Transformer assembly and power supply having the same

Abstract

The utility model discloses a transformer subassembly and power supply with the transformer subassembly, including framework, magnetic core, first winding, second winding, third winding, first PCB board and second PCB board, first PCB board sets up in the bottom of framework, and second PCB board sets up in the side of framework, the first winding's head, tail end is electrically connected on first PCB board respectively, and second winding and third winding pass the inner ring side of first winding along the axial direction, be provided with two groups of synchronous rectification circuit, two pins on second PCB board, one end of second winding is inserted in second PCB board to be connected in a pin through a group of synchronous rectification circuit, one end of third winding is inserted in second PCB board to be connected in another pin through another group of synchronous rectification circuit, and another end of second winding and third winding is downward through first PCB board through an extension support leg, and thus, effectively reduce the welding impedance, improve overcurrent, improve the efficiency, and modular component setting, easy to install application.

Description

Technical Field

[0001] This utility model relates to the field of power transformers, and in particular to a transformer assembly and a power supply having the transformer assembly. Background Technology

[0002] In power supply products, such as power supplies or power adapters, transformers are required. Considering factors such as installation space, it is common practice to insert the transformer onto a small PCB board, and then mount the components onto the main PCB board.

[0003] Taking CN 221551665U as an example, it discloses a transformer structure, which includes a transformer body, a PCB main board, a vertical PCB board, and a sheath. The sheath includes a sheath body and a fixing component disposed on one side of the sheath body. The sheath body is mounted on the PCB main board. The transformer body is mounted inside the sheath body, and the vertical PCB board is mounted inside the fixing component to limit the safety distance between the transformer body and the vertical PCB board. The transformer structure also includes a fixing member, one end of which is connected to the sheath body, and the other end of which is mounted on the PCB main board. The transformer body includes a magnetic core, which serves as a primary device connected to the PCB main board. The vertical PCB board is the output board, serving as a secondary device of the transformer.

[0004] It is evident that the existing transformer designs are structurally complex, inconvenient to install and apply, and prone to deformation during soldering, resulting in additional impedance. Furthermore, although other existing technologies employ synchronous rectification circuits on power transformers, these circuits are connected to the main PCB board via two pins on a vertical PCB board, which is insufficient to meet higher requirements for overcurrent capacity.

[0005] Therefore, a new technical solution needs to be researched to address the above problems. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a transformer assembly and a power supply having the transformer assembly, which effectively reduces welding resistance, improves overcurrent, enhances efficiency, and features a modular component design that is easy to install and apply.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A transformer assembly includes: a frame, a magnetic core, a first winding, a second winding, a third winding, a first PCB board, and a second PCB board;

[0009] The magnetic core passes through the interior of the skeleton along the axial direction, and the first winding is arranged around the magnetic core on the skeleton; the first PCB board is arranged at the bottom of the skeleton and perpendicular to the axial direction of the skeleton, and the second PCB board is arranged on the side of the skeleton and parallel to the axial direction of the skeleton.

[0010] The first and third windings are electrically connected to the first PCB board, respectively. The second and third windings pass through the inner ring side of the first winding along the axial direction. Two sets of synchronous rectification circuits are provided on the second PCB board, and two pins extend from the lower end of the second PCB board. One end of the second winding is inserted into the second PCB board and connected to a pin through a set of synchronous rectification circuits. One end of the third winding is inserted into the second PCB board and connected to another pin through another set of synchronous rectification circuits. The other ends of the second and third windings pass downward through the first PCB board through an extension pin.

[0011] As a preferred embodiment, one end of the second winding and one end of the third winding are both configured as laterally extending inserts, which are inserted into the corresponding holes of the second PCB board to form mechanical fixation and electrical connection.

[0012] As a preferred option, the lower end of the extension leg is flush with the lower ends of the two prongs.

