CN204018946U - A kind of resistance spot welding power supply control system of dual processor - Google Patents
A kind of resistance spot welding power supply control system of dual processor Download PDFInfo
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- CN204018946U CN204018946U CN201420316914.4U CN201420316914U CN204018946U CN 204018946 U CN204018946 U CN 204018946U CN 201420316914 U CN201420316914 U CN 201420316914U CN 204018946 U CN204018946 U CN 204018946U
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Abstract
A resistance spot welding power supply control system for dual processor, comprises dsp controller, ARM controller, signal sampling and conditioning module, PWM drive circuit, full bridge inverter, DA conversion and comparison circuit, LCD module and STC single-chip microcomputer one line touch modules; Signal sampling and conditioning module gather the running parameter of resistance spot welding power supply, and by A/D interface, running parameter are inputted dsp controller, also running parameter are input to DA conversion and comparison circuit simultaneously; Preset standard value is outputted to DA conversion and comparison circuit and above-mentioned running parameter by D/A interface and compares by dsp controller; Comparative result is inputted dsp controller by D/A conversion and comparison circuit; Dsp controller makes FEEDBACK CONTROL according to result; Running parameter is inputted ARM controller by dsp controller, and running parameter is inputted LCD module and shows by ARM controller; Described STC single-chip microcomputer one line touch modules for the treatment of touch data, and is transferred to described ARM controller, and described ARM controller is dealt with according to described touch data.The utility model adopts dual processor control model, makes full use of DSP Digital Signals and ARM real time signal processing advantage, and both have complementary advantages, and improves control performance and the serviceability of resistance spot welding power supply.
Description
Technical field
The utility model relates to resistance spot welding power supply field, particularly a kind of resistance spot welding power supply control system of dual processor.
Background technology
Resistance spot welding, because its production efficiency is high, welding quality is good, low cost, saving material, working condition are good, be easy to the outstanding advantages such as automation, is widely used in each industrial departments such as Aeronautics and Astronautics, the energy, electronics, automobile, light industry.
Spot welding power is the core of resistance spot welding, decides the quality of final welding quality.At present, the development trend of domestic and international resistance spot welding power supply and research direction are mainly reflected in several aspects such as intellectuality, digitlization, automation and systematization.Research and development perfect performance, practical resistance spot welding power supply control system have very important meaning.
China is as welding big country, and resistance spot welding power supply demand also grows with each passing day.Until today, domestic quality requires that high accurate spot welding market is still monopolized for a long time by the equipment of the developed countries such as American-European and Japan, and the Quality Control Technology improving precision resistance spot welding power has become the task of top priority on welding circle of China.
Utility model content
The purpose of this utility model is: the resistance spot welding power supply control system providing a kind of dual processor, comprise dsp controller, ARM controller, signal sampling and conditioning module, PWM drive circuit, full bridge inverter, DA conversion and comparison circuit, LCD module and STC single-chip microcomputer one line touch modules, described dsp controller is connected with described signal sampling and conditioning module by A/D interface, described dsp controller is by D/A interface, I/O interface changes with described D/A and comparison circuit is connected, described dsp controller is by PWM interface and described PWM drive circuit, described PWM drive circuit is connected with described full bridge inverter, described full bridge inverter is used for the output of controlling resistance spot welding power weldingvoltage and electric current, described dsp controller is connected with described ARM controller, described ARM controller is connected with described LCD module by LCD interface, described ARM controller is connected with described STC single-chip microcomputer one line touch modules,
Described signal sampling and conditioning module gather the running parameter of resistance spot welding power supply, and by A/D interface, described running parameter is inputted described dsp controller, also described running parameter is inputted described D/A to change and comparison circuit, the running parameter of described resistance spot welding power supply comprises primary current, secondary voltage and secondary current signal simultaneously;
Preset standard value is inputted described D/A by D/A interface and changes and comparison circuit by described dsp controller, and described running parameter and described preset standard value compare by described D/A conversion and comparison circuit;
Comparative result is inputted described dsp controller by the I/O interface of dsp controller by described D/A conversion and comparison circuit;
Described dsp controller makes FEEDBACK CONTROL according to described comparative result: when described running parameter is on the low side relative to described preset standard value or higher, then described dsp controller regulates PWM wave frequency and dutycycle, and amplify through described PWM drive circuit, and then control increase or the reduction of full bridge inverter output current and voltage, thus realize the constant current of resistance spot welding power supply, constant voltage and constant power output;
Described running parameter is inputted described ARM controller by described dsp controller, and described running parameter is inputted described LCD module and shows by described ARM controller;
Described STC single-chip microcomputer one line touch modules for the treatment of touch data, and is transferred to described ARM controller, and described ARM controller is dealt with according to described touch data.
