TWI612749B - Circuit board module for induction type power supply system - Google Patents

Abstract

A circuit board module for an inductive power supply includes a first circuit board and a second circuit board. The first circuit board is used to carry a power supply module of an inductive power supply, and includes: a power supply coil area including a power supply coil, a main power area including a power supply driving unit, and a core including a power supply end processor A processing area, a power conversion area including one of the power conversion circuits, and a functional area including a port. The second circuit board is used to carry a power receiving module of the inductive power supply. The second circuit board includes a power receiving coil area including a power receiving module, a rectifying area including a rectifier, and a voltage stabilizing area including a voltage regulator. And a computing area containing a processor at the receiving end. Each region of the first circuit board is independent, and each region of the second circuit board is independent.

Description

Circuit board module of inductive power supply

The present invention relates to a circuit board module, and more particularly to a circuit board module that can be used in an inductive power supply.

With the popularity of portable electronic devices, such as mobile devices, smart phones, and tablet computers, the demand for charging devices continues to increase, especially for places that need to provide charging. In addition, since most people want to reduce the annoying wires as much as possible, inductive wireless charging technology came into being. Inductive wireless charging technology is widely used in various electric-powered devices, such as mobile devices, computers, electronic instruments, electric vehicles, and so on. For example, an inductive power supply can be applied to an automatic truck in a factory. For example, the power supply terminal is located at a fixed point on the ground, and the power receiving terminal is located at the bottom of the automatic truck and connected to the battery or power storage device on the vehicle. When the automatic truck is parked at the position of the power supply terminal, it can be charged. The above charging method can replace the traditional charging method using a brush. Because the brush needs to contact the metal contacts on the automatic truck when charging, it is easy to generate dust and it is difficult to maintain the dust-free environment of the factory. In this case, wireless charging meets This increases the charging requirements inside the factory.

Generally speaking, an inductive power supply includes a power supply end and a power reception end. The power supply end drives the power supply coil to resonate through a driving circuit, and then emits radio frequency electromagnetic waves. The electromagnetic power is then converted through the power receiving coil to generate DC Power is supplied to the load device at the receiving end. The power supply end and the power reception end each have a circuit board, which can be used to carry circuit components and coils required for power supply operation. As the performance of the inductive power supply gradually improves and its functions increase, the amount of current that the circuit board needs to pass is increasing, and the calculations that need to be processed are becoming more and more complicated. Therefore, a high-efficiency inductive The circuit board of the power supply has become one of the goals of the industry.

Therefore, the main object of the present invention is to provide a circuit board module that can be used in an inductive power supply. The circuit board can adopt a modular design of partitions, and each area is provided with a module that can be used to achieve a specific function. To improve the performance of the inductive power supply.

The invention discloses a circuit board module for an inductive power supply, which includes a first circuit board and a second circuit board. The first circuit board can be used to carry a power supply module of the inductive power supply. The first circuit board includes a power supply coil area, a main power area, a core processing area, a power conversion area, and a functional area. The power supply coil area includes a power supply coil of one of the power supply modules. The main power area includes at least one power supply driving unit for driving the power supply coil. The core processing area includes a power supply processor for controlling the operation of the power supply module. The power conversion area includes a power conversion circuit for converting an input power of one of the power supply modules into a first power for the power supply processor. The functional area includes a port for connecting a fixture corresponding to the power supply module. The second circuit board can be used to carry a power receiving module of the inductive power supply. The second circuit board includes a power receiving coil area, a rectification area, a voltage stabilization area, and a computing area. The power receiving coil area includes a power receiving coil of one of the power receiving modules. The rectifying area includes a rectifier for receiving power from one of the power receiving coils. The voltage stabilization area includes a voltage regulator for outputting the power of the power receiving coil. The computing area includes a power receiving end processor for controlling the operation of the power receiving module. The power supply coil area, the main power area, the core processing area, the power conversion area, and the functional area of the first circuit board are independent of each other, and the power reception coil area, the rectification area, and the The voltage stabilization area and the operation area are independent of each other.

