CN203840223U - Inverter power supply and welding equipment - Google Patents
Inverter power supply and welding equipment Download PDFInfo
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- CN203840223U CN203840223U CN201420232487.1U CN201420232487U CN203840223U CN 203840223 U CN203840223 U CN 203840223U CN 201420232487 U CN201420232487 U CN 201420232487U CN 203840223 U CN203840223 U CN 203840223U
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Abstract
The utility model discloses an inverter power supply and a piece of welding equipment. The inverter power supply comprises a power supply input circuit, a main power circuit, an auxiliary power circuit, a multi-gang switch used for controlling the power-on state of the main power circuit and the auxiliary power circuit, and a soft start circuit used for controlling whether the power supply input circuit supplies power to the main power circuit through the multi-gang switch according to the power supply state of the auxiliary power circuit. According to the utility model, when the multi-gang switch is closed, the soft start circuit short-circuits a connection branch of the multi-gang switch and the main power circuit and causes the power supply input circuit to directly supply power to the main power circuit, and the main power circuit is not longer powered through the multi-gang switch. Therefore, current of the main power circuit does not flow through the multi-gang switch, damage of the multi-gang switch due to high current impact is avoided, protection on the multi-gang switch is realized, the stability of the inverter power supply is improved, and the service life of the welding equipment is prolonged. By using the multi-gang switch as the input switch of the inverter power supply, the cost of the inverter power supply is reduced.
Description
Technical field
The utility model relates to welding technique field, relates in particular to a kind of inverter and welding equipment.
Background technology
The electric current that large power inverter power source starts moment is high, and input current is higher, causes input switch heating serious, affect inverter stability, reduction device useful life, makes service life of a machine limited.For guaranteeing that input switch does not damage when large electric current is inputted, input switch is not only wanted to bear large electric current and is passed through, and also will guarantee that long-term work there will not be the problems such as heating, loose contact, and this is very high to the requirement of input switch.At present, conventionally select expensive air switch as the input switch of large power inverter power source, yet this will increase the cost of inverter, or select common switch to change and make small-power inverter, yet this will reduce the quality of inverter.
Utility model content
Main purpose of the present utility model is to provide a kind of inverter and welding equipment with identical inventive concept, is intended to reduce the cost of inverter, improves the stability of inverter, extends the useful life of welding equipment.
In order to achieve the above object, the utility model provides a kind of inverter, this inverter comprises power supply input circuit, main circuit, auxiliary circuit, for controlling the multigang switch of described main circuit and auxiliary electric power on circuitry state, and for according to described auxiliary electric circuit supply state, control the whether soft starting circuit to described main electric circuit supply via described multigang switch of described power supply input circuit;
The first output of described power supply input circuit is connected with the first input end of described main circuit, and is connected with the first input end of described auxiliary circuit via described multigang switch; The second output of described power supply input circuit is connected with the second input of described main circuit and the second input of described auxiliary circuit respectively via described multigang switch, and is connected via the control end of described soft starting circuit and the second input of described main electric circuit; The first feeder ear of described soft starting circuit is connected with the first power output end of described auxiliary circuit, and the second feeder ear of described soft starting circuit is connected with the second source output of described auxiliary circuit.
Preferably, described in described multigang switch, multigang switch comprises the first sub-switch and the second sub-switch;
The first contact of described the first sub-switch is connected with the first input end of described auxiliary circuit, and the second contact of described the first sub-switch is connected with the first output of described power supply input circuit; The first contact of described the second sub-switch is connected with the second output of described power supply input circuit, and the second contact of described the second sub-switch is connected with the second input of described auxiliary circuit, and is connected with the second input of described main electric circuit.
Preferably, described power supply input circuit comprises the first ac input end, the second ac input end, common mode choke, the first electric capacity and the second electric capacity;
First coil one end of described common mode choke is connected with described the first ac input end, the first coil other end of described common mode choke is connected with the first input end of described main circuit, and via described the first sub-switch, be connected with the first input end of described auxiliary circuit, also via described the first capacity earth;
Second coil one end of described common mode choke is connected with described the second ac input end, the second coil other end of described common mode choke with via described the second sub-switch, be connected with the second input of described main circuit and the second input of described auxiliary circuit respectively, and via the control end of described soft starting circuit and the second input of described main circuit, be connected, also via described the second capacity earth.
