CN203062057U - Input default phase protection circuit for electric welding machine - Google Patents
Input default phase protection circuit for electric welding machine Download PDFInfo
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- CN203062057U CN203062057U CN 201320046977 CN201320046977U CN203062057U CN 203062057 U CN203062057 U CN 203062057U CN 201320046977 CN201320046977 CN 201320046977 CN 201320046977 U CN201320046977 U CN 201320046977U CN 203062057 U CN203062057 U CN 203062057U
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Abstract
The utility model relates to the technical field of electric welding machines and particularly relates to a protection circuit for an electric welding machine. The input default phase protection circuit for the electric welding machine comprises a power supply input end and a control output end, wherein the power supply input end is connected to a three-phase alternating current power grid after being connected with an input end of the electric welding machine, the control output end is connected with a control input end of a control circuit of the electric welding machine, the input default phase protection circuit for the electric welding machine further comprises a default phase detection circuit and a control level generation circuit, the control level generation circuit generates a corresponding control level at the control output end according to a detection result of the default phase detection circuit, and the control circuit of the electric welding machine controls the output of the electric welding machine through controlling the level. Due to the technical scheme, the input default phase protection circuit for the electric welding machine can indicate the input wiring condition of the electric welding machine and implements power-off protection during default phase, so that the electric welding machine can operate more safely.
Description
Technical field
The utility model relates to the electric welding machine technical field, is specifically related to a kind of electric welding machine holding circuit.
Background technology
Electric welding machine is that the high-voltage arc that utilizes the positive and negative terminal electric pole short circuit to produce comes the molten solder material, makes its a kind of electrical equipment of being combined with soldered material, and its essence is a high-power transformer.Electric welding machine commonly used mostly is three-phase ac electric welding machine, be provided with current rectifying and wave filtering circuit, inverter circuit, control circuit in it and the voltage-stabilized power supply of operating voltage is provided for control circuit, regulate the output of control electric welding machine by control circuit, the power output of the type electric welding machine is bigger, can satisfy the needs of most of occasion.
Three-phase ac electric welding machine in use, when causing phase shortage when taking place operating personnel when connecing power input line, to have few wiring cable or contact terminal to come in contact condition of poor, the operating current that complete machine bears will sharply become greatly, damages internal electronic component easily; The generation that can't in time discover the phase shortage situation owing to operating personnel continues to use electric welding machine, can cause the electric welding machine fault malfunctioning, causes the equipment damage when serious.
The utility model content
The purpose of this utility model is, a kind of electric welding machine input open-phase protection circuit is provided, and solves above technical problem.
The technical problem that the utility model solves can realize by the following technical solutions:
Electric welding machine input open-phase protection circuit, comprise a power input and a control output end, described power input be connected to the three-phase alternating current electrical network after the input of electric welding machine is connected, described control output end is connected with the control input end of the control circuit of electric welding machine, it is characterized in that, also comprise a lack detection circuit and a control level generative circuit, described control level generative circuit generates corresponding control level according to the testing result of described lack detection circuit in described control output end, and the control circuit of electric welding machine is exported control with described control level to electric welding machine;
Described lack detection circuit is made up of diode, optocoupler luminous end and voltage-stabiliser tube, and the two ends of described lack detection circuit connect the adjacent two-phase of three-phase alternating current electrical network, and electric current flows to voltage-stabiliser tube again after diode flows to the optocoupler luminous end, make that the optocoupler luminous end is luminous;
Described control level generative circuit is by the optocoupler light-receiving end, relay, transistor is formed, and employing direct current supply, described transistor is the triode of NPN type, after two described optocoupler light-receiving end series connection, the one end connects the high potential point, the other end connects described transistorized base stage, the ground connection behind the divider resistance of connecting between described transistorized base stage and the emitter stage, described transistorized colelctor electrode connects an end of described relay, the other end of described relay connects described high potential point, described relay adopts a closed type relay, an end ground connection of its normally-closed contact, and the other end is drawn the back and is constituted described control output end.
The utility model adopts electronic components such as diode, optocoupler, voltage-stabiliser tube, transistor and relay to make up lack detection circuit and control level generative circuit; the phase shortage that has realized the electric welding machine tie-in line detects and protection; optocoupler has the electrical isolation characteristic, makes open-phase protection circuit self have higher reliability.
