CN211150290U - Switching power supply structure - Google Patents

Abstract

The utility model discloses a switching power supply structure, including transformer and output rectifier, the transformer includes the secondary main part, the secondary main part is equipped with two at least installation space, the secondary main part is connected with first cylinder and the center is taken a percentage, the center is taken a percentage and is kept apart with first cylinder, take out overhead being connected with in the center and the isolated second cylinder of secondary main part, be equipped with iron core and primary winding in the installation space in the secondary main part, iron core and primary winding are located between first cylinder and the secondary main part and are located between second cylinder and the secondary main part, first cylinder, the second cylinder all with output rectifier electric connection, between primary winding and the secondary main part, all be equipped with the insulating layer between iron core and the primary winding. The secondary side main body is of an integrated structure, each installation space shares one secondary side main body, and the common output electrode of the transformer unit in each installation space can reduce the time required for assembling the switching power supply structure, the production and the manufacture are simpler and quicker, and the cost is reduced.

Description

Switching power supply structure

Technical Field

The utility model relates to a switching power supply structure.

Background

The traditional switching power supply structure comprises a transformer and an output rectifier, wherein the transformer is made of a conductive material, and a protection box is also used as a low-voltage winding, so that the transformer has the characteristics of compact structure and low loss, but a welding technology is required during processing, the requirement on the welding technology is high, insulation is difficult to treat, and the difficulty in production and manufacturing is increased; and the secondary side adopts a shell type, the cross section area is not large, and the output of large current is not easy to realize.

Therefore, the applicant discloses a transformer with a new structure in a utility model with a patent publication number of CN101083167A, the transformer comprises an iron core, a primary winding and a secondary side, the secondary side is composed of a left seat body and a right seat body which are separated by a certain distance, a left groove and a right groove are respectively arranged on the left seat body and the right seat body, and the left groove divides the left seat body into a left middle column and a left outer seat body which are connected; the right groove divides the right seat body into a right middle column and a right outer seat body which are connected; an iron core and a primary winding are arranged in the left groove and the right groove, and insulating layers are respectively arranged between the primary winding and the secondary winding and between the primary winding and the iron core. The transformer is simple in structure, welding is avoided, and manufacturing difficulty of the transformer is simplified.

However, the switching power supply structure using the above transformer has the following disadvantages: 1. when large current output is needed, more than two output circuits of the transformer need to be connected in parallel one by one, so that the assembly and connection procedures are very complicated and complicated, and the misconnection condition is easy to occur; 2. the left seat body and the right seat body need to be manufactured independently, the sizes and the shapes of the left seat body and the right seat body need to be matched with each other, and the requirement on machining precision is high; 3. the left groove is positioned between the left center pillar and the left outer seat body, and the right groove is positioned between the right center pillar and the right outer seat body, so that the processing and manufacturing difficulty of the left groove and the right groove is high; 4. the cooling loops of the left seat body and the right seat body of the transformer are mutually independent, need to be processed and formed independently, and are spliced and combined, so that the transformer is very inconvenient; 5. the voltage of an external power supply connected to the switching power supply structure may have large fluctuation, which affects the stability of the current output by the switching power supply structure.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide a switching power supply structure which is easy and convenient to assemble and produce and can allow large current to pass through.

The utility model provides a technical scheme that its technical problem adopted is:

a switching power supply structure comprises a transformer and an output rectifying device, wherein the transformer comprises a secondary side main body which is isolated from the output rectifying device; the mounting spaces are arranged on the auxiliary side main body, and a first column body connected with the auxiliary side main body is arranged in each mounting space; the center tap is connected to the secondary side main body and is isolated from the first cylinder; the second cylinder is connected to the central tap and is isolated from the secondary side main body; the secondary main body, the first column body and the second column body are all solid structures through which large current can pass, and all installation spaces share the secondary main body of an integrated structure; the iron core and the primary winding are arranged in the installation space, are positioned between the first cylinder and the secondary main body, and are positioned between the second cylinder and the secondary main body; the first column body and the second column body are electrically connected with the output rectifying device; and insulation layers are arranged between the primary winding and the secondary main body and between the iron core and the primary winding.

