CN206343741U - Welding machine power supply circuit - Google Patents
Welding machine power supply circuit Download PDFInfo
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- CN206343741U CN206343741U CN201621431513.9U CN201621431513U CN206343741U CN 206343741 U CN206343741 U CN 206343741U CN 201621431513 U CN201621431513 U CN 201621431513U CN 206343741 U CN206343741 U CN 206343741U
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Abstract
The utility model is related to a kind of welding machine power supply circuit, wherein the first input end of inverter circuit is connected with the first output end of current rectifying and wave filtering circuit and the input of auxiliary power supply circuit, second input is connected with the second output end of current rectifying and wave filtering circuit, and output end is connected with the simple winding of transformer；The output end of inverter control circuit is connected with the 3rd input of inverter circuit；First output end of auxiliary power supply circuit is connected with the first input end of inverter control circuit；First output end in secondary power loop is connected with the second input of inverter control circuit, and the second output end is connected with the 3rd input of inverter control circuit, and secondary power winding and the simple winding in secondary power loop are coupled.Above-mentioned welding machine power supply circuit, in start, is powered to inverter control circuit by auxiliary power supply circuit, after powering, the alternating current that welding machine is inputted is converted into direct current to be powered to inverter control circuit by transformer, simple in construction, with low cost.
Description
Technical field
The utility model is related to circuit design field, more particularly to a kind of welding machine power supply circuit.
Background technology
Welding machine is the visual plant in production and processing field, across multiple skills such as welding procedure, electric arc and power electronics
Art field.It is increasingly mature with inversion manual arc welder power technology, due to its relative to traditional welding machine small volume, it is lightweight and
Many advantages, such as energy-conservation, it is also more and more wider using scope.The inverter type welder produced and sold in the market is all opened using power
Powered-down source provides power supply for complete machine control circuit, and cost is higher.
Utility model content
Based on this, it is necessary to provide a kind of welding machine power supply circuit, carried using the input power of welding machine for welding machine control circuit
Power supply energy, cost is low.
A kind of welding machine power supply circuit, including：
Current rectifying and wave filtering circuit, the input termination power of the current rectifying and wave filtering circuit；
Inverter circuit, the first input end of the inverter circuit is connected with the first output end of the current rectifying and wave filtering circuit,
Second input of the inverter circuit is connected with the second output end of the current rectifying and wave filtering circuit, the output end of the inverter circuit
It is connected with the simple winding of transformer；
Inverter control circuit, the output end of the inverter control circuit is connected with the 3rd input of the inverter circuit；
Auxiliary power supply circuit, the input of the auxiliary power supply circuit is connected with the first output end of the current rectifying and wave filtering circuit
Connect, the first output end of the auxiliary power supply circuit is connected with the first input end of the inverter control circuit；
Secondary power loop, the secondary power loop include secondary power winding, the secondary power winding with it is described simple
Winding is coupled, and first output end in the secondary power loop is connected with the second input of the inverter control circuit, should
Second output end in secondary power loop is connected with the 3rd input of the inverter control circuit.
Above-mentioned welding machine power supply circuit, in starting up, is powered by auxiliary power supply circuit to inverter control circuit, and
After start, the alternating current that welding machine is inputted is converted to be powered to inverter control circuit by direct current by transformer, structure letter
It is single, it is with low cost.
In one of the embodiments, the current rectifying and wave filtering circuit includes：
Rectification unit, the input termination power of the rectification unit；
Filter unit, the first end of the filter unit and the first output end and the inverter circuit of the rectification unit
First input end be connected, the second end of the filter unit and the second output end of the rectification unit and inversion electricity
Second input on road is connected.
