Welding robot power supply system

Abstract

This disclosure provides a power supply system for a welding robot, belonging to the field of power supply technology. The power supply system includes: a voltage detection module, a peak value detection module, a frequency detection module, a power switching module, a logic judgment module, a main power supply module, and a backup power supply module. The input terminal of the voltage detection module is connected to the main power supply module, and the output terminal of the voltage detection module is connected to the input terminals of both the peak value detection module and the frequency detection module. The output terminal of the peak value detection module is connected to the logic judgment module. The output terminal of the frequency detection module is connected to the logic judgment module. The output terminal of the logic judgment module is connected to the control terminal of the power switching module. The first terminal of the power switching module is connected to the main power supply module, and the second terminal is connected to the backup power supply module. The third terminal of the power switching module is used to connect to the power supply terminal of the welding robot. This disclosure can improve the power supply stability of the welding robot during welding operations.

Description

Technical Field

[0001] This disclosure relates to the field of power supply technology, and in particular to a power supply system for a welding robot. Background Technology

[0002] In modern industrial manufacturing, the automation level of welding operations continues to increase, and the application of welding robots is becoming increasingly widespread. The stable operation of welding robots is highly dependent on a reliable power supply system.

[0003] However, the industrial environment is complex and ever-changing. The power supply of welding robots is affected by various factors such as power grid fluctuations, electrical interference, and short circuit faults, which can lead to problems such as unstable voltage and abnormal frequency, thereby affecting the normal operation of the welding robot and even damaging the equipment.

[0004] Therefore, a power supply system is needed that can monitor the status of the main power supply in real time and quickly switch to the backup power supply when the main power supply fails, in order to improve the power supply stability of the welding robot. Utility Model Content

[0005] This disclosure provides a power supply system for a welding robot to improve the power supply stability of the welding robot during welding operations.

[0006] This disclosure provides a power supply system for a welding robot, including: a voltage detection module, a peak detection module, a frequency detection module, a power switching module, a logic judgment module, a main power supply module, and a backup power supply module;

[0007] The input terminal of the voltage detection module is connected to the main power supply module, and the output terminal of the voltage detection module is connected to the input terminal of the peak detection module and the input terminal of the frequency detection module, respectively. The output terminal of the peak detection module is connected to the first input terminal of the logic judgment module. The output terminal of the frequency detection module is connected to the second input terminal of the logic judgment module. The output terminal of the logic judgment module is connected to the control terminal of the power switching module.

[0008] The first end of the power switching module is connected to the main power module, the second end of the power switching module is connected to the backup power module, and the third end of the power switching module is used to connect to the power supply end of the welding robot.

[0009] In one exemplary embodiment of this disclosure, the voltage detection module includes:

[0010] The current transformer L1 is configured to detect the current of the main power module;

[0011] The first terminal of the current transformer L1 is connected to the first terminal of the resistor R1, and the second terminal of the current transformer L1 is connected to the second terminal of the resistor R1; the first terminal of the resistor R1 is connected to the first terminal of the capacitor C3, and the second terminal of the resistor R1 is connected to the second terminal of the capacitor C3; the second terminal of the capacitor C3 is used for grounding.

[0012] The first terminal of capacitor C3 is connected to the first terminal of resistor R12, the second terminal of resistor R12 is connected to the inverting input terminal of operational amplifier U1, the non-inverting input terminal of operational amplifier U1 is used to receive the reference signal Vref, and the output terminal of operational amplifier U1 is connected to the cathode of diode D1 and the anode of diode D2 respectively.

[0013] The inverting input terminal of the operational amplifier U1 is connected to the anode of the diode D1 and the first terminal of the resistor R13, respectively; the second terminal of the resistor R13 is connected to the cathode of the diode D2, and the cathode of the diode D2 serves as the output terminal of the voltage detection module.

[0014] In one exemplary embodiment of this disclosure, the peak detection module includes:

[0015] Operational amplifier U4, resistor R3, diode D3, diode D4, capacitor C2, and operational amplifier U5;

[0016] The non-inverting input terminal of the operational amplifier U4 is connected to the output terminal of the voltage detection module, the inverting input terminal of the operational amplifier U4 is connected to the first terminal of the resistor R3 and the anode of the diode D3, and the output terminal of the operational amplifier U4 is connected to the cathode of the diode D3 and the anode of the diode D4.

