CN2475502Y - Large power inverter welding machine - Google Patents
Large power inverter welding machine Download PDFInfo
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- CN2475502Y CN2475502Y CN 01224385 CN01224385U CN2475502Y CN 2475502 Y CN2475502 Y CN 2475502Y CN 01224385 CN01224385 CN 01224385 CN 01224385 U CN01224385 U CN 01224385U CN 2475502 Y CN2475502 Y CN 2475502Y
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Abstract
The utility model relates to a high power inversion welder, comprising a main circuit of arc welding inverter, driver boards and a control board, the main circuit consists of n arc welding inverter units linked in parallel, which is characterized in that: the outputs of n driver boards are connected with the controllers of the corresponding electric power semiconductor modules, the inputs of the n driver boards are respectively connected with the corresponding output ends of the control board; the primary electrode of the power transformer of each arc welding inverter unit is linked with a current transformer in series, the output windings of the n current transformers are linked with the corresponding terminals of the control board. The advantages of the utility model are that: using one control board to control multiple power units, the control is easy; the current signals come form each power unit, achieving the real symmetrical flow; the adjustment is convenient.
Description
The utility model relates to a kind of electric welding machine, the high power contravariant welding machine that particularly a kind of arc welding is used.
As everyone knows: because inverter type welder transformer operating frequency (as 10KHz) is higher than power frequency (50Hz) far away, and volume of transformer, weight and its operating frequency are inversely proportional to, thereby inverter type welder has that volume is little, in light weight, efficient electricity-saving and the good characteristics such as (current stabilizations, it is few to splash) of characteristic.But the present inverter type welder maximum weld electric current of producing only reaches 630A, and this welding machine can satisfy conventional manual electric arc welding needs.But occasions such as resonable arc welds automatically, flux-cored wire non gas shielded welding, carbon arc air gouging; the welding machine (as 800A, 1000A, 1250A, 1500A, 2000A) that needs bigger rated welding current; and the existing unit inverter just is difficult to the big like this electric current of output, and this has become the obstacle that inverter type welder is used at above-mentioned welding field.For addressing this problem, normally the inverter type welder more than two or two is composed in parallel a great-current inversion welding machine, way is with its three phase mains terminals and connects and with positive-negative output end and connect, and this method exists shortcoming as follows:
1, a plurality of electric current regulator potentiometers is arranged, use inconvenience;
2, there is interactive interference in multi-group power;
3, each parellel inversion power current-sharing adjustment trouble.
Other has a kind of great-current inversion welding machine is with a plurality of power cell parallel connections, and control this a plurality of inverter powers unit simultaneously with a control panel, this method can solve with a plurality of potentiometers and regulate the problem that electric current brought, but can only come power taking stream feedback signal from total output current, can't reflect electric current (power) size of each unit.
The purpose of this utility model is to overcome the above-mentioned deficiency of prior art, and a kind of easy to adjust, high power contravariant welding machine that output current can reach 800-2000A is provided.This welding machine is regulated electric current with a potentiometer, and can reach each inversion unit current-sharing.
Above-mentioned purpose of the present utility model is realized by following technical scheme.
A kind of high power contravariant welding machine comprises arc welding inverter main circuit, drive plate and a control panel, and this arc welding inverter main circuit is to be composed in parallel by n arc welding inversion unit; It is characterized in that: the control utmost point of the power semiconductor device of n arc welding inversion unit joins with the triggering signal output of n corresponding drive plate, and the control signal input of n drive plate connects the corresponding output of control panel respectively; The elementary serial connection one of the power transformer of each arc welding inversion unit is used for the current transformer of current signal sampling, and the output winding of n current transformer connects the corresponding terminals of control panel; On this control panel, be provided with n rectification circuit, the output winding of a said n current transformer is via the rectifier of the corresponding wiring termination correspondence of control panel, the output of n rectifier and connect after connect the input of the error amplifier in the pulse-width modulator (PWM), be used to control pulse width modulator output duty of ratio; Corresponding to a said n drive plate, be provided with n pulse distributor, input termination pulse-width modulator (PWM) output pin of n pulse distributor becomes one group of output signal of pulse-width modulator (PWM) into the input terminal that n group output signal connects an above-mentioned n drive plate via n pulse distributor.
Except that above-mentioned essential features, in specific implementation process, also can replenish following technology contents:
Each arc welding inversion unit in this arc welding inverter main circuit, the anode after the inversion rectification be in parallel the back for general supply just; Each arc welding inversion unit, parallel connection is negative for general supply behind the negative terminal tandem electric inductance after the inversion rectification.
Each arc welding inversion unit in this arc welding inverter main circuit, the anode after the inversion rectification be in parallel the back for general supply just; Each arc welding inversion unit, the back parallel with one another of the negative terminal after inversion rectification tandem electric inductance is that general supply is negative.
