Power converter

Abstract

A power converter includes a control board, at least two drive boards and a power conversion circuit, wherein the at least two drive boards include a first drive board and a second drive board, a controller in the control board is coupled with a control output port and outputs at least two-phase control signals via the control output port; the at least two-phase control signals include a first-phase control signal and a second-phase control signal; the first drive board is coupled with the control output port and receives the at least two-phase control signals; the first drive board generates a first-phase drive signal to a first-phase bridge arm according to the first-phase control signal and outputs the second-phase control signal to the second drive board; the second drive board is coupled with the first drive board and receives the second-phase control signal; the second drive board generates a second-phase drive signal to a second-phase bridge arm according to the second-phase control signal. The above scheme does not need to use a long signal line to realize the connection between the drive board and the control board, reduces the system complexity, and does not introduce additional electromagnetic interference.

Description

Technical Field

[0001] This utility model relates to the field of power converter technology, and in particular to a power converter. Background Technology

[0002] In power converter design, signal transmission between the control board and the driver board typically uses a one-to-one physical connection. Specifically, the control board has three independent control output ports, which are connected to the corresponding interfaces on the three-phase (A-phase, B-phase, and C-phase) driver boards, respectively.

[0003] However, in some applications, limitations in installation space or structural layout necessitate the use of longer signal cables to connect to the control board. However, longer signal cables increase system complexity and introduce additional electromagnetic interference, affecting signal integrity and transmission efficiency. Utility Model Content

[0004] In view of this, this application provides a power converter that eliminates the need for long signal lines to connect the driver board and the control board, reducing system complexity and avoiding the introduction of additional electromagnetic interference.

[0005] To solve the above problems, the technical solution provided in this application is as follows:

[0006] In a first aspect of this application, an embodiment of the present invention provides a power converter, comprising: a control board, at least two drive boards, and a power conversion circuit, wherein the at least two drive boards include a first drive board and a second drive board, and the power conversion circuit includes a first phase bridge arm and a second phase bridge arm, wherein: the control board includes a controller and a control output port, the controller being coupled to the control output port and outputting at least two phase control signals via the control output port; the at least two phase control signals include a first phase control signal and a second phase control signal; the first drive board, coupled to the control output port, receives the at least two phase control signals; the first drive board generates a first phase drive signal to the first phase bridge arm according to the first phase control signal, and outputs the second phase control signal to the second drive board; the second drive board, coupled to the first drive board, receives the second phase control signal; the second drive board generates a second phase drive signal to the second phase bridge arm according to the second phase control signal.

[0007] Optionally, the first driver board includes: a first phase drive circuit, a first drive port, and a second drive port, wherein: the first drive port is coupled to the control output port and includes at least two signal terminals to receive the at least two phase control signals; the first phase drive circuit is coupled to the first signal terminal among the at least two signal terminals to generate a first phase drive signal according to the first phase control signal; the second drive port is coupled to the other signal terminals among the at least two signal terminals besides the first signal terminal to output the second phase control signal.

[0008] Optionally, the second driver board includes: a second phase driving circuit and a third driving port, wherein: the third driving port is coupled to the second driving port of the first driver board, includes at least one signal terminal, and receives the second phase control signal; the second phase driving circuit is coupled to the third driving port and generates the second phase driving signal according to the second phase control signal.

[0009] Optionally, the at least two drive boards further include a third drive board, the power conversion circuit further includes a third phase bridge arm, and the at least two phase control signals further include a third phase control signal; the first drive board further outputs the third phase control signal to the second drive board; the second drive board further outputs the third phase control signal to the third drive board; the third drive board is coupled to the second drive board and receives the third phase control signal; the third drive board generates a third phase drive signal to the third phase bridge arm according to the third phase control signal.

[0010] Optionally, the first driver board includes: a first phase drive circuit, a first drive port, and a second drive port, wherein: the first drive port is coupled to the control output port and includes three signal terminals to receive three-phase control signals; the first phase drive circuit is coupled to the first signal terminal of the first drive port and generates a first phase drive signal according to the first phase control signal; the second drive port includes two signal terminals, which are respectively coupled to the second output terminal and the third output terminal of the first drive port, and output the second phase control signal and the third phase control signal.