[0017] The cathode of the diode D4 is connected to the first terminal of the capacitor C2 and the non-inverting input terminal of the operational amplifier U5, respectively; the second terminal of the capacitor C2 is used for grounding; the inverting input terminal of the operational amplifier U5 is connected to the second terminal of the resistor R3 and the output terminal of the operational amplifier U5, respectively, and the output terminal of the operational amplifier U5 serves as the output terminal of the peak detection module.

[0018] In one exemplary embodiment of this disclosure, the frequency detection module includes:

[0019] Resistors R5, R6, voltage comparator U2, R8, and R7;

[0020] The first end of resistor R5 is used to connect to power supply VDD, and the second end of resistor R5 is connected to the first end of resistor R6, the inverting input of voltage comparator U2, and the first end of resistor R8, respectively.

[0021] The second end of resistor R6, the negative power supply terminal of voltage comparator U2, and the ground terminal of voltage comparator U2 are all used for grounding; the non-inverting input terminal of voltage comparator U2 is connected to the output terminal of the voltage detection module; the positive power supply terminal of voltage comparator U2 is used to connect to power supply VCC; the output terminal of voltage comparator U2 is connected to the second end of resistor R8 and the first end of resistor R7 respectively; the second end of resistor R7 is used to connect to power supply VDD; and the output terminal of voltage comparator U2 serves as the output terminal of the frequency detection module.

[0022] In one exemplary embodiment of this disclosure, the logic judgment module includes:

[0023] Diode D5, diode D6, resistor R11, and transistor U3;

[0024] The anode of diode D5 is connected to the output terminal of the peak detection module, and the cathode of diode D5 is connected to the base of transistor U3.

[0025] The anode of diode D6 is connected to the output terminal of the frequency detection module, the cathode of diode D6 is connected to the base of transistor U3, the collector of transistor U3 is connected to power supply VCC, the emitter of transistor U3 is grounded through resistor R11, and the emitter of transistor U3 is connected to the control terminal of the power switching module.

[0026] In one exemplary embodiment of this disclosure, the power switching module includes:

[0027] Relay K1;

[0028] The first power supply terminal of the relay K1 is connected to the emitter of the transistor U3, the second power supply terminal of the relay K1 is grounded, the first terminal of the relay K1 is connected to the main power supply module, the second terminal of the relay K1 is connected to the backup power supply module, and the third terminal of the relay K1 is used to connect to the power supply terminal of the welding robot.

[0029] In one exemplary embodiment of this disclosure, the welding robot power supply system further includes:

[0030] Anti-interference power supply module;

[0031] The first end of the anti-interference power supply module is connected to the third end of the power switching module, and the second end of the anti-interference power supply module is used to connect to the power supply end of the welding robot.

[0032] The beneficial effects of the welding robot power supply system provided in this disclosure are as follows: the voltage detection module, peak detection module, and frequency detection module form a multi-dimensional monitoring network, which can capture abnormal signals such as power grid fluctuations, instantaneous pulses, and frequency deviations in real time, improving the accuracy of early warning. The logic judgment module can quickly complete power switching decisions, ensuring that the welding arc remains stably burning during power switching. The redundancy design of the main and backup power supplies, combined with fast switching technology, improves power supply reliability and effectively avoids weld defects and robot downtime caused by voltage dips. This disclosure can improve the reliability of welding power supply, thereby ensuring the stability of welding commands. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a welding robot power supply system provided in an embodiment of this disclosure;

[0035] Figure 2 This is a schematic diagram of another welding robot power supply system provided in an embodiment of this disclosure. Detailed Implementation

[0036] To enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this solution, not all of them. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this solution.

[0037] The term "comprising" and any other variations thereof in the specification, claims, and accompanying drawings of this invention mean "including but not limited to," and are intended to cover a non-exclusive inclusion, not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order.

[0038] The implementation of this disclosure will be described in detail below with reference to the specific accompanying drawings:

[0039] Figure 1 This is a schematic diagram of a power supply system for a welding robot provided in an embodiment of this disclosure. (Refer to...) Figure 1The power supply system for the welding robot includes: a voltage detection module, a peak detection module, a frequency detection module, a power switching module, a logic judgment module, a main power supply module, and a backup power supply module.

[0040] The input terminal of the voltage detection module is connected to the main power supply module, and the output terminal of the voltage detection module is connected to the input terminals of the peak detection module and the frequency detection module, respectively. The output terminal of the peak detection module is connected to the first input terminal of the logic judgment module. The output terminal of the frequency detection module is connected to the second input terminal of the logic judgment module. The output terminal of the logic judgment module is connected to the control terminal of the power switching module.

