CN210378713U

CN210378713U - Resonant transformer

Info

Publication number: CN210378713U
Application number: CN201921785662.9U
Authority: CN
Inventors: 华强; 曹永涛
Original assignee: Wuhan Street Lamp Management Service Center; Hangzhou Zhongheng Power Energy Co ltd
Current assignee: Wuhan Street Lamp Management Service Center; Zhejiang Paiwei Digital Technology Co ltd
Priority date: 2019-05-29
Filing date: 2019-10-22
Publication date: 2020-04-21
Anticipated expiration: 2029-10-22
Also published as: CN110085400A; CN110534316A

Abstract

The utility model discloses a resonant transformer, which comprises a primary winding, a secondary winding and a winding iron core for fixing the primary winding and the secondary winding; the winding iron core is provided with a first iron core column for fixing the primary winding and a second iron core column for fixing the secondary winding; the secondary winding comprises a secondary side wire frame used for winding the auxiliary winding and a metal sheet wound on the second iron core column and used as a secondary winding coil, and the secondary side wire frame is sleeved on the second iron core column. The utility model provides a resonant mode transformer, the volume is less relatively, and output density and current density are higher, and heat dispersion is good.

Description

Resonant transformer

Technical Field

The utility model relates to a transformer technical field, in particular to resonant mode transformer.

Background

In practical applications, because the primary winding and the secondary winding are wound at different positions on a single bobbin (winding base) at the same time, inserting heat-insulating sleeves and connecting wires, except for the winding, consumes considerable manpower, thereby increasing manpower and working hours; meanwhile, the primary and secondary windings are arranged on the same wire frame, which easily causes the disadvantages of insufficient safety distance, poor consistency of leakage inductance and the like, and leads to the need of adding extra inductance to serve as resonant inductance. When the output current is large, a secondary side winding is wound by adopting multiple stranded wires, but the outgoing wires and the wiring are difficult due to the excessive number of the enameled wires, and gaps are generated among all conducting wires (the enameled wires), so that the size of the winding and even the size of the transformer cannot be reduced, and the heat dissipation performance of the transformer is poor.

Therefore, how to optimize the structure of the resonant transformer, reduce the volume of the resonant transformer, and improve the heat dissipation performance of the resonant transformer becomes a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a resonant mode transformer, the whole volume of this transformer is less, and output density and output current density are high, and heat dispersion is better.

In order to achieve the above object, the present invention provides a resonant transformer, including a primary winding, a secondary winding, and a winding core for fixing the primary winding and the secondary winding;

the winding iron core is provided with a first iron core column for fixing the primary winding and a second iron core column for fixing the secondary winding;

the secondary winding comprises a secondary side wire frame used for winding the auxiliary winding and a metal sheet wound on the second iron core column and used as a secondary winding coil, and the secondary side wire frame is sleeved on the second iron core column.

Optionally, the metal sheet includes a ring portion for winding the second core limb, and further includes current output terminals extending in a turning manner relative to two ends of the ring portion for outputting current.

Optionally, the metal sheet is a copper sheet.

Optionally, the primary winding includes a primary winding coil and a primary side bobbin for winding the primary winding coil, and the primary side bobbin is sleeved on the first core limb.

Optionally, the primary side bobbin comprises a pair of primary side baffles arranged in parallel and a primary side spacer arranged between the pair of primary side baffles;

the primary side spacer and the pair of primary side baffles form two primary side wire frame grooves for winding the primary winding coil, and the primary side connecting terminal is arranged at the bottom of the primary side wire frame.

Optionally, an isolation cover for isolating the primary winding and the secondary winding is further arranged between the primary winding and the secondary winding.

Optionally, the isolation cover is in a shape of a notch, and the notch of the isolation cover is provided with a side folding edge for slidably clamping the pair of primary side baffles.

Optionally, the secondary winding further comprises a secondary side bobbin frame for sleeving the secondary side bobbin;

the secondary side wire frame is provided with a secondary side baffle which is arranged oppositely and used for accommodating the secondary side wire frame, and the secondary side wire frame also comprises a secondary side wiring terminal which is arranged at the bottom of the secondary side wire frame and used for connecting an auxiliary winding.