[0011] Optionally, the second driver board includes: a second phase drive circuit, a third drive port, and a fourth drive port, wherein: the third drive port is coupled to the second drive port of the first driver board and includes two signal terminals; the second phase drive circuit is coupled to the first signal terminal of the third drive port and generates the second phase drive signal according to the second phase control signal; the fourth drive port includes one signal terminal and is coupled to the second signal terminal of the third drive port, and outputs the third phase control signal.

[0012] Optionally, the third driving board includes: a third-phase driving circuit and a fifth driving port, wherein: the fifth driving port is coupled to the fourth driving port and includes a signal terminal; the third-phase driving circuit is coupled to the signal terminal of the fifth driving port and generates the third-phase driving signal according to the third-phase control signal.

[0013] Optionally, the first drive board, the second drive board, and the third drive board have the same structure.

[0014] Optionally, any driver board includes a driver circuit and two driver ports, each driver port including at least three signal terminals, at least a portion of the at least three signal terminals of each driver port being used for control signal transmission.

[0015] Optionally, the signal terminals in each drive port other than those used for control signal transmission can be used as ground terminals.

[0016] In this embodiment, the control board outputs at least two-phase control signals via a control output port, and the first driver board is coupled to the control output port to receive the at least two-phase control signals. The first driver board generates a first-phase drive signal based on the first-phase control signal and outputs it to the first-phase bridge arm. The first driver board then outputs a second-phase control signal to the second driver board. The second driver board receives the second-phase control signal, generates a second-phase drive signal, and outputs it to the second-phase bridge arm. Thus, other phase control signals (such as the second-phase control signal) are forwarded from the first driver board to other driver boards (such as the second driver board) without requiring direct connection between the other driver boards and the control board. This avoids the high system complexity caused by long signal lines between some driver boards and the control board, prevents the introduction of additional electromagnetic interference, and improves signal integrity and transmission efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram showing the connection between the control board and the driver board in a power converter.

[0018] Figure 2 This is a schematic diagram of the structure of a power converter according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of a power converter according to an embodiment of this utility model. Detailed Implementation

[0020] In existing power converter designs, signal transmission between the control board and the driver board typically uses a one-to-one physical connection. Specifically, the control board has three independent control output ports, which connect to the corresponding interfaces on the first-phase driver board, the second-phase driver board, and the third-phase driver board, respectively. In some scenarios, the first-phase driver board, the second-phase driver board, and the third-phase driver board can also be referred to as the A-phase driver board, the B-phase driver board, and the C-phase driver board.

[0021] However, in some application scenarios, due to limitations in installation space or structural layout, some driver boards cannot be directly connected to the control board, and it is necessary to extend the signal lines to achieve this.

[0022] Reference Figure 1 A schematic diagram of the connection between the control board and the driver board in a power converter is given. The control board includes a controller and three control output ports: JX1 port, JX2 port and JX3 port. The controller outputs the first phase control signal through the JX1 port, the second phase control signal through the JX2 port, and the third phase control signal through the JX3 port.

[0023] The driver board 1 includes an interface circuit J1, which is coupled to the JX1 port, receives the first phase control signal, and outputs it to the driver circuit 1. After being driven by the driver circuit 1, the first phase drive signal is output.

[0024] The driver board 2 includes an interface circuit J2, which is coupled to the JX2 port. It receives the second phase control signal and outputs it to the driver circuit 2. After being driven by the driver circuit 2, it outputs the second phase drive signal.

[0025] The driver board 3 includes an interface circuit J3, which is coupled to the JX3 port. It receives the third-phase control signal and outputs it to the driver circuit 3. After being driven by the driver circuit 3, it outputs the third-phase drive signal.

