CN202344104U - Multifunctional digital welding machine - Google Patents
Multifunctional digital welding machine Download PDFInfo
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- CN202344104U CN202344104U CN2011203751201U CN201120375120U CN202344104U CN 202344104 U CN202344104 U CN 202344104U CN 2011203751201 U CN2011203751201 U CN 2011203751201U CN 201120375120 U CN201120375120 U CN 201120375120U CN 202344104 U CN202344104 U CN 202344104U
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Abstract
The utility model provides a multifunctional digital welding machine, comprising a full-bridge type inverter main circuit formed by an IGBT (insulated gate bipolar translator), a control circuit, and a CPLD (complex programmable logic device) or FPGA (field programmable gate array)-based symmetrical carrier wave soft switch PWM (pulse-width modulation) driving circuit. The inverter main circuit comprises a rectifying filtering module, an IGBT full-bridge inverter module, a main transformer and a secondary rectifying filtering module. The control circuit comprises a DSP (digital signal processor) control processor and a manual drop idle circuit; a circuit for adjusting, detecting and sampling feedback current and voltage signal output by the welding machine; a circuit for acquiring and setting wire feed rate and given voltage of the welding machine; an interface of an external keyboard and a parameter display circuit; and a communication circuit connected with a PC (personal computer). The current voltage and signal adjusting and sampling circuit comprises: a hall voltage sensor used for detecting the output feedback arc voltage of the welding machine and a hall current sensor used for detecting the output current of the welding machine; and the sampling circuit comprises a circuit for acquiring the given voltage and the given current, i.e. the wire feed rate, on a panel of a wire feeder.
Description
Technical field
The utility model belongs to the multifunctional digital inverter type welder, is specifically related to a kind of multifunctional digital soft-switching inversion welding machine based on digital signal processor DSP and programmable logic controller (PLC) CPLD or FPGA.
Background technology
Because traditional welding machine volume is big, efficient is low, and static and dynamic performance is not very desirable, causes welder performance poor; Existing welding machine still is the mode of logic circuit control on being provided with, and the design of multifunctional digital welding machine is not arranged.But the multifunctional digital welding machine is the collection manual welding, dc argon arc welding, and pulsed argon arc welding, gas is protected weldering, and pulse gas is protected the new welder of multiple welding procedure such as weldering and one, and its feature richness is stable and reliable for performance.The multifunctional digital inverter type welder mainly is by DSP; Embedded microprocessors such as single-chip microcomputer are controlled, and the digitlization inverter type welder utilizes two closed-loop controls of the Intelligent Fuzzy Control algorithm use software realization butt welding machine system of computer because adopt the controller of embedded microprocessor structure arc welding inverter; And replaced the analog controller of forming by numerous discrete components; Well realized the Digital Control of the source of welding current, and adjustment that can be real-time with parameters of welding and duty are set, improved the operating efficiency of welding machine to a great extent; And its control method is more flexible, and response speed is faster.
Summary of the invention
It is reliable that the purpose of the utility model provides a kind of function-stable; The multifunctional digital inverter type welder that welding performance is good; This digitlization welding machine is a core with digital signal processor DSP and programmable logic controller (PLC) CPLD or FPGA, the high-speed real-time disposal ability of DSP is dissolved in the welder system, and is combined CPLD or FPGA and soft switch shifting inversion technology; Realization is to two closed-loop controls of welding power source integral system; Become more meticulous energy control of employing, the external characteristics of control change device cooperates arc load, solves the arc length stability of little electric current, low arc length welding.