The invention also discloses a circuit board for carrying a power supply module of an inductive power supply. The circuit board includes a power supply coil area, a main power area, a core processing area, a power conversion area and a function area. . The power supply coil area includes a power supply coil of one of the power supply modules. The main power area includes at least one power supply driving unit for driving the power supply coil. The core processing area includes a power supply processor for controlling the operation of the power supply module. The power conversion area includes a power conversion circuit for converting an input power of one of the power supply modules into a first power for the power supply processor. The functional area includes a port for connecting a fixture corresponding to the power supply module. The power supply coil area, the main power area, the core processing area, the power conversion area, and the functional area are independent of each other.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a circuit board 10 according to an embodiment of the present invention. The circuit board 10 is used to carry a power supply module of an inductive power supply. As shown in FIG. 1, the circuit board 10 includes a power supply coil area 102, a main power area 104, a core processing area 106, a power conversion area 108, and a function area 110. When the power supply terminal of the inductive power supply is operating, the circuit board 10 can receive power and ground voltage from a power input terminal 130 and a ground input terminal 140, respectively. The power supply coil region 102 includes a power supply coil and a capacitor. The main power area 104 includes at least one power supply driving unit for driving the power supply coil. The core processing area 106 includes a power supply processor, which can be used to control the operation of the power supply module. The power conversion area 108 includes a power conversion circuit for converting an input power of one of the power supply modules to a power that can be provided to a processor at the power supply end. The function area 110 is used for various functions, such as providing a light warning or connecting external devices. The circuit board 10 may be any type of circuit board, such as a printed circuit board (Printed Circuit Board, PCB), and is not limited thereto. In addition, the components at the power supply end of the inductive power supply can be disposed on the circuit board 10 by soldering or other methods. In addition, in order to realize the internal signal transmission of the power supply module, the circuit board 10 may be a multi-layer circuit board, which may include a structure of two layers, three layers, or more than four layers, depending on actual needs.

For example, the functional area 110 may include a port 120 for connecting a fixture corresponding to the power supply module. The jig may be implemented on another circuit board 15, but is not limited thereto. The circuit board 15 is provided with a row of metal interfaces. Correspondingly, the port 120 may also include a row of metal interfaces, which can be formed by cutting the surface of the circuit board 10. Therefore, the circuit board 10 does not need to be provided with an additional connector (such as a Universal Serial Bus (USB) connector), and can be connected to an external fixture through a metal interface, thereby saving component costs. During the product development process of the inductive power supply, the product developer can connect a fixture (such as the circuit board 15) to the circuit board 10 for function setting and testing. In the process of using the product, it is only necessary to set the circuit board 10 inside the product without adding a jig. If the product needs to be repaired or updated, it can be connected with a fixture (such as circuit board 15) for processing. In this case, any devices and components that are not needed during product operation, such as display screens, control buttons, switches, etc., can be set on the fixture, which can significantly reduce the product's mother circuit board (ie, circuit board 10). Cost. In this way, some setting functions only need to be operated when necessary, and additional expanded functions can be obtained without increasing product costs.

In an embodiment, when the circuit board 10 is to be connected to the jig, the jig can be clamped to the port 120 through a row of pins, so that the jig is electrically connected to the circuit board 10 and can be accessed through the pins. Send data or signals. In this example, the fixture includes a display screen 150 for displaying information to be provided to a user or a product developer. The above information may include the results of system detection (such as temperature, voltage, current, frequency, power, etc.) and / or mode setting information, but is not limited to this. In addition, the fixture can also include other buttons or switches for setting, or connectors for connecting with other external devices. For example, a USB connector can be set on the fixture, so that the computer can use the The USB connector is connected to the circuit board 10 through a jig for system setting or testing. The above settings may include modifying / adjusting one or more settings of the inductive power supply. For example, the inductive power supply may include an overvoltage protection function, and the user may adjust the threshold value of the overvoltage protection through a fixture. . Those with ordinary knowledge in the art should understand various parameter settings to be performed by the inductive power supply, and the parameter content set through the fixture should not be a limitation of the present invention.

