A kind of modularization intelligent welding power source system and realization welding power source system connecting method
Technical field
The present invention relates to source of welding current technical field, relate in particular to a kind of modularization intelligent welding power source system and realize the welding power source system connecting method.
Background technology
China is not only shipbuilding the biggest in the world and maximum automobile consumption state, also is simultaneously maximum bullet train manufacturing nation, and so long as metal connects occasion, will uses the source of welding current.With regard to Guangdong Province, all none can connect power supply from snapping for its equipment manufacture, pipeline industry, shipbuilding industry, car industry etc.
But at present domestic source of welding current function singleness of selling on the market, network communicating function a little less than, can not realize high-power output in the mode of Collaborative Control by multi-machine parallel connection.Homemade high power welding power supply is the high-power welding machine of central controlled tradition, and the power supply design needs to adopt high power module, and heat dissipation design is difficulty relatively.
Welding efficiency and the quality of more domestic in addition large enterprises in order to improve important component begins efficiently to be welded automatically fully from external introduction mariages, mainly is filament mariages automatic soldering technique and equipment.But for the welding of thick macrostructure spare, the filament double wire welding still is difficult to further speed-raising, and reason is the welding current restriction.
Summary of the invention
The object of the present invention is to provide a kind of modularization intelligent welding power source system and realize the welding power source system connecting method, this welding power source system adopts digital, soft switch and modular design mode, both can guarantee the multi-functional of separate unit power supply, realize a tractor serves several purposes, simultaneously during high-power and mariages high-speed welding, can realize multi-machine parallel connection and Collaborative Control by the CAN bus communication function of power supply again at needs.
The embodiment of the invention is to realize like this, a kind of modularization intelligent welding power source system, comprise: the main circuit of Xiang Lianing, DSP power supply master control borad and ARM human-machine interface oralia successively, reach IGBT driving circuit, CAN bus, described IGBT driving circuit links to each other with DSP power supply master control borad with main circuit respectively, and described CAN bus links to each other with described DSP power supply master control borad.
Wherein, described main circuit is connected to form successively by input rectifying module, input filtration module, soft-switching inversion module, high-frequency transformer, output rectification module and output filtration module, described input rectifying module is connected with three-phase alternating-current supply, and described output filtration module connects load.
Wherein, described DSP power supply master control borad comprises: DSP basic circuit, primary current sample circuit, output current/voltage sampling circuit, signal conditioning circuit, PWM output module, CAN bus interface circuit and RS485 interface circuit, described CAN bus interface circuit connects the CAN bus.
Wherein, described ARM human-machine interface oralia comprises: ARM basic circuit, LCD and keyboard interface circuit and RS485 interface circuit, described ARM human-machine interface oralia is connected through the RS485 interface circuit with DSP power supply master control borad.
Wherein, described IGBT driving circuit comprises: the 4 tunnel isolate+driving circuit that 24V direct supply, 4 route optocouplers are formed, an end of described IGBT driving circuit links to each other with described PWM output module, the other end links to each other with described soft-switching inversion module.
Wherein, with replaceable described LCD of touch screen interface circuit and keyboard interface circuit.
The described welding power source system connecting method of a kind of realization carries out online according to the high-power output mode of multimachine, filament mariages pattern or crin mariages pattern many welding power source systems by described CAN bus.
Wherein, the high-power output mode of described multimachine is: anodal linking to each other as the positive pole of the source of welding current, negative pole links to each other as source of welding current negative pole, specify a source of welding current as main frame, all the other sources of welding current are as slave, in the enterprising line parameter setting of main frame, the open and close of the slave source of welding current send to slave by host computer control by the CAN bus.
Wherein, described filament mariages pattern is: respectively as the host power supply and the slave power supply of double wire welding, in the enterprising line parameter setting of main frame, parameter sets up the back and sends to slave by the CAN bus with two sources of welding current.
Wherein, described crin mariages pattern is: many power-supply systems adopt the mode of N+N (N 〉=2) to realize the welding of crin mariages by CAN bus Collaborative Control, in this pattern, the positive pole of N platform power-supply system links to each other, negative pole links to each other, host power supply as double wire welding, the positive pole of other N platform power-supply system links to each other, minus earth, slave power supply as double wire welding, the setting of all source of welding current output parameters is finished by a main frame welding power source system, and sends to other welding power source system by the CAN bus.
