Power supply, resonant transformer and electronic device

Abstract

The present application relates to a power supply, a resonant transformer and an electronic device. The power supply comprises: a magnetic core, a primary winding, a secondary winding, a circuit board and a first busbar, wherein the primary winding and the secondary winding are sleeved on the periphery of the magnetic core, and the primary winding and the secondary winding are arranged in the axial direction of the magnetic core; the circuit board is arranged at intervals in the axial direction of the magnetic core on one side thereof, and the plane of the circuit board is perpendicular to the axial direction of the magnetic core; the secondary winding comprises first pins and second pins, which are used for being electrically connected to the circuit board; the first pins are electrically connected to the circuit board by means of the first busbar; and at least part of the structure of the first busbar is located between the magnetic core and the circuit board in the axial direction of the magnetic core. By means of adjusting the size and area of a first busbar, the efficiency with which the first busbar transmits an induced current can be increased, and the structure of a conductor layer on a circuit board can also be simplified, and thus the current transmission efficiency can be improved while the cost of the circuit board is reduced, thereby increasing the output power of a power supply.

Description

A power supply, a resonant transformer, and electronic equipment

[0001] This application claims priority to Chinese Patent Application No. 202510257170.6, filed with the State Intellectual Property Office of China on February 28, 2025, entitled “A Power Supply, Resonant Transformer and Electronic Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of transformer technology, and more particularly to a power supply, a resonant transformer, and electronic equipment. Background Technology

[0003] The power supply of electronic devices is equipped with a resonant transformer, which can convert the input high voltage current into a stable low voltage current and output it to the electrical components, so that the electrical components can work normally under a stable low voltage.

[0004] A resonant transformer includes a magnetic core, a primary winding wound on the magnetic core, and a secondary winding. When the resonant transformer is working, a high-voltage current is input into the primary winding. As the magnitude of the current in the primary winding changes, a changing magnetic field is generated near the primary winding. In the changing magnetic field, an induced current is generated in the secondary winding. The secondary winding is electrically connected to the circuit board through pins, so that the induced current in the secondary winding is transmitted to the output terminal through the copper layer on the circuit board. Finally, the low-voltage induced current is transmitted to the electrical components through the output terminal.

[0005] In related technologies, the circuit board has poor efficiency in transmitting induced current, resulting in a large difference between the actual peak value and the theoretical peak value of the resonant transformer output current, which reduces the output power of the resonant transformer and the power supply.

[0006] Application content

[0007] In view of this, this application provides a power supply, a resonant transformer, and an electronic device that can improve the power of the resonant transformer and the power supply.

[0008] In a first aspect, this application provides a power supply, which includes a magnetic core, a primary winding, a secondary winding, a circuit board, and a first busbar. The primary winding and the secondary winding are sleeved around the magnetic core and are arranged along the axial direction of the magnetic core. The circuit board is arranged at intervals along the axial direction of the magnetic core on one side of the magnetic core, and the plane of the circuit board is perpendicular to the axial direction of the magnetic core. The secondary winding includes a first pin and a second pin, which are used for electrical connection with the circuit board. Both the first pin and the second pin extend radially away from the magnetic core. There are multiple first pins and multiple second pins. The multiple first pins and multiple second pins are arranged at intervals along the axial direction of the magnetic core, and each first pin corresponds to one second pin. The first pin is electrically connected to the circuit board via a first bus. At least a portion of the structure of the first bus is located between the magnetic core and the circuit board along the axial direction of the magnetic core. The first bus has a first bent section that extends from at least the portion of the first bus located between the magnetic core and the circuit board toward a direction away from the circuit board along the axial direction of the magnetic core. The first bent section is used for electrical connection with the first pin and is electrically insulated from the second pin.

[0009] In this application, a first bus is added between the secondary winding and the circuit board. By adjusting the size and area of ​​the first bus, the transmission efficiency of the induced current can be increased. This also simplifies the structure of the conductor layer on the circuit board, reducing circuit board costs while improving current transmission efficiency, thereby increasing the power supply's output power. Simultaneously, as current is transmitted through the first bus, its temperature rises. The larger size and area of ​​the first bus result in a larger contact area with the air, meaning higher heat dissipation efficiency. This improves the overall heat dissipation capacity of the power supply, thus enhancing its temperature reliability.

[0010] The first bus is bent to form a first bent section that is electrically connected to the first pin, reducing the difficulty of electrical connection between the first bus and the first pin. The bending of the first bus to form the first bent section also increases the area of ​​the first bus, further improving the heat dissipation efficiency of the first bus.

[0011] In some possible designs, the power supply also includes connecting plates arranged radially at intervals along one side of the magnetic core, with the plane of the connecting plates parallel to the axial direction of the magnetic core. Each first pin is electrically connected to a first bent section via the connecting plates, and each second pin is electrically insulated from the connecting plates.

[0012] In this application, the connection board is electrically connected between the first pin and the first bus, which simplifies the structure of the first bus and thus reduces the cost of the first bus.

[0013] In some possible designs, the connector plate includes multiple through holes, each penetrating the connector plate in a direction perpendicular to the plane of the connector plate, with each first pin passing through the connector plate from one through hole and each second pin passing through the connector plate from one through hole.

[0014] In this application, the first pin passes through the connecting plate via a through hole (denoted as the first through hole) and the second pin passes through the connecting plate via a through hole (denoted as the second through hole). This improves the connection stability between the secondary winding and the connecting plate, reduces the risk of electrical connection failure due to separation of the secondary winding and the connecting plate, and thus helps improve the operating stability of the power supply. The fact that the first pin passes through the first through hole and the second pin passes through the second through hole reduces the radial arrangement space of the connecting plate and the secondary winding in the magnetic core, thereby helping to reduce the radial size of the power supply in the magnetic core and facilitating miniaturization of the power supply design.

[0015] In some possible designs, the end of the first bend away from the circuit board extends radially away from the magnetic core, and the end of the first bend passes through a through hole in the connecting plate and is electrically connected to the connecting plate.

[0016] In this application, the end of the first bent section facing away from the circuit board is bent and extended radially away from the magnetic core to form a bent end. The bent end passes through the connecting plate through the third through hole, which improves the connection stability between the first bus and the connecting plate and reduces the risk of electrical connection failure due to separation of the first bus and the connecting plate, thereby improving the working stability of the power supply. The bent end passing through the connecting plate through the third through hole can reduce the radial arrangement space of the connecting plate and the secondary winding in the magnetic core, which is beneficial to the radial size of the power supply in the magnetic core and facilitates the miniaturization design of the power supply.

[0017] In some possible designs, the first bus has a second bend along the axial direction of the magnetic core, the second bend extending toward the circuit board from at least a portion of the first bus located between the magnetic core and the circuit board, the second bend being electrically connected to the circuit board.

[0018] In this application, a second bend is provided, which simplifies the connection between the first bus and the circuit board, thereby simplifying the structure of the first bus and the circuit board and reducing the cost of the power supply.

[0019] In some possible designs, the power supply also includes a second bus along the axial direction of the magnetic core, located on the same side of the circuit board as the magnetic core, and electrically connected between the second pin and the circuit board. A portion of the second bus structure extends axially along the magnetic core, while another portion extends circumferentially along the magnetic core.

[0020] In this application, a second bus is added between the secondary winding and the circuit board. By adjusting the size and area of ​​the second bus, the transmission efficiency of the induced current can be increased. This also simplifies the structure of the conductor layer on the circuit board, reducing circuit board costs while improving current transmission efficiency, thereby increasing the power supply's output power. Furthermore, since most of the current is transmitted through the second bus, its temperature rises during transmission. The larger size and area of ​​the second bus result in a larger contact area with the air, meaning higher heat dissipation efficiency, thus improving the power supply's heat dissipation capacity and enhancing its temperature reliability.

[0021] A portion of the second bus structure extends along the axial direction of the magnetic core to form a fifth bend. The fifth bend is electrically connected to the circuit board. In other words, a portion of the second bus structure extends along the axial direction of the magnetic core to simplify the electrical connection structure between the second bus and the circuit board.

[0022] Another part of the structure of the second bus extends circumferentially along the magnetic core, allowing the second bus to be bent into L-shape, V-shape, U-shape or other deformable structures, thereby further increasing the size and area of ​​the second bus and further improving the transmission efficiency and heat dissipation capacity of the second bus for induced current.

[0023] In some possible designs, the second busbar has a mounting plate whose planar direction is perpendicular to the radial direction of the magnetic core. The mounting plate has multiple mounting through holes, each of which penetrates the mounting plate radially through the magnetic core. Each first pin passes through one mounting through hole in the mounting plate radially through the magnetic core and serves as electrical insulation between the mounting through holes. Each second pin passes through one mounting through hole in the mounting plate radially through the magnetic core and is electrically connected to the mounting plate.

[0024] In this application, the fixed through holes are referred to as the first fixed through hole and the second fixed through hole, respectively. The first pin passes through the fixing plate from the first fixed through hole along the radial direction of the magnetic core, serving to form electrical insulation between the wall of the first fixed through hole and the first pin. The second pin passes through the fixing plate from the second fixed through hole along the radial direction of the magnetic core, and the second pin is electrically connected to the second bus at the second fixed through hole. Providing fixed through holes simplifies the electrical connection structure between the first pin and the connecting plate, and between the second pin and the second bus, thereby simplifying the structure of the second bus and reducing its cost.

[0025] In some possible designs, at least a portion of the structure of the fixing plate is located between the connecting plate and the magnetic core along the radial direction of the magnetic core.

[0026] In this application, at least a portion of the structure of the fixing plate is located between the connecting plate and the magnetic core, so as to reduce the overall size of the power supply and realize the miniaturization design of the power supply.

[0027] In some possible designs, there are multiple secondary windings arranged along the axial direction of the magnetic core. Each secondary winding has a first pin and a second pin. The extension direction of the second pin of each secondary winding forms an angle with the extension direction of the second pin of its adjacent secondary winding. There are two second buses, arranged sequentially along the circumference of the magnetic core and electrically connected. Each of the two second buses is electrically connected to the two second pins at the angle to each other.

[0028] In this application, the two second buses are referred to as the first bus sub-bus and the second bus sub-bus, respectively. The first bus sub-bus and the second bus sub-bus are arranged sequentially and fixedly connected along the circumference of the magnetic core, and the first bus sub-bus and the second bus sub-bus surround at least a portion of the magnetic core. The first bus sub-bus and the second bus sub-bus are electrically connected to two second pins that are at an angle to each other. For example, the first bus sub-bus and the second bus sub-bus are electrically connected to second pins located on both sides of the magnetic core. Setting the second buses as fixedly connected first bus sub-bus and second bus sub-bus facilitates the processing of the second buses, thereby reducing the processing difficulty of the second buses and reducing the processing cost of the second buses.

[0029] In some possible designs, one of the first busbar and the second busbar is provided with a third protrusion and the other is provided with a recess, at least a portion of the third protrusion being located in the recess, and the cooperation of the third protrusion and the recess is used to limit the relative positions of the first busbar and the second busbar.

[0030] In this application, during the installation of the first busbar and the second busbar, the cooperation of the third protrusion and the recess can improve the relative positional accuracy of the first busbar and the second busbar, thereby improving the connection accuracy and reliability of the first busbar and the second busbar.

[0031] In some possible designs, the power supply also includes a housing, in which the magnetic core, primary winding, and secondary winding are all mounted, and at least a portion of the structure of the second bus is located outside the housing, with a first gap in the radial direction of the magnetic core between the portion of the second bus located outside the housing and a portion of the housing structure.

[0032] In this application, a first gap is left between the second bus and the housing, thereby forming a first air duct. During power supply operation, air can flow through the first gap, thereby dissipating heat from the second bus and further improving its heat dissipation capacity. Gaps may also be left between other bends in the second bus and the housing to further enhance its heat dissipation capacity.

[0033] In some possible designs, the housing also includes a first protrusion that extends radially along the magnetic core and at least a portion of the structure of the first protrusion abuts between the magnetic core and the second busbar, the first protrusion being used to leave a first gap between the magnetic core and the second busbar.