The technical scheme of the utility model is following: the multifunctional digital inverter type welder, comprise the full-bridge type inverter main circuit of forming by IGBT, and control circuit is based on the soft-switch PWM drive circuit of the symmetrical carrier wave of CPLD or FPGA.Said inverter main circuit comprises rectification filtering module b, IGBT full-bridge inverting module c, main transformer d, and secondary rectification filtering module e;
Said control circuit comprises: DSP controls processor; Idler circuit falls in control panel power supply circuit by hand; The feedback current of welding machine output, the voltage signal conditioning detects and sample circuit; The collection of welding machine wire feed rate and given voltage and initialization circuit; Interface and parameter display circuit with external keyboard; Be connected (RS485) telecommunication circuit with PC;
Said craft is fallen idler circuit and is comprised that rectifier circuit, filtering, voltage stabilizing and optocoupler are input to the capture function pin of DSP, the signal circuit of the unloaded output voltage of DSP output control welding machine or the relay of fully loaded output voltage;
Said current and voltage signals conditioning comprises with sample circuit: the Hall voltage sensor and the Hall current sensor that detects the welding machine output current that are used to detect welding machine output feedback arc voltage; Take corresponding current/voltage modulate circuit to carry out amplitude limit; After overvoltage sensor SEN1 carries out isolation detection, after resistance capacitance filtering, carry out follow-up amplifier through operational amplifier U1, sampled voltage UFO amplitude limit is received again the analog input port ADCIN0 of DSP in the 0-3.3V scope; Feedback current signal for the Hall current sensor detection; The add circuit that process rc filter circuit and amplifier are carried out signal condition and be made up of amplifier U4 is limited in the analog input pin ADCIN1 that receives DSP in the 0-3.3V scope again through amplifying and following with sample rate current IFO again;
Sample circuit comprises that given voltage and the given electric current on the wire-feed motor panel is the Acquisition Circuit of wire feed speed, and given current/voltage value meets analog input port ADCIN3 and the ADCIN4 of DSP too after regulating amplification through amplifier; According to the current/voltage on the collection wire-feed motor,,, export the given and voltage given signal of corresponding wire feed rate through amplifying after the resistance capacitance filtering and through homophase through the task manager module generation two-way pwm signal of DSP.
Said CPLD or FPGA phase-shift soft switch control circuit are made up of DSP1 and CPLD or FPGA: feedback current IFO; Feedback voltage UFO and given electric current I G; Given voltage U G divides four the tunnel to be sent to AD in the sheet of DSP, and the data after gathering through AD realize the electric current and voltage closed-loop control in DSP; The incident management register of DSP is exported the pwm signal of effective pulsewidth; Again pwm signal is met CPLD or FPGA, four road PWM ripples of CPLD or FPGA output are as the soft switch circuit of the driving signal of exporting with realization IGBT; The data-interface of DSP and CPLD or FPGA connects external memory interface.Overheated, overvoltage, the interruption protection control of signals such as overcurrent is realized by DSP.
Sample rate current voltage four tunnel analog signals before delivering to DSP, again through diode DD1, DD2, DD3, DD4 carries out amplitude limit, in order to avoid the too high or too low entering of analog input voltage DSP port and defective chip.
The beneficial effect of the utility model is: adopt advanced digital signal processor DSP and programmable logic controller (PLC) CPLD or the FPGA core as the digitlization welding machine; Gather in real time the feedback voltage and the magnitude of current of the source of welding current accurately; And realize pulse width modulation and phase shifting control through the digital PID algorithm, realize the soft switch technique of the ZVZCS of leading arm of IGBT and lagging leg through phase shifting control, on the most multiple welding manner collection and the welding machine; Realized pulse gas guarantor weldering; Pulsed argon arc welding, multiple welding procedure mode such as manual welding, and utilize the sequential and the control of the JTAG mouth butt welding machine of DSP to carry out on-line debugging; Software upgrading and renewal speed are fast, and control mode is more versatile and flexible.The utility model digitlization welding machine can reduce and splashes, and moulding is attractive in appearance, realizes high-quality welding; The real-time selection of man machine communication interface and welding condition and state of the art and demonstration etc. have realized craft, the direct current argon arc; The pulse argon arc, gas is protected, five kinds of welding manners such as pulse gas guarantor; Improve the dynamic response capability of welding machine, guaranteed the welding quality of welding machine and the stability of electric arc.
Description of drawings
Fig. 1 is the overall structure figure of multifunctional digital welding machine.
Fig. 2 is based on the functional block diagram of the multifunctional digital welding machine of DSP.
Fig. 3 is the main control connecting circuit figure of the utility model based on DSP.
Fig. 4 is that unloaded partial circuit figure falls in the craft of control circuit.
