A control circuit and electric welder

Abstract

The utility model discloses an control circuit and electric welding machine. Control circuit includes: control panel and control module, control panel is used to receive first input signal, and control module is used for connecting load, at least one first communication module is connected between control panel and bus, and first communication module is used to convert first input signal into first communication signal, and first communication signal is transmitted to bus, at least one second communication module is connected between bus and control module, and second communication module is used to receive first communication signal and convert first communication signal into first control signal, and control module is used for controlling load work according to first control signal. The control circuit has obtained the beneficial effect of not needing to transform the core communication logic of original control panel and control module, and greatly reducing hardware modification and protocol adjustment workload.

Description

Technical Field

[0001] This utility model relates to the fields of electronic technology and bus communication technology, and in particular to a control circuit and an electric welding machine. Background Technology

[0002] In the field of industrial welding, welding machines are key equipment, and the communication performance of their control circuits directly affects the stability and flexibility of welding operations.

[0003] Existing welding machine control circuits mostly use a fixed communication framework, with various functional modules, such as the control panel and the control module, communicating via serial ports, resulting in a relatively simple communication method. In practical applications, if welding parameters need to be fed back, it is often necessary to significantly modify the original communication framework. This not only increases the modification cost and technical difficulty but may also affect the original stability of the equipment.

[0004] The existing control circuits of welding machines suffer from poor communication methods, which has become a technical problem that urgently needs to be solved in the industry. Utility Model Content

[0005] This utility model provides a control circuit and a welding machine to solve the problem that existing welding machine control circuits require significant modifications to the original framework when connecting to a welding gun display module, and that it is difficult to achieve distributed control of multiple modules.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] In a first aspect, embodiments of the present invention provide a control circuit, comprising:

[0008] The control panel is used to receive a first input signal, and the control module is used to connect to a load.

[0009] At least one first communication module is connected between the control panel and the bus. The first communication module is used to convert the first input signal into a first communication signal and transmit the first communication signal to the bus.

[0010] At least one second communication module is connected between the bus and the control module. The second communication module is used to receive the first communication signal and convert the first communication signal into a first control signal. The control module is used to control the load to work according to the first control signal.

[0011] Optionally, the control circuit further includes:

[0012] A screen display module is connected to the first communication module and / or the second communication module;

[0013] The screen display module is used to display the status information of the control panel according to the first input signal and / or the first communication signal; the screen display module is also used to receive gesture operation signals, convert the gesture operation signals into second input signals, and display the second input signals.

[0014] Optionally, at least one of the first communication modules is connected to the screen display module, and the at least one first communication module is used to convert the second input signal into a second communication signal and transmit it to the bus;

[0015] The second communication module is connected to the bus and is used to receive the second communication signal and convert the second communication signal into a second control signal; the control module is used to control the load to work according to the second control signal.

[0016] Optionally, at least one of the second communication modules is connected to the screen display module, and the at least one second communication module is used to convert the second input signal into a second control signal; and / or to generate a first display signal based on the first communication signal;

[0017] The control module is used to control the load to work according to the second control signal;

[0018] The screen display module is used to display the second input signal; and / or, according to the first display signal, to display the working status of the control panel.

[0019] Optionally, the first communication module includes a first communication processing unit and a first control unit. The first communication processing unit is connected between the bus and the first control unit. The first control unit is connected to the control panel and is used to receive a first input signal transmitted by the control panel. The first communication processing unit is used to convert the first input signal into a first communication signal when transmitting.

[0020] The second communication module includes a second communication processing unit and a second control unit. The second communication processing unit is connected between the bus and the second control unit, and the second control unit is connected to the control module. The second communication processing unit is used to convert a first communication signal transmitted by the bus into a first control signal upon receiving a signal; and / or to convert a second communication signal transmitted by the bus into a second control signal. The second control unit is used to transmit the first control signal and / or the second control signal to the control module.

[0021] Optionally, the first communication module further includes:

[0022] A carrier processing unit is connected to the first control unit and is configured to connect to the screen display module; the carrier processing unit is configured to generate a first carrier signal based on the first input signal; or, receive a second input signal and generate a second carrier signal based on the second input signal.