[0026] In some application scenarios, the aforementioned first-phase drive signal, second-phase drive signal, and third-phase drive signal can be input to a power conversion circuit, which may include a first-phase bridge arm, a second-phase bridge arm, and a third-phase bridge arm. Specifically, the aforementioned first-phase drive signal can be input to the first-phase bridge arm, the second-phase drive signal can be input to the second-phase bridge arm, and the third-phase drive signal can be input to the third-phase bridge arm.

[0027] The aforementioned drive board 1 can also be called the first phase drive board, drive board 2 can also be called the second phase drive board, and drive board 3 can also be called the third phase drive board.

[0028] like Figure 1As shown, due to limitations in installation space or structural layout, relatively long signal cables are required to connect driver boards 2 and 3 to the control board. However, longer signal cables increase system complexity. Furthermore, longer signal cables introduce additional electromagnetic interference (EMI), affecting signal integrity and transmission efficiency.

[0029] In this embodiment of the invention, the first driver board forwards other phase control signals to other driver boards without directly connecting the other driver boards to the control board. This avoids the high system complexity caused by long signal lines between some driver boards and the control board, does not introduce additional electromagnetic interference, and improves signal integrity and transmission efficiency.

[0030] To make the above-mentioned objectives, features and beneficial effects of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] This utility model provides a power converter, including: a control board, at least two drive boards, and a power conversion circuit, wherein the at least two drive boards include a first drive board and a second drive board, and the power conversion circuit may include a first phase bridge arm and a second phase bridge arm.

[0032] In a specific implementation, the control board may include a controller and a control output port. The controller may be coupled to the control output port, and output at least two-phase control signals via the control output port. The aforementioned at least two-phase control signals may include a first-phase control signal and a second-phase control signal.

[0033] In practical implementation, the controller can be a chip or chip module with data processing capabilities, such as a microcontroller (MCU), digital signal processor (DSP), or central processing unit (CPU), which can generate at least two-phase control signals and output them to the control output port.

[0034] In practical implementation, the first drive board can be coupled to the control output port on the control board to receive at least two phase control signals output by the controller. The first drive board can generate a first phase drive signal based on the first phase control signal and output the first phase drive signal to the first phase bridge arm. The first drive board can also output other phase control signals to the second drive board.

[0035] The second drive board can be coupled to the first drive board, receive the second phase control signal, generate the second phase drive signal according to the second phase control signal, and output the second phase drive signal to the second phase bridge arm. If at least two phase control signals also include other phase control signals (such as the third phase control signal, the fourth phase control signal, etc.), the other phase control signals can be output to the next drive board (such as the third drive board) connected to the second drive board.

[0036] Take the controller outputting two-phase control signals via the control output port as an example.

[0037] The power converter includes a first driver board, a second driver board, a first phase bridge arm, and a second phase bridge arm. The controller outputs a first-phase control signal and a second-phase control signal via a control output port. The first driver board receives the first-phase control signal and the second-phase control signal, generates a first-phase drive signal for the first phase bridge arm based on the first-phase control signal, and outputs the second-phase control signal to the second driver board. The second driver board receives the second-phase control signal and generates a second-phase drive signal for the second phase bridge arm based on the second-phase control signal.

[0038] In this embodiment of the invention, at least two phase control signals may further include a third phase control signal. Correspondingly, the aforementioned at least two drive boards may further include a third drive board, and the power conversion circuit may further include a third phase bridge arm.

[0039] The controller outputs a first-phase control signal, a second-phase control signal, and a third-phase control signal via a control output port. The first drive board receives these signals, generates a first-phase drive signal for the first phase bridge arm based on the first-phase control signal, and outputs the second and third-phase control signals to the second drive board. The second drive board receives the second and third-phase control signals, generates a second-phase drive signal for the second phase bridge arm based on the second-phase control signal, and sends it to the third phase bridge arm. The third drive board receives the third-phase control signal and generates a third-phase drive signal for the third phase bridge arm.