[0034] In this application, the first protrusion can support the second bus, reducing the risk of the first gap being blocked due to the second bus being recessed toward the magnetic core, thereby improving the heat dissipation stability of the second bus.

[0035] In some possible designs, the first protrusion is provided with a limiting hole that passes through the protrusion along the axial direction of the magnetic core, and the second bus passes through the limiting hole along the axial direction of the magnetic core and is electrically connected to the circuit board.

[0036] In this application, the fifth bends on both the first and second busbars are inserted into the limiting holes along the axial direction of the magnetic core, and the fifth bends can abut against the wall portion forming the limiting hole. For example, the fifth bends can abut against the wall portion forming the limiting hole in a second direction. The limiting holes improve the accuracy of the installation position of the second busbar, thereby improving the accuracy of the relative position between the second busbar and the magnetic core, reducing the risk that the second busbar misalignment will prevent it from being electrically connected to the circuit board, and thus reducing the difficulty of connecting the second busbar to the circuit board.

[0037] In some possible designs, the power supply also includes a frame, with at least a portion of the frame structure along the axial direction of the core located on the side of the first bus away from the circuit board, and at least a portion of the frame along the radial direction of the core located between the second bus and the core. The frame has multiple support holes, each extending radially through the frame, with each first pin and each second pin passing through one support hole, each support hole serving to support its corresponding first pin or second pin.

[0038] In this application, the support holes are referred to as the first support hole and the second support hole, respectively. The first pin passes through the frame through the first support hole and is electrically connected to the first busbar, and the second pin passes through the frame through the second support hole and is electrically connected to the second busbar. When the first pin and the second pin are subjected to force and tend to deform along the axial direction of the magnetic core, the frame can support the first pin and the second pin, thereby reducing the risk of the first pin and the second pin deforming along the axial direction of the magnetic core and failing to connect with the busbar and the circuit board, thus improving the stability and reliability of the electrical connection between the secondary winding and the busbar.

[0039] In some possible designs, a portion of the structure of the second busbar along the radial direction of the magnetic core is located between the connecting plate and the magnetic core, and a second gap is left between the portion of the structure of the second busbar along the radial direction of the magnetic core and the connecting plate.

[0040] In this application, a second gap is left between the fixing plate and the connecting plate to form a second air duct, thereby further improving the heat dissipation capacity of the second busbar.

[0041] In some possible designs, the frame has a second protrusion that extends radially along the magnetic core and at least a portion of the structure of the second protrusion abuts between the connecting plate and the frame, the second protrusion being used to leave a second gap between the connecting plate and the second busbar.

[0042] In this application, the distance between the connecting plate and the second busbar is increased by the second protrusion, thereby forming a second gap between the connecting plate and the fixing plate of the second busbar. During the operation of the power supply, air can flow through the second gap, thereby achieving heat dissipation for the second busbar and the connecting plate, and further improving the heat dissipation capacity of the power supply.

[0043] In some possible designs, the second protrusion is located on one or both sides of the second busbar along the axial direction of the magnetic core.

[0044] In this application, the frame is provided with a second protrusion extending along a first direction. The second protrusion is located between the fixing plate and the circuit board along the axial direction of the magnetic core, and / or, the fixing plate is located between the second protrusion and the circuit board along the axial direction of the magnetic core. That is, the second protrusion can be located on one or both sides of the fixing plate along the axial direction of the magnetic core. The second protrusion is the aforementioned second protrusion. By providing the second protrusion on the outer side of the fixing plate, and ensuring a second gap between the fixing plate and the connecting plate, the structure of the fixing plate can be simplified.

[0045] In some possible designs, the second protrusion surrounds part of the support hole, and the second protrusion is made of insulating material.

[0046] In this application, the frame is provided with a first protrusion extending along a first direction and surrounding the periphery of the first support hole. The first protrusion is made of insulating material and is the aforementioned second protrusion. The first protrusion surrounding the periphery of the first support hole can simultaneously support the first pin and the connecting plate. While ensuring a second gap between the connecting plate and the second busbar, it can increase the size for supporting the first pin, thereby improving the frame's support effect on the first pin.

[0047] In some possible designs, the second busbar has a first fixed through hole that extends radially through the second busbar along the magnetic core, and a second protrusion that extends radially through the first fixed through hole and is used to abut against the connecting plate.

[0048] In this application, the first protrusion passes through the first fixing through hole, which helps to reduce the overall size of the second bus and the frame in the first direction, and also helps to further simplify the structure of the second bus. At the same time, the first protrusion passes through the first fixing through hole, and the first protrusion is made of insulating material, so that the first pin and the second bus are electrically insulated through the first protrusion. That is, the wall portion used to form the first fixing through hole can contact the first protrusion, so as to reduce the size of the first fixing through hole and improve the structural strength of the fixing plate.

[0049] Secondly, this application provides a resonant transformer, which includes a magnetic core, a primary winding, a secondary winding, and a first bus. The primary and secondary windings are sleeved around the magnetic core and arranged along the axial direction of the magnetic core. The secondary winding includes a first pin and a second pin, both extending radially away from the magnetic core. There are multiple first pins and multiple second pins, which are spaced apart along the axial direction of the magnetic core, with each first pin corresponding to one second pin. The first bus is used for electrical connection to the first pin. At least a portion of the structure of the first bus is arranged axially with the magnetic core. The first bus has a first bent section extending along the axial direction of the magnetic core towards the magnetic core. The first bent section is used for electrical connection to the first pin and is electrically insulated from the second pin.

[0050] In this application, a first bus is added between the secondary winding and the circuit board. By adjusting the size and area of ​​the first bus, the transmission efficiency of the induced current can be increased. This also simplifies the structure of the conductor layer on the circuit board, reducing circuit board costs while improving current transmission efficiency, thereby increasing the output power of the resonant transformer. Furthermore, as current is transmitted through the first bus, its temperature rises. The larger size and area of ​​the first bus result in a larger contact area with the air, meaning higher heat dissipation efficiency. This improves the overall heat dissipation capacity of the resonant transformer, thus enhancing its temperature reliability.

[0051] The first bus is bent to form a first bent section that is electrically connected to the first pin, reducing the difficulty of electrical connection between the first bus and the first pin. The bending of the first bus to form the first bent section also increases the area of ​​the first bus, further improving the heat dissipation efficiency of the first bus.

[0052] In some possible designs, the resonant transformer also includes connecting plates that are arranged radially at intervals on one side of the magnetic core, with the plane of the connecting plates parallel to the axial direction of the magnetic core. Each first pin is electrically connected to the first bent section through the connecting plate, and each second pin is electrically insulated from the connecting plate.

[0053] In this application, the connection board is electrically connected between the first pin and the first bus, which simplifies the structure of the first bus and thus reduces the cost of the first bus.

[0054] In some possible designs, the connector plate includes multiple through holes, each penetrating the connector plate in a direction perpendicular to the plane of the connector plate, with each first pin passing through the connector plate from one through hole and each second pin passing through the connector plate from one through hole.

[0055] In this application, the first pin passes through the connecting plate via a through hole (denoted as the first through hole) and the second pin passes through the connecting plate via a through hole (denoted as the second through hole). This improves the connection stability between the secondary winding and the connecting plate, reduces the risk of electrical connection failure due to separation of the secondary winding and the connecting plate, and thus helps improve the operating stability of the resonant transformer. The fact that the first pin passes through the first through hole and the second pin passes through the second through hole reduces the radial arrangement space of the connecting plate and the secondary winding in the magnetic core, thereby reducing the radial size of the resonant transformer in the magnetic core and facilitating miniaturization of the resonant transformer design.

[0056] In some possible designs, the end of the first bend away from the circuit board extends radially away from the magnetic core, and the end of the first bend passes through a through hole in the connecting plate and is electrically connected to the connecting plate.

[0057] In this application, the end of the first bent section facing away from the circuit board is bent and extended radially away from the magnetic core to form a bent end. The bent end passes through the connecting plate through the third through hole, which improves the connection stability between the first busbar and the connecting plate and reduces the risk of electrical connection failure due to separation of the first busbar and the connecting plate, thereby improving the operating stability of the resonant transformer. The bent end passing through the connecting plate through the third through hole can reduce the radial arrangement space of the connecting plate and the secondary winding in the magnetic core, which is beneficial to the radial size of the resonant transformer in the magnetic core and facilitates the miniaturization design of the resonant transformer.

[0058] In some possible designs, the first bus has a second bend along the axial direction of the magnetic core, the second bend extending toward the circuit board from at least a portion of the first bus located between the magnetic core and the circuit board, the second bend being electrically connected to the circuit board.

[0059] In this application, a second bend is provided, which simplifies the connection between the first busbar and the circuit board, thereby simplifying the structure of the first busbar and the circuit board and reducing the cost of the resonant transformer.

[0060] In some possible designs, the resonant transformer also includes a second bus along the axial direction of the magnetic core, located on the same side of the circuit board as the magnetic core, and electrically connected between the second pin and the circuit board. A portion of the second bus structure extends axially along the magnetic core, while another portion extends circumferentially along the magnetic core.

[0061] In this application, a second bus is added between the secondary winding and the circuit board. By adjusting the size and area of ​​the second bus, the transmission efficiency of the induced current can be increased. This also simplifies the structure of the conductor layer on the circuit board, reducing circuit board costs while improving current transmission efficiency, thereby increasing the output power of the resonant transformer. Furthermore, since most of the current is transmitted through the second bus, its temperature rises during transmission. The larger size and area of ​​the second bus result in a larger contact area with the air, meaning higher heat dissipation efficiency. This improves the heat dissipation capacity of the resonant transformer, thus enhancing its temperature reliability.

[0062] A portion of the second bus structure extends along the axial direction of the magnetic core to form a fifth bend. The fifth bend is electrically connected to the circuit board. In other words, a portion of the second bus structure extends along the axial direction of the magnetic core to simplify the electrical connection structure between the second bus and the circuit board.

[0063] Another part of the structure of the second bus extends circumferentially along the magnetic core, allowing the second bus to be bent into L-shape, V-shape, U-shape or other deformable structures, thereby further increasing the size and area of ​​the second bus and further improving the transmission efficiency and heat dissipation capacity of the second bus for induced current.

[0064] In some possible designs, the second busbar has a mounting plate whose planar direction is perpendicular to the radial direction of the magnetic core. The mounting plate has multiple mounting through holes, each of which penetrates the mounting plate radially through the magnetic core. Each first pin passes through one mounting through hole in the mounting plate radially through the magnetic core and serves as electrical insulation between the mounting through holes. Each second pin passes through one mounting through hole in the mounting plate radially through the magnetic core and is electrically connected to the mounting plate.

[0065] In this application, the fixed through holes are referred to as the first fixed through hole and the second fixed through hole, respectively. The first pin passes through the fixing plate from the first fixed through hole along the radial direction of the magnetic core, serving to form electrical insulation between the wall of the first fixed through hole and the first pin. The second pin passes through the fixing plate from the second fixed through hole along the radial direction of the magnetic core, and the second pin is electrically connected to the second bus at the second fixed through hole. Providing fixed through holes simplifies the electrical connection structure between the first pin and the connecting plate, and between the second pin and the second bus, thereby simplifying the structure of the second bus and reducing its cost.

[0066] In some possible designs, at least a portion of the structure of the fixing plate is located between the connecting plate and the magnetic core along the radial direction of the magnetic core.

[0067] In this application, at least a portion of the structure of the fixing plate is located between the connecting plate and the magnetic core, so as to reduce the overall size of the resonant transformer and realize the miniaturization design of the resonant transformer.

[0068] In some possible designs, there are multiple secondary windings arranged along the axial direction of the magnetic core. Each secondary winding has a first pin and a second pin. The extension direction of the second pin of each secondary winding forms an angle with the extension direction of the second pin of its adjacent secondary winding. There are two second buses arranged sequentially along the circumference of the magnetic core and electrically connected. The two second buses are electrically connected to the two second pins that form an angle with each other.

