CN211804321U - Inverter welding machine circuit and circuit board - Google Patents
Inverter welding machine circuit and circuit board Download PDFInfo
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- CN211804321U CN211804321U CN201922470979.XU CN201922470979U CN211804321U CN 211804321 U CN211804321 U CN 211804321U CN 201922470979 U CN201922470979 U CN 201922470979U CN 211804321 U CN211804321 U CN 211804321U
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Abstract
The utility model discloses an inverter welding machine circuit, which comprises a power switch, a voltage change-over switch, a first rectifying circuit, a filter circuit, a half-bridge inverter circuit, a transformer, a second rectifying circuit, a filter inductor, a mutual inductor and a control circuit, wherein the input end of the power switch is connected with a power frequency alternating current input end, one end of the output end is connected with one input end of the first rectifying circuit, and the other end of the output end is connected with the middle end of the voltage change-over switch; the switch source switch, the first rectification circuit, the filter circuit, the half-bridge inverter circuit, the transformer, the switch power transformer and the IGBT driving transformer are distributed on the upper left corner of the circuit board, and the transformer secondary, the auxiliary coil and the second rectification circuit of the inverter welding machine circuit are distributed on the lower left corner and the lower right corner of the circuit board; the upper right corner of the circuit board is distributed with a low-electric circuit part. The safety clearance and creepage distance problem between high-low pressure have been solved to this application, and the device that generates heat concentrates the setting, improves product job stabilization nature and reliability.
Description
Technical Field
The utility model belongs to the technical field of the contravariant welding machine technique and specifically relates to a contravariant welding machine circuit and circuit board are related to.
Background
At present, the inverter welding machine circuit mostly adopts a full-bridge inverter circuit, the structure of the circuit needs 4 IGBT tubes, the IGBT tubes are expensive, correspondingly, the control circuits corresponding to the 4 IGBT tubes are relatively complex, the thought influence between high voltage and low voltage needs to be considered when the circuit board is arranged, and the complexity of the circuit board arrangement is further increased.
Therefore, how to simplify the structure of the inverter welding circuit and to arrange the wiring lines in a rational manner is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an contravariant welding circuit adopts filter circuit and half-bridge inverter circuit, through the switch switching, realized that 110V can all be suitable for with 230V input, concentrate the one side of overall arrangement at the circuit board with high-pressure part circuit, make the reasonable isolation of input high-pressure part and output low-voltage part, solved safety clearance and creepage distance problem between the high-low pressure, the reasonable overall arrangement of high-power heating device, greatly reduced power device operating temperature improves product job stabilization nature and reliability.
The above technical scheme of the utility model can be realized through following technical scheme to the purpose:
an inverter welding machine circuit comprises a power switch, a voltage change-over switch, a first rectifying circuit, a filter circuit, a half-bridge inverter circuit, a transformer, a second rectifying circuit, a filter inductor, a mutual inductor and a control circuit, wherein the input end of the power switch is connected with a power frequency alternating current input end, one end of the output end is connected with one input end of the first rectifying circuit, and the other end of the output end is connected with the middle end of the voltage change-over switch; the first open end of the voltage change-over switch is connected with the other input end of the first rectifying circuit, and the second open end of the voltage change-over switch is connected with the middle end of the filter circuit; two input ends of the filter circuit are connected with two output ends of the first rectifying circuit; the half-bridge inverter circuit is connected with the filter circuit in parallel, the control end of the half-bridge inverter circuit is connected with the control circuit, the output of the half-bridge inverter circuit is connected with the primary coil of the transformer, and two ends of the secondary coil of the transformer and two ends of the auxiliary coil are connected with the second rectifying circuit; one output end of the second rectifying circuit is connected with the positive output end of the inverter welding machine circuit after passing through the filter inductor, and the other output end of the second rectifying circuit is connected with the negative output end of the inverter welding machine circuit; the primary of the mutual inductor is connected with the primary of the transformer, and the primary of the mutual inductor is connected with the control circuit.