[0023] The screen display module is used to display the status information of the control panel according to the first carrier signal; and / or, to display the status information of the screen display module according to the second carrier signal; wherein the status information includes the target voltage and target current input to the control module.

[0024] Optionally, the carrier processing unit includes:

[0025] The first interface is used to connect to the screen display module;

[0026] The system comprises a transmission control terminal, a first switching transistor, a second switching transistor, and a first current-limiting resistor. The transmission control terminal is connected to the first control unit. The control electrode of the first switching transistor is connected to the transmission control terminal. The first electrode of the first switching transistor is connected to a first power supply terminal through the first current-limiting resistor and is also connected to the control electrode of the second switching transistor. The second electrode of the first switching transistor is connected to a ground terminal. The first electrode of the second switching transistor is connected to the first interface and the second power supply terminal, and the second electrode of the second switching transistor is also connected to the ground terminal.

[0027] The system includes a receiving control terminal and a voltage divider resistor network. The first end of the voltage divider resistor network is connected to the first interface, the second end of the voltage divider resistor network is connected to the receiving control terminal, and the second end of the voltage divider resistor network is grounded.

[0028] Optionally, the first communication processing unit includes:

[0029] A CAN controller is used to connect to the first control unit via an SPI bus; the CAN controller is used to process the CAN protocol.

[0030] A CAN transceiver is connected to the TXCAN and RXCAN terminals of the CAN controller. The CAN transceiver is used to convert the signals transmitted by the CAN controller and the bus.

[0031] The second interface is connected to the CAN transceiver and is used to connect to the bus, which includes the CAN bus.

[0032] Optionally, the first communication processing unit further includes:

[0033] A protective component is connected between the CAN transceiver and the second interface, and the protective component is used to protect the CAN transceiver;

[0034] The first communication processing unit and the second communication processing unit have the same structure.

[0035] Secondly, this utility model embodiment also provides an electric welding machine, including: a control circuit as described in any one of the embodiments of this utility model.

[0036] The control circuit provided in this embodiment includes a control panel, a first communication module, a second communication module, a control module, and a bus. The control panel receives user operation commands, the first communication module converts these commands into communication signals conforming to the bus transmission standard, the second communication module receives these signals and converts them into control signals that the control module can recognize and execute. The control module then regulates the load operation based on these control signals. The bus uses the CAN communication protocol, supporting parallel communication of multiple modules on the same bus. Adding or removing modules only requires connecting them to the bus and matching the protocol. This control circuit solves the problems of existing welding machine control circuits, which use a fixed serial communication framework and have a single communication method, requiring significant modifications to the original circuit when expanding to new functional modules. These modifications are costly, technically challenging, and may affect equipment stability. This control circuit achieves the beneficial effect of not requiring modifications to the core communication logic of the original control panel and control module, significantly reducing hardware changes and protocol adjustments.

[0037] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the structure of a welding machine control circuit provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of another control circuit provided in an embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the specific structure of a control circuit provided in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of another control circuit provided in this embodiment of the present invention.

[0043] Figure 5 This is a schematic diagram of the structure of the carrier processing unit provided in this embodiment of the utility model;

[0044] Figure 6 This is a schematic diagram of the CAN communication signal processing circuit provided in an embodiment of the present invention. Detailed Implementation

[0045] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] Based on the above-mentioned technical problems, this embodiment proposes the following solutions:

[0048] Figure 1 This is a schematic diagram of a control circuit provided in an embodiment of this utility model. See also... Figure 1The control circuit includes: a control panel 100 and a control module 400, wherein the control panel 100 is used to receive a first input signal, and the control module 400 is used to connect a load; at least one first communication module 200 is connected between the control panel 100 and the bus 500, and the first communication module 200 is used to convert the first input signal into a first communication signal and transmit the first communication signal to the bus 500; at least one second communication module 300 is connected between the bus 500 and the control module 400, and the second communication module 300 is used to receive the first communication signal and convert the first communication signal into a first control signal; the control module 400 is used to control the load to work according to the first control signal.

