CN109807435A - Inverter type welder and its protection control circuit - Google Patents
Inverter type welder and its protection control circuit Download PDFInfo
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- CN109807435A CN109807435A CN201811627989.3A CN201811627989A CN109807435A CN 109807435 A CN109807435 A CN 109807435A CN 201811627989 A CN201811627989 A CN 201811627989A CN 109807435 A CN109807435 A CN 109807435A
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Abstract
The present invention provides a kind of inverter type welder and its protection control circuit, protects control circuit, comprising: protection control module couples the sequential control circuit of inverter type welder, when protecting control module to be connected with sequential control circuit, makes sequential control circuit output low level；Power-on protection module; coupling power end and protection control module, when inverter type welder accesses power supply, control protection control module is connected with sequential control circuit; and after the predetermined amount of time of inverter type welder access power supply, control protection control module and sequential control circuit are disconnected；Power down protection module, coupling power end and protection control module, when the supply voltage of inverter type welder access is lower than scheduled voltage, control protection control module is connected with sequential control circuit；And manual protection module, coupling power end and protection control module, protection control module, which is controlled, in response to user's operation is connected with sequential control circuit.The reliability of present invention raising inverter type welder.
Description
Technical field
The present invention relates to electrical component, in particular to a kind of inverter type welder and its protection control circuit.
Background technique
With the development of inversion welding technique, arc welder is being used in household and industrial using more and more extensive
In often will appear and be just switched on power supply, power supply is unstable；Situations such as power supply power-fail or other exceptions, is to electronics device in inverter type welder
Part has an impact, to increase the probability that inverter type welder is damaged, while reducing the reliability of inverter type welder.
Summary of the invention
The purpose of the present invention is to provide a kind of inverter type welder and its protection control circuits, thus at least to a certain extent
Overcome above-mentioned technical problem caused by the limitation and defect due to the relevant technologies.
Other features and advantages of the invention will be apparent from by the following detailed description, or partially by the present invention
Practice and acquistion.
According to the first aspect of the invention, a kind of protection control circuit is provided, inverter type welder is applied to, comprising:
Protect control module, couple the sequential control circuit of the inverter type welder, when the protection control module with it is described
When sequential control circuit is connected, make the sequential control circuit output low level；
Power-on protection module, couple the inverter type welder power end and the protection control module, when the inversion weld
When machine accesses power supply, the power-on protection module controls the protection control module and is connected with the sequential control circuit, and
After the predetermined amount of time of inverter type welder access power supply, the power-on protection module control the protection control module with it is described
Sequential control circuit disconnects；
Power down protection module, couple the inverter type welder power end and the protection control module, when the inversion weld
When the supply voltage of machine access is lower than scheduled voltage, the power down protection module control the protection control module with it is described when
Sequence control circuit conducting；And
Manual protection module, couple the inverter type welder power end and the protection control module, the manual protection
Module controls the protection control module in response to user's operation and is connected with the sequential control circuit.
Optionally, the protection control module includes:
First end couples the sequential control circuit of the inverter type welder；
Second end, ground connection；
Third end；
4th end；
The control electrode of first switch transistor, the first switch transistor couples the third end, the first switch
The first pole of transistor couples the first end, and second pole of first switch transistor couples the second end, and described first opens
The control electrode for closing transistor controls the conducting of first pole and the second pole to be made when first pole and second pole are connected
The sequential control circuit exports low level；
First resistor, one end of the first resistor couple the second end, and the other end of the first resistor couples institute
State third end；
Second resistance, one end of the second resistance couple the other end of the first resistor, the second resistance it is another
One end couples the 4th end.
Optionally, the first switch transistor is triode, the control extremely described three of the first switch transistor
The base stage of pole pipe, the emitter of the extremely described triode of the first of the first switch transistor, the first switch transistor
The second extremely described triode collector.
Optionally, the power-on protection module includes:
5th end couples the power end of the inverter type welder；
6th end couples the third end of the protection control module；
First capacitor is coupled between the 5th end and the 6th end；
3rd resistor is coupled between the first capacitor and the 6th end.
Optionally, the predetermined amount of time is true according to the capacitance of the first capacitor and the resistance value of the 3rd resistor
It is fixed.
Optionally, the power down protection module includes:
7th end couples the power end of the inverter type welder；
8th end couples the 4th end of the protection control module；
9th end, ground connection；
One end of 4th resistance, the 4th resistance couples the 7th end；
First diode, the anode of the first diode couple the other end of the 4th resistance, the one or two pole
8th end described in the negative couplings of pipe；
One end of 5th resistance, the 5th resistance couples the 7th end；
Voltage-stabiliser tube, the other end of the 5th resistance described in the negative couplings of the voltage-stabiliser tube；
Second switch transistor, the control electrode of the second switch transistor couple the anode of the voltage-stabiliser tube, and described
Two the first poles of switching transistor couple the anode of the first diode, the second pole of second switch transistor coupling described the
Nine ends；
Second capacitor is coupled between the cathode of the voltage-stabiliser tube and the 9th end.
Optionally, the scheduled voltage is determined according to the pressure stabilizing value of the voltage-stabiliser tube.
Optionally, the second switch transistor is triode, the control extremely described three of the second switch transistor
The base stage of pole pipe, the emitter of the extremely described triode of the first of the second switch transistor, the second switch transistor
The second extremely described triode collector.
Optionally, the manual protection module includes:
Tenth end couples the power end of the inverter type welder；
Tenth one end couples the 4th end of the protection control module；
First switch is coupled between the tenth end and described tenth one end；
Second diode, second diode-coupled is between the first switch and described tenth one end.
According to another aspect of the invention, a kind of inverter type welder is also provided, comprising:
Main loop circuit；
Sequential control circuit, for providing pulse width modulation controlled to the main loop circuit；
Protection control circuit as described above.
Inverter type welder provided by the invention and its protection control circuit have the advantage that compared with prior art
By protecting the design of control circuit, protection control circuit can power on booting and input electricity in inverter type welder
Immediate Protective Effects are played when source power down or shutdown；Realize inverter type welder ability after powering on booting control power good
It can work and the quick closedown when input power power down or relatively low shutdown control power supply.Pass through protection control circuit as a result,
Design improves inverter type welder and quickly protects response when powering on booting and input power power down or shutdown, welds inversion
Machine work is stable, does not damage, and improves product quality, increases reliability and service life, promotes product market competition
Power.
Be further understood that feature and technology contents of the invention to be enabled, please refer to below in connection with it is of the invention specifically
Bright and attached drawing, but detailed description and attached drawing here is intended merely to illustrate the present invention, rather than to claim of the invention
Range makees any limitation.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is the schematic diagram of the inverter type welder of one embodiment of the invention；
Fig. 2 is the schematic diagram of the protection control circuit of one embodiment of the invention.
Fig. 3 is the schematic diagram of the protection control circuit of the specific embodiment of the invention.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.It is identical attached in figure
Icon note indicates same or similar structure, thus the detailed description that will omit them.
In addition, described feature, structure or characteristic can be incorporated in one or more implementations in any suitable manner
In example.In the following description, many details are provided to provide and fully understand to the embodiment of the present invention.However,
It will be appreciated by persons skilled in the art that technical solution of the present invention can be practiced without one in the specific detail or more
It is more, or can be using other structures, component, step, method etc..In other cases, known in being not shown in detail or describing
Structure, component or operation are to avoid fuzzy each aspect of the present invention.
It is the schematic diagram of the inverter type welder of one embodiment of the invention referring initially to Fig. 1, Fig. 1.Inverter type welder 100 includes leading back
Road circuit 110, sequential control circuit 130 and protection control circuit 140.
Inverter type welder 100 accesses network pressure input, main loop circuit 110 is connected, by sequential control circuit 130 to major loop
Circuit 110 carries out PWM pulse width modulation controlled, adjusts output power.Protection control circuit 140 play welding machine power on booting and
Protective effect when input power power down or shutdown.Wherein, main loop circuit 110 provides power supply electricity to sequential control circuit 130
Source 120.Main loop circuit 110 may include current rectifying and wave filtering circuit 111, inverter circuit 112 and output rectification circuit 113.
Inverter type welder accesses network pressure input, by current rectifying and wave filtering circuit 111, connects inverter circuit 112, inverter circuit 112
It is connected to transformer, the secondary side of transformer is connected to output rectification circuit 113, while current rectifying and wave filtering circuit 111 is powered in connection
Power supply 120, power supply 120 are that sequential control circuit 130 and protection control circuit 140 provide working power.Timing control electricity
Road 130 is connected to inverter circuit 112 and protection control circuit 140, is carried out by sequential control circuit 130 to inverter circuit 112
PWM pulse width modulation controlled adjusts output power, and protecting control circuit 140 to play, welding machine powers on booting and input power falls
Protective effect when electricity or shutdown.Current rectifying and wave filtering circuit 111 is used to the industrial-frequency alternating current that network pressure inputs becoming direct current, simultaneously
Energy storage is filtered by capacitor, provides stable DC for subsequent inverter circuit 112 and power supply 120.Inverter circuit
112, for direct current to be become the higher alternating current of frequency, realize frequency conversion inversion.Transformer is for becoming AC current-voltage
The AC current-voltage that product needs when working, while also realizing the effect that input terminal is isolated with output end loop.Output rectification
Circuit 113 is used to the high-frequency alternating current that transformer inputs being rectified into direct current electricity output.Power supply 120 is used to be control circuit
Accessory power supply when work is provided.Sequential control circuit 130 is used to carry out PWM pulse width modulation controlled for inverter circuit 112, adjusts
Output power, while inverter circuit 112 is controlled.
Fig. 1 is only the modularized circuit for schematically showing inverter type welder 100, and the present invention is not limited thereto.
It is the schematic diagram of the protection control circuit of one embodiment of the invention referring to Fig. 2, Fig. 2.Protect control circuit 140
Applied to inverter type welder 100 shown in FIG. 1.Protecting control circuit 140 includes protection control module 141, power-on protection module
142, power down protection module 143 and manual protection module 144.Protection control module 141 couples the timing control of the inverter type welder
Circuit (passing through the sequential control circuit of 131 connection figure of pin, 1 label 130) processed.When the protection control module 141 with it is described when
When sequence control circuit is connected, the sequential control circuit is made to export low level to the main loop circuit (Fig. 1 label 110).It opens
Machine protective module 142 couple the inverter type welder power end and the protection control module 141.When the inverter type welder accesses
When power supply, the power-on protection module 142 controls the protection control module 141 and is connected with the sequential control circuit, and
After the predetermined amount of time of the inverter type welder access power supply, the power-on protection module 142 controls the protection control module 141
It is disconnected with the sequential control circuit.Power down protection module 143 couples power end and the protection control of the inverter type welder
Module 141.When the supply voltage of inverter type welder access is lower than scheduled voltage, the power down protection module 143 is controlled
The protection control module 141 is connected with the sequential control circuit.Manual protection module 144 couples the electricity of the inverter type welder
Source and the protection control module 141.The manual protection module 144 controls the protection in response to user's operation and controls mould
Block 141 is connected with the sequential control circuit.
The present invention protects control circuit that can power in inverter type welder by the design of protection control circuit as a result,
Immediate Protective Effects are played when booting and input power power down or shutdown；It realizes inverter type welder and is powering on booting control
Could work after power good and when input power power down or shutdown control power supply it is relatively low when quick closedown.Pass through guarantor as a result,
The design of control circuit is protected, inverter type welder is improved and quickly protects sound when powering on booting and input power power down or shutdown
It answers, keeps inverter type welder work stable, do not damage, improve product quality, increase reliability and service life, promoted and produced
The product market competitiveness.
140 specific embodiment of protection control circuit provided by the invention is described below with reference to Fig. 3.
The protection control module 141 for protecting control circuit 140 includes the timing control electricity for coupling the inverter type welder
First end, the second end of ground connection, third end and the 4th end on road.Protection control circuit 140 further include first switch transistor Q1,
First resistor R1 and second resistance R2.
