CN201436776U - Inverting circuit and corresponding rectified filter circuit and inverter resistance welding machine - Google Patents
Inverting circuit and corresponding rectified filter circuit and inverter resistance welding machine Download PDFInfo
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- CN201436776U CN201436776U CN2009200572950U CN200920057295U CN201436776U CN 201436776 U CN201436776 U CN 201436776U CN 2009200572950 U CN2009200572950 U CN 2009200572950U CN 200920057295 U CN200920057295 U CN 200920057295U CN 201436776 U CN201436776 U CN 201436776U
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Abstract
An inverting circuit comprises an input power supply for providing three-phase input sine wave, a rectified filter circuit connected with the input power supply, an insulated gate bipolar transistor circuit and an output circuit, wherein the rectified filter circuit comprises one or more impedance units which are in series connection. The impedance unit comprises two or more nonpolar capacitors and resistors which are in parallel connection. A rectified filter circuit having the characteristic impedance unit for the inverting circuit, and an inverter resistance welding machine employing the inverting circuit are also disclosed. The utility model has the characteristics of small calorific power of the capacitor, little performance deviation of the capacitor, good stability of the rectified filter circuit and the whole inverting circuit, high welding stability of the inverter resistance welding machine, and small failure rate.
Description
Technical field
The utility model relates to a kind of inverter circuit, relates in particular to a kind of current rectifying and wave filtering circuit and the inversion electric resistance welder with this inverter circuit of inverter circuit.
Background technology
Inverter circuit is widely used in various industries as industrial power, as industries such as plating, electrolysis and electric welding.Existing inverter circuit adopts igbt (IGBT Insulated Gate BipolarTransistor) inverter circuit to realize usually.Prior art inverter circuit basic circuit diagram is as shown in Figure 1: three-phase main-frequency alternating current (50/60Hz) is passed through current rectifying and wave filtering circuit 10 and igbt circuit 20 successively, be transformed into the intermediate frequency square wave current of 1000HZ by igbt circuit 20, again after the intermediate frequency welding transformer step-down in output circuit 30, by output DC stream behind the power rectifier diode rectification in the output circuit 30.
Usually, current rectifying and wave filtering circuit is formed one group of electric capacity by a plurality of electrochemical capacitor series and parallels, realizes filtering and power back-off.Yet, the current rectifying and wave filtering circuit of this structure is when seam welds continuously, the temperature rise of electric capacity is bigger, cause the life-span of electric capacity to shorten greatly, cause that the inverter circuit failure rate is higher, inversion electric resistance welder welding stability with this inverter circuit is relatively poor, influences and hindered the performance of inversion electric resistance welder greatly.
Therefore, at the prior art deficiency, provide the inversion electric resistance welder that a kind of welding is more stable, failure rate is lower very necessary, and to realize this purpose, must overcome the defective of existing current rectifying and wave filtering circuit from the source, provide a kind of when continuous seam weldering, the current rectifying and wave filtering circuit that the electric capacity temperature rise the is less and inverter circuit that constitutes of current rectifying and wave filtering circuit is particularly necessary thus.
Summary of the invention
The utility model is to avoid prior art not enough and a kind of caloric value is less, temperature rise is lower when seam weldering continuously current rectifying and wave filtering circuit and inverter circuit that constitutes thus and the inversion electric resistance welder with this inverter circuit be provided.
A kind of inverter circuit of the present utility model, adopt following technical scheme:
A kind of inverter circuit, comprise and provide the input of three-phase input sine wave power supply, the current rectifying and wave filtering circuit that is connected with described input power supply, igbt circuit and the output circuit that is connected with current rectifying and wave filtering circuit, described current rectifying and wave filtering circuit to comprise one group or one group of above impedance unit.
Further, described impedance unit comprises two or more the polarity free capacitor that is connected in parallel.
Further, described impedance unit also comprises and described polarity free capacitor parallel resistor.
Preferably, be connected in series between the described impedance unit.
The current rectifying and wave filtering circuit that is used for above-mentioned inverter circuit that the utility model provides, adopt following technical scheme:
A kind of current rectifying and wave filtering circuit that is used for above-mentioned inverter circuit, described current rectifying and wave filtering circuit comprise one group or one group of above impedance unit.
Further, described impedance unit comprises two or more the polarity free capacitor that is connected in parallel.
Further, be connected in series between the described impedance unit.
The inversion electric resistance welder that the utility model provides, adopt following technical scheme:
A kind of inversion electric resistance welder, comprise welding machine main body, positive electrode output, negative electrode output and operating circuit, described operating circuit is the inverter circuit of above-mentioned feature, and described inverter circuit is arranged in the welding machine main body and provides welding current for described positive electrode output and negative electrode output.
Further, the impedance unit in the described inverter circuit comprises two or more the polarity free capacitor that is connected in parallel, and described impedance unit also comprises and described polarity free capacitor parallel resistor.
Further, be connected in series between the described impedance unit.