[0069] In this application, the two second buses are referred to as the first bus sub-bus and the second bus sub-bus, respectively. The first bus sub-bus and the second bus sub-bus are arranged sequentially and fixedly connected along the circumference of the magnetic core, and the first bus sub-bus and the second bus sub-bus surround at least a portion of the magnetic core. The first bus sub-bus and the second bus sub-bus are electrically connected to two second pins that are at an angle to each other. For example, the first bus sub-bus and the second bus sub-bus are electrically connected to second pins located on both sides of the magnetic core. Setting the second buses as fixedly connected first bus sub-bus and second bus sub-bus facilitates the processing of the second buses, thereby reducing the processing difficulty of the second buses and reducing the processing cost of the second buses.

[0070] In some possible designs, one of the first busbar and the second busbar is provided with a third protrusion and the other is provided with a recess, at least a portion of the third protrusion being located in the recess, and the cooperation of the third protrusion and the recess is used to limit the relative positions of the first busbar and the second busbar.

[0071] In this application, during the installation of the first busbar and the second busbar, the cooperation of the third protrusion and the recess can improve the relative positional accuracy of the first busbar and the second busbar, thereby improving the connection accuracy and reliability of the first busbar and the second busbar.

[0072] In some possible designs, the power supply also includes a housing, in which the magnetic core, primary winding, and secondary winding are all mounted, and at least a portion of the structure of the second bus is located outside the housing, with a first gap in the radial direction of the magnetic core between the portion of the second bus located outside the housing and a portion of the housing structure.

[0073] In this application, a first gap is left between the second bus and the housing, thereby forming a first air duct. During the operation of the resonant transformer, air can flow through the first gap, thereby dissipating heat from the second bus and further improving its heat dissipation capacity. Gaps may also be left between other bends in the second bus and the housing to further enhance its heat dissipation capacity.

[0074] In some possible designs, the housing also includes a first protrusion that extends radially along the magnetic core and at least a portion of the structure of the first protrusion abuts between the magnetic core and the second busbar, the first protrusion being used to leave a first gap between the magnetic core and the second busbar.

[0075] In this application, the first protrusion can support the second bus, reducing the risk of the first gap being blocked due to the second bus being recessed toward the magnetic core, thereby improving the heat dissipation stability of the second bus.

[0076] In some possible designs, the first protrusion is provided with a limiting hole that passes through the protrusion along the axial direction of the magnetic core, and the second bus passes through the limiting hole along the axial direction of the magnetic core and is electrically connected to the circuit board.

[0077] In this application, the fifth bends on both the first and second busbars are inserted into the limiting holes along the axial direction of the magnetic core, and the fifth bends can abut against the wall portion forming the limiting hole. For example, the fifth bends can abut against the wall portion forming the limiting hole in a second direction. The limiting holes improve the accuracy of the installation position of the second busbar, thereby improving the accuracy of the relative position between the second busbar and the magnetic core, reducing the risk that the second busbar misalignment will prevent it from being electrically connected to the circuit board, and thus reducing the difficulty of connecting the second busbar to the circuit board.

[0078] In some possible designs, the resonant transformer also includes a frame, with at least a portion of the frame along the axial direction of the core located on the same side of the first busbar as the core, and at least a portion of the frame along the radial direction of the core located between the second busbar and the core. The frame has multiple support holes, each extending radially through the frame, with each first pin and each second pin passing through one support hole, each support hole serving to support its corresponding first pin or second pin.

[0079] In this application, the support holes are referred to as the first support hole and the second support hole, respectively. The first pin passes through the frame through the first support hole and is electrically connected to the first busbar, and the second pin passes through the frame through the second support hole and is electrically connected to the second busbar. When the first pin and the second pin are subjected to force and tend to deform along the axial direction of the magnetic core, the frame can support the first pin and the second pin, thereby reducing the risk of the first pin and the second pin deforming along the axial direction of the magnetic core and failing to connect with the busbar and the circuit board, thus improving the stability and reliability of the electrical connection between the secondary winding and the busbar.

[0080] In some possible designs, a portion of the structure of the second busbar along the radial direction of the magnetic core is located between the connecting plate and the magnetic core, and a second gap is left between the portion of the structure of the second busbar along the radial direction of the magnetic core and the connecting plate.

[0081] In this application, a second gap is left between the fixing plate and the connecting plate to form a second air duct, thereby further improving the heat dissipation capacity of the second busbar.

[0082] In some possible designs, the frame has a second protrusion that extends radially along the magnetic core and at least a portion of the structure of the second protrusion abuts between the connecting plate and the frame, the second protrusion being used to leave a second gap between the connecting plate and the second busbar.

[0083] In this application, the distance between the connecting plate and the second busbar is increased by the second protrusion, thereby forming a second gap between the connecting plate and the fixing plate of the second busbar. During the operation of the resonant transformer, air can flow through the second gap, thereby achieving heat dissipation for the second busbar and the connecting plate, so as to further improve the heat dissipation capacity of the resonant transformer and the resonant transformer.

[0084] In some possible designs, the second protrusion is located on one or both sides of the second busbar along the axial direction of the magnetic core.

[0085] In this application, the frame is provided with a second protrusion extending along a first direction. The second protrusion is located between the fixing plate and the circuit board along the axial direction of the magnetic core, and / or, the fixing plate is located between the second protrusion and the circuit board along the axial direction of the magnetic core. That is, the second protrusion can be located on one or both sides of the fixing plate along the axial direction of the magnetic core. The second protrusion is the aforementioned second protrusion. By providing the second protrusion on the outer side of the fixing plate, and ensuring a second gap between the fixing plate and the connecting plate, the structure of the fixing plate can be simplified.

[0086] In some possible designs, the second protrusion surrounds part of the support hole, and the second protrusion is made of insulating material.

[0087] In this application, the frame is provided with a first protrusion extending along a first direction and surrounding the periphery of the first support hole. The first protrusion is made of insulating material and is the aforementioned second protrusion. The first protrusion surrounding the periphery of the first support hole can simultaneously support the first pin and the connecting plate. While ensuring a second gap between the connecting plate and the second busbar, it can increase the size for supporting the first pin, thereby improving the frame's support effect on the first pin.

[0088] In some possible designs, the second busbar has a first fixed through hole that extends radially through the second busbar along the magnetic core, and a second protrusion that extends radially through the first fixed through hole and is used to abut against the connecting plate.

[0089] In this application, the first protrusion passes through the first fixing through hole, which helps to reduce the overall size of the second bus and the frame in the first direction, and also helps to further simplify the structure of the second bus. At the same time, the first protrusion passes through the first fixing through hole, and the first protrusion is made of insulating material, so that the first pin and the second bus are electrically insulated through the first protrusion. That is, the wall portion used to form the first fixing through hole can contact the first protrusion, so as to reduce the size of the first fixing through hole and improve the structural strength of the fixing plate.

[0090] Thirdly, this application provides an electronic device, which includes a load and a power source, wherein the power source is electrically connected to the load, and the power source is any of the power sources described above.

[0091] In this application, a first bus is added between the secondary winding of the power supply and the circuit board. By adjusting the size and area of ​​the first bus, the transmission efficiency of the induced current can be increased. This also simplifies the structure of the conductor layer on the circuit board, reducing circuit board costs while improving current transmission efficiency, thereby increasing the power supply's output power and improving the operating efficiency of electronic devices. Furthermore, since most of the current is transmitted through the first bus, its temperature rises during transmission. The larger size and area of ​​the first bus result in a larger contact area with the air, meaning higher heat dissipation efficiency. This improves the overall heat dissipation capacity of the power supply, enhancing the temperature reliability of the power supply and electronic devices. Attached Figure Description

[0092] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0093] Figure 1 is a schematic diagram of the structure of the electronic device provided in this application in some embodiments;

[0094] Figure 2 is a schematic diagram of the structure of the electronic device provided in this application in some other embodiments;

[0095] Figure 3 is a partial structural schematic diagram of the power supply provided in this application in some embodiments;

[0096] Figure 4 is a schematic diagram of the working principle of the power supply in Figure 3 in some embodiments;

[0097] Figure 5 is a schematic diagram of current transmission between the resonant transformer and the load;

[0098] Figure 6 is a schematic diagram of the distribution of the secondary winding and the primary winding in some embodiments;

[0099] Figure 7 is a schematic diagram of the distribution of the secondary winding and the primary winding in some other embodiments;

[0100] Figure 8 is a schematic diagram of the distribution of the secondary winding and the primary winding in some other embodiments;

[0101] Figure 9 is a schematic diagram of the distribution of the secondary winding and the primary winding in some other embodiments;

[0102] Figure 10 is a schematic diagram of the current flow direction in the primary winding;

[0103] Figure 11 is a schematic diagram of the current flow direction in the secondary winding;

[0104] Figure 12 is a schematic diagram of the distribution of the secondary winding and the primary winding in some other embodiments;

[0105] Figure 13 is a schematic diagram of the distribution of the secondary winding and the primary winding in some other embodiments;

[0106] Figure 14 is a schematic diagram of the distribution of the secondary winding and the primary winding in some other embodiments;

[0107] Figure 15 is a cross-sectional view of the power supply provided in this application in some other embodiments;

[0108] Figure 16 is the circuit diagram of the resonant transformer in Figure 15;

[0109] Figure 17 is a schematic diagram of the secondary winding in some embodiments;

[0110] Figure 18 is a schematic diagram of the secondary winding in some other embodiments;

[0111] Figure 19 is a schematic diagram showing the distribution of the second pin and the first pin in some embodiments;

[0112] Figure 20 is a schematic diagram showing the distribution of the second pin and the first pin in some other embodiments;

[0113] Figure 21 is a schematic diagram of the A-side structure in the related technology;

[0114] Figure 22 is a schematic diagram of the connection structure of the power supply provided in this application in some embodiments;

[0115] Figure 23 is a cross-sectional view of the power supply provided in this application in some embodiments;

[0116] Figure 24 is a schematic diagram of the resonant transformer in Figure 23 in some embodiments;

[0117] Figure 25 is a structural schematic diagram of the first busbar in Figure 24 in some embodiments;

[0118] Figure 26 is a structural schematic diagram of the first busbar in Figure 24 in some other embodiments;

[0119] Figure 27 is a schematic diagram of the resonant transformer provided in this application in some other embodiments;

[0120] Figure 28 is a structural schematic diagram of the resonant transformer provided in this application in some other embodiments;

[0121] Figure 29 is a partial structural schematic diagram of Figure 28;

[0122] Figure 30 is a schematic diagram of the structure of the fixing plate of the busbar in Figure 29;

[0123] Figure 31 is a schematic diagram of the skeleton in Figure 29;

[0124] Figure 32 is a top view of the power supply provided in this application;

[0125] Figure 33 is a partial structural schematic diagram of the resonant transformer;

[0126] Figure 34 is a structural schematic diagram of Figure 28 from another perspective;

[0127] Figure 35 is a schematic diagram of the power supply provided in this application in some other embodiments;

[0128] Figure 36 is a schematic diagram of the structure of the first protrusion;

[0129] Figure 37 is a schematic diagram of the connection between the first protrusion and the second busbar.

[0130] Reference numerals: 1000 - Electronic device; 1100 - First device; 1200 - Second device; 100 - Load; 200 - Power supply; 210 - Circuit board; 210' - Circuit board; 220 - Output terminal; 1 - Resonant transformer; 1' - Resonant transformer; 11 - Housing; 111 - First protrusion; 111a - Limiting hole; 12 - Magnetic core; 13 - Primary winding; 14 - Secondary winding; 141 - First pin; 141' - First pin; 142 - Second pin; 142' - Second pin; 143 - First primary winding; 144 - Second secondary winding; 145 - Lead-out module; 15 - Frame; 151 - First support hole; 152 - Second support hole; 153 - First protrusion; 154 - Second protrusion; 16 - Side A; 16' - Side A; 17 - Side B; 2 - Busbar; 21-First busbar; 211-First bend section; 212-Bend end; 213-Second bend section; 214-Assembly hole; 22-Second busbar; 221-Fixing plate; 222-Third bend section; 223-Fourth bend section; 224-Fifth bend section; 225-First busbar; 225a-Third protrusion; 226-Second busbar; 226a-Recess; 227-First fixing through hole; 228-Second fixing through hole; 3-Rectifier; 4-Connecting plate; 41-First through hole; 42-Second through hole; 43-Third through hole; 5-First gap; 6-Second gap. Detailed Implementation

[0131] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0132] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0133] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0134] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0135] This application provides an electronic device. FIG1 is a schematic diagram of the structure of the electronic device 1000 in some embodiments. As shown in FIG1, the electronic device 1000 includes a load 100 and a power supply 200 electrically connected to the load 100.

