CN102801205A - 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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- CN102801205A CN102801205A CN2011101373227A CN201110137322A CN102801205A CN 102801205 A CN102801205 A CN 102801205A CN 2011101373227 A CN2011101373227 A CN 2011101373227A CN 201110137322 A CN201110137322 A CN 201110137322A CN 102801205 A CN102801205 A CN 102801205A
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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 the power circuit of a kind of pair of voltage, more particularly be meant a kind of power circuit that can connect 380V and two kinds of power supplys of 220V, and by its inverter type welder that constitutes.
Background technology
In the prior art, the power supply of domestic all kinds of electric equipment products uses specification to have two kinds usually, and a kind of is 380V, and a kind of is 220V, for the ease of adopting the power supply of different size, can adopt a manual switch that switches usually, is used to select the power supply of different size.Yet, in the time of manual the switching, go wrong easily, before using, when power supply is switched in the 220V shelves, possibly not have directly to insert the power supply of 380V under the situation about judging such as electric equipment products, this situation can burn out power circuit.In addition owing to adopt the switch of manual switching; Except will before using power supply, carrying out artificial judgment, also need carry out manual operations, program is more miscellaneous; Owing to need to adopt the manual switch that switches; Also cause the structure of power circuit more complicated, cost has also risen, and uses on the contrary to bother more.
Based on the defective of above-mentioned prior art, I develop a kind of power circuit that can between the power supply of two kinds of voltages, switch automatically, and by its inverter type welder that constitutes.
Summary of the invention
The objective of the invention is to for overcoming the defective of prior art, and a kind of power circuit that can between the power supply of two kinds of voltages, switch automatically is provided, and by its inverter type welder that constitutes.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
The power circuit of two voltages; Comprise power input and power output end; Be in series with rectification circuit and voltage-multiplying circuit between power input and the power output end, also comprise the control transformer that connects with power input, and the power control circuit, the voltage detecting circuit that connect with control transformer; Described power control circuit comprises first relay of being located between power input and the control transformer, and is located at second relay between power input and rectification circuit, the voltage-multiplying circuit; Described control transformer is provided with 220V former limit winding and the former limit of 380V winding, and described voltage-multiplying circuit comprises the capacitance resistance circuit of two groups of series connection.
Its further technical scheme is: the normally-closed contact of said first relay connects with power input, the former limit of 380V winding, and the normally opened contact of first relay connects with power input, the former limit of 220V winding; The normally-closed contact of said second relay connects with the input of power input, rectification circuit, and the normally opened contact of second relay connects with the series connection point of power input, two groups of capacitance resistance circuit.
Its further technical scheme is: said voltage detecting circuit comprises the test side that connects with the secondary of control transformer, and the output that connects with power control circuit; Be provided with voltage stabilizing circuit between said power control circuit and the control transformer.
Its further technical scheme is: described capacitance resistance circuit comprises electric capacity, the resistance of a plurality of parallel connections.
Its further technical scheme is: also be provided with soft starting circuit between the described power input and second relay, 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 said the 3rd relay is parallelly connected with thermistor.
Its further technical scheme is: described voltage stabilizing circuit comprises the LM7812 chip, and described voltage detecting circuit is the triode voltage sample circuit, and described power control circuit also comprises LM358 chip and transistor drive circuit.
A kind of inverter type welder that is provided with the double-voltage electric power circuit is characterized in that comprising the power circuit of two voltages.Its further technical scheme is: also be provided with the squirrel-cage rectifier structure; Described squirrel-cage rectifier structure comprises the cowling panel of being located at the bottom, is located at the inversion assembly on top and is located at the radiator of two sides; Described radiator is that both sides are provided with the aluminium section bar that fin, centre are provided with cavity; Described cavity is equipped with aforesaid cowling panel down in the cavity.
Its further technical scheme is: described cowling panel is provided with the out splice going splice more than two, and described out splice going splice is that welded type integral body connects with the cowling panel body.Described out splice going splice extends outward 3.5～5cm from the cowling panel body.