As the utility model discloses a preferred embodiment, output rectifier device includes the metal heating panel and connects at least a set of output rectification group on the metal heating panel, the quantity of output rectification group with installation space's quantity is unanimous, the metal heating panel with vice limit main part is kept apart mutually, output rectification group includes first output subassembly and second output subassembly, first output subassembly and first cylinder electric connection, second output subassembly and second cylinder electric connection. The current generated by the transformer can be rectified by the output rectifying group, and then converged by the metal radiating plate to be output.

As the preferred embodiment of the present invention, the metal heat dissipation plate is provided with a first cooling chamber therein, and the first cooling chamber is provided with a first inlet and a first outlet which are communicated with the external cooling fluid. The heat generated by the output rectifying device can exchange heat with external cooling fluid through the metal heat dissipation plate, so that the heat dissipation of the output rectifying device is promoted.

As the preferred embodiment of the present invention, the installation space includes an installation counter bore which is opened on the secondary main body and is matched with the iron core and the primary winding, the first cylinder is fixedly connected to the installation counter bore, part or all of the first cylinder is accommodated in the installation counter bore, the second cylinder is fixedly connected to the center tap, and part or all of the second cylinder is accommodated in the installation counter bore. A coupling loop is formed among the first cylinder, the secondary main body and the center tap, another coupling loop is formed among the second cylinder, the center tap and the secondary main body, the mounting counter bore is used as a mounting space for accommodating the iron core and the primary winding, and the structure of the switching power supply structure is simple and reasonable and can realize large-current output by combining the first cylinder, the second cylinder, the secondary main body and the center tap.

Further preferably, the center tap and the secondary side main body are fixedly connected and cover in the top of the installation counter bore, the center tap is provided with a first avoidance hole, the lower part of the first cylinder is fixedly connected to the installation counter bore, the upper part of the first cylinder upwards penetrates through the first avoidance hole, the first avoidance hole is isolated from the first cylinder, the secondary side main body is provided with a second avoidance hole penetrating through the installation counter bore, the upper part of the second cylinder is fixedly connected to the center tap, the lower part of the second cylinder downwards penetrates through the second avoidance hole, and the second avoidance hole is isolated from the second cylinder. Wherein, the center is taken a percentage as public output electrode, and first cylinder is as a vice limit output, and the second cylinder is as another vice limit output, is favorable to the production equipment, makes the utility model discloses a switching power supply structure's production preparation is simpler and swift.

In some embodiments of the present invention, the first cylinder and the second cylinder are half cylinders, the side plane of the first cylinder is opposite to the side plane of the second cylinder, and the installation counter bore is formed outside the first cylinder and the second cylinder for accommodating the iron core and the annular groove of the primary winding.

As a preferred embodiment of the present invention, the second column in each installation space is electrically connected to the first column through the same center tap. The first cylinder, the second cylinder, the center tap and the secondary side main body in each installation space jointly form a transformer unit with a double-output circuit, the second cylinders in the installation spaces are electrically connected through the same center tap, the transformer units can be connected with one another, the output circuits of the transformer units do not need to be converged independently, the assembly efficiency of the switching power supply structure is greatly improved, and the assembly cost is reduced.

According to the switching power supply structure, the input rectifying device and the inverter are arranged on the outer side wall of the secondary main body in an insulating mode, an external alternating current circuit is electrically connected with the input rectifying device, the inverter and the primary winding in sequence, voltage input to the primary winding is further stabilized, and stability of output voltage and current of the switching power supply structure is further guaranteed.

In the above switching power supply structure, preferably, a second cooling cavity is provided inside the secondary side main body, and the second cooling cavity is provided with a second liquid inlet and a second liquid outlet which are communicated with external cooling fluid. The cooling fluid flows out from the second liquid outlet after entering from the second liquid inlet, can carry out heat exchange to the vice limit main part, takes away a large amount of heats that produce with the transformer during operation of switching power supply structure, makes the temperature rise of transformer can not too high, has avoided the load capacity decline of switching power supply structure.