[0049] The control panel 100 is a key component for human-machine interaction, primarily responsible for receiving user commands. The first input signal refers to the operation signal input by the operator through the control panel 100. For example, the first input signal can be a command input via buttons or knobs, such as adjusting welding current or voltage, or starting welding. The first communication module 200 acts as a signal converter and transmitter. It converts the first input signal input by the user through the control panel 100 into a first communication signal conforming to the bus 500 transmission standard, and then sends the converted first communication signal to the bus 500, ensuring stable signal transmission on the bus 500. The second communication module 300 acts as a signal receiver and secondary converter. When the first communication signal is transmitted through the bus 500, the second communication module 300 receives the signal and converts it into a first control signal that the control module 400 can directly recognize and execute. It then transmits the converted signal to the control module 400, allowing the control module 400 to adjust the load operation according to the first control signal.

[0050] For example, the first input signal can be a command signal to increase the welding current, and the first control signal can be an electrical signal or command code matched to the interface of the control module 400. When the control panel 100 receives the command signal to increase the welding current, it is converted into a first communication signal by the first communication module 200 and transmitted on the bus 500. After receiving the first communication signal, the second communication module 300 converts it into a corresponding first control signal. This first control signal carries the command information to increase the welding current. After receiving the first control signal, the control module 400 adjusts the load accordingly to increase the welding current. For example, the load is the welding component of the welding machine, and the bus 500 is a CAN bus.

[0051] The control circuit provided in this embodiment includes a control panel 100, a first communication module 200, a second communication module 300, a control module 400, and a bus 500. The control panel 100 receives user operation commands, the first communication module 200 converts these commands into communication signals conforming to the bus 500 transmission standard, the second communication module 300 receives these communication signals and converts them into control signals that the control module 400 can recognize and execute. The control module 400 then regulates the load operation based on these control signals. The bus 500 uses the CAN communication protocol, supporting parallel communication of multiple modules through the same bus. Adding or removing modules only requires connecting to the bus 500 and matching the protocol. The control circuit provided in this embodiment solves the problem that existing welding machine control circuits, due to their fixed serial communication framework and single communication method, require significant modifications to the original circuit when expanding to new functional modules, resulting in high modification costs, high technical difficulty, and potential impact on equipment stability. This control circuit achieves the beneficial effect of not requiring modifications to the core communication logic of the original control panel 100 and control module 400, significantly reducing the workload of hardware modifications and protocol adjustments.

[0052] Figure 2 This is a schematic diagram of another control circuit provided in an embodiment of this utility model. See also... Figure 2 Optionally, the control circuit may further include:

[0053] The screen display module 600 is connected to the first communication module 200 and / or the second communication module 300.

[0054] The screen display module 600 is used to display the status information of the control panel 100 according to the first input signal and / or the first communication signal; the screen display module 600 is also used to receive gesture operation signals, convert the gesture operation signals into second input signals, and display the second input signals.

[0055] The screen display module 600 is a component in the control circuit that combines display and interactive functions. The display function shows the real-time status information of the control panel 100, allowing users to intuitively understand the operation feedback. For example, it displays the current welding parameter settings and equipment operating mode, such as the equipment's on / off status. Furthermore, the screen display module 600 can also display load feedback information through the control module 400 and the second communication module 300. For example, when the load is a welding component of a welding machine, if welding is complete, the control module 400 sends the welding completion status data to the second communication module 300, which forwards the status data to the screen display module 600, which then displays the status. The interactive function is an additional human-machine interface that can receive user gestures, such as touch swipes and clicks, converting them into signals recognizable by the circuit, and simultaneously displaying the content corresponding to these gestures.

[0056] Gesture operation signals refer to the raw signals generated when a user performs gesture operations through the screen display module 600. For example, actions such as sliding to adjust the welding current or clicking to switch welding modes on the screen display module 600 will be captured by the screen display module 600 and converted into corresponding electrical or image signals; these are gesture operation signals. The second input signal is a standardized signal resulting from the processing of the gesture operation signal by the screen display module 600. After receiving the gesture operation signal, the screen display module 600 converts it into a signal format conforming to circuit communication specifications. The second input signal functions similarly to the first input signal, but its source is the gesture rather than the control panel 100.

