CN209472559U - A kind of two-line voltage synthesis circuit - Google Patents
A kind of two-line voltage synthesis circuit Download PDFInfo
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- CN209472559U CN209472559U CN201822268605.5U CN201822268605U CN209472559U CN 209472559 U CN209472559 U CN 209472559U CN 201822268605 U CN201822268605 U CN 201822268605U CN 209472559 U CN209472559 U CN 209472559U
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Abstract
The utility model discloses a kind of two-line voltage synthesis circuit, is related to source of welding current technical field comprising: rectification module is coupled with corresponding Power Entry Module；Detection module is coupled with corresponding Power Entry Module, is detected to the voltage of Power Entry Module output and exports detection signal；Inversion switching module is coupled with the output end of rectification module, and carries out the conversion inside circuit in response to detection signal to match with corresponding Power Entry Module；Execution module is coupled with the output end of inversion switching module, so that the voltage of output meets requirement.The utility model has the advantages that improve the service life of capacitor, extends complete machine service life.
Description
Technical field
The utility model relates to source of welding current technical fields, more particularly, to a kind of two-line voltage synthesis circuit.
Background technique
Currently, all exist simultaneously industrial electrical network and domestic power grid both at home and abroad, the also not phase of the voltage class between different zones
Together, such as have 220V/380V, 115V/230V and 120V/240V etc., so the welding of 120V/240V twin voltage is set in the market
It is standby to be popular.
Twin voltage automatic switchover technology passive power factor corrective PFC and the voltage multiplying rectifier electricity of mainstream currently on the market
Road, wherein passive power factor corrective PFC's is at high cost, is not suitable for the actual production of inexpensive DIY welding machine, and voltage multiplying rectifier
The structure of circuit is simple and at low cost, to be widely used, but voltage doubling rectifing circuit also have the shortcomings that it is apparent.
As shown in Figure 1, being the circuit diagram of existing voltage doubling rectifing circuit, wherein breaking when inputting network pressure is that 220/240V is lied prostrate
A times potential relay J1 is opened, capacitor C, C2 are to be connected in series, and 220/240V exchange input is through D3, D4, D5, the full-bridge rectification of D6 composition
It after circuit rectifies, is filtered by C1, C2, generates the full-bridge inverting electricity of stable DC (DC310V/340V) supply rear class
Road.And when inputting network pressure is 110/120V, " network pressure detection circuit " can execute voltage doubling operations, and driving times potential relay J1 inhales
It closes, at this moment capacitor C1, the midpoint C2 is connected to ac input end, and D3, D4, C1, C2 constitute the voltage doubling rectifing circuit of standard, so defeated
When the filtered output voltage of 110V/120V AC rectification entered exchanges input (not passing through voltage multiplying rectifier) with 220V/240V
Rectifier output voltage it is identical, be all DC310/340V, for the full bridge inverter of rear class, the complete phase of supply voltage
Together.
But this circuit, to voltage capacitance C1 again, the requirement of C2 is very high, for the alternating current of 50/60HZ, to transmit
The capacity requirement of the power of 5KW, the two capacitors is very high, usually only uses electrolytic capacitor, and have very big electric current to flow through
The two capacitors cause the two capacity loss serious, generate heat larger, because the service life of electrolytic capacitor and temperature relation are very
(temperature is every to increase 10 degree, and the service life of electrolytic capacitor will shorten one times) greatly, excessively high temperature makes the service life of electrolytic capacitor seriously contract
It is short, therefore the welding equipment that twin voltage switches is realized using the technology, machine life is also very short, and using double electricity of multiplication of voltage technology
Welding equipment is pressed, (110V input) often reduces output power under pressure condition again, generally reduction 20%-30%, cannot export
Specified power.
Utility model content
The purpose of the utility model is to provide a kind of two-line voltage synthesis circuits, improve the service life of capacitor, extend making for complete machine
Use the service life.
The purpose of this utility model has the technical scheme that
Rectification module is coupled with corresponding Power Entry Module；Detection module, with the output of corresponding Power Entry Module
End coupling detects the voltage of Power Entry Module output and exports detection signal；Inversion switching module, including transistor
Q1, transistor Q2, transistor Q3, transistor Q4, capacitor C1, capacitor C2 and transformer T1, transformer T1 include coil N1, line
N2, coil N3 are enclosed, transistor Q1, transistor Q2 are sequentially connected in series between the output end and ground of rectification module, transistor Q3, crystal
Pipe Q4 is sequentially connected in series between the output end and ground of rectification module, when Power Entry Module exports the first network pressure, coil N1's
Both ends are coupled with the emitter of transistor Q1, transistor Q3 respectively, and capacitor C1, capacitor C2 are in parallel in Power Entry Module
Between output end and ground；When the network pressure of Power Entry Module output second, the emitter short circuit of transistor Q1, transistor Q3,
And capacitor C1, capacitor C2 are series between the output end of Power Entry Module and ground, and the both ends of coil N1 respectively with capacitor C1
With the emitter coupling of the coupling point, transistor Q3 of capacitor C2；Execution module is coupled with the output end of inversion switching module, and
Output meets the voltage of requirement.
