An 11V-110V switching power supply suitable for arc voltage induction wire feeders

Abstract

This utility model relates to a 11V-110V switching power supply suitable for arc voltage induction wire feeders. The power supply circuit includes PCB CIRCLE1, PCB CIRCLE2, PCB CIRCLE3, PCB CIRCLE4, and PCB CIRCLE5. When the input voltage is 11-110V, the voltage rectified by VD1-VD4 is supplied to U1 by R6 with current limiting. Simultaneously, voltage is supplied to U1 through R46, Q2, CR10, and CR2. Once the required starting voltage is met, U1 starts and outputs a drive voltage. The voltage output from windings 5 ​​and 6 via D11 is used by U1. U4 continuously detects the voltage output from windings 7 and 8 via D4. After passing through R3, R4, R1, and R2, U3 compares and controls the output voltage, thereby controlling the voltage output of the entire circuit. This increases the power supply voltage range of the arc voltage induction wire feeder to adapt to the voltage requirements of new welding processes.

Description

Technical Field

[0001] This utility model relates to 11V-110V switching power supplies, and in particular to an 11V-110V switching power supply suitable for arc voltage induction wire feeders. Background Technology

[0002] An arc voltage induction wire feeder is a device that adjusts the wire feeding speed by detecting changes in arc voltage during the welding process to maintain the stability of the welding process. Its working principle is as follows: it automatically adjusts the wire feeding speed by detecting the arc voltage to maintain a stable arc length. When the arc length changes, causing a change in arc voltage, the system will feed this signal back and adjust the wire feeding speed to restore the arc length to the initial set value, forming a closed-loop control.

[0003] Chinese utility model patent CN201010508081.8 discloses an arc voltage induction wire feeder. Under the regulation and control of the motor speed regulation and welding timing control module, it provides a stable voltage to the printed winding motor, which can feed the wire smoothly. Moreover, the welding power supply can provide a stable power supply voltage under any static external characteristic mode (constant current / constant voltage), and can control the wire feeding speed and arc length, thereby improving the welding quality.

[0004] With the rapid development of welding machines, arc voltage induction wire feeders will also be further developed and updated, and the precision requirements for arc voltage induction wire feeders will be further improved. The power supply voltage range of traditional arc voltage induction wire feeders is only (15-100V), which cannot adapt to the voltage requirements of new welding processes (11-110V). This urgently requires a reliable, low-cost switching power supply with very low input voltage and a wide adjustment range to match it. Utility Model Content

[0005] The technical problem that this utility model aims to solve in view of the above-mentioned prior art is that the power supply voltage range of traditional arc voltage induction wire feeders is only 15-100V, which cannot adapt to the voltage requirements of new welding processes.

[0006] To solve the above problems, this utility model provides an 11V-110V switching power supply suitable for arc voltage induction wire feeders, including a power supply circuit. The power supply circuit includes PCB CIRCLE1, PCB CIRCLE2, PCB CIRCLE3, and PCB CIRCLE4 areas. The power supply circuit, except for PCB CIRCLE1, PCB CIRCLE2, PCB CIRCLE3, and PCB CIRCLE4 areas, is divided into PCB CIRCLE5 areas. PCB CIRCLE5 areas include a T1 switching power supply transformer, primary windings 1 and 3, feedback windings 5 ​​and 6, output windings 7 and 8, and feedback voltage windings.

[0007] PCB CIRCLE5 is electrically connected to PCB CIRCLE1 and PCB CIRCLE2 respectively, PCB CIRCLE2 is electrically connected to PCB CIRCLE3, and PCB CIRCLE3 is electrically connected to PCB CIRCLE4.

[0008] In the aforementioned 11V-110V switching power supplies suitable for arc voltage induction wire feeders, the power supply voltage range of the arc voltage induction wire feeder is increased to adapt to the voltage requirements of the new welding process.

[0009] As a further improvement of this application, within the PCB CIRCLE5 area, PCBCIRCLE5 is a switching inverter circuit, 3V2IRF260 is a power switch transistor, VD1~VD4 are input rectifier transistors, C5 is an input filter capacitor, R6 is a detection input, and the input voltage is also provided to U1 through R46, Q2, CR10 and CR2 to ensure reliable startup of the switching power supply throughout the entire range.