In addition, the function area 110 may further include other additional functions. For example, in some embodiments, the functional area 110 may include a display device for displaying the status of the inductive power supply. In some embodiments, the function area 110 may also include a warning device for providing a warning function. For example, the warning device may notify the user that the temperature of the inductive power supply is too high, or notify the user that the inductive power supply is approaching Or meet the conditions of forced power off. For example, the function area 110 may include a light emitting diode (LED) for generating a light signal for status display, and the function area 110 may also include a buzzer to reach a certain level when the inductive power supply reaches a certain level. An alarm sounds in this state to alert the user.

As shown in FIG. 1, the circuit board 10 is divided into a plurality of regions, each of which is responsible for its own function. Among them, each region can receive a different power source, and the ground terminals of each region are separated from each other, only in the circuit board. A small part of the layers are connected. In detail, since the main purpose of the inductive power supply is to supply power, the power supply coil area 102 and the main power area 104 both need to drive a larger current, which is prone to generate large noise. On the other hand, the core processing area 106 is used for processing more complicated operations and needs high-speed operation, which cannot bear the influence of large noise. In this case, separating the ground terminals of each area from each other can reduce noise interference between different areas.

As described above, the main power region 104 includes at least one power supply driving unit, which can be used to drive the power supply coil to operate. In one embodiment, the main power area 104 includes two power supply driving units D1 and D2, as shown in FIG. 1. Preferably, the power supply driving units D1 and D2 may be symmetrically disposed in the main power area 104 and respectively coupled to both ends of the power supply coil for full-bridge driving. In detail, the driving circuit of the power supply coil can adopt a fully balanced design, that is, the driving circuit and the arrangement of components at both ends of the power supply coil can be completely symmetrical. In detail, the power supply coil can be implemented by a C-L-C structure, that is, a capacitor is coupled to both sides of the coil, and then connected to the power supply driving units D1 and D2 which are symmetrical to each other. In order to effectively utilize the space of the circuit board 10, the capacitor may be disposed on the back of the circuit board 10, and thus is not shown in the first figure. In addition, the front ends of the power supply driving units D1 and D2, that is, the path of the power input terminal 130 connected to the power supply driving units D1 and D2 also adopt a fully balanced design. In detail, a length of a wire path of the power input terminal 130 connected to the power supply driving unit D1 is equal to or close to a length of a wire path of the power input terminal 130 connected to the power supply driving unit D2. In an embodiment, the wire connected to the power input terminal 130 may first extend to a node N1, and then the node N1 is respectively connected to the power supply driving units D1 and D2 through two wires, thereby achieving equal wire path lengths. It should be noted that in FIG. 1, for the convenience of description, the wires are represented by a thin line; however, the wires actually arranged on the circuit board 10 may have any width, and because the power input terminal 130 needs to provide sufficient driving power The coil outputs a large current of electricity, so the width design of the above-mentioned wire needs to be sufficient to support the corresponding current strength. In some embodiments, the wires used to transmit large currents can also be extended to the lower layer of the circuit board 10 (for example, any combination of the second layer and the layers below the second layer), to improve the current transmission performance in a multi-layer simultaneous transmission manner. It should be noted that the wires connecting the node N1 to the power supply driving units D1 and D2 need to be the same length and width to achieve a fully balanced design.