The inverter circuit that the utility model provides, what its current rectifying and wave filtering circuit adopted is polarity free capacitor, because the speed that discharges and recharges of polarity free capacitor is fast, the electrochemical capacitor that adopts in the temperature rise compared to existing technology of electric capacity when seam welds continuously significantly reduces, and the caloric value of electric capacity is very little, and the aberrations in property of electric capacity is very small, therefore, current rectifying and wave filtering circuit stability is better, and correspondingly, the stability of whole inverter circuit is also better.In addition, because polarity free capacitor caloric value when continuous seam weldering is less, the life-span of the electrochemical capacitor in compared to existing technology in the life-span of electric capacity is greatly improved, and the failure rate of circuit also so greatly reduces really.And the welding stability of inversion electric resistance welder with this circuit is also higher, and failure rate is also less.
Description of drawings
The utility model is described in further detail to utilize accompanying drawing, but the embodiment in the accompanying drawing does not constitute any restriction of the present utility model.
Fig. 1 is a prior art inverter circuit circuit diagram;
Fig. 2 is a kind of inverter circuit circuit diagram of the utility model;
Fig. 3 is a kind of inverter circuit circuit diagram of the utility model;
Fig. 4 is the cutaway view of a kind of inversion electric resistance welder of the utility model.
Embodiment
Reaching specific embodiment in conjunction with the accompanying drawings is further described the utility model.
Be illustrated in figure 2 as a kind of inverter circuit of the present utility model, comprise the input of three-phase input sine wave power supply, the current rectifying and wave filtering circuit 10 that is connected with described input power supply, the igbt circuit 20 that is connected with current rectifying and wave filtering circuit and output circuit 30 are provided, described current rectifying and wave filtering circuit 10 comprises impedance unit 11, the number of impedance unit 11 is at least one, and can increase its number according to actual needs.The sine wave of three-phase input power supply converts direct current to behind current rectifying and wave filtering circuit 10 rectifying and wave-filterings, convert the intermediate frequency square wave again behind insulated gate bipolar transistor circuit 20 to, is flowed by output circuit 30 output DCs.Impedance unit 11 comprises four polarity free capacitors and resistance that is connected in parallel.The number that constitutes the shunt capacitance of impedance unit 11 also decides according to actual conditions, and is relevant with the voltage that inverter circuit need provide.Because impedance unit 11 employings is polarity free capacitor, therefore, this polarity free capacitor caloric value when seam welds continuously is few, and the performance of electric capacity is more stable, and current rectifying and wave filtering circuit 10 stability are better, and correspondingly, the stability of whole inversion electricity circuit is also better.Simultaneously, the life-span of electric capacity is longer, and the stability of the inverter circuit of Gou Chenging is also better thus.
Figure 3 shows that another kind of inverter circuit of the present utility model, it also comprises provides the input of three-phase input sine wave power supply, the current rectifying and wave filtering circuit 10 that is connected with described input power supply, the igbt circuit 20 that is connected with current rectifying and wave filtering circuit and output circuit 30, described current rectifying and wave filtering circuit 10 comprises two impedance units that are connected in series 111 and impedance unit 112, and this circuit can provide lower voltage.The setting of impedance unit number determines with actual use occasion.
The current rectifying and wave filtering circuit that the utility model provides as Fig. 2, shown in Figure 3, comprises one group or one group of above impedance unit, if impedance unit is connected in series between the impedance unit more than two.Each impedance unit comprises two or more the polarity free capacitor that is connected in parallel, and also comprises and the polarity free capacitor parallel resistor.Because what current rectifying and wave filtering circuit adopted is polarity free capacitor, because the speed that discharges and recharges of polarity free capacitor is fast, the electrochemical capacitor that adopts in the temperature rise compared to existing technology of electric capacity when seam welds continuously significantly reduces, the caloric value of electric capacity is very little, the aberrations in property of electric capacity is very small, therefore, the life-span of electric capacity is long, and current rectifying and wave filtering circuit stability better.
As shown in Figure 4, the inversion electric resistance welder embodiment that provides for the utility model, comprise welding machine main body 800, positive electrode output 801, negative electrode output 802 and inverter circuit 803, inverter circuit 803 is arranged in the welding machine main body 800, and the output loading of inverter circuit 803 is connected with negative electrode output 802 with positive electrode output 801 respectively.When putting into the metal welding fitting between positive electrode output 801 and the negative electrode output 802, positive electrode output 801 and negative electrode output 802 form the loop through the metal welding fitting, and the metal welding fitting is equivalent to the welding resistance in loop.The position of positive electrode output 801 and negative electrode output 802 is interchangeable among the figure, does not influence the work of inversion electric resistance welder.Influenced by seam weldering continuously little because the inverter circuit that this inversion electric resistance welder adopts has, and stability is high, and therefore, this inversion electric resistance welder has advantages such as good stability, welding quality height, failure rate are low.
Should be noted that at last: above embodiment is only in order to the explanation the technical solution of the utility model; but not to the restriction of the utility model protection range; although utility model has been done detailed explanation with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement the technical solution of the utility model, and not break away from the essence and the scope of technical solutions of the utility model.