Said power semiconductor module is IGBT module or IPM module.
The output winding of current transformer has centre cap, and the rectification circuit that connects is by two full-wave rectifiers that diode constituted.
This pulse distributor is a gate circuit.
N=2,3,4 ... in arbitrary number.
Advantage of the present utility model is:
1, control a plurality of power cells with a control panel, control is convenient.
2, current signal is taken from each power cell, reaches real current-sharing.
3, easy to adjust.
For architectural feature of the present utility model and the effect reached thereof are had further understanding, enumerate a specific embodiment now and be described with reference to the accompanying drawings as follows:
Description of drawings:
Fig. 1 is the circuit structure diagram of a preferred embodiment of the present utility model.
Fig. 2 is the circuit structure diagram of another preferred embodiment of the present utility model.
Fig. 3 is the utility model control panel partial circuit figure.
As Fig. 1, shown in Figure 3, a kind of high power contravariant welding machine provided by the utility model, comprise arc welding inverter main circuit 1, control panel 2 and drive plate 3, this arc welding inverter main circuit 1 be by n platform arc welding inversion unit 11,12 ... 1n composes in parallel, and this arc welding inversion unit mainly is made up of current rectifying and wave filtering circuit 111, inverter 112, power transformer T1 and lower pressure rectifier circuit.In the embodiment in figure 1, the semi-bridge type inverter that inverter is made up of single power semiconductor module and dividing potential drop electric capacity in other embodiment, also can be other bridge-type inverters; Corresponding to said n platform arc welding inversion unit be provided with n drive plate 21,22 ... 2n, the n group control utmost point A11 of the power semiconductor module of n arc welding inversion unit, S11, A21, S21, A12, S12, A22, S22, the triggering signal output of A1n, S1n, drive plate that A2n, S2n are corresponding with it joins, and the control signal input of n drive plate meets corresponding output Y11, Y21, the Y31 of control panel, Y12, Y22, Y32 respectively,, Y1n, Y2n, Y3n; The elementary serial connection one of the power transformer of each arc welding inversion unit is used for the current transformer of sampling current signal, total n current transformer H1, H2 ..., Hn, the output winding of n current transformer meets corresponding terminals Y0, H11, the H12 of control panel, H21, H22,, Hn1, Hn2.
The main distinction of this control panel and unit control panel is: be provided with n rectifier, the output of n rectifier and connect after connect the input of the error amplifier in the pulse-width modulator (PWM), be used to control pulse width modulator output duty of ratio.In the illustrated embodiment, the model of used pulse-width modulator (PWM) is 3525.The output winding of a said n current transformer is via corresponding terminals H11, the H12 of control panel, H21, H22, Hn1, Hn2 connect corresponding rectifier, the output negative terminal of n rectifier and connect after contact Y0 connect 2 pin of pulse-width modulator (PWM), the output plus terminal of n rectifier and connect after connect 1 pin of pulse-width modulator (PWM), this 1,2 pin is the input pin of the error amplifier in the above-mentioned pulse-width modulator (PWM).Corresponding to a said n drive plate, be provided with n pulse distributor, input termination pulse-width modulator (PWM) output pin of n pulse distributor, one group of output signal of pulse-width modulator (PWM) is become Y31, the Y32 that n group output signal connects an above-mentioned n drive plate via n pulse distributor ... Y3, Y21, Y22 ... Y2n, Y11, Y12 ... the Y1n terminals.In the illustrated embodiment, said pulse distributor is a gate circuit, in concrete enforcement, this gate circuit is four NAND gate integrated circuits, 9 pin of four NAND gate integrated circuits connect 14 pin of pulse-width modulator (PWM), 12 pin of four NAND gate integrated circuits connect 11 pin of pulse-width modulator (PWM), 4 pin and 10 pin of each four NAND gate integrated circuit also meet the back connects an above-mentioned n drive plate by the contact of control panel Y31, Y32, the Y3n terminals, this Y31, Y32, the Y3n pin connects that control panel supplies with+the 5V power supply, 8 pin of each four NAND gate integrated circuit meet the Y21 of an above-mentioned n drive plate by the contact of control panel, Y22, the Y2n terminals, 11 pin of each four NAND gate integrated circuit meet the Y11 of an above-mentioned n drive plate by the contact of control panel, Y12, the Y1n terminals.
In the diagram specific embodiment, this power semiconductor module is IGBT module or IPM module.The output winding of current transformer has centre cap, the rectification circuit in the control panel that connects be by two full-wave rectifications that diode constituted.The output winding of available current transformer does not have centre cap in other embodiments, and the rectification circuit that connects is by four full-wave rectification bridges that diode constituted.
