at described drum stand unit, described core unit is the flux path that is mounted on described drum stand unit and forms the described primary coil of a connection, secondary coil, it is characterized in that:

Described core unit comprises that first iron core, that is I shape is E shape and is connected in second iron core of described first iron core, reach an adjustable magnetic flux district that is formed between described first iron core and described second iron core, described drum stand unit is reserved with the space of allowing that described first iron core, second iron core relatively move around described core unit, described adjustable magnetic flux district allows change under described first iron core, second iron core relatively move.

16. according to the described process leakage-adjustable inductance transformer of claim 15, it is characterized in that: second iron core of described core unit has three second extensions of extending along a length direction, and second linkage section that is connected in described second extension, described first iron core is to be stacked and placed on the described second extension end movably along described length direction, second extension in the middle of wherein being positioned at and the described first described adjustable magnetic flux district that forms unshakable in one's determination.

17. according to the described process leakage-adjustable inductance transformer of claim 15, it is characterized in that: second iron core of described core unit has three second extensions of extending along a length direction, and second linkage section that is connected in described second extension, described first iron core is to be arranged at the described second extension end movably along a transverse direction perpendicular to described length direction, second extension in the middle of wherein being positioned at and the described first described adjustable magnetic flux district that forms unshakable in one's determination.

18. according to the described process leakage-adjustable inductance transformer of claim 15, it is characterized in that: second iron core of described core unit has three second extensions of extending along a transverse direction, and second linkage section that is connected in described second extension, described first iron core is to be arranged at the described second extension end movably along a length direction, and to have a breach be in second extension of centre around the position, leave air gap between described breach and described second extension forming described adjustable magnetic flux district, and described breach is wideer than described second extension along the width of described length direction.

19. according to the described process leakage-adjustable inductance transformer of claim 15, it is characterized in that: second iron core of described core unit has three second extensions of extending along a transverse direction, and second linkage section that is connected in described second extension, described first iron core is to be arranged at the described second extension end movably along a length direction, and have along described length direction and be the thick width section that width does not wait, reach a thin width section, its meta is corresponding to described thin width section in second extension of centre and leaves air gap between the two to form described adjustable magnetic flux district.

20. according to the described process leakage-adjustable inductance transformer of claim 15, it is characterized in that: second iron core of described core unit has three second extensions of extending along a transverse direction, and second linkage section that is connected in described second extension, described first iron core is to be arranged at the described second extension end movably along a length direction, and have along described length direction and be the thick width section that width does not wait, and a taper in width section that is taper in width from described thick width section along described length direction, its meta is corresponding to described taper in width section in second extension of centre.

21. according to the described process leakage-adjustable inductance transformer of claim 17, it is characterized in that: the length of described first iron core is along maximum length that described length direction was linked to be greater than described second extension.

22. according to the described process leakage-adjustable inductance transformer of claim 18, it is characterized in that: the length of described first iron core is along maximum length that described length direction was linked to be greater than described second extension.

23. according to the described process leakage-adjustable inductance transformer of claim 19, it is characterized in that: the length of described first iron core is along maximum length that described length direction was linked to be greater than described second extension.

24. according to the described process leakage-adjustable inductance transformer of claim 15, it is characterized in that: described drum stand unit comprises that also one is embedded in interior conducting strip, described conducting strip is and wherein being electrically connected and metal part on the circuit board of described primary coil, secondary coil that described conducting strip and described metal part are that equivalence defines an electric capacity.

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