[0136] In some embodiments, as shown in FIG1, the power supply 200 and the load 100 can be integrated within the same electronic device 1000, that is, the power supply 200 is the built-in power supply of the electronic device 1000. For example, the load 100 can be a mobile phone, computer, smart helmet, electric vehicle, server, base station, or other device. The power supply 200 can be the built-in power supply of the electronic device 1000, and the load 100 can be a power module inside the electronic device 1000. The power supply 200 supplies power to the load 100 to ensure the normal operation of the load 100.

[0137] Figure 2 is a schematic diagram of the electronic device 1000 in some other embodiments. As shown in Figure 2, in some other embodiments, the electronic device 1000 includes a first device 1100 and a second device 1200 that are separately configured. The load 100 is integrated into the first device 1100, and the power supply 200 is integrated into the second device 1200. That is, the power supply 200 is an external power supply for the first device 1100. A part of the second device 1200 can be inserted into the first device 1100, so that the power supply 200 is electrically connected to the load 100. The second device 1200 can also be pulled out from the first device 1100, so that the power supply 200 is de-energized from the load 100. For example, the first device 1100 can be a mobile phone, computer, smart helmet, electric vehicle, server, base station, etc., the load 100 can be the power module inside the first device 1100, and the second device 1200 can be a charger for mobile phones, computers, smart helmets, etc. The second device 1200 can also be a vehicle power supply, a data center power supply, a server power supply, and a base station power supply, etc. The embodiments of this application do not make any special limitations on the specific types and application scenarios of the electronic device 1000, the load 100, and the power supply 200.

[0138] For example, when the electronic device 1000 is a mobile phone, the load 100 is the battery inside the mobile phone, and the power supply 200 is the external charger of the mobile phone. At this time, the power supply 200 is used to convert the input high voltage current of 220V or 110V into a low voltage current of 5V and transmit it to the load 100 to charge the battery inside the mobile phone.

[0139] For example, when the electronic device 1000 is an X-ray machine, the load 100 is the X-ray tube inside the X-ray machine, and the power supply 200 is the high-voltage power supply of the X-ray machine. At this time, the power supply 200 is used to convert the input low-voltage current of 220V or 110V into a high-voltage current of tens of thousands of volts, and output the converted current to the X-ray tube to meet the normal operation of the X-ray machine.

[0140] The following explanations will use the example of power supply 200 converting the input high-voltage current into low-voltage current.

[0141] Figure 3 is a partial structural schematic diagram of the power supply 200. As shown in Figure 3, the power supply 200 includes a circuit board 210 and a resonant transformer 1. The circuit board 210 is provided with an output terminal 220. The resonant transformer 1 is electrically connected to the circuit board 210, that is, the resonant transformer 1 is electrically connected to the output terminal 220 through the conductor layer of the circuit board 210 (not shown in the figure). The output terminal 220 is electrically connected to the load 100. Specifically, a high-voltage current from the outside can be input into the resonant transformer 1. The resonant transformer 1 converts the high-voltage current into a low-voltage current and transmits it to the circuit board 210. The circuit board 210 distributes the low-voltage current, so that the electronic components on the circuit board 210 can work stably in a low-voltage environment. At the same time, the circuit board 210 transmits the low-voltage current to the load 100 through the output terminal 220 to meet the normal operation of the load 100. For example, an external 400V high-voltage current is input into the resonant transformer 1. The resonant transformer 1 converts the 400V high-voltage current into a 12V low-voltage current and transmits it to the circuit board 210. The circuit board 210 distributes the 12V low-voltage current so that the electronic components on the circuit board 210 can work stably in a 12V low-voltage environment. At the same time, the circuit board 210 transmits the 12V low-voltage current to the load 100 through the output terminal 220 to meet the normal operation of the load 100.

[0142] Figure 5 is a schematic diagram of the working principle of the resonant transformer 1. As shown in Figure 5, the resonant transformer 1 includes a magnetic core 12, a primary winding 13, and a secondary winding 14. Both the primary winding 13 and the secondary winding 14 are wound on the outside of the magnetic core 12, and are distributed along the axial direction Z of the magnetic core 12, as shown in Figure 4. When the resonant transformer 1 is working, a high-voltage current is input to the primary winding 13. The current value of the high-voltage current will fluctuate regularly over time. For example, the current value of the high-voltage current changes with time according to a sine function or a function close to a sine function. As the magnitude of the high-voltage current in the primary winding 13 changes, a changing magnetic field is generated near the primary winding 13. According to the principle of electromagnetic induction, an induced current will be generated in the secondary winding 14, which is also wound on the outside of the magnetic core 12, within the changing magnetic field.

[0143] Figure 5 is a schematic diagram of current transmission between resonant transformer 1 and load 100. As shown in Figure 5, the secondary winding 14 transmits the induced current to rectifier 3. Rectifier 3 rectifies the induced current and can output a stable low-voltage DC current. Finally, the stable low-voltage DC current is output to load 100 through output terminal 220.

[0144] The number of secondary windings 14 wound on the magnetic core 12 can be one or more.

[0145] In some embodiments, the primary winding 13 and the secondary winding 14 are distributed as shown in FIG6. There is one secondary winding 14. Along the axial direction Z of the magnetic core 12, the secondary winding 14 is located on one side of the primary winding 13. The first pin 141 and the second pin 142 of the secondary winding 14 extend in the first direction X and are used for electrical connection with the circuit board 210. The first pin 141 and the second pin 142 are collectively referred to as the pins of the secondary winding 14. That is, the first direction X is the extension direction of the pins of the secondary winding 14, and the first direction X is perpendicular to the axial direction of the magnetic core 12.

[0146] In some embodiments, the primary winding 13 and the secondary winding 14 are distributed as shown in FIG7. The number of secondary windings 14 is at least two, that is, the number of first pins 141 and second pins 142 are both multiple.

[0147] Along the axial direction Z of the magnetic core 12, multiple secondary windings 14 can be located on both sides of the primary winding 13, or on the same side of the primary winding 13.

[0148] Figure 7 illustrates two secondary windings 14 located on either side of the primary winding 13.

[0149] Figure 8 is a schematic diagram of the distribution of the primary winding 13 and the secondary winding 14 in another embodiment. Figure 8 illustrates that the two secondary windings 14 are located on the same side of the primary winding 13.

[0150] In some embodiments, along the axial direction Z of the magnetic core 12, the extension direction of the pin of each secondary winding 14 is the same as the extension direction of the pin of the adjacent secondary winding 14, or the extension direction of the pin of each secondary winding 14 and the extension direction of the pin of the adjacent secondary winding 14 are at an angle to each other, the angle being greater than 0° and less than or equal to 180°.

[0151] Figure 8 illustrates that the pins of two adjacent secondary windings 14 extend in the same direction.

[0152] Figure 9 is a schematic diagram of the distribution of the primary winding 13 and the secondary winding 14 in another embodiment. Figure 9 illustrates that the extension directions of the pins of two adjacent secondary windings 14 are at an angle of 180° to each other.

[0153] As shown in Figure 9, the two secondary windings 14 with opposite pin extension directions are denoted as the first secondary winding 143 and the second secondary winding 144, respectively. The extension direction of the pin of the first secondary winding 143 is the direction indicated by the arrow of the first direction X in Figure 9, and the extension direction of the pin of the second secondary winding 144 is the opposite direction to the arrow of the first direction X in Figure 9.

[0154] Figure 10 is a schematic diagram of the current flow direction in the primary winding 143. Taking the current in the primary winding 13 as exhibiting a sinusoidal fluctuation as an example, as the current in the primary winding 13 gradually increases from 0 to a positive peak and then gradually decreases back to 0, a first magnetic field that varies with the current is generated around the primary winding 13. The direction of the first magnetic field is denoted as the first magnetic field direction. Within the changing first magnetic field, as shown in Figure 10, a first current with a first flow direction is generated inside the primary winding 143. As the current in the primary winding 13 gradually decreases from 0 to a negative peak and then gradually increases back to 0, a second magnetic field that varies with the current is generated around the primary winding 13. The direction of the second magnetic field is denoted as the second magnetic field direction. The direction of the second magnetic field is opposite to that of the first magnetic field. Within the changing second magnetic field, as shown in Figure 10, a second current with a second flow direction is generated inside the primary winding 143.

[0155] For example, as shown in Figure 10, the first pin 141 of the first primary winding 143 is used as a negative pin and electrically connected to the positive port of the electronic component on the circuit board 210, and the second pin 142 of the first primary winding 143 is used as a positive pin and electrically connected to the negative port of the electronic component on the circuit board 210. When a first current with a first flow direction is generated in the first primary winding 143, the first current can be output to the electronic component through the second pin 142 of the first primary winding 143. When a second current with a second flow direction is generated in the first primary winding 143, the positive and negative connection method between the first primary winding 143 and the electronic component causes the second current to be unable to be transmitted to the electronic component. If only the first primary winding 143 capable of outputting the first current is provided, the output power of the resonant transformer 1 will be reduced.

[0156] Therefore, in this embodiment, referring again to FIG9, a second-stage winding 144 is provided with the pin extension direction opposite to that of the first-stage winding 143, that is, the pins of the first-stage winding 143 and the pins of the second-stage winding 144 are respectively located on both sides of the magnetic core 12 in the first direction X.

[0157] Figure 11 is a schematic diagram of the current flow within the secondary winding 144. As the current in the primary winding 13 gradually increases from 0 to a positive peak value and then gradually decreases back to 0, a first magnetic field that varies with the current is generated around the primary winding 13. Within this varying first magnetic field, as shown in Figure 11, a first current with a first flow direction is generated inside the secondary winding 144. Conversely, as the current in the primary winding 13 gradually decreases from 0 to a negative peak value and then gradually increases back to 0, a second magnetic field that varies with the current is generated around the primary winding 13. Within this varying second magnetic field, as shown in Figure 11, a second current with a second flow direction is generated inside the secondary winding 144.

[0158] For example, the first pin 141 of the second-stage winding 144 is used as a negative pin and electrically connected to the positive port of the electronic component on the circuit board 210, and the second pin 142 of the second-stage winding 144 is used as a positive pin and electrically connected to the negative port of the electronic component on the circuit board 210. When a first current with a first flow direction is generated in the second-stage winding 144, the positive and negative connection of the second-stage winding 144 to the electronic component prevents the first current from being transmitted to the electronic component. When a second current with a second flow direction is generated in the first-stage winding 143, the second current can be output to the electronic component through the second pin 142 of the second-stage winding 144.

[0159] Referring to Figures 10 and 11, as the current in the primary winding 13 gradually increases from 0 to a positive peak value and then gradually decreases back to 0, a first magnetic field that varies with the current is generated around the primary winding 13. Within this varying first magnetic field, a first current with a first flow direction is generated in both the primary winding 143 and the secondary winding 144, and this first current can be transmitted to the electronic components via the primary winding 143. Conversely, as the current in the primary winding 13 gradually decreases from 0 to a negative peak value and then gradually increases back to 0, a second magnetic field that varies with the current is generated around the primary winding 13. Within this varying second magnetic field, a second current with a second flow direction is generated in both the primary winding 143 and the secondary winding 144, and this second current can be transmitted to the electronic components via the secondary winding 144. In summary, the primary winding 143 can transmit the first current to the electronic components, and the secondary winding 144 can transmit the second current to the electronic components, thereby improving the output power of the resonant transformer 1 and consequently increasing the power of the power supply 200.

