Auxiliary power supply module

Abstract

The utility model provides an auxiliary power supply module, which is used for supplying power to a main power supply module, and comprises a first sub-module, a second sub-module, a third sub-module, a fourth sub-module and a fifth sub-module, wherein the first sub-module comprises a first circuit board, a primary circuit, at least one first auxiliary power supply circuit and a plurality of pins; the second sub-module comprises a second circuit board, and a secondary circuit, at least one second auxiliary power supply circuit and a plurality of pins which are arranged on the second circuit board; the transformer is arranged on the first circuit board or the second circuit board; and the connector is arranged between the first sub-module and the second sub-module and is used for transmitting an electric signal between the first circuit board and the second circuit board. Wherein the first sub-module and the second sub-module are arranged on the main power supply module side by side along a first direction. According to the auxiliary power supply module, the auxiliary winding and the electrical elements are arranged by adopting the double circuit boards, so that the overall size of the module, especially the size in the length direction, is reduced, and the requirements of miniaturization and high power density of the module design are met.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronics, in particular to an auxiliary power supply module with a double circuit board structure. Background Art

[0002] The drive for miniaturization of electrical equipment has significantly limited the space available for auxiliary power modules within the equipment. For example, server power supplies, driven by the need for higher power density, need to be further reduced in size, leaving less room for auxiliary power modules. An auxiliary power supply is a type of power source within a device that provides the power required for control, protection, and monitoring. It is typically independent of the device's primary power system (i.e., the main power supply).

[0003] Current auxiliary power modules typically utilize an isolation transformer, often a planar transformer. Compared to discrete transformers, a planar transformer's coils are located within the circuit board, with the magnetic core embedded within the circuit board. This results in a smaller overall size, which helps reduce the size of the auxiliary power module. Generally speaking, auxiliary power modules have low power requirements and are often constructed using a single circuit board with magnetic components.

[0004] Figure 1 The figure shows a schematic diagram of an auxiliary power supply module in the prior art. The auxiliary power supply module 10 includes a circuit board 11, a primary circuit 12, a secondary circuit 13, a transformer 14, multiple first auxiliary power supply circuits 15, multiple second auxiliary power supply circuits 16, multiple output pins 17, and a signal transmission unit 18. It should be understood that the number of first auxiliary power supply circuits 15, second auxiliary power supply circuits 16, and output pins 17 is for illustration only.

[0005] Because the auxiliary power module needs to power various electrical components in the main power module, such as the power tube driver, control chip, and fan, it often needs to provide voltages with different reference grounds. Therefore, the number of auxiliary windings is relatively large, and accordingly, the number of output pins 17 of the auxiliary windings also increases. Because the distance between output pins 17 must meet safety regulations, the length of the circuit board 11 in the direction D1 is relatively large. Furthermore, the primary and secondary components of the auxiliary power supply also need to maintain a certain safety distance d. In particular, the greater the input voltage of the auxiliary power supply, the greater the required safety distance d between the primary and secondary components, which also increases the length of the circuit board 11 in the direction D1. All of these factors make it difficult to shorten the length L1 of the circuit board 11 in the direction D1, which in turn prevents further reduction in the size of the auxiliary power module. This increases the difficulty of layout for the auxiliary power module when the main circuit board of the main power module leaves insufficient space for the auxiliary power module along its length.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field.

[0007] Based on the above reasons, how to design an auxiliary power module with smaller size and higher power density has become a crucial issue. Utility Model Content

[0008] The purpose of the present invention is to provide an auxiliary power module to solve and improve the problems and shortcomings of the aforementioned technologies.

[0009] In order to achieve the aforementioned objectives, the present invention provides an auxiliary power supply module for supplying power to a main power supply module. The auxiliary power supply module includes a first submodule, a second submodule, a transformer, and a connector. The first submodule includes a first circuit board and a primary circuit disposed on the first circuit board, at least one first auxiliary power supply circuit, and a plurality of pins. The second submodule includes a second circuit board and a secondary circuit disposed on the second circuit board, at least one second auxiliary power supply circuit, and a plurality of pins. The transformer is disposed on the first circuit board or the second circuit board. The connector is disposed between the first submodule and the second submodule for transmitting electrical signals between the first circuit board and the second circuit board. The first submodule and the second submodule are disposed side by side on the main power supply module along a first direction.