Optionally, the secondary side wire frame is in a shape of a notch, and the notch of the secondary side wire frame is arranged opposite to the notch of the isolation cover.

Optionally, the winding iron core includes relative setting iron core upper prop and iron core lower prop, the iron core upper prop with the iron core lower prop all includes iron core seat and perpendicular two iron core posts that the iron core seat extends, the iron core upper prop with the iron core lower prop the iron core post dock each other in order to form first iron core post with the second iron core post.

Compared with the prior art, the utility model provides a resonant mode transformer includes the winding iron core and is fixed in the primary winding and the secondary winding of winding iron core, and primary winding and secondary winding fix respectively on the first iron core post and the second iron core post of winding iron core, and the secondary winding is used for acting as the sheetmetal of secondary winding coil including the secondary side line frame and the coiling that are used for coiling auxiliary winding at the second iron core post. The leakage inductance of the auxiliary winding serves as a resonant inductor, the metal sheet is used as a secondary winding coil to replace a traditional enameled wire winding coil, the distance between every two wires in the winding coil is reduced, and the height of the secondary winding coil is reduced, so that the whole resonant transformer is flat, the size is reduced, the cross-sectional area of the secondary winding coil is enlarged due to the flat shape, and the heat dissipation of the resonant transformer is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is an overall structural diagram of a resonant transformer according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view C-C of FIG. 2;

FIG. 4 is a front view of FIG. 1;

FIG. 5 is a cross-sectional view B-B of FIG. 4;

fig. 6 is an exploded view of fig. 1.

Wherein:

1-iron core upper column, 2-iron core lower column, 3-primary side coil holder, 31-primary side baffle, 32-primary side spacer, 33-primary side wiring terminal, 4-primary winding coil, 5-isolation cover, 51-side folding edge, 6-secondary side coil holder, 7-metal sheet, 71-current output terminal, 8-secondary side coil holder frame, 81-secondary side baffle and 82-secondary side wiring terminal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 6, fig. 1 is an overall structural diagram of a resonant transformer according to an embodiment of the present invention; FIG. 2 is a top view of FIG. 1; FIG. 3 is a cross-sectional view C-C of FIG. 2; FIG. 4 is a front view of FIG. 1; FIG. 5 is a cross-sectional view B-B of FIG. 4; fig. 6 is an exploded view of fig. 1.

The utility model provides a resonant transformer, which comprises a primary winding, a secondary winding and a winding iron core, wherein the primary winding and the secondary winding are respectively wound on a first iron core column and a second iron core column of the winding iron core; the secondary winding comprises a secondary side coil support 6 for winding the auxiliary winding and a metal sheet 7 for serving as a secondary winding coil, the metal sheet 7 is wound on the second iron core column, the width direction of the metal sheet 7 is vertical to the length direction of the second iron core column, the metal sheet serves as the secondary winding coil and the primary winding coil 4 output working current through mutual inductance, and the auxiliary winding serves as a resonant inductor. The secondary winding adopts the metal sheet 7 to replace an enameled wire to serve as a secondary winding coil, the distance between conducting wires (the enameled wire of the secondary winding) is reduced, and the height of the secondary winding coil is obviously reduced, so that the height and the size of the transformer are reduced, the resonant transformer is flat on the whole, the cross-sectional area of the secondary winding coil is enlarged, the heat dissipation performance is good, and the heat dissipation effect of the metal sheet 7 is better than that of a multi-turn enameled wire.

The resonant transformer provided by the present invention is described in more detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 6, in an embodiment of the present invention, a flat-type resonance transformer includes a primary winding, a secondary winding, and a winding core; the winding iron core is formed by iron core upper prop 1 and iron core lower prop 2 concatenation, and iron core upper prop 1 and iron core lower prop 2 structural basic symmetry, and the two all includes two iron core posts that iron core seat and perpendicular iron core seat extend, and iron core upper prop 1 and iron core lower prop 2's iron core post size match each other, and the interval of the two iron core post is the same, so that splice each other and form the second iron core post that is used for fixing the first iron core post of primary winding and is used for fixing secondary winding.