[0010] 3V2 is the power switch transistor, R22 is the current limiting resistor to ensure that the switch transistor is not damaged by overcurrent, U1 and the surrounding circuit provide the drive pulse for the switch transistor, U4 and the surrounding circuit provide the feedback signal to ensure the stable operation of the circuit, and R16, C2 and D8 are peak absorption circuits to protect 3V2 from being broken down by high voltage.

[0011] As a further improvement to this application, the input voltage in the PCB CIRCLE1 area is regulated to 10V after passing through R46, Q2, CR10 and CR2, which powers the U1 circuit to start the switching power supply and provides the starting voltage for the auxiliary part of the switching power supply.

[0012] As a further improvement of this application, D4 in the PCB CIRCLE2 area is a fast rectifier diode, which performs rectification to convert AC to DC. C10 and C49 are output filter capacitors, which perform energy storage. U5 adopts a DC / DC converter chip with an operating frequency of 150KHz. The input voltage is input through pin 1 of U5 and output as +12V, 3A current through inductor L1 from pin 2 of U5. R36 and R37 are voltage feedback circuits. R2LED1 visually indicates whether the switching power supply is working. When working, the light is on. The PCB CIRCLE2 area is the voltage output circuit, which provides 12V, 3A voltage output for the contactor and solenoid valve of the arc wire feeder.

[0013] As another improvement in this application, U2 in the PCB CIRCLE3 area uses a DC / DC converter chip with an operating frequency of 570KHz. The +12V input voltage is input through pin 2 of U2 and output through pin 8 of U2 via inductor L3 and D3 to output a +7V voltage. R44, R41 and R42 are voltage feedback circuits, providing 7V to U6 and outputting a 5V voltage. Therefore, the power consumption is very low and no heat sink is needed for heat dissipation. Another path is through C1, D2 and C40 to generate a -12V regulated voltage. The PCB CIRCLE3 area is the control voltage output part of the arc wire feeder, ensuring the stable operation of the sensor circuit.

[0014] As a further improvement to this application, U6 in the PCB CIRCLE4 area uses a DC / DC converter chip with an operating frequency of 150KHz. The input voltage is input through pin 1 of U6 and output as +5V through inductor L2 from pin 2 of U6. The maximum output current can reach 3A. The PCB CIRCLE4 area can provide a high-precision 5V voltage for the CPU and display on the control board.

[0015] In summary, in this application, when the input voltage is 11-110V, the voltage rectified by VD1-VD4 is provided to U1 by R6 with current limiting. At the same time, voltage is provided to U1 through R46, Q2, CR10 and CR2. When the voltage required for startup is met, U1 starts up and outputs a drive voltage. The voltage output from windings 5 ​​and 6 through D11 is used by U1. U4 continuously detects the magnitude of the voltage output from windings 7 and 8 through D4. After passing through R3, R4, R1 and R2, U3 compares and controls the magnitude of the output voltage, thereby controlling the voltage output of the entire circuit and increasing the power supply voltage range of the arc voltage induction wire feeder to adapt to the voltage requirements of new welding processes. Attached Figure Description

[0016] Figure 1 The circuit diagram of an 11V-110V switching power supply suitable for an arc voltage induction wire feeder according to the first embodiment of this application is shown.

[0017] Figure 2 for Figure 1 Schematic diagram of the structure at point A;

[0018] Figure 3 This is a partial circuit diagram of the PCB CIRCLE1 region in the first embodiment of this application;

[0019] Figure 4 This is a partial circuit diagram of the PCB CIRCLE2 region in the first embodiment of this application;

[0020] Figure 5This is a partial circuit diagram of the PCB CIRCLE3 region in the first embodiment of this application;

[0021] Figure 6 This is a partial circuit diagram of the PCB CIRCLE4 area in the first embodiment of this application.

