CN102801205B - Dual-voltage power supply circuit and inverter welding machine comprising same - Google Patents
Dual-voltage power supply circuit and inverter welding machine comprising same Download PDFInfo
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- CN102801205B CN102801205B CN201110137322.7A CN201110137322A CN102801205B CN 102801205 B CN102801205 B CN 102801205B CN 201110137322 A CN201110137322 A CN 201110137322A CN 102801205 B CN102801205 B CN 102801205B
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- 229910052802 copper Inorganic materials 0.000 claims description 3
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Abstract
The invention discloses a dual-voltage power supply. The dual-voltage power supply comprises a power input end, a power output end, a control transformer, a power supply control circuit and a voltage detection circuit, wherein a rectifier circuit and a voltage-doubling circuit are connected in series between the power input end and the power output end; the control transformer is connected with the power input end; the power supply control circuit and the voltage detection circuit are connected with the control transformer; the power supply control circuit comprises a first relay and a second relay, wherein the first relay is arranged between the power input end and the control transformer, and the second relay is arranged among the power input end, the rectifier circuit and the voltage-doubling circuit; the control transformer is provided with a 220V primary winding and a 380V primary winding; and the voltage-doubling circuit comprises two groups of capacitor-resistor circuits which are connected in series with each other. An inverter welding machine can be used in the places with a power supply of 380 V or 220 V very conveniently; a good radiating effect is achieved; the connection wires among the components are the shortest; and a rectifier board adopts an integrated output piece, so that the faults of the rectifier board are reduced.
Description
Technical field
The present invention relates to a kind of inverter type welder, more particularly refer to a kind of inverter type welder that can connect the power circuit of 380V and 220V bis-kinds of power supplys.
Background technology
In prior art, the power supply of domestic all kinds of electric equipment products uses specification usually to have two kinds, and one is 380V, and one is 220V, for the ease of adopting the power supply of different size, usually can adopt a manual switch switched, for selecting the power supply of different size.But manual when switching, easily go wrong, such as electric equipment products are before the use, by electrical source exchange when 220V shelves, may when judging, directly insert the power supply of 380V, this situation can burn out power circuit.In addition owing to adopting the switch of manual switching, except artificial judgment will be carried out before use power supply, also need to carry out manual operations, program is more miscellaneous, owing to needing to adopt the manual switch switched, also cause the structure of power circuit more complicated, cost also rises, and uses and bothers on the contrary more.
Based on the defect of above-mentioned prior art, I develops a kind of inverter type welder that automatically can carry out switching between the power supply of two kinds of voltages.
Summary of the invention
The object of the invention is to the defect for overcoming prior art, and provide a kind of automatically can carry out switching between the power supply of two kinds of voltages inverter type welder.
For achieving the above object, the present invention is by the following technical solutions:
Be provided with an inverter type welder for double-voltage electric power circuit, comprise the power circuit of twin voltage; The power circuit of described twin voltage comprises power input and power output end, rectification circuit and voltage-multiplying circuit is in series with between power input and power output end, also comprise the control transformer connected with power input, and the power control circuit, the voltage detecting circuit that connect with control transformer; Described power control circuit comprises the first relay be located between power input and control transformer, and is located at the second relay between power input and rectification circuit, voltage-multiplying circuit; Described control transformer is provided with 220V former limit winding and 380V former limit winding, and described voltage-multiplying circuit comprises the capacitor-resistor circuit of two groups of series connection; Also be provided with squirrel-cage rectifier structure, described squirrel-cage rectifier structure comprises the cowling panel bottom being located at, is located at the inversion assembly on top and is located at the radiator of two sides, described radiator is the aluminium section bar that both sides are provided with fin, centre is provided with cavity, down, compartment is equipped with aforesaid cowling panel to described cavity; Described cowling panel is provided with the out splice going splice of more than two, and described out splice going splice and cowling panel body are that welded type entirety connects.Described out splice going splice extends outward 3.5 ~ 5cm from cowling panel body; Wherein, utilize after out splice going splice and wiring board body carry out tight joint by pre-joint bolt assembly during welding, then carry out the welding procedures such as soldering; Out splice going splice wherein carries out easy-dismount with outside wire or connector connect by being provided with draw-in groove, buckle or Quick coupling part.