The embodiment of the invention compared with prior art, beneficial effect is:
The present invention adopts DSP and ARM twin-core sheet control circuit, has realized multiple welding manner on a power-supply system;
The present invention programmes by digitizing, realizes different external characteristics outputs under the situation that does not change the power supply hardware circuit, thereby satisfies different welding method technological requirements;
The present invention has realized large power supply output easily by the on-line working of many power-supply systems;
The present invention has realized filament double wire welding and crin double wire welding, particularly by many power-supply systems of CAN bussing technique Collaborative Control, has realized the crin mariages high-speed welding of 2+2 or N+N.
Description of drawings
Fig. 1 is the digital intelligent welding power source system block scheme of modularization of the present invention;
Fig. 2 is the block diagram of system of the high-power output multimachine of the present invention pattern;
Fig. 3 a, Fig. 3 b are principal and subordinate's machine DSP control flow charts of the high-power output multimachine of the present invention bond pattern, and wherein Fig. 3 a is a main frame DSP control flow chart, and Fig. 3 b is a main frame DSP control flow chart;
Fig. 4 is the block diagram of system of filament double wire welding pattern of the present invention;
Fig. 5 a, Fig. 5 b are principal and subordinate's machine DSP control flow charts of filament double wire welding pattern of the present invention, and wherein Fig. 5 a is a main frame DSP control flow chart, and Fig. 5 b is a main frame DSP control flow chart;
Fig. 6 is the block diagram of system of crin mariages high-speed welding pattern of the present invention;
Fig. 7 a-Fig. 7 c is the principal and subordinate machine DSP control flow chart of the present invention as crin mariages pattern high-speed welding pattern, wherein Fig. 7 a is the DSP control flow chart of the power supply A of crin mariages pattern, the DSP control flow chart of the power supply A1 of Fig. 7 b crin mariages pattern, the DSP control flow chart of the power supply B1/B2 of Fig. 7 c crin mariages pattern.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, the digital intelligent welding power source system of modularization comprises the CAN bus 105 5 parts composition of main circuit 101, DSP power supply master control borad 102, ARM human-machine interface oralia 103, IGBT drive plate 104 and the online co-ordination of realization multimachine.Main circuit is connected to form successively by input rectifying module, input filtration module, soft-switching inversion module, high-frequency transformer, output rectification module and output filtration module, and the input rectifying module is connected with three-phase alternating-current supply, and the output filtration module is connected with load; Power supply master control borad based on DSP mainly comprises DSP basic circuit, primary current sample circuit, output current/voltage sampling circuit, I/O interface circuit, holding circuit, CAN bus interface circuit, RS485 interface circuit etc.; Human-machine interface oralia based on ARM mainly comprises ARM basic circuit, LCD and keyboard interface circuit (or touch screen interface circuit), RS485 interface circuit, RS232 interface circuit etc.; The IGBT driving circuit mainly comprises the driving circuit that 4 tunnel isolation+24V direct supply, 4 route optocoupler TLP250 form etc.; Adopt the serial communication of RS485 agreement between described DSP power supply master control borad and the ARM human-machine interface oralia, dsp chip adopts the TMS320LF2812 of TI company, and the ARM chip adopts the LPC2119 of PHILIPS Co..
Principle of work:
The primary current sample circuit is delivered to the DSP master control borad by mutual inductor (or current Hall sensor) with high-frequency transformer primary current detection signal, delivers to the ADC pin of dsp chip through the signal conditioning circuit of DSP master control borad; Output current/voltage sampling circuit is gathered welding machine output current/voltage signal by the current/voltage Hall element and is sent DSP master control borad, delivers to the ADC pin of dsp chip through the signal conditioning circuit of DSP master control borad; Dsp chip is according to electric current, voltage signal and the welding machine setting of gathering, finish the corresponding closed-loop control algolithm, produce the phase-shift PWM waveform, the dutycycle of the IGBT power model in IGBT driving circuit control soft-switching inversion main circuit, and finally realize desired generator characteristic output.Under the situation of many power supply collaborative works, the DSP master control borad can communicate by its CAN bus communication interface and other power supplys, to realize the Collaborative Control of total system.Wherein, transplant μ C/OS-II embedded OS in the ARM chip, realized friendly more man-machine interface; Described dsp chip adopts the high-speed digital signal process chip that is integrated with the CAN communication interface modules, as the TMS320LF2812 of TI company; Described ARM chip adopts 32 ARM chips low in energy consumption of affluent resources such as integrated CAN, RS232, ADC, GPIO, as the LPC2119 of PHILIPS Co..
