CN210413018U - Welding control system of energy storage welding machine - Google Patents
Welding control system of energy storage welding machine Download PDFInfo
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- CN210413018U CN210413018U CN201921402395.2U CN201921402395U CN210413018U CN 210413018 U CN210413018 U CN 210413018U CN 201921402395 U CN201921402395 U CN 201921402395U CN 210413018 U CN210413018 U CN 210413018U
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Abstract
The utility model discloses a welding control system of an energy storage welding machine, which comprises a central processing module; the insulated gate bipolar transistor IGBT determines whether the electric energy stored in the energy storage welding machine is released instantaneously or not according to the driving control of the discharge control module; the discharge control module is used for driving the IGBT to be switched off or switched on; the charging control module is used for controlling charging and energy storage of the energy storage welding machine; the charging control module and the discharging control module are both connected with the central processing module, the discharging control module is connected with the insulated gate bipolar transistor IGBT, and the charging control module is controlled through the central processing module according to a signal indicating whether the insulated gate bipolar transistor IGBT is turned off or not. The structure utilizes the characteristic that the insulated gate bipolar transistor IGBT can be turned off or turned on at any time to realize the effect of charging the energy storage module in the energy storage welding machine at any time, and further improves the working efficiency of the energy storage welding machine in welding operation.
Description
Technical Field
The utility model belongs to the technical field of energy storage welding machine technique and specifically relates to a welding control system of energy storage welding machine.
Background
The energy storage resistance welder is a welding process which utilizes the resistance of current passing through a workpiece and a welding contact surface to generate heat and applies pressure to a welding position to weld, has the characteristics of high production efficiency, low cost, material saving, easy automation and the like, and is widely applied to industries of aviation, aerospace, energy, electronics, automobiles, light industry and the like.
At present, the traditional medium-voltage energy storage resistance welding stores energy through a capacitor, a Silicon Controlled Rectifier (SCR) discharges, and the Silicon Controlled Rectifier (SCR) has the characteristic that once the Silicon Controlled Rectifier (SCR) is switched on, the Silicon Controlled Rectifier (SCR) can not be switched off, the Silicon Controlled Rectifier (SCR) can be switched off after the capacitor voltage is completely discharged every time, the Silicon Controlled Rectifier (SCR) is charged without discharging the electric energy, so that a charging loop is easy to cause short circuit, the electric energy can not be charged continuously, an energy storage welding machine generally needs to perform a charging operation on an energy storage module after one-time welding operation is completed, if the electric energy in the energy storage module is not discharged after one-time welding operation is completed, the electric energy in a touch module can be charged after one-time discharging is completed, the time consumed by the mode is longer.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the not enough and one kind that designs of above-mentioned technique can carry out the welding control system of the energy storage welding machine that charges the energy storage to the energy storage module in the energy storage welding machine at any time.
The utility model relates to a central processing module;
the insulated gate bipolar transistor IGBT determines whether the electric energy stored in the energy storage welding machine is released instantaneously or not according to the driving control of the discharge control module;
the discharge control module is used for driving the IGBT to be switched off or switched on;
the charging control module is used for controlling whether the energy storage welding machine is charged or not;
the charging control module and the discharging control module are both connected with the central processing module, the discharging control module is connected with the insulated gate bipolar transistor IGBT, and the charging control module is controlled through the central processing module according to a signal indicating whether the insulated gate bipolar transistor IGBT is turned off or not.
Further preferably, the method further comprises:
the pressure detection module is used for detecting the pressure of a mechanism for compressing and positioning the welding workpiece in the energy storage welding machine for compressing and positioning the welding workpiece;
the displacement detection module is used for detecting the displacement of automatic displacement of a mechanism for compressing and positioning the welding workpiece due to the deformation of the welding workpiece after welding;
the pressure detection module and the displacement detection module are connected with the central processing module, and data detected by the pressure detection module and the displacement detection module are transmitted to the central processing module to be processed to form control instructions and data parameters.