[0010] According to one embodiment of the present invention, a plurality of pins of the first submodule and a plurality of pins of the second submodule are inserted into a main circuit board of the main power module.

[0011] According to one embodiment of the present invention, the multiple pins of the first submodule include at least one first pin, and at least one first auxiliary power supply circuit supplies power to the electrical components of the primary circuit of the main power module through the first pin; the multiple pins of the second submodule include at least one second pin, and at least one second auxiliary power supply circuit supplies power to the electrical components of the secondary circuit of the main power module through the second pin.

[0012] According to one embodiment of the present invention, the transformer is a planar transformer, and the primary winding, secondary winding and multiple auxiliary windings of the planar transformer are all arranged in a first circuit board, or the primary winding, secondary winding and multiple auxiliary windings of the planar transformer are all arranged in a second circuit board.

[0013] According to one embodiment of the present invention, the first auxiliary power supply circuit and the second auxiliary power supply circuit are respectively electrically connected to one of the plurality of auxiliary windings.

[0014] According to one embodiment of the present invention, the first auxiliary power supply circuit on the first circuit board is electrically connected to the corresponding auxiliary winding through a connector.

[0015] According to one embodiment of the present invention, the second submodule further includes at least one first auxiliary power supply circuit, which is arranged on the second circuit board, and the second circuit board further includes at least one third pin. The first auxiliary power supply circuit on the second circuit board supplies power to the electrical components of the primary circuit of the main power module through at least one third pin.

[0016] According to one embodiment of the present invention, the transformer is arranged on the second circuit board, the primary circuit and the first auxiliary power supply circuit on the first circuit board are located on the first surface of the first circuit board, and the secondary circuit and the second auxiliary power supply circuit on the second circuit board are located on the third surface and / or fourth surface of the second circuit board, wherein the second surface of the first circuit board is opposite to the third surface of the second circuit board.

[0017] According to one embodiment of the present invention, the transformer is disposed on the second circuit board, and the first circuit board further includes an opening, in which a portion of the magnetic core of the transformer is accommodated.

[0018] According to one embodiment of the present invention, the connector includes a plurality of connectors, each of which is a plug-in pin, a surface-welded pin, or a cable pin.

[0019] According to one embodiment of the present invention, the connector is implemented using a flexible circuit board.

[0020] According to one embodiment of the present invention, the flexible circuit board has connecting terminals at both ends, which are welded or plugged between the first circuit board and the second circuit board.

[0021] According to one embodiment of the present invention, the flexible circuit board is integrally formed with the first circuit board and the second circuit board to form a rigid-flexible board.

[0022] According to one embodiment of the present invention, the transformer is disposed on the second circuit board, and the number of layers of the first circuit board is smaller than the number of layers of the second circuit board.

[0023] According to one embodiment of the present invention, the auxiliary power module further includes a signal transmission unit, which is arranged on the first circuit board or the second circuit board, and is used to transmit a feedback signal generated according to the output signal of the secondary circuit on the second circuit board to the first circuit board.

[0024] According to one embodiment of the present invention, when the signal transmission unit is disposed on the first circuit board, the signal transmission unit receives feedback signals through a plurality of connectors.

[0025] According to one embodiment of the present invention, the auxiliary power module further includes an insulating pad disposed between the first submodule and the second submodule.

[0026] According to one embodiment of the present invention, the second submodule further includes a plurality of output capacitors disposed on the second circuit board.

[0027] The auxiliary power module of this utility model utilizes a dual-circuit board architecture, which increases space for electrical components and auxiliary windings within the module while simultaneously reducing its overall size, particularly its length. This facilitates application in applications with numerous auxiliary windings and limited space on the main circuit board. Furthermore, by varying the length of each circuit board, the module can flexibly accommodate different auxiliary power module installation spaces. Furthermore, the auxiliary power module of this utility model allows for the installation of more output capacitors on the second circuit board, thereby reducing output ripple. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a circuit block diagram of an auxiliary power supply module in the prior art.

[0029] Figure 2 It is a schematic diagram of the circuit board configuration of the auxiliary power module according to an embodiment of the utility model.

