CN202224811U - High-frequency stud welder with two transformers - Google Patents
High-frequency stud welder with two transformers Download PDFInfo
- Publication number
- CN202224811U CN202224811U CN2011203118007U CN201120311800U CN202224811U CN 202224811 U CN202224811 U CN 202224811U CN 2011203118007 U CN2011203118007 U CN 2011203118007U CN 201120311800 U CN201120311800 U CN 201120311800U CN 202224811 U CN202224811 U CN 202224811U
- Authority
- CN
- China
- Prior art keywords
- bridge
- high frequency
- circuit
- frequency
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to a full-digital high-frequency high-power stud welder. The stud welder comprises a three-phase rectifying main circuit, and is characterized in that the three-phase rectifying main circuit comprises a three-phase rectifying filter circuit, two high frequency inversion circuits I and II connected in parallel and an output filter and bypass circuit., wherein the high frequency inversion circuit I comprises an IGBT (Insulated Gate Bipolar Translator) bridge switch I, a high frequency transformer I and a rectifying filter I; and the high frequency inversion circuit II comprises an IGBT bridge switch II, a high frequency transformer II and a rectifying filter II. Compared with a single inversion circuit, the stud welder provided by the utility model adopts double high frequency inversion circuits in parallel to realize output of higher power. Full digital control on the inversion circuits can be realized by adopting a DSP (Digital Signal Processor) control chip with a real time CPLD (Complex Programmable Logic Device) and IGBT driving board so as to monitor and protect the voltage, the current and the temperature of the inversion circuits in real time.
Description
Technical field
The utility model relates to a kind of welding equipment, relates in particular to a kind of digital high-frequency high-power inversion stud welder.
Background technology
The equipment that is applied to the peg welding at present has two kinds: a kind of is to have the thyristor controlled big transformer electric arc nail solder of power frequency to meet sb. at the airport; Its welding current is at 600-3150A; Bonding power is between 200-300KW; Big because of a little energy-conservation aspect losses, efficient is low relatively, and volume show huge, heavy, move and use all inconvenient.
Another kind is the welding machine of inversion, mainly adopts the PWM modulation chip, adopts single high-frequency inverter circuit and high frequency transformer inversion; Its advantage is energy-conservation, in light weight conveniently moving; Main deficiency is that power output is limited, is difficult to be applied to the welding of major diameter peg, and welding quality is difficult to ensure.Digitized stud welder is arranged in the market, but exhausted majority is digitized management but not digitized inversion control.
The utility model content
In order to solve the technical problem that exists in the present technology: the welding machine single-machine capacity of inversion is little, can't satisfy major diameter peg welding needs.The utility model provides a kind of power output big, and volume is little, lightweight stud welder.
The technical scheme that the utility model solves the problems of the technologies described above is:
A kind of stud welder; Comprise the three phase rectifier main circuit; Described three phase rectifier main circuit comprises high-frequency inverter circuit one and high-frequency inverter circuit two and the output filtering and the bypass circuit of three phase rectifier filter circuit, two parallel connections; Described high-frequency inverter circuit one comprises IGBT bridge switch one, high frequency transformer one and rectifying and wave-filtering one, and described high-frequency inverter circuit two comprises IGBT bridge switch two, high frequency transformer two and rectifying and wave-filtering two;
Wherein, Said three phase rectifier filter circuit divides two-way to get into described two high-frequency inverter circuits after three-phase alternating current is transformed into direct current; Described two high-frequency inverter circuits convert direct current to high-frequency alternating current; Alternating current merges behind IGBT bridge switch, high frequency transformer, rectifying and wave-filtering respectively through output filtering and bypass circuit generation pulsating direct current welding current, by the output of welding output again.
Above-described dual transformer high frequency stud welder; Described three phase rectifier main circuit also further includes electromagnetic compatibility circuit and soft starting circuit; Described electromagnetic compatibility circuit advances electricity with three-phase and gets into the three phase rectifier filter circuit through High-frequency Interference, compatible processing; Described soft starting circuit control three phase rectifier main circuit output major loop makes the major loop energising after filter capacitor is charged to setting voltage.
Above-described dual transformer high frequency stud welder; Outside the three phase rectifier main circuit, include the control mainboard, be used for after three phase rectifier filtering, DC voltage on the bus or electric current are got into the DSP control chip through hardware isolated; Monitor in real time; Carry out overvoltage or overcurrent protection, described control mainboard mainly is made up of DSP control chip and CPLD, and the DSP control chip adopts the up-to-date TMS320F28335DSP control chip of TI; CPLD is the abbreviation of CPLD (Complex Programmable Logic Device), adopts the real-time CPLD of EMP240 of ALTERA.