Preferably, described power supply input circuit also comprises the first resistance and the 3rd electric capacity;
One end of described the first resistance is connected with described the first ac input end, and the other end of described the first resistance is connected with described the second ac input end; One end of described the 3rd electric capacity is connected with described the first ac input end, and the other end of described the 3rd electric capacity is connected with described the second ac input end.
Preferably, described auxiliary circuit comprises rectifier bridge, transformer, the first diode, pressurizer, photoelectrical coupler, power supply switch controller, the second resistance, the 3rd resistance and the 4th electric capacity;
The first input end of described rectifier bridge is connected with the first contact of described the first sub-switch, the second input of described rectifier bridge is connected with the second contact of described the second sub-switch, the first output of described rectifier bridge is connected with the Same Name of Ends of described transformer, the second output head grounding of described rectifier bridge;
The different name end of described transformer is connected with the drain lead of described power supply switch controller, the Same Name of Ends ground connection of described transformer secondary output coil, the different name end of described transformer secondary output coil and the anodic bonding of described the first diode; The negative electrode of described the first diode is connected with the input pin of described the first power output end and described pressurizer respectively; The output pin of described pressurizer is connected with described second source output, the ground pin ground connection of described pressurizer;
One end of described the second resistance is connected with the negative electrode of described the first diode, the other end of described the second resistance and the anodic bonding of described photoelectrical coupler, and via described the 3rd resistance, be connected respectively the plus earth of described the first voltage-stabiliser tube with the negative electrode of described the first voltage-stabiliser tube with the negative electrode of described photoelectrical coupler;
The collector electrode of described photoelectrical coupler is connected with the enable/under-voltage pin of described power supply switch controller, the grounded emitter of described photoelectrical coupler; Enable/under-voltage the pin of described power supply switch controller is connected with the first output of described rectifier bridge, and the bypass of described power supply switch controller/multi-functional pin is via described the 4th capacity earth, the source lead ground connection of described power supply switch controller.
Preferably, described auxiliary circuit also comprises the 4th resistance, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity and the 8th electric capacity;
The positive pole of described the 5th electric capacity is connected with the first output of described rectifier bridge, the minus earth of described the 5th electric capacity; One end of described the 4th resistance is connected with the positive pole of described the 5th electric capacity, and the other end of described the 4th resistance is connected with the enable/under-voltage pin of described power supply switch controller;
The positive pole of described the 6th electric capacity is connected with the input pin of described the first power output end and described pressurizer respectively, the minus earth of described the 6th electric capacity; One end of described the 7th electric capacity is connected with the positive pole of described the 6th electric capacity, the other end ground connection of described the 7th electric capacity; Described the 8th one end of electric capacity and the output pin of described pressurizer are connected, the other end ground connection of described the 8th electric capacity.
Preferably, described soft starting circuit comprises triode, relay, the 5th resistance, the 9th electric capacity and the second voltage-stabiliser tube;
One end of described the 5th resistance is connected with the second source output of described auxiliary circuit, and the other end of described the 5th resistance is connected with the positive pole of described the 9th electric capacity, and is connected the minus earth of described the 9th electric capacity with the negative electrode of described the second voltage-stabiliser tube; The anodic bonding of the base stage of described triode and described the second voltage-stabiliser tube, the collector electrode of described triode is connected with coil one end of described relay, the grounded emitter of described triode; The coil other end of described relay is connected with the first power output end of described auxiliary circuit, switch one end of described relay is connected with the second output of described power supply input circuit, and the switch other end of described relay is connected with the second input of described main circuit.
Preferably, described soft starting circuit also comprises the second diode and the 3rd diode;
The anode of described the second diode is connected with the positive pole of described the 9th electric capacity, and the negative electrode of described the second diode is connected with the second source output of described auxiliary circuit; Described the 3rd anode of diode and the collector electrode of described triode are connected, and the negative electrode of described the 3rd diode is connected with the first power output end of described auxiliary circuit.
Preferably, described triode is NPN triode.