Further preferably, the method further comprises:
the voltage detection module is used for detecting the voltage in the electric energy stored by the energy storage welding machine;
the current detection module is used for detecting the current output by the energy storage welding machine after the energy storage welding machine releases electric energy;
the current detection module and the voltage detection module are respectively connected with the central processing module, a control instruction is formed after operation processing in the central processing module according to data detected by the voltage detection module and the current detection module, and the central processing module inputs the control instruction into the discharge control module or the charge control module to drive the discharge control module or the charge control module to work so as to release and control electric energy stored in the energy storage welding machine or charge and energy storage control of the energy storage welding machine.
Preferably, the energy storage welding machine comprises a three-phase power supply, a step-up transformer, a three-phase rectification module, an energy storage module and a welding transformer, wherein the three-phase power supply is connected to the input end of the step-up transformer, and the three-phase rectification module, the energy storage module and the welding transformer are connected in parallel; the emitter of the insulated gate bipolar transistor is connected with the energy storage module, the collector of the insulated gate bipolar transistor is connected with the welding transformer, and the gate of the insulated gate bipolar transistor is connected with the discharge control module; the output end of the welding transformer is provided with a pressure sensor and a displacement sensor, a pressure detection module is connected with the pressure sensor, a displacement detection module is connected with the displacement sensor, a current sensor is arranged on the current output end of the welding transformer, and a current detection module is connected with the current sensor; the charging control module is connected with the three-phase rectifying module, and the voltage detection module is connected with the energy storage module.
Further preferably, the voltage detection module includes a charging voltage HV, a voltage dividing circuit, a resistor R59, an operational amplifier U18A, an operational amplifier U18B, an optical coupler U24 and an operational amplifier U49A, the charging voltage HV is input from the energy storage module, is output to the voltage dividing circuit, is input to the operational amplifier U18A and the operational amplifier U18B through the resistor R59 for operational amplifier processing, an electrical signal after the operational amplifier processing is input to the optical coupler U24 for isolation output to the operational amplifier U49A for restoring the sampling voltage, and a signal of the restored sampling voltage is input to the central processing module.
Further preferably, the current detection module includes an output current Signal _ MU, an integrating circuit U71A, a fine filter shaping circuit U71B, and a fine filter shaping circuit U71C; the output current Signal _ MU is input by the current sensor and output to the integrating circuit U71A to restore the sampling current, and the restored sampling current is filtered and shaped by the precise filter shaping circuit U71B and the precise filter shaping circuit U71C and then output to the central processing module.
Further preferably, the pressure detection module comprises an output current Signal _ YL and an operational amplifier U49D; the output current Signal _ YL is input by the pressure sensor and output to the operational amplifier U49D, and the output end of the operational amplifier U49D is connected with the central processing module.
Further preferably, the displacement detection circuit includes an output current Signal _ WY and an operational amplifier U49C; the output current Signal _ WY is input by the displacement sensor and output to the operational amplifier U49C, and the output end of the operational amplifier U49C is connected with the central processing module.
Further preferably, the charging control module comprises a charging pulse PWM MAC, an optocoupler U43 and a pulse transformer T3, the charging pulse PWM MAC is input from the central processing module and output to the optocoupler U43, the optocoupler U43 is connected to the pulse transformer T3, and the output terminal of the pulse transformer T3 is connected to the three-phase rectification module.
Further preferably, the discharge control module comprises a discharge pulse PWMA, an optocoupler U50, a transistor Q8, a transistor Q15, and a transistor Q16; the discharging pulse PWMA is input by a central processing module and output to an optical coupler U50, the optical coupler U50 is connected with a triode Q8, the triode Q8 is respectively connected with a triode Q15 and a triode Q16, and emitting electrodes of the triode Q15 and the triode Q16 are both connected with a gate electrode of an insulated gate bipolar transistor IGBT.
Further preferably, each module in the control system carries out the power supply system of supplying power, carries out the protection module that charges to the energy storage module, and power supply system includes PCB power, anti-interference module and 24V switching power supply, and PCB power, anti-interference module and 24V switching power supply are established ties each other, and the PCB power supplies power to each module of control system.
The utility model discloses a welding control system of energy storage welding machine utilizes the characteristic that insulated gate bipolar transistor IGBT can turn-off at any time or switch on to realize carrying out the effect of charging at any time to the energy storage module in the energy storage welding machine, has solved and has waited to carry out the operation of charging again after the electric energy in the energy storage module has released among the current energy storage welding, and this mode expends time, influences welding efficiency's technical problem, further promotes the work efficiency that the energy storage welding machine carries out welding operation.
