Electric welding machine power supply control circuit and AC / DC dual-purpose energy-saving electric welding machine

Abstract

The welding machine power supply control circuit and AC / DC dual-purpose energy-saving welding machine provided by the present invention solve the problem that the output power of the existing motor transformer is constant and cannot be adjusted according to the actual needs of the output power. The welding machine power supply control circuit in the present invention includes: a power supply transformer, a remote control receiver and a welding current controller. The remote control receiver is respectively connected to the multi-resistance welding circuit through a relay group, the multi-resistance welding circuit is connected to the input end of the welding current controller, and the output end of the welding current controller is connected to the adjustment end of the power supply transformer to adjust the output current of the welding machine. It has the function of step pulse value adjustment and stepless current size adjustment of remote control current adjustment without connection. It is efficient in load saving and energy saving; gas shielded welding and gas lance can be used; it has comprehensive external machine control function and data recording function.

Description

Technical Field

[0001] The invention relates to the technical field of electric welding machines and controls, in particular to an electric welding machine power supply control circuit and an AC / DC dual-purpose energy-saving electric welding machine. Background Art

[0002] During the use of existing electric welding machines, the output current is mostly adjusted manually. During the adjustment process, due to the use characteristics of the electric welding machine itself, there is a no-load operation situation, which causes a large waste of electric energy. To address the above problems, the existing technology mostly uses different models of electric welding machines for adjustment. However, this method will cause problems such as increased processing costs and increased project operation difficulty during implementation. Summary of the invention

[0003] The purpose of the present invention is to provide an electric welding machine, which solves the problem that the energy consumption of the existing electric welding machine is large and cannot be reasonably utilized during the power supply and use process.

[0004] The present invention provides a power supply control circuit for an electric welder, comprising: a power supply transformer, a remote control receiver and a welding current controller; the remote control receiver is respectively connected to a multi-resistance welding circuit through a relay group, the multi-resistance welding circuit is connected to an input end of the welding current controller, and an output end of the welding current controller is connected to an adjustment end of the power supply transformer to adjust the output current of the electric welder.

[0005] In a preferred embodiment of the present invention, the power supply transformer includes: a main transformer, a mutual inductance transformer and a control winding; the primary of the main transformer is the input stage, the primary coil of the mutual inductance transformer is connected in series with the primary coil of the main transformer, the secondary coil of the main transformer is connected in series with the secondary of the mutual inductance transformer in the same direction as the primary coil, and the secondary of the mutual inductance transformer is the output side; the two ends of the control winding are adjustment ends, and the secondary induced output current value of the mutual inductance transformer is adjusted according to the output current of the adjustment end.

[0006] In a preferred implementation manner of the present invention, the secondary coil of the mutual inductance transformer comprises a first secondary coil and a second secondary coil, and the first secondary coil is connected in series with the second secondary coil.

[0007] In a preferred embodiment of the present invention, it further comprises: a signal separator; the output end of the remote control receiver is connected to the output end of the signal separator; the output end of the signal separator is connected to the relay group.

[0008] In a preferred embodiment of the present invention, it also includes: a stepless voltage regulator; the output end of the stepless voltage regulator is connected to the output end of the welding current controller, and the output end is connected to the input end of the relay group; when the welding current controller receives the input information of the stepless voltage regulator, it drives the stepless voltage regulator to control and drive the relay group.

[0009] In a preferred embodiment of the present invention, it further comprises a data recording controller; the input end of the data recording controller is connected to the output end of the welding current controller to record the driving current value of the welding current controller.

[0010] The present invention also provides an AC / DC dual-purpose energy-saving electric welding machine, including an AC / DC electric welding machine with the above-mentioned electric welding machine power supply control circuit.

[0011] In a preferred embodiment of the present invention, it further comprises: a control panel, on which adjustment buttons are arranged; and the adjustment buttons are connected to the input end of the remote control receiver.

[0012] In a preferred embodiment of the present invention, it also includes: a remote control terminal and a communication device; the remote control terminal is connected to the input end of the remote control receiver through the communication device, and the remote control terminal sends a control instruction to the remote control receiver to remotely control the welding machine.

[0013] In a preferred implementation manner of the present invention, the remote control terminal is a wireless remote control terminal or a wired remote control terminal; and the communication device is a wireless communication device or a wired communication device.

[0014] From the above content, it can be seen that the beneficial effects of the present invention are: it has the function of remote current regulation without connection, and can realize step pulse value regulation and stepless current regulation. It can be used for gas shielded welding and gouging while being efficient and energy-saving, and has comprehensive external machine control function and data recording function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 The present invention is a circuit diagram of an electric welding machine in one embodiment.

