CN107658844A - A kind of single-phase input voltage owes overprotection circuit - Google Patents
A kind of single-phase input voltage owes overprotection circuit Download PDFInfo
- Publication number
- CN107658844A CN107658844A CN201711085788.0A CN201711085788A CN107658844A CN 107658844 A CN107658844 A CN 107658844A CN 201711085788 A CN201711085788 A CN 201711085788A CN 107658844 A CN107658844 A CN 107658844A
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- China
- Prior art keywords
- circuit
- pin
- phase input
- photoelectrical coupler
- fet
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- 239000003990 capacitor Substances 0.000 claims description 6
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims description 2
- 238000003466 welding Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
Landscapes
- Control Of Electrical Variables (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention provides a kind of single-phase input voltage to owe overprotection circuit, belongs to electric welding machine circuit technical field.This single-phase input voltage owes overprotection circuit, including single phase input, output end, rectification circuit, filter circuit, photoelectrical coupler U1, U2, FET Q1 and relay K1, rectification circuit and filter circuit are parallel with input, 1 pin and 2 pin for being parallel with photoelectrical coupler U1 and U2 on filter circuit respectively connect and to form loop, photoelectrical coupler U2 4 pin are connected with DC+24V, photoelectrical coupler U2 3 pin be connected with photoelectrical coupler U1 4 pin and while be connected to FET Q1 grid, 3 pin of the photoelectrical coupler U1 are connected with FET Q1 source electrode, FET Q1 drain electrode connection relay K1, the relay K1 other end is applied with DC+24V, the folding of described relay K1 control signal N lines.The present invention has the advantages of automaticity is high, and security performance is more preferable.
Description
Technical field
The invention belongs to electric welding machine circuit technical field, is related to a kind of protection circuit, more particularly to a kind of single-phase input electricity
Pressure owes overprotection circuit.
Background technology
Under-voltage protection：If input voltage reduces very serious, according to:Power P=U*I formula understand that voltage U diminishes, electricity
Stream I can become big, and voltage U is smaller, and electric current I can be bigger on circuit.In power P one regularly, if voltage drops to original half, that
Electric current will raise into twice before.According to Joule's law:Caloric value Q=I2*R*T, any device resistance R on circuit
Certain, if voltage drop by half, then the caloric value Q of circuit unit interval can become before 4 times.
It follows that voltage decline is more, electronic device caloric value is bigger, and electronic device heat accumulation is if more than
The speed of thermal diffusion, device temperature meeting more and more higher, it is possible to the accident such as on fire can be caused.
Therefore, a protection device is set in circuit, when power supply circuit voltage drops to certain voltage value, led to
Relay disconnection is crossed, protection equipment, this circuit is cut off, ensures the safety of the device and equipment on whole loop, this is just cried
Under-voltage protection function
Overvoltage protection:When referring to the over proof maximum of welding machine incoming line voltage, a kind of protected mode for disconnecting power supply,
Referring to all may be to the hurtful dangerous voltage of welding equipment.
With the development of science and technology, electric power, electronic product increasingly variation, complication, sets in each electronic product
Putting the circuit protection trend of overvoltage protection and under-voltage protection increasingly strengthens, in order to improve the reliability of product, so would generally draw
Enter the protection circuits such as some under-voltage, over-pressed, excessively stream, overheats.Under-voltage, overvoltage detector is mainly used to the power supply electricity of monitoring system
Pressure, when supply voltage is too low or too high, a control signal deactivation protection circuit is exported, avoids welder system part from producing
Raw damage, it is ensured that its normal operation.
The content of the invention
The purpose of the present invention is to be directed to the above-mentioned problems in the prior art, there is provided a kind of protection circuit is in input electricity
Force down in AC150V or during higher than AC270V, owe, overvoltage crowbar action power-off, after voltage to be entered recovers normal condition,
Machine is resumed work automatically, so as to protect the safe to use of electrical equipment, reliably avoid electrical equipment damage and can
The disaster that can be brought.
The purpose of the present invention can be realized by following technical proposal：A kind of single-phase input voltage owes overprotection circuit, bag
Single phase input, output end, rectification circuit, filter circuit, photoelectrical coupler U1, U2, FET Q1 and relay K1 are included, its
It is characterised by, rectification circuit and filter circuit is parallel with described input, light is parallel with respectively on described filter circuit
Electric coupler U1 connects to form loop with U2 1 pin and 2 pin, and 4 pin of the photoelectrical coupler U2 are connected with DC+24V, the light
Electric coupler U2 3 pin are connected with photoelectrical coupler U1 4 pin and while are connected to FET Q1 grid, the photoelectricity coupling
Clutch U1 3 pin are connected with FET Q1 source electrode, the drain electrode connection relay K1 of the FET Q1, the relay
The K1 other end is applied with DC+24V, the folding of described relay K1 control signal N lines.