Drawings
FIG. 1 is a schematic diagram of the overall system structure of embodiment 1;
fig. 2 is a schematic circuit diagram of a charging control module according to embodiment 1;
fig. 3 is a schematic circuit diagram of a discharge control module according to embodiment 1;
FIG. 4 is a schematic circuit diagram of a pressure detection module according to embodiment 1;
FIG. 5 is a schematic circuit diagram of a displacement detecting module according to embodiment 1;
FIG. 6 is a schematic circuit diagram of a voltage detection module according to embodiment 1;
fig. 7 is a schematic circuit configuration diagram of a current detection module of embodiment 1;
FIG. 8 is a schematic circuit diagram of the interference rejection module according to embodiment 1;
fig. 9 is a schematic circuit diagram of a charge protection module according to embodiment 1;
FIG. 10 is a schematic structural view of a central processing module according to embodiment 1;
fig. 11 is a flowchart of the operation of the entire system of embodiment 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1-10, the welding control system of the energy storage welding machine described in this embodiment includes a central processing module 14, an insulated gate bipolar transistor IGBT, a discharging control module 3, and a charging control module 1; the charging control module 1 and the discharging control module 3 are both connected with the central processing module 14, the discharging control module 3 is connected with an insulated gate bipolar transistor IGBT, and whether the electric energy stored in the energy storage welding machine is released instantly or not is determined by the insulated gate bipolar transistor IGBT according to the driving control of the discharging control module.
The discharge control module is used for controlling the IGBT to be turned off or turned on according to the control instruction sent by the central processing module so as to determine whether the electric energy stored in the energy storage welding machine is instantaneously discharged or not; the charging control module is used for controlling whether the energy storage welding machine is charged or not.
The information of whether the insulated gate bipolar transistor IGBT is turned off is transmitted to the central processing module, the central processing module forms a control instruction according to the information, and the central processing module transmits the control instruction to the charging control module so as to control and determine whether to charge and store energy for the energy storage welding machine through the charging control module. The central processing module adopts a CPU processor, the system can be matched with an upper computer for use, and the upper computer can be a PC computer.
In this embodiment, the welding control system of the energy storage welding machine further includes a pressure detection module 6 and a displacement detection module 5; the pressure detection module and the displacement detection module are both connected with the central processing module 14.
In the above, the pressure detection module detects the pressure of a mechanism for compressing and positioning the welding workpiece in the energy storage welding machine to compress and position the welding workpiece; the displacement detection module is used for detecting the displacement of automatic displacement of a mechanism for compressing and positioning the welding workpiece due to the deformation of the welding workpiece after welding; and the data detected by the pressure detection module and the displacement detection module are transmitted to the central processing module for operation processing to form a control command and data parameters. The mechanism for compressing and positioning the welding workpiece generally adopts an air cylinder to compress and position in the energy storage welding machine, a piston rod of the air cylinder moves along with pressure change, the displacement is detected by a displacement detection module, and detected displacement data and pressure data are directly stored and displayed in an upper computer.
In this embodiment, the device further includes a voltage detection module 2 and a current detection module 4, and the voltage detection module and the current detection module are respectively connected to the central processing module.
In the above, the voltage detection module detects the voltage in the electric energy stored in the energy storage welding machine to obtain the detected current data, the current detection module detects the current output by the energy storage welding machine after releasing the electric energy to obtain the current data, the current data is transmitted to the central processing module for operation processing to form the control command, and the central processing module inputs the control command into the discharge control module or the charge control module to drive the discharge control module or the charge control module to operate, so as to release and control the electric energy stored in the energy storage welding machine or control the charge and energy storage of the energy storage welding machine.