[0030] Figure 3 It is a side view of the circuit board configuration of the auxiliary power module according to an embodiment of the present utility model.

[0031] Figure 4 Schematic diagram of a dual circuit board deployed in an auxiliary power module according to another embodiment of the present invention.

[0032] Figure 5 Schematic diagram of a dual circuit board deployed in an auxiliary power module according to another embodiment of the present invention.

[0033] Figure 6 FIG. 1 is a schematic diagram of a first submodule in an auxiliary power module according to another embodiment of the present invention.

[0034] The description of the accompanying drawings is as follows:

[0035] 10: Auxiliary power module

[0036] 11: Circuit board

[0037] 12: Primary circuit

[0038] 13: Secondary circuit

[0039] 14: Transformer

[0040] 15: First auxiliary power supply circuit

[0041] 16: Second auxiliary power supply circuit

[0042] 17: Output pin

[0043] 18: Signal transmission unit

[0044] 100: Auxiliary power module

[0045] 200: First submodule

[0046] 201: First surface

[0047] 202: Second surface

[0048] 203: Opening

[0049] 20: First circuit board

[0050] 21: Primary circuit

[0051] 22, 35: First auxiliary power supply circuit

[0052] 23: First pin

[0053] 300: Second submodule

[0054] 301: Third surface

[0055] 302: Fourth Surface

[0056] 30: Second circuit board

[0057] 31: Secondary circuit

[0058] 32: Second auxiliary power supply circuit

[0059] 33: Second pin

[0060] 34: Transformer

[0061] 40: Signal transmission unit

[0062] 43: Third pin

[0063] 50: Connector

[0064] d: distance

[0065] D1: Length direction

[0066] D2: width direction

[0067] D3: thickness direction

[0068] L1, L2, L3: length DETAILED DESCRIPTION

[0069] Some typical embodiments of the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the description and drawings are intended to be illustrative in nature and not to limit the present invention.

[0070] It should be noted that while terms such as "first" and "second" may be used to describe different components / devices / circuits, these components / devices / circuits should not be limited by these terms. These terms are used solely to distinguish between different components / devices / circuits. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component without departing from the scope of the embodiments.

[0071] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features of the embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0072] See also Figure 2 、 Figure 3 and Figure 4 , Figure 2 A schematic diagram showing the circuit board configuration of the auxiliary power module according to an embodiment of the present invention is shown. Figure 3 A side view showing the circuit board configuration of the auxiliary power module according to an embodiment of the present invention, and Figure 4A schematic diagram of a dual-circuit board deployed in another embodiment of the present invention shows an auxiliary power module 100 electrically connected to an external main power module (not shown) and provides power to the main power module. The auxiliary power module 100 comprises a first submodule 200, a second submodule 300, a transformer 34, and a connector 50. The first and second submodules 200, 300 are arranged side by side on the main power module along a first direction (direction D3). The first submodule 200 comprises a first circuit board 20, a primary circuit 21, at least one first auxiliary power supply circuit 22, and a plurality of pins disposed thereon. The second submodule 300 comprises a second circuit board 30, a secondary circuit 31, at least one second auxiliary power supply circuit 32, and a plurality of pins disposed thereon. The transformer 34 can be disposed on either the first or second circuit board 20, 30. In this embodiment, the transformer 34 is disposed on the second circuit board 30. The connector 50 is used to electrically connect the first and second circuit boards 20, 30, and transmit electrical signals between the first and second circuit boards 20, 30. Multiple pins of the first circuit board 20 and the second circuit board 30 are inserted into the main circuit board (not shown) of the main power module, that is, the first circuit board 20 and the second circuit board 30 are perpendicular to the main circuit board of the main power module, so as to realize the electrical connection between the auxiliary power module 100 and the main power module.

