CN106141376A - The industrial frequency rectifying filtering circuitry of twin voltage inverter arc welding machine - Google Patents
The industrial frequency rectifying filtering circuitry of twin voltage inverter arc welding machine Download PDFInfo
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- CN106141376A CN106141376A CN201610711156.XA CN201610711156A CN106141376A CN 106141376 A CN106141376 A CN 106141376A CN 201610711156 A CN201610711156 A CN 201610711156A CN 106141376 A CN106141376 A CN 106141376A
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- relay
- industrial frequency
- circuit
- frequency rectifying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/09—Arrangements or circuits for arc welding with pulsed current or voltage
- B23K9/091—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits
- B23K9/093—Arrangements or circuits for arc welding with pulsed current or voltage characterised by the circuits the frequency of the pulses produced being modulatable
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Abstract
The invention discloses the industrial frequency rectifying filtering circuitry of a kind of twin voltage inverter arc welding machine, power grid voltage detection circuit input connects AC network, is used for detecting line voltage peak value, and power grid voltage detection circuit includes the first relay and the second relay；Line voltage switching circuit includes the first relay and the second relay a pair normally opened/normally-closed contact respectively；When power grid voltage detection circuit detects line voltage peak value less than 360V, the normally opened contact of the first relay and the normally opened contact of the second relay are turned on, and make industrial frequency rectifying filter circuit carry out full-bridge rectification；When power grid voltage detection circuit detects line voltage peak value higher than 360V, the normally opened contact of the first relay and the normally-closed contact of the second relay are turned on, and make industrial frequency rectifying filter circuit carry out Half bridge rectifier.The industrial frequency rectifying filter circuit of the present invention is all wave rectification, solves the problem that voltage doubling rectifing circuit electric capacity utilization rate is low under twin voltage state.
Description
Technical field
The present invention relates to the industrial frequency rectifying filtering circuitry of a kind of twin voltage inverter arc welding machine.
Background technology
At present, twin voltage AC220V/380V inverter type welder, employing voltage-multiplying circuit rectification it is substantially all when AC220V.Times
The essence of voltage rectifier is electric charge pump, need to use high voltage, the place of small area analysis at some, be frequently used voltage doubling rectifing circuit.
Voltage multiplying rectifier, can be relatively low alternating voltage, with pressure relatively low commutation diode and capacitor, " whole " go out one higher
DC voltage.Voltage doubling rectifing circuit is typically how many times of input voltage by output voltage, be divided into two multiplication of voltages, three multiplication of voltages with many times
Voltage rectifier.Voltage doubling rectifing circuit can only work in the case of output electric current is less at light load, otherwise output voltage meeting
Reduce.The rectification circuit that multiplication of voltage is the highest, this because of load current increase affect output voltage decline situation the most obvious.Can welding machine
The electrical equipment of the biggest electric current high capacity, so using voltage-multiplying circuit improper on welding machine, fault rate is high, and electric capacity quantity is many
Utilization rate is low, high in cost of production shortcoming.
Summary of the invention
Present invention aim to address that current twin voltage inverter arc welding machine major loop uses voltage doubling rectifing circuit causing trouble
Rate is high, and electric capacity uses many, the technical problem that cost is high.
For realizing above goal of the invention, the present invention provides the industrial frequency rectifying filter circuit system of a kind of twin voltage inverter arc welding machine
System, including power grid voltage detection circuit, line voltage switching circuit and industrial frequency rectifying filter circuit；
Described power grid voltage detection circuit input connects AC network, is used for detecting line voltage peak value, described line voltage
Testing circuit includes the first relay and the second relay；
Described line voltage switching circuit includes that a pair with described second relay of described first relay is normally opened/normal respectively
Closed contact, the outfan of described line voltage switching circuit connects described industrial frequency rectifying filter circuit；
When described power grid voltage detection circuit detects described line voltage peak value less than 360V, described first relay and the
All be energized adhesive, the normally opened contact of described first relay and the normally opened contact of described second relay of the coil of two relays is equal
Connect, make described industrial frequency rectifying filter circuit carry out full-bridge rectification；When described power grid voltage detection circuit detects described electrical network
When voltage peak is higher than 360V, the coil equal dead electricity release of described first relay and the second relay, described first relay
Normally opened contact and the normally-closed contact of described second relay be turned on, make described industrial frequency rectifying filter circuit carry out half-bridge whole
Stream.
Further, soft starting circuit is also included；
Described soft starting circuit includes the 3rd relay, a normally opened contact rear series connection in parallel with a resistor of described 3rd relay
Front end in described industrial frequency rectifying filter circuit；
After default buffer time, the coil of described 3rd relay is just energized adhesive, makes an institute of the 3rd relay
State normally opened contact to connect.
Further, described soft starting circuit is capacitive buffer circuit.
Further, described industrial frequency rectifying filter circuit includes two bridge heaps, and each described bridge heap is by two branch circuit parallel connections
Becoming, two diode series aiding connections of each described route form；
Described first relay normally open contact the first end connects AC network, and the second end is connected in first bridge heap the second branch road two
Between individual diode；Described first relay normally-closed contact the first end connects AC network by the first electric capacity, and the second end also connects
It is connected in first bridge heap the second branch road between two diodes；
Described second relay normally open contact the first end is by the second electric capacity and described first capacitances in series, and the second end is connected to the
In two bridge heap the second branch roads between two diodes；Described second relay normally-closed contact the first end is connected to described first electricity
Holding, the second end is also connected in second bridge heap the second branch road between two diodes；
Described 3rd relay normally open contact and the first resistor coupled in parallel, described 3rd relay normally open contact the first end connects exchange
Electrical network, the second end is connected in first bridge heap the first branch road between two diodes, and is connected to described second relay normally open
Contact first end；
In described second bridge heap the first branch road, the wire between two diodes is connected to AC network；
Described first bridge heap is parallel with the second resistance, the 3rd electric capacity and the 4th electric capacity respectively, and described second bridge heap is parallel with respectively
3rd resistance, the 5th electric capacity and the 6th electric capacity.
Compared with prior art, the invention has the beneficial effects as follows:
No matter AC network is 220V or 380V to the present invention, and industrial frequency rectifying filter circuit is all wave rectification, solves double
The problem that under voltage status, voltage doubling rectifing circuit electric capacity utilization rate is low；Owing to often organizing industrial frequency rectifying filter circuit main circuit voltage not
More than 310V, make circuit the most relatively reliable, and insulated gate bipolar transistor (IGBT) in follow-up inverter circuit can be made
Operating frequency is higher, further reduces the volume of welding machine；Reduce cost: owing to the service efficiency of electric capacity improves, use multiplication of voltage
The half of circuit capacitance capacity i.e. can reach the output as voltage-multiplying circuit, thus reduces cost.
Accompanying drawing explanation
Fig. 1 is the theory diagram of one embodiment of the invention；
Fig. 2 is the theory diagram of another embodiment of the present invention；
Fig. 3 is power grid voltage detection circuit schematic diagram；
Fig. 4 is line voltage switching circuit and industrial frequency rectifying filter circuit schematic diagram；
Fig. 5 is capacitive buffer circuit theory diagrams.
In figure, power grid voltage detection circuit 1；Line voltage switching circuit 2；Industrial frequency rectifying filter circuit 3；Soft starting circuit
4；First bridge heap BR1；Second bridge heap BR2；First relay K 1；Second relay K 2；3rd relay J 1.
Detailed description of the invention
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.
As shown in figs. 1 and 3, the industrial frequency rectifying filtering circuitry of the twin voltage inverter arc welding machine of the present invention, including electrical network
Voltage detecting circuit 1, line voltage switching circuit 2 and industrial frequency rectifying filter circuit 3；
Power grid voltage detection circuit 1 input connects 220V/380V twin voltage AC network, is used for detecting line voltage peak value,
Power grid voltage detection circuit 1 includes the first relay K 1 and the second relay K 2；
Line voltage switching circuit 2 includes the first relay K 1 and the second relay K 2 a pair normally opened/normally-closed contact respectively,
The outfan of line voltage switching circuit 2 connects industrial frequency rectifying filter circuit 3；
When power grid voltage detection circuit 1 detects line voltage peak value less than 360V, the first relay K 1 and the second relay
All be energized adhesive, the normally opened contact K1 of the first relay and the normally opened contact K2 of the second relay of the coil of K2 is turned on, and makes work
Frequently current rectifying and wave filtering circuit 3 carries out full-bridge rectification；When power grid voltage detection circuit 1 detects line voltage peak value higher than 360V,
The coil equal dead electricity release of the first relay and the second relay, the normally opened contact K1 of the first relay and the second relay normal
Closed contact K2 is turned on, and makes industrial frequency rectifying filter circuit 3 carry out Half bridge rectifier.
Specifically, power grid voltage detection circuit 1 as it is shown on figure 3, when detect line voltage peak value higher than 360V time, pressure-sensitive
Resistance R4 turns on, and optocoupler U1 turns on, and IGCT Q1 triggers ,+24V through resistance R10, R12 and IGCT Q1 to, Zener diode
Z1 is not turned on, and audion Q2 ends, and the first relay K 1 and coil no power of the second relay K 2, as shown in Figure 4, first continues
Electrical equipment normally-closed contact K1 and the second relay normally-closed contact K2 connect, lower section for being in connection in normally-closed contact, i.e. figure in Fig. 4
The contact of state, makes industrial frequency rectifying filter circuit 3 be operated in half-bridge state；
When line voltage peak value being detected less than 360V, varistor R4 is not turned on, and optocoupler U1 is not turned on, and IGCT Q1 does not touches
Sending out ,+24V makes Zener diode Z1 turn on through resistance R7 and R9, and audion Q2 turns on, the first relay K 1 and the second relay K 2
Coil obtain electric adhesive, as shown in Figure 4, the first relay normally open contact K1 and the second relay normally open contact K2 connects, in Fig. 4
Top for the contacting being off in normally opened contact, i.e. figure, make industrial frequency rectifying filter circuit 3 be operated in full-bridge shape
State.
As shown in Figure 4, when electrical network is 220V, relay K 1, K2 work, i.e. attracting state；Bridge heap BR1 and BR2 is also
Connection state, a road filters through bridge heap BR1 full-bridge rectification to electric capacity C3, C4, and output voltage is about 300V.Another Lu Jingqiao heap
BR2 full-bridge rectification filters to electric capacity C5, C6, and output voltage is about 300V.Now on major loop two groups of follow-up inverter circuit
Full-bridge IGBT parallel operation, two groups of major loops are operated in full-bridge state；Often group power is the half of output.
When line voltage is 380V, relay K 1, K2 do not work, K1 and K2 is in normally off, bridge heap BR1 and BR2
It is in series connection；When J1 is positive half cycle, the first bridge heap is through following loop: > BR1 (D1) > C3 > BR1 (D4) > K1 is normally closed > K2 is normally closed
> BR2 > C5 > BR2 (D6) > J2 completes rectifying and wave-filtering, the second bridge heap is through following loop: > BR2 (D5) > C5 > BR2 (D8) > K2 is normally closed >
K1 is normally closed > BR1 (D3) > C3 > BR1 (D2) > J1 completes rectifying and wave-filtering；When J1 is negative half period, the first bridge heap is through following loop: > BR1
(D2) > C3 > BR1 (D3) > K1 is normally closed > K2 is normally closed > BR2 (D8) > C5 > BR2 (D5) > J2 completes rectifying and wave-filtering, the second bridge heap through with
Lower loop: > BR2 (D6) > C5 > BR2 (D7) > K2 is normally closed > K1 is normally closed > BR1 (D4) >
C3 > BR1 (D1) > J1 completes rectifying and wave-filtering process.The voltage the most often organizing major loop is about 270V, at two groups of major loops
In series connection, major loop is made to be operated in half-bridge state；Often group power is the half of output.R2 and R3 is equalizing resistance.