Claims (10)
1. inverter circuit, comprise the input of three-phase input sine wave power supply, the current rectifying and wave filtering circuit that is connected with described input power supply, igbt circuit and the output circuit that is connected with current rectifying and wave filtering circuit are provided, it is characterized in that: described current rectifying and wave filtering circuit comprises one group or one group of above impedance unit.
2. inverter circuit according to claim 1 is characterized in that: described impedance unit comprises two or more the polarity free capacitor that is connected in parallel.
3. inverter circuit according to claim 2 is characterized in that: described impedance unit also comprises and described polarity free capacitor parallel resistor.
4. inverter circuit according to claim 1 is characterized in that: be connected in series between the described impedance unit.
5. current rectifying and wave filtering circuit that is used for inverter circuit as claimed in claim 1 is characterized in that: described current rectifying and wave filtering circuit comprises one group or one group of above impedance unit.
6. current rectifying and wave filtering circuit according to claim 5 is characterized in that: described impedance unit comprises two or more the polarity free capacitor that is connected in parallel.
7. current rectifying and wave filtering circuit according to claim 5 is characterized in that: be connected in series between the described impedance unit.
8. inversion electric resistance welder, comprise welding machine main body, positive electrode output, negative electrode output and operating circuit, it is characterized in that, described operating circuit is an inverter circuit as claimed in claim 1, and described inverter circuit is arranged in the welding machine main body and provides welding current for described positive electrode output and negative electrode output.
9. inversion electric resistance welder according to claim 8 is characterized in that: the impedance unit in the described inverter circuit comprises two or more the polarity free capacitor that is connected in parallel, and described impedance unit also comprises and described polarity free capacitor parallel resistor.
10. inverter circuit according to claim 8 is characterized in that: be connected in series between the described impedance unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200572950U CN201436776U (en) | 2009-05-26 | 2009-05-26 | Inverting circuit and corresponding rectified filter circuit and inverter resistance welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200572950U CN201436776U (en) | 2009-05-26 | 2009-05-26 | Inverting circuit and corresponding rectified filter circuit and inverter resistance welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201436776U true CN201436776U (en) | 2010-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200572950U Expired - Lifetime CN201436776U (en) | 2009-05-26 | 2009-05-26 | Inverting circuit and corresponding rectified filter circuit and inverter resistance welding machine |
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| CN (1) | CN201436776U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079009A (en) * | 2010-12-30 | 2011-06-01 | 哈尔滨工业大学 | Device for monitoring positive and negative half-wave asymmetry of primary current of transformer in resistance welding machine |
| CN102133676A (en) * | 2011-01-25 | 2011-07-27 | 深圳华意隆电气股份有限公司 | Voltage-type PWM (pulse-width modulation) half-bridge hard switching inversion-type welding and cutting machine |
| CN107222124A (en) * | 2017-07-14 | 2017-09-29 | 成都科衡环保技术有限公司 | A kind of high-voltage pulse power source that plasma is produced for discharge in water |
-
2009
- 2009-05-26 CN CN2009200572950U patent/CN201436776U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102079009A (en) * | 2010-12-30 | 2011-06-01 | 哈尔滨工业大学 | Device for monitoring positive and negative half-wave asymmetry of primary current of transformer in resistance welding machine |
| CN102133676A (en) * | 2011-01-25 | 2011-07-27 | 深圳华意隆电气股份有限公司 | Voltage-type PWM (pulse-width modulation) half-bridge hard switching inversion-type welding and cutting machine |
| CN102133676B (en) * | 2011-01-25 | 2013-06-05 | 深圳华意隆电气股份有限公司 | Voltage-type PWM (pulse-width modulation) half-bridge hard switching inversion-type welding and cutting machine |
| CN107222124A (en) * | 2017-07-14 | 2017-09-29 | 成都科衡环保技术有限公司 | A kind of high-voltage pulse power source that plasma is produced for discharge in water |
| CN107222124B (en) * | 2017-07-14 | 2023-06-16 | 成都科衡环保技术有限公司 | High-voltage pulse power supply for generating plasma by liquid phase discharge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGZHOU HERON MACHINE + ELECTRIC CO., LTD. Free format text: FORMER NAME: GUANGZHOU (CONGHUA) HERON MACHINE + ELECTRIC INDUSTRIAL CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 510990, No. 9, abundance Road, Taiping economic and Technological Development Zone, Conghua, Guangdong, Guangzhou Patentee after: Heron Machine & Electric Inductrial Co., Ltd. Address before: 510990, No. 9, abundance Road, Taiping economic and Technological Development Zone, Conghua, Guangdong, Guangzhou Patentee before: Guangzhou (Conghua) Heron Machine & Electric Industrial Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510990, No. 9, abundance Road, Taiping economic and Technological Development Zone, Conghua, Guangdong, Guangzhou Patentee after: HERON INTELLIGENT EQUIPMENT CO., LTD. Address before: 510990, No. 9, abundance Road, Taiping economic and Technological Development Zone, Conghua, Guangdong, Guangzhou Patentee before: Heron Machine & Electric Inductrial Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100407 |
|
| CX01 | Expiry of patent term |