[0073] The primary circuit 21 on the first circuit board 20 includes but is not limited to a power stage circuit and a primary control circuit; the secondary circuit 31 on the second circuit board 30 includes but is not limited to a rectifier circuit, a secondary control circuit and an output capacitor; the transformer 34 can be a planar transformer. When the transformer 34 is arranged on the second circuit board 30, the magnetic core of the transformer 34 is arranged on the second circuit board 30, and the primary winding, secondary winding and multiple auxiliary windings of the transformer 34 are arranged inside the second circuit board 30. In some embodiments, the primary winding, secondary winding and multiple auxiliary windings of the transformer 34 can be arranged in different layers of the second circuit board 30. In some embodiments, the primary winding of the transformer 34 can be arranged on the same layer as the secondary winding of the second circuit board 30, or the primary winding of the transformer 34 can be arranged on the same layer as at least one of the multiple auxiliary windings, or the secondary winding of the transformer 34 can be arranged on the same layer as at least one of the multiple auxiliary windings, or both the primary and secondary windings of the transformer 34 can be arranged on the same layer as at least one of the multiple auxiliary windings. In some embodiments, the transformer 34 can also be arranged on the first circuit board 20, and accordingly, the primary winding, secondary winding, and multiple auxiliary windings can be arranged similarly to the above scheme. Therefore, the number of layers of the first circuit board 20 and the second circuit board 30 can be different. When the transformer 34 is arranged on the second circuit board 34, since the transformer 34 is not arranged on the first circuit board 20, the number of layers of the first circuit board 20 can be smaller than that of the second circuit board 30. This allows the auxiliary power module to occupy less space in the thickness direction (direction D3), thereby reducing the overall size of the auxiliary power module. The following descriptions are all based on an example in which the transformer 34 is disposed on the second circuit board 30 .

[0074] The auxiliary power module has multiple auxiliary windings, each with a different number of turns, thereby providing different reference ground voltages for various components in the main power module. Furthermore, each of the first auxiliary power supply circuit 22 and the second auxiliary power supply circuit 32 is electrically connected to one of the auxiliary windings. Each of the first and second auxiliary power supply circuits 22, 32 may include a diode, a capacitor, and a resistor. When the transformer 34 is mounted on the second circuit board 30, the power stage circuit in the primary circuit 21 is electrically connected to the corresponding primary winding via the connector 50. Each of the first auxiliary power supply circuits 22 is electrically connected to the corresponding auxiliary winding via the connector 50. Each of the second auxiliary power supply circuits 32 is electrically connected to the corresponding auxiliary winding via internal wiring on the second circuit board 30.

[0075] Generally speaking, the main power supply module is often a multi-stage architecture including an isolation transformer. The side of the main power supply module connected to the input is defined as the primary circuit of the main power supply module, and the side of the main power supply module connected to the output is defined as the secondary circuit of the main power supply module. Accordingly, the pins on the first circuit board include a first pin 23, and the first auxiliary power supply circuit 22 on the first circuit board can be electrically connected to the primary circuit of the main power supply module through the first pin 23, and supply power to the electrical components of the primary circuit of the main power supply module; the pins on the second circuit board include a second pin 33, and the second auxiliary power supply circuit 32 on the second circuit board can be electrically connected to the secondary circuit of the main power supply module through the second pin 33, and supply power to the electrical components of the secondary circuit of the main power supply module.

[0076] In some embodiments, the number of devices that require auxiliary power supply in the primary circuit of the main power module is much greater than the number of devices that require auxiliary power supply in the secondary circuit of the main power module. Therefore, a larger number of first auxiliary power supply circuits need to be provided in the auxiliary power module. Figure 4 A first auxiliary power supply circuit 35 may also be provided on the second circuit board 30 to meet the power supply requirements of components in the primary circuit of the main power module. In this case, the second circuit board 30 includes a third pin 43, through which the first auxiliary power supply circuit 35 on the second circuit board 30 can supply power to the electrical components in the primary circuit of the main power module. It should be understood that if the number of components in the secondary circuit of the main power module requiring auxiliary power is significantly greater than the number of components in the primary circuit of the main power module requiring auxiliary power, a portion of the second auxiliary power supply circuit may also be provided on the first circuit board 20.

[0077] Furthermore, in order to optimize the design space of the auxiliary power supply module and reduce the overall size of the module in the thickness direction, when the transformer 34 is arranged on the second circuit board 30, the electrical components in the primary circuit 21 and the first auxiliary power supply circuit 22 can be arranged on the first surface 201 of the first circuit board 20, and the secondary circuit 31 and the second auxiliary power supply circuit 32 (and possible first auxiliary power supply circuit 35) can be arranged on the third surface 301 and / or fourth surface 302 of the second circuit board 30, wherein the second surface 202 of the first circuit board 20 and the third surface 301 of the second circuit board 30 are two opposite surfaces, that is, the first circuit board 20 has devices attached only on the first surface 201 away from the transformer 34; devices can be attached on both sides of the second circuit board 30.