During owing to charging to electrochemical capacitor, immediate current is big, impacts and disturbs to electrical network and rectifier bridge stack, make electricity
Net instability, rectifier bridge stack is easily damaged.As in figure 2 it is shown, for avoiding drawbacks described above, may also include soft starting circuit, such as electric capacity
Buffer circuit.As it is shown in figure 5, capacitive buffer circuit includes the 3rd relay J 1 ,+24V charges to electric capacity C9 through resistance R13, when
When the upper voltage of C9 is more than 10V, Zener diode Z2 turns on, and then audion Q3 conducting, then the 3rd relay J 1 is energized adhesive, this
Individual process is exactly buffering course, have passed through certain buffer time, it is to avoid instantaneous large-current causes punching to electrical network and rectifier bridge stack
Hit and disturb；As shown in Figure 4, industrial frequency rectifying filtering it is series at after a normally opened contact of the 3rd relay J 1 is in parallel with resistance R1
The front end of circuit 3, the 3rd relay J 1 is energized after adhesive, and in Fig. 4, the normally opened contact J1 of the 3rd relay connects, and makes industrial frequency rectifying
Filter circuit 3 enters normal operating conditions；And when normally opened contact J1 access failure, electrical network will be through resistance R1 and bridge heap to electric capacity
C3-C6 charges.
No matter AC network is 220V or 380V to the present invention, and industrial frequency rectifying filter circuit is all wave rectification, solves
The problem that voltage doubling rectifing circuit electric capacity utilization rate is low under twin voltage state；Owing to often organizing industrial frequency rectifying filter circuit major loop electricity
Pressure, less than 310V, makes circuit the most relatively reliable, and can make the insulated gate bipolar transistor in follow-up inverter circuit
(IGBT) operating frequency is higher, further reduces the volume of welding machine；Reduce cost: owing to the service efficiency of electric capacity improves,
The half using voltage-multiplying circuit capacitance i.e. can reach the output as voltage-multiplying circuit, thus reduces cost.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff is complete
Entirely can carry out various change and amendment in the range of without departing from this invention technological thought.The technology of this invention
The content that property scope is not limited in description, it is necessary to determine its technical scope according to right.
Claims (4)
1. the industrial frequency rectifying filtering circuitry of twin voltage inverter arc welding machine, it is characterised in that include power grid voltage detection circuit,
Line voltage switching circuit and industrial frequency rectifying filter circuit；
Described power grid voltage detection circuit input connects AC network, is used for detecting line voltage peak value, described line voltage
Testing circuit includes the first relay and the second relay；
Described line voltage switching circuit includes that a pair with described second relay of described first relay is normally opened/normal respectively
Closed contact, the outfan of described line voltage switching circuit connects described industrial frequency rectifying filter circuit；
When described power grid voltage detection circuit detects described line voltage peak value less than 360V, described first relay and the
All be energized adhesive, the normally opened contact of described first relay and the normally opened contact of described second relay of the coil of two relays is equal
Connect, make described industrial frequency rectifying filter circuit carry out full-bridge rectification；When described power grid voltage detection circuit detects described electrical network
When voltage peak is higher than 360V, the coil equal dead electricity release of described first relay and the second relay, described first relay
Normally opened contact and the normally-closed contact of described second relay be turned on, make described industrial frequency rectifying filter circuit carry out half-bridge whole
Stream.
2. the Circuits System of inverter type welder as claimed in claim 1, it is characterised in that also include soft starting circuit；
Described soft starting circuit includes the 3rd relay, a normally opened contact rear series connection in parallel with a resistor of described 3rd relay
Front end in described industrial frequency rectifying filter circuit；
After default buffer time, the coil of described 3rd relay is just energized adhesive, makes an institute of the 3rd relay
State normally opened contact to connect.
3. the Circuits System of inverter type welder as claimed in claim 2, it is characterised in that described soft starting circuit is capacitive buffer
Circuit.