[0013] As a preferred embodiment, the synchronous rectifier circuit includes a synchronous rectifier tube. One end of the second winding and one end of the third winding are connected to the source (S) of the corresponding synchronous rectifier tube. The drain (D) of the synchronous rectifier tube is grounded, and the gate (G) of the synchronous rectifier tube is connected to the corresponding pin.

[0014] As a preferred embodiment, the frame includes an integrally injection-molded top plate, a cylindrical body, and a bottom plate. The cylindrical body is connected between the top plate and the bottom plate. One side of the top plate and the bottom plate has a clearance notch facing the second PCB board. One end of the second winding extends out from the clearance notch of the top plate, and the extension leg passes through the clearance notch of the bottom plate.

[0015] As a preferred embodiment, the first PCB board is bonded and fixed to the bottom of the base plate;

[0016] And / or:

[0017] The first PCB board is glued and fixed to the bottom of the E-shaped magnetic core below.

[0018] As a preferred option, the pins, inserts, and extension legs are all flat with rectangular cross-sections, and corresponding rectangular holes are pre-drilled on the first PCB board and the second PCB board.

[0019] As a preferred option, synchronous rectifier circuits typically include several synchronous rectifier diodes connected in parallel.

[0020] As a preferred option, synchronous rectifier circuits also include resistors and capacitors.

[0021] A power supply includes a power supply motherboard and a transformer mounted on the power supply motherboard, wherein the transformer is a transformer assembly as described in any of the preceding claims, and an extension leg and two pins are respectively plugged into the power supply motherboard.

[0022] Compared with the prior art, this utility model has significant advantages and beneficial effects. Specifically, as can be seen from the above technical solution, it mainly involves configuring the transformer assembly to include a frame, a magnetic core, a first winding, a second winding, a third winding, a first PCB board, and a second PCB board. The first PCB board is located at the bottom of the frame and perpendicular to the axial direction of the frame, while the second PCB board is located beside the frame and parallel to the axial direction of the frame. The second PCB board is provided with two sets of synchronous rectification circuits and two pins. One end of the second winding is electrically connected to the second PCB board and connected to a pin via a set of synchronous rectification circuits. One end of the third winding is electrically connected to the second PCB board and connected to another pin via another set of synchronous rectification circuits. The other ends of the second and third windings pass downward through the first PCB board via an extension leg. Thus, it effectively reduces welding resistance, improves overcurrent, enhances efficiency, and the modular component design facilitates the installation and application of the transformer assembly on the power supply motherboard.

[0023] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0024] Figure 1 This is a perspective view of a transformer assembly according to an embodiment of the present utility model;

[0025] Figure 2 This is a side view of a transformer assembly according to an embodiment of the present invention;

[0026] Figure 3 This is an exploded view of a transformer assembly according to an embodiment of the present invention;

[0027] Figure 4 This is a cross-sectional view of a transformer assembly according to an embodiment of the present invention;

[0028] Figure 5 This is a circuit connection diagram of a transformer assembly according to an embodiment of the present invention. Detailed Implementation

[0029] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of an embodiment of the present invention.

[0030] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] A transformer assembly includes: a bobbin 10', a magnetic core 20, a first winding N1, a second winding N2, a third winding N3, a first PCB board 30, and a second PCB board 40;

[0032] The magnetic core 20 passes through the interior of the frame 10' along the axial direction, and the first winding N1 is arranged around the magnetic core 20 on the frame 10'; the first PCB board 30 is arranged at the bottom of the frame 10' and perpendicular to the axial direction of the frame 10', and the second PCB board 40 is arranged on the side of the frame 10' and parallel to the axial direction of the frame 10'.