[0022] Explanation of the labels in the diagram:

[0023] 1. PCB CIRCLE1 area, 2. PCB CIRCLE2 area, 3. PCB CIRCLE3 area, 4. PCB CIRCLE4 area. Detailed Implementation

[0024] First implementation method:

[0025] Figure 1-6 This invention illustrates an 11V-110V switching power supply suitable for an arc voltage induction wire feeder, comprising a power supply circuit. The power supply circuit includes PCB CIRCLE1 region 1, PCB CIRCLE2 region 2, PCB CIRCLE3 region 3, and PCB CIRCLE4 region 4. The power supply circuit, except for PCB CIRCLE1 region 1, PCB CIRCLE2 region 2, PCB CIRCLE3 region 3, and PCB CIRCLE4 region 4, is divided into PCB CIRCLE5 region. PCB CIRCLE5 region includes a T1 switching power supply transformer, 1 and 3 primary windings, 5 and 6 feedback windings, 7 and 8 output windings, which also serve as feedback voltage windings.

[0026] PCB CIRCLE5 is electrically connected to PCB CIRCLE1 and PCB CIRCLE2 respectively, PCB CIRCLE2 is electrically connected to PCB CIRCLE3, and PCB CIRCLE3 is electrically connected to PCB CIRCLE4.

[0027] Within the PCB CIRCLE5 area, PCBCIRCLE5 is the switching inverter circuit, 3V2 IRF260 is the power switch transistor, VD1~VD4 are the input rectifier transistors, C5 is the input filter capacitor, R6 is the sensing input, and the input voltage is also provided to U1 through R46, Q2, CR10 and CR2 to ensure reliable startup of the switching power supply throughout the entire range.

[0028] 3V2 is the power switch transistor, R22 is the current limiting resistor to ensure that the switch transistor is not damaged by overcurrent, U1 and the surrounding circuit provide the drive pulse for the switch transistor, U4 and the surrounding circuit provide the feedback signal to ensure the stable operation of the circuit, and R16, C2 and D8 are peak absorption circuits to protect 3V2 from being broken down by high voltage.

[0029] The input voltage in area 1 of PCB CIRCLE1 is regulated to 10V after passing through R46, Q2, CR10 and CR2. This voltage powers the U1 circuit to start the switching power supply and serves as an auxiliary part of the switching power supply, providing the startup voltage for the switching power supply.

[0030] In section 2 of PCB CIRCLE2, D4 is a fast rectifier diode, which rectifies the AC to DC. C10 and C49 are output filter capacitors, which store energy. U5 uses a DC / DC converter chip with an operating frequency of 150KHz. The input voltage is input through pin 1 of U5 and output as +12V, 3A current through inductor L1 from pin 2 of U5. R36 and R37 are voltage feedback circuits. R2LED1 visually indicates whether the switching power supply is working. When working, the light is on. Section 2 of PCB CIRCLE2 is the voltage output circuit, which provides 12V, 3A voltage output for the contactor and solenoid valve of the arc wire feeder.

[0031] In section 3 of PCB CIRCLE3, U2 uses a DC / DC converter chip with an operating frequency of 570kHz. The +12V input voltage is input through pin 2 of U2 and output through pin 8 of U2 via inductor L3 and D3 to output a +7V voltage. R44, R41, and R42 form a voltage feedback circuit, providing 7V to U6 and outputting a 5V voltage. Therefore, the power consumption is very low and no heat sink is needed for heat dissipation. Another path is through C1, D2, and C40 to generate a -12V regulated voltage. Section 3 of PCB CIRCLE3 is the control voltage output section of the arc wire feeder, ensuring the stable operation of the sensor circuit.

[0032] U6 in PCB CIRCLE4 uses a DC / DC converter chip with an operating frequency of 150KHz. The input voltage is input through pin 1 of U6 and output as +5V through inductor L2 from pin 2 of U6. The maximum output current can reach 3A. PCB CIRCLE4 can provide a high-precision 5V voltage for the CPU and display on the control board.

[0033] When the input voltage is 11~110V, the voltage rectified by VD1~VD4 is provided to U1 by R6 with current limiting. At the same time, voltage is provided to U1 through R46, Q2, CR10 and CR2. When the voltage required for startup is met, U1 starts up and outputs the drive voltage. The voltage output from windings 5 ​​and 6 through D11 is used by U1. U4 continuously detects the magnitude of the voltage output from windings 7 and 8 through D4. After passing through R3, R4, R1 and R2, U3 compares and controls the magnitude of the output voltage, thereby controlling the voltage output of the entire circuit.