By adopting the above technical scheme, the input terminal of rectification module is coupled with corresponding Power Entry Module, to be whole
A control circuit provides voltage, while detection module detects the voltage of rectification module input terminal, and judges power input
The type of module, output detection signal.
As input be the first network pressure when, transistor Q1, transistor Q2, transistor Q3, transistor Q4 formed full-bridge inverting electricity
Road, and capacitor C1, capacitor C2 are parallel between the output end of Power Entry Module and ground, this is times normal condition.
When input is second voltage, transistor Q1, transistor Q2, transistor Q3, transistor Q4 form half-bridge inversion circuit,
And capacitor C1, capacitor C2 are series between the output end of Power Entry Module and ground, this is times pressure condition.
If identical power, the power device of half-bridge inversion circuit will flow through 2 times when exporting with using first voltage
In the electric current of full bridge inverter, transistor Q1, transistor Q2, transistor Q3, transistor Q4 current rating to double,
Under the premise of not increasing cost, full bridge inverter is identical as the correspondence output power of half-bridge inversion circuit, and capacitor C1, capacitor
C2 is operated normally, and is improved the service life of capacitor, is extended the service life of complete machine.
The utility model is further arranged to: inversion switching module also relay J1, relay J2, and relay J1, which has, to be opened
Closing S1-1, switch S1-2 and switch S1-3, relay J2 has switch S2-1, switch S2-2 and switch S2-3, coil N1
And switch S1-1 is series between the emitter of transistor Q1 and the emitter of transistor Q3；Switch S1-2 is series at transistor Q1
Emitter and transistor Q3 emitter between；Switch S1-3 and capacitor C2 is series at the one end of coil N1 far from transistor Q1
Between ground, switch S1-1 and switch S1-3 are located at the ipsilateral of coil 1；Switch S2-1 is series at the output end and electricity of rectification module
Between the anode for holding C2；Switch S2-2 and capacitor C1 is series between the output end of rectification module and the anode of capacitor C2；It opens
S2-3 is closed to be series between the cathode and ground of capacitor C1.
By adopting the above technical scheme, inverter bridge leg is constituted by transistor Q1, transistor Q2, transistor Q3, transistor Q4, led to
Cross relay J1 to switch over, the connection type of this 4 transistors can be switched between half-bridge, full-bridge, by after
The switching of series and parallel between capacitor C1, capacitor C2 may be implemented to match with the connection type of transistor in electric appliance J2, so as to
Adapt to the first network pressure, the network pressure of the second network pressure input, and have the advantages that it is at low cost, by reduction to capacitor C1's and capacitor C2
Damage, to improve the service life of complete machine.
The utility model is further arranged to: transistor Q1, transistor Q2, transistor Q3, transistor Q4 are set as insulating
Grid bipolar junction transistor.
By adopting the above technical scheme, insulated gate bipolar transistor is combined by MOSFET and bipolar junction transistor
A kind of device, the advantages of having merged both devices, both with that MOSFET element driving power is small and switching speed is fast is excellent
Point, and have the advantages that bipolar device saturation pressure reduces and capacity is big, to adapt to the high pressure of input, improve the whole use longevity
Life.
The utility model is further arranged to: switch S1-1, switch S2-1, switch S2-3 synchronizing close or disconnection, switch
S1-3, switch S1-2, switch S2-2 synchronizing close or disconnection, switch S1-1 and switch S1-3 Close asynchronously or disconnection.
By adopting the above technical scheme, when input is the network pressure of 220/240V, switch S1-1, switch S2-1, switch S2-3
Synchronizing close, switch S1-3, switch S1-2, switch S2-2 are synchronous to be disconnected, and realizes that the first network pressure of adaptation, the correspondence of the second network pressure are defeated
Enter.
The utility model is further arranged to: further including the prompting mould for reminding user to use Power Entry Module type
Block, reminding module are electrically connected with inversion switching module.
By adopting the above technical scheme, by the way that reminding module is arranged, reminding module has 2 kinds of modes and and Power Entry Module
Corresponding matching, so that quickly understanding user currently in use is the first network pressure or the second network pressure.
