CN203949962U - The low-cost inverter type welder detecting device for output current of a kind of isolated form - Google Patents
The low-cost inverter type welder detecting device for output current of a kind of isolated form Download PDFInfo
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- CN203949962U CN203949962U CN201320892537.4U CN201320892537U CN203949962U CN 203949962 U CN203949962 U CN 203949962U CN 201320892537 U CN201320892537 U CN 201320892537U CN 203949962 U CN203949962 U CN 203949962U
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- 238000005070 sampling Methods 0.000 claims abstract description 29
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000009466 transformation Effects 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000000844 transformation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The utility model provides a kind of isolated form low-cost inverter type welder detecting device for output current, comprise current signal sampling unit and current signal processing unit, this device adopts low cost current mutual inductor to realize the isolation sampling of main circuit and testing circuit, then by signal processing circuit, detects the output current of electric welding machine.The utlity model has signal isolation, good in anti-interference performance; Sampling power consumption is little, and thermal stability is good; Circuit is simple, without integrated circuit and bipolar power supply, reliable operation; The feature such as with low cost.
Description
Technical field
The utility model relates to a kind of electric welding machine, especially a kind of pick-up unit of inverter type welder output current.
Background technology
Inverter type welder is in order to realize various welding technologys, need the output current that detects in real time electric welding machine so that welding current is accurately controlled, at present the normal current sample devices such as shunt or Hall element that adopt detect electric welding machine output current from electric welding machine output terminal, but adopt shunt to have the problems such as the large and interference free performance of power consumption is poor; Adopt Hall element need to adopt bipolar power supply power supply, have the problems such as the high and signal processing circuit relative complex of cost.
Utility model content
The utility model is for above shortcomings in prior art, provide a kind of isolated form low-cost inverter type welder detecting device for output current, this device adopts low cost current mutual inductor to realize the isolation sampling of main circuit and testing circuit, then by signal processing circuit, detects the output current of electric welding machine.
The utility model is achieved through the following technical solutions.
The utility model relates to the low-cost inverter type welder detecting device for output current of a kind of isolated form, comprise current signal sampling unit and current signal processing unit, it is characterized in that the isolation that utilizes low cost current mutual inductor to realize main circuit and testing circuit by described current signal sampling unit samples, the output current of the electric circuit inspection electric welding machine by described current signal processing unit again, the circuit of wherein said current signal sampling unit and input circuit and output circuit are isolated completely.
Described current signal sampling unit comprises current transformer L1, commutation diode D1～D4, sampling resistor R1, does not need operational amplifier or comparer integrated circuit.
Described current signal processing unit comprises triode Q1 and Q2, resistance R 2～R4, capacitor C 1.
Described current signal sampling unit utilizes mutual inductor L1 to be set on main-transformer lead-in wire, detect the elementary or secondary current of transformer, through commutation diode D1～D4, the current signal of L1 sampling is carried out to full-bridge rectification, after being converted to voltage signal to current signal, exports to R1 the triode Q1 base stage of described current signal processing unit, current signal is through triode Q1, after resistance R 2 impedance transformations, export to again triode Q2 base stage, current signal is again through triode Q2, resistance R 3, after capacitor C 1 impedance transformation, through resistance R 4 outputs, be proportional to the good current feedback signal of linearity of welding current.
Described triode Q1 and triode Q2 adopt complementary type to pipe.
The utility model compared with prior art, has following technique effect:
1, signal isolation, good in anti-interference performance;
2, sampling power consumption is little, and thermal stability is good;
3, circuit is simple, without integrated circuit and bipolar power supply, reliable operation;
4, with low cost.
Accompanying drawing explanation
Fig. 1 is the principle schematic of embodiment of the present utility model;
In figure: 1 is that current signal sampling unit, 2 is that current signal processing unit, L1 are that current sensor, D1～D4 are that fast-recovery commutation diode, Q1 are that positive-negative-positive triode, Q2 are that NPN type triode, R1 are that sampling resistor, R2 are that Q1 pull-up resistor, R3 are that Q2 pull-up resistor, R4 are signal output resistance.
Embodiment
In order to make technological means of the present utility model, creation characteristic and to reach object, be easy to understand understanding, below in conjunction with accompanying drawing, the utility model illustrated in further detail.
The utility model is achieved through the following technical solutions.