The control electrode coupling third end of the first switch transistor Q1, the first of the first switch transistor Q1
Pole couples the first end, and the second pole of the first switch transistor Q1 couples the second end, the first switch crystal
The control electrode of pipe Q1 controls the conducting of first pole and the second pole, when first pole and second pole are connected, makes described
Sequential control circuit exports low level to the main loop circuit (Fig. 1 label 110).One end coupling described the of first resistor R1
The other end at two ends, the first resistor R1 couples the third end.One end of second resistance R2 couples the first resistor R1
The other end, the other end of the second resistance R2 couples the 4th end.
In the present embodiment, the first switch transistor Q1 is triode, the control of the first switch transistor Q1
The base stage of the extremely described triode, the emitter of the first extremely described triode of the first switch transistor Q1, described
The collector of the extremely described triode of the second of one switching transistor Q1.First switch transistor, which can also be other, has switch
The transistor of function, it will not be described here.
The power-on protection module 142 for protecting control circuit 140 includes coupling the 5th end of the power end of the inverter type welder
And the 6th end at the third end of the coupling protection control module.Power-on protection module 142 further includes first capacitor C1 and third
Resistance R3.First capacitor C1 is coupled between the 5th end and the 6th end.3rd resistor R3 is coupled in the first capacitor C1
Between the 6th end.
Specifically, the power supply (VCC) of inverter type welder is to first capacitor C1 and 3rd resistor R3 in inverter type welder booting
It charges, the charging time is determined by the capacitance of first capacitor C1 and the resistance value size of 3rd resistor R3, in charging process,
3rd resistor R3 is supplied to the control electrode of first switch transistor Q1, and the first pole and the second pole of first switch transistor Q1 is led
It is logical, make the first end connection sequential control circuit for protecting control module 141, so that sequential control circuit exports low level.When one
After capacitor C1 voltage is full of, when both ends do not have electric current to flow through, first switch transistor Q1 is not turned on, and is not produced to sequential control circuit
It is raw to influence.Thus, it is possible to make inverter type welder that could work after powering on stabilization, it is ensured that booting moment is unable to output services.
Protect control circuit 140 the power down protection module 143 include couple the inverter type welder power end the
9th end at seven ends, the 8th end at coupling the 4th end for protecting control module and ground connection.Power down protection module 143 further includes
4th resistance R4, first diode D1, the 5th resistance R5, voltage-stabiliser tube Z1, second switch transistor Q2 and the second capacitor C2.
One end of 4th resistance R4 couples the 7th end.The anode of first diode D1 couples the 4th resistance R4's
The other end, the 8th end described in the negative couplings of the first diode D2.One end of 5th resistance R5 couples the 7th end.Surely
The other end of 5th resistance R5 described in the negative couplings of pressure pipe Z1.The control electrode of second switch transistor Q2 couples the voltage-stabiliser tube
First pole of the anode of Z1, the second switch transistor Q2 couples the anode of the first diode D1, the second switch
The second pole of transistor Q2 couples the 9th end.Second capacitor C2 be coupled in the voltage-stabiliser tube Z1 cathode and the 9th end it
Between.
In the present embodiment, the second switch transistor Q2 is triode, the control of the second switch transistor Q2
The base stage of the extremely described triode, the emitter of the first extremely described triode of the second switch transistor Q2, described
The collector of the extremely described triode of the second of two switching transistor Q2.Second switch transistor, which can also be other, has switch
The transistor of function, it will not be described here.