The primary winding comprises a primary side coil frame 3 and a primary winding coil 4, the primary winding coil 4 is wound on the primary side coil frame 3, the primary side coil frame 3 is sleeved on the first iron core column, and the primary winding can be conveniently maintained by mutually separating or splicing the iron core upper column 1 and the iron core lower column 2. Further, the primary side bobbin 3 may have a structure as shown in fig. 1, which includes a pair of primary side blocking pieces disposed opposite to each other, a primary side spacer 32 disposed between the pair of primary side blocking pieces, two primary side bobbin slots for winding and fixing the primary winding coil 4 formed between the primary side blocking pieces and the primary side spacer 32, and a primary side terminal 33 disposed at the bottom of the primary side bobbin 3 for connecting the primary side winding coil 4. In other words, the primary side bobbin slots for accommodating the primary winding coil 4 are formed by the alternate arrangement of the primary side blocking pieces and the primary side spacers 32, and the arrangement of the primary winding is described above only by the specific embodiment, but it should not be understood as a specific limitation to the structure of the primary winding, and the number of the primary side blocking pieces or the primary side spacers 32 may be adjusted as needed, that is, the number of the primary side bobbin slots may be specifically set as needed by the primary winding coil 4.

The secondary winding comprises a secondary side wire frame 6 sleeved on the second iron core column, and the secondary side wire frame 6 is used for winding the auxiliary winding; the second iron core post still twines has the sheetmetal 7 that is used for acting as the secondary side winding coil, as the utility model discloses a core improvement point adopts sheetmetal 7 winding second iron core post, and sheetmetal 7 is mutual-inductive with primary winding coil 4, produces voltage transformation and output operating current. The structure of the metal sheet 7 wound around the second core limb can refer to fig. 6, and it should be noted that the metal winding manner shown in fig. 6 is only a schematic illustration, and does not mean that the metal sheet 7 is wound around the second core limb only for one turn, the metal sheet 7 can be wound around the second core limb for multiple turns, and insulation is provided between layers of the metal sheet 7 according to the transformation ratio of the resonant transformer and actual requirements; the metal sheet 7 is preferably a copper sheet, and the copper sheet has good electric conductivity and heat dissipation performance. The metal sheet 7 includes a ring-shaped portion wound around the second core limb, and further includes current output terminals 71 extending downward along two ends of the ring-shaped portion, and the current output terminals 71 can be connected to a circuit board or a wire to output an operating current.

The number of the metal sheets 7 may be plural, and the plural metal sheets 7 are respectively disposed above or below the secondary side bobbin 6, or are disposed symmetrically with respect to both sides of the secondary side bobbin 6. In order to ensure the insulation effect between the primary winding and the secondary winding and prevent the breakdown phenomenon, a shielding case 5 for isolating the primary winding and the secondary winding is also arranged between the primary winding and the secondary winding, and the insulating distance between the primary winding and the secondary winding is ensured to be larger than 6mm by arranging the shielding case 5, so that the operation safety of the resonant transformer is ensured. The isolation groove is in a notch shape, and the notch of the isolation groove is used for being sleeved on the primary side wire frame 3. Further, the notch of the isolation slot has a side folded edge 51 for slidably engaging with the pair of primary side baffles 31, the primary side baffles 31 are provided with corresponding sliding slots, the sliding slots are matched with the sliding slots by arranging sliding rails on the side folded edge 51, and the isolation slot is sleeved on the primary side baffles 31 of the primary side bobbin 3 to form an insulation isolation for the primary winding and the secondary winding.

As another core of the utility model, the distance between the primary side coil frame 3 and the secondary side coil frame 6 is effectively controlled by the arrangement of the isolation cover 5, and the characteristics of the resonant transformer such as leakage inductance and the like are controlled; and the metal sheet 7 is adopted to replace an enameled wire to serve as a secondary winding coil, so that the cross section area of the secondary winding is enlarged, and the heat dissipation performance of the transformer is improved.