Its further technical scheme is: the normally-closed contact of described first relay connects with power input, 380V former limit winding, and the normally opened contact of the first relay connects with power input, 220V former limit winding; The normally-closed contact of described second relay connects with the input of power input, rectification circuit, and the normally opened contact of the second relay connects with the series connection point of power input, two groups of capacitor-resistor circuit.
Its further technical scheme is: described voltage detecting circuit comprises the test side connected with the secondary of control transformer, and the output connected with power control circuit; Voltage stabilizing circuit is provided with between described power control circuit and control transformer.
Its further technical scheme is: described capacitor-resistor circuit comprises electric capacity, the resistance of multiple parallel connection.
Its further technical scheme is: be also provided with soft starting circuit between described power input and the second relay, and described power control circuit also comprises the 3rd relay.
Its further technical scheme is: described soft starting circuit comprises thermistor, and the normally opened contact of described 3rd relay is in parallel with thermistor.
Its further technical scheme is: described voltage stabilizing circuit comprises LM7812 chip, and described voltage detecting circuit is triode voltage sample circuit, and described power control circuit also comprises LM358 chip and transistor drive circuit.
Invention beneficial effect is compared with prior art: the present invention is owing to have employed voltage detecting circuit, the voltage of power input is detected, when detecting that input voltage is 380V, the former limit winding of control transformer selects the 380V union end of acquiescence, and rectification circuit directly connects with power output end; When detecting that input voltage is 220V, the former limit winding of control transformer switches to 220V union end, and between rectification circuit and power output end, access voltage-multiplying circuit, form rectification multiple pressuring circuit, thus ensure that when input power is 220V, the voltage of control circuit and the output end voltage of main circuit, the same when being 380V with input power; Realize the automatic switchover of 380V/220V twin voltage.Inverter type welder of the present invention both have employed the power circuit of twin voltage, also adopt mouse cage type structure, inversion assembly, cowling panel and radiator are wherein combined, and the out splice going splice of cowling panel additionally uses the monolithic construction of the certain distance that stretches out (protruding 3.5 ~ 5cm), inverter type welder of the present invention all can be able to be used in the place with 380V or 220V power supply, very convenient; Both there is good radiating effect, made again the line between all parts the shortest; This structure reduces welding machine volume greatly, is conducive to again heat radiation, is conducive to the modularized production of each parts.Cowling panel structure is owing to adopting the output of integral type, extend the distance between output connection holes and wiring board body, thus be conducive to the heat radiation of output, reduce the heating of the connection place of output to the impact of wiring board, reduce the fault of cowling panel, after tested, adopt the cowling panel of this structure, because this output interface failure rate caused of generating heat is zero.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of the power circuit specific embodiment of twin voltage of the present invention;
Fig. 2 is the circuit theory diagrams of the power circuit specific embodiment of twin voltage of the present invention;
Fig. 3 is a kind of inverter type welder specific embodiment block diagram being provided with double-voltage electric power circuit of the present invention;
Fig. 4 is a kind of squirrel-cage rectifier structure stereogram being provided with the inverter type welder specific embodiment of double-voltage electric power circuit of the present invention;
Fig. 5 is a kind of floor map being provided with the cowling panel of the squirrel-cage rectifier structure of the inverter type welder specific embodiment of double-voltage electric power circuit of the present invention.