[0057] In this embodiment, the screen display module 600 can simultaneously display the status information of the control panel 100 in real time, allowing users to intuitively obtain operation feedback and avoiding misoperation due to opaque parameters. Furthermore, it supports gesture operation, supplementing the interaction method of traditional physical buttons. Especially in complex welding environments where it is inconvenient to touch the physical buttons on the control panel 100, gesture operation is more convenient, reducing operation steps and improving control efficiency. In the control circuit, the design allows both the screen display module 600 and the control panel 100 to control the control module 400, realizing a distributed control architecture. The screen display module 600 and the control panel 100 do not affect each other; even if one fails, the entire control circuit will not fail.

[0058] Optionally, at least one first communication module 200 is connected to the screen display module 600, and the at least one first communication module 200 is used to convert the second input signal into a second communication signal and transmit it to the bus 500.

[0059] The second communication module 300 is connected to the bus 500. The second communication module 300 is used to receive the second communication signal and convert the second communication signal into a second control signal. The control module 400 is used to control the load to work according to the second control signal.

[0060] The second communication signal is an intermediate transmission signal corresponding to the gesture operation, and it is a standardized form of gesture command transmission in the bus 500. For example, when a user performs a gesture operation through the screen display module 600, the screen display module 600 first converts the gesture action into a second input signal. At this time, the first communication module 200 connected to the screen display module 600 processes the second input signal, converting it into a signal format conforming to the bus 500 transmission specifications, such as specific encoding, timing, or protocol. This converted signal is the second communication signal. The second control signal is the execution instruction that the gesture operation ultimately applies to the control module 400. For example, after receiving the second control signal, the control module 400 controls the load to perform corresponding operations according to its instruction content, ultimately realizing the control of the load through gesture operation.

[0061] See also Figure 2 Optionally, at least one second communication module 300 is connected to the screen display module 600, and the at least one second communication module 300 is used to convert the second input signal into a second control signal; and / or to generate a first display signal based on the first communication signal.

[0062] The control module 400 is used to control the load to work according to the second control signal.

[0063] The screen display module 600 is used to display the second input signal; and / or, according to the first display signal, to display the working status of the control panel 100.

[0064] The second control signal is primarily generated by the second communication module 300. When a user performs a gesture operation via the screen display module 600, the screen display module 600 first converts the gesture into a second input signal. If the second communication module 300 is connected to the screen display module 600, it can directly receive the second input signal and convert it into a second control signal. For example, the gesture operation could be sliding to adjust welding parameters, clicking to switch modes, etc. The second control signal is an instruction signal that the control module 400 can directly recognize and execute, used to drive the load to complete the corresponding operation. For example, when a user issues an instruction to increase the welding current via a gesture, the final generated second control signal will carry this instruction information. After receiving it, the control module 400 will adjust the load to increase the welding current. The core function of the first display signal is to transmit the information to be displayed to the screen display module 600, ensuring that the user can intuitively understand the working status of the control panel 100. For example, when a user adjusts the welding current via the control panel 100, the relevant command is converted into a first communication signal and transmitted via the bus 500. The second communication module 300 receives this signal and generates a first display signal, driving the screen display module 600 to display the current current value. The connection between the second communication module 300 and the screen display module 600 bypasses the intermediate step from the first communication module 200 to the bus 500, allowing the second communication module 300 to directly convert the gesture operation signal into a second control signal and transmit it to the control module 400. This reduces intermediate steps in signal transmission, making it suitable for scenarios requiring high response speeds, such as emergency welding pauses or rapid parameter adjustments. It also reduces signal latency, resulting in more immediate feedback from gesture operations.