[0033] The first winding N1 has its beginning and end electrically connected downwards to two terminals on the first PCB board 30. The second winding N2 and the third winding N3 pass axially through the inner ring side of the first winding N1. Two sets of synchronous rectifier circuits are provided on the second PCB board 40, and two pins 41 extend from the lower end of the second PCB board 40. One end of the second winding N2 is inserted outwards into the second PCB board 40 to be connected to one pin 41 via one set of synchronous rectifier circuits. One end of the third winding N3 is inserted outwards into the second PCB board 40 to be connected to another pin 41 via another set of synchronous rectifier circuits. The other ends of the second winding N2 and the third winding N3 pass downwards through the first PCB board 30 via an extension leg 50. One end of the second winding N2 and one end of the third winding N3 are both configured as laterally extending inserts P, which are inserted into corresponding holes on the second PCB board 40 to form a mechanical fixation and electrical connection. The lower end of the extension leg 50 is flush with the lower ends of the two pins 41. Pin 41, insert P, and extension pin 50 are all flat with rectangular cross-sections. Correspondingly, matching rectangular holes are reserved on the first PCB board 30 and the second PCB board 40. After insertion, deformation is not easily caused during soldering, thus avoiding additional impedance.

[0034] The frame 10' includes an integrally injection-molded top plate 11, a cylindrical body 12, and a bottom plate 13. The cylindrical body is connected between the top plate and the bottom plate. A clearance notch 101 is reserved on one side of the top plate and the bottom plate facing the second PCB board 40. One end of the second winding N2 extends from the clearance notch 101 in the top plate, and the extension leg 50 passes through the clearance notch in the bottom plate. The magnetic core 20 includes two E-type magnetic cores 21 that are spliced ​​together vertically. Positioning grooves 102 are reserved on the upper side of the top plate and the lower side of the bottom plate, and the two E-type magnetic cores 21 are respectively installed in the corresponding positioning grooves. Typically, through holes are provided on the top plate and the bottom plate to penetrate the interior of the cylindrical body, facilitating the passage of the central column of the E-type magnetic core 21. The first PCB board 30 is bonded and fixed to the bottom of the bottom plate; and / or: the first PCB board 30 is bonded and fixed to the bottom of the lower E-type magnetic core 21.

[0035] Synchronous rectifier circuits all include synchronous rectifier diodes. One end of the second winding N2 and one end of the third winding N3 are connected to the source (S) terminal of the corresponding synchronous rectifier diode. The drain (D) terminal of the synchronous rectifier diode is grounded, and the gate (G) terminal is connected to the corresponding pin 41. Synchronous rectifier circuits all include several synchronous rectifier diodes connected in parallel, and also include resistors and capacitors. For example, one set of synchronous rectifier circuits includes synchronous rectifier diodes Q24A, Q24B, Q24C, and Q24D. Resistors R14 and R15 are connected in parallel, with one end connected to the source (S) terminal of the synchronous rectifier diodes and the other end connected to one end of capacitor C85. The other end of capacitor C85 is grounded. At the end of the synchronous rectifier circuit, resistor R74 is connected to the gate (G) terminal of synchronous rectifier diode Q24D, with the other end of resistor R74 grounded. Another set of synchronous rectifier circuits has the same or basically the same circuit structure, and will not be described further. Through the design of synchronous rectifier circuits, efficiency is effectively improved, power consumption is reduced, and current regulation and response performance are better.

[0036] Furthermore, a power supply is provided, comprising a power supply motherboard and a transformer mounted on the power supply motherboard, wherein the transformer is a transformer assembly as described in any of the preceding claims, with an extension leg 50 and two pins 41 respectively plugged into the power supply motherboard. For the transformer assembly, it forms three triangularly arranged plug points with the power supply motherboard, relying not only on the two pins 41 of the second PCB board 40 for more stable and reliable positioning. Moreover, the extension leg 50 passes through a rectangular through-hole on the first PCB board 30, and the extension bracket matches and positions itself with the rectangular through-hole. The extension bracket enhances the relative stability of the transformer body (i.e., frame 10', magnetic core 20, first winding N1, first PCB board 30) and the adjacent vertical PCB board (i.e., second PCB board 40), improving the reliability of the transformer assembly mounted on the power supply motherboard.