In this embodiment, the energy storage welder is a medium-voltage capacitor energy storage welder, and specifically includes a three-phase power supply 13, a step-up transformer 12, a three-phase rectification module 11, an energy storage module, and a welding transformer 10, where the three-phase power supply is connected to an input end of the step-up transformer, and the three-phase rectification module, the energy storage module, and the welding transformer are connected in parallel; the emitter of the insulated gate bipolar transistor is connected with the energy storage module, the collector of the insulated gate bipolar transistor is connected with the welding transformer, and the gate of the insulated gate bipolar transistor is connected with the discharge control module; the output end of the welding transformer is provided with a pressure sensor 8 and a displacement sensor 9, a pressure detection module is connected with the pressure sensor, a displacement detection module is connected with the displacement sensor, a current sensor 7 is arranged on the current output end of the welding transformer, and a current detection module is connected with the current sensor; the charging control module is connected with the three-phase rectifying module, and the voltage detection module is connected with the energy storage module. The energy storage module 10 stores energy by using an energy storage capacitor; the power supply system of the energy storage welding machine is controlled by the insulated gate bipolar transistor to discharge, so that the discharging control is accurate and reliable, and the discharging can be switched off at any time to charge the energy storage module.
In this embodiment, the voltage detection module for detecting the voltage in the electric energy stored in the energy storage welding machine includes a charging voltage HV, a voltage dividing circuit (composed of a resistor R60, a resistor R61, a resistor R62, a resistor R63, and a resistor R64), a resistor R59, an operational amplifier U18A, an operational amplifier U18B, an optical coupler U24, and an operational amplifier U49A, wherein the charging voltage HV is input from the energy storage module, output to the voltage dividing circuit, input to the operational amplifier U18A and the operational amplifier U18B through the resistor R59 for operational amplification, the electrical signal after the operational amplification is input to the optical coupler U24 for isolation output to the operational amplifier U49A for sampling voltage reduction, the sampling voltage signal after the reduction is input to the central processing module, and finally, the signal is collected and processed by the central processing module and converted into data and/control commands which can be displayed and stored.
In this embodiment, the current detection module for detecting the current output by the energy storage welding machine after releasing the electric energy includes an output current Signal _ MU, an integrating circuit U71A, a precise filter shaping circuit U71B, and a precise filter shaping circuit U71C; the output current Signal _ MU is input by the current sensor and output to the integrating circuit U71A to restore the sampling current, the restored sampling current is filtered and shaped by the precise filtering and shaping circuit U71B and the precise filtering and shaping circuit U71C and then output to the central processing module, and finally the sampling current is acquired and processed by the central processing module and converted into data and/or control instructions which can be displayed and stored.
In this embodiment, the pressure detection module for detecting the pressure of the mechanism for pressing and positioning the welding workpiece in the energy storage welding machine for pressing and positioning the welding workpiece comprises an output current Signal _ YL and an operational amplifier U49D; the output current Signal _ YL is input by the pressure sensor and is output to an operational amplifier U49D, and the output end of the operational amplifier U49D is connected with the central processing module; and finally, the data are acquired and processed by the central processing module and are converted into data which can be displayed and stored.
In this embodiment, the displacement detection circuit for detecting the displacement amount by which the welded workpiece deforms after welding to cause automatic displacement of the mechanism for pressing and positioning the welded workpiece includes an output current Signal _ WY and an operational amplifier U49C; the output current Signal _ WY is input by the displacement sensor and is output to an operational amplifier U49C, and the output end of the operational amplifier U49C is connected with the central processing module; and finally, the data are acquired and processed by the central processing module and are converted into data which can be displayed and stored.
In this embodiment, the charging control module for controlling whether to charge and store energy for the energy storage welding machine includes a charging pulse PWM MAC, an optical coupler U43, and a pulse transformer T3, where the charging pulse PWM MAC is input by the central processing module and output to the optical coupler U43, the optical coupler U43 is connected to the pulse transformer T3, and the output end of the pulse transformer T3 is connected to the three-phase rectification module. The charging pulse is utilized to drive the primary side of a pulse transformer T3 through an optical coupling isolation control optical coupler U43, and the secondary output of the pulse transformer controls the main circuit to be conducted to charge.
