CN101856767A - Arc welding inverter control system and method based on thyristor module - Google Patents
Arc welding inverter control system and method based on thyristor module Download PDFInfo
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- CN101856767A CN101856767A CN200910048944A CN200910048944A CN101856767A CN 101856767 A CN101856767 A CN 101856767A CN 200910048944 A CN200910048944 A CN 200910048944A CN 200910048944 A CN200910048944 A CN 200910048944A CN 101856767 A CN101856767 A CN 101856767A
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Abstract
The invention discloses arc welding inverter control system and method based on a thyristor module. The system comprises a rectifying, inverting and filtering module, an IGBT (Insulated Gate Bipolar Transistor) grid driving module, a thyristor processing module, an input and output module, a sensing and amplifying module and an overload signal sensing module. The method comprises the following steps of: closing a total interrupt and a watchdog; setting a register; initializing a digital-analog conversion unit in the thyristor processing module; setting a full-comparison resister and a dead zone control register; configuring an I/O pin; setting a timer to permit underflow, periodical interruption and underflow interruption; setting EVAIMRA and IMR (Interrupt Mask Register) to permit INT1 and INT2 interrupts; clearing an interrupt mark; opening the total interrupt; and entering a circular waiting state. By applying a thyristor module technology to control the arc welding inverter system, the invention can provide more stable, accurate and flexible performance, flexible and intelligent control, simple hardware design, flexible and various software designs, less peripheral circuits and wide application prospects.
Description
Technical field
The present invention relates to a kind of arc welding inversion control technology, relate in particular to a kind of arc welding inverter control system and method thereof based on thyristor module.
Background technology
Arc welding inverter is made up of inverter main circuit and control system thereof.Inversion transformation technique reaches its maturity in recent years, and its control system is still based on Single-chip Controlling.Digitlization has become the development trend and the trend of electronic information technology, and under the promotion of this trend and trend, theory of digital signal processing and realization means have obtained unprecedented development, becomes one of subject current with fastest developing speed.And thyristor module since being born beginning of the eighties late 1970s, still price on has all been obtained breakthrough development on the performance as the main method and the means of Digital Signal Processing, and conventional one-piece machine control system is constituted severe challenge.Along with the more complicated application of arc welding inverter and the raising of performance requirement, the single-chip microcomputer arithmetic speed is slow, the shortcoming of poor anti jamming capability, programming very flexible is obvious all the more, becomes the bottleneck of restriction arc welding inverter development.
Simultaneously, in thyristor module, the welding machine special rectifier module that Japan produces is occupied critical role on the market at home and abroad with its superior ratio of performance to price, the new control thyristor module TMS320LF2407A that releases of the said firm, the sheet peripheral devices of a high performance thyristor module kernel and microprocessor is integrated into a chip, become the substitute products of a kind of cheapness of traditional microcontroller (MCU) and expensive control multi-disc design, can be rated as the digital controller of the tool competitiveness of industry.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, arc welding inverter control system and method thereof that defencive function is complete based on thyristor module.
To achieve the above object, arc welding inverter control system and the method thereof based on thyristor module of the present invention is as follows:
Should be based on the arc welding inverter control system of thyristor module, its main feature is, described control system comprises commutation inversion filter function module, IGBT grid electrode drive module, IGCT processing module, input/output module, sensing amplification module, overload signal detecting module, described IGCT processing module is connected with described input/output module, sensing amplification module, overload signal detecting module respectively, and this IGCT processing module also is connected with described commutation inversion filter function module by described IGBT grid electrode drive module.
Should comprise rectification filtering unit, inverter functional unit, output filter function unit based on the commutation inversion filter function module in the arc welding inverter control system of thyristor module, described rectification filtering unit is connected with described sensing amplification module by inverter functional unit, output filter function unit successively, and described inverter functional unit is connected with described IGBT grid electrode drive module.
Should comprise host computer unit, key board unit and display unit based on the input/output module in the arc welding inverter control system of thyristor module, described key board unit is connected with described IGCT processing module by the host computer unit respectively with display unit.
Should be overvoltage, under-voltage, overcurrent, overheated detecting module based on the overload signal detecting module in the arc welding inverter control system of thyristor module.
Should be the TMS320LF2407A chip based on the IGCT processing module in the arc welding inverter control system of thyristor module.
This utilizes above-mentioned system to realize the method for arc welding inversion control, and its main feature is that described method may further comprise the steps:
(1) system carries out initialization operation;
(2) system closing always interrupts;
(3) system closing house dog;
(4) system carries out the register setting;
(5) D/A conversion unit in the system initialization IGCT processing module;
(6) system carries out full comparand register setting;
(7) system carries out dead band control register setting;
(8) system carries out I/O pin configuration;
(9) system is provided with timer, allows underflow and cycle interruption, underflow to interrupt;
(10) system is provided with EVAIMRA;
(11) system is provided with IMR, and allows INT1 and INT2 to interrupt;
(12) all interrupt identifications of System Cleaning;
(13) open system always interrupts;
(14) system enters the circular wait state.