Fig. 5 is the signal condition and the sample circuit figure of feedback current voltage and wire feed rate setting section.
Fig. 6 is the partial circuit figure that CPLD or FPGA phase-shift PWM signal produce.
Fig. 7 is RS485 telecommunication circuit figure.
The specific embodiment
The utility model multifunctional digital welding machine is based on the soft-switching inversion formula digitlization welding machine of digital signal processor DSP and programmable logic controller (PLC) CPLD or FPGA.Its operating circuit comprises the full-bridge type inverter main circuit of being made up of IGBT, and the DSP control circuit is based on the soft-switch PWM drive circuit of the symmetrical carrier wave of CPLD or FPGA.
Said main circuit is mainly by rectification filtering module b shown in Figure 1, IGBT full-bridge inverting module c, main transformer d, and composition such as secondary rectification filtering module e.
Said control circuit mainly comprises: DSP controls processor; The control panel power supply circuit; Idler circuit falls in the craft that contains rectifying part; The feedback current of welding machine output, the voltage signal conditioning detects and sample circuit; The collection of welding machine wire feed rate and given voltage and initialization circuit; Interface and parameter display circuit with external keyboard; With RS485 telecommunication circuit of PC etc.
Idler circuit falls in said craft at first will exchange the direct current 17V voltage of 12V power supply after through the rectification of B1 rectifier bridge as operating voltage Ud, and Ud is sent to optocoupler U6 through C23 after E5 filtering and the diode Z1 voltage stabilizing again; To produce the capture function pin that control signal dv_IN is input to DSP,, judge that according to the real work mode selecting is the weldingvoltage UF-of actual feedback or operating voltage Ud just often when DSP starts operation detection behind the level of this leg signal; The realization of this function is made up of output control signal dV_SEL control triode V3 and the relay K 1 of DSP; The colelctor electrode of relay K 1 series connection and triode V3, welding is not under the no-load condition, when DSP detects dv_IN and is low level; DSP output dV_SEL is a high level; Control relay is inhaled and, DSP this moment output pwm signal not, and the unloaded output voltage of welding machine is Ud; After welding rod and workpiece touching, Ud is near 0V; When DSP detects dv_IN is high level, and DSP output this moment dV_SEL is a low level, and control relay breaks off, this moment the DSP output pwm signal, at this moment the welding machine output voltage is an actual output voltage.
Said current and voltage signals conditioning comprises with sample circuit: be used to detect the Hall voltage sensor and the Hall current sensor that detects electric current of output voltage, to guarantee the isolation fully of sampled input signal and sampled output signal; Because the signal behind the process voltage-current sensor exceeds the analog signal voltage scope (0-3.3V) of DSP, take corresponding current/voltage modulate circuit to carry out amplitude limit; For the feedback arc voltage signal; After carrying out isolation detection through overvoltage sensor SEN1; After R7 and the filtering of C31 resistance capacitance; U1 follows through operational amplifier, after amplifying through the two-stage of amplifier U1, voltage U FO amplitude limit is sent to again the analog input port ADCIN0 of DSP in the 0-3.3V scope again; For the feedback current signal, be that elder generation is through R3, C29 equally; R4; After the rc filter circuit that C30 forms, carrying out signal condition by amplifier again, specifically is the add circuit of elder generation through being made up of amplifier U4; Pass through the U4 amplification again and follow that IFO is limited in the 0-3.3V scope, be sent to the analog input pin ADCIN1 of DSP then; Sample circuit comprises that also given voltage and the given electric current on the wire-feed motor panel is the collection of wire feed speed, and given current/voltage value is delivered to analog input port ADCIN3 and the ADCIN4 of DSP too after regulating amplification through amplifier U12.Four tunnel analog signals before delivering to DSP, again through diode DD1, DD2, DD3, DD4 carries out amplitude limit, in order to avoid the too high or too low entering of analog input voltage DSP port and defective chip.For the current/voltage on the wire-feed motor after gathering, through the task manager module generation two-way pwm signal of DSP, through R56; C42, R58 is after the resistance capacitance filtering of C43; Carry out homophase by U12 and amplify, just obtain the given and voltage given signal of corresponding wire feed rate.