In one of the embodiments, in addition to：
Booster circuit, the input of the booster circuit is connected with the first output end of the rectification unit, boosting electricity
The output end on road is connected with the first end of the filter unit；
Boost control circuit, the first output end of the boost control circuit is connected with the first control end of the booster circuit
Connect, the second output end of the boost control circuit is connected with the second control end of the booster circuit, the boost control circuit
First input end be connected with the second output end of the auxiliary power supply circuit, the second input of the boost control circuit with
First output end in the secondary power loop is connected, and the 3rd input and the secondary power of the boost control circuit are returned
Second output end on road is connected；
Backfeed loop, the first end of the backfeed loop is connected with the first end of the filter unit, the backfeed loop
Second end is connected with the second end of the filter unit, the feedback output end of the backfeed loop and the boost control circuit
4th input is connected.
In one of the embodiments, the booster circuit includes：
Energy-storage units, the first end of the energy-storage units is connected with the first output end of the rectification unit, the energy storage list
Second end of member is connected with the first end of the filter unit；
BOOST booster circuits, the input of the BOOST booster circuits is connected with the first end of the energy-storage units, should
The output end of BOOST booster circuits is connected with the second end of the energy-storage units, the first control end of the BOOST booster circuits
It is connected with the first output end of the boost control circuit, the second control end of the BOOST booster circuits is controlled with the boosting
Second output end of circuit processed is connected.
In one of the embodiments, the BOOST booster circuits include inductance, the second diode and switching tube, institute
State the first end of inductance with the first output end of the rectification unit to be connected, the second end of the inductance, the switching tube
The positive input of first end and the diode is connected, the reverse input end of the diode and the energy-storage units
Second end is connected, and the second end of the switching tube is connected with the first output end of the boost control circuit, the switch
3rd end of pipe is connected with the second output end of the boost control circuit.
In one of the embodiments, the backfeed loop includes first resistor and second resistance, the first resistor
First end is connected with the first end of the filter unit, the second end of the first resistor, the first end of the second resistance
And the 4th input of the boost control circuit is connected, the of the second end of the second resistance and the filter unit
Two ends are connected.
In one of the embodiments, the secondary power loop also includes the 3rd diode, the 4th diode and the 4th
Electric capacity, the first tap of the secondary power winding is connected with the positive input of the 3rd diode, the secondary power around
Second tap of group is connected with the positive input of the 4th diode, the centre tap of the secondary power winding and institute
State the 4th electric capacity the second end be connected after be grounded, the reverse input end of the 3rd diode, the 4th diode it is anti-
It is connected to input with the first end of the 4th electric capacity, first end and the inverter control circuit of the 4th electric capacity
Second input is connected, and the second end of the 4th electric capacity is connected with the 3rd input of the inverter control circuit.
In one of the embodiments, the rectification unit be three phase full bridge rectification unit, three-phase half-controlled rectification unit or
Three-phase fully-controlled rectification unit.
In one of the embodiments, in addition to 3rd resistor, the first end of the 3rd resistor and rectifying and wave-filtering electricity
First output end on road is connected, and the second end of the 3rd resistor is connected with the input of the auxiliary power supply circuit.
In one of the embodiments, in addition to：
At least one secondary output loop, the secondary output loop includes secondary output winding, secondary output winding and
The simple winding, the secondary power winding are coupled.
Brief description of the drawings
Fig. 1 is the circuit diagram of welding machine power supply circuit in an embodiment；
Fig. 2 is the output waveform figure of inverter circuit in embodiment illustrated in fig. 1；
Fig. 3 is the circuit diagram of welding machine power supply circuit in another embodiment.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is used only for explaining
The utility model, is not used to limit the utility model.
Before describing in detail according to embodiment of the present utility model, it should be noted that, described embodiment mainly exists
In the combination of step and the system component related to welding machine power supply circuit.Therefore, said system component and method and step exist
Showed, and merely illustrated with understanding embodiment of the present utility model in position by ordinary symbol in accompanying drawing
Relevant details, in order to avoid because obviously those are thin for having benefited from those of ordinary skill in the art of the present utility model
Section has obscured disclosure of the present utility model.
Herein, such as left and right, upper and lower, front and rear, and first and second etc relational terms are used merely to area
Divide an entity or action and another entity or action, and not necessarily require or imply any between this entity or action
Actual this relation or order.Term " comprising ", "comprising" or any other variant are intended to including for nonexcludability, by
This causes the process, method, article or the equipment that include a series of key elements not only to include these key elements, but also comprising not bright
Other key elements really listed, or be this process, method, article or the intrinsic key element of equipment.
Refer to shown in Fig. 1, Fig. 1 is the circuit diagram of welding machine power supply circuit in an embodiment, in this embodiment, the welding machine
Power supply circuit can include current rectifying and wave filtering circuit 100, inverter circuit 200, inverter control circuit 400, auxiliary power supply circuit 300,
Secondary power loop 500 and at least one secondary output loop 600.
Wherein as shown in figure 1, the input termination power of current rectifying and wave filtering circuit 100.Wherein, power supply can be single-phase 110V,
Single-phase 220V, single-phase 380V, three-phase 220V, three-phase 380V or three-phase 440V power supply or generator etc..By whole
After stream filtering, sinusoidal ac is converted to DC supply input to inverter circuit 200, it is assumed that the size of the direct current is VCC herein.
The first input end of inverter circuit 200 is connected with the first output end of current rectifying and wave filtering circuit 100, inverter circuit
200 the second input is connected with the second output end of current rectifying and wave filtering circuit 100, the 3rd input of inverter circuit 200 with
The output end of inverter control circuit 400 is connected, and the output end of inverter circuit 200 is connected with transformer T simple winding N.
DC inverter after rectification is output after alternating current by the inverter circuit 200, and inverter control circuit 400 is by exporting PWM
Signal controls inverter circuit 200, to cause the output frequency of inverter circuit 200 as 50Hz~60Hz, and amplitude is VCC exchange
Square-wave signal, specifically may refer to shown in Fig. 2, so as to export electric energy to secondary power loop 500 by transformer T, with
Input electric energy is provided to secondary power loop 500.Wherein, the inverter circuit 200 can be full bridge inverter 200, transformer T
Can be power frequency step-down transformer, its working frequency is 50Hz~60Hz.
The input of auxiliary power supply circuit 300 is connected with the first output end of current rectifying and wave filtering circuit 100, auxiliary power supply electricity
First output end on road 300 is connected with the first input end of inverter control circuit 400.The auxiliary power supply circuit 300 can be
When welding machine is opened, power, as shown in figure 1, the auxiliary power supply circuit 300 is when welding machine is opened, that is, lead to inverter control circuit 400
The filtered direct current VCC of over commutation triggers the auxiliary power supply circuit 300 and worked.
Secondary power loop 500 includes secondary power winding N3, secondary power winding N3It is coupled with simple winding N, it is secondary
First output end of current supply circuit 500 is connected with the second input of inverter control circuit 400, secondary power loop 500
Second output end is connected with the 3rd input of inverter control circuit 400.After after welding machine startup, transformer T outputs electric energy is extremely
Secondary, is exported direct current to power to inverter control circuit 400 by secondary power loop 500.
Secondary output loop 600 includes secondary output winding, secondary output winding and simple winding N, secondary power winding
N3Be coupled, the secondary output loop 600 can normal output current, to provide the output of welding machine.
Above-mentioned welding machine power supply circuit, in starting up, is supplied by auxiliary power supply circuit 300 to inverter control circuit 400
Electricity, and after powering, the alternating current that welding machine is inputted is converted to so as to inverter control circuit 400 by direct current by transformer T
Power supply, it is simple in construction, it is with low cost.
In one of the embodiments, current rectifying and wave filtering circuit 100 can include rectification unit 110 and filter unit.Wherein
The input termination power of rectification unit 110.Rectification unit 110 can be three phase full bridge rectification unit, three-phase half-controlled rectification unit
Or three-phase fully-controlled rectification unit.The first end of filter unit and the first output end of rectification unit 110 and inverter circuit 200
First input end is connected, the second end of the filter unit and the second output end of rectification unit 110 and inverter circuit 200
Second input is connected.The filter unit can be the first electric capacity C in one of the embodiments1, first electric capacity C1Electricity
Capacitance is generally large, first electric capacity C1It can be electrochemical capacitor, ceramic condenser etc., not limit first electric capacity C herein1Class
Type.
In one of the embodiments, in addition to 3rd resistor R3, 3rd resistor R3First end and current rectifying and wave filtering circuit
100 the first output end is connected, 3rd resistor R3The second end be connected with the input of auxiliary power supply circuit 300, with
Just triggering auxiliary power supply circuit 300 is powered when welding machine is opened to welding machine control circuit.
In one of the embodiments, secondary power loop 500 is a full bridge rectifier, and it can specifically include the 3rd
Diode D3, the 4th diode D4With the 4th electric capacity C4, secondary power winding N3The first tap and the 3rd diode D3Forward direction
Input is connected, secondary power winding N3The second tap and the 4th diode D4Positive input be connected, secondary power
Winding N3Centre tap and the 4th electric capacity C4The second end be connected after be grounded, the 3rd diode D3Reverse input end, the 4th
Diode D4Reverse input end and the 4th electric capacity C4First end be connected, the 4th electric capacity C4First end and inversion control electricity
Second input on road 400 is connected, the 4th electric capacity C4The second end be connected with the 3rd input of inverter control circuit 400
Connect.The secondary power loop 500 is to secondary power winding N3Output direct current supplies electricity to inverse after the alternating current progress full-wave rectification of output
Become control circuit 400 to be powered.
In above-described embodiment, when there is power input, DC input voitage VCC is produced after rectifying and wave-filtering, is passed through
3rd resistor R3Triggering auxiliary power supply circuit 300 is powered to inverter control circuit 400, and the generation of inverter control circuit 400 50Hz~
60Hz drive signal, it is 50Hz~60Hz to make the output frequency of inverter circuit 200, and amplitude is VCC ac square wave signal, specifically
It may refer to shown in Fig. 2, the ac square wave signal is linked into transformer T two ends, after decompression, it is exported back by first level
Secondary output winding N in road 6101With the secondary output winding N in second subprime output loop 6202Output, then by single-phase
Rectification circuit and the second electric capacity C2With the 3rd electric capacity C3After rectifying and wave-filtering, two groups of DC voltage VDD are obtained1/-VDD1And VDD2/-
VDD2.Other secondary power winding N3For the winding with tap, pass through the 3rd diode D3With the 4th diode D4The all-wave of composition
Rectifier circuit rectifies, then pass through the 4th electric capacity C4VD VDD is obtained afterwards3, to be powered to inverter control circuit 400, from
And causing the steady operation of inverter control circuit 400, the inverter control circuit 400 can also be according to the VD in addition
VDD3Feedback come by pwm signal control inverter circuit 200 ON time Ton, so as to stable DC output voltage
VDD3.In this embodiment, auxiliary power supply circuit 300 is only powered at power on initial stage to inverter control circuit 400, treats direct current
Output voltage VDD3After stable, by VD VDD3Powered to inverter control circuit 400.
In one of the embodiments, refer to shown in Fig. 3, Fig. 3 is the circuit of welding machine power supply circuit in another embodiment
Figure, the welding machine power supply circuit except foregoing circuit constitute in addition to, can also include booster circuit 800, boost control circuit 700 with
And backfeed loop 900.The input of booster circuit 800 is connected with the first output end of rectification unit 110, booster circuit 800
Output end be connected with the first end of filter unit；The of first output end of boost control circuit 700 and booster circuit 800
One control end is connected, and the second output end of boost control circuit 700 is connected with the second control end of booster circuit 800, rises
The first input end of voltage-controlled circuit processed 700 is connected with the second output end of auxiliary power supply circuit 300, boost control circuit 700
The second input be connected with first output end in secondary power loop 500, the 3rd input of boost control circuit 700 with
Second output end in secondary power loop 500 is connected；The first end of backfeed loop 900 is connected with the first end of filter unit
Connect, the second end of backfeed loop 900 is connected with the second end of filter unit, the feedback output end of backfeed loop 900 and boosting
4th input of control circuit 700 is connected.In this embodiment, when there is power input, rectification unit is first passed around
Simple alternating current electric rectification is direct current by 110, then raises the voltage of the direct current by booster circuit 800, to give inversion electricity
Road 200 provides input, so that inverter circuit 200 can be with normally-open.