[0078] The auxiliary power module 100 also includes a signal transmission unit 40, electrically connected to the primary circuit 21 and the secondary circuit 31, for transmitting a feedback signal generated based on the output signal of the secondary circuit 31 to the primary circuit 21, thereby generating a drive control signal for the switch in the primary circuit 21 and controlling the operation of the switch in the primary circuit 21. In some embodiments, when the signal transmission unit 40 is disposed on the first circuit board 20, it can be electrically connected to the secondary circuit on the second circuit board 30 via a connector 50, thereby receiving the feedback signal generated on the second circuit board 30 and transmitting it to the first circuit board 20.

[0079] Here, although Figure 4 The signal transmission unit 40 is shown as being disposed on the first circuit board 20 of the first submodule 200. However, depending on actual circumstances and needs, its location on the first circuit board can be changed, and it can also be disposed on the second circuit board 30 of the second submodule 300. Furthermore, the signal transmission unit 40 can be disposed on the first surface 201 of the first circuit board 20 in any position, or on the third surface 301 or fourth surface 302 of the second circuit board 30 in any position.

[0080] Furthermore, depending on the different distributions of the primary circuit 21, the secondary circuit 31, the first auxiliary power supply circuit 22, the second auxiliary power supply circuit 32 (and possible first auxiliary power supply circuit 35), the signal transmission unit 40, etc. on the first circuit board 20 and the second circuit board 30, the connector 50 can further have different implementations.

[0081] In some embodiments, such as Figure 3 As shown, connector 50 can comprise multiple connectors, each of which can be in the form of plug-in pins, surface-mount solder pins, or cable pins. In this implementation, corresponding connection points can be provided on first circuit board 20 and second circuit board 30, respectively, to achieve electrical connection via the multiple connectors. For example, solder joints can be provided to achieve electrical connection and signal transmission via soldering. It should also be noted that when providing connection points on the circuit boards, a certain insulation distance must be maintained between the components on the circuit boards and the connection points to comply with safety regulations.

[0082] In other embodiments, the connector 50 can be implemented using a flexible printed circuit board. In one embodiment, the flexible printed circuit board is provided with connecting terminals at both ends. Electrical connection between the two is achieved by connecting the two connecting terminals to the first and second printed circuit boards 20, 30, respectively, for example, by soldering or plugging. In another embodiment, the flexible printed circuit board can be combined with the first and second printed circuit boards 20, 30 through a lamination process and in accordance with relevant process requirements to form a rigid-flex board. For example, the flexible printed circuit board and the first and second printed circuit boards 20, 30 can be integrally formed to form a rigid-flex board that possesses the characteristics of both flexible and rigid printed circuit boards. When using this rigid-flex board approach, signals between the first and second printed circuit boards 20, 30 are transmitted via the connector 50 implemented using the flexible printed circuit board and the corresponding inner layers of the first and second printed circuit boards 20, 30. Therefore, there is no need to provide additional connection points (solder joints) on the surfaces of the first and second printed circuit boards 20, 30. This reduces the insulation distance between the components, helping to improve power density. Furthermore, since no manual installation is required, the manufacturing process is simplified.

[0083] In some embodiments, as Figure 5 As shown, the auxiliary power supply can also use primary-side feedback control, eliminating the need to feed back the secondary-side output signal to the primary side. Therefore, this embodiment can eliminate the need for a signal transmission unit. The connector 50 using this rigid-flex board format also has the advantages of increased power density, reduced labor requirements, and simplified manufacturing processes.

[0084] It should be noted that the implementation of the connector 50 of the present application is not limited to the above. Figure 3 、 Figure 4 、 Figure 5 Only a schematic layout of the connector 50 is given. In fact, the present application can select the type, quantity and setting position of the connector 50 according to actual needs. As long as it can realize signal transmission and / or electrical connection between the two circuit boards, it falls within the scope of protection of the present invention.