The utility model discloses further set up to: the power supply circuit is characterized by further comprising a relay, one end of a relay coil is connected with the control circuit, the other end of the relay coil is connected with a power supply end, and two switch ends of the relay are connected with the negative output end of the first rectifying circuit and the negative end of the filter circuit in series.
The utility model discloses further set up to: the control circuit comprises a first control chip and a second control chip, a first output group of the first control chip is connected with the direct current motor through a common mode coil, a second output group is connected with a cold spot movable wire feeding, and a third output group is connected with a gun switch; the first output group of the second control chip is connected with a power indicator, the second output group is connected with a protection indicator, the third output group is connected with welding voltage regulation, and the fourth output group is connected with wire feeding speed regulation.
The utility model discloses further set up to: the power supply also comprises a switching power supply, which is used for providing the isolated low-voltage power supply for the product and comprises a switching power supply transformer, a switching power supply chip, a switching power supply feedback circuit and a switching power supply output circuit.
The utility model discloses further set up to: the half-bridge inverter circuit also comprises an IGBT driving circuit, wherein the IGBT driving circuit is used for driving the IGBT in the half-bridge inverter circuit to work and comprises an IGBT driving transformer.
The above technical scheme of the utility model can be realized through following technical scheme to the purpose:
a circuit board of an inverter welding machine circuit comprises a power switch, a first rectification circuit, a filter circuit, a half-bridge inverter circuit, a transformer, a switching power transformer and an IGBT driving transformer which are distributed on the upper left corner of the circuit board, and a transformer secondary, an auxiliary coil, a second rectification circuit and a filter inductor which are distributed on the lower left corner and the lower right corner of the circuit board; the upper right corner of the circuit board is distributed with a low-voltage circuit part which comprises a voltage switch and a time sequence control circuit.
The utility model discloses further set up to: two electrolytic capacitors of the filter circuit are arranged side by side, radiating fins are arranged on the upper side and the lower side of the two electrolytic capacitors, two IGBT tubes in the first rectifying circuit and the half-bridge inverter circuit are arranged on the outer side of the upper radiating fins, the two IGBT tubes are arranged side by side, and the first rectifying circuit is arranged above the two IGBT tubes.
The utility model discloses further set up to: the IGBT driving transformer is arranged above one IGBT tube.
The utility model discloses further set up to: the main transformer is arranged on one side of the lower radiator, the control circuit is arranged on the control circuit board, and the control circuit board and the main transformer are arranged in parallel.
The utility model discloses further set up to: the switch power supply transformer is positioned on the other side of the control circuit board and is vertical to the control circuit board.
Compared with the prior art, the utility model has the beneficial technical effects that:
1. by arranging the change-over switch, the dual-input circuit realizes 110V and 220V, and enlarges the application range of the circuit;
2. further, the circuit board of this application has solved safety clearance and creepage distance problem between the high-low pressure through the reasonable isolation of input high-voltage part and output low-voltage part.
3. Further, the circuit board of this application concentrates the setting with high-power heating device, and the radiator is close to the wind gap, greatly reduced power device operating temperature improves product job stabilization nature and reliability.