1 the electric circuit constitute of the present utility model is described with reference to the accompanying drawings.The utility model relates to the low-cost inverter type welder detecting device for output current of a kind of isolated form, comprise current signal sampling unit 1 and current signal processing unit 2, it is characterized in that the isolation that utilizes low cost current mutual inductor to realize main circuit and testing circuit by described current signal sampling unit 1 samples, the output current of the electric circuit inspection electric welding machine by described current signal processing unit 2 again, the circuit of wherein said current signal sampling unit 1 and input circuit and output circuit are isolated completely.
In Fig. 1, current signal sampling unit 1 comprises current transformer L1, commutation diode D1～D4, sampling resistor R1, does not need operational amplifier or comparer integrated circuit; Current signal processing unit 2 comprises triode Q1 and Q2, resistance R 2～R4, capacitor C 1.
As shown in Figure 1, current signal sampling unit 1 utilizes mutual inductor L1 to be set on main-transformer lead-in wire, detect the elementary or secondary current of transformer, through commutation diode D1～D4, the current signal of L1 sampling is carried out to full-bridge rectification, after being converted to voltage signal to current signal, exports to R1 the triode Q1 base stage of current signal processing unit 2, current signal is through triode Q1, after resistance R 2 impedance transformations, export to again triode Q2 base stage, current signal is again through triode Q2, resistance R 3, after capacitor C 1 impedance transformation, through resistance R 4 outputs, be proportional to the good current feedback signal of linearity of welding current.
Triode Q1 and triode Q2 adopt complementary type to pipe.
The utility model compared with prior art, has following technique effect: signal isolation, good in anti-interference performance; Sampling power consumption is little, and thermal stability is good; Simply, without integrated circuit and bipolar power supply, reliable operation; With low cost.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. the low-cost inverter type welder detecting device for output current of an isolated form, comprise current signal sampling unit and current signal processing unit, it is characterized in that the isolation that utilizes low cost current mutual inductor to realize main circuit and testing circuit by described current signal sampling unit samples, the output current of the electric circuit inspection electric welding machine by described current signal processing unit again, the circuit of wherein said current signal sampling unit and input circuit and output circuit are isolated completely;
Described current signal sampling unit comprises current transformer L1, commutation diode D1～D4, sampling resistor R1, does not need operational amplifier or comparer integrated circuit;
Described current signal processing unit comprises triode Q1 and Q2, resistance R 2～R4, capacitor C 1.
2. the low-cost inverter type welder detecting device for output current of isolated form according to claim 1, described current signal sampling unit utilizes mutual inductor L1 to be set on main-transformer lead-in wire, detect the elementary or secondary current of transformer, through commutation diode D1～D4, the current signal of L1 sampling is carried out to full-bridge rectification, after being converted to voltage signal to current signal, exports to R1 the triode Q1 base stage of described current signal processing unit, current signal is through triode Q1, after resistance R 2 impedance transformations, export to again triode Q2 base stage, current signal is again through triode Q2, resistance R 3, after capacitor C 1 impedance transformation, through resistance R 4 outputs, be proportional to the good current feedback signal of linearity of welding current.
3. the low-cost inverter type welder detecting device for output current of isolated form according to claim 2, described triode Q1 and triode Q2 adopt complementary type to pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892537.4U CN203949962U (en) | 2013-12-31 | 2013-12-31 | The low-cost inverter type welder detecting device for output current of a kind of isolated form |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320892537.4U CN203949962U (en) | 2013-12-31 | 2013-12-31 | The low-cost inverter type welder detecting device for output current of a kind of isolated form |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203949962U true CN203949962U (en) | 2014-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320892537.4U Expired - Lifetime CN203949962U (en) | 2013-12-31 | 2013-12-31 | The low-cost inverter type welder detecting device for output current of a kind of isolated form |
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| Country | Link |
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| CN (1) | CN203949962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456232A (en) * | 2019-09-02 | 2019-11-15 | 北京智芯微电子科技有限公司 | The low-power current detection circuit of the independent powering mode of fault detector battery |
-
2013
- 2013-12-31 CN CN201320892537.4U patent/CN203949962U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456232A (en) * | 2019-09-02 | 2019-11-15 | 北京智芯微电子科技有限公司 | The low-power current detection circuit of the independent powering mode of fault detector battery |
| CN110456232B (en) * | 2019-09-02 | 2021-07-27 | 北京智芯微电子科技有限公司 | Low-power-consumption current detection circuit of fault indicator battery independent power supply mode |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141119 |
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| CX01 | Expiry of patent term |