[0085] In some embodiments, the transformer 34 is disposed on the second circuit board 30, and the first circuit board 20 may include an opening, and a portion of the magnetic core of the transformer 34 can be accommodated in the opening, so that the magnetic core of the transformer 34 protruding on the third surface 301 of the second circuit board is accommodated in the opening, thereby further shortening the thickness between the two circuit boards.

[0086] See also Figure 6, which shows a schematic diagram of the first submodule in another embodiment of the present invention. In this embodiment, the transformer 34 is arranged on the second circuit board 30, and the first circuit board 20 further includes an opening 203, so that when the first submodule 200 and the second submodule 300 are arranged side by side, part of the magnetic core of the transformer 34 on the second circuit board 30 can be accommodated therein, that is, part of the magnetic core of the transformer 34 will be inserted into the opening 203. Since the transformer 34 on the second circuit board 30 has a certain thickness in the D3 direction, the spacing distance between the two circuit boards may not be further reduced. Therefore, by providing the opening 203 at the position corresponding to the transformer 34 on the first circuit board 20, the thickness of the auxiliary power module 100 in the D3 direction is not limited by the thickness of the transformer 34 in the D3 direction, which helps to further reduce the size of the auxiliary power module 100. It should be noted that the position of the opening on the first circuit board in the first submodule 200 is determined according to the position of the transformer in the second submodule 300 during actual implementation, and is not limited. Figure 6 As shown in the figure.

[0087] In some embodiments, the auxiliary power module may further include an insulating pad disposed between the first submodule 200 and the second submodule 300 to isolate the first circuit board 20 and the electrical components thereon from the second circuit board 30 and the electrical components thereon, thereby preventing mutual interference between the two circuit boards. In other words, the insulating pad is disposed between the second surface 202 of the first circuit board 20 and the third surface 301 of the second circuit board 30.

[0088] As can be seen from the above structure, the auxiliary power module 100 of the present invention utilizes a dual-board, side-by-side architecture, unlike the single-board architecture of the prior art. This architecture is primarily due to the fact that, generally speaking, the auxiliary power module is placed near the output of the main power module. However, the main power module's main circuit board typically has limited length space in the D1 direction, leaving some space in the D3 direction (i.e., the thickness direction). Therefore, the present invention compensates for the reduced space for electrical components and pin layouts caused by shortening the D1 direction by increasing the number of circuit boards and utilizing the space in the D3 direction (i.e., the thickness direction).

[0089] With this architecture, the required electrical components can be distributed across two circuit boards, thereby reducing the length of the circuit boards in the D1 direction and the overall size of the auxiliary power module. Furthermore, the two-circuit board design increases the space available for pin placement, which is particularly helpful when there are many auxiliary windings, effectively overcoming the limitation on the number of pins that can be placed within the D1 length in a single-board architecture. Furthermore, the addition of a second circuit board further increases the layout space for electrical components compared to conventional single-board auxiliary power modules. This allows for more output capacitors, thereby reducing output ripple and improving module performance. Finally, depending on the layout of other components surrounding the auxiliary power module 100, the length L2 of the first circuit board 20 in the D1 direction and the length L3 of the second circuit board 30 in the D1 direction can be made equal or different, providing greater application flexibility compared to conventional single-board architectures. For example, if the space surrounding the auxiliary power module 100 is blocked by components, the lengths of the two circuit boards in the D1 direction can be adjusted accordingly to avoid the components, which is a further advantage.

[0090] In summary, the present invention provides an auxiliary power module with a dual-layer circuit board architecture, which differs from existing designs. This architecture provides more space for the layout of electrical components and pins, effectively reducing the space occupied by the auxiliary power module in its longitudinal direction, thereby reducing the overall module size and increasing its power density. Furthermore, the dual-circuit board architecture provides greater flexibility in the auxiliary power module's configuration, allowing the length of each circuit board to be adjusted to suit the desired space.

[0091] It should be noted that the above are merely preferred embodiments for the purpose of illustrating the present invention. The present invention is not limited to the embodiments described. The scope of the present invention is determined by the scope of the attached patent application. Furthermore, the present invention may be modified in various ways by those skilled in the art without departing from the intended scope of the attached patent application.