The utility model further provides a kind of welding equipment, this welding equipment comprises inverter, this inverter comprises power supply input circuit, main circuit, auxiliary circuit, for controlling the multigang switch of described main circuit and auxiliary electric power on circuitry state, and for according to described auxiliary electric circuit supply state, control the whether soft starting circuit to described main electric circuit supply via described multigang switch of described power supply input circuit;
The first output of described power supply input circuit is connected with the first input end of described main circuit, and is connected with the first input end of described auxiliary circuit via described multigang switch; The second output of described power supply input circuit is connected with the second input of described main circuit and the second input of described auxiliary circuit respectively via described multigang switch, and is connected via the control end of described soft starting circuit and the second input of described main electric circuit; The first feeder ear of described soft starting circuit is connected with the first power output end of described auxiliary circuit, and the second feeder ear of described soft starting circuit is connected with the second source output of described auxiliary circuit.
The inverter the utility model proposes, controls main circuit and auxiliary electric power on circuitry state by the keying of multigang switch, and soft starting circuit is according to auxiliary electric circuit supply state, and whether control power supply input circuit gives main electric circuit supply via multigang switch.When multigang switch is closed, power supply input circuit is given respectively main circuit and auxiliary electric circuit supply via multigang switch, auxiliary electric circuit output voltage is powered to soft starting circuit, after soft starting circuit energising work, the branch, short-circuit that is connected by multigang switch with main circuit, control power supply input circuit directly to main electric circuit supply, and no longer via multigang switch, give main electric circuit supply, the multigang switch thereby the electric current of main circuit is not flowed through, only has the electric current of the auxiliary circuit multigang switch of flowing through, make multigang switch can not be subject to heavy current impact, avoid multigang switch because damaged by heavy current impact, the protection of realization to multigang switch, thereby can improve the stability of inverter, extend the useful life of welding equipment.And the utility model utilizes multigang switch as the input switch of inverter, reduce the cost of inverter.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model inverter preferred embodiment;
Fig. 2 is the electrical block diagram of the utility model inverter preferred embodiment.
The realization of the purpose of this utility model, functional characteristics and advantage, in connection with embodiment, and is described further with reference to accompanying drawing.
Embodiment
Below in conjunction with Figure of description and specific embodiment, further illustrate the technical solution of the utility model.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides a kind of inverter, and this inverter is applied to welding equipment.
With reference to Fig. 1, Fig. 1 is the theory diagram of the utility model inverter preferred embodiment.
In the utility model preferred embodiment, inverter comprises power supply input circuit 10, main circuit 20, auxiliary circuit 30, multigang switch 40 and soft starting circuit 50.Multigang switch 40 is for controlling the "on" position of main circuit 20 and auxiliary circuit 30, whether control main circuit 20 and auxiliary circuit 30 connects with power supply input circuit 10, whether power supply input circuit 10 gives main circuit 20 and 30 power supplies of auxiliary circuit, soft starting circuit 50 is for according to the power supply state of auxiliary circuit 30, according to auxiliary circuit 30, whether give soft starting circuit 50 power supplies, control power supply input circuit 10 and whether via multigang switch 40, to main circuit 20, power.
Wherein, the first output of power supply input circuit 10 is connected with the first input end of main circuit 20, and is connected with the first input end of auxiliary circuit 30 via multigang switch 40; The second output of power supply input circuit 10 is connected with the second input of main circuit 20 and the second input of auxiliary circuit 30 respectively via multigang switch 40, and is connected via the control end of soft starting circuit 50 and the second input of main circuit 20; The first feeder ear of soft starting circuit 50 is connected with the first power output end of auxiliary circuit 30, and the second feeder ear of soft starting circuit 50 is connected with the second source output of auxiliary circuit 30.
In the present embodiment, by the keying of multigang switch 40, control the "on" position of main circuit 20 and auxiliary circuit 30, multigang switch 40 is when off-state, the cut off the electricity supply power supply of input circuit 10, make winner's electricity circuit 20 and auxiliary circuit 30 no powers, now main circuit 20 and auxiliary circuit 30 are not worked, and soft starting circuit 50 is not worked yet.