In one of the embodiments, the booster circuit 800 can include energy-storage units and BOOST booster circuits, energy storage
The first end of unit is connected with the first output end of rectification unit 110, the second end of energy-storage units and the first of filter unit
End is connected, and the input of BOOST booster circuits is connected with the first end of energy-storage units, the output end of BOOST booster circuits
It is connected with the second end of energy-storage units, the first control end of BOOST booster circuits and the first output of boost control circuit 700
End is connected, and the second control end of BOOST booster circuits is connected with the second output end of boost control circuit 700.In the reality
Apply in example, energy-storage units can be the first diode D1, when there is power input, after over commutation, direct current by this
One diode D1To the first electric capacity C1Charging, passes through 3rd resistor R3Triggering auxiliary power supply circuit 300 works, so that the auxiliary is supplied
Circuit 300 can provide electric energy to boost control circuit 700 and inverter control circuit 400, the boost control circuit 700 so as to
It can work to control the work of the BOOST booster circuits.
In one of the embodiments, BOOST booster circuits include inductance L1, the second diode D2And switching tube Q1, electricity
Feel L1First end be connected with the first output end of rectification unit 110, inductance L1The second end, switching tube Q1First end with
And the positive input of diode is connected, the second diode D2Reverse input end be connected with the second end of energy-storage units,
Switching tube Q1The second end be connected with the first output end of boost control circuit 700, switching tube Q1The 3rd end and boosting rectifier control
Second output end of circuit 700 is connected.In this embodiment, after rectification unit 110, sinusoidal ac is changed into direct current
Electricity, the voltage that boost control circuit 700 is fed back by feedback circuit exports pwm control signal with controlling switch pipe Q1Conducting
And disconnection, as switching tube Q1During conducting, inductance L1Energy storage, as switching tube Q1During disconnection, inductance L1Pass through the second diode D2To
One electric capacity C1Electric discharge, so as to which VCC to be increased to more than 1.414 times of maximum input voltage some value, after causing
Continuous inverter circuit 200 can be with normally.In one of the embodiments, switching tube Q1Can be metal-oxide-semiconductor etc..
In one of the embodiments, backfeed loop 900 can include first resistor R1With second resistance R2, first resistor
R1First end be connected with the first end of filter unit, first resistor R1The second end, second resistance R2First end and liter
4th input of voltage-controlled circuit processed 700 is connected, second resistance R2The second end be connected with the second end of filter unit.
In order that those skilled in the art fully realize the welding machine charging circuit being previously mentioned in above-described embodiment, herein to scheme
Illustrate the operation principle of the welding machine charging circuit exemplified by 3 illustrated embodiments：
Joint AC first1, joint AC2With joint AC3The single-phase or three-phase input line of any combination is accessed, power on is led to
Sinusoidal ac is become direct current by over commutation unit 110, then the first diode D1To the first electric capacity C1Charging so that first
Electric capacity C1The voltage of first end is VCC, so that voltage VCC can pass through 3rd resistor R3Come trigger auxiliary power supply circuit 300 to
Inverter control circuit 400 and boost control circuit 700 are powered, so that boost control circuit 700 works so that BOOST boosts
Circuit works, by first resistor R1With second resistance R2The backfeed loop 900 of composition after VCC partial pressures, will feed back to boosting rectifier control electricity
Road 700, the boost control circuit 700 can change the pwm control signal of its output, to control to switch in BOOST booster circuits
Pipe Q1Conducting and disconnection, as switching tube Q1During conducting, inductance L1Charging, to store electric energy, as switching tube Q1During shut-off, inductance L1
Pass through the second diode D2To the first electric capacity C1Electric discharge, to raise VCC voltage, so that VCC voltage is more than power supply most
1.414 times of big input voltage.The inverter circuit 200 of the control of inverter control circuit 400 simultaneously works, and exports inverter circuit 200
Frequency is the ac square wave signal that 50Hz~60Hz, amplitude are VCC, and the cycle of the ac square wave signal is 20ms (respective frequencies
For 50Hz)~16.7ms (respective frequencies are 60Hz), its ON time is by the control of inverter control circuit 400, the ac square wave
Signal is inputted to transformer T source electrode, after decompression, passes through the secondary output winding N in first level output loop 6101