As above switching power supply structure, preferably, the secondary side main body is a cuboid, the secondary side main body has a plurality of installation spaces distributed at intervals along the length direction thereof, the second cooling cavity includes a first cooling pipeline and a second cooling pipeline which are arranged on the secondary side main body and respectively located at two sides of the installation spaces, the first cooling pipeline and the second cooling pipeline are communicated through a connecting channel, one of the first cooling pipeline and the second cooling pipeline is provided with a second liquid inlet, and the other one is provided with a second liquid outlet. The second cooling cavity with the structure can increase the area of heat exchange with the secondary side main body, and the heat exchange efficiency is improved.

Has the advantages that: the secondary main part of the transformer of the switch power supply structure is of an integrated structure, a secondary main part is shared by all installation spaces in the secondary main part, a transformer unit with a double output circuit is formed between a first cylinder, a second cylinder and a center tap in each installation space and the secondary main part, the secondary main part is used as a public output electrode of each transformer unit, the time required by assembled products can be greatly reduced, the utility model discloses a production and manufacture of the switch power supply structure are simpler and faster, and the production cost is reduced.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of an embodiment of a switching power supply structure of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 3 is a schematic diagram of an embodiment of a transformer;

FIG. 4 is an exploded view of the core and primary winding of FIG. 3 with the core and primary winding removed;

FIG. 5 is a schematic cross-sectional view A-A of FIG. 3;

FIG. 6 is a schematic cross-sectional view B-B of FIG. 3;

FIG. 7 is a schematic cross-sectional view C-C of FIG. 3;

fig. 8 is an electrical schematic of the embodiment of fig. 1.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

Referring to fig. 1 to 5, a switching power supply structure includes a transformer 10 and an output rectifying device 20, the transformer 10 including a secondary main body 11, the secondary main body 11 being isolated from the output rectifying device 20; at least two mounting spaces arranged on the secondary side main body 11, wherein a first column 12 connected with the secondary side main body 11 is arranged in each mounting space; a center tap 14 connected to the secondary side body 11 and spaced apart from the first cylinder 12; a second cylinder 13 connected to the center tap 14 and isolated from the secondary side body 11; the secondary main body 11, the first column 12 and the second column 13 are all solid structures through which large current can pass, and each installation space shares the secondary main body 11 with an integral structure; the transformer comprises an iron core 71 and a primary winding 72 wound on the iron core 71, wherein the iron core 71 and the primary winding 72 are arranged in an installation space and are positioned between the first cylinder 12 and the secondary main body 11 and between the second cylinder 13 and the secondary main body 11; the first column 12 and the second column 13 are both electrically connected to the output rectifying device 20; insulating layers 16 are arranged between the primary winding 72 and the secondary main body 11 and between the iron core 71 and the primary winding 72. The secondary main part 11 of the transformer 10 of the above switching power supply structure is of an integral structure, a secondary main part 11 is shared by all installation spaces on the secondary main part 11, a first cylinder 12, a second cylinder 13 in each installation space, a transformer unit with a double output circuit is jointly formed between a center tap 14 and the secondary main part 11, the secondary main part 11 is used as a public output electrode of each transformer unit, the time required by an assembled product can be greatly reduced, and the utility model discloses a production of the switching power supply structure is simpler and faster, and the production cost is reduced simultaneously.

Referring to fig. 1 and 2, as a preferred embodiment of the present invention, the output rectifying device 20 includes a metal heat dissipating plate 21 and at least one output rectifying group 22 connected to the metal heat dissipating plate 21, the number of the output rectifying groups 22 is equal to the number of the installation spaces, the metal heat dissipating plate 21 is isolated from the secondary main body 11, the output rectifying group 22 includes a first output assembly 221 and a second output assembly 222, the first output assembly 221 is electrically connected to the first column 12, and the second output assembly 222 is electrically connected to the second column 13. The secondary side main body 11 is made of a conductive material, the secondary side main body 11 is electrically connected with a first output terminal 61, in one embodiment, the secondary side main body 11 is connected with the output terminal 61 through a shunt, in another embodiment, the secondary side main body 11 is directly connected with the output terminal 61, a hall sensor is arranged on the output terminal 62, the shunt and the hall sensor are used for detecting data of output current, the metal heat dissipation plate 21 is connected with a second output terminal 62, the current generated by the transformer 10 can be rectified through the output rectifying group 22, and then the current is converged by the metal heat dissipation plate 21 and then is output through the second output terminal 62.