Said telecommunication circuit is made up of the telecommunication circuit of the SN75176 that comprises 485 communication letter chips, realizes the serial communication between remote controller and the host computer.DSP carries asynchronous communication interface, converts the RS485 bus to through external chip U8 (SN75176), is the isolation that realizes bus and DSP in the circuit; Between DSP communication interface place and chip U8, adopt optocoupler to isolate optocoupler U9, U10; U11 respectively with the asynchronous serial port pin of DSP through resistance R 38, R39, R30 links to each other; With after U8 is connected, export the signal two ends voltage-stabiliser tube Z2 that connects respectively through three road signals of communication of optocoupler output, Z3 composition absorption circuit is to prevent the interference on the bus.
Said CPLD or FPGA phase-shift soft switch control circuit are made up of DSP U1 and CPLD or FPGA U3: feedback current IFO; Feedback voltage UFO and given electric current I G, given voltage U G divide four the tunnel to be sent to AD in the sheet of DSP, the data after gathering through AD; In DSP, realize the electric current and voltage closed-loop control; Adopt fuzzy control method, realize the digital PID adjusting, and welding process is carried out accurate Waveform Control; Calculate after switch time the pwm signal of exporting effective pulsewidth by the incident management register of DSP; Give CPLD or FPGA to confirm the size of phase shifting angle with pwm signal again, CPLD or FPGA make and obtain four road PWM ripples after phase shift is handled, as the driving signal of output to realize the soft switch circuit of IGBT.The data-interface of DSP and CPLD or FPGA realizes through external memory interface, and the IS pin through DSP expands to exterior I O mouth space with it, and its address bus links to each other with the IO mouth of CPLD or FPGA.
During practical implementation, DSP except that the data acquisition and calculation and PID fuzzy algorithmic approach that realize current/voltage, also will realize the external characteristics control to the source of welding current as master controller, and the accurate control like welding machine technology sequential comprises in advance and supplying gas, and striking lags behind and closes gas etc.; Also can produce external control signal in real time, comprise control, the braking of motor, rifle switching signal etc. air valve to wire feeder; Outside input button shows control for the selection of welding machine different working modes and the numeral of welding current voltage; To overheated, overvoltage, the interruption protection control of signals such as overcurrent etc. are all realized by DSP.
Claims (1)
1. the multifunctional digital welding machine is characterized in that comprising the full-bridge type inverter main circuit of being made up of IGBT, and control circuit is based on the soft-switch PWM drive circuit of the symmetrical carrier wave of CPLD or FPGA; Said inverter main circuit comprises rectification filtering module, IGBT full-bridge inverting module, main transformer and secondary rectification filtering module; Said control circuit comprises: DSP controls processor; Idler circuit falls in control panel power supply circuit by hand; The feedback current of welding machine output, the voltage signal conditioning detects and sample circuit; The collection of welding machine wire feed rate and given voltage and initialization circuit; Interface and parameter display circuit with external keyboard; The telecommunication circuit that is connected with PC;
Said craft is fallen idler circuit and is comprised that rectifier circuit, filtering, voltage stabilizing and optocoupler are input to the capture function pin of DSP, the signal circuit of the unloaded output voltage of DSP output control welding machine or the relay of fully loaded output voltage; Said current and voltage signals conditioning comprises with sample circuit: the Hall voltage sensor and the Hall current sensor that detects the welding machine output current that are used to detect welding machine output feedback arc voltage; Take corresponding current/voltage modulate circuit to carry out amplitude limit; After overvoltage sensor SEN1 carries out isolation detection, after resistance capacitance filtering, carry out follow-up amplifier through operational amplifier U1, sampled voltage UFO amplitude limit is received again the analog input port ADCINO of DSP in the 0-3.3V scope; Feedback current signal for the Hall current sensor detection; The add circuit that process rc filter circuit and amplifier are carried out signal condition and be made up of amplifier U4 is limited in the analog input pin ADCIN1 that receives DSP in the 0-3.3V scope again through amplifying and following with sample rate current IFO again;
Sample circuit comprises that given voltage and the given electric current on the wire-feed motor panel is the Acquisition Circuit of wire feed speed, and given current/voltage value meets analog input port ADCIN3 and the ADCIN4 of DSP too after regulating amplification through amplifier; According to the current/voltage on the collection wire-feed motor,,, export the given and voltage given signal of corresponding wire feed rate through amplifying after the resistance capacitance filtering and through homophase through the task manager module generation two-way pwm signal of DSP;
Said CPLD or FPGA phase-shift soft switch control circuit are made up of DSP1 and CPLD or FPGA: feedback current IFO; Feedback voltage UFO and given electric current I G; Given voltage U G divides four the tunnel to be sent to AD in the sheet of DSP, and the data after gathering through AD realize the electric current and voltage closed-loop control in DSP; The incident management register of DSP is exported the pwm signal of effective pulsewidth; Again pwm signal is met CPLD or FPGA, four road PWM ripples of CPLD or FPGA output are as the soft switch circuit of the driving signal of exporting with realization IGBT; The data-interface of DSP and CPLD or FPGA connects external memory interface.