Described dsp controller adopts the TMS320F28335 chip of TI company.
Described ARM controller adopts the S5PV210 chip of SAMAUNG company.
Be connected by dual port RAM, RS232 serial ports or middle fracture between described dsp controller with described ARM controller.
Described signal sampling and conditioning module comprise secondary current signal sample circuit and secondary current signal conditioning circuit, primary current signal sample circuit and primary current signal modulate circuit, secondary voltage signals sample circuit and secondary voltage signals modulate circuit.
Described primary current signal sample circuit and primary current signal modulate circuit adopt existing current signal sample circuit and existing current signal conditioning circuit respectively, and secondary voltage signals sample circuit and secondary voltage signals modulate circuit adopt existing voltage signal sampling circuit and existing voltage signal conditioning circuit respectively.
Described primary current signal sample circuit adopts the outer integration metering system of Luo-coil to measure welding circuit electric current, and described current signal sample circuit comprises Luo-coil, self-induction coil L, resistance R and turn-to-turn capacitance Co; Described primary current signal modulate circuit is used for the output voltage of current signal sample circuit to carry out Integral Processing, described current signal conditioning circuit comprises integrating resistor R and integrating capacitor C, also comprise static balancing resistance Rp, be used for compensating the imbalance that produces of bias current, also comprise the integrator drift bleeder resistance Rf in parallel with described integrating capacitor, be used for the saturated or cut off phenomenon preventing integrator drift from causing.
The full name of Luo-coil is Rogowski coil, is the loop coil of a uniform winding on nonferromugnetic material.
Described full bridge inverter comprises four power switch pipes Q1, Q2, Q3 and Q4, and described switching tube Q1 and Q3 forms leading-bridge, and described Q2 and Q4 forms lagging leg; Also comprise the resonant element be made up of transformer T1, the inductance L r of primary side series connection and the output capacitance of power switch pipe; Described full bridge inverter adopts soft-switch PWM control technology, realizes the conducting under power switch pipe zero voltage condition and shutoff, adjustable four road pwm signal frequency and dutycycles, and then controls frequency and the phase place of output voltage.
Described STC single-chip microcomputer one line touch modules comprises the four-wire type electric resistance touch screen, touch screen controller and the STC single-chip microcomputer that connect successively, described touch screen controller is used for collection touch data, and by SPI interface, described touch screen data is sent to described STC single-chip microcomputer and processes; Described STC single-chip microcomputer directly sends treated touch screen data to described ARM controller by I/O interface.
The model of described touch screen controller is IA7843.
The model of described STC single-chip microcomputer is STC12LE4052.
The utility model also comprises switching signal control circuit, and described dsp controller is connected with described switching signal control circuit by I/O interface, and described switching signal control circuit comprises switch input signal circuit and switch output signal circuit; The signal that described dsp controller is inputted by switch input signal circuit described in I/O interface, selects corresponding preset standard value; Described comparative result is transferred to described switch output signal circuit by I/O interface by described dsp controller, described switch output signal circuit controls the break-make of external equipment according to described comparative result, described external equipment comprise in blower fan, temperature controller and contactor more than one.
Described switch input signal circuit comprises many group optocoupler input circuits, and described preset standard value is many groups, and described switch output signal circuit comprises many group optocoupler output circuits.
The utility model also comprises encrypted circuit, and described dsp controller is connected with described encrypted circuit by I/O interface, and described encrypted circuit is used for the information encryption of dsp controller, prevents the illegal copies of the internal processes of unwarranted access or dsp controller.
The utility model also comprised/under-voltage protecting circuit; described dsp controller is connected with described mistake/under-voltage protecting circuit by I/O interface; whether described mistake/under-voltage protecting circuit occurred for detecting resistance spot welding power supply/and under-voltage; and when overvoltage/undervoltage occurs; disconnect PWM to export, protection full bridge inverter.
Control principle of the present utility model is as follows:
System electrification also, after initializing, waits for that outside input starts welding signal;
When receiving a welding signal, first reading overvoltage/undervoltage circuit input value, judging that Power supply occurs with or without mistake/undervoltage condition, if there is overvoltage/undervoltage, then carrying out fault alarm, simultaneously starting device self-shield, comprise shutoff PWM and export to protect inverter circuit; If fault-free, welding parameter standard value that is that arrange according to this locality or outside input, regulates PWM to export by DSP, and then controls inverter circuit output;
Next AD sampled value is read, comprise primary current, secondary current and secondary voltage value, read value and standard value are compared, when collection signal is on the low side or higher relative to standard value, PWM is regulated by DSP, control phase induced current and voltage output increase and reduce, realizing the constant current of spot welding power, constant voltage and constant power output; If two values are in same span, then maintain PWM and export constant;
Then the AD sampled value of reading is sent to dual port RAM, after being sent, then returning and start next round cyclic process.
Relative to prior art, the utility model has following beneficial effect:
1, the utility model adopts dual processor control model, make full use of DSP Digital Signals and ARM real time signal processing advantage, wherein DSP is responsible for the realization of the collection of welding parameter, complex control and algorithm, ARM mainly completes data storage, transmission as application processor and man-machine interface is mutual in real time, both have complementary advantages, and greatly will improve control performance and the serviceability of resistance spot welding power supply.
2, current signal sample circuit of the present utility model adopts the outer integration metering system of Luo-coil, can easily and accurately measure welding circuit big current, has that measurement category is wide, response band is wide, volume is little, easy for installation and low cost and other advantages.
3, full bridge inverter of the present utility model adopts soft-switch PWM control technology, realizes the conducting under power switch pipe zero voltage condition and shutoff, regulates four road pwm signal frequency and dutycycles, and then controls frequency and the phase place of output voltage.
4, STC single-chip microcomputer one line touch modules of the present utility model directly sends touch data to ARM controller by a road I/O mouth by STC single-chip microcomputer, does not use the touch screen interface that arm processor carries.Show through actual verification, STC single-chip microcomputer one line touch modules fast response time, touch precisely, non-jitter and ghost phenomena, can obtain and better touch effect.
5, realize data interaction by dual port RAM between DSP and ARM two control systems, be conducive to improving data transmission bauds, ensure the real-time of system and the ability processing data.
Accompanying drawing explanation
Fig. 1 is system construction drawing of the present utility model;
Fig. 2 is the primary current signal sample circuit figure of signal sampling of the present utility model and conditioning module;
Fig. 3 is the primary current signal modulate circuit figure of signal sampling of the present utility model and conditioning module;
Fig. 4 is full bridge inverter figure of the present utility model;
Fig. 5 is the interface circuit figure of STC single-chip microcomputer one line touch modules of the present utility model;
Fig. 6 is dual port RAM interface circuit figure of the present utility model;
Fig. 7 is system control process figure of the present utility model;
Fig. 8 is switching signal control circuit figure of the present utility model;
Fig. 9 is encrypted circuit figure of the present utility model;
Figure 10 is mistake of the present utility model/under-voltage protecting circuit figure.
Detailed description of the invention
Refer to Fig. 1.The resistance spot welding power supply control system of a kind of dual processor of the present utility model comprises dsp controller, ARM controller, signal sampling and conditioning module, PWM drive circuit, full bridge inverter, DA conversion and comparison circuit, LCD module and STC single-chip microcomputer one line touch modules, described dsp controller is connected with described signal sampling and conditioning module by A/D interface, described dsp controller is by D/A interface, I/O interface changes with described D/A and comparison circuit is connected, described dsp controller is by PWM interface and described PWM drive circuit, described PWM drive circuit is connected with described full bridge inverter, described full bridge inverter is used for the output of controlling resistance spot welding power weldingvoltage and electric current, described dsp controller is connected with described ARM controller, described ARM controller is connected with described LCD module by LCD interface, described ARM controller is connected with described STC single-chip microcomputer one line touch modules,
Described signal sampling and conditioning module gather the running parameter of resistance spot welding power supply, and by A/D interface, described running parameter is inputted described dsp controller, also described running parameter is inputted described D/A to change and comparison circuit, the running parameter of described resistance spot welding power supply comprises primary current, secondary voltage and secondary current signal simultaneously;
Preset standard value is inputted described D/A by D/A interface and changes and comparison circuit by described dsp controller, and described running parameter and described preset standard value compare by described D/A conversion and comparison circuit;
Comparative result is inputted described dsp controller by the I/O interface of dsp controller by described D/A conversion and comparison circuit;
Described dsp controller makes FEEDBACK CONTROL according to described comparative result: when described running parameter is on the low side relative to described preset standard value or higher, then described dsp controller regulates PWM wave frequency and dutycycle, and amplify through described PWM drive circuit, and then control increase or the reduction of full bridge inverter output current and voltage, thus realize the constant current of resistance spot welding power supply, constant voltage and constant power output;
Described running parameter is inputted described ARM controller by described dsp controller, and described running parameter is inputted described LCD module and shows by described ARM controller;
Described STC single-chip microcomputer one line touch modules for the treatment of touch data, and is transferred to described ARM controller, and described ARM controller makes corresponding execution according to described touch data.
Refer to Fig. 8.The utility model also comprises switching signal control circuit, and described dsp controller is connected with described switching signal control circuit by I/O interface, and described switching signal control circuit comprises switch input signal circuit and switch output signal circuit; The signal that described dsp controller is inputted by switch input signal circuit described in I/O interface, selects corresponding preset standard value; Described comparative result is transferred to described switch output signal circuit by I/O interface by described dsp controller, described switch output signal circuit controls the break-make of external equipment according to described comparative result, described external equipment comprise in blower fan, temperature controller and contactor more than one.
Described switch input signal circuit comprises many group optocoupler input circuits, and described preset standard value is many groups, and described switch output signal circuit comprises many group optocoupler output circuits.
Refer to Fig. 9.The utility model also comprises encrypted circuit, and described dsp controller is connected with described encrypted circuit by I/O interface, and described encrypted circuit is used for the information encryption of dsp controller, prevents the illegal copies of the internal processes of unwarranted access or dsp controller.
Refer to Figure 10.The utility model also comprised/under-voltage protecting circuit; described dsp controller is connected with described mistake/under-voltage protecting circuit by I/O interface; whether described mistake/under-voltage protecting circuit occurred for detecting resistance spot welding power supply/and under-voltage; and when overvoltage/undervoltage occurs; disconnect PWM to export, protection full bridge inverter.
Described dsp controller adopts the TMS320F28335 chip of TI company.
Described ARM controller adopts the S5PV210 chip of SAMAUNG company.
Refer to Fig. 6.Be connected by dual port RAM between described dsp controller with described ARM controller.Along with the increase of sampled data output, require more and more higher to the transmission of data, can the interface of high-speed transferring data if do not had between two system ports, the obstruction that data will be caused to transmit, has a strong impact on the real-time of system and the ability processing data.Fig. 6 is the interface circuit figure based on IDT70261, IDT70261 is the dual-port SRAM of high speed 16K × 16 that American I DT company produces, there is two covers completely independently data/address bus, address bus and control bus, allow read-write wherein any one memory cell that two controllers are independent or asynchronous.This system adopts interrupts controlling mechanism, and some functional pins of two-port RAM do not need whole use.Two-port RAM left end connects dsp controller TMS320F28335, and right-hand member connects ARM controller S5PV210.Two-port RAM two independently data wire D0L-D15L with D0R-D15R is connected with above-mentioned controller respectively, and independently address wire A0L-A13L and A0R-A13R are also connected with above-mentioned two controllers respectively./ CE is chip enable pin, and R/W is Read-write Catrol pin, and/OE is output enable pin, and/INT is interrupt identification pin, and/BUSY is that busy controls pin.
Be connected by RS232 serial ports or middle fracture between described dsp controller with described ARM controller.
Refer to Fig. 2-3.Described signal sampling and conditioning module comprise secondary current signal sample circuit and secondary current signal conditioning circuit, primary current signal sample circuit and primary current signal modulate circuit, secondary voltage signals sample circuit and secondary voltage signals modulate circuit.
Described secondary current signal sample circuit adopts the outer integration metering system of Luo-coil to measure welding circuit electric current; Described secondary current signal conditioning circuit is used for the output voltage of current signal sample circuit to carry out Integral Processing, described secondary current signal conditioning circuit comprises integrating resistor R and integrating capacitor C, also comprise static balancing resistance Rp, be used for compensating the imbalance that produces of bias current, also comprise the integrator drift bleeder resistance Rf in parallel with described integrating capacitor, be used for the saturated or cut off phenomenon preventing integrator drift from causing.
The full name of Luo-coil is Rogowski coil, is the loop coil of a uniform winding on nonferromugnetic material.
Described primary current signal sample circuit and primary current signal modulate circuit adopt existing current signal sample circuit and existing current signal conditioning circuit respectively, and secondary voltage signals sample circuit and secondary voltage signals modulate circuit adopt existing voltage signal sampling circuit and existing voltage signal conditioning circuit respectively.
In secondary current signal sample circuit, accurately obtaining welding current parameter is very the key link in precise hard_drawn tuhes process.Resistance spot welding welding circuit impedance is low, and welding current is up to thousands of to tens thousand of ampere, and Measurement accuracy welding current virtual value has quite large difficulty.Adopt the outer integration metering system of Luo-coil can easily and accurately measure welding circuit big current, have that measurement category is wide, response band is wide, volume is little, easy for installation and low cost and other advantages.In Fig. 2, I (t) is welding current, and M is the mutual inductance between bus and coil, and E is the induced electromotive force of Luo-coil, and L, R, Co, Uo are the self-induction of coil, resistance, turn-to-turn capacitance and output voltage respectively.
In current signal conditioning circuit, the output voltage obtained due to above-mentioned Luo-coil method is directly proportional to tested derivative of current, so first signal must be carried out Integral Processing, obtains the voltage signal be directly proportional to tested electric current.In Fig. 3, Ui is the output voltage of current signal sampling in Fig. 2, and R is integrating resistor, and C is integrating capacitor, and the size of timeconstantτ=RC, τ determines the speed of integrating rate.Rp is static balancing resistance, is used for compensating the imbalance that produces of bias current.The resistance Rf of integrating capacitor two ends parallel connection is integrator drift bleeder resistance, is used for the saturated or cut off phenomenon preventing integrator drift from causing.
Refer to Fig. 4.Described full bridge inverter comprises four power switch pipes Q1, Q2, Q3 and Q4, and described switching tube Q1 and Q3 forms leading-bridge, and described Q2 and Q4 forms lagging leg; Also comprise the resonant element be made up of transformer T1, the inductance L r of primary side series connection and the output capacitance of power switch pipe.In full bridge inverter, in a complete switch periods, make the conducting under no-voltage successively of four power switch pipes by resonance, zero voltage turn-off under the effect of power tube output capacitance.Adopt soft-switch PWM control technology, realize the conducting under power switch pipe zero voltage condition and shutoff, adjustable four road pwm signal frequency and dutycycles, and then control frequency and the phase place of output voltage.
Refer to Fig. 5.Described STC single-chip microcomputer one line touch modules comprises four-wire type (TSXP, TSYP, TSXM, TSYM) electric resistance touch screen, touch screen controller and the STC single-chip microcomputer that connect successively, described touch screen controller is used for collection touch data, and described touch screen data is sent to described STC single-chip microcomputer is processed by SPI interface (data export SPIDO, data input SPIDIN, data clock SPICLK); Described STC single-chip microcomputer directly sends treated touch screen data to described ARM controller by I/O interface.Show through actual verification, STC single-chip microcomputer one line touch modules fast response time, touch precisely, non-jitter and ghost phenomena, can obtain and better touch effect.
The model of described touch screen controller is IA7843.
The model of described STC single-chip microcomputer is STC12LE4052.Described STC single-chip microcomputer is used for writing SCM program and related algorithm, carries out debounce, filtering and calibration calculations process to touch screen data data.
Refer to Fig. 7.Control principle of the present utility model is as follows:
System electrification also, after initializing, waits for that outside input starts welding signal;
When receiving a welding signal, first reading overvoltage/undervoltage circuit input value, judging that Power supply occurs with or without mistake/undervoltage condition, if there is overvoltage/undervoltage, then carrying out fault alarm, simultaneously starting device self-shield, comprise shutoff PWM and export to protect inverter circuit; If fault-free, welding parameter standard value that is that arrange according to this locality or outside input, regulates PWM to export by DSP, and then controls inverter circuit output;
Next AD sampled value is read, comprise primary current, secondary current and secondary voltage value, read value and standard value are compared, when collection signal is on the low side or higher relative to standard value, PWM is regulated by DSP, control phase induced current and voltage output increase and reduce, realizing the constant current of spot welding power, constant voltage and constant power output; If two values are in same span, then maintain PWM and export constant;
Then the AD sampled value of reading is sent to dual port RAM, after being sent, then returning and start next round cyclic process.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change above-mentioned embodiment and revise.Therefore, the utility model is not limited to detailed description of the invention disclosed and described above, also should fall in the protection domain of claim of the present utility model modifications and changes more of the present utility model.In addition, although employ some specific terms in this description, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (10)
1. the resistance spot welding power supply control system of a dual processor, it is characterized in that: comprise dsp controller, ARM controller, signal sampling and conditioning module, PWM drive circuit, full bridge inverter, DA conversion and comparison circuit, LCD module and STC single-chip microcomputer one line touch modules, described dsp controller is connected with described signal sampling and conditioning module by A/D interface, described dsp controller is by D/A interface, I/O interface changes with described D/A and comparison circuit is connected, described dsp controller is by PWM interface and described PWM drive circuit, described PWM drive circuit is connected with described full bridge inverter, described full bridge inverter is used for the output of controlling resistance spot welding power weldingvoltage and electric current, described dsp controller is connected with described ARM controller, described ARM controller is connected with described LCD module by LCD interface, described ARM controller is connected with described STC single-chip microcomputer one line touch modules,
Described signal sampling and conditioning module gather the running parameter of resistance spot welding power supply, and by A/D interface, described running parameter is inputted described dsp controller, also described running parameter is inputted described D/A to change and comparison circuit, the running parameter of described resistance spot welding power supply comprises primary current, secondary voltage and secondary current signal simultaneously;
Preset standard value is inputted described D/A by A/D interface and changes and comparison circuit by described dsp controller, and described running parameter and described preset standard value compare by described D/A conversion and comparison circuit;
Comparative result is inputted described dsp controller by the I/O interface of dsp controller by described D/A conversion and comparison circuit;
Described dsp controller makes FEEDBACK CONTROL according to described result: when described running parameter is on the low side relative to described preset standard value or higher, then described dsp controller regulates PWM wave frequency and dutycycle, and amplify through described PWM drive circuit, and then control the output current of full bridge inverter and the increase of voltage or reduction, thus realize the constant current of resistance spot welding power supply, constant voltage and constant power output;
Described running parameter is inputted described ARM controller by described dsp controller, and described running parameter is inputted described LCD module and shows by described ARM controller;
Described STC single-chip microcomputer one line touch modules for the treatment of touch data, and is transferred to described ARM controller, and described ARM controller is dealt with according to described touch data.
2. the resistance spot welding power supply control system of a kind of dual processor according to claim 1, is characterized in that: be connected by dual port RAM, RS232 serial ports and middle fracture between described dsp controller with described ARM controller.
3. the resistance spot welding power supply control system of a kind of dual processor according to claim 1, it is characterized in that: described signal sampling and conditioning module comprise secondary current signal sample circuit and secondary current signal conditioning circuit, primary current signal sample circuit and primary current signal modulate circuit, secondary voltage signals sample circuit and secondary voltage signals modulate circuit, described primary current signal sample circuit adopts the outer integration metering system of Luo-coil to measure welding circuit electric current, described primary current signal sample circuit comprises Luo-coil, self-induction coil L, resistance R and turn-to-turn capacitance Co, described current signal conditioning circuit is used for the output voltage of current signal sample circuit to carry out Integral Processing, described current signal conditioning circuit comprises integrating resistor R and integrating capacitor C, also comprise static balancing resistance Rp, be used for compensating the imbalance that produces of bias current, also comprise the integrator drift bleeder resistance Rf in parallel with described integrating capacitor, be used for the saturated or cut off phenomenon preventing integrator drift from causing.