[0065] Figure 3 This is a schematic diagram of a control circuit provided in an embodiment of the present invention. Optionally, the first communication module 200 includes a first communication processing unit 220 and a first control unit 210. The first communication processing unit 220 is connected between the bus 500 and the first control unit 210. The first control unit 210 is connected to the control panel 100 and is used to receive a first input signal transmitted by the control panel 100. The first communication processing unit 220 is used to convert the first input signal into a first communication signal when transmitting.

[0066] The second communication module 300 includes a second communication processing unit 320 and a second control unit 310. The second communication processing unit 320 is connected between the bus 500 and the second control unit 310, and the second control unit 310 is connected to the control module 400. The second communication processing unit 320 is used to convert a first communication signal transmitted by the bus 500 into a first control signal and / or convert a second communication signal transmitted by the bus 500 into a second control signal when receiving data. The second control unit 310 is used to transmit the first control signal and / or the second control signal to the control module 400.

[0067] The first communication processing unit 220 is a signal converter between the first communication module 200 and the bus 500, responsible for adapting the raw signals to a format that the bus 500 can transmit, ensuring that user operation commands can be stably transmitted to subsequent modules on the bus 500. The first control unit 210, interfacing with the control panel 100, can capture the user's operational intentions, providing reliable raw data for subsequent signal conversion. The second communication processing unit 320 is a signal receiver and converter between the second communication module 300 and the bus 500, responsible for parsing the signals on the bus 500 and converting them into a format recognizable by the control module 400. The second control unit 310 acts as a bridge between the second communication module 300 and the control module 400, responsible for transmitting the converted control signals to the control module 400, triggering the control module 400 to regulate the load.

[0068] Figure 4 This is a schematic diagram of another control circuit provided in an embodiment of the present invention. See also... Figure 4 Optionally, the first communication module 200 further includes:

[0069] The carrier processing unit 230 is connected to the first control unit 210 and is used to connect to the screen display module 600. The carrier processing unit 230 is used to generate a first carrier signal according to a first input signal; or, receive a second input signal and generate a second carrier signal according to the second input signal.

[0070] The screen display module 600 is used to display the status information of the control panel 100 according to the first carrier signal; and / or, to display the status information of the screen display module 600 according to the second carrier signal; wherein the status information includes the target voltage and target current input to the control module 400.

[0071] The essence of carrier processing is to use high-frequency signals to carry low-frequency information. In the control circuit, a stable high-frequency electrical signal is first determined as the carrier. Then, the first or second input signal is loaded onto the carrier. By changing the amplitude, frequency, or phase of the carrier, the carrier becomes the carrier of the first or second input signal; this process is called "modulation." When the first or second input signal is transmitted to a display module 600, the original information is extracted from the carrier through a "demodulation" process, thus achieving data transmission. The carrier processing unit 230 is the core component responsible for this "modulation" work. After receiving the first or second input signal, it generates a first or second carrier signal through modulation, and then transmits these information-carrying carrier signals to the display module 600. The display module 600 then demodulates the carrier signal to obtain the required status information and displays it. The carrier processing unit 230 of this embodiment is suitable for communication on existing lines without the need to lay additional dedicated communication lines, which can simplify circuit wiring and reduce hardware costs. At the same time, the high-frequency carrier has strong anti-interference ability and can transmit parameter information more stably in complex electromagnetic environments such as welding machines, ensuring the accuracy of screen display.

[0072] Figure 5 This is a schematic diagram of the carrier processing unit provided in an embodiment of the present invention. See also... Figure 5 Optionally, the carrier processing unit 230 includes:

[0073] The first interface CH4 is used to connect to the screen display module 600.

[0074] The system includes a transmit control terminal USART2 TX, a first switch Q1, a second switch Q2, and a first current-limiting resistor R1. The transmit control terminal USART2 TX is connected to the first control unit 210 (not shown in the MCU1 diagram). The control terminal of the first switch Q1 is connected to the transmit control terminal USART2 TX. The first terminal of the first switch Q1 is connected to the first power supply Vcc1 through the first current-limiting resistor R1 and is also connected to the control terminal of the second switch Q2. The second terminal of the first switch Q1 is connected to the ground terminal. The first terminal of the second switch Q2 is connected to the first interface CH4 and the second power supply Vcc2. The second terminal of the second switch Q2 is also connected to the ground terminal.