Description of reference numerals
T inverter type welder
R power circuit S squirrel-cage rectifier structure
1 cowling panel 10 connection holes
11 out splice going splice 12 out splice going splices
13 pre-manufactured holes
2 inversion assembly 21 inversion plates
22 drive plate 23 PWM plates
3 radiators
31 fin 32 cavitys
4 fans
51 power input 52 power output ends
61 rectification circuit 62 voltage-multiplying circuits
621,622 capacitor-resistor circuit 623 series connection points
63 soft starting circuit 71 control transformers
711 winding 712 380V former limit, 220V former limit windings
72 power control circuit 721 first relays
722 second relay 73 voltage detecting circuits
731 test side 732 outputs
74 voltage stabilizing circuits
Embodiment
In order to more fully understand technology contents of the present invention, below in conjunction with specific embodiment and Figure of description technical scheme of the present invention being introduced further and illustrating, but being not limited to this.
As depicted in figs. 1 and 2, the power circuit of twin voltage of the present invention, comprise power input 51 and power output end 52, rectification circuit 61 and voltage-multiplying circuit 62 is in series with between power input 51 and power output end 52, also comprise the control transformer 71 connected with power input 51, and the power control circuit 72, the voltage detecting circuit 73 that connect with control transformer 71; Power control circuit 72 comprises the first relay 721 be located between power input 51 and control transformer 71, and is located at the second relay 722 between power input 51 and rectification circuit 61, voltage-multiplying circuit 62; Control transformer 71 is provided with 220V former limit winding 711 and 380V former limit winding 712, and voltage-multiplying circuit 62 comprises the capacitor-resistor circuit 621,622 of two groups of series connection.
The normally-closed contact of the first relay 721 (K1-1 as shown in Figure 2) wherein connects with power input 51,380V former limit winding 712, and the normally opened contact of the first relay 721 connects with power input 51,220V former limit winding 711; The normally-closed contact of the second relay 722 (being made up of multiple relay in the present embodiment) connects with the input of power input 51, rectification circuit 61, and the series connection point 623 of normally opened contact and power input 51, two groups of capacitor-resistor circuit 621,622 of the second relay 722 connects.Voltage detecting circuit 73 comprises the test side 731 connected with the secondary of control transformer 71, and the output 732 connected with power control circuit 72; Voltage stabilizing circuit 74 is provided with between power control circuit 72 and control transformer 71.Capacitor-resistor circuit 621,622 comprises electric capacity, the resistance of multiple parallel connection, as the R101 ~ R108 in Fig. 2 and C101 ~ C108.
Also be provided with soft starting circuit 63 between power input 51 and the second relay 722, power control circuit 72 also comprises the 3rd relay 723.Soft starting circuit 63 is made up of three thermistors (NTC1 ~ NTC3 as shown in Figure 2), and the normally opened contact of the 3rd relay 723 (K4 as shown in Figure 2) is in parallel with thermistor (NTC1 ~ NTC3 as shown in Figure 2).
Voltage stabilizing circuit 74 wherein comprises LM7812 chip, voltage detecting circuit 73 is triode voltage sample circuit (Q1 as Fig. 2), and power control circuit 72 also comprises LM358 chip and transistor drive circuit (Q2, Q3 as shown in Figure 2).D1-1 in Fig. 2 is the bridge rectifier (for control circuit provides DC power supply) connected with control transformer secondary.The rectification circuit 61 of main circuit is circuit not shown (but showing its connection port CN2, CN3, CN7).The course of work of whole power circuit is: AC power inputs from CN7, DC power supply is exported from CN1, detection control transformer secondary voltage is used for based on the control circuit of Q1, LM358P, thus judge alternating current be 380 or the output of 220, LM358P for controlling group relay K1-1, K1-2, K2, K3, a K4; For switching the rectification circuit passage of main circuit, when the 380V voltage of CN7 input, relay K 1-1, K1-2, K2, K3 are all failure to actuate, the rectification circuit of main circuit is common bridge rectifier, when the 220V voltage of CN7 input, the equal action of relay, the rectification circuit of main circuit switches to common bridge rectifier+voltage-multiplying circuit, thus realizing same direct voltage output, the VD of the present embodiment is 600V.Wherein thermistor NTC1 to NTC3 is soft starting circuit, and the electric current that can reduce main circuit is surged, and in several seconds time of number when each access power supply, soft starting circuit work, after reaching setting-up time, relay K4 works, and soft starting circuit does not work.The radiator fan of power circuit part is also connected with in circuit diagram.