[0034] The expanded voltage range of the switching power supply in this application can be effectively applied to the following fields:

[0035] Mechanical manufacturing: In the manufacturing process of various mechanical equipment, such as machine tools, cranes, and pressure vessels, arc wire feeders can ensure welding quality and extend the service life of equipment.

[0036] Construction industry: Used for welding construction of steel structures, bridges, etc., it can adapt to welding requirements under different environments and working conditions and ensure project quality.

[0037] Aerospace: In the aerospace field, the requirements for welding quality are extremely high. Arc wire feeders can precisely control the wire feeding speed and arc length to ensure the quality and reliability of welded joints.

[0038] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. An 11V-110V switching power supply suitable for an arc voltage induction wire feeder, comprising a power supply circuit, characterized in that: The power supply circuit includes PCB CIRCLE1 area (1), PCB CIRCLE2 area (2), PCB CIRCLE3 area (3) and PCB CIRCLE4 area (4). The power supply circuit except for PCB CIRCLE1 area (1), PCB CIRCLE2 area (2), PCB CIRCLE3 area (3) and PCB CIRCLE4 area (4) is part of PCB CIRCLE5 area. The PCB CIRCLE5 area includes T1 switching power supply transformer, 1 and 3 primary windings, 5 and 6 feedback windings, 7 and 8 output windings, and feedback voltage windings. The PCB CIRCLE5 region is electrically connected to the PCB CIRCLE1 region (1) and the PCB CIRCLE2 region (2) respectively. The PCB CIRCLE2 region (2) is electrically connected to the PCB CIRCLE3 region (3). The PCB CIRCLE3 region (3) is electrically connected to the PCB CIRCLE4 region (4).

2. The 11V-110V switching power supply suitable for an arc voltage induction wire feeder according to claim 1, characterized in that: Within the PCB CIRCLE5 area, PCB CIRCLE5 is a switching inverter circuit, 3V2 IRF260 is a power switch transistor, VD1~VD4 are input rectifier transistors, C5 is an input filter capacitor, R6 is a detection input, and the input voltage is also supplied to U1 through R46, Q2, CR10 and CR2; 3V2 is the power switch transistor, R22 is the current limiting resistor, U1 and its surrounding circuits provide the drive pulse for the switch transistor, U4 and its surrounding circuits provide the feedback signal, and R16, C2 and D8 are the spike absorption circuits.

3. The 11V-110V switching power supply suitable for an arc voltage induction wire feeder according to claim 1, characterized in that: The input voltage in the PCB CIRCLE1 area (1) is regulated to 10V after passing through R46, Q2, CR10 and CR2, which powers the U1 circuit to start the switching power supply and serves as an auxiliary part of the switching power supply.

4. The 11V-110V switching power supply suitable for an arc voltage induction wire feeder according to claim 1, characterized in that: In the PCB CIRCLE2 area (2), D4 is a fast rectifier diode, C10 and C49 are output filter capacitors, U5 uses a DC / DC converter chip with a working frequency of 150KHz. The input voltage is input through pin 1 of U5 and output through pin 2 of U5 via inductor L1 with a current of +12V and 3A. R36 and R37 are voltage feedback circuits. The PCB CIRCLE2 area (2) is a voltage output circuit that provides a voltage output of 12V and 3A.

5. The 11V-110V switching power supply suitable for an arc voltage induction wire feeder according to claim 1, characterized in that: In the PCB CIRCLE3 area (3), U2 uses a DC / DC CONVERTER chip with a working frequency of 570KHz. The +12V input voltage is input through pin 2 of U2 and output through pin 8 of U2 via inductor L3 and D3 to output +7V voltage. R44, R41 and R42 are voltage feedback circuits. 7V is provided to U6 to output 5V voltage. Another path is through C1, D2 and C40 to generate a -12V regulated voltage. The PCB CIRCLE3 area (3) is the control voltage output part of the arc wire feeder.

6. The 11V-110V switching power supply suitable for an arc voltage induction wire feeder according to claim 1, characterized in that: U6 in the PCB CIRCLE4 area (4) uses a DC / DC CONVERTER chip with a working frequency of 150KHz. The input voltage is input through pin 1 of U6 and outputs +5V through inductor L2 from pin 2 of U6. The maximum output current can reach 3A. The PCB CIRCLE4 area (4) can provide a high-precision 5V voltage.

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