[0075] The receiver control terminal USART2 RX and the voltage divider resistor network 231 are connected. The first end of the voltage divider resistor network 231 is connected to the first interface CH4, the second end of the voltage divider resistor network 231 is connected to the receiver control terminal USART2 RX, and the second end of the voltage divider resistor network 231 is grounded.

[0076] The carrier processing unit 230 is used for carrier signal interaction between the first communication module 200 and the screen display module 600. The core controls the carrier generation and the voltage divider network to extract the received signal by switching the transistor on and off. The carrier processing unit 230 consists of a transmitting branch and a receiving branch.

[0077] The transmit branch consists of the transmit control terminal USART2 TX, the first switch Q1, the second switch Q2, and the first current-limiting resistor R1. It is responsible for generating a carrier signal according to the instructions of the first control unit 210 and outputting it from the first interface CH4. The transmit control terminal USART2 TX receives the signal output by the first control unit 210. The first switch Q1 is an N-channel MOSFET. Its gate is connected to the transmit control terminal USART2 TX to control the conduction and cutoff of Q1. When the transmit control terminal USART2 TX outputs a high level, the first switch Q1 is turned on. The first power supply Vcc1 forms a loop through the first current-limiting resistor R1 to the first switch Q1 and then to the ground terminal. The drain of the first switch Q1 is pulled low, the second switch Q2 is turned off, and the level of the first interface CH4 is maintained at a high level by the second power supply Vcc2. When the USART2 TX output is low, the first switch Q1 is turned off and pulled high through the first current-limiting resistor R1. The second switch Q2 is turned on, and the first interface CH4 forms a loop to ground through the second switch Q2, pulling CH4 low. The first interface CH4 outputs an alternating high and low level carrier signal, which is transmitted to the screen display module 600 via CH4.

[0078] The receiving branch consists of the receiving control terminal USART2 RX and the voltage divider resistor network 231, responsible for extracting the externally input carrier signal from the first interface CH4 and transmitting it to the first control unit 210. The voltage divider resistor network 231 consists of a second resistor R2, a third resistor R3, and a fourth resistor R4. One end of the third resistor R3 is connected to the first interface CH4 via a Zener diode D, and the other end of the third resistor R3 is connected to the receiving control terminal USART2 RX via the second resistor R2. One end of the fourth resistor R4 is connected to the junction of the third resistor R3 and the second resistor R2, and the other end of the fourth resistor R4 is grounded. The function of the Zener diode D is to stabilize the input voltage near a specific value. When the input voltage is higher than its regulated value, the Zener diode D breaks down in reverse, clamping the voltage to its regulated value, thus protecting subsequent circuit components and preventing damage from overvoltage. When the screen display module 600 inputs a carrier signal through the first interface CH4, the voltage divider resistor network 231 performs voltage reduction adaptation on the level of the first interface CH4. If the first interface CH4 is high, the voltage level of the receive control terminal USART2 RX is determined by the voltage division ratio of the second resistor R2 and the fourth resistor R4. If the first interface CH4 is low, the voltage level of the receive control terminal USART2 RX is also pulled low. The divided signal is received by the receive control terminal USART2 RX and transmitted to the first control unit 210, completing the conversion of the external carrier signal to a level recognizable by the first control unit 210. For example, the first power supply Vcc1 is 3.3V, and the second power supply Vcc2 is +12V. Figure 5 In this context, GND represents the ground terminal.

[0079] Figure 6 This is a schematic diagram of the CAN communication signal processing circuit provided in an embodiment of this utility model. See also... Figure 6 Optionally, the first communication processing unit 220 includes:

[0080] The CAN controller 221 is used to connect to the first control unit 210 via the SPI bus; the CAN controller 221 is used to process the CAN protocol.

[0081] The CAN transceiver 222 is connected to the TXCAN and RXCAN terminals of the CAN controller 221. The CAN transceiver 222 is used to convert the signals transmitted between the CAN controller 221 and the bus 500.