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| CN2011203751201U CN202344104U (en) | 2011-09-29 | 2011-09-29 | Multifunctional digital welding machine |
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| CN2011203751201U CN202344104U (en) | 2011-09-29 | 2011-09-29 | Multifunctional digital welding machine |
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| CN102350569A (en) * | 2011-09-29 | 2012-02-15 | 熊猫电子集团有限公司 | Multifunctional digitized welding machine |
| CN102790545A (en) * | 2012-08-01 | 2012-11-21 | 西安思坦仪器股份有限公司 | Method for realizing bipolar power supply of logging instrument and power supply system for logging instrument |
| CN102922091A (en) * | 2012-11-26 | 2013-02-13 | 甘肃西柴动力机电制造有限公司 | Digitally-controlled multifunctional inverted arc welding machine |
| CN103028870A (en) * | 2012-12-11 | 2013-04-10 | 南京熊猫电子股份有限公司 | Welding robot system |
| CN103817402A (en) * | 2012-11-18 | 2014-05-28 | 盐城鼎力达焊接科技有限公司 | Multifunctional high-frequency inversion direct-current electric welding machine realizing circuit |
| CN104439621A (en) * | 2014-11-05 | 2015-03-25 | 深圳华意隆电气股份有限公司 | Refined multifunctional welding system and control method thereof |
| CN104703742A (en) * | 2012-07-27 | 2015-06-10 | 伊利诺斯工具制品有限公司 | Power converter for engine generator with an insulating support supporting a rectifier, plate like dc bus and power converter circuit |
| CN105101600A (en) * | 2014-05-23 | 2015-11-25 | 武汉天和技术股份有限公司 | Plasma operation control system |
| CN105598558A (en) * | 2016-03-10 | 2016-05-25 | 大连理工大学 | Arc welding power source current double-closed-loop control method |
| CN105880800A (en) * | 2014-05-13 | 2016-08-24 | 李书进 | Electric welding machine general circuit board design method |
| CN106443359A (en) * | 2016-11-11 | 2017-02-22 | 南京工程学院 | Short-distance cable fault ranging system and ranging method with low-voltage pulse method |
| CN106862731A (en) * | 2017-02-21 | 2017-06-20 | 上海通用重工集团有限公司 | DC pulse tig welding machine |
| CN109116790A (en) * | 2018-10-31 | 2019-01-01 | 徐波 | A kind of electric arc spraying electromechanical source integrated control system |
| CN109262116A (en) * | 2017-07-17 | 2019-01-25 | 浙江颐顿机电有限公司 | A kind of Multifunctional digitized welding machine system |
| CN110026654A (en) * | 2019-04-26 | 2019-07-19 | 吴忠市黄河电焊机有限公司 | A kind of anti-interference good digital source of welding current of wide scope input |
| CN110744173A (en) * | 2018-07-23 | 2020-02-04 | 深圳市鸿栢科技实业有限公司 | Pulse MIG welding power supply |
| CN115091018A (en) * | 2022-06-27 | 2022-09-23 | 广东阿达智能装备有限公司 | Integrated driving system and method for wire bonding machine |
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2011
- 2011-09-29 CN CN2011203751201U patent/CN202344104U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102350569A (en) * | 2011-09-29 | 2012-02-15 | 熊猫电子集团有限公司 | Multifunctional digitized welding machine |
| CN102350569B (en) * | 2011-09-29 | 2014-02-19 | 熊猫电子集团有限公司 | Setting method of multifunctional digitized welding machine |