[0160] The primary winding 143 and the secondary winding 144 can be located on the same side of the same primary winding 13, or they can be located on opposite sides of the same primary winding 13.

[0161] For example, as shown in Figure 9, the primary winding 143 and the secondary winding 144 can be located on both sides of the same primary winding 13 along the axial direction Z of the magnetic core 12.

[0162] Figure 12 is a schematic diagram showing the distribution of the primary winding 13 and the secondary winding 14 in another embodiment. In some embodiments, exemplary as shown in Figure 12, the primary winding 143 and the secondary winding 144 may be located on the same side of the same primary winding 13 in the axial direction Z of the magnetic core 12. The primary winding 143 and the secondary winding 144 in Figure 12 are referred to as a lead-out module 145.

[0163] Figure 13 is a schematic diagram of the distribution of the primary winding 13 and the secondary winding 14 in another embodiment. As shown in Figure 13, on the axial Z of the magnetic core 12, a plurality of lead-out modules 145 can be provided on one side of the primary winding 13, that is, a plurality of primary windings 143 and secondary windings 144 are arranged alternately at intervals on one side of the primary winding 13. The adjacent secondary windings 14 are insulated from each other and from each other to the primary winding 13.

[0164] Figure 14 is a schematic diagram of the distribution of the primary winding 13 and the secondary winding 14 in another embodiment. As shown in Figure 14, on the axial direction Z of the magnetic core 12, lead-out modules 145 can be provided on both sides of the primary winding 13. In this embodiment, there are no special limitations on the number or distribution of the lead-out modules 145.

[0165] The number of primary windings 13 can be one or more.

[0166] Figure 15 is a schematic diagram of the distribution of the primary winding 13 and the secondary winding 14 in another embodiment. As shown in Figure 15, when there are multiple primary windings 13 distributed along the axial direction Z of the magnetic core 12, the number of lead-out modules 145 between adjacent primary windings 13 can be one or more. Figure 15 illustrates that the number of primary windings 13 is 3, the number of lead-out modules 145 is 4, and the primary windings 13 and lead-out modules 145 are arranged alternately along the axial direction Z of the magnetic core 12. The magnetic core 12, the primary winding 13 and the secondary winding 14 are all installed in the housing 11. Along the first direction X, the two sides of the magnetic core 12 are respectively labeled as side A 16 and side B 17, that is, both side A 16 and side B 17 of the magnetic core 12 have pins exposed on the outside of the housing 11.

[0167] Figure 16 is a circuit diagram of the resonant transformer 1 shown in Figure 15. As shown in Figure 16, when multiple secondary windings 14 are provided, adjacent secondary windings 14 are connected in parallel and then in series to the rectifier 3. Multiple parallel secondary windings 14 can increase the total current input to the rectifier 3, thereby improving the output power of the resonant transformer 1.

[0168] For example, the secondary winding 14 can be a sheet structure made of metal or a winding structure made of wire.

[0169] Figure 17 is a schematic diagram of the secondary winding 14 in some embodiments. As shown in Figure 17, the secondary winding 14 is wound with wires, and the two ends of the wires extend along the first direction X to serve as the first pin 141 and the second pin 142.

[0170] Figure 18 is a schematic diagram of the secondary winding 14 in some other embodiments. As shown in Figure 18, the secondary winding 14 is made of metal foil and is constructed in an open shape. For example, a portion of the secondary winding 14 is wrapped around the circumference of the magnetic core 12, and the two ends of the secondary winding 14 extend along a first direction X to serve as a first pin 141 and a second pin 142.

[0171] The first pin 141 and the second pin 142 on the same secondary winding 14 extend in the same direction. Along the extension direction of the first pin 141 and the second pin 142, the first pin 141 and the second pin 142 on the same secondary winding 14 are located on the same side of the magnetic core 12, that is, the first pin 141 and the second pin 142 both extend radially away from the magnetic core 12. One of the first pin 141 and the second pin 142 is the positive terminal of the secondary winding 14, that is, the output terminal of the low-voltage current, and the other is the negative terminal of the secondary winding 14, that is, the return terminal of the low-voltage current. Taking the output of 12V low-voltage current of the resonant transformer 1 as an example, one of the first pin 141 and the second pin 142 is the output terminal of the 12V current, and the other is the return terminal of the approximately 0V current. The first pin 141 and the second pin 142 are electrically connected to the circuit board 210 to achieve a stable output of low-voltage current. The following examples all use the first pin 141 as the return terminal with an approximate current of 0V and the second pin 142 as the output terminal with a current of 12V.

[0172] As shown in Figure 18, in this embodiment of the application, the secondary winding 14 is made of metal foil, which can be copper foil, aluminum foil, etc. This embodiment of the application does not impose any special limitations on the material of the secondary winding 14.

[0173] When multiple lead-out modules 145 are arranged at Z-intervals along the axial direction of the magnetic core 12, the pins of the secondary winding 14 are also arranged along the Z-axis of the magnetic core 12.

[0174] In some embodiments, the pin arrangement is shown in Figure 19. Taking the structure of side A 16 in Figure 19 as an example, the first pin 141 and the second pin 142 on the same secondary winding 14 correspond to each other in the second direction Y. Multiple first pins 141 are arranged at intervals along the axial direction Z of the magnetic core 12, and multiple second pins 142 are arranged at intervals along the axial direction Z of the magnetic core 12. That is, the first pin 141 of each secondary winding 14 and the first pin 141 of its adjacent secondary winding 14 are arranged at intervals along the axial direction Z of the magnetic core 12, and the second pin 142 of each secondary winding 14 and the second pin 142 of its adjacent secondary winding 14 are arranged at intervals along the axial direction Z of the magnetic core 12. The first pin 141 and the second pin 142 are respectively connected to the positive and negative terminals of the rectifier 3 so that the rectifier 3 can rectify the current output by the secondary winding 14.

[0175] In other embodiments, the pin arrangement is as shown in Figure 20. Taking the structure of side A 16 in Figure 20 as an example, the first pin 141 and the second pin 142 on the same secondary winding 14 correspond in the second direction Y. The first pin 141 and the second pin 142 are alternately arranged at an axial Z-interval in the magnetic core 12. That is, the first pin 141 of each secondary winding 14 and the second pin 142 of its adjacent secondary winding 14 are arranged at an axial Z-interval in the magnetic core 12, and the second pin 142 of each secondary winding 14 and the first pin 141 of its adjacent secondary winding 14 are arranged at an axial Z-interval in the magnetic core 12. The first pin 141 and the second pin 142 are respectively connected to the positive and negative terminals of the rectifier 3. In this embodiment, the first pin 141 and the second pin 142 are arranged alternately at an axial Z interval on the magnetic core 12, so that the rectifier 3 can be directly electrically connected to the first pin 141 and the second pin 142 that are adjacent on the axial Z of the magnetic core 12. This simplifies the electrical connection method between the rectifier 3 and the first pin 141 and the second pin 142, thereby helping to reduce the cost of the power supply 200.

[0176] Based on the electrical connection method between the pins and the circuit board 210, there are two forms: direct connection and indirect connection.

[0177] Taking the structure shown in Figure 20 as an example, the first pin 141 and the second pin 142 are both directly electrically connected to the circuit board 210. For example, the circuit board 210 and the magnetic core 12 are arranged along the extension direction of the pins. For example, the circuit board 210 and the magnetic core 12 are arranged along the first direction X. The first pin 141 and the second pin 142 are directly inserted into the holes on the circuit board 210 and electrically connected to the conductor layer on the circuit board 210. By adjusting and controlling the direction of the conductor layer, the first pin 141 and the output terminal 220 are electrically connected through the conductor layer of the circuit board 210, and the second pin 142 and the output terminal 220 are electrically connected through the conductor layer of the circuit board 210.

[0178] Figure 21 is a schematic diagram of the power supply structure in the related technology. Taking the structure of side A 16' in Figure 21 as an example, the first pin 141' and the second pin 142' are directly electrically connected to the circuit board 210'. The circuit board 210' has a high integration and a large density of electronic components, which makes the area of ​​the conductor layer on the circuit board 210' small. That is, the area on the circuit board 210' used to transmit induced current is small, resulting in poor transmission efficiency of induced current on the circuit board 210'. This leads to a large difference between the actual peak value and the theoretical peak value of the output current of the resonant transformer 1', thereby reducing the output power of the resonant transformer 1'.

[0179] In view of this, Figure 22 is a partial structural schematic diagram of the power supply 200 provided in some embodiments of this application. As shown in Figure 22, the resonant transformer 1 provided in the embodiments of this application is also provided with a bus 2. The bus 2 is electrically connected between the first pin 141 and the circuit board 210, and / or the bus 2 is electrically connected between the second pin 142 and the circuit board 210. That is, at least one of the first pin 141 and the second pin 142 is connected to the circuit board 210 through the bus 2, so that the conductor layer of the circuit board 210 and the bus 2 are both used to transmit induced current, thereby increasing the area for transmitting induced current and improving the efficiency of induced current output and return, which is conducive to further improving the output power of the resonant transformer 1 and the power supply 200. Meanwhile, current is transmitted through bus 2. During the transmission process, the temperature of bus 2 will rise. By increasing the size and area of ​​bus 2, the contact area between bus 2 and air can be increased, which improves the heat dissipation efficiency of bus 2. This improves the overall heat dissipation capacity of resonant transformer 1, thereby improving the temperature reliability of resonant transformer 1, circuit board 210 and power supply 200.

[0180] Next, this application specification will describe a power supply 200 provided by this application in conjunction with specific embodiments and accompanying drawings.

[0181] Figure 23 is a cross-sectional view of the power supply 200 provided in this application in some embodiments. As shown in Figure 23, the magnetic core 12 of the resonant transformer 1 and the circuit board 210 are arranged along the axial direction Z of the magnetic core 12, and the plane of the circuit board 210 is perpendicular to the axial direction Z of the magnetic core 12. The plane of the circuit board 210 refers to the surface on the circuit board 210 used for mounting electronic components.

[0182] Figure 24 is a structural diagram of the resonant transformer 1 provided in an embodiment of this application. As shown in Figure 24, the resonant transformer 1 is provided with at least a first bus 21, which is electrically connected between the first pin 141 and the circuit board 210. Here, "between" only indicates the electrical connection relationship between the first pin 141, the first bus 21, and the circuit board 210, and is not a limitation on the spatial position of the first pin 141, the first bus 21, and the circuit board 210. In addition, referring to Figures 23 and 24, along the axial direction Z of the magnetic core 12, at least a portion of the structure of the first bus 21 is located between the magnetic core 12 and the circuit board 210.

[0183] In this embodiment, a first bus 21 is added between the secondary winding 14 and the circuit board 210. By adjusting the size and area of ​​the first bus 21, the transmission efficiency of the induced current by the first bus 21 can be increased. At the same time, it can simplify the structure of the conductor layer on the circuit board 210, reduce the cost of the circuit board 210, and improve the current transmission efficiency, thereby increasing the output power of the resonant transformer 1 and the power supply 200. Meanwhile, as the current is transmitted through the first bus 21, the temperature of the first bus 21 will rise during the transmission process. The large size and area of ​​the first bus 21 result in a large contact area between the first bus 21 and the air, that is, the heat dissipation efficiency of the first bus 21 is high, thereby improving the overall heat dissipation capacity of the resonant transformer 1, so as to improve the temperature reliability of the resonant transformer 1, the circuit board 210, and the power supply 200.

[0184] In the resonant transformer 1 provided in this application, the secondary winding 14 is indirectly connected to the circuit board 210 with the output terminal 220 via a busbar 2. Due to the larger size and area of ​​the busbar 2, the current transmission efficiency between the secondary winding 14 and the output terminal 220 is improved, ensuring that the actual peak efficiency of the resonant transformer 1 is not less than 97.6% of the theoretical peak efficiency. This increases the output power of the resonant transformer 1 and the power supply 200 equipped with the resonant transformer 1, making it more suitable for high-efficiency applications of the resonant transformer 1 and the power supply 200, facilitating its use in high-density, high-power power supplies 200. Furthermore, compared to a direct connection between the secondary winding 14 and the circuit board 210, the indirect connection via the large-area busbar 2 is more conducive to improving the heat dissipation efficiency of the resonant transformer 1, resulting in an overall temperature drop of more than 10°C for the power supply 200 with the resonant transformer 1.