4. the Circuits System of inverter type welder as claimed in claim 3, it is characterised in that described industrial frequency rectifying filter circuit includes
Two bridge heaps, each described bridge heap is formed by two branch circuit parallel connections, and two diode series aiding connections of each described route form；
Described first relay normally open contact the first end connects AC network, and the second end is connected in first bridge heap the second branch road two
Between individual diode；Described first relay normally-closed contact the first end connects AC network by the first electric capacity, and the second end also connects
It is connected in first bridge heap the second branch road between two diodes；
Described second relay normally open contact the first end is by the second electric capacity and described first capacitances in series, and the second end is connected to the
In two bridge heap the second branch roads between two diodes；Described second relay normally-closed contact the first end is connected to described first electricity
Holding, the second end is also connected in second bridge heap the second branch road between two diodes；
Described 3rd relay normally open contact and the first resistor coupled in parallel, described 3rd relay normally open contact the first end connects exchange
Electrical network, the second end is connected in first bridge heap the first branch road between two diodes, and is connected to described second relay normally open
Contact first end；
In described second bridge heap the first branch road, the wire between two diodes is connected to AC network；
Described first bridge heap is parallel with the second resistance, the 3rd electric capacity and the 4th electric capacity respectively, and described second bridge heap is parallel with respectively
3rd resistance, the 5th electric capacity and the 6th electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610711156.XA CN106141376B (en) | 2016-08-24 | 2016-08-24 | The industrial frequency rectifying filtering circuitry of twin voltage inverter arc welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610711156.XA CN106141376B (en) | 2016-08-24 | 2016-08-24 | The industrial frequency rectifying filtering circuitry of twin voltage inverter arc welding machine |
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| Publication Number | Publication Date |
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| CN106141376A true CN106141376A (en) | 2016-11-23 |
| CN106141376B CN106141376B (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610711156.XA Active CN106141376B (en) | 2016-08-24 | 2016-08-24 | The industrial frequency rectifying filtering circuitry of twin voltage inverter arc welding machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317505A (en) * | 2017-07-07 | 2017-11-03 | 吴忠市中心电焊机有限公司 | A kind of two-way full bridge inverter for being applicable twin voltage automatic conversion |
| US11192201B2 (en) | 2018-08-24 | 2021-12-07 | Shanghai Hugong Electric (Group) Co., Ltd. | Double-power-supply switching control system for a welding machine and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4740878A (en) * | 1987-06-08 | 1988-04-26 | International Conservation Systems, Inc. | Dual voltage power supply having equally split voltage levels |
| CN201979200U (en) * | 2011-01-26 | 2011-09-21 | 深圳华意隆电气股份有限公司 | Inverter type welding machine with dual voltage system |
| CN203471120U (en) * | 2013-09-24 | 2014-03-12 | 永康市帝普特科技有限公司 | Circuit structure of double-voltage welder |
| CN103780105A (en) * | 2014-01-23 | 2014-05-07 | 上海沪工焊接集团股份有限公司 | Method and system for double-voltage automatic switching control |
| CN204103590U (en) * | 2014-09-15 | 2015-01-14 | 浙江宝石机电股份有限公司 | A kind of twin voltage automatic switching control circuit |
-
2016
- 2016-08-24 CN CN201610711156.XA patent/CN106141376B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4740878A (en) * | 1987-06-08 | 1988-04-26 | International Conservation Systems, Inc. | Dual voltage power supply having equally split voltage levels |
| CN201979200U (en) * | 2011-01-26 | 2011-09-21 | 深圳华意隆电气股份有限公司 | Inverter type welding machine with dual voltage system |
| CN203471120U (en) * | 2013-09-24 | 2014-03-12 | 永康市帝普特科技有限公司 | Circuit structure of double-voltage welder |
| CN103780105A (en) * | 2014-01-23 | 2014-05-07 | 上海沪工焊接集团股份有限公司 | Method and system for double-voltage automatic switching control |
| CN204103590U (en) * | 2014-09-15 | 2015-01-14 | 浙江宝石机电股份有限公司 | A kind of twin voltage automatic switching control circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317505A (en) * | 2017-07-07 | 2017-11-03 | 吴忠市中心电焊机有限公司 | A kind of two-way full bridge inverter for being applicable twin voltage automatic conversion |
| CN107317505B (en) * | 2017-07-07 | 2023-10-27 | 吴忠市中心电焊机有限公司 | Be suitable for double-circuit full-bridge inverter circuit of two voltage automatic switching |
| US11192201B2 (en) | 2018-08-24 | 2021-12-07 | Shanghai Hugong Electric (Group) Co., Ltd. | Double-power-supply switching control system for a welding machine and method |
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| Publication number | Publication date |
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| CN106141376B (en) | 2017-11-14 |
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