As shown in Figures 3 to 5, a kind of inverter type welder being provided with double-voltage electric power circuit of the present invention, it comprises the power circuit R of twin voltage, also be provided with squirrel-cage rectifier structure S, squirrel-cage rectifier structure S comprises the cowling panel 1 being located at bottom, be located at the inversion assembly 2 on top and be located at the radiator 3 of two sides, radiator 3 is provided with fin 31 for both sides, centre is provided with the flute profile aluminium of cavity 32, cavity 32 down, said cowling panel 1 is above equipped with in cavity 32, in the present embodiment, electronic device on cowling panel 1 is placed in cavity 32, the body part of cowling panel 1 connects with the lower screws of radiator 3.Inversion assembly 2 wherein comprises inversion plate 21, drive plate 22 and PWM plate 23.In addition, the end of cavity 32 is provided with a fan 4.
Cowling panel 1 is for having the cowling panel structure of integral type output, comprise wiring board body, its wiring board body is provided with the out splice going splice 11,12 of two, and out splice going splice 11,12 and wiring board body are that welded type entirety connects (taking soldering as preferred version).Wherein, out splice going splice 11,12 extends outward 3.5 ~ 5cm from wiring board body.The end of out splice going splice 11,12 is provided with the connection holes 10 for connecting with outer lead (or connector).Out splice going splice 11,12 is the copper sheet (in other embodiment, also can adopt the material such as silver or aluminium, preferentially select copper sheet) that 1 ~ 5mm is thick.In order to improve the good welds of output (i.e. out splice going splice) and wiring board, a pre-manufactured hole 13 (also can be drilled with more than two on demand) can be at least drilled with at the union end of output and wiring board, for the formation of good tin welding spot, form good pad, to reduce the possibility of rosin joint.Output, except straight shape structure, can also adopt the structure with 90 degree of bent angles.As shown in Figure 3.And in order to improve the fastness of welding, can utilize when welding after out splice going splice 11,12 and wiring board body 1 carry out tight joint by pre-joint bolt assembly (mainly comprising screw and nut), then carrying out the welding procedures such as soldering.In addition, out splice going splice 11,12 wherein can also carry out easy-dismount with outside wire (or connector) and connects by being provided with the structures such as draw-in groove, buckle, Quick coupling part.
In sum, the present invention, owing to have employed voltage detecting circuit, detects the voltage of power input, and when detecting that input voltage is 380V, the former limit winding of control transformer selects the 380V union end of acquiescence, and rectification circuit directly connects with power output end; When detecting that input voltage is 220V, the former limit winding of control transformer switches to 220V union end, and between rectification circuit and power output end, access voltage-multiplying circuit, form rectification multiple pressuring circuit, thus ensure that when input power is 220V, the voltage of control circuit and the output end voltage of main circuit, the same when being 380V with input power; Realize the automatic switchover of 380V/220V twin voltage.Inverter type welder of the present invention both have employed the power circuit of twin voltage, also adopt mouse cage type structure, inversion assembly, cowling panel and radiator are wherein combined, and the out splice going splice of cowling panel additionally uses the monolithic construction of the certain distance that stretches out (protruding 3.5 ~ 5cm), inverter type welder of the present invention can be used in the place with 380V or 220V power supply, very convenient; Both there is good radiating effect, made again the line between all parts the shortest; This structure reduces welding machine volume greatly, is conducive to again heat radiation, is conducive to the modularized production of each parts.Cowling panel structure is owing to adopting the output of integral type, extend the distance between output connection holes and wiring board body, thus be conducive to the heat radiation of output, reduce the heating of the connection place of output to the impact of wiring board, reduce the fault of cowling panel, after tested, adopt the cowling panel of this structure, because this output interface failure rate caused of generating heat is zero.