[0185] Figure 25 is a schematic diagram of the structure of the first bus 21 in some embodiments. In some embodiments, as shown in Figure 25, the first bus 21 has a first bent section 211. Referring to Figures 24 and 25, the first bent section 211 extends from the portion of the first bus 21 located between the magnetic core 12 and the circuit board 210 in a direction away from the circuit board 210. At least a portion of the structure of the first bent section 211 is radially distributed with the magnetic core 12. The first bent section 211 is electrically connected to the first pin 141 and electrically insulated from the second pin 142. The bending of the first bus 21 to form the first bent section 211 electrically connected to the first pin 141 reduces the difficulty of electrical connection between the first bus 21 and the first pin 141. The bending of the first bus 21 to form the first bent section 211 increases the area of ​​the first bus 21, which is beneficial to further improve the heat dissipation efficiency of the first bus 21.

[0186] In some embodiments, the first bent segment 211 can be directly electrically connected to the first pin 141. For example, the first bent segment 211 has a socket, the first pin 141 is inserted into the socket along a first direction X, and the first pin 141 makes electrical contact with the wall forming the socket, thereby achieving the electrical connection between the first bent segment 211 and the first pin 141. This direct electrical connection between the first bent segment 211 and the first pin 141 simplifies the electrical connection structure between the first busbar 21 and the first pin 141, thus simplifying the overall structure of the resonant transformer 1 and reducing the assembly difficulty and cost of the resonant transformer 1.

[0187] Figure 26 is a schematic diagram of the structure of the first bus 21 in some other embodiments. In some other embodiments, as shown in Figure 26, the end of the first bent section 211 facing away from the circuit board 210 is bent and extended in the first direction X toward the direction away from the magnetic core 12 to form a bent end 212.

[0188] Figure 27 is a schematic diagram of the resonant transformer 1 provided in this application in some other embodiments. As shown in Figure 27, the resonant transformer 1 further includes a connecting plate 4. The connecting plates 4 are arranged at intervals along the first direction X on one or both sides of the magnetic core 12. The connecting plates 4 and the circuit board 210 are arranged along the axial direction Z of the magnetic core 12, and the plane direction of the connecting plates 4 is parallel to the axial direction of the magnetic core 12, that is, the thickness direction of the connecting plates 4 is parallel to the axial direction of the magnetic core 12. Each first pin 141 is electrically connected to the first bent section 211 through the connecting plate 4, and each second pin 142 is electrically insulated from the connecting plate 4.

[0189] In this embodiment, the connecting plate 4 is electrically connected between the first pin 141 and the first bus 21. The word "between" here is only used to indicate the electrical connection relationship between the first pin 141, the connecting plate 4 and the first bus 21, and is not a limitation on the spatial position of the first pin 141, the connecting plate 4 and the first bus 21. This simplifies the structure of the first bus 21 and reduces the cost of the first bus 21.

[0190] As shown in Figure 27, the connecting plate 4 has multiple through holes, which are respectively labeled as the first through hole 41, the second through hole 42, and the third through hole 43. The first through hole 41, the second through hole 42, and the third through hole 43 penetrate the connecting plate 4 in a direction perpendicular to the plane of the connecting plate 4. For example, the first through hole 41, the second through hole 42, and the third through hole 43 penetrate the connecting plate 4 in a first direction X. The first pin 141 passes through the connecting plate 4 from the first through hole 41 in the first direction X and is electrically connected to the connecting plate 4. The second pin 142 passes through the first through hole 41 in the first direction X and is electrically connected to the connecting plate 4. The two through holes 42 pass through the connecting plate 4 and are electrically insulated from the connecting plate 4. The bent end 212 passes through the connecting plate 4 from the third through hole 43 along the first direction X and is electrically connected to the connecting plate 4. This improves the connection stability between the secondary winding 14 and the connecting plate 4, and between the first busbar 21 and the connecting plate 4, and reduces the risk of electrical connection failure caused by the separation of the secondary winding 14 and the connecting plate 4, and between the first busbar 21 and the connecting plate 4. This is beneficial to improving the working stability of the resonant transformer 1, the power supply 200 with the resonant transformer 1, and the electronic equipment 1000 with the power supply 200. The first pin 141 passes through the connecting plate 4 through the first through hole 41, the second pin 142 passes through the connecting plate 4 through the second through hole 42, and the bent end 212 passes through the connecting plate 4 through the third through hole 43. This reduces the arrangement space of the connecting plate 4 and the secondary winding 14 in the first direction X, thereby helping to reduce the size of the resonant transformer 1 and the power supply 200 with the resonant transformer 1 in the first direction X. This facilitates the miniaturization design of the resonant transformer 1, the power supply 200 with the resonant transformer 1, and the electronic device 1000 with the power supply 200.

[0191] In some embodiments, the connecting plate 4 can be a conductive plate structure; for example, the connecting plate 4 is a metal plate to reduce its cost. In other embodiments, electronic components can be mounted on the connecting plate 4, and the connecting plate 4 can also have exposed conductor layer structures, allowing at least two electronic components on the connecting plate 4 to be electrically connected through the conductor layer structure. This allows the first pin 141 and the second pin to be electrically connected to the electronic components on the connecting plate 4 through the conductor layer structure, and allows external electronic components to be electrically connected to the electronic components on the connecting plate 4 through the conductor layer structure, thereby improving the performance of the resonant transformer 1 and enhancing the integration and performance of the power supply 200. The rectifier 3, which is electrically connected to the first pin 141 and the second pin 142, can be mounted on the circuit board 210 or on the connecting plate 4. In this embodiment, the rectifier 3 is mounted on the connecting plate 4 to further simplify the electrical connection between the rectifier 3 and the first pin 141 and the second pin 142.

[0192] Referring again to Figures 24 and 26, the first bus 21 has a second bent section 213 along the axial direction Z of the magnetic core 12. The second bent section 213 extends from the portion of the first bus 21 located between the magnetic core 12 and the circuit board 210 toward the circuit board 210. The second bent section 213 is electrically connected to the circuit board 210, thereby simplifying the connection method between the first bus 21 and the circuit board 210, and further simplifying the structure of the first bus 21 and the circuit board 210, so as to reduce the cost of the resonant transformer 1, the power supply 200 having the resonant transformer 1, and the electronic device 1000 having the power supply 200.

[0193] In some embodiments, the second bent segment 213 can directly abut against the conductor layer on the circuit board 210 along the axial Z-axis of the magnetic core 12. In other embodiments, the second bent segment 213 can be inserted into a socket on the circuit board 210, and the second bent segment 213 is electrically connected to the wall portion forming the socket, thereby achieving an electrical connection between the second bent segment 213 and the circuit board 210. This application does not impose any special limitations on the form of electrical connection between the second bent segment 213 and the circuit board 210.

[0194] Figure 28 is a schematic diagram of the resonant transformer 1 provided in this application in some embodiments. As shown in Figure 28, the bus 2 also includes a second bus 22. Along the axial direction Z of the magnetic core 12, the second bus 22 and the magnetic core 12 are located on the same side of the circuit board 210. The second bus 22 is electrically connected between the second pin 142 and the circuit board 210. The word "between" here is only used to indicate the electrical connection relationship between the second pin 142, the second bus 22 and the circuit board 210, and is not a limitation on the spatial position of the first pin 141, the first bus 21 and the circuit board 210.

[0195] In this embodiment, a second bus 22 is added between the secondary winding 14 and the circuit board 210. By adjusting the size and area of ​​the second bus 22, the transmission efficiency of the induced current can be increased. This also simplifies the structure of the conductor layer on the circuit board 210, reducing its cost while improving current transmission efficiency, thereby increasing the output power of the resonant transformer 1 and the power supply 200 equipped with it. Since most of the current is transmitted through the second bus 22, its temperature rises during transmission. The larger size and area of ​​the second bus 22 result in a larger contact area with the air, leading to higher heat dissipation efficiency. This improves the heat dissipation capacity of the resonant transformer 1 and the power supply 200 equipped with it, thus enhancing the temperature reliability of the circuit board 210, the resonant transformer 1, the power supply 200 equipped with it, and the electronic device 1000 operating at that voltage.

[0196] As shown in Figure 28, the portion of the second busbar 22 used for electrical connection with the second pin 142 is designated as the fixing plate 221. The planar direction of the fixing plate 221 is perpendicular to the radial direction of the magnetic core 12. For example, the thickness direction of the fixing plate 221 is parallel to the first direction X. Figure 29 is a partial structural diagram of the resonant transformer 1, and Figure 30 is a partial structural schematic diagram of the fixing plate 221 of the second busbar 22. Referring to both Figures 29 and 30, the fixing plate 221 has multiple fixing through holes. Each fixing through hole penetrates the fixing plate 221 radially along the magnetic core 12. Each first pin 141 passes through the fixing plate 221 from one fixing through hole radially along the magnetic core 12, and the first pin 141 is electrically insulated from the fixing through hole. Each second pin 142 passes through the fixing plate 221 from one fixing through hole radially along the magnetic core 12, and each second pin 142 is electrically connected to the fixing plate 221.

[0197] As shown in Figure 30, the fixing through holes are respectively designated as the first fixing through hole 227 and the second fixing through hole 228. Both the first fixing through hole 227 and the second fixing through hole 228 penetrate the fixing plate 221 along the first direction X. Referring to Figures 29 and 30, the first pin 141 passes through the fixing plate 221 from the first fixing through hole 227 along the first direction X, leaving a gap between the wall of the first fixing through hole 227 and the first pin 141, thereby electrically insulating the first pin 141 from the second busbar 22. The second pin 142 passes through the fixing plate 221 of the second busbar 22 from the second fixing through hole 228 along the first direction X, and the second pin 142 is electrically connected to the second busbar 22 at the second fixing through hole 228.

[0198] In this embodiment, the provision of a first fixed through hole 227 and a second fixed through hole 228 simplifies the electrical connection structure between the first pin 141 and the connecting plate 4, and between the second pin 142 and the second busbar 22, thereby simplifying the structure of the second busbar 22 and reducing its cost.

[0199] When the first pin 141 and the second pin 142 are arranged as shown in Figure 19, multiple first fixed through holes 227 are arranged along the axial direction Z of the magnetic core 12, and multiple second fixed through holes 228 are arranged along the axial direction Z of the magnetic core 12. The first fixed through holes 227 and the second fixed through holes 228 correspond one-to-one in the second direction Y. When the first pin 141 and the second pin 142 are arranged as shown in Figure 20, the first fixed through holes 227 and the second fixed through holes 228 are arranged alternately along the axial direction Z of the magnetic core 12.

[0200] As shown in Figure 29, the resonant transformer 1 may also include a frame 15, which is mounted on the housing 11 along the axial direction Z of the magnetic core 12. At least a portion of the frame 15 is located on the side of the first busbar 21 away from the circuit board 210, along the radial direction of the magnetic core 12, for example, along the first direction X. At least a portion of the frame 15 is located between the fixing plate 221 of the second busbar 22 and the magnetic core 12.

[0201] Figure 31 is a schematic diagram of the structure of the skeleton 15. As shown in Figure 31, the insulating skeleton 15 has a support hole that passes through the skeleton radially along the magnetic core 12. For example, the support hole passes through the skeleton 15 along the first direction X. Each first pin 141 and each second pin 142 passes through the skeleton 15 from a support hole. The support holes are referred to as the first support hole 151 and the second support hole 152, respectively. The first pin 141 passes through the skeleton 15 from the first support hole 151 and is electrically connected to the first busbar 21. The second pin 142 passes through the skeleton 15 from the second support hole 152 and is electrically connected to the second busbar 22.