In sum, the control that the thyristor module technology is applied to the arc welding inverter system based on the arc welding inverter control system and the method thereof of thyristor module of the present invention, can provide more stable, accurately, performance flexibly, also flexibility more of control, intelligent, hardware design is simple, flexible software design is various, required peripheral circuit seldom, thereby for the control of arc welding inverter provides more wide development space, be with a wide range of applications.
Description of drawings
Arc welding inverter control system and method thereof based on thyristor module of the present invention provided by following embodiment and accompanying drawing.
Fig. 1 is the hardware capability principle schematic of the arc welding inverter control system based on thyristor module of the present invention.
Fig. 2 is the overall flow figure of the arc welding inversion controlling method based on thyristor module of the present invention.
The specific embodiment
Below will be described in further detail arc welding inverter control system and the method thereof based on thyristor module of the present invention.
See also shown in Figure 1, should be based on the arc welding inverter control system of thyristor module, wherein, described control system comprises commutation inversion filter function module, IGBT grid electrode drive module, IGCT processing module, input/output module, sensing amplification module, overload signal detecting module, described IGCT processing module is connected with described input/output module, sensing amplification module, overload signal detecting module respectively, and this IGCT processing module also is connected with described commutation inversion filter function module by described IGBT grid electrode drive module.
Wherein, described commutation inversion filter function module comprises rectification filtering unit, inverter functional unit, output filter function unit, described rectification filtering unit is connected with affiliated sensing amplification module by inverter functional unit, output filter function unit according to this, and described inverter functional unit is connected with described IGBT grid electrode drive module; Described input/output module comprises host computer unit, key board unit and display unit, and described key board unit is connected with described IGCT processing module by the host computer unit respectively with display unit; Described overload signal detecting module is overvoltage, under-voltage, overcurrent, overheated detecting module; Described IGCT processing module is the TMS320LF2407A chip.
See also shown in Figure 2ly again, this utilizes above-mentioned system to realize the method for arc welding inversion control, and its main feature is that described method may further comprise the steps:
(1) system carries out initialization operation;
(2) system closing always interrupts;
(3) system closing house dog;
(4) system carries out the register setting;
(5) D/A conversion unit in the system initialization IGCT processing module;
(6) system carries out full comparand register setting;
(7) system carries out dead band control register setting;
(8) system carries out I/O pin configuration;
(9) system is provided with timer, allows underflow and cycle interruption, underflow to interrupt;
(10) system is provided with EVAIMRA;
(11) system is provided with IMR, and allows INT1 and INT2 to interrupt;
(12) all interrupt identifications of System Cleaning;
(13) open system always interrupts;
(14) system enters the circular wait state.
In the middle of reality was used, TMS320LF2407A was a kind of microprocessor of specific use, and its structure and instruction set are particularly suitable for carrying out " signal processing " class algorithm, and abundant sheet peripheral devices makes it be suitable for control again and uses.According to the TMS320LF2407A architecture, the design feature of thyristor module is particularly conducive in control system to be used, and mainly shows as:
(1) structure is stroked in improved Kazakhstan.Program and data/address bus with separation, this multiple bus architecture allows instruction fetch simultaneously and operand, makes instruction and data to walk abreast and moves and carry out synchronously, has accelerated execution speed.
(2) pile line operation.Pile line operation can overlappingly be carried out operations such as getting finger, decoding, fetch operand and execution.Pile line operation has determined that the instruction of thyristor module all is one-cycle instruction basically.
(3) adopt hardware multiplier.The hardware multiplier of thyristor module makes multiplying to finish in 1 instruction cycle, and the multiplying order of single-chip microcomputer is actually by addition and displacement and realizes with software mode, therefore, realizes that multiplying is just slow.
(4) the rapid instruction cycle.The working clock frequency of thyristor module is very high, and the clock frequency of TMS320LF2407A reaches 40MHz, and promptly the instruction cycle is 25ns, and operational capability is 40MIPS (million instructions per second).
(5) special thyristor module instructs.A key character of thyristor module is exactly the instruction system that 1 cover designs for Digital Signal Processing specially.The instruction set of thyristor module has been simplified digital signal processing.
(6) event manager module of You Huaing and peripheral circuit.Integrated A/D conversion, mass storage, timer, comparing unit, capturing unit, PWM waveform generator, digital I/O mouth, SPI in the TMS320LF2407A chip, SCI, CAN etc., wherein the binding energy of 4 general purpose timers and 12 comparing units produces nearly 16 tunnel PWM output, is enough to satisfy the driving of IGBT main circuit.
In addition, TMS320LF2407A has the distinctive performances such as backward addressing function, hardware addressing control and multiple energy-saving mode of interrupt handling capacity, data pointer fast, and these characteristics will help the application of TMS320LF2407A in arc welding inverter control.
Simultaneously, for voltage, current feedback computing, output voltage, electric current are sent into ADC1 and ADC2 passage after sampling, conversion, finish the sampling of feedback voltage, electric current and the computing of feedback current with interruption of timer 1 underflow and cycle interruption, interrupt finishing the computing of feedback voltage with the timer 2 underflow, 2 timers all are operated in continuously and increase/subtract count mode.