In the utility model use, under the normal power supply situation, the conducting of optocoupler luminous end is luminous, also conducting after the light-receiving end induction, make and form voltage between transistorized base stage and the emitter stage and make the transistor forward biased conducting, make normally-closed contact disconnect after relay works on power, the control input end of electric welding machine control circuit is set to high level, the normally unloaded output of electric welding machine this moment; When phase shortage takes place when; arbitrary optocoupler luminous end can not get power supply; make the optocoupler light-receiving end disconnect; cause transistor zero to end partially; the control level generative circuit can't form the loop, and relay is not worked and made normally closed point remain closed, and the control input end of electric welding machine control circuit is set to low level; the electric welding machine no-output, thus the inner components and parts of protection electric welding machine are injury-free.
Also comprise an alarming device, described alarming device is series between described relay and the described high potential point, can indicate whether phase shortage of electric welding machine by described alarming device.
In the utility model use, after the control level generative circuit formed the loop, alarming device worked on power, in order to remind the current circuit working of user normal; Alarming device does not have alarm signal after electric welding machine starts, and then represents the input end of electric welding machine phase shortage.
Described alarming device adopts a buzzer or light emitting diode, preferably adopts light emitting diode.
Beneficial effect: owing to adopt technique scheme, the utility model can be indicated the input wires situation of electric welding machine, and carries out power-off protection when phase shortage, makes the electric welding machine operation safer.
Description of drawings
Fig. 1 is whole connection diagram of the present utility model;
Fig. 2 is structural representation of the present utility model.
The specific embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose with effect is easy to understand, below in conjunction with the further elaboration the utility model of concrete diagram.
With reference to Fig. 1; electric welding machine input open-phase protection circuit; comprise a power input; one end of power input and the A phase that is connected to the three-phase alternating current electrical network after the input of electric welding machine is connected; the B phase; the C phase; the other end is connected with lack detection circuit; lack detection circuit is by diode; voltage-stabiliser tube and optocoupler luminous end are formed; A and B are connected on the optocoupler luminous end U2A; the centre is in series with diode D10 and voltage-stabiliser tube D11; the A phase current flows into from the positive pole of diode D10; flow out mutually from B behind approach optocoupler luminous end U2A and the voltage-stabiliser tube D11 that oppositely is connected; C and B are connected to the luminous end U1A of another optocoupler; middle series diode D3 and voltage-stabiliser tube D4, the C phase current flows into from the positive pole of diode D3, flows out mutually from B behind approach optocoupler luminous end U1A and the reverse voltage-stabiliser tube D4 that is connected.Also comprise a control level generative circuit, the control level generative circuit is made up of optocoupler light-receiving end, divider resistance, transistor and relay, and is powered by the 24v voltage-stabilized power supply.Light-receiving end U2B, the U1B of two optocouplers and divider resistance R5, R10 series connection, other end connection+24v the potential point of R5, resistance R 10 is connected in parallel between the base stage and emitter stage of transistor Q1, the grounded emitter of transistor Q1, the end of the collector connection relay J of transistor Q1, the other end of relay J is connected in series behind the light emitting diode D13 with+24v potential point and is connected, relay J is a closed type relay, its normally closed ground connection, the end of contact K1 is drawn the back and is constituted control output end P, and control output end P connects the control circuit of electric welding machine.
The utility model adopts electronic devices and components such as diode, optocoupler, transistor, relay to form lack detection circuit and control level generative circuit; the power supply phase shortage that realizes electric welding machine detects and protection; optocoupler has the electrical isolation characteristic, makes open-phase protection circuit self have higher reliability.Under the normal power supply situation, the conducting of optocoupler luminous end is luminous, also conducting after the light-receiving end induction, make that thereby forming voltage between transistorized base stage and the emitter stage makes the transistor forward biased conducting, after working on power, relay make normally closed point disconnect, the control input end of electric welding machine control circuit is set to high level, the normally unloaded output of electric welding machine this moment; When phase shortage takes place when; it is not luminous that arbitrary optocoupler luminous end can not get power supply; make the optocoupler light-receiving end disconnect; cause transistor zero to end partially; the control level generative circuit can't form the loop, and relay is not worked and made normally closed point remain closed, and the control input end of electric welding machine control circuit is set to low level; the electric welding machine no-output, thus the inner components and parts of protection electric welding machine are injury-free.Make light emitting diode D13 also obtain power supply and luminous after the relay conducting, in order to remind the current power supply of user normal, the not luminous then expression of light emitting diode D13 input phase shortage after electric welding machine starts.