[0202] In this embodiment, when the first pin 141 and the second pin 142 are subjected to force and have a tendency to deform along the axial direction Z of the magnetic core 12, the frame 15 can support the first pin 141 and the second pin 142, thereby reducing the risk of the first pin 141 and the second pin 142 deforming along the axial direction Z of the magnetic core 12 and failing to connect with the busbar 2 and the circuit board 210, thereby improving the stability and reliability of the electrical connection between the secondary winding 14 and the busbar 2.

[0203] The first pin 141 is electrically insulated from the wall portion forming the first support hole 151. Specifically, the space between the first pin 141 and the wall portion forming the first support hole 151 is filled with insulating material, or the wall portion forming the first support hole 151 is made of insulating material. The second pin 142 is electrically insulated from the wall portion forming the second support hole 152. Specifically, the space between the second pin 142 and the wall portion forming the second support hole 152 is filled with insulating material, or the wall portion forming the second support hole 152 is made of insulating material. In this embodiment, the entire skeleton 15 is made of insulating material to reduce the processing difficulty of the skeleton 15.

[0204] Along the radial direction of the magnetic core 12, for example along the first direction X, as shown in FIG32, at least a portion of the structure of the fixing plate 221 is located between the connecting plate 4 and the magnetic core 12, that is, at least a portion of the structure of the fixing plate 221 is located between the connecting plate 4 and the frame 15, so as to reduce the overall size of the resonant transformer 1 and the power supply 200 having the resonant transformer 1, thereby facilitating the miniaturization design of the resonant transformer 1, the power supply 200 having the resonant transformer 1, and the electronic size of the power supply 200.

[0205] As shown in Figure 31, the frame 15 is provided with a first protrusion 153. The first protrusion 153 and the magnetic core 12 are located on the same side of the circuit board 210 along the axial direction Z of the magnetic core 12. The first protrusion 153 extends along the first direction X and surrounds the periphery of the first support hole 151. The first protrusion 153 is made of insulating material.

[0206] As shown in Figure 31, the frame 15 is provided with a second protrusion 154. The second protrusion 154 and the magnetic core 12 are located on the same side of the circuit board 210 along the axial direction Z of the magnetic core 12. The second protrusion 154 extends along the first direction X. The second protrusion 154 is located between the fixing plate 221 and the circuit board 210 in the axial direction Z of the magnetic core 12, and / or, the fixing plate 221 is located between the second protrusion 154 and the circuit board 210 in the axial direction Z of the magnetic core 12. That is, the second protrusion 154 can be located on one or both sides of the fixing plate 221 in the axial direction Z of the magnetic core 12.

[0207] As shown in Figure 32, a second gap 6 is left between the fixing plate 221 and the connecting plate 4 to form a second air duct, thereby further improving the heat dissipation capacity of the second busbar 22.

[0208] The frame 15 is provided with a second protrusion, which is formed by at least one of the first protrusion 153 and the second protrusion 154. The second protrusion and the magnetic core 12 are located on the same side of the circuit board 210 along the axial direction Z of the magnetic core 12, and the second protrusion protrudes from the surface of the second busbar 22 opposite to the magnetic core 12, allowing the second protrusion to abut against the connecting plate 4 in the first direction X, as shown in Figure 32. The second protrusion provides a second gap 6 between the connecting plate 4 and the fixing plate 221 of the second busbar 22. During the operation of the resonant transformer 1, air can flow through the second gap 6, thereby dissipating heat from the second busbar 22 and the connecting plate 4, further improving the heat dissipation capacity of the resonant transformer 1 and the power supply 200.

[0209] In this embodiment, a first protrusion 153 is provided around the periphery of the first support hole 151. When the first protrusion 153 forms the aforementioned second protrusion, it can simultaneously support the first pin 141 and the connecting plate 4. While ensuring that the connecting plate 4 and the second busbar 22 have a second gap 6, it can increase the size for supporting the first pin 141, thereby improving the support effect of the frame 15 on the first pin 141. The second protrusion 154 is provided on the outside of the fixing plate 221. When the second protrusion 154 forms the aforementioned second protrusion, while ensuring that the fixing plate 221 and the connecting plate 4 have a second gap 6, the structure of the fixing plate 221 can be simplified.

[0210] The number of first protrusions 153 can be one or more. In this embodiment, each first protrusion 153 corresponds to a first pin 141.

[0211] The frame 15 can be provided with a first protrusion 153 alone, or a second protrusion 154 alone, or both the first protrusion 153 and the second protrusion 154 can be provided at the same time.

[0212] In some embodiments, the protrusion height of the first protrusion 153 is less than the protrusion height of the second protrusion 154, that is, when the second protrusion 154 abuts against the connecting plate 4, there is a gap between the first protrusion 153 and the connecting plate 4.

[0213] In other embodiments, the protrusion height of the first protrusion 153 is equal to the protrusion height of the second protrusion 154, that is, the first protrusion 153 and the second protrusion 154 can simultaneously abut against the connecting plate 4 in the first direction X, so as to increase the contact area between the frame 15 and the connecting plate 4, thereby improving the support effect of the frame 15 on the connecting plate 4.

[0214] Referring to Figures 29 and 30, the first protrusion 153 passes through the second busbar 22 from the first fixed through hole 227 along the first direction X and is used to abut against the connecting plate 4.

[0215] In this embodiment, the first protrusion 153 passes through the first fixing through hole 227, which helps to reduce the overall size of the second bus 22 and the frame 15 in the first direction X, and also helps to further simplify the structure of the second bus 22. At the same time, the first protrusion 153 passes through the first fixing through hole 227, and the first protrusion 153 is made of insulating material, so that the first pin 141 and the second bus 22 are electrically insulated through the first protrusion 153. That is, the wall portion used to form the first fixing through hole 227 can contact the first protrusion 153, so as to reduce the size of the first fixing through hole 227 and improve the structural strength of the fixing plate 221.

[0216] When the first fixing through hole 227 is located close to the edge of the fixing plate 221, the first fixing through hole 227 can penetrate the edge of the fixing plate 221 to form a notch, so as to facilitate the processing of the first fixing through hole 227 and also improve the structural strength of the edge of the fixing plate 221.

[0217] Figure 33 is a partial structural schematic diagram of the resonant transformer 1. As shown in Figure 33, the portion of the first busbar 21 located between the magnetic core 12 and the circuit board 210 has a mounting hole 214. The mounting hole 214 extends through the first busbar 21 along the axial direction Z of the magnetic core 12. A fourth protrusion (not shown in the figure) is provided on the frame 15. The fourth protrusion extends along the axial direction Z of the magnetic core 12. At least a portion of the fourth protrusion can be inserted into the mounting hole 214 along the axial direction Z of the magnetic core 12, and the fourth protrusion can cooperate with the wall portion used to form the mounting hole 214.

[0218] During the assembly of the resonant transformer 1, the housing 11 is first fixed to the magnetic core 12, primary winding 13, secondary winding 14 and other structures inside the housing 11. Then, the frame 15 is fixed to the housing 11. After that, the fourth protrusion on the frame 15 is inserted into the assembly hole 214 of the first busbar 21. Finally, the first pin 141 is welded to the first busbar 21, and the second pin 142 is riveted to the second busbar 22 or fastened with fasteners.

[0219] In this embodiment, the cooperation between the fourth protrusion and the mounting hole 214 can pre-position the frame 15 and the first busbar 21, thereby improving the relative positional accuracy of the frame 15 and the first busbar 21, which in turn helps to improve the assembly efficiency of the resonant transformer 1.

[0220] Figure 34 is a structural diagram of the resonant transformer 1 in Figure 28 from another perspective. As shown in Figure 34, one end of the fixing plate 221 is bent and extended circumferentially along the magnetic core 12 to form a third bent section 222. That is, a part of the structure of the second bus 22 extends circumferentially along the magnetic core 12, so that the second bus 22 can be bent into an L-shape, V-shape, U-shape or other deformed structure, thereby further increasing the size and area of ​​the second bus 22 and further improving the transmission efficiency and heat dissipation capacity of the second bus 22 for induced current. At the same time, bending one end of the second bus 22 to form the third bent section 222 also helps to increase the contact area between the second bus 22 and the air, thereby further improving the heat dissipation efficiency of the bus 2.

[0221] In this embodiment, the first pin 141 is the return terminal with an approximate 0V current, that is, the first pin 141 is the negative pin, and the second pin 142 is the output terminal with a 12V current, that is, the second pin 142 is the positive pin. During the current transmission between the secondary winding 14 and the bus 2, the temperature of the second bus 22 will rise significantly under the action of the 12V current. Bending one end of the second bus 22 to form a third bending section 222 can improve the heat dissipation capacity of the second bus 22, thereby reducing the loss caused by the conversion of electrical energy into heat energy during the current transmission process, that is, reducing the current loss of the second bus 22, so as to improve the output power of the resonant transformer 1 and the power supply 200.

[0222] In some embodiments, one end of the fixing plate 221 is bent once to directly form the third bent segment 222, thereby simplifying the structure of the second busbar 22. In other embodiments, as shown in FIG28, one end of the fixing plate 221 is bent multiple times, so that at least one fourth bent segment 223 is formed between the fixing plate 221 and the third bent segment 222, in order to further increase the area of ​​the busbar 2 and further improve the current transmission efficiency and heat dissipation performance of the busbar 2.

[0223] In addition, one end of the third bending segment 222 bends and extends along the axial direction Z of the magnetic core 12 toward the direction close to the circuit board 210 to form a fifth bending segment 224. The fifth bending segment 224 is electrically connected to the circuit board 210, that is, a part of the structure of the second bus 22 extends along the axial direction Z of the magnetic core 12 to simplify the electrical connection structure between the second bus 22 and the circuit board 210.

[0224] When the magnetic core 12 is provided with a first pin 141 and a second pin 142 on both sides, as shown in Figure 34, there are at least two second buses 22. In this embodiment, two second buses 22 are used as an example. The two second buses 22 are respectively referred to as the first bus sub-bus 225 and the second bus sub-bus 226. The first bus sub-bus 225 and the second bus sub-bus 226 are arranged and fixedly connected along the circumference of the magnetic core 12, and the first bus sub-bus 225 and the second bus sub-bus 226 surround at least a part of the magnetic core 12. The first bus sub-bus 235 and the second bus sub-bus 226 are electrically connected to two second pins 142 that are at an angle to each other. For example, the first bus sub-bus 235 and the second bus sub-bus 226 are electrically connected to the second pins 142 located on both sides of the magnetic core 12. The connection methods of the first busbar 225 and the second busbar 226 include, but are not limited to, welding, bonding, riveting, and connection by fasteners. In this application embodiment, no special limitation is made on the connection method of the first busbar 225 and the second busbar 226, and the first busbar 225 and the second busbar 226 can be electrically connected or electrically insulated.

[0225] In this embodiment, the second busbar 22 is configured as a fixed connection between the first busbar 225 and the second busbar 226, which facilitates the processing of the second busbar 22, thereby reducing the processing difficulty of the second busbar 22 and reducing the processing cost of the second busbar 22.

[0226] As shown in Figure 34, one of the first busbar 225 and the second busbar 226 is provided with a third protrusion 225a and the other is provided with a recess 226a. At least a portion of the third protrusion 225a is located in the recess 226a. The cooperation of the third protrusion 225a and the recess 226a is used to limit the relative position of the first busbar 225 and the second busbar 226.

[0227] In this embodiment, during the installation of the first busbar 225 and the second busbar 226, the cooperation of the third protrusion 225a and the recess 226a can improve the relative positional accuracy of the first busbar 225 and the second busbar 226, thereby improving the connection accuracy and reliability of the first busbar 225 and the second busbar 226.