[0041] The first terminal of the power switching module is connected to the main power module, and the second terminal is connected to the backup power module. The third terminal of the power switching module is used to connect to the power supply terminal of the welding robot.

[0042] In this embodiment, the logic judgment module is configured to perform logical judgments on the output signals of the peak detection module and the frequency detection module. The power switching module is configured to switch between the main power module and the backup power module to supply power to the welding robot. The main power module provides conventional operating power to the welding robot. The voltage detection module monitors the AC voltage output by the main power module in real time, converts it into a corresponding electrical signal, and transmits it to the peak detection module and the frequency detection module.

[0043] The peak detection module judges the input voltage data, detects the peak value of the voltage, and transmits the peak value data to the first input terminal of the logic judgment module. The frequency detection module processes the input voltage data, detects the frequency information of the voltage, and transmits the frequency data to the second input terminal of the logic judgment module.

[0044] The logic judgment module acquires the peak value and frequency information output by the peak value detection module and the frequency detection module, and outputs a control signal based on the peak value and frequency information, which is then transmitted to the power switching module. For example, if the detected peak value exceeds the normal voltage peak value range or the frequency signal exceeds the frequency standard range, it is determined that the main power supply is abnormal, and a control signal is output.

[0045] After receiving the control signal from the logic judgment module, the power switching module performs a power switching operation accordingly. For example, when the logic judgment module determines that the main power supply is normal, it controls the power switching module to maintain the connection between the main power module and the welding robot, allowing the main power supply to power the robot. If the main power supply is determined to be abnormal, the power switching module disconnects the main power supply and connects the backup power module, allowing the backup power supply to power the welding robot and ensuring that the operation of the welding robot is not affected by the main power supply failure. When the main power module returns to normal, the logic judgment module can control the power switching module to switch back to the main power module for power supply.

[0046] For example, this embodiment sets up multiple detection modules to work together, which can monitor the status of the main power supply in real time and comprehensively. When the main power supply is abnormal, the power switching module can quickly switch to the backup power supply, reducing the downtime of the welding robot caused by power problems, ensuring the continuity of welding work, and improving production efficiency.

[0047] The peak voltage detection module can promptly detect excessively high voltage peaks, preventing damage to sensitive electronic components inside the welding robot, reducing the risk of equipment failure, extending equipment lifespan, and lowering maintenance costs. Stable power supply and precise frequency monitoring provide a stable operating environment for the welding robot's control system and actuators, helping to improve welding accuracy and quality, reduce defect rates, and enhance overall product quality. This embodiment effectively addresses common issues in industrial environments such as power grid fluctuations and electrical interference, enabling the welding robot to operate stably even under complex working conditions.

[0048] In this embodiment, the voltage detection module, peak detection module, and frequency detection module form a multi-dimensional monitoring network, which can capture abnormal signals such as power grid fluctuations, instantaneous pulses, and frequency deviations in real time, improving the accuracy of early warning. The logic judgment module can quickly complete power switching decisions, ensuring that the welding arc remains stably burning during power switching. The redundancy design of the main and backup power supplies, combined with fast switching technology, improves power supply reliability and effectively avoids weld defects and robot downtime caused by voltage dips. This disclosure can improve the reliability of welding power supply, thereby ensuring the stability of welding commands.

[0049] like Figure 2 As shown, in one embodiment of this disclosure, the voltage detection module includes:

[0050] Current transformer L1, resistor R1, capacitor C3, resistor R12, operational amplifier U1, diode D1, diode D2 and resistor R13.

[0051] Current transformer L1 is configured to detect the current of the main power module.

[0052] The first terminal of current transformer L1 is connected to the first terminal of resistor R1, and the second terminal of current transformer L1 is connected to the second terminal of resistor R1. The first terminal of resistor R1 is connected to the first terminal of capacitor C3, and the second terminal of resistor R1 is connected to the second terminal of capacitor C3. The second terminal of capacitor C3 is used for grounding.

[0053] The first terminal of capacitor C3 is connected to the first terminal of resistor R12, the second terminal of resistor R12 is connected to the inverting input terminal of operational amplifier U1, the non-inverting input terminal of operational amplifier U1 is used to receive the reference signal Vref, and the output terminal of operational amplifier U1 is connected to the cathode of diode D1 and the anode of diode D2 respectively.