Drawings
FIG. 1 is a schematic diagram of an inverter welding machine according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a switching power supply circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an IGBT driving circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a front structure of a circuit board of an inverter welding machine according to an embodiment of the present invention;
FIG. 5 is a schematic view of a reverse structure of a circuit board of an inverter welding machine according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the distribution of components of a circuit board of an inverter welding machine according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the distribution of components of a circuit board of an inverter welding machine according to another embodiment of the present invention;
fig. 8 is a schematic diagram of the distribution of components of a circuit board of an inverter welding machine according to another embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Detailed description of the invention
The utility model discloses an inverter welding machine circuit, as shown in fig. 1, including switch, voltage transfer switch, first rectifier circuit, filter circuit, half-bridge inverter circuit, transformer, second rectifier circuit, filter inductance, mutual-inductor, control circuit, relay, the switch input end is connected with power frequency alternating current input end, one end in the output end is connected with an input end of first rectifier circuit, the other end in the output end is connected with the middle end of voltage transfer switch; the first open end of the voltage switch is connected with the other input end of the first rectifying circuit, and the second open end of the voltage switch is connected with the middle end of the half-bridge filter circuit; two input ends of the filter circuit are connected with two output ends of the first rectifying circuit; the half-bridge inverter circuit is connected with the filter circuit in parallel, the control end of the half-bridge inverter circuit is connected with the control circuit, the output of the half-bridge inverter circuit is connected with the primary coil of the transformer, and two ends of the secondary coil of the transformer and two ends of the auxiliary coil are connected with the second rectifying circuit; one output end of the second rectifying circuit is connected with the positive output end of the inverter welding machine circuit after passing through the filter inductor, and the other output end of the second rectifying circuit is connected with the negative output end of the inverter welding machine circuit; the primary of the mutual inductor is connected with the primary of the transformer, and the primary of the mutual inductor is connected with the control circuit.
One end of the relay coil is connected with the control circuit, the other end of the relay coil is connected with the power supply end, and two switch ends of the relay are connected in series with the negative output end of the first rectifying circuit and the negative end of the filter circuit.
Specifically, the control circuit comprises a first control chip and a second control chip, wherein a first output group ICN7 of the first control chip is connected with a direct current motor through a common mode coil, a second output group ICN3 is connected with cold spot wire feeding, and a third output group ICN5 is connected with a gun switch; the first output group of the second control chip is connected with a power indicator, the second output group is connected with a protection indicator, the third output group is connected with welding voltage regulation, and the fourth output group is connected with wire feeding speed regulation.
One switch end of the switch SW2 is connected to the middle end of the filter circuit, and the other switch end is connected to one input end of the full-bridge rectification circuit; when the switch SW2 is communicated with the middle end of the filter circuit, 110V alternating current is input; when the switch SW2 is connected to one input terminal of the rectifying circuit, 220V ac power is input.
The filter circuit comprises electrolytic capacitors C1 and C7 which are connected in series, and a series resistor combination of R3 and R5 is connected in parallel at two ends of the electrolytic capacitor C1; the series resistor combination of R9 and R12 is connected in parallel at two ends of the electrolytic capacitor C7. The connection point of the series electrolytic capacitors C1 and C7 is connected to one switch terminal of the switch SW 2.
The input end of the half-bridge inverter circuit is connected in parallel with two ends of the filter circuit and comprises two IGBT tubes Q1/Q2, and the control ends and the output ends of the two IGBT tubes are respectively connected with two output ends G1/E1 and G2/E2 of the first control chip.
The output end of the half-bridge inverter circuit is connected with two ends of a primary coil of a main transformer T1, and two groups of secondary coils of the main transformer T1 are connected with an output rectifying circuit.
The reverse end of the secondary coil 1 is connected with the same-direction end of the secondary coil 2, and is connected to an output end of the inverter welding machine circuit through an output current sampling resistor RS 1.
The equidirectional end of the secondary coil 1 and the reverse end of the secondary coil 2 are respectively connected with two input ends of an output rectifying circuit to form full-wave rectification.
The output rectifying circuit comprises two diode combinations D1 and D2, and the diode combination comprises two parallel diodes.
Detailed description of the invention
The utility model discloses an contravariant welding machine circuit still includes switching power supply, as shown in fig. 2, switching power supply includes switching power supply transformer T4, and switching power supply transformer T4's primary coil's one end provides power supply by the VCC and connects, and the other end connects switching power supply chip's DRAIN end.
The multiple secondary windings of the switching power transformer T4 provide power outputs of different voltage values after rectification and filtering.