When multigang switch 40 switches to closure state by off-state, main circuit 20 and auxiliary circuit 30 are connected with power supply input circuit 10, power supply input circuit 10 is given main circuit 20 and 30 power supplies of auxiliary circuit via multigang switch 40, the required operating voltage of operating load of welding equipment is exported respectively in main circuit 20 and the 30 energising work of auxiliary circuit, auxiliary circuit 30 output voltages are to soft starting circuit 50 power supplies simultaneously, after soft starting circuit 50 energising work, the branch, short-circuit that is connected by multigang switch 40 with main circuit 20, control power supply input circuit 10 directly to main circuit 20 power supplies, and no longer via multigang switch 40, give main circuit 20 power supplies, the multigang switch 40 thereby electric current of main circuit 20 is not flowed through, only has the electric current of auxiliary circuit 30 multigang switch 40 of flowing through, make multigang switch 40 can not be subject to heavy current impact, avoid multigang switch 40 because damaged by heavy current impact.
With respect to prior art, inverter of the present utility model, when multigang switch 40 is closed, by soft starting circuit 50 by multigang switch 40 branch, short-circuit that is connected with main circuit 20, control power supply input circuit 10 directly to main circuit 20 power supplies, and no longer via multigang switch 40, give main circuit 20 power supplies, the multigang switch 40 thereby electric current that makes winner's electricity circuit 20 is not flowed through, avoid multigang switch 40 because damaged by heavy current impact, the protection of realization to multigang switch 40, thereby can improve the stability of inverter, extended the useful life of welding equipment.And inverter utilizes multigang switch 40 as input switch, reduce the cost of inverter.
Refer again to Fig. 2, Fig. 2 is the electrical block diagram of the utility model inverter preferred embodiment.
As shown in Figure 2, multigang switch 40 comprises the first sub-switch S 1 and the second sub-switch S 2.
The first contact of the first sub-switch S 1 is connected with the first input end of auxiliary circuit 30, and the second contact of the first sub-switch S 1 is connected with the first output of power supply input circuit 10; The first contact of the second sub-switch S 2 is connected with the second output of power supply input circuit 10, and the second contact of the second sub-switch S 2 is connected with the second input of auxiliary circuit 30, and is connected with the second input of main circuit 20.In Fig. 2, the first contact of the second sub-switch S 2 is connected with the second output of power supply input circuit 10 via a thermistor PCT, and the degree of heat of thermistor PCT sensing multigang switch 40, when multigang switch 40 is overheated, protects multigang switch 40.
In the present embodiment, power supply input circuit 10 comprises the first ac input end AC-N, the second ac input end AC-L, common mode choke L1, the first capacitor C 1 and the second capacitor C 2.
First coil one end of common mode choke L1 is connected with the first ac input end AC-N, the first coil other end of common mode choke L1 is connected with the first input end of main circuit 20, and via the first sub-switch S 1, be connected with the first input end of auxiliary circuit 30, also via the first capacitor C 1 ground connection.
Second coil one end of common mode choke L1 is connected with the second ac input end AC-L, the second coil other end of common mode choke L1 with via the second sub-switch S 2, be connected with the second input of main circuit 20 and the second input of auxiliary circuit 30 respectively, and via the control end of soft starting circuit 50 and the second input of main circuit 20, be connected, also via the second capacitor C 2 ground connection.
Particularly, power supply input circuit 10 also comprises the first resistance R 1 and the 3rd capacitor C 3.According to actual needs, the first resistance R 1 can replace with a plurality of resistance series connection.
One end of the first resistance R 1 is connected with the first ac input end AC-N, and the other end of the first resistance R 1 is connected with the second ac input end AC-L; One end of the 3rd capacitor C 3 is connected with the first ac input end AC-N, and the other end of the 3rd capacitor C 3 is connected with the second ac input end AC-L.
In the present embodiment, auxiliary circuit 30 comprises rectifier bridge BD1, transformer T1, the first diode D1, pressurizer U1, photoelectrical coupler U2, power supply switch controller U3, the second resistance R 2, the 3rd resistance R 3 and the 4th capacitor C 4.
The first input end AC1 of rectifier bridge BD1 is as the first input end of auxiliary circuit 30, be connected with the first contact of the first sub-switch S 1, the second input AC2 of rectifier bridge BD1 is as the second input of auxiliary circuit 30, be connected with the second contact of the second sub-switch S 2, the first output DC1 of rectifier bridge BD1 is connected with the Same Name of Ends of transformer T1 primary coil, the second output DC2 ground connection of rectifier bridge BD1.