[0017] Reference numerals:

[0018] J1 is the positive phase signal switching relay, J2 is the negative phase signal switching relay, J3 is the step and stepless switching control line relay, J4 is the switching control current distribution line relay, J5 is the overload safety control line relay, R1 is the high pulse value current adjustment, R2 is the low pulse value current adjustment, R3 is the working current setting, B1 is the main transformer, B2 is the mutual inductance transformer, 40 is the rectifier circuit, 30 is the contactless contactor, 50 is the welding current controller, 60 is the stepless voltage regulator, 70 is the signal separator, and 80 is the remote control receiver. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention provides a power supply control circuit for an electric welding machine, such as Figure 1 As shown, it includes: a power supply transformer, a remote control receiver 80 and a welding current controller 50. The remote control receiver 80 is connected to the multi-resistance welding circuit through a relay group, the multi-resistance welding circuit is connected to the input end of the welding current controller 50, and the output end of the welding current controller 50 is connected to the regulating end of the power supply transformer to regulate the output current of the electric welder.

[0021] In a preferred embodiment of the present invention, the power supply transformer includes: a main transformer B1, a mutual inductance transformer B2 and a control winding. The primary of the main transformer B1 is the input stage, the primary coil of the mutual inductance transformer B2 is connected in series with the primary coil of the main transformer B1, the secondary coil of the main transformer B1 is connected in series with the secondary coil of the mutual inductance transformer B2 in the same direction as the primary coil, the secondary of the mutual inductance transformer B2 is the output side, and the two ends of the control winding are the regulating ends, and the secondary induced output current value of the mutual inductance transformer B2 is adjusted according to the output current of the regulating end.

[0022] In a preferred embodiment of the present invention, the secondary coil of the mutual inductance transformer B2 includes a first secondary coil and a second secondary coil, and the first secondary coil and the second secondary coil are connected in series.

[0023] In a preferred embodiment of the present invention, it further comprises: a signal separator 70; an output end of a remote control receiver 80 is connected to an output end of the signal separator 70, and an output end of the signal separator 70 is connected to a relay group.

[0024] In a preferred embodiment of the present invention, the stepless voltage regulator 60 is further included, wherein the output end of the stepless voltage regulator 60 is connected to the output end of the welding current controller 50, and the output end is connected to the input end of the relay group. When the welding current controller 50 receives the input information of the stepless voltage regulator 60, the stepless voltage regulator 60 is driven to control and drive the relay group.

[0025] In a preferred embodiment of the present invention, it further comprises a data recording controller, wherein the input end of the data recording controller is connected to the output end of the welding current controller 50 to record the driving current value of the welding current controller 50 .

[0026] In a preferred embodiment of the present invention, it further comprises: a control panel, on which adjustment buttons are arranged, and the adjustment buttons are connected to the input end of the remote control receiver 80 .

[0027] Here’s how it works:

[0028] 1. Connect the power cord and the power indicator light will turn on.

[0029] 2. Start the welding machine power switch to control the power supply. The working indicator light, load cut-off indicator light, and default step adjustment current indicator light will light up.

[0030] 1. The working indicator light is on, the working line conditions are met, and the machine enters the standby state.

[0031] 2. The load cut indicator light is on and the main transformer is in the load cut state.

[0032] 3. The step adjustment indicator light is on, and the default step manual adjustment and step remote control adjustment functions are started. The step adjustment is to adjust the large current difference of R1 and the small current difference of R2 in advance, and the difference is R3.

[0033] R1 is adjusted by the positive pulse knob, and R2 is adjusted by the negative pulse knob. Using R1 with a large current or R2 with a small current, it can work for any length of time (can be used for a long time, can be inched, or can be not used). The default output current is the set value of R3 (adjusted and set by the "working current" adjustment knob on the operation panel).

[0034] 3. Working links of welding machine circuit:

[0035] When the arc is started, the high-efficiency load-cutting circuit starts, controls the contactless contactor 30 to supply power to the B1 main transformer, and the main transformer output enters the active magnetic field amplifier B2. The specified current is adjusted by the R3 working current adjustment potentiometer, driving the welding current controller 50 to make a control pulse value of the corresponding size, and then enters the active magnetic field amplifier B2 control coil through the rectifier circuit 40, controls the corresponding mutual inductance of the active magnetic field amplifier B2, and outputs to connect the welding handle for welding. (The R1 large current value is manually set and adjusted in advance, and the R2 small current value is manually set and adjusted in advance.)