The utility model is further arranged to: reminding module includes the first LED light, the second LED light and power supply unit, after
Electric appliance J2 further includes switch S2-4, switch S2-5, and the first LED light and switch S2-4 are series at the output end of power supply unit, and second
LED light is connected and the output end of power supply unit with switch S2-5, switch S2-4 switch S2-1 synchronizing close, switch S2-5 and switch
S2-3 synchronizing close.
By adopting the above technical scheme, cooperated by the second LED light of setting and the second network pressure, the first LED light and the first network pressure
Cooperation, so as to understand the power conditions used by the prompt of the second LED light and the first LED light.
The utility model is further arranged to: execution module includes diode D1, diode D2, resistance R and inductance L,
Coil N2 connects with coil N3 and couples with coil N1；The anode and coil N3 of diode D1 is coupled far from one end of coil N2；
The anode and coil N2 of diode D2 is coupled far from one end of coil N3, the cathode of diode D2 and the cathode coupling of diode D1
It connects；Inductance L and resistance R is series between the coupling point of the cathode of diode D2, coil N2 and coil N3.
By adopting the above technical scheme, coil N1, coil N2 and coil N3 are the component of same transformer, consequently facilitating suitable
It answers corresponding using equipment.
In conclusion the advantageous effects of the utility model are as follows:
(1) detection letter module detects the voltage of rectification module input terminal, believes that inversion switching module according to detection
Number corresponding mode of selection, then execution module exports corresponding voltage, and capacitor C1, capacitor C2 are operated normally, and improves capacitor
Service life, extend the service life of complete machine；
(2) switched over by relay J1, can the connection types of this 4 transistors between full-bridge, half-bridge into
Row switching enables adaptation to the first network pressure, the input of the second network pressure network pressure；
(3) cooperated by the first LED light of setting and the first network pressure, the second LED light and the second network pressure cooperate, so as to logical
The prompt for crossing the second LED light and the first LED light understands the power conditions used.
Detailed description of the invention
Fig. 1 is the circuit diagram of existing voltage doubling rectifing circuit；
Fig. 2 is the integrated circuit figure of the utility model；
Fig. 3 is the circuit diagram of inversion switching module and execution module in Fig. 2；
Fig. 4 is the network pressure that input is 220V/240V in Fig. 3, the circuit diagram of inversion switching module, execution module；
Fig. 5 is the network pressure that input is 110V/120V in Fig. 3, the circuit diagram of inversion switching module, execution module；
Fig. 6 is the circuit diagram of reminding module.
Appended drawing reference: 1, rectification module；2, detection module；3, inversion switching module；4, execution module；5, reminding module；
6, the first LED light；7, the first LED light；8, Power Entry Module；9, power supply unit.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Referring to Fig. 2 and Fig. 3, a kind of two-line voltage synthesis circuit, including rectification module 1, detection module 2, inversion switching module
3, execution module 4.The input terminal of rectification module 1 is coupled with corresponding Power Entry Module 8, while 2 pairs of detection module rectifications
The voltage of 1 input terminal of module is detected, and judges the type of Power Entry Module 8, believes that inversion switching module 3 according to detection
Number corresponding mode of selection, then execution module 4 exports corresponding voltage.
Referring to Fig. 2 and Fig. 3, rectification module 1 includes diode D3, diode D4, diode D5, diode D6.Diode
D4 cathode is coupled with diode D3 cathode, and the anode and diode D6 cathode of diode D4 couples；The anode of diode D6 connects
Ground, the anode of diode D3 and the cathode of diode D4 couple；The plus earth of diode D5.Diode D3, diode D4
Anode is coupled with corresponding Power Entry Module 8, so that the network pressure of 110V/120V, 220V/240V are inputted, by the rectification mould
From the cathode output voltage VDCBUS of diode D3 after the rectification of block 1.
Referring to Fig. 2 and Fig. 3, detection module 2 is coupled with corresponding Power Entry Module 8, is exported to Power Entry Module 8
Voltage is detected and exports detection signal, and wherein detection module 2 is set as network pressure detection circuit, which is the prior art,
It does not just repeat in detail herein.
Referring to Fig. 2 and Fig. 3, inversion switching module 3 is coupled with the output end of rectification module 1, and in response to detection signal into
Voltage matches of the conversion of row circuit to be exported with rectification module 1.Inversion switching module 3 includes transistor 1, transistor Q2, crystalline substance
Body pipe Q3, transistor Q4, capacitor C1, capacitor C2, relay J1, relay J2 and transformer T1, transformer T1 include coil
N1, coil N2, coil N3, relay J1 have switch S1-1, switch S1-2 and switch S1-3, and relay J2 has switch
S2-1, switch S2-2 and switch S2-3.