The different name end of transformer T1 primary coil is connected with the drain lead D of power supply switch controller U3, the Same Name of Ends ground connection of transformer T1 secondary coil, the different name end of transformer T1 secondary coil and the anodic bonding of the first diode D1; The negative electrode of the first diode D1 is connected with the first power output end V1 of auxiliary circuit 30 and the input pin Vin of pressurizer U1 respectively; The output pin Vout of pressurizer U1 is connected with the second source output V2 of auxiliary circuit 30, the ground pin GND ground connection of pressurizer U1.
One end of the second resistance R 2 is connected with the negative electrode of the first diode D1, the anodic bonding of the other end of the second resistance R 2 and photoelectrical coupler U2, and via the 3rd resistance R 3, be connected respectively the plus earth of the first voltage-stabiliser tube ZD1 with the negative electrode of the first voltage-stabiliser tube ZD1 with the negative electrode of photoelectrical coupler U2.
The collector electrode of photoelectrical coupler U2 is connected with the enable/under-voltage pin EN/UV of power supply switch controller U3, the grounded emitter of photoelectrical coupler U2; Enable/under-voltage pin the EN/UV of power supply switch controller U3 is connected with the first output DC1 of rectifier bridge BD1, the bypass of power supply switch controller U3/multi-functional pin BP/M is via the 4th capacitor C 4 ground connection, the source lead S ground connection of power supply switch controller U3, in the present embodiment, power supply switch controller U3 has 4 source lead.
Particularly, auxiliary circuit 30 also comprises the 4th resistance R 4, the 5th capacitor C 5, the 6th capacitor C 6, the 7th capacitor C 7 and the 8th capacitor C 8.According to actual needs, the 4th resistance R 4 can replace with a plurality of resistance series connection.
The positive pole of the 5th capacitor C 5 is connected with the first output DC1 of rectifier bridge BD1, the minus earth of the 5th capacitor C 5; One end of the 4th resistance R 4 is connected with the positive pole of the 5th capacitor C 5, and the other end of the 4th resistance R 4 is connected with the enable/under-voltage pin EN/UV of power supply switch controller U3.
The positive pole of the 6th capacitor C 6 is connected with the first power output end V1 of auxiliary circuit 30 and the input pin Vin of pressurizer U1 respectively, the minus earth of the 6th capacitor C 6; One end of the 7th capacitor C 7 is connected with the positive pole of the 6th capacitor C 6, the other end ground connection of the 7th capacitor C 7; One end of the 8th capacitor C 8 is connected with the output pin Vout of pressurizer U1, the other end ground connection of the 8th capacitor C 8.
In the present embodiment, soft starting circuit 50 comprises triode Q1, relay K 1, the 5th resistance R 5, the 9th capacitor C 9 and the second voltage-stabiliser tube ZD2.Wherein, triode Q1 is NPN triode, and the switch of relay K 1 is as the control end of soft starting circuit 50.
One end of the 5th resistance R 5 is connected with the second source output V2 of auxiliary circuit 30, and the other end of the 5th resistance R 5 is connected with the positive pole of the 9th capacitor C 9, and is connected the minus earth of the 9th capacitor C 9 with the negative electrode of the second voltage-stabiliser tube ZD2; The anodic bonding of the base stage of triode Q1 and the second voltage-stabiliser tube ZD2, the collector electrode of triode Q1 is connected with coil one end of relay K 1, the grounded emitter of triode Q1; The coil other end of relay K 1 is connected with the first power output end V1 of auxiliary circuit 30, and switch one end of relay K 1 is connected with the second output of power supply input circuit 10, and the switch other end of relay K 1 is connected with the second input of main circuit 20.
Particularly, soft starting circuit 50 also comprises the second diode D2 and the 3rd diode D3.
The anode of the second diode D2 is connected with the positive pole of the 9th capacitor C 9, and the negative electrode of the second diode D2 is connected with the second source output V2 of auxiliary circuit 30; The anode of the 3rd diode D3 is connected with the collector electrode of triode Q1, and the negative electrode of the 3rd diode D3 is connected with the first power output end V1 of auxiliary circuit 30.