In addition, the design of the ground wire can also adopt a fully balanced design. In detail, a length of a wire path of the ground input terminal 140 connected to the power supply driving unit D1 is equal to or close to a length of a wire path of the ground input terminal 140 connected to the power supply driving unit D2. In one embodiment, the wires connected to the ground input 140 may pass through a first through hole from the first layer (ie, the uppermost layer) of the circuit board 10 to reach the lower layer (such as the second layer and the second layer) of the circuit board 10 Any combination of the following layers), extends to a node N2 in the lower layer and passes through a second through hole from the node N2 to return to the first layer, and then connects to the power supply driving unit D1 and D2, by which the length of the wire path is equal. Similarly, the wires used to pass the ground signal in FIG. 1 may have any width, and the dotted lines represent that the wires are transmitted through the lower layer of the circuit board 10. In this example, the coils of the power supply coil area 102 and the power supply drive units D1 and D2 of the main power area 104 are connected through the wires of the first layer of the circuit board 10, so the ground wire needs to pass through the lower layer to reach the node N2. In one embodiment, the ground wire can be transmitted on the second layer and the third layer at the same time, which can improve the strength of the ground signal. It should be noted that the above-mentioned ground wire configuration method is only one of the many embodiments of the present invention. In other embodiments, the ground wire configuration may also be performed through other methods, such as transmitting a ground signal through the first layer of the circuit board 10. Without being limited to this, only the wire path of the ground input terminal 140 connected to the power supply drive unit D1 needs to be the same length as the wire path of the ground input terminal 140 connected to the power supply drive unit D2 to achieve a fully balanced design, and then to achieve full bridge power supply Driven balance.

On the other hand, safety protection is a necessary main function of the inductive power supply. Since the components of the main power area 104 need to drive a large voltage and current, it is easy to generate heat. Therefore, the main power area 104 needs to occupy a large area on the circuit board 10 to achieve a good heat dissipation effect. In addition, a temperature sensor can also be provided on the path through which the main current passes (including the main power area 104 and the power supply coil area 102) to improve the safety of the inductive power supply.

Please continue to refer to FIG. 1. The core processing area 106 includes a power supply processor. As mentioned above, the core processing area 106 is used to process more complex operations and requires high-speed operation. It cannot tolerate the effects of large noise. Therefore, the core processing area 106 is independent of other areas and its ground terminal is isolated from the ground terminals of other areas as much as possible. In addition, in the core processing area 106, high-speed signal processing can be divided into a digital area and an analog area, and the ground ends of the two can also be isolated from each other to avoid noise interference. Since the high-speed signal is susceptible to noise interference and other signals, the core processing area 106 needs to be configured as an independent area, and the path of the high-speed signal line needs to be shortened as much as possible to avoid interference.

The power conversion area 108 includes a power conversion circuit that can be used for voltage conversion to convert the power at the power input terminal 130 into a voltage that can be used for various circuit elements in the power supply module. In one embodiment, the power supply voltage input from the power input terminal 130 is 24V, the voltage required for the operation of the main power region 104 is 5V, and the voltage required for the operation of the core processing region 106 is 3.3V. In this case, the power conversion region 108 may include a plurality of power conversion circuits for performing conversion. Preferably, the power conversion circuit in the power conversion area 108 includes a switching power conversion circuit and a linear power conversion circuit. For example, the switching power conversion circuit may be a buck converter. The power conversion circuit may be a low dropout regulator (LDO). The switching power conversion circuit can convert the 24V power input from the power input terminal 130 into a 5V power supply. This 5V power supply can be provided to the main power area 104 (such as the power supply drive units D1 and D2) and input to the linear power conversion. Circuit. Then, the linear power conversion circuit converts the 5V power into 3.3V power for the processor in the core processing area 106 to use.

The above-mentioned way of combining a switching power conversion circuit and a linear power conversion circuit for two-stage conversion can obtain the advantages of both. Because the voltage difference between 24V input power and 3.3V output power is large, if the linear power conversion circuit is used to directly convert the 24V power to 3.3V, the problem of poor conversion efficiency will occur; if the switching power conversion circuit is used to directly convert the 24V When the power is converted to 3.3V, the noise of the output power is too large to meet the needs of the processor's high-speed operation. The invention adopts a switch-type power conversion circuit to convert a 24V power supply to 5V, which can achieve high conversion efficiency; a linear power conversion circuit is used to convert a 5V power supply to 3.3V, which can filter noise at the input end, thereby generating good quality and noise Information small output power.