Referring to fig. 2, as the preferred embodiment of the present invention, the inside first cooling chamber that is equipped with of metal heat dissipation plate 21, first cooling chamber is equipped with first inlet 211 and first liquid outlet 212 that are linked together with outside cooling fluid, and preferably, first cooling chamber is for locating the inside snakelike crooked pipeline of metal heat dissipation plate 21, improves the radiating efficiency, and the both ends of this pipeline are first inlet 211 and first liquid outlet 212 respectively. The heat generated by the output rectifying device 20 can exchange heat with an external cooling fluid through the metal heat dissipation plate 21, thereby promoting heat dissipation of the output rectifying device 20.

Referring to fig. 4, 5 and 8, as a preferred embodiment of the present invention, the installation space includes an installation counterbore 15 provided on the secondary main body 11 and matched with the iron core 71 and the primary winding 72, the first cylinder 12 is fixedly connected to the installation counterbore 15, a part or all of the first cylinder 12 is accommodated in the installation counterbore 15, the second cylinder 13 is fixedly connected to the center tap 14, and a part or all of the second cylinder 13 is accommodated in the installation counterbore 15. A coupling loop is formed among the first cylinder 12, the secondary side body 11 and the center tap 14, another coupling loop is formed among the second cylinder 13, the center tap 14 and the secondary side body 11, and current paths of the two coupling loops are respectively shown as dotted lines E-F and dotted lines G-H in fig. 3. The iron core 71 and the primary winding 72 are accommodated in the mounting counterbore 15 as a mounting space, and the structure of the switching power supply structure is simple and reasonable by combining the first cylinder 12, the second cylinder 13, the secondary main body 11 and the connecting structure between the center taps 14, and large current output can be realized.

It is further preferred, center tap 14 with vice limit main part 11 fixed connection and cover in installation counter bore 15's top, first dodge hole 141 has been seted up on center tap 14, the lower part fixed connection of first cylinder 12 is in on the installation counter bore 15, the upper portion of first cylinder 12 upwards passes first dodge hole 141, first dodge hole 141 is isolated with first cylinder 12, set up on vice limit main part 11 and run through the second of installation counter bore 15 dodges hole 111, the upper portion fixed connection of second cylinder 13 is in on center tap 14, the lower part of second cylinder 13 passes downwards second dodge hole 111, second dodge hole 111 is isolated with second cylinder 13. Wherein, center tap 14 and first output terminal 61 electric connection, first cylinder 12 is as a vice limit output, and second cylinder 13 is as another vice limit output, and these two vice limit outputs all converge to metal heating panel 21 on then export through second output terminal 62, go up the structure and be favorable to the production equipment, make the utility model discloses a switching power supply structure's production preparation is simpler and swift.

Referring to fig. 4, in some embodiments of the present invention, the first cylinder 12 and the second cylinder 13 are both half cylinders, the side planes of the first cylinder 12 and the second cylinder 13 are opposite to each other at intervals, and the mounting counter bore 15 forms an annular groove for accommodating the iron core 71 and the primary winding 72 outside the first cylinder 12 and the second cylinder 13. Preferably, the first cylinder 12 is detachably connected with the secondary main body 11, and the second cylinder 13 is detachably connected with the secondary main body 12, so that the first cylinder 12 and the second cylinder 13 do not need to be avoided when the counter bore 15 is machined and installed, and the machining and manufacturing of the counter bore 15 are facilitated.

Referring to fig. 3 and 4, as a preferred embodiment of the present invention, the second cylinders 13 in the installation spaces are electrically connected through the same center tap 14. The first cylinder 12, the second cylinder 13, the secondary side main body 11 and the center tap 14 in each installation space together form a transformer 10 unit with a double-output circuit, and the second cylinders 13 in each installation space are electrically connected through the same center tap 14, so that the transformer 10 units can be connected with one another, the output circuits of the transformer 10 units do not need to be separately converged, the assembly efficiency of the switching power supply structure is greatly improved, and the assembly cost is reduced.