Claims

1. An auxiliary power module for supplying power to a main power module, characterized in that: Include: A first submodule comprising: a first circuit board, a primary circuit, at least a first auxiliary power supply circuit, and a plurality of pins disposed on the first circuit board; a second submodule comprising: a second circuit board, a secondary circuit, at least a second auxiliary power supply circuit, and a plurality of pins disposed on the second circuit board; a transformer, disposed on the first circuit board or the second circuit board; and a connector, disposed between the first submodule and the second submodule, for transmitting electrical signals between the first circuit board and the second circuit board; The first submodule and the second submodule are arranged side by side on the main power module along a first direction.

2. The auxiliary power supply module according to claim 1, wherein: The plurality of pins of the first submodule and the plurality of pins of the second submodule are inserted into the main circuit board of the main power module.

3. The auxiliary power supply module according to claim 1, wherein: The multiple pins of the first submodule include at least one first pin, and the at least one first auxiliary power supply circuit supplies power to the electrical components of the primary circuit of the main power module through the first pin; the multiple pins of the second submodule include at least one second pin, and the at least one second auxiliary power supply circuit supplies power to the electrical components of the secondary circuit of the main power module through the second pin.

4. The auxiliary power supply module according to claim 1, wherein: The transformer is a planar transformer, and the primary winding, secondary winding and multiple auxiliary windings of the planar transformer are all arranged in the first circuit board, or the primary winding, secondary winding and multiple auxiliary windings of the planar transformer are all arranged in the second circuit board.

5. The auxiliary power supply module according to claim 4, wherein: The first auxiliary power supply circuit and the second auxiliary power supply circuit are respectively electrically connected to one of the plurality of auxiliary windings.

6. The auxiliary power supply module according to claim 5, characterized in that: The first auxiliary power supply circuit on the first circuit board is electrically connected to the corresponding auxiliary winding through the connector.

7. The auxiliary power supply module according to claim 1, wherein: The second submodule also includes at least one first auxiliary power supply circuit, which is arranged on the second circuit board, and the second circuit board also includes at least one third pin. The at least one first auxiliary power supply circuit on the second circuit board supplies power to the electrical components of the primary circuit of the main power supply module through at least one third pin.

8. The auxiliary power supply module according to claim 1, wherein: The transformer is arranged on the second circuit board, the primary circuit and the first auxiliary power supply circuit on the first circuit board are located on the first surface of the first circuit board, and the secondary circuit and the second auxiliary power supply circuit on the second circuit board are located on the third surface and / or fourth surface of the second circuit board, wherein the second surface of the first circuit board is opposite to the third surface of the second circuit board.

9. The auxiliary power supply module according to claim 1, wherein: The transformer is arranged on the second circuit board. The first circuit board further comprises an opening for accommodating a part of the magnetic core of the transformer in the opening.

10. The auxiliary power supply module according to claim 1, wherein: The connector includes a plurality of connecting parts, each of which is a plug-in type pin, a surface welding type pin, or a cable type pin.

11. The auxiliary power supply module according to claim 1, wherein: The connector is implemented using a flexible circuit board.

12. The auxiliary power supply module according to claim 11, wherein: The flexible circuit board has connecting terminals at both ends, which are welded or plugged between the first circuit board and the second circuit board.

13. The auxiliary power supply module according to claim 11, wherein: The flexible circuit board is integrally formed with the first circuit board and the second circuit board to form a rigid-flexible board.

14. The auxiliary power supply module according to claim 1, wherein: The transformer is arranged on the second circuit board, and the number of layers of the first circuit board is smaller than that of the second circuit board.

15. The auxiliary power supply module according to claim 1, wherein: The auxiliary power module further includes a signal transmission unit, which is disposed on the first circuit board or the second circuit board and is used to transmit a feedback signal generated according to an output signal of the secondary circuit on the second circuit board to the first circuit board.

16. The auxiliary power supply module according to claim 15, characterized in that: When the signal transmission unit is disposed on the first circuit board, the signal transmission unit receives the feedback signal through the connector.

17. The auxiliary power supply module according to claim 1, wherein: The auxiliary power module further includes an insulating pad disposed between the first submodule and the second submodule.

18. The auxiliary power supply module according to claim 1, wherein: The second submodule further includes a plurality of output capacitors disposed on the second circuit board.

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