In this embodiment, the discharging control module for driving the IGBT to turn off or on includes a discharging pulse PWMA, an optocoupler U50, a transistor Q8, a transistor Q15, and a transistor Q16; the discharging pulse PWMA is input by a central processing module and output to an optical coupler U50, the optical coupler U50 is connected with a triode Q8, the triode Q8 is respectively connected with a triode Q15 and a triode Q16, and emitting electrodes of the triode Q15 and the triode Q16 are both connected with a gate electrode of an insulated gate bipolar transistor IGBT. The high-frequency output of the discharge pulse is transmitted to a drive triode Q15 and a drive triode Q16 through an optocoupler isolation control triode Q8 to form a push-pull drive, the IGBT of the insulated gate bipolar transistor is controlled to conduct and discharge, and a DRA in the circuit is connected with the gate of the IGBT; when the discharging pulse PWMA is low frequency, the discharging pulse PWMA is input into the optical coupler U50 for processing, then the discharging pulse PWMA is output by the output electrode of the optical coupler U50 to be high frequency, the ICA end is low pulse frequency, the KBA is also low pulse frequency, the triode Q15 is driven, the triode Q16 forms push-pull output DRA which is also low pulse frequency, and the IGBT turning-off function is achieved.
In this embodiment, each module in the control system carries out the power supply system of supplying power, the protection module 18 that charges to the energy storage module, power supply system includes PCB power 17, anti-interference module 16 and 24V switching power 15, the PCB power, anti-interference module and 24V switching power establish ties each other, the PCB power respectively with central processing module 14, insulated gate bipolar transistor IGBT, discharge control module 3, charge control module 1, the current detection module, the voltage detection module, the power supply end of displacement detection module and pressure detection module links to each other and supplies power.
The control system circuit design of the embodiment: the device has the advantages that the device is protected by accurate delayed thermal shutdown and has an automatic recovery function, and manual resetting is not needed; the improved auto-restart function achieves < 3% maximum output power under short circuit and open loop fault conditions; zener can be selected to realize output overvoltage shutoff; optionally, a resistor may be used to set the undervoltage protection threshold.
An anti-interference module is adopted, see the circuit diagram of fig. 8, wherein the common mode inductor EMI1 plays a role in common mode filtering, and the capacitor C1 plays a role in differential mode interference absorption while filtering; therefore, the source electrode pin is an 'electrical' quiescent point, EMI electronic interference is reduced, high bandwidth provides quick no-overshoot start and excellent transient load response, creepage distance between the drain electrode and other pins is enlarged, and application reliability is improved
High-speed optical coupling isolation is adopted; for high frequency ac analog signals, providing 0.025% linearity from dc to several K frequencies, the isolation device first performs voltage-to-frequency conversion inside, isolates the resulting ac signal, and then performs frequency-to-voltage conversion to obtain the isolation effect.
A low offset high speed operational circuit is adopted; during design, a high-speed element is selected, closed-loop feedback is realized, and high-speed and stable signal output is achieved by combining the design of bypass and filtering.
The NANDFLASH + SRAM + FRAM flash memory is also built in; random access and off-chip storage are tightly combined, so that the access speed is higher and the efficiency is higher.
Referring to the circuit diagram of fig. 9, since the fet U15 is connected in series with the fet U16, the withstand voltage reaches 2kV, the PCB layout increases the pitch, and the isolation withstand voltage reaches 3kV, so that when the circuit diagram is connected to the central processing module, the energy storage module is enabled to achieve 1200V reliable charging and 3000V withstand voltage isolation.
Example 2:
as shown in fig. 11, this embodiment describes a work flow of a welding control system in an energy storage welding machine in embodiment 1, and the specific work flow is as follows:
s101, starting a system in a power-on mode;
s102, each module is in an initialization state;
s103, self-checking, namely, automatically checking whether a power supply and an air source of the energy storage welding machine are normal or not by utilizing a voltage detection module, a current detection module, a displacement detection module and a pressure detection module; if the fault information is normal, executing S104, otherwise, performing fault alarm according to the fault information;
s104, operating the system, and enabling a charging control module to enable a three-phase rectifying module of the energy storage welding machine to work to charge an energy storage capacitor;
s105, starting welding,
1) the voltage detection module detects the voltage of the energy storage capacitor in real time; when the voltage of the energy storage capacitor reaches a threshold value, executing S106; otherwise, returning to S104 and continuing to charge;
2) closing a three-phase rectification module of the energy storage welding machine, and starting a welding program;
3) an air cylinder of the energy storage welding machine descends to compress a workpiece, a discharge control module of the system enables an Insulated Gate Bipolar Transistor (IGBT) to be conducted, and an energy storage capacitor discharges;
specifically, the electric charge stored by the energy storage capacitor releases welding energy through the welding transformer, and instantaneous discharge is carried out on the welding point of the workpiece, so that the welding point of the workpiece is instantaneously melted at high temperature, and one-time welding is realized;
s106, detecting whether the data of the air cylinder pressure and the piston rod displacement of the air cylinder in the welding process are normal or not by the pressure detection module and the displacement detection module, if so, executing S108, otherwise, performing fault alarm according to fault information;
s107, storing, displaying and replaying the acquired data to a data list;
and S108, returning the cylinder, and starting next charging or ending the system.