After the current enters the circuit board 10 from the power input terminal 130, most of the current will be conducted to the power supply coil area 102, which is used to push the power supply coil to generate wireless power. A wider wire needs to be provided on the circuit board 10 to pass this current. In addition, a smaller current branch is provided on the current path to connect to the power conversion area 108, and the converted current is provided to each circuit element on the circuit board 10 for use.

It is worth noting that the present invention provides the concept of circuit board partitioning. Each area on the circuit board 10 can be regarded as a module and independent of each other. Modularization makes it easier to modify and design the circuit board. For example, if an inductive power supply does not require the components of the functional area 110, the product developer can easily remove the functional area 110. Alternatively, if the processor and other components used in an inductive power supply can directly receive the voltage output from the power supply terminal, the power conversion circuit can also be omitted and the power conversion area 108 can be removed.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of another circuit board 20 according to an embodiment of the present invention. The circuit board 20 is used to carry a power receiving module of an inductive power supply. As shown in FIG. 2, the circuit board 20 includes a power receiving coil area 202, a rectification area 204, a voltage stabilization area 206, and an operation area 208. The power receiving coil area 202 includes a power receiving coil and capacitors C1 and C2, which are arranged in a C-L-C manner. In this example, in order to effectively utilize the space of the circuit board 20, the power receiving coil is disposed on the back of the circuit board 20 (not shown). The rectifying area 204 includes a rectifier for receiving power from the power receiving coil. The voltage stabilization region 206 includes a voltage regulator for outputting the rectified power. The computing area 208 includes a power receiving end processor, which can be used to control the operation of the power receiving module. Similarly, the circuit board 20 may be any type of circuit board, such as a printed circuit board. In addition, the components at the receiving end of the inductive power supply may be disposed on the circuit board 20 by welding or other methods. In addition, in order to realize the internal signal transmission of the power receiving module, the circuit board 20 may be a multi-layer circuit board, which may include a structure of two layers, three layers, or more than four layers, depending on actual needs.

Similar to the structure of the power supply module of the circuit board 10, the power receiving module in the circuit board 20 also adopts the concept of partitioning, that is, each area can be regarded as a module and independent of each other, which has the advantages of easy modification and design, and can isolate each Noise in the area.

It is worth noting that in the circuit board 20, after receiving the wireless power from the power receiving coil in the power receiving coil area 202, it will first reach the rectification area 204 for rectification and filtering, and then enter the voltage stabilization area 206 for voltage conversion and then output. The circuit board 20 is designed in such a manner that components that are liable to generate heat are relatively loosely arranged, and components that are not likely to generate heat are relatively tightly arranged. Since the current of the wireless power passes through the power receiving coil area 202, the rectification area 204, and the voltage stabilization area 206 in order, the circuit components in the above areas are loosely arranged, and the component density thereof is low to improve the heat dissipation effect. On the other hand, the operation area 208 is responsible for logic operations without passing a large current. The circuit board 20 is designed to increase the circuit element density of the operation area 208 as much as possible, thereby reducing the area of the circuit board.

From the above, it can be known that those with ordinary knowledge in the art can design the circuit boards of the power supply module and the power receiving module of the inductive power supply according to the structural diagrams and related descriptions of Figures 1 and 2 to achieve high efficiency. Circuit board module.

In summary, the present invention provides a circuit board module for an inductive power supply, which includes a circuit board for a power supply module and a circuit board for a power receiving module. In the circuit board of the power supply module, the devices and components that are not used during product operation can be set on the fixture to greatly reduce the cost of the circuit board. Each area of the circuit board can be regarded as a module and independent of each other. Modularization makes circuit board modification and design easier. In addition, the drive circuit of the power supply coil can adopt a fully balanced design, and the length of the wires from the power line and the ground line to the two drive circuits are all the same length to achieve the balance of the full-bridge power supply drive. On the other hand, in the circuit board of the power receiving module, the components that are easy to generate heat can be set loosely, and the components that are not easy to generate heat can be set closer to achieve a good heat dissipation effect. In this way, the circuit board design of the present invention improves current, noise, and heat dissipation at the same time, so that the inductive power supply has good performance. The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the scope of patent application of the present invention shall fall within the scope of the present invention.