[0054] The inverting input of operational amplifier U1 is connected to the anode of diode D1 and the first terminal of resistor R13. The second terminal of resistor R13 is connected to the cathode of diode D2, which serves as the output of the voltage detection module.

[0055] In this embodiment, the current transformer L1 detects the current of the main power module. The two ends of the current transformer L1 are connected to the two ends of the resistor R1 respectively to form a closed loop. At this time, a voltage proportional to the current of the main power module will be generated on the resistor R1, thereby converting the current signal into voltage.

[0056] When the input voltage signal is in its positive half-cycle and its amplitude is higher than the reference voltage Vref, the output of operational amplifier U1 is high. At this time, diode D2 is turned on, D1 is turned off, and current flows through D2 and the load to form a loop, so the output voltage follows the positive half-cycle of the input signal.

[0057] When the input signal is in the negative half-cycle or the amplitude is lower than the reference voltage Vref, the output of op-amp U1 is low. At this time, diode D1 is turned on and D2 is turned off. Current flows through D1 and resistor R13 to form a feedback loop, making the op-amp in a deep negative feedback state. The output voltage is clamped to a potential close to zero, which is equivalent to "rectifying" the negative half-cycle signal.

[0058] Resistor R12 limits the current, preventing excessive current from flowing into the input terminal of the op-amp and damaging it. Resistor R13 is the feedback resistor; it forms a negative feedback loop with op-amp U1, stabilizing the op-amp's gain and ensuring the circuit can stably perform its rectification function.

[0059] like Figure 2 As shown, in one embodiment of this disclosure, the peak detection module includes:

[0060] Op-amp U4, resistor R3, diode D3, diode D4, capacitor C2, and op-amp U5.

[0061] The non-inverting input of operational amplifier U4 is connected to the output of the voltage detection module. The inverting input of operational amplifier U4 is connected to the first terminal of resistor R3 and the anode of diode D3. The output of operational amplifier U4 is connected to the cathode of diode D3 and the anode of diode D4.

[0062] The cathode of diode D4 is connected to the first terminal of capacitor C2 and the non-inverting input terminal of operational amplifier U5. The second terminal of capacitor C2 is grounded. The inverting input terminal of operational amplifier U5 is connected to the second terminal of resistor R3 and the output terminal of operational amplifier U5. The output terminal of operational amplifier U5 serves as the output terminal of the peak detection module.

[0063] In this embodiment, the non-inverting input of operational amplifier U4 receives a signal from the voltage detection module reflecting the voltage state of the main power supply module. When the signal voltage at the non-inverting input is higher than that at the inverting input, operational amplifier U4 outputs a high level, causing diode D3 to conduct and D4 to be cut off. Current flows through D3 to charge capacitor C2, and the voltage across capacitor C2 gradually increases.

[0064] When the output signal voltage of the voltage detection module decreases and falls below the voltage across capacitor C2, operational amplifier U4 outputs a low level, and D3 is cut off. Since capacitor C2 stores charge, D4 ​​is turned on at this time. Capacitor C2 discharges through the loop formed by the non-inverting input terminal, the inverting input terminal, and resistor R3 of operational amplifier U5. However, because the inverting input terminal of operational amplifier U5 is connected to the output terminal, forming a voltage follower, the discharge speed of capacitor C2 is extremely slow, which can maintain the peak voltage during charging.

[0065] Operational amplifier U5 amplifies the peak voltage across capacitor C2 and outputs it from its output terminal. This output signal represents the peak voltage information of the main power module, providing a basis for judgment in subsequent logic judgment modules.

[0066] This embodiment, through the synergistic effect of operational amplifier U4, diodes D3 and D4, and capacitor C2, accurately captures and maintains the peak voltage of the input signal. For the welding robot power supply system, this allows for timely detection of abnormal peak values ​​in the main power supply voltage, providing accurate information for subsequent power switching and fault diagnosis. The voltage follower formed by operational amplifier U5 ensures that the peak voltage signal is output to subsequent circuits stably and without attenuation, improving the reliability of signal transmission and guaranteeing the stability and reliability of the entire power supply system. The energy storage function of capacitor C2 allows the circuit to maintain the peak voltage even when the input signal fluctuates, reducing the impact of interference signals on peak detection, enhancing the system's anti-interference capability, and enabling the welding robot to operate stably in complex industrial environments.