Referring to Fig. 2 and Fig. 3, the collector of transistor Q1 and the cathode of diode D3 are coupled；The collector of transistor Q2 with
The emitter of transistor Q1 couples, emitter ground connection；The collector of transistor Q3 and the output end of rectification module 1 couple；Crystal
The collector of pipe Q4 and the emitter of transistor Q3 couple, emitter ground connection；Coil N1 and switch S1-1 are series at transistor Q1
Emitter and transistor Q3 emitter between；Switch S1-2 is series at the transmitting of the emitter and transistor Q3 of transistor Q1
Between pole；
It is series between coil N1 one end and ground far from transistor Q1 referring to Fig. 2 and Fig. 3, switch S1-3 and capacitor C2；
Switch S2-1 is series between the cathode of diode D3 and the anode of capacitor C2；Switch S2-2 and capacitor C1 are series at diode
Between the cathode of D3 and the anode of capacitor C2；Switch S2-3 is series between the cathode and ground of capacitor C1.Switch S1-1, switch
S2-1, switch S2-3 synchronizing close or disconnection, switch S1-3, switch S1-2, switch S2-2 synchronizing close or disconnection, switch S1-1
With switch S1-3 Close asynchronously or disconnection, switch S1-1 and switch S1-3 are located at the ipsilateral of coil 1.Wherein transistor Q1, crystal
Pipe Q2, transistor Q3, transistor Q4 are set as insulated gate bipolar transistor.
Referring to Fig. 3 and Fig. 4, when detection signal detection to input is first voltage, first voltage 220V/240V, after
Under the action of electric appliance J1 and relay J2, switch S1-1, switch S2-1, switch S2-3 synchronizing close, switch S1-3, switch S1-
2, switch S2-2 is synchronous disconnects, so that transistor Q1, transistor Q2, transistor Q3, transistor Q4 constitute full-bridge inverting mode, and
Capacitor C1, C2 are configured to paralleling model.
Referring to Fig. 3 and Fig. 5, when detection signal detection to input is second voltage, second voltage 110V/120V, after
Under the action of electric appliance J1 and relay J2, switch S1-1, switch S2-1, switch S2-3 are synchronous to be disconnected, switch S1-3, switch S1-
2, switch S2-2 synchronizing close, so that transistor Q1, transistor Q2, transistor Q3, transistor Q4 constitute semi-bridge inversion mode, and
Capacitor C1, C2 are configured to series model, thus output voltage identical with 220V/240V.
Referring to Fig. 3, execution module 4 includes diode D1, diode D2, resistance R and inductance L, coil N2 and coil N3
It connects and is coupled with coil N1；The anode and coil N3 of diode D1 is coupled far from one end of capacitor C2；The anode of diode D2
It is coupled with coil N2 far from one end of capacitor C3, the cathode of diode D2 and the cathode of diode D1 couple；Inductance L and resistance R
It is series between the cathode, coil N2 and the coupling point of coil N3 of diode D2, thus the electricity needed for the output of the both ends of resistance R
Pressure.
Referring to Fig. 2 and Fig. 5, which further includes reminding module 5, and reminding module 5 is for reminding user to use power supply
8 type of input module, reminding module 5 are electrically connected with inversion switching module 3.Reminding module 5 includes the second LED light 6, the first LED
Lamp 7 and power supply unit 9.
Referring to Fig. 2 and Fig. 5, relay J2 further includes switch S2-4, switch S2-5, and the first LED light 6 is connected with switch S2-4
In the output end of power supply unit 9, the second LED light 7 and switch S2-5 is series at the output end of power supply unit 9, switch S2-4 switch
S2-1 synchronizing close, switch S2-5 and switch S2-3 synchronizing close.And first LED light 6 be set as red light, the setting of the second LED light 7
For green light.When red light is bright, Power Entry Module 8 inputs the network pressure of 220V/240V, and when green light, Power Entry Module 8 is defeated
Enter the network pressure of 110V/120V.
The implementation principle of the present embodiment are as follows: when inputting the network pressure of 220V/240V, red light is bright, and 3 shape of inversion switching module
At full bridge inverter；When inputting the network pressure of 110V/120V, green light, and inversion switching module 3 forms slab bridge inversion electricity
Road, to obtain identical output voltage.
The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this
The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical
Within novel protection scope.