The present invention's beneficial effect compared with prior art is: the present invention is owing to adopted voltage detecting circuit; Voltage to power input detects; When detecting input voltage and being 380V; The former limit winding of control transformer is selected the 380V union end of acquiescence, and rectification circuit directly connects with power output end; When detecting input voltage and be 220V; The former limit winding of control transformer switches to the 220V union end; And between rectification circuit and power output end, insert voltage-multiplying circuit, form rectification multiple pressuring circuit, thereby guaranteed when the input power supply is 220V; The voltage of control circuit and the output end voltage of main circuit are with input power supply the same when being 380V; Realize the automatic switchover of the two voltages of 380V/220V.Inverter type welder of the present invention had both adopted the power circuit of two voltages; Also adopt mouse cage type structure; Wherein inversion assembly, cowling panel and radiator are combined; And the out splice going splice of cowling panel has also adopted the certain distance that stretches out, and (protruding 3.5～5cm) monolithic construction makes inverter type welder of the present invention all can use in the place with 380V or 220V power supply, and is very convenient; Both had better heat radiating effect, and made the line between each parts the shortest again; This structure has been dwindled the welding machine volume greatly, helps heat radiation again, helps the modularization production of each parts.The cowling panel structure is owing to adopt the output of integral type; Prolonged the distance between output connection holes and the wiring board body, thereby helped the heat radiation of output, the heating of connection place that reduces output is to the influence of wiring board; Reduce the fault of cowling panel; Through test, adopt the cowling panel of this structure, the failure rate that causes because of this output interface heating is zero.
Below in conjunction with accompanying drawing and specific embodiment the present invention is further described.
Description of drawings
Fig. 1 is the frame structure sketch map of the power circuit specific embodiment of the two voltages of the present invention;
Fig. 2 is the circuit theory diagrams of the power circuit specific embodiment of the two voltages of the present invention;
Fig. 3 is a kind of inverter type welder specific embodiment block diagram that is provided with the double-voltage electric power circuit of the present invention;
Fig. 4 is a kind of squirrel-cage rectifier structure stereogram that is provided with the inverter type welder specific embodiment of double-voltage electric power circuit of the present invention;
The floor map of the cowling panel of the squirrel-cage rectifier structure of the inverter type welder specific embodiment that Fig. 5 is provided with the double-voltage electric power circuit for the present invention is a kind of.
Description of reference numerals
The T inverter type welder
R power circuit S squirrel-cage rectifier structure
1 cowling panel, 10 connection holes
11 out splice going splices, 12 out splice going splices
13 pre-manufactured holes
2 inversion assemblies, 21 inversion plates
22 drive plates, 23 PWM plates
3 radiators
31 fin, 32 cavitys
4 fans
51 power inputs, 52 power output ends
61 rectification circuits, 62 voltage-multiplying circuits
621,622 capacitance resistance circuit, 623 series connection points
63 soft starting circuits, 71 control transformers
The former limit of winding 712 380V, the former limit of 711 220V winding
72 power control circuits, 721 first relays
722 second relays, 73 voltage detecting circuits
731 test sides, 732 outputs
74 voltage stabilizing circuits
Embodiment
In order more to make much of technology contents of the present invention, below in conjunction with specific embodiment and Figure of description technical scheme of the present invention is further introduced and explanation, but be not limited to this.
As depicted in figs. 1 and 2; The power circuit of the two voltages of the present invention; Comprise power input 51 and power output end 52; Be in series with rectification circuit 61 and voltage-multiplying circuit 62 between power input 51 and the power output end 52, also comprise the control transformer 71 that connects 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 first relay of being located between power input 51 and the control transformer 71 721, and is located at second relay 722 between power input 51 and rectification circuit 61, the voltage-multiplying circuit 62; Control transformer 71 is provided with the former limit of 220V winding 711 and the former limit of 380V winding 712, and voltage-multiplying circuit 62 comprises the capacitance resistance circuit 621,622 of two groups of series connection.