ARM man-machine interface control panel has LCD display interface and keyboard interface circuit (or touch screen interface circuit), can realize the man-machine communication, and realize and the communicating by letter of DSP master control borad by the RS485 communication interface, the setting of welding machine parameter is sent to the DSP master control borad, and receive the real-time welding parameter value that the DSP master control borad sends, and on liquid crystal display, show.
Shown in Fig. 2, Fig. 3 a, Fig. 3 b, in order to realize the high-power output of multimachine, the output connected mode of many power-supply systems is: anodal linking to each other as the positive pole of the source of welding current, negative pole links to each other as source of welding current negative pole; Coordinate control in order to realize multimachine, only need as main frame power-supply system A, power-supply system A1, A2 etc. are as slave, in the enterprising line parameter setting of power-supply system A, parameter sets up the back and sends to A1, A2 etc. by the CAN bus, and the open and close of all power-supply systems all send to slave by host computer control by the CAN bus.
Shown in Fig. 4, Fig. 5 a, Fig. 5 b, in order to realize the filament double wire welding, respectively with two power-supply systems as the primary power of double wire welding with from power supply, in the enterprising line parameter setting of main frame, parameter set up the back send to slave by the CAN bus.
As shown in Figure 6, in order to realize the high-speed welding of crin mariages, the output connected mode of many power supplys is: the positive pole of power supply A and A1 is linked to each other, negative pole links to each other, host power supply as crin mariages high-speed welding, the positive pole of power-supply system B1 and B2 is linked to each other, and negative pole links to each other, as the slave power supply of crin mariages high-speed welding; For realizing multimachine coordination control, only need the main frame as operation control with power supply A, other power supply is the slave of conduct operation control all, and in the enterprising line parameter setting of main frame, parameter sets up the back and sends to other slaves by the CAN bus.
Fig. 7 a, Fig. 7 b, Fig. 7 c have provided the crin Double Wire Welding system chart be made up of the 2+2 mode and the DSP control flow chart of each power supply.As seen from the figure, when on power supply A, pressing start button as main frame, main frame is notified other slaves by the CAN bus immediately, all power-supply systems enter normal welding control simultaneously, be peak point current as the power supply A/A1 of Double Wire Welding primary power output this moment, and power supply B1/B2 then exports background current; After the peak value of power supply A/A1 finished, power supply A sent switching signal to power supply B1/B2, and after this power supply A/A1 enters the background current control stage, and power supply B1/B2 then enters the peak point current control stage; Power supply A/A1 the background current time to after transfer the peak point current control stage automatically to, power supply B1/B2 peak current time to after transfer the base value stage automatically to; Power supply A/A1 sends switching signal by power supply A to power supply B1/B2 again after the peak point current control time arrives, make power supply B1/B2 transfer peak phase to by the base value stage again.So circulate, both guaranteed the signal Synchronization of primary power one side (power supply A/A1), guaranteed that again power supply and the power pulse output phase from power supply on the primary power differs 180 °.After welding finished, main frame sent stop signal to other power supplys, and total system stops output after receiving stop signal.
The welding manner that has proposed to realize the crin mariages first of the present invention in multimode Collaborative Control mode, compare with single arc welding technology, it is a kind of high efficiency welding manner that the crin Double Wire Welding is done, because two electric arcs burn on a molten bath jointly, not only improve total sweating heat input, and changed the characteristics of heat distribution, when carrying out High Speed Welding, can effectively avoid number of drawbacks such as undercut, speed of welding and production efficiency can be improved greatly, and high-quality weldquality attractive in appearance can be obtained.Simultaneously, compare with the filament Double Wire Welding, because system's output power is bigger, deposition efficiency is higher, is particularly suitable for the high-speed welding of thick macrostructure spare, as: shipbuilding, welded tube, boiler etc.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.