[0067] like Figure 2 As shown, in one embodiment of this disclosure, the frequency detection module includes:

[0068] Resistors R5, R6, voltage comparator U2, R8, and R7.

[0069] The first end of resistor R5 is connected to the power supply VDD. The second end of resistor R5 is connected to the first end of resistor R6, the inverting input of voltage comparator U2, and the first end of resistor R8, respectively.

[0070] The second terminal of resistor R6, the negative power supply terminal of voltage comparator U2, and the ground terminal of voltage comparator U2 are all used for grounding. The non-inverting input terminal of voltage comparator U2 is connected to the output terminal of the voltage detection module. The positive power supply terminal of voltage comparator U2 is connected to power supply VCC, and the output terminal of voltage comparator U2 is connected to the second terminal of resistor R8 and the first terminal of resistor R7, respectively. The second terminal of resistor R7 is connected to power supply VDD, and the output terminal of voltage comparator U2 serves as the output terminal of the frequency detection module.

[0071] In this embodiment, the power supply VDD provides a bias voltage to the circuit through resistor R5. After being divided by resistor R6, this voltage provides a fixed reference voltage to the inverting input of voltage comparator U2.

[0072] The voltage detection module outputs a signal reflecting the voltage status of the main power module, which is connected to the non-inverting input of voltage comparator U2. When the voltage signal at the non-inverting input is higher than the reference voltage at the inverting input, voltage comparator U2 outputs a high level. When the voltage signal at the non-inverting input is lower than the reference voltage at the inverting input, voltage comparator U2 outputs a low level.

[0073] Thus, as the main power module voltage changes periodically, the output of voltage comparator U2 will generate a series of alternating high and low level pulse signals. The circuit composed of resistors R8 and R7 processes the output signal of voltage comparator U2, with resistor R7 acting as a pull-up resistor to ensure that the output signal can be stabilized between the power supply VDD and ground.

[0074] Ultimately, the frequency of the pulse signal output from the voltage comparator U2 is related to the frequency of the main power module voltage change. By detecting and analyzing the frequency of this pulse signal, the frequency information of the main power module voltage can be obtained, providing data support for subsequent logic judgment modules. The frequency detection module in this embodiment has a simple circuit structure and low cost, while also being able to quickly and accurately detect the frequency of the input signal. The frequency detection module can monitor the frequency of the output signal from the voltage detection module in real time, promptly detecting abnormal changes in the main power frequency, ensuring the stability of the main power frequency, and preventing frequency anomalies from affecting the normal operation of the welding robot. The resistive elements and voltage comparator in the circuit have high stability and reliability, enabling them to work stably in complex industrial environments, ensuring the reliable operation of the welding robot.

[0075] like Figure 2 As shown, in one embodiment of this disclosure, the logic judgment module includes:

[0076] Diode D5, diode D6, resistor R11, and transistor U3.

[0077] The anode of diode D5 is connected to the output terminal of the peak detection module, and the cathode of diode D5 is connected to the base of transistor U3.

[0078] The anode of diode D6 is connected to the output terminal of the frequency detection module, the cathode of diode D6 is connected to the base of transistor U3, the collector of transistor U3 is used to connect to the power supply VCC, the emitter of transistor U3 is grounded through resistor R11, and the emitter of transistor U3 is connected to the control terminal of the power switching module.

[0079] In this embodiment, the logic judgment module can control the power switching based on the output signals of the peak detection module and the frequency detection module.

[0080] The peak detection module outputs a signal reflecting the peak value of the main power supply voltage, which is transmitted to the base of transistor U3 via diode D5. The frequency detection module outputs a signal representing the frequency of the main power supply voltage, which is also transmitted to the base of transistor U3 via diode D6.

[0081] Under normal circumstances, the peak value and frequency of the main power supply voltage are within a reasonable range. At this time, the signals output by the peak detection module and the frequency detection module keep the base of transistor U3 at a low potential, and transistor U3 is in the cutoff state. Its emitter outputs a low-level signal to the control terminal of the power switching module, and the power switching module maintains the main power supply module to supply power to the welding robot.

[0082] When either the peak value or the frequency of the main power supply voltage exceeds the normal range, the peak detection module or the frequency detection module will output a high-level signal. This causes the base of transistor U3 to become high through the corresponding diode (D5 or D6), turning on transistor U3. At this time, the emitter of transistor U3 is grounded through resistor R11, and the emitter outputs a high-level signal to the control terminal of the power switching module. Upon receiving the signal, the power switching module switches the power supply from the main power module to the backup power module.

