CN201183162Y - MOSFET inversion type arc welding machine having VRD function - Google Patents
MOSFET inversion type arc welding machine having VRD function Download PDFInfo
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- CN201183162Y CN201183162Y CNU2008201051212U CN200820105121U CN201183162Y CN 201183162 Y CN201183162 Y CN 201183162Y CN U2008201051212 U CNU2008201051212 U CN U2008201051212U CN 200820105121 U CN200820105121 U CN 200820105121U CN 201183162 Y CN201183162 Y CN 201183162Y
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- arc welding
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Abstract
The utility model relates to a MOSFET inverter type arc welding machine with VRD function, which comprises an EMC circuit, an input rectification filter circuit, an inverter circuit, an isolating voltage reduction circuit, a secondary rectification filter circuit, a control circuit, and an isolating drive circuit which are connected in sequence, and the isolating drive circuit is connected with the inverter circuit, especially, the MOSFET inverter type arc welding machine is provided with a shockproof circuit, two ends of which are respectively connected with the secondary rectification filter circuit and the control circuit. The shockproof circuit is composed of resistors R301, R302, and R303, a diode D301, a capacitor C301, an optical coupler G301 and a voltage regulator tube D302 which are connected. The inverter circuit is a full bridge inverter circuit which is provided with a PCB board and an F-shaped cooling plate, the shockproof function is added, so the safety of a hand welder is improved, and the Europe CE standard EMC detecting requirements are met. The MOSFET inverter type arc welding machine is used for agriculture and industry.
Description
Technical field
The utility model relates to welding equipment, especially a kind of MOSFET inverter arc welding machine with the VRD function.
Background technology
The inverter type welder manufacturer of present single-phase input is a lot, and its product varies, because the processing of manufacturabilities such as placement-and-routing is bad, product is difficult to detect by European CE standard EMC.Because the main transformer leakage inductance is bigger, the welding machine output current is during greater than 100A, and the electromagnetic radiation of welding machine is very serious, has a strong impact on power grid quality and people's physical and mental health, and other equipment of periphery are also caused interference.Because the air channel design is reasonable inadequately, numerous product cyclic duration factors of many producers are all very low, can't satisfy long instructions for use in addition.Voltage ratio was higher when the hand welding machine was unloaded, had certain potential safety hazard.
Summary of the invention
The technical problems to be solved in the utility model is on the basis of MOSFET inverter arc welding machine, adds the VRD function, and promptly anti-electric shock function improves the security performance of hand welding machine, detects requirement thereby can satisfy European CE standard EMC.
For solving the problems of the technologies described above, the MOSFET inverter arc welding machine of the utility model band VRD function, comprise the EMC circuit, input rectifying filter circuit, inverter circuit, isolated buck circuit, secondary current rectifying and wave filtering circuit, control circuit, the isolated drive circuit that are linked in sequence, and isolated drive circuit links to each other with inverter circuit, particularly be provided with anti-electric-shocking circuit, these anti-electric-shocking circuit two ends connect secondary current rectifying and wave filtering circuit and control circuit respectively.
Should connect and compose by resistance R 301-R303, diode D301, capacitor C 301, optocoupler G301 and voltage-stabiliser tube D302 by anti-electric-shocking circuit.
This inverter circuit is a full bridge inverter, and the brachium pontis of this inverter circuit constitutes by MOSFET FET (VT3, VT4, VT5, VT6) is in parallel, 4.7～10R resistance of grid series connection of every FET.
Be provided with pcb board and F shape fin, described control circuit, isolated drive circuit and inverter circuit are produced on the pcb board, described isolated buck circuit and secondary current rectifying and wave filtering circuit are produced on the middle pcb board, last pcb board is installed on two groups of F shape heat sink top surface, middle pcb board is installed on two groups of F shape fin bottom surfaces, about two groups of F shape fin install relatively and constitute the air channel, bottom, the electronic circuit component on the middle pcb board is positioned at this air channel, bottom.
The utility model adopts the full-bridge inverting mode, improves power factor, reduces the power supply own loss, reduces cost.Owing to designed the EMC filter circuit at power input, made it really satisfy the CE requirement.Form air duct type structure, perfect heat-dissipating, cyclic duration factor height owing to adopt two boards and two radiators.Particularly have anti-electric shock function, safe and reliable.Circuitry is simple, and defencive function is comprehensive, and production technology is simple, and debugging is convenient.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Fig. 3 is the utility model host groups assembling structure schematic diagram.
1 is the EMC circuit among the figure, and 2 is current rectifying and wave filtering circuit, and 3 is inverter circuit, and 4 is the isolated buck circuit, and 5 is the secondary current rectifying and wave filtering circuit, 6 anti-electric-shocking circuits, and 7 is control circuit, 8 is isolated drive circuit.K1 is the control thick film circuit; Q1 is the isolation drive thick film circuit; E1 is an auxiliary power circuit.