The operation principle of the utility model inverter specifically describes as follows:
The first ac input end AC-N and the second ac input end AC-L access single-phase alternating current, this single phase alternating current power supply is generally 220V civil power.At multigang switch 40 under off-state, the cut off the electricity supply power supply of input circuit 10 of multigang switch 40, now main circuit 20 and auxiliary circuit 30 no powers, main circuit 20 and auxiliary circuit 30 are not worked, soft starting circuit 50 is not worked yet.
When multigang switch 40 switches to closure state by off-state, the first ac input end AC-N receives the first input end of main circuit 20 through the first coil of common mode choke L1, through the first coil of common mode choke L1, the first sub-switch S 1 of multigang switch 40, receive the first input end of auxiliary electricity circuit, i.e. the first input end AC1 of rectifier bridge BD1 in auxiliary electricity circuit simultaneously.The second ac input end AC-L receives the first input end of main circuit 20 through the second coil of common mode choke L1, the second sub-switch S 2 of multigang switch 40, receive the second input of auxiliary electricity circuit, i.e. the second input AC2 of rectifier bridge BD1 in auxiliary electricity circuit simultaneously.The alternating current of the first ac input end AC-N and the second ac input end AC-L access is through common mode choke L1 filtering interfering, and after the filtering of first resistance R 1, the first capacitor C 1, the second capacitor C 2 and the 3rd capacitor C 3 etc. processes, by multigang switch 40, give main circuit 20 and 30 power supplies of auxiliary circuit, the required operating voltage of operating load of welding equipment is exported respectively in main circuit 20 and the 30 energising work of auxiliary circuit.After 30 work of main circuit 20 and auxiliary circuit, flow through the second sub-switch S 2 of multigang switch 40 of the electric current of main circuit 20, the electric current of auxiliary circuit 30 flow through the first sub-switch S 1 and the second sub-switch S 2 of multigang switch 40.
In auxiliary circuit 30, the first ac input end AC-N, the alternating current of the second ac input end AC-L access is input to the first input end AC1 of rectifier bridge BD1 and the second input AC2 of rectifier bridge BD1, alternating current is after rectifier bridge BD1 rectification, by the first output DC1 output direct current (as 310V direct current) of rectifier bridge BD1, this direct current is input to the Same Name of Ends of transformer T1 primary coil, this direct current is input to the enable/under-voltage pin EN/UV of power supply switch controller U3 through the 4th resistance R 4 simultaneously, power supply switch controller U3 work, now the drain lead D of power supply switch controller U3 and source lead S connect, it is the switching tube conducting of power supply switch controller U3 inside, the different name end of transformer T1 primary coil is equivalent to receive ground and forms loop, transformer T1 starts working the direct current of rectifier bridge BD1 output is carried out to step-down processing, voltage first power output end V1 from auxiliary circuit 30 after the first diode D1 rectification of transformer T1 output exports the first supply power voltage (as 24V direct current), the first supply power voltage is input to the input pin Vin of pressurizer U1 simultaneously, second source output V2 from auxiliary circuit 30 after pressurizer U1 voltage stabilizing exports the second supply power voltage (as 12V direct current).In auxiliary circuit 30, the first supply power voltage of 3 pairs of the first power output end V1 outputs of the second resistance R 2 and the 3rd resistance R is sampled, when the first supply power voltage is greater than predeterminated voltage value (as 24V), photoelectrical coupler U2 conducting, the collector electrode of photoelectrical coupler U2 is pulled to low level, thereby the enable/under-voltage pin EN/UV of power supply switch controller U3 is also pulled to low level, now the drain lead D of power supply switch controller U3 and source lead S disconnect, the switching tube that is power supply switch controller U3 inside turn-offs, transformer T1 is quit work, the first power output end V1 of auxiliary circuit 30, second source output V2 does not have Voltage-output.