Claims (7)
1. a kind of two-line voltage synthesis circuit characterized by comprising
Rectification module (1) is coupled with corresponding Power Entry Module (8)；
Detection module (2) is coupled with the output end of corresponding Power Entry Module (8), to the electricity of Power Entry Module (8) output
Pressure is detected and exports detection signal；
Inversion switching module (3), including transistor Q1, transistor Q2, transistor Q3, transistor Q4, capacitor C1, capacitor C2 and
Transformer T1, transformer T1 include coil N1, coil N2, coil N3, and transistor Q1, transistor Q2 are sequentially connected in series in rectification module
(1) between output end and ground, transistor Q3, transistor Q4 are sequentially connected in series between the output end and ground of rectification module (1),
When Power Entry Module (8) export the first network pressure, the transmitting with transistor Q1, transistor Q3 respectively of the both ends of coil N1
Pole coupling, and capacitor C1, capacitor C2 are in parallel between the output end and ground of Power Entry Module (8)；
When Power Entry Module (8) export the second network pressure, the emitter short circuit of transistor Q1, transistor Q3, and capacitor C1, electricity
Hold C2 be series between the output end and ground of Power Entry Module (8), and the both ends of coil N1 respectively with capacitor C1 and capacitor C2
Coupling point, transistor Q3 emitter coupling；
Execution module (4) couples with the output end of inversion switching module (3), and exports the voltage for meeting requirement.
2. a kind of two-line voltage synthesis circuit according to claim 1, which is characterized in that inversion switching module (3) also relay
Device J1, relay J2, relay J1 have switch S1-1, switch S1-2 and switch S1-3, relay J2 with switch S2-1,
Switch S2-2 and switch S2-3,
Coil N1 and switch S1-1 is series between the emitter of transistor Q1 and the emitter of transistor Q3；Switch S1-2 series connection
Between the emitter of transistor Q1 and the emitter of transistor Q3；Switch S1-3 and capacitor C2 is series at coil N1 far from crystal
Between one end and ground of pipe Q1, switch S1-1 and switch S1-3 are located at the ipsilateral of coil 1；
Switch S2-1 is series between the output end of rectification module (1) and the anode of capacitor C2；Switch S2-2 and capacitor C1 string
It is coupled between the output end of rectification module (1) and the anode of capacitor C2；Switch S2-3 is series between the cathode and ground of capacitor C1.
3. a kind of two-line voltage synthesis circuit according to claim 2, which is characterized in that transistor Q1, transistor Q2, crystal
Pipe Q3, transistor Q4 are set as insulated gate bipolar transistor.
4. a kind of two-line voltage synthesis circuit according to claim 3, which is characterized in that switch S1-1, switch S2-1, switch
S2-3 synchronizing close or disconnection, switch S1-3, switch S1-2, switch S2-2 synchronizing close or disconnection, switch S1-1 and switch S1-
3 Close asynchronouslies or disconnection.
5. a kind of two-line voltage synthesis circuit according to claim 4, which is characterized in that further include for reminding user to use
The reminding module (5) of Power Entry Module (8) type, reminding module (5) are electrically connected with inversion switching module (3).
6. a kind of two-line voltage synthesis circuit according to claim 5, which is characterized in that reminding module (5) includes the first LED
With power supply unit (9), relay J2 further includes switch S2-4, switch S2-5, the first LED light (6) for lamp (6), the second LED light (7)
The output end of power supply unit (9) is series at switch S2-4, the second LED light (7) and switch S2-5 are series at power supply unit (9)
Output end, switch S2-4 switch S2-1 synchronizing close, switch S2-5 and switch S2-3 synchronizing close.
7. a kind of two-line voltage synthesis circuit according to claim 2, which is characterized in that execution module (4) includes diode
D1, diode D2, resistance R and inductance L,
Coil N2 connects with coil N3 and couples with coil N1；The anode and one end coupling of the coil N3 far from coil N2 of diode D1
It connects；The anode and coil N2 of diode D2 is coupled far from one end of coil N3, the cathode of diode D2 and the cathode of diode D1
Coupling；Inductance L and resistance R is series between the coupling point of the cathode of diode D2, coil N2 and coil N3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822268605.5U CN209472559U (en) | 2018-12-28 | 2018-12-28 | A kind of two-line voltage synthesis circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822268605.5U CN209472559U (en) | 2018-12-28 | 2018-12-28 | A kind of two-line voltage synthesis circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014889A (en) * | 2019-12-25 | 2020-04-17 | 浙江颐顿机电有限公司 | Single-phase full-network-communication inverter welding machine circuit |
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2018
- 2018-12-28 CN CN201822268605.5U patent/CN209472559U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014889A (en) * | 2019-12-25 | 2020-04-17 | 浙江颐顿机电有限公司 | Single-phase full-network-communication inverter welding machine circuit |
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