[0036] 1. During the welding process, small current control is required temporarily or for a long time:

[0037] When the remote control switch is pointed downward, the remote control receiver 80 responds to the signal and drives the signal separator 70. The signal separator 70 outputs the control power signal, which is switched through the 4th pin and the 12th pin of the positive phase signal switching relay J1 to control the negative phase signal switching relay J2. The 9th pin and the 5th pin of the negative phase signal switching relay J2 are closed, and the adjustment signal of R2 is output through the 1st pin and the 3rd pin of the step and stepless switching control circuit relay J3 to drive the welding current controller 50, and then enters the active magnetic field amplifier B2 coil through the rectifier circuit 40 to control the active magnetic field amplifier B2 to obtain the corresponding small current required for welding.

[0038] 2. During the welding process, high current control is required temporarily or for a long time:

[0039] When the remote control switch is pointed upward, the remote control receiver 80 responds to the signal and drives the signal separator 70. The signal separator 70 outputs the control power signal, and switches the relay J2 through the 4th pin and the 12th pin through the negative phase signal, starts the positive phase signal switching relay J1, and the 9th pin and the 5th pin of the positive phase signal switching relay J1 are closed. Through the step and stepless switching control line relay J3's 1st pin and 2nd pin, the R1 potentiometer signal is adjusted to drive the welding current controller 50, and then enters the active magnetic field amplifier B2 coil through the rectifier circuit 40. B2 makes a corresponding mutual inductance, and controls B2 to obtain the corresponding large current required for welding.

[0040] Regardless of whether the remote control switch is pointing to increase or decrease the current, as long as the switch is released, it will automatically return to the default working current value. The operation can be repeated at will.

[0041] 4. Stepless remote control current regulation:

[0042] 1. Press the function switch, the step and stepless switching control circuit relay J3 and the switching control current distribution circuit relay J4 work at the same time. The step and stepless switching control circuit relay J3 closes the 5th and 9th pins, the 6th and 10th pins, and the 7th and 11th pins, and connects the separated remote control signal to the stepless voltage regulator 60; disconnects the 1st pin to cut off the manual adjustment function, and disconnects the 2nd, 3rd, and 4th pins to cut off the step adjustment function (the 2nd pin is the step large current adjustment function, the 3rd pin is the step small current adjustment function, and the 4th pin is the default working current setting). The switching control current distribution circuit relay J4 disconnects the 4th and 12th pins, the step adjustment light goes out, and the stepless adjustment light lights up; the 5th and 9th pins are closed, and the output signal of the stepless voltage regulator 60 directly enters the rectifier filter 40 and then connects to B2. At this time, the stepless adjustment indicator light is on, and the step adjustment indicator light is off. It means that the stepless adjustment is in place and is in standby mode.

[0043] 2. Adjust welding current during welding:

[0044] A: Move the handle adjustment switch downward or the delay current decreases, the remote control receiver responds accordingly and sends the signal to the signal separator 70. The signal separator 70 outputs the control power signal, which enters the 4th pin of J1 and connects to the 12th pin, starts the negative phase signal switching relay J2, and the D2 indicator light lights up accordingly; the 9th pin of the negative phase signal switching relay J2 is connected to the 5th pin, enters the 1st and 3rd pins of the ladder and stepless switching control circuit relay J3, and then enters the stepless voltage regulator 60. The stepless voltage regulator 60 makes a corresponding control signal output, passes through the 5th pin of J4 and connects to the 9th pin, and enters the control coil of the active magnetic field amplifier B2 through the rectifier circuit 40. The active magnetic field amplifier B2 makes a corresponding mutual inductance and outputs a corresponding welding current.

[0045] B: Move the handle adjustment switch upward or increase the delay current, the remote control receiver responds accordingly and sends the signal to the signal separator 70. The signal separator 70 outputs the control power signal, which enters the 4th pin of J2 and is connected to the 12th pin, starts the positive phase signal switching relay J1, and the D1 indicator light lights up accordingly; the 9th pin of the positive phase signal switching relay J1 is connected to the 5th pin, enters the 1st and 2nd pins of the ladder and stepless switching control circuit relay J3, and then enters the stepless voltage regulator 60. The stepless voltage regulator 60 makes a corresponding control signal output, passes through the 5th pin of J4 and is connected to the 9th pin, and enters the control coil of the active magnetic field amplifier B2 through the rectifier circuit 40. The active magnetic field amplifier B2 makes a corresponding mutual inductance and outputs a corresponding welding current (regardless of whether the handle switch is used to increase the current upward or decrease the current downward, or is delayed or moved in an instant, the adjusted current value is automatically locked after the handle is released).