The communication part for signal transmission of the control system adopts a high-speed serial port and a double communication module. And the deletion of program functions is facilitated by adopting a cascading design idea. And a differential communication mode is adopted, the operation is compiled according to the protocol of MODBUS _ RTU, the slave instrument is in a receiving state after being started, and the receiving and sending are completed in an interruption mode. When the received data meets the conditions, an interruption mode is adopted for data loopback, the communication operation is divided into data acquisition and information writing operation, and meanwhile, a calibration and inspection communication protocol in an extended production mode is added. A main function processing section: the method comprises AD, DI, DO and AI, wherein the AD processes signal values of all channels, and the DI part completes remote signaling and remote pulse functions; the DO part completes remote control and driving functions; the AI completes the telemetry function.
Finally, the technical solutions of the embodiment 1 and the embodiment 2 are combined to obtain: collecting welding parameters according to a data acquisition module, performing analog-to-digital conversion processing on the welding parameters, and transmitting digital signals in real time; with traditional SCR discharge pattern comparison, the utility model discloses can realize quick energy storage and accurate discharge's advantage, each process point quantization to resistance welding machine in welding process carries out data acquisition, comprehensive monitoring, so that the producer both can master in real time and analysis welding quality, can trace back historical data again, it has professional welding quality analysis and carries out the function of analysis to data, thereby can analyze welding process's quality, forecast the welding problem that probably produces, also can trace back the accident, work efficiency's technological effect has been improved.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (10)
1. A welding control system for an energy storage welder, comprising:
a central processing module;
the insulated gate bipolar transistor IGBT determines whether the electric energy stored in the energy storage welding machine is released instantaneously or not according to the driving control of the discharge control module;
the discharge control module is used for driving the IGBT to be switched off or switched on;
the charging control module is used for controlling whether the energy storage welding machine is charged or not;
the charging control module and the discharging control module are both connected with the central processing module, the discharging control module is connected with the insulated gate bipolar transistor IGBT, and the charging control module is controlled through the central processing module according to a signal indicating whether the insulated gate bipolar transistor IGBT is turned off or not.
2. The weld control system of the energy storage welder of claim 1, further comprising:
the pressure detection module is used for detecting the pressure of a mechanism for compressing and positioning the welding workpiece in the energy storage welding machine for compressing and positioning the welding workpiece;
the displacement detection module is used for detecting the displacement of automatic displacement of a mechanism for compressing and positioning the welding workpiece due to the deformation of the welding workpiece after welding;
the voltage detection module is used for detecting the voltage in the electric energy stored by the energy storage welding machine;
the current detection module is used for detecting the current output by the energy storage welding machine after the energy storage welding machine releases electric energy;
the pressure detection module and the displacement detection module are connected with the central processing module, and data detected by the pressure detection module and the displacement detection module are transmitted to the central processing module for operation processing to form a control command and data parameters;
the current detection module and the voltage detection module are respectively connected with the central processing module, a control instruction is formed after operation processing in the central processing module according to data detected by the voltage detection module and the current detection module, and the central processing module inputs the control instruction into the discharge control module or the charge control module to drive the discharge control module or the charge control module to work so as to release and control electric energy stored in the energy storage welding machine or charge and energy storage control of the energy storage welding machine.