In soft starting circuit 50, the first supply power voltage of the first power output end V1 output of auxiliary circuit 30 is input to the coil of relay K 1, the second supply power voltage of the second source output V2 output of auxiliary circuit 30 is given the 9th capacitor C 9 chargings by the 5th resistance R 5, when the voltage in the 9th capacitor C 9 reaches the voltage stabilizing value of the second voltage-stabiliser tube ZD2, the second voltage-stabiliser tube ZD2 conducting, the 9th capacitor C 9 continues charging, until the base voltage of triode Q1 is while reaching the conducting voltage of triode Q1, triode Q1 conducting.For example, if the conducting voltage of triode Q1 is 0.7V, the voltage stabilizing value of the second voltage-stabiliser tube ZD2 is 5.1V, when the voltage in the 9th capacitor C 9 reaches 5.1V, just conducting of the second voltage-stabiliser tube ZD2, when the voltage in the 9th capacitor C 9 reaches 5.8V, just conducting of triode Q1.After triode Q1 conducting, the coil of relay K 1 is equivalent to receive ground and forms loop, the switch of relay K 1 is closed, now the alternating current of the second ac input end AC-L access is directly input to the second input of main circuit 20 through the switch of relay K 1, thereby relay K 1 is by multigang switch 40 short circuits, be about to the branch, short-circuit that is connected of multigang switch 40 and main circuit 20, make the electric current of winner electricity circuit 20 multigang switch 40 of no longer flowing through, only has the electric current of auxiliary circuit 30 multigang switch 40 that continues to flow through, thereby after soft starting circuit 50 work, multigang switch 40 no longer includes large electric current to be passed through, make multigang switch 40 can not be subject to heavy current impact, avoid multigang switch 40 because damaged by heavy current impact, realization is to multigang switch 40 protections.
The utility model further provides a kind of welding equipment, and this welding equipment comprises inverter, and the structure of this inverter, operation principle and the beneficial effect that brings, all with reference to described embodiment, repeat no more herein.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. an inverter, comprise power supply input circuit, main circuit and auxiliary circuit, it is characterized in that, also comprise for controlling the multigang switch of described main circuit and auxiliary electric power on circuitry state, and for according to described auxiliary electric circuit supply state, control the whether soft starting circuit to described main electric circuit supply via described multigang switch of described power supply input circuit;
The first output of described power supply input circuit is connected with the first input end of described main circuit, and is connected with the first input end of described auxiliary circuit via described multigang switch; The second output of described power supply input circuit is connected with the second input of described main circuit and the second input of described auxiliary circuit respectively via described multigang switch, and is connected via the control end of described soft starting circuit and the second input of described main electric circuit; The first feeder ear of described soft starting circuit is connected with the first power output end of described auxiliary circuit, and the second feeder ear of described soft starting circuit is connected with the second source output of described auxiliary circuit.
2. inverter as claimed in claim 1, is characterized in that, multigang switch comprises the first sub-switch and the second sub-switch described in described multigang switch;
The first contact of described the first sub-switch is connected with the first input end of described auxiliary circuit, and the second contact of described the first sub-switch is connected with the first output of described power supply input circuit; The first contact of described the second sub-switch is connected with the second output of described power supply input circuit, and the second contact of described the second sub-switch is connected with the second input of described auxiliary circuit, and is connected with the second input of described main electric circuit.
3. inverter as claimed in claim 2, is characterized in that, described power supply input circuit comprises the first ac input end, the second ac input end, common mode choke, the first electric capacity and the second electric capacity;
First coil one end of described common mode choke is connected with described the first ac input end, the first coil other end of described common mode choke is connected with the first input end of described main circuit, and via described the first sub-switch, be connected with the first input end of described auxiliary circuit, also via described the first capacity earth;
Second coil one end of described common mode choke is connected with described the second ac input end, the second coil other end of described common mode choke with via described the second sub-switch, be connected with the second input of described main circuit and the second input of described auxiliary circuit respectively, and via the control end of described soft starting circuit and the second input of described main circuit, be connected, also via described the second capacity earth.
4. inverter as claimed in claim 3, is characterized in that, described power supply input circuit also comprises the first resistance and the 3rd electric capacity;
One end of described the first resistance is connected with described the first ac input end, and the other end of described the first resistance is connected with described the second ac input end; One end of described the 3rd electric capacity is connected with described the first ac input end, and the other end of described the 3rd electric capacity is connected with described the second ac input end.