10‧‧‧Circuit Board
102‧‧‧Power supply coil area
104‧‧‧Main power zone
106‧‧‧Core Processing Area
108‧‧‧Power Conversion Area
110‧‧‧function area
120‧‧‧Port
130‧‧‧Power input
140‧‧‧ ground input
D1, D2‧‧‧ Power supply drive unit
N1, N2‧‧‧nodes
15‧‧‧Circuit Board
150‧‧‧display
20‧‧‧Circuit Board
202‧‧‧Power receiving coil area
204‧‧‧rectification zone
206‧‧‧Regulation zone
208‧‧‧ Computing Area
C1, C2‧‧‧capacitor

FIG. 1 is a schematic diagram of a circuit board for a power supply module according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a circuit board for a power receiving module according to an embodiment of the present invention.

10‧‧‧Circuit Board

102‧‧‧Power supply coil area

104‧‧‧Main power zone

106‧‧‧Core Processing Area

108‧‧‧Power Conversion Area

110‧‧‧function area

120‧‧‧Port

130‧‧‧Power input

140‧‧‧ ground input

D1, D2‧‧‧ Power supply drive unit

N1, N2‧‧‧nodes

15‧‧‧Circuit Board

150‧‧‧display

Claims (29)

A circuit board module for an inductive power supply includes: a first circuit board for carrying a power supply module of the inductive power supply; the first circuit board includes: a power supply coil A main power area includes at least one power supply driving unit for driving the power supply coil; a core processing area includes a power supply end processor for controlling the power supply module The operation of the group; a power conversion area including a power conversion circuit for converting an input power of the power supply module into a first power for the power supply processor; and a functional area including a A port for connecting a jig corresponding to the power supply module; and a second circuit board for carrying a power receiving module of the inductive power supply, the second circuit board includes: a power receiving coil area Including a power receiving coil of the power receiving module; a rectifying area including a rectifier for receiving a power source from the power receiving coil; a voltage stabilization area including a stable power A voltage unit for outputting the power of the power receiving coil; and a computing area including a power receiving end processor for controlling the operation of the power receiving module; wherein the power supply coil area of the first circuit board, the main The power area, the core processing area, the power conversion area and the functional area are independent, and the power receiving coil area, the rectification area, the voltage stabilization area and the operation area of the second circuit board are independent. The circuit board module according to claim 1, wherein the first circuit board and the second circuit board are both a printed circuit board (PCB). The circuit board module according to claim 1, wherein the port includes a row of metal interfaces formed by cutting on the surface of the first circuit board. The circuit board module according to claim 3, wherein the jig is clamped to the row of metal interfaces through a row of pins, so that the port is connected to the jig. The circuit board module according to claim 1, wherein when the jig is connected to the port, it is used to adjust a set value of the inductive power supply. The circuit board module according to claim 1, wherein the ground ends of the power supply coil area, the main power area, the core processing area, the power conversion area, and the functional area are separated from each other. The circuit board module according to claim 1, wherein the power conversion circuit includes a switching power conversion circuit and a linear power conversion circuit. The circuit board module according to claim 7, wherein the switching power conversion circuit converts the input power to a second power, and the linear power conversion circuit converts the second power to the first power. The circuit board module according to claim 8, wherein the second power source is provided for use in the main power area. The circuit board module according to claim 1, wherein the functional area includes at least one of a display device and a warning device. The circuit board module according to claim 1, wherein the at least one power supply driving unit includes a first power supply driving unit and a second power supply driving unit. The circuit board module according to claim 11, wherein a power supply terminal of the power supply module is connected to a wire path length of the first power supply driving unit is equal to or close to the power input terminal connected to the second power supply driver A wire path length of a unit, and a ground path of a power supply module connected to a first power drive unit is equal to or close to a wire path of the ground input end connected to a second power drive unit length. The circuit board module according to claim 12, wherein a wire connected to the power input terminal extends to a node, and then the node is connected to the first power supply drive unit and the second power supply drive unit through two wires, respectively. The distance between the node and the first power supply driving unit is equal to or close to the distance between the node and the second power supply driving unit. The circuit board module according to claim 12, wherein a wire connected to the ground input terminal passes through a first through hole from a first layer of the first circuit board to a second layer of the first circuit board , Which extends to a node of the second layer and passes through a second through hole to return to the first layer, and then the second through hole is connected to the first power supply driving unit and the first through two wires respectively. Two power supply driving units, wherein the distance between the node and the first power supply driving unit is equal to or close to the distance between the node and the second power supply driving unit. The circuit board module according to claim 1, wherein the arrangement density of the circuit components in the rectification area and the arrangement density of the circuit components in the voltage stabilization area are lower than the arrangement density of the circuit components in the operation area, respectively. A circuit board is used to carry a power supply module of an inductive power supply. The circuit board includes: a power supply coil area containing a power supply coil of the power supply module; a main power area containing a drive unit; At least one power supply driving unit of the power supply coil; a core processing area including a power supply end processor for controlling the operation of the power supply module; a power conversion area including a power conversion circuit for the power supply module An input power source is converted into a first power source for use by the power supply processor; and a functional area includes a port for connecting a jig corresponding to the power supply module; wherein the power supply coil area The main power area, the core processing area, the power conversion area and the functional area are independent of each other. The circuit board according to claim 16, wherein the circuit board is a printed circuit board (Printed Circuit Board, PCB). The circuit board according to claim 16, wherein the port includes a row of metal interfaces formed by cutting on the surface of the circuit board. The circuit board according to claim 18, wherein the jig is clamped to the row of metal interfaces through a row of pins, so that the port is connected to the jig. The circuit board according to claim 16, wherein the fixture is used to adjust a set value of the inductive power supply when the fixture is connected to the port. The circuit board according to claim 16, wherein the ground terminals of the power supply coil area, the main power area, the core processing area, the power conversion area, and the functional area are separated from each other. The circuit board according to claim 16, wherein the power conversion circuit includes a switching power conversion circuit and a linear power conversion circuit. The circuit board according to claim 22, wherein the switching power conversion circuit converts the input power to a second power, and the linear power conversion circuit converts the second power to the first power. The circuit board according to claim 23, wherein the second power source is provided for use in the main power area. The circuit board according to claim 16, wherein the functional area includes at least one of a display device and a warning device. The circuit board according to claim 16, wherein the at least one power supply driving unit includes a first power supply driving unit and a second power supply driving unit. The circuit board according to claim 26, wherein a power supply terminal of the power supply module is connected to a wire path length of the first power supply driving unit is equal to or close to a length of the power input terminal connected to the second power supply driving unit. A wire path length, and a wire path length of a ground input terminal of the power supply module connected to the first power supply drive unit is equal to or close to a wire path length of the ground input terminal connected to the second power supply drive unit. The circuit board according to claim 27, wherein a wire connected to the power input terminal extends to a node, and then the node is respectively connected to the first power supply driving unit and the second power supply driving unit through two wires, wherein the The distance between the node and the first power supply driving unit is equal to or close to the distance between the node and the second power supply driving unit. The circuit board according to claim 27, wherein a wire connected to the ground input terminal passes through a first through hole from a first layer of the circuit board to a second layer of the circuit board and extends to the second layer A node of the layer passes through a second through hole to return to the first layer, and the second through hole is respectively connected to the first power supply driving unit and the second power supply driving unit through two wires. , The distance between the node and the first power supply driving unit is equal to or close to the distance between the node and the second power supply driving unit.