Above-described dual transformer high frequency stud welder; Also include bridge one drive plate; Described bridge one drive plate is connected current sample with IGBT bridge switch one output; After the chip for driving of bridge one drive plate detected IGBT bridge switch one overcurrent, the output overcurrent signal was then closed the driving of bridge one drive plate to said CPLD at once.
Above-described dual transformer high frequency stud welder; Also include bridge two drive plates; Described bridge two drive plates are connected current sample with IGBT bridge switch two outputs; After the chip for driving of bridge two drive plates detected IGBT bridge switch two overcurrents, the output overcurrent signal was then closed the driving of bridge two drive plates to CPLD at once.
Above-described dual transformer high frequency stud welder; Also include man-machine interface; Described CPLD receives bridge two drive plates or bridge two drive plate over-current signals were kept above five inversion cycles; Work and output fault-signal that the DSP control chip then stops high-frequency inverter circuit one or high-frequency inverter circuit two show this signal demand manual reset on man-machine interface.
Above-described dual transformer high frequency stud welder; Also comprise bridge one drive plate; Described bridge one drive plate is connected voltage sample with IGBT bridge switch one output; After the chip for driving of bridge one drive plate detects one overvoltage of IGBT bridge switch, the output overvoltage signal then will drive the driving of the moving plate of a bridge at once and close to CPLD.
Above-described dual transformer high frequency stud welder; Also comprise bridge two drive plates; Described bridge two drive plates are connected voltage sample with IGBT bridge switch two outputs; After the chip for driving of bridge two drive plates detects two overvoltages of IGBT bridge switch, the output overvoltage signal then will drive the driving of the moving plate of two bridges at once and close to CPLD.
Above-described dual transformer high frequency stud welder; Also comprise man-machine interface; Described CPLD receives bridge two drive plates or bridge two drive plate overvoltage signals were kept above five inversion cycles; Work and output fault-signal that the DSP control chip then stops high-frequency inverter circuit one or high-frequency inverter circuit two show that on man-machine interface this signal can automatically reset.
The beneficial effect of the dual transformer high frequency stud welder of the utility model is: adopt the two-phase high-frequency inverter circuit of parallel connection mutually, merge filtering output ripple DC current afterwards, compare than single inverter circuit, can realize more high-power output; Adopt the DSP control chip to add that real-time CPLD and IGBT drive plate realize the full-digital control to inverter circuit, voltage, electric current, the temperature of inverter circuit are monitored in real time and protected.
Description of drawings
Fig. 1 is the three phase rectifier main circuit theory diagram of the utility model embodiment.
Fig. 2 is the three phase rectifier main circuit schematic diagram of the utility model embodiment.
Fig. 3 is the schematic block circuit diagram of the utility model embodiment.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in detail.
Shown in accompanying drawing 3; The stud welder of present embodiment mainly comprise following structure division: electromagnetic compatibility circuit (1), soft starting circuit (2), three phase rectifier filter circuit (3), high-frequency inverter circuit one (4), high-frequency inverter circuit two (5), output filtering and bypass circuit (6), welding output (7), control mainboard (8), bridge one drive plate (44), bridge two drive plates (54) and man-machine interface (9).
Be depicted as three phase rectifier main circuit schematic diagram like accompanying drawing 2, the electromagnetic compatibility circuit of present embodiment advances electricity with three-phase and gets into the three phase rectifier filter circuit through suitable High-frequency Interference, compatible processing.Soft starting circuit mainly is to be to reduce bus current in start, and control three phase rectifier main circuit output major loop makes the major loop energising after filter capacitor is charged to setting voltage, reach the purpose of safety opening terminal.
The three phase rectifier of present embodiment and filter circuit are mainly by filter inductance L1; Filter capacitor CA, CB, CC; And rectifier D1 forms, filter inductance L1 wherein, and filter capacitor CA, CB, CC are used for the filtering Disturbance in Power Net and reduce the contamination to electrical network; D1 is becoming direct current after the three-phase electricity rectification of power frequency, to inverter electric energy being provided.
The high-frequency inverter circuit of present embodiment stud welder adopts two groups of high-frequency inverter circuits parallel with one another to constitute; Every group of high frequency power transformation road all is made up of an IGBT bridge switch, a high frequency transformer and a rectifying and wave-filtering respectively; Wherein the IGBT bridge switch is made up of four IGBT pipe Q1, Q2, Q3, Q4 and driver modules; Convert the unsteady flow electric current from the DC current of three phase rectifier and filter circuit output at the IGBT bridge switch, again parallel connection entering filtering output and bypass circuit behind high frequency transformer, back level fast recovery diode rectifying and wave-filtering.