With the secondary output winding N in second subprime output loop 6202After output, pass through single phase rectifier circuit and the second electric capacity C2,
Three electric capacity C3Rectifying and wave-filtering, obtain two groups of output DC voltage VDD1/-VDD1And VDD2/-VDD2, secondary charging winding N3Band
There is tap, it passes through the 3rd diode D3With the 4th diode D4The full-wave rectifying circuit rectification of composition and the 4th electric capacity C4Filtering
VD VDD is obtained afterwards3, VD VDD3Powered to inverter control circuit 400 and boost control circuit 700,
So that welding machine stable charging circuit works, while inverter control circuit 400 can also be according to VD VDD3Feedback,
The ON time Ton of inverter circuit 200 is controlled by pwm control signal, with stable DC output voltage VDD3。
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and it describes more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of welding machine power supply circuit, it is characterised in that including：
Current rectifying and wave filtering circuit, the input termination power of the current rectifying and wave filtering circuit；
Inverter circuit, the first input end of the inverter circuit is connected with the first output end of the current rectifying and wave filtering circuit, and this is inverse
The second input for becoming circuit is connected with the second output end of the current rectifying and wave filtering circuit, the output end of the inverter circuit and change
The simple winding of depressor is connected；
Inverter control circuit, the output end of the inverter control circuit is connected with the 3rd input of the inverter circuit；
Auxiliary power supply circuit, the input of the auxiliary power supply circuit is connected with the first output end of the current rectifying and wave filtering circuit,
First output end of the auxiliary power supply circuit is connected with the first input end of the inverter control circuit；
Secondary power loop, the secondary power loop includes secondary power winding, the secondary power winding and the simple winding
It is coupled, first output end in the secondary power loop is connected with the second input of the inverter control circuit, the secondary
Second output end of current supply circuit is connected with the 3rd input of the inverter control circuit.
2. welding machine power supply circuit according to claim 1, it is characterised in that the current rectifying and wave filtering circuit includes：
Rectification unit, the input termination power of the rectification unit；
The of filter unit, the first output end of the first end of the filter unit and the rectification unit and the inverter circuit
One input is connected, the second end of the filter unit and the second output end of the rectification unit and the inverter circuit
Second input is connected.
3. welding machine power supply circuit according to claim 2, it is characterised in that also include：
Booster circuit, the input of the booster circuit is connected with the first output end of the rectification unit, the booster circuit
Output end is connected with the first end of the filter unit；
Boost control circuit, the first output end of the boost control circuit is connected with the first control end of the booster circuit,
Second output end of the boost control circuit is connected with the second control end of the booster circuit, and the of the boost control circuit
One input is connected with the second output end of the auxiliary power supply circuit, the second input of the boost control circuit with it is described
First output end in secondary power loop is connected, the 3rd input and the secondary power loop of the boost control circuit
Second output end is connected；
Backfeed loop, the first end of the backfeed loop is connected with the first end of the filter unit, and the second of the backfeed loop
End is connected with the second end of the filter unit, the feedback output end of the backfeed loop and the 4th of the boost control circuit
Input is connected.
4. welding machine power supply circuit according to claim 3, it is characterised in that the booster circuit includes：
Energy-storage units, the first end of the energy-storage units is connected with the first output end of the rectification unit, the energy-storage units
Second end is connected with the first end of the filter unit；
BOOST booster circuits, the input of the BOOST booster circuits is connected with the first end of the energy-storage units, the BOOST
The output end of booster circuit is connected with the second end of the energy-storage units, the first control end of the BOOST booster circuits and institute
The first output end for stating boost control circuit is connected, the second control end and the boosting rectifier control electricity of the BOOST booster circuits
Second output end on road is connected.