Referring to fig. 4, in the switching power supply structure as described above, preferably, at least two mounting counterbores 15 are formed in the secondary main body 11, an outlet 112 for leading out an electric wire of the primary winding 72 is formed between adjacent mounting counterbores 15, and a third avoiding hole 142 corresponding to the outlet 112 is formed in the center tap 14, so that the primary winding 72 is conveniently mounted, and the electric wire is prevented from being dragged by an external force to affect the normal operation of the primary winding 72.

In the above switching power supply structure, the input rectifying device 30 and the inverter 40 are insulated from the outer side wall of the secondary main body 11, and an external ac circuit is electrically connected to the input rectifying device 30, the inverter 40, and the primary winding 72 in sequence, so as to stabilize the voltage input to the primary winding 72, thereby ensuring the stability of the output voltage and current of the switching power supply structure.

Referring to fig. 6 and 7, in the switching power supply structure as described above, preferably, a second cooling cavity is provided inside the secondary main body 11, and the second cooling cavity is provided with a second liquid inlet 116 and a second liquid outlet 117 communicated with external cooling fluid. The cooling fluid flows out of the second liquid outlet 117 after entering from the second liquid inlet 116, so that heat exchange can be performed on the secondary main body 11, a large amount of heat generated during the operation of the transformer 10 with the switching power supply structure is taken away, the temperature rise of the transformer 10 is not too high, and the load capacity reduction of the switching power supply structure is avoided.

As described above, preferably, the secondary main body 11 is a cuboid, the secondary main body 11 has a plurality of installation spaces distributed at intervals along a length direction of the secondary main body 11, the second cooling cavity includes a first cooling pipeline 113 and a second cooling pipeline 114 which are arranged on the secondary main body 11 and located at two sides of the installation spaces respectively, the first cooling pipeline 113 and the second cooling pipeline 114 are communicated with each other through a connecting channel 115, one of the first cooling pipeline 113 and the second cooling pipeline 114 is provided with a second liquid inlet, and the other is provided with a second liquid outlet. The second cooling cavity with the structure can increase the area of heat exchange with the secondary side main body 11, and improve the heat exchange efficiency. Moreover, the first cooling pipeline 113, the second cooling pipeline 114 and the connecting channel 115 can be integrally formed on the secondary main body 11, and the secondary main body 11 is of an integral structure, so that the conventional structure that the cooling paths of two separated transformer units are connected is avoided.

Referring to fig. 6 and 7, it is further preferable that the first cooling pipe 113 and the second cooling pipe 114 are both U-shaped, and the length direction of the first cooling pipe 113 and the second cooling pipe 114 is consistent with the length direction of the side wall of the secondary side body 11, so as to further increase the heat exchange area between the second cooling cavity and the secondary side body 11.

The above embodiments are merely preferred embodiments of the present invention, and the present invention may also have other embodiments, such as reasonable combinations of the technical solutions recorded in the embodiments. Equivalent modifications or substitutions may be made by those skilled in the art without departing from the spirit of the invention, and such equivalent modifications or substitutions are intended to be included within the scope of the claims set forth herein.

Claims (10)

1. A switching power supply structure comprising a transformer (10) and an output rectifying device (20),

the transformer (10) comprises a secondary side main body (11), and the secondary side main body (11) is isolated from the output rectifying device (20);

at least two mounting spaces arranged on the secondary side main body (11), wherein a first column body (12) connected with the secondary side main body (11) is arranged in each mounting space;

a center tap (14) connected to the secondary side body (11) and isolated from the first cylinder (12);

the second cylinder (13) is connected to the center tap (14) and is isolated from the secondary side main body (11);

the secondary side main body (11), the first column body (12) and the second column body (13) are all solid structures through which large current can pass, and all installation spaces share the secondary side main body (11) with an integrated structure;

the iron core (71) and the primary winding (72) are wound on the iron core (71), the iron core (71) and the primary winding (72) are arranged in the installation space and are positioned between the first cylinder (12) and the secondary main body (11) and between the second cylinder (13) and the secondary main body (11);

the first column body (12) and the second column body (13) are electrically connected with the output rectifying device (20);

and insulating layers (16) are arranged between the primary winding (72) and the secondary main body (11) and between the iron core (71) and the primary winding (72).