5. inverter as claimed in claim 2, is characterized in that, described auxiliary circuit comprises rectifier bridge, transformer, the first diode, pressurizer, photoelectrical coupler, power supply switch controller, the second resistance, the 3rd resistance and the 4th electric capacity;
The first input end of described rectifier bridge is connected with the first contact of described the first sub-switch, the second input of described rectifier bridge is connected with the second contact of described the second sub-switch, the first output of described rectifier bridge is connected with the Same Name of Ends of described transformer, the second output head grounding of described rectifier bridge;
The different name end of described transformer is connected with the drain lead of described power supply switch controller, the Same Name of Ends ground connection of described transformer secondary output coil, the different name end of described transformer secondary output coil and the anodic bonding of described the first diode; The negative electrode of described the first diode is connected with the input pin of described the first power output end and described pressurizer respectively; The output pin of described pressurizer is connected with described second source output, the ground pin ground connection of described pressurizer;
One end of described the second resistance is connected with the negative electrode of described the first diode, the other end of described the second resistance and the anodic bonding of described photoelectrical coupler, and via described the 3rd resistance, be connected respectively the plus earth of described the first voltage-stabiliser tube with the negative electrode of described the first voltage-stabiliser tube with the negative electrode of described photoelectrical coupler;
The collector electrode of described photoelectrical coupler is connected with the enable/under-voltage pin of described power supply switch controller, the grounded emitter of described photoelectrical coupler; Enable/under-voltage the pin of described power supply switch controller is connected with the first output of described rectifier bridge, and the bypass of described power supply switch controller/multi-functional pin is via described the 4th capacity earth, the source lead ground connection of described power supply switch controller.
6. inverter as claimed in claim 5, is characterized in that, described auxiliary circuit also comprises the 4th resistance, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity and the 8th electric capacity;
The positive pole of described the 5th electric capacity is connected with the first output of described rectifier bridge, the minus earth of described the 5th electric capacity; One end of described the 4th resistance is connected with the positive pole of described the 5th electric capacity, and the other end of described the 4th resistance is connected with the enable/under-voltage pin of described power supply switch controller;
The positive pole of described the 6th electric capacity is connected with the input pin of described the first power output end and described pressurizer respectively, the minus earth of described the 6th electric capacity; One end of described the 7th electric capacity is connected with the positive pole of described the 6th electric capacity, the other end ground connection of described the 7th electric capacity; Described the 8th one end of electric capacity and the output pin of described pressurizer are connected, the other end ground connection of described the 8th electric capacity.
7. the inverter as described in any one in claim 1 to 6, is characterized in that, described soft starting circuit comprises triode, relay, the 5th resistance, the 9th electric capacity and the second voltage-stabiliser tube;
One end of described the 5th resistance is connected with the second source output of described auxiliary circuit, and the other end of described the 5th resistance is connected with the positive pole of described the 9th electric capacity, and is connected the minus earth of described the 9th electric capacity with the negative electrode of described the second voltage-stabiliser tube; The anodic bonding of the base stage of described triode and described the second voltage-stabiliser tube, the collector electrode of described triode is connected with coil one end of described relay, the grounded emitter of described triode; The coil other end of described relay is connected with the first power output end of described auxiliary circuit, switch one end of described relay is connected with the second output of described power supply input circuit, and the switch other end of described relay is connected with the second input of described main circuit.
8. inverter as claimed in claim 7, is characterized in that, described soft starting circuit also comprises the second diode and the 3rd diode;
The anode of described the second diode is connected with the positive pole of described the 9th electric capacity, and the negative electrode of described the second diode is connected with the second source output of described auxiliary circuit; Described the 3rd anode of diode and the collector electrode of described triode are connected, and the negative electrode of described the 3rd diode is connected with the first power output end of described auxiliary circuit.
9. inverter as claimed in claim 7, is characterized in that, described triode is NPN triode.
10. a welding equipment, is characterized in that, comprises the inverter described in any one in claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420232487.1U CN203840223U (en) | 2014-05-07 | 2014-05-07 | Inverter power supply and welding equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420232487.1U CN203840223U (en) | 2014-05-07 | 2014-05-07 | Inverter power supply and welding equipment |
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| CN203840223U true CN203840223U (en) | 2014-09-17 |
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| CN201420232487.1U Expired - Fee Related CN203840223U (en) | 2014-05-07 | 2014-05-07 | Inverter power supply and welding equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367727A (en) * | 2017-08-29 | 2022-04-19 | 贝卡尔特公司 | Wire welding and grinding station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114367727A (en) * | 2017-08-29 | 2022-04-19 | 贝卡尔特公司 | Wire welding and grinding station |
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