[0037] The key design feature of this invention lies in its transformer assembly, which comprises a frame 10', a magnetic core 20, a first winding N1, a second winding N2, a third winding N3, a first PCB board 30, and a second PCB board 40. The first PCB board 30 is located at the bottom of the frame 10' and perpendicular to its axial direction. The second PCB board 40 is located beside the frame 10' and parallel to its axial direction. The second PCB board 40 has two sets of synchronous rectification circuits and two pins 41. One end of the second winding N2 is electrically connected to the second PCB board 40 and connected to one pin 41 via one set of synchronous rectification circuits. One end of the third winding N3 is electrically connected to the second PCB board 40 and connected to another pin 41 via another set of synchronous rectification circuits. The other ends of the second winding N2 and the third winding N3 pass downward through the first PCB board 30 via an extension leg 50. This design effectively reduces soldering resistance, improves overcurrent, and enhances efficiency. Furthermore, the modular component design facilitates the installation and application of the transformer assembly on the power supply motherboard.

[0038] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A transformer assembly, characterized in that, It includes: a frame, a magnetic core, a first winding, a second winding, a third winding, a first PCB board, and a second PCB board; The magnetic core passes through the interior of the skeleton along the axial direction, and the first winding is arranged around the magnetic core on the skeleton; the first PCB board is arranged at the bottom of the skeleton and perpendicular to the axial direction of the skeleton, and the second PCB board is arranged on the side of the skeleton and parallel to the axial direction of the skeleton. The first and third windings are electrically connected to the first PCB board, respectively. The second and third windings pass through the inner ring side of the first winding along the axial direction. Two sets of synchronous rectification circuits are provided on the second PCB board, and two pins extend from the lower end of the second PCB board. One end of the second winding is inserted into the second PCB board and connected to a pin through a set of synchronous rectification circuits. One end of the third winding is inserted into the second PCB board and connected to another pin through another set of synchronous rectification circuits. The other ends of the second and third windings pass downward through the first PCB board through an extension pin.

2. The transformer assembly according to claim 1, characterized in that, One end of the second winding and one end of the third winding are both configured as horizontally extending inserts. The inserts are inserted into the corresponding holes on the second PCB board to form mechanical fixation and electrical connection.

3. The transformer assembly according to claim 1, characterized in that, The lower end of the extended leg is flush with the lower ends of the two prongs.

4. The transformer assembly according to claim 1, characterized in that, Synchronous rectifier circuits all include synchronous rectifier tubes. One end of the second winding and one end of the third winding are connected to the source (S) of the corresponding synchronous rectifier tube. The drain (D) of the synchronous rectifier tube is grounded, and the gate (G) of the synchronous rectifier tube is connected to the corresponding pin.

5. The transformer assembly according to claim 1, characterized in that, The frame includes an integrally injection-molded top plate, a cylindrical body, and a bottom plate. The cylindrical body is connected between the top plate and the bottom plate. One side of the top plate and the bottom plate has a clearance notch facing the second PCB board. One end of the second winding extends out from the clearance notch of the top plate, and the extension leg passes through the clearance notch of the bottom plate.

6. The transformer assembly according to claim 5, characterized in that, The first PCB board is glued and fixed to the bottom of the base plate; And / or: The first PCB board is glued and fixed to the bottom of the E-shaped magnetic core below.

7. The transformer assembly according to claim 2, characterized in that, The pins, inserts, and extension legs are all flat with rectangular cross-sections, and corresponding rectangular holes are reserved on the first PCB board and the second PCB board.

8. The transformer assembly according to claim 4, characterized in that, Synchronous rectifier circuits all include several synchronous rectifier tubes connected in parallel.

9. The transformer assembly according to claim 4 or 8, characterized in that, Synchronous rectifier circuits also include resistors and capacitors.

10. A power supply, comprising a power supply motherboard and a transformer mounted on the power supply motherboard, characterized in that, The transformer is a transformer assembly as described in any one of claims 1 to 9, with the extended support and two plugs respectively plugged into the power supply motherboard.

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