[0082] The second interface 223 is connected to the CAN transceiver 222. The second interface 223 is used to connect to the bus 500, which includes the CAN bus.

[0083] Optionally, the first communication processing unit further includes:

[0084] The protection component 224 is connected between the CAN transceiver 222 and the second interface 223. The protection component 224 is used to protect the CAN transceiver 222.

[0085] The first communication processing unit 220 and the second communication processing unit 320 have the same structure.

[0086] The third power supply Vcc3 powers the CAN controller 221. The CAN controller 221's chip U1 is connected to the first control unit 210 via the SPI1 interface, which includes SPI1 NCS, SPI1 MISO, SPI1 MOSI, and SPI1 SCK. Chip U1 handles the CAN communication protocol. The OSC1 and OSC2 pins of chip U1 are connected to the two ends of crystal oscillator X. The VSS pin is grounded. The INT1# pin is connected to the INT1 interface via the fifth resistor R5, the INT0# pin is connected to the INT0 interface via the sixth resistor R6, the SCK pin is connected to the SPI1 SCK interface via the seventh resistor R7, the SDI pin is connected to the SPI1 MOSI interface via the eighth resistor R8, the SDO pin is connected to the SPI1 MISO interface via the ninth resistor R9, the nCS pin is connected to the SPI1NCS interface via the tenth resistor R10, and the VDD pin is connected to the third power supply Vcc3. Crystal oscillator X provides the clock signal to the CAN controller 221, ensuring the stability of the internal timing logic of the CAN controller 221. The first capacitor C1 and the second capacitor C2 stabilize the clock frequency output by crystal oscillator X. The fifth to tenth resistors (R5 to R10) serve to limit the current flowing through the pins of chip U1, preventing excessive current from damaging the pins of chip U1. For example, the third power supply Vcc3 is 3.3V.

[0087] The chip U2 of the CAN transceiver 222 performs bidirectional conversion between digital signals and CAN bus differential signals. Resistors R12 and R13 provide current limiting for the fourth power supply Vcc4 of the CAN transceiver 222 to prevent excessive current from damaging the chip. The TXD and RXD pins of chip U2 are connected to the TXCAN and RXCAN pins of the CAN controller 221 via resistors R14 and R15, respectively. The GND pin is grounded, the VCC pin is connected to the fifth power supply Vcc5, and the VIO pin is connected to the sixth power supply Vcc6. The CANL and CANH interfaces are both connected to the second interface 223, and the STBY pin is grounded via resistor R16. Resistors R14 and R15 form a voltage divider network to adapt the level logic between the CAN transceiver 222 and the CAN controller 221. Resistor R16 provides a pull-down resistor for the STBY pin of the CAN transceiver 222, ensuring that the CAN transceiver 222 operates in a non-standby state by default, guaranteeing normal communication. The third capacitor C3 and the fourth capacitor C4 filter the sixth power supply Vcc6, removing high-frequency noise from the power lines and providing a stable and clean power supply for the CAN transceiver 222. For example, the fourth power supply Vcc4 is 3.3V, the fifth power supply Vcc5 is +5V, and the sixth power supply Vcc6 is 3.3V.

[0088] The protection component 224 consists of a seventeenth resistor R17, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a sixth diode D6, and a seventh diode D7. The seventeenth resistor R17 limits current, while diodes D1 through D7 provide protection against transient high voltages on the CAN bus, thus protecting the CAN transceiver 222. Figure 6 In this context, GND represents the ground terminal.

[0089] In the above embodiments, the selection of each capacitor and resistor can be made according to actual needs, and no limitation is made here.

[0090] Secondly, this utility model embodiment also provides an electric welding machine, including: a control circuit as provided in any embodiment of this utility model, which has corresponding beneficial effects, and will not be described in detail here.

[0091] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A control circuit, characterized in that, include: The control panel is used to receive a first input signal, and the control module is used to connect to a load. At least one first communication module is connected between the control panel and the bus. The first communication module is used to convert the first input signal into a first communication signal and transmit the first communication signal to the bus. At least one second communication module is connected between the bus and the control module. The second communication module is used to receive the first communication signal and convert the first communication signal into a first control signal. The control module is used to control the load to work according to the first control signal.