Fig. 2 is connected into connection diagram behind the electric welding machine circuit for the utility model; wherein; the input terminal of electric welding machine input open-phase protection circuit 6 and the input terminal of current rectifying and wave filtering circuit 1 are connected into AC network after matching and being connected; the output of current rectifying and wave filtering circuit 1 connects inverter circuit 2; the output of inverter circuit 2 connects electric welding machine transformation output circuit 3; the control input end of inverter circuit 2 connects control circuit 4, and the control input end of control circuit 4 connects electric welding machine input open-phase protection circuit 6.Control circuit 4 and electric welding machine open-phase protection circuit 6 provide electric energy work by accessory power supply.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. electric welding machine is imported open-phase protection circuit, comprise a power input and a control output end, described power input be connected to the three-phase alternating current electrical network after the input of electric welding machine is connected, described control output end is connected with the control input end of the control circuit of electric welding machine, it is characterized in that, also comprise a lack detection circuit and a control level generative circuit, described control level generative circuit generates corresponding control level according to the testing result of described lack detection circuit in described control output end, and the control circuit of electric welding machine is exported control with described control level to electric welding machine;
Described lack detection circuit is made up of diode, optocoupler luminous end and voltage-stabiliser tube, and the two ends of described lack detection circuit connect the adjacent two-phase of three-phase alternating current electrical network, and electric current flows to voltage-stabiliser tube again after diode flows to the optocoupler luminous end, make that the optocoupler luminous end is luminous;
Described control level generative circuit is by the optocoupler light-receiving end, relay, transistor is formed, and employing direct current supply, described transistor is the triode of NPN type, after two described optocoupler light-receiving end series connection, the one end connects the high potential point, the other end connects described transistorized base stage, the ground connection behind the divider resistance of connecting between described transistorized base stage and the emitter stage, described transistorized colelctor electrode connects an end of described relay, the other end of described relay connects described high potential point, described relay adopts a closed type relay, an end ground connection of its normally-closed contact, and the other end is drawn the back and is constituted described control output end.
2. electric welding machine input open-phase protection circuit according to claim 1 is characterized in that also comprise an alarming device, described alarming device is series between described relay and the described high potential point.
3. electric welding machine input open-phase protection circuit according to claim 2 is characterized in that described alarming device adopts a buzzer or light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320046977 CN203062057U (en) | 2013-01-28 | 2013-01-28 | Input default phase protection circuit for electric welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320046977 CN203062057U (en) | 2013-01-28 | 2013-01-28 | Input default phase protection circuit for electric welding machine |
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| Publication Number | Publication Date |
|---|---|
| CN203062057U true CN203062057U (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320046977 Expired - Fee Related CN203062057U (en) | 2013-01-28 | 2013-01-28 | Input default phase protection circuit for electric welding machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616548A (en) * | 2013-11-26 | 2014-03-05 | 上海通用重工集团有限公司 | Inverter welder output current detecting circuit and detecting method based on direct current signals |
| CN103809073A (en) * | 2014-02-19 | 2014-05-21 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of novel welding machine |
| CN104057181A (en) * | 2014-06-23 | 2014-09-24 | 上海威特力焊接设备制造股份有限公司 | Open-phase protection circuit for inverter welding machine |
| CN106975821A (en) * | 2017-03-30 | 2017-07-25 | 朱宣辉 | A kind of IGBT inverter type welders with floating voltage and a variety of protection control functions |
| CN107900491A (en) * | 2017-12-19 | 2018-04-13 | 宁波欧罗巴焊割科技有限公司 | A kind of welding machine open-phase protection control circuit |
-
2013
- 2013-01-28 CN CN 201320046977 patent/CN203062057U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616548A (en) * | 2013-11-26 | 2014-03-05 | 上海通用重工集团有限公司 | Inverter welder output current detecting circuit and detecting method based on direct current signals |
| CN103616548B (en) * | 2013-11-26 | 2015-12-30 | 上海通用重工集团有限公司 | A kind of output current of inverting welding machine testing circuit based on direct current signal and detection method |
| CN103809073A (en) * | 2014-02-19 | 2014-05-21 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of novel welding machine |
| CN103809073B (en) * | 2014-02-19 | 2017-01-25 | 山东润合焊接设备有限公司 | Phase loss and chassis grounding detecting device of welding machine |
| CN104057181A (en) * | 2014-06-23 | 2014-09-24 | 上海威特力焊接设备制造股份有限公司 | Open-phase protection circuit for inverter welding machine |
| CN106975821A (en) * | 2017-03-30 | 2017-07-25 | 朱宣辉 | A kind of IGBT inverter type welders with floating voltage and a variety of protection control functions |
| CN107900491A (en) * | 2017-12-19 | 2018-04-13 | 宁波欧罗巴焊割科技有限公司 | A kind of welding machine open-phase protection control circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20220128 |
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| CF01 | Termination of patent right due to non-payment of annual fee |