The specific embodiment
As shown in Figure 1, the MOSFET inverter arc welding machine of the utility model band VRD function, comprise the EMC circuit 1, input rectifying filter circuit 2, inverter circuit 3, isolated buck circuit 4, secondary current rectifying and wave filtering circuit 5, control circuit 7, the isolated drive circuit 8 that are linked in sequence, and isolated drive circuit 8 links to each other with inverter circuit 3, be provided with anti-electric-shocking circuit 6 especially, these anti-electric-shocking circuit 6 two ends connect secondary current rectifying and wave filtering circuit 5 and control circuit 7 respectively.
The formation of each circuit shown in Fig. 1 and correlation are referring to Fig. 2.
As shown in Figure 2, EMC circuit 1 is by electric capacity (C101, C102, C103, C104, C105), resistance R 101, and inductance (L101, L102, L103, L104) is common to be constituted.
Anti-electric-shocking circuit 6 is connected and composed by resistance R 301-R303, diode D301, capacitor C 301, optocoupler G301 and voltage-stabiliser tube D302.
Driving amplifying circuit is made of FET VT7～VT10.
Drive thick film circuit Q1, by one group of elementary input, the driving transformer of four groups of secondary outputs, and some resistance, diode, Zener diode, electric capacity is formed, and finishes the driving function of four brachium pontis.
E1 is an auxiliary power circuit, gives the control circuit drive circuitry.
As shown in Figure 2, single-phase input AC electricity absorbs spike burr voltage through electric capacity X2 (C105) earlier, passes through that (L103 is L104) with the restriction harmonic current by two-wire and the common mode inductance on the same magnet ring again.(C104 C103) prevents that voltage is unsettled, and then (C101, C102) (L102 L101) constitutes second-order filter circuit, drops to the burr of importing waveform minimum with two common mode inductances by two electric capacity X2 through two electric capacity Y2 again.
T3 constantly samples to main circuit by current transducer, promptly obtains a high voltage for capacitor C 16 chargings by BR2 absolute value rectification circuit and resistance R 10～R13 in case unusual excessive electric current occurs, and control module K1 is played a protective role.
Voltage negative feedback and given circuit be by resistance R 35～R39, potentiometer VR4, electric capacity (C29, C31, C33), voltage-stabiliser tube (Z5, Z6) and triode Q2 constitute.When fluctuation takes place output voltage, oppositely regulate set-point by voltage negative feedback circuit, to reach the effect of stable output.
Thermoswitch RT1 is installed on the radiator of circuitry, in case radiator (referring to Fig. 2) temperature is too high, thermoswitch is conducting just, and control module K1 is played a protective role, and welding machine is quit work.
As shown in Figure 2, resistance R 4, capacitor C 6; Resistance R 5, capacitor C 8; Resistance R 14, capacitor C 7; Resistance R 16, capacitor C 9 groupings constitute the absorption pattern of 4 brachium pontis, absorb the spike burr that stray inductance produces.
The VRD function realizes: output voltage is lower when welding machine is worked, diode D301 conducting, and elementary being dragged down of optocoupler and ending, the secondary output high level of optocoupler does not influence control circuit.Output voltage ends than higher then diode D301 when unloaded, and the 24V power supply is given the elementary power supply of optocoupler by resistance R 303.Optocoupler secondary voltage step-down, control panel 13 pin are dragged down, thus the control output voltage reduces, and prevents the function that the people is shocked by electricity when finishing zero load.
As shown in Figure 2, the single-phase alternating current power supply is through EMC circuit filtering interfering, again through rectifier bridge BR1 rectification, become direct current after the electrochemical capacitor C2 filtering, be high-frequency alternating current by MOSFET FET full-bridge inverting again, reduce to the high frequency low voltage alternating current by the isolated buck circuit again, (D2, D3) rectification is a direct current through two groups of high speed rectifying tubes.Resistance (R6, R7), electric capacity (C11 C12) is corresponding absorption circuit, with the protection rectifying tube (D3, D2).
Output reactance L1 is used for limit inrush currents and make output current continuous.
Control circuit K1 can realize the function of pulsewidth modulation (PWM), temperature protection, switching on and shutting down protection and over-and under-voltage protection; its pwm signal is delivered to the drive circuit that FET VT7～VT10 forms; promote isolated drive circuit and produce 4 road signals of opening or turn-off FET fast; promote 4 brachium pontis; realize full-bridge inverting, drive circuit is just simplified greatly like this.
As shown in Figure 3, be provided with pcb board (10,40) and F shape fin (20,30), described control circuit 7, isolated drive circuit 8 and inverter circuit 3 are produced on the pcb board 10, during described isolated buck circuit 4 and secondary current rectifying and wave filtering circuit 5 are produced on the pcb board 40.As shown in arrow 50, last pcb board 10 is installed on two groups of F shape fin (20,30) end face.As shown in arrow 60, middle pcb board 40 is installed on two groups of F shape fin (20,30) bottom surface.About two groups of F shape fin (20,30) install relatively and constitute air channel, bottom 70, the electronic circuit component on the middle pcb board 40 is positioned at this air channel, bottom 70.Remaining circuit is installed on the complete machine base plate (not drawing among the figure).Its structure is after such optimum organization, and the little thermal diffusivity of volume is good, assembles easy to maintenance.