Specifically, pressure stabilizing value of the power down protection module 143 by adjusting voltage-stabiliser tube Z1, to set the power supply of inverter type welder
(VCC) it is protected when being lower than the pressure stabilizing value of voltage-stabiliser tube Z1, when VCC power supply is higher than the pressure stabilizing value of voltage-stabiliser tube Z1, voltage-stabiliser tube Z1 conducting,
Second switch transistor Q2 is set to work, when second switch transistor Q2 work, the positive terminal of first diode D1 is dragged down, and first
The first pole and the second pole of switching transistor Q1 is not turned on, and is not had an impact to sequential control circuit.When in inverter type welder operation
When input power power down or shutdown, VCC power supply is lower suddenly, when VCC power supply is lower than the pressure stabilizing value of voltage-stabiliser tube Z1, voltage-stabiliser tube
Z1 is not turned on, and second switch transistor Q2 is made not work, when second switch transistor Q2 does not work, by VCC power supply, and the 4th
Resistance R4, first diode D1, second resistance R2 power to the control electrode of first switch transistor Q1, make first switch transistor
The work of Q1 fast conducting makes the first end connection sequential control circuit for protecting control module 141, so that sequential control circuit exports
Low level.
By adjusting the pressure stabilizing value threshold values of voltage-stabiliser tube Z1, thus it is possible to vary shield when VCC power supply is lower than how many volts.Example
Such as, the pressure stabilizing value of voltage-stabiliser tube Z1 is 13V, the Immediate Protective Effects when VCC power supply is lower than 13V.This protection power source threshold values can basis
Different safety circuits need corresponding adjustment.
The manual protection module 144 for protecting control circuit 140 includes coupling the tenth end of the power end of the inverter type welder
And the tenth one end at the 4th end of the coupling protection control module.Manual protection module 144 further includes first switch SW1 and
Two diode D2.First switch SW1 is coupled between the tenth end and described tenth one end.Second diode D2 is coupled in institute
It states between first switch SW1 and described tenth one end.
Specifically, cut-offfing to be protected by the first switch SW1 that manually controls manual protection module 144.When
When first switch SW1 is disconnected, the second diode D2 positive terminal is disconnected, and does not play protection at this time, when first switch SW1 closure, is led to
VCC power supply is crossed, first switch SW1, the second diode D2, second resistance R2 power to the control electrode of first switch transistor Q1,
Make first switch transistor Q1 ON operation, make the first end connection sequential control circuit for protecting control module 141, so that when
Sequence control circuit exports low level.
The present invention protects control circuit that can power in inverter type welder by the design of protection control circuit as a result,
Immediate Protective Effects are played when booting and input power power down or shutdown；It realizes inverter type welder and is powering on booting control
Could work after power good and when input power power down or shutdown control power supply it is relatively low when quick closedown.Pass through guarantor as a result,
The design of control circuit is protected, inverter type welder is improved and quickly protects sound when powering on booting and input power power down or shutdown
It answers, keeps inverter type welder work stable, do not damage, improve product quality, increase reliability and service life, promoted and produced
The product market competitiveness.
The present invention is described by above-mentioned related embodiment, however above-described embodiment is only to implement example of the invention.
It must be noted that the embodiment disclosed is not limiting as the scope of the present invention.On the contrary, do not depart from spirit of the invention and
It is changed and retouched made by range, belongs to scope of patent protection of the invention.
Claims (10)
1. a kind of protection control circuit, which is characterized in that be applied to inverter type welder, comprising:
Control module is protected, the sequential control circuit of the inverter type welder is coupled, when the protection control module and the timing
When control circuit is connected, make the sequential control circuit output low level；
Power-on protection module, couple the inverter type welder power end and the protection control module, when the inverter type welder connects
When entering power supply, the power-on protection module controls the protection control module and is connected with the sequential control circuit, and described
After inverter type welder accesses the predetermined amount of time of power supply, the power-on protection module controls the protection control module and the timing
Control circuit disconnects；
Power down protection module, couple the inverter type welder power end and the protection control module, when the inverter type welder connects
When the supply voltage entered is lower than scheduled voltage, the power down protection module controls the protection control module and the timing control
Circuit conducting processed；And
Manual protection module, couple the inverter type welder power end and the protection control module, the manual protection module
The protection control module is controlled in response to user's operation to be connected with the sequential control circuit.