[0040] In practice, the control output port and the first drive port of the first drive board can be connected by a wired cable. When setting up the first drive board, the first drive port can be placed as close as possible to the control output port, that is, the distance between the first drive port and the control output port should be minimized to shorten the length of the wired cable between the first drive port and the control output port.

[0041] Specifically, the length of the wired cable between the first drive port and the control output port can be set based on the specific application scenario. Typically, with proper configuration, the length of the wired cable between the first drive port and the control output port can be limited to no more than 10cm.

[0042] In some embodiments, the distance between the first drive port and the control output port is 10 cm. In other embodiments, the distance between the first drive port and the control output port is 8 cm or less.

[0043] In this embodiment of the invention, the first driving board may include a first phase driving circuit, a first driving port, and a second driving port.

[0044] In a specific implementation, the first drive port is coupled to the control output port and includes at least two signal terminals to receive at least two phase control signals output by the controller;

[0045] The first phase drive circuit is coupled to the first signal terminal of at least two signal terminals. The first phase control signal is output to the first phase drive circuit via the first signal terminal. The first phase drive circuit drives the first phase control signal to obtain the first phase drive signal and outputs it to the first phase bridge arm.

[0046] The second drive port is coupled to at least two signal terminals other than the first signal terminal, and outputs a second phase control signal.

[0047] The second driver board may include a second phase driver circuit and a third driver port, wherein:

[0048] The third drive port is coupled to the second drive port on the first drive board and includes at least one signal terminal; one of the at least one signal terminals receives a second phase control signal.

[0049] The second-phase drive circuit is coupled to the third-phase drive port and generates the second-phase drive signal based on the second-phase control signal.

[0050] Taking the controller outputting the first phase drive signal and the second phase drive signal as an example.

[0051] The first driver board may include a first phase driver circuit, a first driver port, and a second driver port. The second driver board includes a second phase driver circuit and a third driver port.

[0052] A first drive port is coupled to a control output port and includes a first signal terminal and a second signal terminal. The first signal terminal of the first drive port receives a first-phase control signal, and the second signal terminal receives a second-phase control signal. A first-phase drive circuit is coupled to the first signal terminal, and the first-phase control signal is output to the first-phase drive circuit via the first signal terminal; the first-phase drive circuit drives the first-phase control signal to obtain a first-phase drive signal and outputs it to the first-phase bridge arm. The second signal terminal of the first drive port is coupled to the second drive port and outputs the second-phase control signal.

[0053] The third drive port is coupled to the second drive port and includes a fourth signal terminal. The fourth signal terminal receives the second phase control signal and outputs the second phase control signal to the second phase drive circuit. The second phase drive circuit drives the second phase control signal to obtain the second phase drive signal and outputs it to the second phase bridge arm.

[0054] Taking the controller outputting the first phase drive signal, the second phase drive signal, and the third phase drive signal as an example.

[0055] The first driver board includes a first-phase driver circuit, a first driver port, and a second driver port. The first driver port includes three signal terminals: a first signal terminal receives a first-phase control signal, a second signal terminal receives a second-phase control signal, and a third signal terminal receives a third-phase control signal. The first-phase control signal is output to the first-phase driver circuit via the first signal terminal; the first-phase driver circuit drives the first-phase control signal to obtain a first-phase driver signal, which is then output to the first-phase bridge arm. The second driver port includes two signal terminals: a first signal terminal receives the second-phase control signal, and a second signal terminal receives the third-phase control signal.

[0056] The second driver board includes a second-phase drive circuit, a third drive port, and a fourth drive port. The third drive port is coupled to the second drive port of the first driver board and includes two signal terminals. The first signal terminal of the third drive port receives the second-phase control signal and outputs it to the second-phase drive circuit; the second-phase drive circuit drives the second-phase control signal to obtain a first-phase drive signal and outputs it to the first-phase bridge arm. The second signal terminal of the third drive port receives the third-phase control signal and outputs it to the fourth drive port. The fourth drive port includes a signal terminal coupled to the second signal terminal of the third drive port, which receives the third-phase control signal.