The MOSFET FET is selected the withstand voltage 500V that is for use in the utility model, and electric current is 20A, and each brachium pontis is the parallel connection of 3 MOSFET FETs.
According to the band VRD function MOSFET inverter arc welding machine of the utility model Fig. 2, Fig. 3 assembling, test result reaches following specification requirement: 1, rated input power 5.4KW; 2, specified input current 24.5A; 3, rated output voltage 26.4V; 4, output current is regulated 20A～160A; 5, cyclic duration factor 60%; 6, floating voltage 56V; 7, open circuit loss 40W; 8, efficient 85%; 9, power factor 0.93.
Claims (4)
1. MOSFET inverter arc welding machine with the VRD function, comprise the EMC circuit, input rectifying filter circuit, inverter circuit, isolated buck circuit, secondary current rectifying and wave filtering circuit, control circuit, the isolated drive circuit that are linked in sequence, and isolated drive circuit links to each other with inverter circuit, it is characterized in that, be provided with anti-electric-shocking circuit, these anti-electric-shocking circuit two ends connect secondary current rectifying and wave filtering circuit and control circuit respectively.
2. the MOSFET inverter arc welding machine of band VRD function according to claim 1 is characterized in that this anti-electric-shocking circuit is connected and composed by resistance R 301-R303, diode D301, capacitor C 301, optocoupler G301 and voltage-stabiliser tube D302.
3. the MOSFET inverter arc welding machine of band VRD function according to claim 1, it is characterized in that, this inverter circuit is a full bridge inverter, the brachium pontis of this inverter circuit is made of MOSFET FET VT3, VT4, VT5, VT6 parallel connection, 4.7-10R resistance of grid series connection of every FET.
4. the MOSFET inverter arc welding machine of band VRD function according to claim 1, it is characterized in that, be provided with pcb board and F shape fin, described control circuit, isolated drive circuit and inverter circuit are produced on the pcb board, described isolated buck circuit and secondary current rectifying and wave filtering circuit are produced on the middle pcb board, last pcb board is installed on two groups of F shape heat sink top surface, middle pcb board is installed on two groups of F shape fin bottom surfaces, about two groups of F shape fin install relatively and constitute the air channel, bottom, the electronic circuit component on the middle pcb board is positioned at this air channel, bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201051212U CN201183162Y (en) | 2008-04-16 | 2008-04-16 | MOSFET inversion type arc welding machine having VRD function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201051212U CN201183162Y (en) | 2008-04-16 | 2008-04-16 | MOSFET inversion type arc welding machine having VRD function |
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| CN201183162Y true CN201183162Y (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008201051212U Expired - Fee Related CN201183162Y (en) | 2008-04-16 | 2008-04-16 | MOSFET inversion type arc welding machine having VRD function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528230A (en) * | 2011-12-20 | 2012-07-04 | 浙江武义旺峰工具有限公司 | Intelligent gas shielded welding converter |
| CN106425034A (en) * | 2016-12-13 | 2017-02-22 | 许昌学院 | Method for wide input voltage of direct current inverter welding machine and wide input voltage circuit thereof |
| CN112015222A (en) * | 2020-08-28 | 2020-12-01 | 重庆凯米尔汽油机有限公司 | Power supply no-load voltage adjusting device |
-
2008
- 2008-04-16 CN CNU2008201051212U patent/CN201183162Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102528230A (en) * | 2011-12-20 | 2012-07-04 | 浙江武义旺峰工具有限公司 | Intelligent gas shielded welding converter |
| CN102528230B (en) * | 2011-12-20 | 2014-10-01 | 浙江旺峰电器有限公司 | Intelligent gas shielded welding converter |
| CN106425034A (en) * | 2016-12-13 | 2017-02-22 | 许昌学院 | Method for wide input voltage of direct current inverter welding machine and wide input voltage circuit thereof |
| CN106425034B (en) * | 2016-12-13 | 2020-11-20 | 许昌学院 | Wide input voltage circuit of direct current inverter welding machine |
| CN112015222A (en) * | 2020-08-28 | 2020-12-01 | 重庆凯米尔汽油机有限公司 | Power supply no-load voltage adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 518126, Guangdong, Baoan District, Xixiang province Shenzhen Street Hengfeng Industrial City C2 Building 1, 2, 3, 4, West and 5, West and C4, building 5 Patentee after: Shenzhen Jasic Technology Co., Ltd. Address before: 4, building 518126, building C2, Hengfeng Industrial Town, Xixiang, Shenzhen, Baoan District, Guangdong Patentee before: Shenzhen Jasic Technology Development Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Pingshan Qing Lan Shenzhen Guangdong province 518126 City Road No. 3 Patentee after: Shenzhen Jasic Technology Co., Ltd. Address before: 518126, Guangdong, Baoan District, Xixiang province Shenzhen Street Hengfeng Industrial City C2 Building 1, 2, 3, 4, West and 5, West and C4, building 5 Patentee before: Shenzhen Jasic Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090121 Termination date: 20160416 |