4. the resistance spot welding power supply control system of a kind of dual processor according to claim 1, it is characterized in that: described full bridge inverter comprises four power switch pipes Q1, Q2, Q3 and Q4, described switching tube Q1 and Q3 forms leading-bridge, and described Q2 and Q4 forms lagging leg; Also comprise the resonant element be made up of transformer T1, the inductance L r of primary side series connection and the output capacitance of power switch pipe; Described full bridge inverter adopts soft-switch PWM control technology, realizes the conducting under power switch pipe zero voltage condition and shutoff, adjustable four road pwm signal frequency and dutycycles, and then controls frequency and the phase place of output voltage.
5. the resistance spot welding power supply control system of a kind of dual processor according to claim 1, it is characterized in that: described STC single-chip microcomputer one line touch modules comprises the four-wire type electric resistance touch screen, touch screen controller and the STC single-chip microcomputer that connect successively, described touch screen controller is used for collection touch data, and by SPI interface, described touch screen data is sent to described STC single-chip microcomputer and processes; Described STC single-chip microcomputer directly sends treated touch screen data to described ARM controller by I/O interface.
6. the resistance spot welding power supply control system of a kind of dual processor according to claim 5, is characterized in that: the model of described STC single-chip microcomputer is STC12LE4052, and the model of described touch screen controller is IA7843.
7. the resistance spot welding power supply control system of a kind of dual processor according to claim 1, is characterized in that: described dsp controller adopts the TMS320F28335 chip of TI company, and described ARM controller adopts the S5PV210 chip of SAMAUNG company.
8. the resistance spot welding power supply control system of a kind of dual processor according to any one of claim 1-7, it is characterized in that: also comprise switching signal control circuit, described dsp controller is connected with described switching signal control circuit by I/O interface, and described switching signal control circuit comprises switch input signal circuit and switch output signal circuit; The signal that described dsp controller is inputted by switch input signal circuit described in I/O interface, selects corresponding preset standard value; Described comparative result is transferred to described switch output signal circuit by I/O interface by described dsp controller, described switch output signal circuit controls the break-make of external equipment according to described comparative result, described external equipment comprise in blower fan, temperature controller and contactor more than one; Described switch input signal circuit comprises many group optocoupler input circuits, and described preset standard value is many groups, and described switch output signal circuit comprises many group optocoupler output circuits.
9. the resistance spot welding power supply control system of a kind of dual processor according to any one of claim 1-7, it is characterized in that: also comprise encrypted circuit, described dsp controller is connected with described encrypted circuit by I/O interface, described encrypted circuit is used for the information encryption of dsp controller, prevents the illegal copies of the internal processes of unwarranted access or dsp controller.
10. the resistance spot welding power supply control system of a kind of dual processor according to any one of claim 1-7; it is characterized in that: also comprised/under-voltage protecting circuit; described dsp controller is connected with described mistake/under-voltage protecting circuit by I/O interface; whether described mistake/under-voltage protecting circuit occurred for detecting resistance spot welding power supply/and under-voltage; and when overvoltage/undervoltage occurs; disconnect PWM to export, protection full bridge inverter.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104107977A (en) * | 2014-06-13 | 2014-10-22 | 广东省自动化研究所 | Resistance spot welding power control system with double processors |
| WO2018192038A1 (en) * | 2017-04-20 | 2018-10-25 | 天津商科数控技术股份有限公司 | Direct contact- and alternating current trapezoidal wave-based electric resistance welding process method of aluminum |
| CN109831289A (en) * | 2019-01-21 | 2019-05-31 | 江苏理工学院 | Three rank memristor Dendrolimus kikuchii chaotic oscillators |
-
2014
- 2014-06-13 CN CN201420316914.4U patent/CN204018946U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104107977A (en) * | 2014-06-13 | 2014-10-22 | 广东省自动化研究所 | Resistance spot welding power control system with double processors |
| WO2018192038A1 (en) * | 2017-04-20 | 2018-10-25 | 天津商科数控技术股份有限公司 | Direct contact- and alternating current trapezoidal wave-based electric resistance welding process method of aluminum |
| CN109831289A (en) * | 2019-01-21 | 2019-05-31 | 江苏理工学院 | Three rank memristor Dendrolimus kikuchii chaotic oscillators |
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