In another preferred embodiment provided by the present invention, the secondary winding further includes a secondary side wire frame 8 sleeved on the periphery of the secondary side wire frame 6, the secondary side wire frame 8 has a pair of oppositely disposed secondary side baffles 81, the pair of secondary side baffles 81 are used for clamping and accommodating the secondary side wire frame 6, a secondary side connecting terminal 82 is further disposed at the bottom of the secondary side wire frame 8, and the secondary side connecting terminal 82 is connected to the auxiliary winding.

The secondary side wire frame 8 is also in a notch shape, so that the secondary side wire frame 6 can conveniently slide into the notch fixed on the secondary side wire frame 8 through the notch, the notch of the secondary side wire frame 8 and the notch of the isolation cover 5 are arranged in a back direction, the secondary side wire frame 8 not only provides a wiring terminal of an auxiliary winding, but also further ensures the insulation and isolation of the primary winding and the secondary winding, and also plays a role in fixing the secondary side wire frame 6. Fig. 2 to 5 clearly illustrate the assembly of the resonant transformer by combining the sectional views in different directions with the exploded view.

The utility model provides a resonant mode acts as the secondary winding coil through adopting sheetmetal 7, makes resonant mode transformer whole be the platykurtic, and the cross-sectional area of secondary winding coil increases, and heat dispersion is good, and the insulating distance of primary winding and secondary winding has then effectively controlled in the setting of cage 5, ensures resonant mode transformer's operation safety.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The resonant transformer provided by the present invention has been described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A resonant transformer is characterized by comprising a primary winding, a secondary winding and a winding iron core for fixing the primary winding and the secondary winding;

the secondary winding comprises a secondary side coil holder (6) used for winding the auxiliary winding and a metal sheet (7) wound on the second iron core column and used as a secondary winding coil, and the secondary side coil holder (6) is sleeved on the second iron core column.

2. The resonant transformer of claim 1, wherein the metal sheet (7) comprises a ring portion for winding the second core leg, and further comprises a current output terminal (71) extending in a zigzag manner with respect to both ends of the ring portion for outputting a current.

3. Resonant transformer according to claim 2, characterized in that the metal sheet (7) is a copper sheet.

4. The resonant transformer of claim 2, wherein the primary winding comprises a primary winding coil (4) and a primary side bobbin (3) for winding the primary winding coil (4), and the primary side bobbin (3) is sleeved on the first core leg.

5. The resonant transformer according to claim 4, wherein the primary side bobbin (3) includes a pair of primary side plates (31) arranged in parallel with each other and a primary side spacer (32) provided between the pair of primary side plates (31);

the primary side spacer (32) and the pair of primary side baffles (31) form two primary side wire frame slots for winding the primary winding coil (4), and further comprise a primary side wiring terminal (33) arranged at the bottom of the primary side wire frame (3).

6. Resonant transformer according to claim 5, characterized in that an isolation cover (5) is provided between the primary winding and the secondary winding to isolate the two.

7. The resonant transformer according to claim 6, wherein the isolation cover (5) is formed in a recess shape, and the recess of the isolation cover (5) has side flanges (51) for slidably engaging the pair of primary side plates (31).

8. The resonant transformer of claim 7, wherein the secondary winding further comprises a secondary side bobbin frame (8) for sleeving the secondary side bobbin (6);

the secondary side wire frame (8) is provided with a secondary side baffle (81) which is arranged oppositely and used for accommodating the secondary side wire frame (6), and the secondary side wire frame also comprises a secondary side wiring terminal (82) which is arranged at the bottom of the secondary side wire frame (8) and used for connecting an auxiliary winding.

9. The resonant transformer according to claim 8, wherein the secondary side wire frame is notched, and the notch of the secondary side wire frame (8) is disposed opposite to the notch of the isolation cover (5).

10. A resonant transformer according to claim 9, characterized in that the winding core comprises oppositely arranged core upper leg (1) and core lower leg (2), the core upper leg (1) and the core lower leg (2) each comprising a core base and two core legs extending perpendicular to the core base, the core legs of the core upper leg (1) and the core lower leg (2) being butted against each other to form the first core leg and the second core leg.