[0046] When the remote control switch adjusts the large current upward and exceeds the maximum current value, the D2 voltage regulator breaks down and feeds back the overload signal to the overload safety control circuit relay J5. The overload safety control circuit relay J5 contacts close, and the signal separator 70 increases the signal loop and locks the maximum value, thereby protecting the welding machine from overload.

[0047] 5. External control terminals:

[0048] 1. Work with the argon arc welding controller.

[0049] 2. With automatic arc starting and power-off function terminals.

[0050] 6. External data terminal:

[0051] 1. Connect the welding machine comprehensive working data recorder.

[0052] 2. When the data terminal is connected, all operations on the welding machine panel will stop automatically, and the indicator lights will continue to work as usual along with the external equipment.

[0053] 3. Adjust the control drive parameters and have the function of external control display and recording.

[0054] At the same time, the present invention also provides an AC / DC dual-purpose energy-saving electric welding machine, including the above-mentioned electric welding machine power supply control circuit. In a preferred embodiment of the present invention, in order to facilitate the control of the electric welding machine, it also includes: a control panel, on which adjustment buttons are arranged; and the adjustment buttons are connected to the input end of the remote control receiver 80.

[0055] At the same time, in order to realize the control of the automated assembly line or remote control, in one aspect of the present invention, it also includes: a wireless or wired remote control terminal and a wireless or wired communication device; the wireless or wired remote control terminal is connected to the input end of the remote control receiver through the wireless or wired communication device. The wireless or wired remote control terminal can load a control program with a control interface through control software such as APP. A plurality of control buttons are set on the control interface to realize remote control of the welding machine.

[0056] It can be seen that the present invention has two control modes. One is the on-site control mode realized by the electric welding machine panel during on-site welding. At the same time, the control interface program such as APP can be loaded on the wireless or wired remote control terminal to realize the welding machine output power control during assembly line welding.

[0057] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. Electric welding machine power supply control circuit, characterized in that: include: A power supply transformer, a remote control receiver and a welding current controller; the remote control receiver is respectively connected to the multi-resistance welding circuit through a relay group, the multi-resistance welding circuit is connected to the input end of the welding current controller, and the output end of the welding current controller is connected to the regulating end of the power supply transformer to regulate the output current of the electric welder; The power supply transformer comprises: a main transformer, a mutual inductance transformer and a control winding; the primary of the main transformer is the input stage, the primary coil of the mutual inductance transformer is connected in series with the primary coil of the main transformer, the secondary coil of the main transformer is connected in series with the secondary coil of the mutual inductance transformer in the same direction as the primary coil, and the secondary of the mutual inductance transformer is the output side; the two ends of the control winding are the regulating ends, and the secondary induced output current value of the mutual inductance transformer is adjusted according to the output current of the regulating end; It also includes: a control panel, on which adjustment buttons are arranged; the adjustment buttons are connected to the input end of the remote control receiver; It also includes: a remote control terminal and a communication device; the remote control terminal is connected to the input end of the remote control receiver through the communication device, and the remote control terminal sends a control instruction to the remote control receiver to remotely control the welding machine; The remote control terminal is a wireless remote control terminal or a wired remote control terminal; the communication device is a wireless communication device or a wired communication device.

2. The welding machine power supply control circuit according to claim 1, characterized in that: The secondary coil of the mutual inductance transformer comprises a first secondary coil and a second secondary coil, and the first secondary coil is connected in series with the second secondary coil.

3. The welding machine power supply control circuit according to claim 1 or 2, characterized in that: Also includes: signal separator; the output end of the remote control receiver is connected to the output end of the signal separator; the output end of the signal separator is connected to the relay group.

4. The welding machine power supply control circuit according to claim 1, characterized in that: Also includes: A stepless voltage regulator; the output end of the stepless voltage regulator is connected to the output end of the welding current controller, and the output end is connected to the input end of the relay group; When the welding current controller receives the input information from the stepless voltage regulator, it drives the stepless voltage regulator to control and drive the relay group.

5. The welding machine power supply control circuit according to claim 1, characterized in that: It also includes a data recording controller; the input end of the data recording controller is connected to the output end of the welding current controller to record the driving current value of the welding current controller.

6. AC / DC dual-purpose energy-saving welding machine, characterized in that: An AC / DC electric welding machine comprising the electric welding machine power supply control circuit as claimed in claim 1.

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