[0057] The third driver board includes a third-phase driver circuit and a fifth driver port. The fifth driver port includes a signal terminal coupled to the signal terminal of the fourth driver port, which receives the third-phase control signal. The third-phase driver circuit is coupled to the signal terminal of the fifth driver port and generates a third-phase driver signal based on the third-phase control signal. The third-phase driver signal is then output to the third-phase bridge arm.

[0058] Reference Figure 2 A schematic diagram of a power converter according to an embodiment of the present invention is provided.

[0059] Figure 2 In the control board 10, there are a controller 11 and a control output port 12. The controller 11 outputs a first phase control signal through the first output terminal of the control output port 12, outputs a second phase control signal through the second output terminal of the control output port 12, and outputs a third phase control signal through the third output terminal of the control output port 12.

[0060] The first driver board 20 includes: a first driver port 21, a second driver port 22, and a first phase driver circuit.

[0061] The first drive port 21 includes a first signal terminal, a second signal terminal, and a third signal terminal. The first signal terminal of the first drive port 21 receives a first phase control signal, the second signal terminal of the first drive port 21 receives a second phase control signal, and the third signal terminal of the first drive port 21 receives a third phase control signal.

[0062] The second drive port 22 includes a first signal terminal and a second signal terminal. The first signal terminal of the second drive port 22 receives the second phase control signal, and the second signal terminal of the second drive port 22 receives the third phase control signal.

[0063] The first signal terminal of the first drive port 21 is coupled to the first phase drive circuit. The first phase drive circuit generates the first phase drive signal after driving the first phase control signal, and the first phase drive signal is output to the first phase bridge arm.

[0064] The second driver board 30 includes: a third driver port 31, a fourth driver port 32, and a second phase driver circuit.

[0065] The third drive port 31 includes a first signal terminal and a second signal terminal. The first signal terminal of the third drive port 31 is coupled to the first signal terminal of the second drive port 22 to input the second phase control signal. The second signal terminal of the third drive port 31 is coupled to the second signal terminal of the second drive port 22 to input the third phase control signal.

[0066] The fourth drive port 32 includes a first signal terminal, and the first signal terminal of the fourth drive port receives the third phase control signal.

[0067] The first signal terminal of the third drive port 31 is coupled to the second phase drive circuit. The second phase drive circuit generates a second phase drive signal after driving the received second phase control signal, and the second phase drive signal is output to the second phase bridge arm.

[0068] The third driver board 40 includes: a fifth driver port 41 and a third phase driver circuit.

[0069] The fifth drive port 41 includes a first signal terminal, which is coupled to the third-phase drive circuit and outputs a third-phase control signal. The third-phase drive circuit generates a third-phase drive signal after driving the received third-phase control signal, and the third-phase drive signal is output to the third-phase bridge arm.

[0070] In this embodiment of the invention, the first driving board 20, the second driving board 30 and the third driving board 40 may each be provided with a synchronous forwarding circuit to forward the received signal.

[0071] In specific implementation, after receiving the first phase control signal, the second phase control signal, and the third phase control signal, the first driver board 20 synchronously forwards the second phase control signal and the third phase control signal to the second driver board 30. The second driver board 30, upon receiving the second phase control signal and the third phase control signal, synchronously forwards the third phase control signal to the third driver board 40. Through the synchronous forwarding circuit, the first phase drive signal output by the first driver board 20, the second phase drive signal output by the second driver board 30, and the third phase drive signal output by the third driver board 40 are synchronized.

[0072] In other words, by setting up a synchronous forwarding circuit, the second phase drive signal is input to the second phase bridge arm and the third phase drive signal is input to the third phase bridge arm at the same time as the first phase drive signal is input to the first phase bridge arm.

[0073] In specific implementations, the aforementioned synchronization forwarding circuit can be located in the signal terminals of the first drive port 21, the third drive port 31, and the fifth drive port 41. That is, a synchronization forwarding circuit can be located in any of the signal terminals of the first drive port 21, the third drive port 31, and the fifth drive port 41.