The main circuit of present embodiment stud welder flows to: three-phase alternating current advances electricity to carry out getting into three-phase commutation bridge rectification and capacitor filtering after suitable High-frequency Interference and the compatible processing through the electromagnetic compatibility circuit earlier; Electric current divides two the tunnel to get into two groups of high-frequency inverter circuits respectively; Through the IGBT bridge switch; Merge one the tunnel behind high frequency transformer, the rectifying and wave-filtering; Anodally after the step filtering again connect welding work pieces to the welding output through current divider, negative pole through by-pass inductor bypass controllable silicon to welding output coupling bar tack welding rifle.
The control mainboard of present embodiment stud welder adds that by the up-to-date TMS320F28335DSP control chip of TI the real-time CPLD of EMP240 of ALTERA and high performance isolation IGBT driving constitute The whole control system.
The digital inversion control process of present embodiment stud welder: there is overvoltage, overcurrent, excess temperature, the IGBT overcurrent of prime at first protection aspect; The back level has transformer and rectifier excess temperature, open circuit, short circuit and soft start protection; Driving power, carry rifle power supply, contact power protection, also have the control connection line, drive connecting line and do not connect protection.Three-phase alternating current advances electricity after three phase rectifier and filtering, the DC voltage on the bus, electric current is advanced the DSP control chip through hardware isolated monitor in real time, carries out overvoltage, overcurrent protection.
The overcurrent protection of IGBT bridge switch is the CPLD that arrives the control mainboard in bridge drive plate chip detection to overcurrent and output overcurrent signal; Hardware is closed driving at once; Surpass five inversion cycles if this over-current signal is kept, the DSP control chip then stops inverter circuit work and exports fault-signal.
As long as the DSP control chip detect temperature that temperature surpass to set then inverter circuit can not work next time, below the temperature line that reaches startup, other protection just can not be worked as long as whole welding machine occurs.
In addition; The work characteristics of two inverter circuits: their power output of the high frequency transformer of two inverter circuits has the branch of size in fact; DSP can operate two inverters respectively according to welding process at times; Such as, upset phase before welding finishes, can only let the little inverter circuit work of power output and close the big inverter circuit of power output; Because of the control of the main still constant current of peg welding, each inverter circuit secondary all has a current detecting, also has a current detecting after the parallel connection, and the first two is in order to detect the band lotus of each inverter circuit, and back one is the electric current of peg welding process requirement.
Native system is set the peg parameters of welding through man-machine interface, like little size of current, little current time, big size of current, big current time, arc voltage judgement, upset current size, upset current time, in advance fall the rifle time, carry the rifle height, rifle speed etc. falls.
Claims (9)
1. dual transformer high frequency stud welder; Comprise the three phase rectifier main circuit; It is characterized in that: described three phase rectifier main circuit comprises high-frequency inverter circuit one (4) and high-frequency inverter circuit two (4) and the output filtering and the bypass circuit (6) of three phase rectifier filter circuit (3), two parallel connections; Described high-frequency inverter circuit one (4) comprises IGBT bridge switch one (41), high frequency transformer one (42) and rectifying and wave-filtering one (43), and described high-frequency inverter circuit two (5) comprises IGBT bridge switch two (51), high frequency transformer two (52) and rectifying and wave-filtering two (53);
Wherein, said three phase rectifier filter circuit (3) divides two-way to get into described two high-frequency inverter circuits (4,5) after three-phase alternating current is transformed into direct current; Described two high-frequency inverter circuits (4,5) convert direct current to high-frequency alternating current, and alternating current is more respectively through IBGT bridge switch (41; 51), high frequency transformer (42; 52), rectifying and wave-filtering (43,53) back merges through output filtering and bypass circuit (6) generation pulsating direct current welding current, by welding output (7) output.
2. dual transformer high frequency stud welder according to claim 1; It is characterized in that: described three phase rectifier main circuit includes electromagnetic compatibility circuit and soft starting circuit; Described electromagnetic compatibility circuit advances electricity with three-phase and gets into the three phase rectifier filter circuit through High-frequency Interference, compatible processing; Described soft starting circuit control three phase rectifier main circuit output major loop makes the major loop energising after filter capacitor is charged to setting voltage.
3. dual transformer high frequency stud welder according to claim 1 and 2; It is characterized in that: described dual transformer high frequency stud welder also includes the control mainboard; Be used for after three phase rectifier filtering, DC voltage on the bus or electric current are got into the DSP control chip through hardware isolated, monitor in real time; Carry out overvoltage or overcurrent protection, said control mainboard comprises DSP control chip and CPLD.
4. dual transformer high frequency stud welder according to claim 3; It is characterized in that: described dual transformer high frequency stud welder also includes bridge one drive plate; Described bridge one drive plate is connected current sample with IGBT bridge switch one output; After the chip for driving of bridge one drive plate detected IGBT bridge switch one overcurrent, the output overcurrent signal was then closed the driving of bridge one drive plate to said CPLD at once.