The chip U7 and the peripheral circuit thereof form a feedback circuit, and the change of the output voltage is fed back to the switching power supply chip.
Detailed description of the invention
The utility model discloses an contravariant welding machine circuit still includes IGBT drive circuit for IGBT work among the drive half-bridge inverter circuit, including IGBT driving transformer, as shown in fig. 3, including IGBT driving transformer T3, IGBT driving transformer T3's two secondary coils pass through the circuit and connect IGBT pipe Q1 respectively, G1/E1, G2/E2 end of Q2, give IGBT pipe Q1, Q2 work drive signal, the OUTA end is connected the field effect tube after the circuit and is closed VT1A, the one end of connecting the primary coil behind VT 1B; the OUTB terminal is connected with the other end of the primary coil after being connected with field effect tube combinations VT2A and VT2B through a circuit.
Detailed description of the invention
The utility model discloses a circuit board of an inverter welding machine circuit, as shown in figures 4, 5, 6, 7 and 8, wherein figure 4 is a schematic structural diagram of the front side of the circuit board of the inverter welding machine; FIG. 5 is a schematic view of the reverse side of the circuit board of the inverter welder; fig. 6, 7 and 8 are schematic diagrams of element distribution.
The power switch, the first rectifying circuit, the filter circuit, the half-bridge inverter circuit, the transformer, the switching power transformer and the IGBT driving transformer of the inverter welding machine circuit are distributed at the upper left corner of the circuit board, and the secondary side of the transformer, the auxiliary coil, the second rectifying circuit and the filter inductor of the inverter welding machine circuit are distributed at the lower left corner and the lower right corner of the circuit board; the upper right corner of the circuit board is distributed with a low-electricity circuit part which comprises a transformer secondary circuit and a time sequence control circuit.
Two electrolytic capacitors of the filter circuit are arranged side by side, radiating fins are arranged on the upper side and the lower side of the two electrolytic capacitors, two IGBT tubes in the first rectifying circuit and the half-bridge inverter circuit are arranged on the outer side of the upper radiating fins, the two IGBT tubes are arranged side by side, and the first rectifying circuit is arranged above the two IGBT tubes.
The IGBT driving transformer is arranged above one IGBT tube.
The main transformer is arranged on one side of the lower radiator, the control circuit is arranged on the control circuit board, and the control circuit board and the main transformer are arranged in parallel.
The switch power supply transformer is positioned on the other side of the control circuit board and is vertical to the control circuit board.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (10)
1. An inverter welding machine circuit which is characterized in that: the power supply comprises a power switch, a voltage change-over switch, a first rectifying circuit, a filter circuit, a half-bridge inverter circuit, a transformer, a second rectifying circuit, a filter inductor, a mutual inductor and a control circuit, wherein the input end of the power switch is connected with a power frequency alternating current input end, one end of the output end is connected with one input end of the first rectifying circuit, and the other end of the output end is connected with the middle end of the voltage change-over switch; the first open end of the voltage change-over switch is connected with the other input end of the first rectifying circuit, and the second open end of the voltage change-over switch is connected with the middle end of the filter circuit; two input ends of the filter circuit are connected with two output ends of the first rectifying circuit; the half-bridge inverter circuit is connected with the filter circuit in parallel, the control end of the half-bridge inverter circuit is connected with the control circuit, the output of the half-bridge inverter circuit is connected with the primary coil of the transformer, and two ends of the secondary coil 1 and two ends of the secondary coil 2 of the transformer are connected with the second rectifying circuit; one output end of the second rectifying circuit is connected with the positive output end of the inverter welding machine circuit after passing through the filter inductor, and the other output end of the second rectifying circuit is connected with the negative output end of the inverter welding machine circuit; the primary of the mutual inductor is connected with the primary of the transformer, and the primary of the mutual inductor is connected with the control circuit.