| CN104703742B (en) * | 2012-07-27 | 2016-11-23 | 伊利诺斯工具制品有限公司 | There is the electric power converter for engine models electromotor of dielectric support for supporting commutator, tabular dc bus and power conversion circuit |
| CN104703742A (en) * | 2012-07-27 | 2015-06-10 | 伊利诺斯工具制品有限公司 | Power converter for engine generator with an insulating support supporting a rectifier, plate like dc bus and power converter circuit |
| CN102790545A (en) * | 2012-08-01 | 2012-11-21 | 西安思坦仪器股份有限公司 | Method for realizing bipolar power supply of logging instrument and power supply system for logging instrument |
| CN103817402A (en) * | 2012-11-18 | 2014-05-28 | 盐城鼎力达焊接科技有限公司 | Multifunctional high-frequency inversion direct-current electric welding machine realizing circuit |
| CN102922091A (en) * | 2012-11-26 | 2013-02-13 | 甘肃西柴动力机电制造有限公司 | Digitally-controlled multifunctional inverted arc welding machine |
| CN103028870A (en) * | 2012-12-11 | 2013-04-10 | 南京熊猫电子股份有限公司 | Welding robot system |
| CN105880800A (en) * | 2014-05-13 | 2016-08-24 | 李书进 | Electric welding machine general circuit board design method |
| CN105880800B (en) * | 2014-05-13 | 2020-04-14 | 广东联洋科技有限公司 | Design method of universal circuit board of electric welding machine |
| CN105101600A (en) * | 2014-05-23 | 2015-11-25 | 武汉天和技术股份有限公司 | Plasma operation control system |
| CN104439621B (en) * | 2014-11-05 | 2016-08-31 | 深圳华意隆电气股份有限公司 | One becomes more meticulous Multifunctional welding welding system and control method thereof |
| CN104439621A (en) * | 2014-11-05 | 2015-03-25 | 深圳华意隆电气股份有限公司 | Refined multifunctional welding system and control method thereof |
| CN105598558A (en) * | 2016-03-10 | 2016-05-25 | 大连理工大学 | Arc welding power source current double-closed-loop control method |
| CN106443359A (en) * | 2016-11-11 | 2017-02-22 | 南京工程学院 | Short-distance cable fault ranging system and ranging method with low-voltage pulse method |
| CN106443359B (en) * | 2016-11-11 | 2021-08-03 | 南京工程学院 | Short-distance cable fault distance measurement system and method based on low-voltage pulse method |
| CN106862731A (en) * | 2017-02-21 | 2017-06-20 | 上海通用重工集团有限公司 | DC pulse tig welding machine |
| CN106862731B (en) * | 2017-02-21 | 2021-06-25 | 上海通用重工集团有限公司 | DC pulse argon arc welding machine |
| CN109262116A (en) * | 2017-07-17 | 2019-01-25 | 浙江颐顿机电有限公司 | A kind of Multifunctional digitized welding machine system |
| CN110744173A (en) * | 2018-07-23 | 2020-02-04 | 深圳市鸿栢科技实业有限公司 | Pulse MIG welding power supply |
| CN109116790A (en) * | 2018-10-31 | 2019-01-01 | 徐波 | A kind of electric arc spraying electromechanical source integrated control system |
| CN110026654A (en) * | 2019-04-26 | 2019-07-19 | 吴忠市黄河电焊机有限公司 | A kind of anti-interference good digital source of welding current of wide scope input |
| CN115091018A (en) * | 2022-06-27 | 2022-09-23 | 广东阿达智能装备有限公司 | Integrated driving system and method for wire bonding machine |
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Granted publication date: 20120725 Termination date: 20130929 |