3. The welding control system of the energy storage welding machine as defined in claim 2, wherein the energy storage welding machine comprises a three-phase power supply, a step-up transformer, a three-phase rectification module, an energy storage module and a welding transformer, the three-phase power supply is connected to the input end of the step-up transformer, and the three-phase rectification module, the energy storage module and the welding transformer are connected in parallel with each other; the emitter of the insulated gate bipolar transistor is connected with the energy storage module, the collector of the insulated gate bipolar transistor is connected with the welding transformer, and the gate of the insulated gate bipolar transistor is connected with the discharge control module; the output end of the welding transformer is provided with a pressure sensor and a displacement sensor, a pressure detection module is connected with the pressure sensor, a displacement detection module is connected with the displacement sensor, a current sensor is arranged on the current output end of the welding transformer, and a current detection module is connected with the current sensor; the charging control module is connected with the three-phase rectifying module, and the voltage detection module is connected with the energy storage module.
4. The welding control system of the energy storage welding machine as defined in claim 3, wherein the voltage detection module comprises a charging voltage HV, a voltage dividing circuit, a resistor R59, an operational amplifier U18A, an operational amplifier U18B, an optical coupler U24 and an operational amplifier U49A, the charging voltage HV is input from the energy storage module, is output to the voltage dividing circuit and then is input to the operational amplifier U18A and the operational amplifier U18B through a resistor R59 for operational amplification, an electrical signal after the operational amplification is input to the optical coupler U24 for isolation and output to the operational amplifier U49A for voltage reduction and sampling, and the signal of the reduced sampling voltage is input to the central processing module.
5. The weld control system of the energy storage welder according to claim 3, wherein the current detection module includes an output current Signal _ MU, an integration circuit U71A, a fine filter shaping circuit U71B, and a fine filter shaping circuit U71C; the output current Signal _ MU is input by the current sensor and output to the integrating circuit U71A to restore the sampling current, and the restored sampling current is filtered and shaped by the precise filter shaping circuit U71B and the precise filter shaping circuit U71C and output to the central processing module.
6. The weld control system of the energy storage welder of claim 3, wherein the pressure detection module includes an output current Signal _ YL and an operational amplifier U49D; the output current Signal _ YL is input by the pressure sensor and output to the operational amplifier U49D, and the output end of the operational amplifier U49D is connected with the central processing module.
7. The weld control system of the energy storage welder of claim 3, wherein the displacement detection circuit includes an output current Signal _ WY and an operational amplifier U49C; the output current Signal _ WY is input by the displacement sensor and output to the operational amplifier U49C, and the output end of the operational amplifier U49C is connected with the central processing module.
8. The welding control system of the energy storage welder as claimed in claim 3, wherein the charging control module comprises a charging pulse PWM MAC, an optocoupler U43 and a pulse transformer T3, the charging pulse PWM MAC is inputted by the central processing module and outputted into the optocoupler U43, the optocoupler U43 is connected to the pulse transformer T3, and the output terminal of the pulse transformer T3 is connected to the three-phase rectification module.
9. The weld control system of the energy storage welder of claim 3, wherein the discharge control module includes a discharge pulse PWMA, an optocoupler U50, a transistor Q8, a transistor Q15, and a transistor Q16; the discharging pulse PWMA is input by a central processing module and output to an optical coupler U50, the optical coupler U50 is connected with a triode Q8, the triode Q8 is respectively connected with a triode Q15 and a triode Q16, and emitting electrodes of the triode Q15 and the triode Q16 are both connected with a gate electrode of an insulated gate bipolar transistor IGBT.
10. The welding control system of the energy storage welding machine as defined in claim 3, further comprising a power supply system for supplying power to each module in the control system, and a charging protection module for charging the energy storage module, wherein the power supply system comprises a PCB power supply, an anti-interference module and a 24V switch power supply, the PCB power supply, the anti-interference module and the 24V switch power supply are connected in series, and the PCB power supply supplies power to each module of the control system.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110421244A (en) * | 2019-08-27 | 2019-11-08 | 无锡海菲焊接设备有限公司 | The welding control system of percussion welder |
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2019
- 2019-08-27 CN CN201921402395.2U patent/CN210413018U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110421244A (en) * | 2019-08-27 | 2019-11-08 | 无锡海菲焊接设备有限公司 | The welding control system of percussion welder |
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