The above only further illustrates technology contents of the present invention with embodiment, so that reader is easier to understand, but does not represent embodiments of the present invention and is only limitted to this, and any technology done according to the present invention extends or recreation, all by protection of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (1)
1. one kind is provided with the inverter type welder of double-voltage electric power circuit, it is characterized in that the power circuit comprising twin voltage, also be provided with squirrel-cage rectifier structure, squirrel-cage rectifier structure comprises the cowling panel bottom being located at, is located at the inversion assembly on top and is located at the radiator of two sides, radiator is the flute profile aluminium that both sides are provided with fin, centre is provided with cavity, cavity down, compartment is equipped with described cowling panel, electronic device on cowling panel is placed in cavity, and the body part of cowling panel connects with the lower screws of radiator; Described inversion assembly comprises inversion plate, drive plate and PWM plate; The end of cavity is provided with a fan; Cowling panel is the cowling panel structure with integral type output, comprises wiring board body, and its wiring board body is provided with two out splice going splices, and out splice going splice and wiring board body are that welded type entirety connects; Wherein, out splice going splice extends outward 3.5 ~ 5cm from wiring board body; The end of out splice going splice is provided with the connection holes for connecting with outer lead or connector; Out splice going splice is the copper sheet that 1 ~ 5mm is thick; At least be drilled with a pre-manufactured hole at the union end of output and wiring board, for the formation of tin welding spot, form pad; Utilize when welding after out splice going splice and wiring board body carry out tight joint by pre-joint bolt assembly, then carry out the welding procedure of soldering; Described out splice going splice also by be provided with draw-in groove, buckle, Quick coupling part structure and outer lead carry out easy-dismount and connect;
The power circuit of described twin voltage, comprise power input and power output end, rectification circuit and voltage-multiplying circuit is in series with between power input and power output end, also comprise the control transformer connected with power input, and the power control circuit, the voltage detecting circuit that connect with control transformer; Power control circuit comprises the first relay be located between power input and control transformer, and is located at the second relay between power input and rectification circuit, voltage-multiplying circuit; Control transformer is provided with 220V former limit winding and 380V former limit winding, and voltage-multiplying circuit comprises the capacitor-resistor circuit of two groups of series connection; The normally-closed contact of the first relay wherein connects with power input, 380V former limit winding, and the normally opened contact of the first relay connects with power input, 220V former limit winding; The normally-closed contact of the second relay connects with the input of power input, rectification circuit, and the normally opened contact of the second relay connects with the series connection point of power input, two groups of capacitor-resistor circuit; Voltage detecting circuit comprises the test side connected with the secondary of control transformer, and the output connected with power control circuit; Voltage stabilizing circuit is provided with between power control circuit and control transformer; Capacitor-resistor circuit comprises electric capacity, the resistance of multiple parallel connection; Also be provided with soft starting circuit between power input and the second relay, power control circuit also comprises the 3rd relay; Soft starting circuit is made up of three thermistors, and the normally opened contact of the 3rd relay is in parallel with thermistor; Voltage stabilizing circuit wherein comprises LM7812 chip, and voltage detecting circuit is triode voltage sample circuit, and power control circuit also comprises operational amplifier LM358P chip and transistor drive circuit;