[0228] Referring again to Figure 32, at least a portion of the structure of the second busbar 22 is located outside the housing 11 along the radial direction of the magnetic core 12. A first gap 5 is left between the portion of the second busbar 22 located outside the housing 11 and a portion of the structure of the housing 11. The distribution direction of the third bent section 222 and the housing 11 is denoted as the second direction Y. For example, along the second direction Y, the first gap 5 is left between the second busbar 22 and the magnetic core 12. Specifically, the first gap 5 is left between the second busbar 22 and the housing 11, thus forming a first air duct. During the operation of the resonant transformer 1, air can flow through the first gap 5, thereby achieving heat dissipation of the second busbar 22 and further improving its heat dissipation capacity. Gaps may also be left between other bent sections of the second busbar 22 and the housing 11 to further improve the heat dissipation capacity of the second busbar 22.

[0229] Figure 35 is a partial structural schematic diagram of the power supply 200 in some embodiments. As shown in Figure 35, the housing 11 has a first protrusion 111. The first protrusion 111 and the magnetic core 12 are located on the same side of the circuit board 210 along the axial direction Z of the magnetic core 12. The first protrusion 111 extends radially along the magnetic core 12. For example, the first protrusion 111 extends along the second direction Y. Referring to Figures 34 and 32, at least a portion of the structure of the first protrusion 111 abuts against the circuit board 210 and the second busbar 22 in the second direction Y. The first protrusion 111 is used to leave a first gap 5 between the second busbar 22 and the housing 11.

[0230] In this embodiment, the first protrusion 111 can support the second bus 22, reducing the risk that the first gap 5 will be blocked due to the second bus 22 being recessed toward the magnetic core 12, thereby improving the heat dissipation stability of the second bus 22.

[0231] Figure 36 is a magnified view of a partial structure at the first protrusion 111. As shown in Figure 36, the first protrusion 111 has a limiting hole 111a, which penetrates the first protrusion 111 along the axial direction Z of the magnetic core 12.

[0232] Figure 37 is an enlarged view of the connection structure between the second busbar 22 and the first protrusion 111. As shown in Figure 37, a part of the structure of the second busbar 21 extends along the axial direction Z of the magnetic core 12 through the limiting hole 111a to one side of the circuit board 210 to form the aforementioned fifth bending segment 224. The fifth bending segment 224 is electrically connected to the circuit board 210, that is, the fifth bending segments 224 on the first busbar 225 and the second busbar 226 are both inserted into the limiting hole 111a along the axial direction Z of the magnetic core 12, and the fifth bending segment 224 can abut against the wall portion used to form the limiting hole 111a. For example, the fifth bending segment 224 can abut against the wall portion used to form the limiting hole 111a in the second direction Y.

[0233] In this embodiment, the limiting hole 111a can improve the accuracy of the installation position of the second bus 22, thereby improving the accuracy of the relative position of the second bus 22 and the magnetic core 12, reducing the risk that the second bus 22 will not be able to be electrically connected to the circuit board 210 due to the offset of the second bus 22, so as to reduce the difficulty of connecting the second bus 22 and the circuit board 210.

[0234] The power supply 200 provided in this application is equipped with the resonant transformer 1 provided in any of the above embodiments. That is, the power supply 200 provided in this application has all the possible beneficial effects provided in any of the above embodiments. For example, the resonant transformer 1 is connected to the circuit board 210 through the bus 2, which increases the current transmission efficiency and improves the output power of the power supply 200. The bus 2 with a larger area can also improve the overall heat dissipation capacity of the power supply 200 and improve the temperature reliability of the power supply 200.

[0235] The electronic device 1000 provided in this application has the above-mentioned power supply 200, that is, the electronic device 1000 provided in this application has all the possible beneficial effects provided by any of the above embodiments. For example, the higher output power of the power supply 200 makes the electronic device 1000 have higher working efficiency, and the higher heat dissipation efficiency of the power supply 200 improves the temperature reliability of the electronic device 1000.

[0236] For the same or similar parts among the various embodiments in this specification, please refer to each other.

Claims

1. A power supply, characterized in that, The power supply includes a magnetic core, a primary winding, a secondary winding, a circuit board, and a first busbar. The primary and secondary windings are sleeved around the magnetic core and arranged along the axial direction of the magnetic core. The circuit board is spaced along the axial direction of the magnetic core on one side, and the plane of the circuit board is perpendicular to the axial direction of the magnetic core. The two ends of the secondary winding are respectively provided with a first pin and a second pin, which are used for electrical connection with the circuit board. Both the first and second pins extend radially away from the magnetic core. There are multiple first pins and multiple second pins, which are spaced along the axial direction of the magnetic core, with each first pin corresponding to one second pin. The first pin is electrically connected to the circuit board via the first bus. At least a portion of the structure of the first bus is located between the magnetic core and the circuit board along the axial direction of the magnetic core. The first bus has a first bend along the axial direction of the magnetic core, extending from the at least a portion of the structure of the first bus located between the magnetic core and the circuit board in a direction away from the circuit board. The first bend is used for electrical connection with the first pin, and the first bend is electrically insulated from the second pin.

2. The power supply according to claim 1, characterized in that, The power supply also includes connecting plates, which are arranged radially on one side of the magnetic core, and the planar direction of the connecting plates is parallel to the axial direction of the magnetic core. Each of the first pins is electrically connected to the first bent section via the connecting plate, and each of the second pins is electrically insulated from the connecting plate.

3. The power supply according to claim 2, characterized in that, The connecting plate includes a plurality of through holes, each of which penetrates the connecting plate in a direction perpendicular to the plane of the connecting plate. Each first pin passes through the connecting plate from one of the through holes, and each second pin passes through the connecting plate from one of the through holes.

4. The power supply according to claim 3, characterized in that, The first bent segment extends radially away from the circuit board at one end, and the first bent segment passes through the connecting plate from one of the through holes and is electrically connected to the connecting plate.

5. The power supply according to any one of claims 1 to 4, characterized in that, The first busbar has a second bend along the axial direction of the magnetic core, the second bend extending from at least the portion of the first busbar located between the magnetic core and the circuit board toward the circuit board, the second bend being electrically connected to the circuit board.

6. The power supply according to any one of claims 1 to 5, characterized in that, The power supply further includes a second bus along the axial direction of the magnetic core. The second bus and the magnetic core are located on the same side of the circuit board. The second bus is electrically connected between the second pin and the circuit board, wherein: A portion of the structure of the second bus extends along the axial direction of the magnetic core; Another portion of the structure of the second bus extends circumferentially along the magnetic core.

7. The power supply according to claim 6, characterized in that, The second busbar has a fixing plate, the plane of which is perpendicular to the radial direction of the magnetic core. The fixing plate has multiple fixing through holes, each of which penetrates the fixing plate radially along the magnetic core, wherein: Each of the first pins passes through the fixing plate from one of the fixing through holes along the radial direction of the magnetic core, and the first pins serve to provide electrical insulation between the fixing through holes; Each of the second pins passes through the fixing plate from one of the fixing through holes along the radial direction of the magnetic core, and each of the second pins is electrically connected to the fixing plate.

8. The power supply according to claim 6 or 7, characterized in that, The number of secondary windings is multiple, and the multiple secondary windings are arranged along the axial direction of the magnetic core. Each secondary winding has a first pin and a second pin, wherein: The extension direction of the second pin of each of the secondary windings and the extension direction of the second pin of the adjacent secondary winding form an angle with each other; There are two second buses, which are arranged sequentially and electrically connected along the circumference of the magnetic core. The two second buses are electrically connected to two second pins that are at an angle to each other.

9. The power supply according to any one of claims 6 to 8, characterized in that, The power supply also includes a housing, in which the magnetic core, the primary winding, and the secondary winding are all installed. At least a portion of the structure of the second busbar is located outside the housing, and a first gap is left between the portion of the second busbar located outside the housing and a portion of the structure of the housing in the radial direction of the magnetic core.

10. The power supply according to claim 9, characterized in that, The housing further includes a first protrusion that extends radially along the magnetic core and at least a portion of the structure of the first protrusion abuts between the magnetic core and the second busbar, the first protrusion being used to leave the first gap between the magnetic core and the second busbar.

11. The power supply according to any one of claims 6 to 10, characterized in that, The power supply also includes a frame, at least a portion of which is located along the axial direction of the magnetic core on the side of the first busbar away from the circuit board, and at least a portion of which is located radially between the second busbar and the magnetic core, wherein: The frame has a plurality of support holes, each of which extends through the frame radially along the magnetic core. Each first pin and each second pin passes through the frame from one of the support holes, and each support hole is used to support the corresponding first pin or second pin.

12. The power supply according to any one of claims 6 to 11, characterized in that, A portion of the structure of the second busbar is located between the connecting plate and the magnetic core along the radial direction of the magnetic core, and a second gap is left between the portion of the structure of the second busbar and the connecting plate along the radial direction of the magnetic core.

13. A resonant transformer, characterized in that, The resonant transformer includes a magnetic core, a primary winding, a secondary winding, and a first busbar. The primary winding and the secondary winding are sleeved around the magnetic core and arranged along the axial direction of the magnetic core. The secondary winding includes a first pin and a second pin, both extending radially away from the magnetic core. There are multiple first pins and multiple second pins, which are spaced apart along the axial direction of the magnetic core, with each first pin corresponding to one second pin. The first bus is used for electrical connection to the first pin. At least a portion of the structure of the first bus is arranged along the axial direction of the magnetic core. The first bus has a first bend along the axial direction of the magnetic core. The first bend extends from the first bus toward the direction close to the magnetic core. The first bend is used for electrical connection to the first pin, and the first bend is electrically insulated from the second pin.

14. The resonant transformer according to claim 13, characterized in that, The resonant transformer further includes connecting plates, which are arranged at radial intervals on one side of the magnetic core, and the planar direction of the connecting plates is parallel to the axial direction of the magnetic core. Each of the first pins is electrically connected to the first bent section via the connecting plate, and each of the second pins is electrically insulated from the connecting plate.

15. The resonant transformer according to claim 14, characterized in that, The connecting plate includes a plurality of through holes, each of which penetrates the connecting plate in a direction perpendicular to the plane of the connecting plate. Each first pin passes through the connecting plate from one of the through holes, and each second pin passes through the connecting plate from one of the through holes.

16. The resonant transformer according to claim 15, characterized in that, The first bent segment extends radially away from the circuit board at one end, and the first bent segment passes through the connecting plate from one of the through holes and is electrically connected to the connecting plate.

17. The resonant transformer according to any one of claims 13 to 16, characterized in that, The first busbar has a second bend along the axial direction of the magnetic core, the second bend extending from at least the portion of the first busbar located between the magnetic core and the circuit board toward the circuit board, the second bend being electrically connected to the circuit board.

18. The resonant transformer according to any one of claims 13 to 17, characterized in that, The resonant transformer further includes a second bus along the axial direction of the magnetic core. The second bus and the magnetic core are located on the same side of the circuit board. The second bus is electrically connected between the second pin and the circuit board, wherein: A portion of the structure of the second bus extends along the axial direction of the magnetic core; Another portion of the structure of the second bus extends circumferentially along the magnetic core.

19. The resonant transformer according to claim 18, characterized in that, The second busbar has a fixing plate, the plane of which is perpendicular to the radial direction of the magnetic core. The fixing plate has multiple fixing through holes, each of which penetrates the fixing plate radially along the magnetic core, wherein: Each of the first pins passes through the fixing plate from one of the fixing through holes along the radial direction of the magnetic core, and the first pins serve to provide electrical insulation between the fixing through holes; Each of the second pins passes through the fixing plate from one of the fixing through holes along the radial direction of the magnetic core, and each of the second pins is electrically connected to the fixing plate.

20. The resonant transformer according to claim 18 or 20, characterized in that, The number of secondary windings is multiple, and the multiple secondary windings are arranged along the axial direction of the magnetic core. Each secondary winding has a first pin and a second pin, wherein: The extension direction of the second pin of each of the secondary windings and the extension direction of the second pin of the adjacent secondary winding form an angle with each other; There are two second buses, which are arranged sequentially and electrically connected along the circumference of the magnetic core. The two second buses are electrically connected to two second pins that are at an angle to each other.

21. An electronic device, characterized in that, The electronic device includes: load; The power supply according to any one of claims 1 to 12, wherein the power supply is electrically connected to the load.

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