[0083] This embodiment uses a logic circuit composed of diodes and transistors to monitor the peak voltage and frequency of the main power supply in real time. If an abnormality occurs, the power supply will be switched quickly to avoid power outages to the welding robot due to main power supply problems, thus ensuring the continuous operation of welding work.

[0084] Diodes D5 and D6 serve as isolation and protection in the circuit, preventing signals from different detection modules from interfering with each other, while also avoiding damage to the circuit from reverse voltage, thus improving the stability and reliability of the logic judgment module.

[0085] like Figure 2 As shown, in one embodiment of this disclosure, the power switching module includes:

[0086] Relay K1.

[0087] The first power supply terminal of relay K1 is connected to the emitter of transistor U3, the second power supply terminal of relay K1 is grounded, the first terminal of relay K1 is connected to the main power supply module, the second terminal of relay K1 is connected to the backup power supply module, and the third terminal of relay K1 is used to connect to the power supply terminal of the welding robot.

[0088] In this embodiment, the operating state of relay K1 is controlled by the emitter output signal of transistor U3. During normal operation, transistor U3 in the logic judgment module is in the off state, its emitter outputs a low level, and no current flows through the control terminal of relay K1, maintaining the relay's initial state. At this time, the first and third terminals of relay K1 are connected, the main power supply module supplies power to the welding robot via relay K1, and the backup power supply module is in the off state.

[0089] When the main power module experiences a voltage peak or frequency anomaly, transistor U3 in the logic judgment module conducts, its emitter outputs a high level, and current flows through the control terminal of relay K1, generating an electromagnetic attraction. Under the action of the electromagnetic force, the contacts of relay K1 actuate, disconnecting the first and third terminals and connecting the second and third terminals, allowing the backup power module to start supplying power to the welding robot, thus achieving power switching.

[0090] This embodiment utilizes relays for power switching, offering high reliability and ensuring a timely and stable switch to backup power in the event of a main power failure, thus guaranteeing the normal operation of the welding robot. Relays also provide electrical isolation between the control circuit and the main power supply circuit, preventing damage to the control circuit from high voltage and high current in the main circuit, thereby improving system safety.

[0091] like Figure 2 As shown, in one embodiment of this disclosure, the welding robot power supply system further includes:

[0092] Anti-interference power supply module.

[0093] The first end of the anti-interference power supply module is connected to the third end of the power switching module, and the second end of the anti-interference power supply module is used to connect to the power supply end of the welding robot.

[0094] In this embodiment, the power signal output from the third terminal of the power switching module enters the anti-interference power supply module. The anti-interference power supply module may include a filtering circuit, such as an LC filter circuit composed of inductors and capacitors. When the power signal flows in, the filtering circuit can filter out high-frequency noise and electromagnetic interference. Because a large amount of electromagnetic interference is generated during the welding process, if this interference enters the power supply terminal of the welding robot, it may affect the normal operation of the robot's internal electronic components. The anti-interference power supply module bypasses these interference signals to ground, making the power signal output to the welding robot's power supply terminal cleaner and more stable.

[0095] The anti-interference power supply module in this embodiment improves the stability of the welding robot's operation, reduces program errors and abnormal movements caused by power interference, and ensures welding quality. This embodiment also enhances the reliability of the entire power supply system, enabling the welding robot to operate continuously and stably even in complex electromagnetic environments, reducing equipment downtime maintenance costs and improving production efficiency.

[0096] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of this disclosure.

Claims

1. A power supply system for a welding robot, characterized in that, include: Voltage detection module, peak detection module, frequency detection module, power switching module, logic judgment module, main power supply module and backup power supply module; The input terminal of the voltage detection module is connected to the main power supply module, and the output terminal of the voltage detection module is connected to the input terminal of the peak detection module and the input terminal of the frequency detection module, respectively. The output terminal of the peak detection module is connected to the first input terminal of the logic judgment module. The output terminal of the frequency detection module is connected to the second input terminal of the logic judgment module. The output terminal of the logic judgment module is connected to the control terminal of the power switching module. The first end of the power switching module is connected to the main power module, the second end of the power switching module is connected to the backup power module, and the third end of the power switching module is used to connect to the power supply end of the welding robot.