2. A switching power supply arrangement according to claim 1, characterized in that:

the output rectifying device (20) comprises a metal heat dissipation plate (21) and at least one group of output rectifying groups (22) connected to the metal heat dissipation plate (21), the number of the output rectifying groups (22) is consistent with that of the installation spaces, the metal heat dissipation plate (21) is isolated from the secondary side main body (11), each output rectifying group (22) comprises a first output assembly (221) and a second output assembly (222), the first output assembly (221) is electrically connected with the first cylinder (12), and the second output assembly (222) is electrically connected with the second cylinder (13).

3. A switching power supply arrangement according to claim 2, characterized in that:

the metal heat dissipation plate (21) is internally provided with a first cooling cavity, and the first cooling cavity is provided with a first liquid inlet (211) and a first liquid outlet (212) which are communicated with external cooling fluid.

4. A switching power supply arrangement according to claim 1, characterized in that:

the mounting space comprises a mounting counter bore (15) which is formed in the secondary main body (11) and matched with the iron core (71) and the primary winding (72), the first cylinder (12) is fixedly connected to the mounting counter bore (15), part or all of the first cylinder (12) is accommodated in the mounting counter bore (15), the second cylinder (13) is fixedly connected to the center tap (14), and part or all of the second cylinder (13) is accommodated in the mounting counter bore (15).

5. A switching power supply arrangement according to claim 4, characterized in that:

center tap (14) and vice limit main part (11) fixed connection and cover in the top of installation counter bore (15), first dodge hole (141) has been seted up on center tap (14), the lower part fixed connection of first cylinder (12) is in on installation counter bore (15), the upper portion of first cylinder (12) upwards passes first dodge hole (141), first dodge hole (141) is isolated with first cylinder (12), seted up on vice limit main part (11) and run through the second of installation counter bore (15) dodges hole (111), the upper portion fixed connection of second cylinder (13) is in on center tap (14), the lower part of second cylinder (13) passes downwards hole (111) is dodged to the second, hole (111) is dodged to the second is isolated with second cylinder (13).

6. A switching power supply arrangement according to claim 5, characterized in that:

the iron core is characterized in that the first cylinder (12) and the second cylinder (13) are both semi-cylinders, the side planes of the first cylinder (12) and the second cylinder (13) are opposite at intervals, and the mounting counter bores (15) are formed outside the first cylinder (12) and the second cylinder (13) to form annular grooves for accommodating the iron core (71) and the primary winding (72).

7. A switching power supply arrangement according to claim 1, 4 or 5, characterized in that:

the second cylinders (13) in each mounting space are electrically connected through the same center tap (14).

8. A switching power supply arrangement according to claim 1, characterized in that:

an input rectifying device (30) and an inverter (40) are arranged on the outer side wall of the secondary side main body (11) in an insulating mode, and an external alternating current circuit is electrically connected with the input rectifying device (30), the inverter (40) and the primary winding (72) in sequence.

9. A switching power supply arrangement according to claim 1 or 4 or 5 or 8, characterized in that:

and a second cooling cavity is arranged in the secondary side main body (11), and is provided with a second liquid inlet (116) and a second liquid outlet (117) communicated with external cooling fluid.

10. A switching power supply arrangement according to claim 9, characterized in that:

vice limit main part (11) are the cuboid form, vice limit main part (11) have a plurality ofly along its length direction interval distribution installation space, second cooling chamber is including locating on vice limit main part (11) and being located first cooling pipeline (113) and second cooling pipeline (114) of installation space both sides respectively, be linked together through a connecting channel (115) between first cooling pipeline (113) and second cooling pipeline (114), be equipped with second inlet (116) on first cooling pipeline (113) and second cooling pipeline (114) one of them, be equipped with second liquid outlet (117) on the other.

Images