5. dual transformer high frequency stud welder according to claim 4; It is characterized in that: said dual transformer high frequency stud welder also includes bridge two drive plates; Described bridge two drive plates are connected current sample with IGBT bridge switch two outputs; After the chip for driving of bridge two drive plates detected IGBT bridge switch two overcurrents, the output overcurrent signal was then closed the driving of bridge two drive plates to CPLD at once.
6. according to claim 4 or 5 described dual transformer high frequency stud welders; It is characterized in that: described dual transformer high frequency stud welder also includes man-machine interface; Described CPLD receives bridge one drive plate or bridge two drive plate over-current signals were kept above five inversion cycles; Work and output fault-signal that the DSP control chip then stops high-frequency inverter circuit one or high-frequency inverter circuit two show this signal demand manual reset on man-machine interface.
7. dual transformer high frequency stud welder according to claim 3; It is characterized in that: described dual transformer high frequency stud welder also comprises bridge one drive plate; Described bridge one drive plate is connected voltage sample with IGBT bridge switch one output; After the chip for driving of bridge one drive plate detected one overvoltage of IGBT bridge switch, the output overvoltage signal was then closed the driving of bridge one drive plate to CPLD at once.
8. dual transformer high frequency stud welder according to claim 7; It is characterized in that: described dual transformer high frequency stud welder also comprises bridge two drive plates; Described bridge two drive plates are connected voltage sample with IGBT bridge switch two outputs; After the chip for driving of bridge two drive plates detected two overvoltages of IGBT bridge switch, the output overvoltage signal was then closed the driving of bridge two drive plates to CPLD at once.
9. according to claim 7 or 9 described dual transformer high frequency stud welders; It is characterized in that: described dual transformer high frequency stud welder also comprises the machine interface; Described CPLD receives bridge one drive plate or bridge two drive plate overvoltage signals were kept above five inversion cycles; Work and output fault-signal that the DSP control chip then stops high-frequency inverter circuit one or high-frequency inverter circuit two show that on man-machine interface this signal can automatically reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203118007U CN202224811U (en) | 2011-08-25 | 2011-08-25 | High-frequency stud welder with two transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203118007U CN202224811U (en) | 2011-08-25 | 2011-08-25 | High-frequency stud welder with two transformers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202224811U true CN202224811U (en) | 2012-05-23 |
Family
ID=46075418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203118007U Expired - Lifetime CN202224811U (en) | 2011-08-25 | 2011-08-25 | High-frequency stud welder with two transformers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202224811U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109352159A (en) * | 2018-12-27 | 2019-02-19 | 中正智控（江苏）智能科技有限公司 | Dual output welding inverter power source and control method |
| 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 |
-
2011
- 2011-08-25 CN CN2011203118007U patent/CN202224811U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109352159A (en) * | 2018-12-27 | 2019-02-19 | 中正智控（江苏）智能科技有限公司 | Dual output welding inverter power source and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201726182U (en) | High voltage ultracapacitor power battery charger | |
| CN102075097A (en) | Method for controlling n+1 fault redundancy of cascade type converter | |
| CN103915856B (en) | A kind of base station is grid-connected-charging photovoltaic micro-inverter system and control method thereof | |
| CN104067503A (en) | Power converter | |
| CN102315680A (en) | High-voltage and super-capacitance power battery charger | |
| CN202721450U (en) | Fully controllable energy feedback device | |
| CN103138355A (en) | Charge-discharge control system | |
| CN102761287A (en) | Digital power module | |
| CN102957196A (en) | Inverter and charger integrated modularization H-bridge cascade stage UPS (uninterrupted power supply) single/three-phase system | |
| CN104269914A (en) | Wind-solar complementary control and inversion integrated machine | |
| CN204190636U (en) | PWM rectifier circuit topological structure | |
| CN101521393A (en) | On-line uninterrupted power supply device | |
| CN108390575A (en) | A kind of current converter for shipping shore power system | |
| CN104092438A (en) | Photovoltaic energy storage system | |
| CN202224811U (en) | High-frequency stud welder with two transformers | |
| CN103441694A (en) | Large-power distribution type energy storage converter | |
| CN201682316U (en) | High-frequency soft switching UPS of locomotive air conditioner | |
| CN101860070A (en) | Uninterruptible power supply for high-frequency soft switch of locomotive air conditioner and realization method thereof | |
| CN104410294A (en) | Train power supply system | |
| CN204190641U (en) | Based on the high-power PWM rectifier circuit topological structure of LCL filtering | |
| CN202997658U (en) | Inverter and charger integrally modularized H-bridge cascade UPS single/three-phase system | |
| CN203554321U (en) | IGBT rectifier circuit | |
| CN210182988U (en) | Mixed type direct current ice melting device | |
| CN203967967U (en) | The bypass circuit of uniform flow type high voltage transducer power unit | |
| CN203313070U (en) | PWM rectification modules and power supply formed through integration of PWM rectification modules |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120523 |