2. The welding robot power supply system as described in claim 1, characterized in that, The voltage detection module includes: Current transformer L1, resistor R1, capacitor C3, resistor R12, operational amplifier U1, diode D1, diode D2 and resistor R13; The current transformer L1 is configured to detect the current of the main power module; The first terminal of the current transformer L1 is connected to the first terminal of the resistor R1, and the second terminal of the current transformer L1 is connected to the second terminal of the resistor R1; the first terminal of the resistor R1 is connected to the first terminal of the capacitor C3, and the second terminal of the resistor R1 is connected to the second terminal of the capacitor C3; the second terminal of the capacitor C3 is used for grounding. The first terminal of capacitor C3 is connected to the first terminal of resistor R12, the second terminal of resistor R12 is connected to the inverting input terminal of operational amplifier U1, the non-inverting input terminal of operational amplifier U1 is used to receive the reference signal Vref, and the output terminal of operational amplifier U1 is connected to the cathode of diode D1 and the anode of diode D2 respectively. The inverting input terminal of the operational amplifier U1 is connected to the anode of the diode D1 and the first terminal of the resistor R13, respectively; the second terminal of the resistor R13 is connected to the cathode of the diode D2, and the cathode of the diode D2 serves as the output terminal of the voltage detection module.

3. The welding robot power supply system as described in claim 1, characterized in that, The peak detection module includes: Operational amplifier U4, resistor R3, diode D3, diode D4, capacitor C2, and operational amplifier U5; The non-inverting input terminal of the operational amplifier U4 is connected to the output terminal of the voltage detection module, the inverting input terminal of the operational amplifier U4 is connected to the first terminal of the resistor R3 and the anode of the diode D3, and the output terminal of the operational amplifier U4 is connected to the cathode of the diode D3 and the anode of the diode D4. The cathode of the diode D4 is connected to the first terminal of the capacitor C2 and the non-inverting input terminal of the operational amplifier U5, respectively; the second terminal of the capacitor C2 is used for grounding; the inverting input terminal of the operational amplifier U5 is connected to the second terminal of the resistor R3 and the output terminal of the operational amplifier U5, respectively, and the output terminal of the operational amplifier U5 serves as the output terminal of the peak detection module.

4. The welding robot power supply system as described in claim 1, characterized in that, The frequency detection module includes: Resistors R5, R6, voltage comparator U2, R8, and R7; The first end of resistor R5 is used to connect to power supply VDD, and the second end of resistor R5 is connected to the first end of resistor R6, the inverting input of voltage comparator U2, and the first end of resistor R8, respectively. The second end of resistor R6, the negative power supply terminal of voltage comparator U2, and the ground terminal of voltage comparator U2 are all used for grounding; the non-inverting input terminal of voltage comparator U2 is connected to the output terminal of the voltage detection module; the positive power supply terminal of voltage comparator U2 is used to connect to power supply VCC; the output terminal of voltage comparator U2 is connected to the second end of resistor R8 and the first end of resistor R7 respectively; the second end of resistor R7 is used to connect to power supply VDD; and the output terminal of voltage comparator U2 serves as the output terminal of the frequency detection module.

5. The welding robot power supply system as described in claim 1, characterized in that, The logical judgment module includes: Diode D5, diode D6, resistor R11, and transistor U3; The anode of diode D5 is connected to the output terminal of the peak detection module, and the cathode of diode D5 is connected to the base of transistor U3. The anode of diode D6 is connected to the output terminal of the frequency detection module, the cathode of diode D6 is connected to the base of transistor U3, the collector of transistor U3 is connected to power supply VCC, the emitter of transistor U3 is grounded through resistor R11, and the emitter of transistor U3 is connected to the control terminal of the power switching module.

6. The welding robot power supply system as described in claim 5, characterized in that, The power switching module includes: Relay K1; The first power supply terminal of the relay K1 is connected to the emitter of the transistor U3, the second power supply terminal of the relay K1 is grounded, the first terminal of the relay K1 is connected to the main power supply module, the second terminal of the relay K1 is connected to the backup power supply module, and the third terminal of the relay K1 is used to connect to the power supply terminal of the welding robot.

7. The welding robot power supply system as described in claim 1, characterized in that, Also includes: Anti-interference power supply module; The first end of the anti-interference power supply module is connected to the third end of the power switching module, and the second end of the anti-interference power supply module is used to connect to the power supply end of the welding robot.

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