The normally-closed contact of first relay 721 (K1-1 as shown in Figure 2) wherein connects with power input 51, the former limit of 380V winding 712, and the normally opened contact of first relay 721 connects with power input 51, the former limit of 220V winding 711; The normally-closed contact of second relay 722 (being made up of a plurality of relays in the present embodiment) connects with the input of power input 51, rectification circuit 61, and the series connection point 623 of the normally opened contact of second relay 722 and power input 51, two groups of capacitance resistance circuit 621,622 connects.Voltage detecting circuit 73 comprises the test side 731 that connects with the secondary of control transformer 71, and the output 732 that connects with power control circuit 72; Be provided with voltage stabilizing circuit 74 between power control circuit 72 and the control transformer 71.Capacitance resistance circuit 621,622 comprises electric capacity, the resistance of a plurality of parallel connections, like the R101～R108 among Fig. 2 and C101～C108.
Also be provided with soft starting circuit 63 between the power input 51 and second relay 722, power control circuit 72 also comprises the 3rd relay 723.Soft starting circuit 63 is by three thermistors (NTC1 as shown in Figure 2～NTC3) constitute the normally opened contact of the 3rd relay 723 (K4 as shown in Figure 2) and thermistor (NTC1 as shown in Figure 2～NTC3) parallelly connected.
Extremely shown in Figure 5 like Fig. 3, a kind of inverter type welder that is provided with the double-voltage electric power circuit of the present invention, it comprises the power circuit R of two voltages; Also be provided with squirrel-cage rectifier structure S; Squirrel-cage rectifier structure S comprises the cowling panel 1 of being located at the bottom, is located at the inversion assembly 2 on top and is located at the radiator 3 of two sides, and radiator 3 is provided with the flute profile aluminium that fin 31, centre are provided with cavity 32 for both sides, and cavity 32 down; Be equipped with the said cowling panel 1 in front in the cavity 32; In the present embodiment, the electronic device on the cowling panel 1 places in the cavity 32, and the body part of cowling panel 1 is with the bottom screw attachment 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.
In sum, the present invention has been owing to adopted voltage detecting circuit, and the voltage of power input is detected, and when detecting input voltage and being 380V, the former limit winding of control transformer is selected the 380V union end of acquiescence, and rectification circuit directly connects with power output end; When detecting input voltage and be 220V; The former limit winding of control transformer switches to the 220V union end; And between rectification circuit and power output end, insert voltage-multiplying circuit, form rectification multiple pressuring circuit, thereby guaranteed when the input power supply is 220V; The voltage of control circuit and the output end voltage of main circuit are with input power supply the same when being 380V; Realize the automatic switchover of the two voltages of 380V/220V.Inverter type welder of the present invention had both adopted the power circuit of two voltages; Also adopt mouse cage type structure; Wherein inversion assembly, cowling panel and radiator are combined; And the out splice going splice of cowling panel has also adopted the certain distance that stretches out, and (protruding 3.5～5cm) monolithic construction makes inverter type welder of the present invention to use in the place with 380V or 220V power supply, and is very convenient; Both had better heat radiating effect, and made the line between each parts the shortest again; This structure has been dwindled the welding machine volume greatly, helps heat radiation again, helps the modularization production of each parts.The cowling panel structure is owing to adopt the output of integral type; Prolonged the distance between output connection holes and the wiring board body, thereby helped the heat radiation of output, the heating of connection place that reduces output is to the influence of wiring board; Reduce the fault of cowling panel; Through test, adopt the cowling panel of this structure, the failure rate that causes because of this output interface heating is zero.