For the implementation method of this control system, mainly comprise the design of main program and interrupt service subroutine, program adopts modularization programming, has very strong transplantability.
The task of main program mainly is a system initialization, initialization module is mainly finished the setting of each control register of system clock, house dog, I/O port, system break, event manager module and interruption thereof etc., and in the software initialization of each variable and background register function is set etc.
In the design of interrupt service subroutine, interrupt service routine comprises that mainly feedback computing, the generation of PWM waveform, the power of voltage, electric current drives the realization etc. of protection.In the interrupt service subroutine design, the processing of interrupt flag bit is a very important problem.Because TMS320LF2407A has adopted a plurality of interrupt sources to share same interrupt priority level in the thyristor module kernel, thereby all has 2 interrupt identifications to identify to the interrupt requests that each interrupt source is sent.Comprised the flag bit that has been sent to the maskable interrupts request of CPU in INTI～INT6 interrupt class in the interrupt flag register (IFR), each interrupt source of sharing certain interrupt class all has the interrupt flag bit of oneself in the control corresponding register.When entering the general interrupts service routine, only there is the IFR position to be removed automatically, flag bit in the corresponding control register can not removed automatically, at this moment must be removed (all being to write 1 to remove this sign to this position usually) with software in specific interrupt service subroutine.If do not remove this sign, when certain interrupt source (being designated as interrupt source A) of sharing the same interrupt class of kernel is sent interrupt requests, when this interrupt requests of program response enters the general interrupts service routine, if the priority of interrupt source A is lower than the interrupt source that flag bit is not eliminated, program can enter wrong interrupt service subroutine according to flag bit, so must be removed the flag bit in the corresponding control register before interruption is returned.
Because TMS320LF2407A has adopted a plurality of interrupt sources to share this interrupt mode of the same interrupt class of kernel, more interrupt source not only is provided, and make the user can handle the interrupt requests of various interrupt sources (as timer underflow, serial ports reception, external pin saltus step etc.) easily, write out the control program that is fit to oneself needs.
In sum, the control that above-mentioned arc welding inverter control system and method thereof based on thyristor module is applied to the thyristor module technology arc welding inverter system, can provide more stable, accurately, performance flexibly, also flexibility more of control, intelligent, hardware design is simple, flexible software design is various, required peripheral circuit seldom, thereby for the control of arc welding inverter provides more wide development space, be with a wide range of applications.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (6)
1. arc welding inverter control system based on thyristor module, it is characterized in that, described control system comprises commutation inversion filter function module, IGBT grid electrode drive module, IGCT processing module, input/output module, sensing amplification module, overload signal detecting module, described IGCT processing module is connected with described input/output module, sensing amplification module, overload signal detecting module respectively, and this IGCT processing module also is connected with described commutation inversion filter function module by described IGBT grid electrode drive module.
2. the arc welding inverter control system based on thyristor module according to claim 1, it is characterized in that, described commutation inversion filter function module comprises rectification filtering unit, inverter functional unit, output filter function unit, described rectification filtering unit is connected with described sensing amplification module by inverter functional unit, output filter function unit successively, and described inverter functional unit is connected with described IGBT grid electrode drive module.
3. the arc welding inverter control system based on thyristor module according to claim 1, it is characterized in that, described input/output module comprises host computer unit, key board unit and display unit, and described key board unit is connected with described IGCT processing module by the host computer unit respectively with display unit.
4. the arc welding inverter control system based on thyristor module according to claim 1 is characterized in that, described overload signal detecting module is overvoltage, under-voltage, overcurrent, overheated detecting module.
5. the arc welding inverter control system based on thyristor module according to claim 1 is characterized in that, described IGCT processing module is the TMS320LF2407A chip.
6. one kind is utilized the described system of claim 1 to realize the method that arc welding inversion is controlled, and it is characterized in that described method may further comprise the steps:
(1) system carries out initialization operation;
(2) system closing always interrupts;
(3) system closing house dog;
(4) system carries out the register setting;
(5) D/A conversion unit in the system initialization IGCT processing module;
(6) system carries out full comparand register setting;
(7) system carries out dead band control register setting;
(8) system carries out I/O pin configuration;
(9) system is provided with timer, allows underflow and cycle interruption, underflow to interrupt;
(10) system is provided with EVAIMRA;
(11) system is provided with IMR, and allows INT1 and INT2 to interrupt;
(12) all interrupt identifications of System Cleaning;
(13) open system always interrupts;
(14) system enters the circular wait state.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926455A (en) * | 2013-01-10 | 2014-07-16 | 中兴通讯股份有限公司 | Method and apparatus for identification of DC input voltage transient speed |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103926455A (en) * | 2013-01-10 | 2014-07-16 | 中兴通讯股份有限公司 | Method and apparatus for identification of DC input voltage transient speed |
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Application publication date: 20101013 |