2. protection control circuit according to claim 1, which is characterized in that the protection control module includes:
First end couples the sequential control circuit of the inverter type welder；
Second end, ground connection；
Third end；
4th end；
The control electrode of first switch transistor, the first switch transistor couples the third end, the first switch crystal
First pole of pipe couples the first end, and the second pole of the first switch transistor couples the second end, and described first opens
The control electrode for closing transistor controls the conducting of first pole and the second pole to be made when first pole and second pole are connected
The sequential control circuit exports low level；
First resistor, one end of the first resistor couple the second end, the other end coupling of the first resistor described the
Three ends；
Second resistance, one end of the second resistance couple the other end of the first resistor, the other end of the second resistance
Couple the 4th end.
3. protection control circuit according to claim 2, which is characterized in that the first switch transistor is triode,
The base stage of the extremely described triode of control of the first switch transistor, the first of the first switch transistor are extremely described
The emitter of triode, the collector of the extremely described triode of the second of the first switch transistor.
4. protection control circuit according to claim 2, which is characterized in that the power-on protection module includes:
5th end couples the power end of the inverter type welder；
6th end couples the third end of the protection control module；
First capacitor is coupled between the 5th end and the 6th end；
3rd resistor is coupled between the first capacitor and the 6th end.
5. protection control circuit according to claim 4, which is characterized in that the predetermined amount of time is according to first electricity
The resistance value of the capacitance of appearance and the 3rd resistor determines.
6. protection control circuit according to claim 2, which is characterized in that the power down protection module includes:
7th end couples the power end of the inverter type welder；
8th end couples the 4th end of the protection control module；
9th end, ground connection；
One end of 4th resistance, the 4th resistance couples the 7th end；
First diode, the anode of the first diode couple the other end of the 4th resistance, the first diode
8th end described in negative couplings；
One end of 5th resistance, the 5th resistance couples the 7th end；
Voltage-stabiliser tube, the other end of the 5th resistance described in the negative couplings of the voltage-stabiliser tube；
Second switch transistor, the control electrode of the second switch transistor couple the anode of the voltage-stabiliser tube, and described second opens
The first pole for closing transistor couples the anode of the first diode, the second pole coupling of the second switch transistor described the
Nine ends；
Second capacitor is coupled between the cathode of the voltage-stabiliser tube and the 9th end.
7. protection control circuit according to claim 6, which is characterized in that the scheduled voltage is according to the voltage-stabiliser tube
Pressure stabilizing value determine.
8. protection control circuit according to claim 6, which is characterized in that the second switch transistor is triode,
The base stage of the extremely described triode of control of the second switch transistor, the first of the second switch transistor are extremely described
The emitter of triode, the collector of the extremely described triode of the second of the second switch transistor.
9. protection control circuit according to claim 2, which is characterized in that the manual protection module includes:
Tenth end couples the power end of the inverter type welder；
Tenth one end couples the 4th end of the protection control module；
First switch is coupled between the tenth end and described tenth one end；
Second diode, second diode-coupled is between the first switch and described tenth one end.
10. a kind of inverter type welder characterized by comprising
Main loop circuit；
Sequential control circuit, for providing pulse width modulation controlled to the main loop circuit；
Protection control circuit as described in any one of claim 1 to 9.
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| CN201811627989.3A CN109807435B (en) | 2018-12-28 | 2018-12-28 | Inverter welding machine and protection control circuit thereof |
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| CN201811627989.3A CN109807435B (en) | 2018-12-28 | 2018-12-28 | Inverter welding machine and protection control circuit thereof |
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| CN112783031A (en) * | 2020-12-30 | 2021-05-11 | 中国科学院长春光学精密机械与物理研究所 | Soft instruction starting control and level signal isolation circuit system |
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| CN110625221A (en) * | 2019-09-23 | 2019-12-31 | 佛山耀立电气有限公司 | Method and device for storing abnormal power failure parameters during welding parameter adjustment and welding machine |
| CN112783031A (en) * | 2020-12-30 | 2021-05-11 | 中国科学院长春光学精密机械与物理研究所 | Soft instruction starting control and level signal isolation circuit system |
| CN112783031B (en) * | 2020-12-30 | 2021-12-17 | 中国科学院长春光学精密机械与物理研究所 | Soft instruction starting control and level signal isolation circuit system |
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