In this arc welding inverter main circuit the output plus terminal of each arc welding inversion unit be in parallel the back for general supply just; The negative terminal of each arc welding inversion unit after the inversion rectification respectively tandem electric inductance L1, L2 ... in parallel behind the Ln is that general supply is born (as shown in Figure 1).Also can be the output plus terminal of each arc welding inversion unit in the main circuit be in parallel the back for general supply just; Each arc welding inversion unit negative terminal after inversion rectification back parallel with one another tandem electric inductance L is general supply negative (as shown in Figure 2).
Inverter type welder for 800 amperes of outputs can be with two 400 amperes inverter type welder parallel connection, and n is 2; Inverter type welder for 1250 amperes of outputs can be with three 400 amperes inverter type welder parallel connection, and n is 3; Inverter type welder for 1500 amperes of outputs can be with three 500 amperes inverter type welder parallel connection, and n is 3; The inverter type welder parallel connection that 1600 amperes usefulness is four 400 amperes, n is 4, and so on.
In sum, high power contravariant welding machine provided by the utility model has solved for a long time that the maximum current of inverter type welder is no more than 600 amperes bottleneck, and its output current can be up to more than 2000 amperes, and easy to use, performance good.
Claims (7)
1, a kind of high power contravariant welding machine comprises arc welding inverter main circuit, drive plate and a control panel, and this arc welding inverter main circuit is to be composed in parallel by n arc welding inversion unit; It is characterized in that: the control utmost point of the power semiconductor device of n arc welding inversion unit joins with the triggering signal output of n corresponding drive plate, and the control signal input of n drive plate connects the corresponding output of control panel respectively; The elementary serial connection one of the power transformer of each arc welding inversion unit is used for the current transformer of current signal sampling, and the output winding of n current transformer connects the corresponding terminals of control panel; On this control panel, be provided with n rectification circuit, the output winding of a said n current transformer is via the rectifier of the corresponding wiring termination correspondence of control panel, the output of n rectifier and connect after connect the input of the error amplifier in the pulse-width modulator, be used to control pulse width modulator output duty of ratio; Corresponding to a said n drive plate, be provided with n pulse distributor, the input termination pulse-width modulator output pin of n pulse distributor becomes one group of output signal of pulse-width modulator into the input terminal that n group output signal connects an above-mentioned n drive plate via n pulse distributor.
2, according to the said high power contravariant welding machine of claim 1, it is characterized in that: each arc welding inversion unit in this arc welding inverter main circuit, the anode after the inversion rectification be in parallel the back for general supply just; Each arc welding inversion unit, parallel connection is negative for general supply behind the negative terminal tandem electric inductance after the inversion rectification.
3, according to the said high power contravariant welding machine of claim 1, it is characterized in that: each arc welding inversion unit in this arc welding inverter main circuit, the anode after the inversion rectification be in parallel the back for general supply just; Each arc welding inversion unit, the back parallel with one another of the negative terminal after inversion rectification tandem electric inductance is that general supply is negative.
4, according to the said high power contravariant welding machine of claim 1, it is characterized in that: this power semiconductor module is IGBT module or IPM module.
5, according to the said high power contravariant welding machine of claim 1, it is characterized in that: the output winding of current transformer has centre cap, and the rectification circuit that connects is by two full-wave rectifiers that diode constituted.
6, according to the said high power contravariant welding machine of claim 1, it is characterized in that: this pulse distributor is a gate circuit.
7, according to the said high power contravariant welding machine of claim 1, it is characterized in that: n=2,3,4 ... in arbitrary number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01224385 CN2475502Y (en) | 2001-05-24 | 2001-05-24 | Large power inverter welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01224385 CN2475502Y (en) | 2001-05-24 | 2001-05-24 | Large power inverter welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2475502Y true CN2475502Y (en) | 2002-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01224385 Expired - Fee Related CN2475502Y (en) | 2001-05-24 | 2001-05-24 | Large power inverter welding machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2475502Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628356B (en) * | 2009-08-06 | 2012-05-30 | 唐山松下产业机器有限公司 | Soft-switching inversion welder |
| CN103722319A (en) * | 2013-12-19 | 2014-04-16 | 上海广为焊接设备有限公司 | Electric welding machine and circuit control board system thereof |
-
2001
- 2001-05-24 CN CN 01224385 patent/CN2475502Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628356B (en) * | 2009-08-06 | 2012-05-30 | 唐山松下产业机器有限公司 | Soft-switching inversion welder |
| CN103722319A (en) * | 2013-12-19 | 2014-04-16 | 上海广为焊接设备有限公司 | Electric welding machine and circuit control board system thereof |
| CN103722319B (en) * | 2013-12-19 | 2015-12-30 | 上海广为焊接设备有限公司 | The circuit control board system of electric welding machine and electric welding machine thereof |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |