CN202667880U - Voltage doubling rectifying circuit of inverted direct-current welding machine - Google Patents
Voltage doubling rectifying circuit of inverted direct-current welding machine Download PDFInfo
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- CN202667880U CN202667880U CN 201220397066 CN201220397066U CN202667880U CN 202667880 U CN202667880 U CN 202667880U CN 201220397066 CN201220397066 CN 201220397066 CN 201220397066 U CN201220397066 U CN 201220397066U CN 202667880 U CN202667880 U CN 202667880U
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Abstract
The utility model discloses a voltage doubling rectifying circuit of an inverted direct-current welding machine, which comprises a power supply circuit and a detection circuit, wherein the power supply circuit comprises a first rectifier bridge, a relay, as well as a first capacitor and a second capacitor that are connected with each other in series; and the first rectifier bridge is connected with the first capacitor and the second capacitor that are connected with each other in series; the detection circuit is connected with the power supply circuit and comprises a voltage comparator; one input end of the voltage comparator is connected with a bleeder circuit; the other input end of the voltage comparator is connected with the input end of the detection circuit; and the output end of the voltage comparator is connected with a switching triode that is connected with a coil of the relay. According to the voltage doubling rectifying circuit of the inverted direct-current welding machine, the detection circuit is used for judging whether voltage of the power supply circuit is 220V or 380V, and whether line connection to run the voltage doubling rectifying circuit or not is controlled according to a judging result; and the inverted direct-current welding machine can operate normally at 220V or 380V.
Description
Technical field
The utility model relates to direct-current inverter welding machine, is specifically related to the voltage doubling rectifing circuit of direct-current inverter welding machine.
Background technology
The direct-current inverter welding machine of selling in the market, operating voltage is AC220V or AC380V, operating voltage is single, scope of application underaction, limitation is larger.For this situation, the electric welding machine that can be suitable for AC220V and AC380V receives consumers in general's concern, and this class electric welding machine of selling on the market is also more and more, but its general rear class conversion regime that adopts the conversion transformer primary turns.In the use procedure, exist following shortcoming, when conversion is undesired, secondary output voltage is too high or too low, the faults such as arcing or current interruption may appear in welding, the requirement that its stability and reliability all can't satisfying the markets, and higher fault rate is brought more impact to distributors and manufacturing commercial city.
The utility model content
The purpose of this utility model is to provide a kind of voltage doubling rectifing circuit of direct-current inverter welding machine, can effectively solve direct-current inverter welding machine fault rate height in the prior art, the technical problem of poor stability.
The utility model to achieve these goals, the technical solution of employing is:
The voltage doubling rectifing circuit of direct-current inverter welding machine, comprise power supply circuits and testing circuit, described power supply circuits comprise the first rectifier bridge, relay and the first electric capacity that is in series and the second electric capacity, and the first rectifier bridge is connected with the second electric capacity with the first electric capacity that is in series; The stationary contact of described relay is connected with the first rectifier bridge, and movable contact is connected with the common port of the first electric capacity with the second electric capacity; Described testing circuit is connected with power supply circuits, testing circuit comprises voltage comparator, an input of voltage comparator is connected with bleeder circuit, the input of another input connection detection circuit, the output connecting valve triode of voltage comparator, switch triode connects the coil of relay.
Preferably, the input of described testing circuit comprises successively the transformer that connects, the second rectifier bridge, and dc voltage stabilizer, and described dc voltage stabilizer is connected with the input of voltage comparator.
Preferably, the in-phase input end of described voltage comparator is connected with bleeder circuit, and inverting input is connected with dc voltage stabilizer.
The beneficial effects of the utility model:
The voltage doubling rectifing circuit of this kind direct-current inverter welding machine is to judge that by testing circuit power supply circuits voltage is 220V or 380V, connects whether move voltage doubling rectifing circuit according to the judged result control circuit, to guarantee the electric welding machine normal operation.Thereby realized that direct-current inverter welding machine can work under 220V or two kinds of voltages of 380V, versatility strengthens, and circuit structure is simple, and operation stability is high.
Description of drawings
Fig. 1 is the circuit theory diagrams of the voltage doubling rectifing circuit of direct-current inverter welding machine.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated:
In conjunction with Fig. 1, the voltage doubling rectifing circuit of direct-current inverter welding machine, comprise power supply circuits and testing circuit, described power supply circuits comprise that the first rectifier bridge B1, relay J and the first capacitor C 1 that is in series and the second capacitor C 2, the first rectifier bridge B1 are connected with the second capacitor C 2 with the first capacitor C 1 that is in series; The stationary contact of described relay J is connected with the first rectifier bridge B1, and movable contact is connected with the common port of the first capacitor C 1 and the second capacitor C 2; Described testing circuit is connected with power supply circuits, testing circuit comprises voltage comparator A, the in-phase input end of voltage comparator A is connected with bleeder circuit, inverting input is connected with dc voltage stabilizer IC, the output connecting valve triode TR of voltage comparator A, switch triode TR connects the coil of relay.The input of described testing circuit comprises successively the transformer T, the second rectifier bridge B2 that connect, and dc voltage stabilizer IC, and described dc voltage stabilizer IC is connected with the input of voltage comparator A.
The electric welding machine power supply circuits are pressed the AC380V In-put design, do not move voltage doubling rectifing circuit during input AC380V, and output DC550V DC voltage is supplied with inversion unit behind the first rectifier bridge rectifying and wave-filtering, makes its normal operation.When inputting AC220V, judge through testing circuit, the operation voltage doubling rectifing circuit, output voltage is that the DC voltage of DC630V is supplied with inversion unit, also can work, thus the automatic identification function of two kinds of voltages of realization direct-current inverter welding machine.
The concrete course of work is: when power supply circuits have the voltage input, output voltage behind transformer, the second rectifier bridge output dc voltage is then behind dc voltage stabilizer, the inverting input of input voltage comparator compares with the reference voltage of in-phase input end.
When the input voltage Uin of power supply circuits is AC380V, voltage comparator output output low level, not conducting of switch triode, not adhesive of relay, the input voltage of power supply circuits first rectifier bridge of directly flowing through, output voltage U out is DC550V.When the input voltage Uin of power supply circuits is AC220V, voltage comparator output output high level, switch triode conducting, the relay adhesive, a circuit of power supply circuits is connected with the common port of the first electric capacity with the second electric capacity, forms voltage doubling rectifing circuit, and output voltage U out is DC630V.
Thereby realized that direct-current inverter welding machine can work under 220V or two kinds of voltages of 380V, versatility strengthens, and circuit structure is simple, and operation stability is high.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also should belong to protection domain of the present utility model.
Claims (3)
1. the voltage doubling rectifing circuit of direct-current inverter welding machine, it is characterized in that, comprise power supply circuits and testing circuit, described power supply circuits comprise the first rectifier bridge, relay and the first electric capacity that is in series and the second electric capacity, and the first rectifier bridge is connected with the second electric capacity with the first electric capacity that is in series; The stationary contact of described relay is connected with the first rectifier bridge, and movable contact is connected with the common port of the first electric capacity with the second electric capacity; Described testing circuit is connected with power supply circuits, testing circuit comprises voltage comparator, an input of voltage comparator is connected with bleeder circuit, the input of another input connection detection circuit, the output connecting valve triode of voltage comparator, switch triode connects the coil of relay.
2. the voltage doubling rectifing circuit of direct-current inverter welding machine according to claim 1, it is characterized in that, the input of described testing circuit comprises successively the transformer that connects, the second rectifier bridge, and dc voltage stabilizer, and described dc voltage stabilizer is connected with the input of voltage comparator.
3. the voltage doubling rectifing circuit of direct-current inverter welding machine according to claim 2 is characterized in that, the in-phase input end of described voltage comparator is connected with bleeder circuit, and inverting input is connected with dc voltage stabilizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220397066 CN202667880U (en) | 2012-08-10 | 2012-08-10 | Voltage doubling rectifying circuit of inverted direct-current welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220397066 CN202667880U (en) | 2012-08-10 | 2012-08-10 | Voltage doubling rectifying circuit of inverted direct-current welding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202667880U true CN202667880U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220397066 Expired - Fee Related CN202667880U (en) | 2012-08-10 | 2012-08-10 | Voltage doubling rectifying circuit of inverted direct-current welding machine |
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| CN (1) | CN202667880U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104625333A (en) * | 2014-12-12 | 2015-05-20 | 杭州凯尔达电焊机有限公司 | Novel DC/AC arc welding device |
-
2012
- 2012-08-10 CN CN 201220397066 patent/CN202667880U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104625333A (en) * | 2014-12-12 | 2015-05-20 | 杭州凯尔达电焊机有限公司 | Novel DC/AC arc welding device |
| CN104625333B (en) * | 2014-12-12 | 2016-06-01 | 杭州凯尔达电焊机有限公司 | A kind of novel DC/AC arc welding equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20210810 |
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| CF01 | Termination of patent right due to non-payment of annual fee |