2. The control circuit according to claim 1, characterized in that, The control circuit also includes: A screen display module is connected to the first communication module and / or the second communication module; The screen display module is used to display the status information of the control panel according to the first input signal and / or the first communication signal; the screen display module is also used to receive gesture operation signals, convert the gesture operation signals into second input signals, and display the second input signals.

3. The control circuit according to claim 2, characterized in that, At least one of the first communication modules is connected to the screen display module, and the at least one first communication module is used to convert the second input signal into a second communication signal and transmit it to the bus; The second communication module is connected to the bus and is used to receive the second communication signal and convert the second communication signal into a second control signal; the control module is used to control the load to work according to the second control signal.

4. The control circuit according to claim 2, characterized in that, At least one of the second communication modules is connected to the screen display module, and the at least one second communication module is used to convert the second input signal into a second control signal; and / or to generate a first display signal based on the first communication signal; The control module is used to control the load to work according to the second control signal; The screen display module is used to display the second input signal; And / or, based on the first display signal, display the operating status of the control panel.

5. The control circuit according to any one of claims 3 or 4, characterized in that, The first communication module includes a first communication processing unit and a first control unit. The first communication processing unit is connected between the bus and the first control unit. The first control unit is connected to the control panel and is used to receive a first input signal transmitted by the control panel. The first communication processing unit is used to convert the first input signal into a first communication signal when transmitting. The second communication module includes a second communication processing unit and a second control unit. The second communication processing unit is connected between the bus and the second control unit, and the second control unit is connected to the control module. The second communication processing unit is used to convert a first communication signal transmitted by the bus into a first control signal upon receiving a signal; and / or to convert a second communication signal transmitted by the bus into a second control signal. The second control unit is used to transmit the first control signal and / or the second control signal to the control module.

6. The control circuit according to claim 5, characterized in that, The first communication module further includes: A carrier processing unit is connected to the first control unit and is configured to connect to the screen display module; the carrier processing unit is configured to generate a first carrier signal based on the first input signal; or, receive a second input signal and generate a second carrier signal based on the second input signal. The screen display module is used to display the status information of the control panel according to the first carrier signal; and / or, to display the status information of the screen display module according to the second carrier signal; wherein the status information includes the target voltage and target current input to the control module.

7. The control circuit according to claim 6, characterized in that, The carrier processing unit includes: The first interface is used to connect to the screen display module; The system comprises a transmission control terminal, a first switching transistor, a second switching transistor, and a first current-limiting resistor. The transmission control terminal is connected to the first control unit. The control electrode of the first switching transistor is connected to the transmission control terminal. The first electrode of the first switching transistor is connected to a first power supply terminal through the first current-limiting resistor and is also connected to the control electrode of the second switching transistor. The second electrode of the first switching transistor is connected to a ground terminal. The first electrode of the second switching transistor is connected to the first interface and the second power supply terminal, and the second electrode of the second switching transistor is also connected to the ground terminal. The system includes a receiving control terminal and a voltage divider resistor network. The first end of the voltage divider resistor network is connected to the first interface, the second end of the voltage divider resistor network is connected to the receiving control terminal, and the second end of the voltage divider resistor network is grounded.

8. The control circuit according to claim 5, characterized in that, The first communication processing unit includes: A CAN controller is used to connect to the first control unit via an SPI bus; the CAN controller is used to process the CAN protocol. A CAN transceiver is connected to the TXCAN and RXCAN terminals of the CAN controller. The CAN transceiver is used to convert the signals transmitted by the CAN controller and the bus. The second interface is connected to the CAN transceiver and is used to connect to the bus, which includes the CAN bus.

9. The control circuit according to claim 8, characterized in that, The first communication processing unit further includes: A protective component is connected between the CAN transceiver and the second interface, and the protective component is used to protect the CAN transceiver; The first communication processing unit and the second communication processing unit have the same structure.

10. An electric welding machine, characterized in that, include: The control circuit according to any one of claims 1 to 9.

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