Rectification circuit wherein comprises rectifier bridge CN2 and rectifier bridge CN3, and for opening the relay K 1 of rectifier bridge CN3;
The course of work of whole power circuit is: AC power inputs from port CN7, DC power supply is exported from port CN1, detection control transformer secondary voltage is used for based on the control circuit of triode Q1, operational amplifier LM358P chip, thus judging that alternating current is 380V or 220V, the output of operational amplifier LM358P chip is for controlling group relay K1-1, K1-2, K1, K2, K3, a K4; For switching the rectification circuit passage of main circuit, when port CN7 is input as 380V voltage, relay K 1-1, K1-2, K1, K2, K3 are all failure to actuate, the rectification circuit of main circuit is bridge rectifier, when port CN7 is input as 220V voltage, the equal action of relay, the rectification circuit of main circuit switches to bridge rectifier and voltage-multiplying circuit, realize same direct voltage output, VD is 600V; Wherein thermistor NTC1 to NTC3 is soft starting circuit, and the electric current reducing main circuit is surged, and in several seconds time of number when each access power supply, soft starting circuit work, after reaching setting-up time, relay K4 works, and soft starting circuit does not work.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137322.7A CN102801205B (en) | 2011-05-25 | 2011-05-25 | Dual-voltage power supply circuit and inverter welding machine comprising same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110137322.7A CN102801205B (en) | 2011-05-25 | 2011-05-25 | Dual-voltage power supply circuit and inverter welding machine comprising same |
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| Publication Number | Publication Date |
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| CN102801205A CN102801205A (en) | 2012-11-28 |
| CN102801205B true CN102801205B (en) | 2015-05-27 |
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| CN201110137322.7A Expired - Fee Related CN102801205B (en) | 2011-05-25 | 2011-05-25 | Dual-voltage power supply circuit and inverter welding machine comprising same |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103480946B (en) * | 2013-09-24 | 2015-04-29 | 永康市帝普特科技有限公司 | Circuit structure of double-voltage welding machine |
| CN107493019A (en) * | 2017-08-21 | 2017-12-19 | 徐东川 | A kind of voltage adaptive control method |
| CN109066961B (en) | 2018-08-24 | 2020-10-30 | 上海沪工焊接集团股份有限公司 | Welding machine dual-power switching control system and method |
| CN111277115A (en) * | 2020-03-10 | 2020-06-12 | 广州亦高电气设备有限公司 | Power supply circuit and power supply of welding equipment and welding equipment |
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| CN201664803U (en) * | 2010-02-04 | 2010-12-08 | 深圳市富驰机电设备有限公司 | DC inverter welding machine with miniaturized structure |
| CN201674274U (en) * | 2010-05-05 | 2010-12-15 | 深圳市佳士科技股份有限公司 | Automatic control circuit of cooling fan |
| CN101944765A (en) * | 2010-11-04 | 2011-01-12 | 深圳市华意隆实业发展有限公司 | Dual-power automatic switching control device for electric welder |
| CN201750358U (en) * | 2010-09-21 | 2011-02-16 | 深圳市华意隆实业发展有限公司 | Inverter welding machine power supply provided with completely-isolated cooling duct |
| CN202103595U (en) * | 2011-05-25 | 2012-01-04 | 深圳市富驰机电设备有限公司 | Double voltage power circuit and inverter welder comprising same |
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2011
- 2011-05-25 CN CN201110137322.7A patent/CN102801205B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101733516A (en) * | 2009-12-04 | 2010-06-16 | 上海广为电器工具有限公司 | Direct-current inverter welding machine with dual supply voltage system |
| CN201664803U (en) * | 2010-02-04 | 2010-12-08 | 深圳市富驰机电设备有限公司 | DC inverter welding machine with miniaturized structure |
| CN201674274U (en) * | 2010-05-05 | 2010-12-15 | 深圳市佳士科技股份有限公司 | Automatic control circuit of cooling fan |
| CN201750358U (en) * | 2010-09-21 | 2011-02-16 | 深圳市华意隆实业发展有限公司 | Inverter welding machine power supply provided with completely-isolated cooling duct |
| CN101944765A (en) * | 2010-11-04 | 2011-01-12 | 深圳市华意隆实业发展有限公司 | Dual-power automatic switching control device for electric welder |
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| CN102801205A (en) | 2012-11-28 |
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