2. The inverter welder circuit of claim 1, characterized in that: the power supply circuit is characterized by further comprising a relay, one end of a relay coil is connected with the control circuit, the other end of the relay coil is connected with a power supply end, and two switch ends of the relay are connected with the negative output end of the first rectifying circuit and the negative end of the filter circuit in series.
3. The inverter welder circuit of claim 1, characterized in that: the control circuit comprises a first control chip and a second control chip, a first output group of the first control chip is connected with the direct current motor through a common mode coil, a second output group is connected with a cold spot movable wire feeding, and a third output group is connected with a gun switch; the first output group of the second control chip is connected with a power indicator, the second output group is connected with a protection indicator, the third output group is connected with welding voltage regulation, and the fourth output group is connected with wire feeding speed regulation.
4. The inverter welder circuit of claim 1, characterized in that: the power supply also comprises a switching power supply, which is used for providing the isolated low-voltage power supply for the product and comprises a switching power supply transformer, a switching power supply chip, a switching power supply feedback circuit and a switching power supply output circuit.
5. The inverter welder circuit of claim 1, characterized in that: the half-bridge inverter circuit also comprises an IGBT driving circuit, wherein the IGBT driving circuit is used for driving the IGBT in the half-bridge inverter circuit to work and comprises an IGBT driving transformer.
6. The utility model provides a circuit board of contravariant welding machine circuit which characterized in that: the power switch, the first rectifying circuit, the filter circuit, the half-bridge inverter circuit, the transformer, the switching power transformer and the IGBT driving transformer of the inverter welding machine circuit are distributed at the upper left corner of the circuit board, and the transformer secondary coil, the second rectifying circuit and the filter inductor of the inverter welding machine circuit are distributed at the lower left corner and the lower right corner of the circuit board; the upper right corner of the circuit board is distributed with a low-voltage circuit part which comprises a transformer secondary circuit and a time sequence control circuit.
7. The circuit board of the inverter welder circuit according to claim 6, characterized in that: two electrolytic capacitors of the filter circuit are arranged side by side, radiators are arranged on the upper side and the lower side of the two electrolytic capacitors, a first rectifying circuit and two IGBT tubes in a half-bridge inverter circuit are arranged on the outer side of the upper radiator, the two IGBT tubes are arranged side by side, and the first rectifying circuit is arranged above the two IGBT tubes; and an output fast recovery diode device is arranged on the outer side of the lower radiator.
8. The circuit board of the inverter welder circuit according to claim 6, characterized in that: the IGBT driving transformer is arranged above one IGBT tube.
9. The circuit board of the inverter welder circuit according to claim 6, characterized in that: the main transformer is arranged on one side of the lower radiator, the control circuit is arranged on the control circuit board, and the control circuit board and the main transformer are arranged in parallel.
10. The circuit board of the inverter welder circuit according to claim 9, characterized in that: the switching power supply transformer is positioned on the other side of the control circuit board and is vertically arranged with the control circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922470979.XU CN211804321U (en) | 2019-12-31 | 2019-12-31 | Inverter welding machine circuit and circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922470979.XU CN211804321U (en) | 2019-12-31 | 2019-12-31 | Inverter welding machine circuit and circuit board |
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| Publication Number | Publication Date |
|---|---|
| CN211804321U true CN211804321U (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922470979.XU Active CN211804321U (en) | 2019-12-31 | 2019-12-31 | Inverter welding machine circuit and circuit board |
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| CN (1) | CN211804321U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846451A (en) * | 2020-12-26 | 2021-05-28 | 上海沪工焊接集团股份有限公司 | High-frequency control circuit PCB layout method for welding machine |
-
2019
- 2019-12-31 CN CN201922470979.XU patent/CN211804321U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112846451A (en) * | 2020-12-26 | 2021-05-28 | 上海沪工焊接集团股份有限公司 | High-frequency control circuit PCB layout method for welding machine |
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