[0074] Alternatively, the aforementioned synchronous forwarding circuit can be set independently of the first drive port 21, the third drive port 31, and the fifth drive port 41.

[0075] For example, the first driver board 20 is provided with a synchronous forwarding circuit, which is coupled between the first signal terminal of the first driver port 21 and the first phase driver circuit; the second driver board 30 is provided with a synchronous forwarding circuit, which is coupled between the first signal terminal of the third driver port 31 and the second phase driver circuit; the third driver board 40 is provided with a synchronous forwarding circuit, which is coupled between the first signal terminal of the fifth driver port 41 and the third phase driver circuit.

[0076] In some embodiments, the synchronization forwarding circuit can be implemented based on a digital signal buffer or a clock synchronization circuit. Alternatively, other circuits can be used to implement the synchronization forwarding function.

[0077] As mentioned above Figure 2 The power converter provided in the example may have different structures for the first driver board, the second driver board, and the third driver board.

[0078] In this embodiment of the invention, the first drive board, the second drive board, and the third drive board can have identical structures and identical connection relationships with their respective bridge arms. Each of the drive boards can include two drive ports.

[0079] Specifically, each driver board includes a driver circuit and two driver ports. Each driver port includes at least three signal terminals, and at least a portion of these three signal terminals are used to transmit control signals. The signal terminals other than those used for transmitting control signals serve as ground terminals.

[0080] Reference Figure 3 A schematic diagram of another power conversion circuit according to an embodiment of this utility model is given below. Figure 3 Please provide an explanation. Figure 3 In this case, the first drive board, the second drive board, and the third drive board have the same structure.

[0081] Specifically, the first driver board 20 includes a first driver port 21, a second driver port 22, and a first phase driver circuit.

[0082] The first drive port 21 includes a first signal terminal, a second signal terminal, and a third signal terminal. The first signal terminal of the first drive port 21 receives a first phase control signal, the second signal terminal of the first drive port 21 receives a second phase control signal, and the third signal terminal of the first drive port 21 receives a third phase control signal.

[0083] The second drive port 22 includes a first signal terminal, a second signal terminal, and a ground terminal. The first signal terminal of the second drive port 22 receives the second phase control signal, and the second signal terminal of the second drive port 22 receives the third phase control signal.

[0084] The first signal terminal of the first drive port 21 is coupled to the first phase drive circuit. The first phase drive circuit generates the first phase drive signal after driving the first phase control signal, and the first phase drive signal is output to the first phase bridge arm.

[0085] The second driver board 30 includes a third driver port 31, a fourth driver port 32, and a second phase driver circuit.

[0086] The third drive port 31 includes a first signal terminal, a second signal terminal, and a third signal terminal. The first signal terminal of the third drive port 31 is coupled to the first signal terminal of the second drive port 22 and receives the second phase control signal; the second signal terminal of the third drive port 31 is coupled to the second signal terminal of the second drive port 22 and receives the third phase control signal; the third signal terminal of the third drive port 31 is coupled to the ground terminal of the second drive port 22.

[0087] The fourth drive port 32 includes a first signal terminal, a second signal terminal, and a ground terminal. The first signal terminal of the fourth drive port 32 is coupled to the second signal terminal of the third drive port 31 to input the third phase control signal; the second signal terminal of the fourth drive port 32 is coupled to the third signal terminal of the third drive port 31.

[0088] The first signal terminal of the third drive port 31 is coupled to the second phase drive circuit. The second phase drive circuit generates the second phase drive signal after driving the second phase control signal, and the second phase drive signal is output to the second phase bridge arm.

[0089] The third driver board 40 includes a fifth driver port 41, a sixth driver port 42, and a second phase driver circuit.

[0090] The fifth drive port 41 includes a first signal terminal, a second signal terminal, and a third signal terminal. The first signal terminal of the fifth drive port 41 receives the third phase control signal, the second signal terminal of the fifth drive port 41 is coupled to the second signal terminal of the fourth drive port 32, and the third signal terminal of the fifth drive port 41 is coupled to the ground terminal of the fourth drive port 32.

[0091] The sixth drive port 42 includes a first signal terminal, a second signal terminal, and a ground terminal. The first signal terminal of the sixth drive port 42 is coupled to the second signal terminal of the fifth drive port 41, and the second signal terminal of the sixth drive port 42 is coupled to the third signal terminal of the fifth drive port.

[0092] The first signal terminal of the fifth drive port 41 is coupled to the third phase drive circuit. The third phase drive circuit generates the third phase drive signal after driving the third phase control signal, and the third phase drive signal is output to the third phase bridge arm.

[0093] Since there is no next-level driver board after the third driver board 40, and the first signal terminal of the sixth driver port 42 is substantially coupled to the ground terminal of the fourth driver port 32, the first signal terminal of the sixth driver port 42 is essentially coupled to the ground terminal. Correspondingly, the second signal terminal of the fourth driver port 32 is substantially coupled to the ground terminal of the second driver port 22, so the second output terminal of the fourth driver port 32 is also substantially coupled to the ground terminal.

[0094] In some embodiments, the first phase control signal is an A-phase control signal, the second phase control signal is a B-phase control signal, and the third phase control signal is a C-phase control signal. Accordingly, the first drive board 20 can also be referred to as the A-phase drive board, the second drive board 30 as the B-phase drive board, and the third drive board 40 as the C-phase drive board.

[0095] It is understood that the first phase control signal can be any one of the A-phase control signal, B-phase control signal, and C-phase control signal. Correspondingly, the second phase control signal can be one of the other two phase control signals, and the third phase control signal can be the other one of the other two phase control signals. In other words, the first phase control signal, the second phase control signal, and the third phase control signal each correspond to one of the A-phase control signal, B-phase control signal, and C-phase control signal, and each of the first phase control signal, the second phase control signal, and the third phase control signal must be different.

[0096] For example, the controller outputs a first-phase control signal (C-phase), a second-phase control signal (B-phase), and a third-phase control signal (A-phase) via the control output port. Correspondingly, the first drive board 20 is a C-phase drive board, the second drive board 30 is a B-phase drive board, and the third drive board 40 is an A-phase drive board.

[0097] It is evident that whether the first phase control signal output by the first driver board 20 is an A-phase control signal, a B-phase control signal, or a C-phase control signal is determined by the controller. If the controller outputs an A-phase control signal through the first output terminal of the control output port, then the first phase control signal output by the first driver board 20 is an A-phase control signal. Similarly, if the controller outputs a B-phase control signal through the first output terminal of the control output port, then the first phase control signal output by the first driver board 20 is a B-phase control signal. And if the controller outputs a C-phase control signal through the first output terminal of the control output port, then the first phase control signal output by the first driver board 20 is a C-phase control signal.

[0098] In summary, in this embodiment of the invention, by forwarding other phase control signals through the first driver board, it is only necessary to directly connect the first driver board to the control board; other driver boards can be connected to the preceding driver board. This avoids the high system complexity caused by long signal lines between some driver boards and the control board, prevents the introduction of additional electromagnetic interference, and improves signal integrity and transmission efficiency.

[0099] By setting synchronous forwarding circuits in the first driver board, the second driver board, and the third driver board respectively, the first phase control signal output by the first driver board, the second phase control signal output by the second driver board, and the third phase control signal output by the third driver board can be synchronized, ensuring the integrity and synchronization of the signal during transmission.

[0100] Furthermore, since the first, second, and third driver boards have identical structures, a unified interface (each includes two driver ports, and the first, third, and fifth driver ports have identical structures, as do the second, fourth, and sixth driver ports) and electrical characteristics, interchangeability and standardized design between driver boards are achieved. All driver boards use the same driver ports, eliminating the need for port matching or customized modifications for different phases during system maintenance and replacement, simplifying the operation process and reducing maintenance time and engineering costs. Simultaneously, the identical driver port design across all driver boards provides strong support for system scalability.

[0101] In addition, setting ground terminals in the second, fourth, and sixth drive ports can also serve as an extension of the ground terminal function.

[0102] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A power converter, characterized in that, include: The system includes a control board, at least two driver boards, and a power conversion circuit, wherein the at least two driver boards include a first driver board and a second driver board, and the power conversion circuit includes a first phase bridge arm and a second phase bridge arm. The control board includes a controller and a control output port. The controller is coupled to the control output port and outputs at least two-phase control signals through the control output port. The at least two-phase control signals include a first-phase control signal and a second-phase control signal. The first drive board is coupled to the control output port and receives the at least two phase control signals; the first drive board generates a first phase drive signal to the first phase bridge arm according to the first phase control signal, and outputs a second phase control signal to the second drive board; The second drive board is coupled to the first drive board and receives the second phase control signal; the second drive board generates a second phase drive signal to the second phase bridge arm according to the second phase control signal.

2. The power converter as described in claim 1, characterized in that, The first driver board includes: a first phase driver circuit, a first driver port, and a second driver port, wherein: The first drive port is coupled to the control output port and includes at least two signal terminals to receive the at least two phase control signals. The first phase drive circuit is coupled to the first signal terminal of the at least two signal terminals, and generates the first phase drive signal according to the first phase control signal; The second drive port is coupled to the other signal terminals of the at least two signal terminals except for the first signal terminal, and outputs the second phase control signal.

3. The power converter as described in claim 2, characterized in that, The second driver board includes: a second-phase driver circuit and a third driver port, wherein: The third drive port is coupled to the second drive port and includes at least one signal terminal for receiving the second phase control signal; The second phase drive circuit is coupled to the third drive port and generates the second phase drive signal according to the second phase control signal.

4. The power converter as described in claim 1, characterized in that, The at least two drive boards also include a third drive board, the power conversion circuit also includes a third phase bridge arm, and the at least two phase control signals also include a third phase control signal; The first driver board also outputs the third phase control signal to the second driver board; The second drive board also outputs the third phase control signal to the third drive board; The third drive board is coupled to the second drive board and receives the third phase control signal; The third drive board generates a third-phase drive signal to the third-phase bridge arm based on the third-phase control signal.

5. The power converter as described in claim 4, characterized in that, The first driver board includes: a first phase driver circuit, a first driver port, and a second driver port, wherein: The first drive port is coupled to the control output port and includes three signal terminals to receive three-phase control signals. The first phase drive circuit is coupled to the first signal terminal in the first drive port, and generates the first phase drive signal according to the first phase control signal. The second drive port includes two signal terminals, which are respectively coupled to the second signal terminal and the third signal terminal of the first drive port, and output the second phase control signal and the third phase control signal.

6. The power converter as described in claim 5, characterized in that, The second driver board includes: a second-phase driver circuit, a third driver port, and a fourth driver port, wherein: The third drive port is coupled to the second drive port of the first drive board and includes two signal terminals; The second phase drive circuit is coupled to the first signal terminal in the third drive port, and generates the second phase drive signal according to the second phase control signal; The fourth drive port is coupled to the second signal terminal of the third drive port, and includes a signal terminal for outputting the third phase control signal.

7. The power converter as described in claim 6, characterized in that, The third drive board includes: a third-phase drive circuit and a fifth drive port, wherein: The fifth drive port is coupled to the fourth drive port and includes a signal terminal; The third-phase drive circuit is coupled to the signal terminal of the fifth drive port and generates the third-phase drive signal according to the third-phase control signal.

8. The power converter as described in claim 4, characterized in that, The first drive board, the second drive board, and the third drive board have the same structure.

9. The power converter as described in claim 8, characterized in that, Each driver board includes a driver circuit and two driver ports. Each driver port includes at least three signal terminals, and at least a portion of the at least three signal terminals of each driver port is used for control signal transmission.

10. The power converter as described in claim 9, characterized in that, In each drive port, the signal terminal other than the one used for control signal transmission is used as the ground terminal.

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