The above only further specifies technology contents of the present invention with embodiment, so that the reader is more readily understood, but does not represent execution mode of the present invention to only limit to this, anyly extends or recreation according to the technology that the present invention did, and all receives protection of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (10)
1. the power circuit of two voltages; Comprise power input and power output end; It is characterized in that being in series with between power input and the power output end rectification circuit and voltage-multiplying circuit; Also comprise the control transformer that connects with power input, and the power control circuit, the voltage detecting circuit that connect with control transformer; Described power control circuit comprises first relay of being located between power input and the control transformer, and is located at second relay between power input and rectification circuit, the voltage-multiplying circuit; Described control transformer is provided with 220V former limit winding and the former limit of 380V winding, and described voltage-multiplying circuit comprises the capacitance resistance circuit of two groups of series connection.
2. the power circuit of pair voltage according to claim 1 is characterized in that the normally-closed contact of said first relay connects with power input, the former limit of 380V winding, and the normally opened contact of first relay connects with power input, the former limit of 220V winding; The normally-closed contact of said second relay connects with the input of power input, rectification circuit, and the normally opened contact of second relay connects with the series connection point of power input, two groups of capacitance resistance circuit.
3. the power circuit of pair voltage according to claim 2 is characterized in that said voltage detecting circuit comprises the test side that connects with the secondary of control transformer, and the output that connects with power control circuit; Be provided with voltage stabilizing circuit between said power control circuit and the control transformer.
4. the power circuit of pair voltage according to claim 3 is characterized in that described capacitance resistance circuit comprises the electric capacity of a plurality of parallel connections, resistance.
5. the power circuit of pair voltage according to claim 4 is characterized in that also being provided with soft starting circuit between the described power input and second relay, and described power control circuit also comprises the 3rd relay.
6. the power circuit of pair voltage according to claim 5 is characterized in that described soft starting circuit comprises thermistor, and the normally opened contact of said the 3rd relay is parallelly connected with thermistor.
7. the power circuit of pair voltage according to claim 6; It is characterized in that described voltage stabilizing circuit comprises the LM7812 chip; Described voltage detecting circuit is the triode voltage sample circuit, and described power control circuit also comprises LM358 chip and transistor drive circuit.
8. inverter type welder that is provided with the double-voltage electric power circuit is characterized in that comprising the power circuit of each described pair of voltage of claim 1 to 7.
9. the inverter type welder that is provided with the double-voltage electric power circuit according to claim 8; It is characterized in that also being provided with the squirrel-cage rectifier structure; Described squirrel-cage rectifier structure comprises the cowling panel of being located at the bottom, is located at the inversion assembly on top and is located at the radiator of two sides; Described radiator is that both sides are provided with the aluminium section bar that fin, centre are provided with cavity, and described cavity is equipped with aforesaid cowling panel down in the cavity.
10. the inverter type welder that is provided with the double-voltage electric power circuit according to claim 9 is characterized in that described cowling panel is provided with the out splice going splice more than two, and described out splice going splice is that welded type integral body connects with the cowling panel body.Described out splice going splice extends outward 3.5～5cm from the cowling panel body.
Priority Applications (1)
| 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 true CN102801205A (en) | 2012-11-28 |
| CN102801205B CN102801205B (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480946A (en) * | 2013-09-24 | 2014-01-01 | 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 |
| US11192201B2 (en) | 2018-08-24 | 2021-12-07 | Shanghai Hugong Electric (Group) Co., Ltd. | Double-power-supply switching control system for a welding machine and method |
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| 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 |
| 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 |
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| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480946A (en) * | 2013-09-24 | 2014-01-01 | 永康市帝普特科技有限公司 | Circuit structure of double-voltage welding machine |
| 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 |
| US11192201B2 (en) | 2018-08-24 | 2021-12-07 | Shanghai Hugong Electric (Group) Co., Ltd. | Double-power-supply switching control system for a welding machine and method |
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| CN102801205B (en) | 2015-05-27 |
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Denomination of invention: Dual-voltage power supply circuit and inverter welding machine comprising same Effective date of registration: 20160419 Granted publication date: 20150527 Pledgee: Shenzhen City Ming Company limited by guarantee Pledgor: Zhong Zhi Investment Co., Ltd of Shenzhen Registration number: 2016440020001 |
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