5. welding machine power supply circuit according to claim 4, it is characterised in that the BOOST booster circuits include inductance, the
Two diodes and switching tube, the first end of the inductance are connected with the first output end of the rectification unit, the inductance
The second end, the positive input of the first end of the switching tube and the diode be connected, the diode it is reverse
Input is connected with the second end of the energy-storage units, the second end of the switching tube and the first of the boost control circuit
Output end is connected, and the 3rd end of the switching tube is connected with the second output end of the boost control circuit.
6. welding machine power supply circuit according to claim 3, it is characterised in that the backfeed loop includes first resistor and the
Two resistance, the first end of the first resistor is connected with the first end of the filter unit, the second end of the first resistor,
4th input of the first end of the second resistance and the boost control circuit is connected, and the second of the second resistance
End is connected with the second end of the filter unit.
7. the welding machine power supply circuit according to any one of claim 1 to 6, it is characterised in that the secondary power loop is also
Including the 3rd diode, the 4th diode and the 4th electric capacity, the first tap and the 3rd diode of the secondary power winding
Positive input is connected, and the second tap of the secondary power winding is connected with the positive input of the 4th diode
Connect, the centre tap of the secondary power winding is grounded after being connected with the second end of the 4th electric capacity, the three or two pole
The reverse input end of pipe, the reverse input end of the 4th diode are connected with the first end of the 4th electric capacity, and described
The first end of four electric capacity is connected with the second input of the inverter control circuit, the second end of the 4th electric capacity with it is described
3rd input of inverter control circuit is connected.
8. according to any one of claim 2 to the 6 welding machine power supply circuit, it is characterised in that the rectification unit is that three-phase is complete
Bridge rectification unit, three-phase half-controlled rectification unit or three-phase fully-controlled rectification unit.
9. the welding machine power supply circuit according to any one of claim 2 to 6, it is characterised in that also including 3rd resistor, this
The first end of three resistance is connected with the first output end of the current rectifying and wave filtering circuit, the second end of the 3rd resistor with it is described auxiliary
The input of power supply circuit is helped to be connected.
10. the welding machine power supply circuit according to any one of claim 1 to 6, it is characterised in that also include：
At least one secondary output loop, the secondary output loop includes secondary output winding, secondary output winding with it is described
Simple winding, the secondary power winding are coupled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621431513.9U CN206343741U (en) | 2016-12-23 | 2016-12-23 | Welding machine power supply circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621431513.9U CN206343741U (en) | 2016-12-23 | 2016-12-23 | Welding machine power supply circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108400637A (en) * | 2018-03-23 | 2018-08-14 | 无锡全裕电子科技有限公司 | A kind of portable square wave charging system |
| CN108429326A (en) * | 2018-03-23 | 2018-08-21 | 无锡全裕电子科技有限公司 | A kind of portable square wave charging method |
| CN109047992A (en) * | 2018-09-20 | 2018-12-21 | 西安拓锋机电科技有限公司 | It efficiently cuts and carries economize on electricity control route |
| CN114221559A (en) * | 2021-12-14 | 2022-03-22 | 广东福德电子有限公司 | On-load power supply of excitation generator |
-
2016
- 2016-12-23 CN CN201621431513.9U patent/CN206343741U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400637A (en) * | 2018-03-23 | 2018-08-14 | 无锡全裕电子科技有限公司 | A kind of portable square wave charging system |
| CN108429326A (en) * | 2018-03-23 | 2018-08-21 | 无锡全裕电子科技有限公司 | A kind of portable square wave charging method |
| CN109047992A (en) * | 2018-09-20 | 2018-12-21 | 西安拓锋机电科技有限公司 | It efficiently cuts and carries economize on electricity control route |
| CN114221559A (en) * | 2021-12-14 | 2022-03-22 | 广东福德电子有限公司 | On-load power supply of excitation generator |
| CN114221559B (en) * | 2021-12-14 | 2023-09-22 | 广东福德电子有限公司 | On-load power supply of excitation generator |
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