In a kind of above-mentioned single-phase input voltage owes overprotection circuit, described rectification circuit includes commutation diode
D1、D2。
In a kind of above-mentioned single-phase input voltage owes overprotection circuit, described filter circuit include filter capacitor C1,
C2。
In a kind of above-mentioned single-phase input voltage owes overprotection circuit, divide between described rectification circuit and filter circuit
Current-limiting resistance R1, R3 and piezo-resistance RV2, RV1 are not connected with.
In a kind of above-mentioned single-phase input voltage owes overprotection circuit, described photoelectrical coupler U1 and FET Q1
Between be parallel with voltage-regulator diode Z1 and filter capacitor C3.
In a kind of above-mentioned single-phase input voltage owes overprotection circuit, on the N lines of the input with relay K1 it
Between overvoltage protection resistance RT1 in parallel.
Compared with prior art, this single-phase input voltage, which owes overprotection circuit, has automaticity high, and security performance is more
The advantages of good.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of this protection circuit.
Embodiment
It is the specific embodiment of the present invention and with reference to accompanying drawing below, technical scheme is further described,
But the present invention is not limited to these embodiments.
As shown in figure 1, this single-phase input voltage owes overprotection circuit, including single phase input, output end, rectification circuit,
Filter circuit, photoelectrical coupler U1, U2, FET Q1 and relay K1, rectification circuit and filtered electrical are parallel with input
Road, the line voltage of input input first pass through rectifying and wave-filtering processing, be parallel with respectively on filter circuit photoelectrical coupler U1 and
U2 1 pin and 2 pin connects to form loop, and photoelectrical coupler U2 4 pin are connected with DC+24V, photoelectrical coupler U2 3 pin and light
Electric coupler U1 4 pin connection is simultaneously connected to FET Q1 grid simultaneously, photoelectrical coupler U1 3 pin and FET Q1
Source electrode connection, FET Q1 drain electrode connection relay K1, the relay K1 other end is applied with DC+24V, relay K1
The folding of control signal N lines.
Due to input line voltage deficiency or welding machine internal factor cause input IN L, the ends of IN N bis- voltage low pressure
AC150V, piezo-resistance RV1 bis- terminal voltage are less than 150V, therefore piezo-resistance is not turned on, and is not turned on photoelectrical coupler U2,
FET Q1 is not turned on, and makes relay K1 not adhesives, therefore without output voltage supply successive load, successive load not work
Make.
After input voltage is higher than AC150, input voltage IN L are after commutation diode D1, D2 rectification, by resistance
R1 current limlitings, after electric capacity C1 filtering, it is added to the pin of photoelectrical coupler U2 1 and flows through 2 pin to IN N-terminals formation loop, make photoelectric coupling
Device U2 forward conductions, DC+24V voltages flow through the 3rd pin from photoelectrical coupler U2 the 4th pin, by resistance R2, voltage-regulator diode
After Z1 voltage stabilizings, then after electric capacity C3 filtering, FET Q1 grid is added to, turns on FET Q1, main relay
K1 adhesives, output circuit have voltage output, and late-class circuit starts normal work.
When input voltage is higher than 270V, input voltage IN L are after commutation diode D1, D2 rectification, by resistance
R3 current limlitings, after electric capacity C2 filtering, it is added to the pin of photoelectrical coupler U1 1 and flows through 2 pin to IN N-terminals formation loop, make photoelectric coupling
Device U1 forward conductions, FET Q1 grid step voltage is flowed through 3 pin through the pin of photoelectrical coupler 4 and drawn to ground, Q1 grid step voltage
It is low, end FET Q1, relay K1 disconnects, and late-class circuit does not work, and is effectively protected late-class circuit.
Further describe in detail, rectification circuit includes commutation diode D1, D2, and filter circuit includes filter capacitor C1, C2, rectification
Current-limiting resistance R1, R3 and piezo-resistance RV2, RV1, photoelectrical coupler U1 and field effect are connected between circuit and filter circuit
Voltage-regulator diode Z1 and filter capacitor C3 should be parallel between pipe Q1, the overvoltage in parallel between relay K1 on the N lines of input
Protective resistance RT1.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology belonging to the present invention is led
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (6)
1. a kind of single-phase input voltage owes overprotection circuit, including single phase input, output end, rectification circuit, filter circuit, light
Electric coupler U1, U2, FET Q1 and relay K1, it is characterised in that be parallel with described input rectification circuit and
Filter circuit, photoelectrical coupler U1 and U2 1 pin are parallel with respectively on described filter circuit and 2 pin connect and to form loop, institute
4 pin for stating photoelectrical coupler U2 are connected with DC+24V, and 3 pin of the photoelectrical coupler U2 are connected with photoelectrical coupler U1 4 pin
And FET Q1 grid is connected to simultaneously, 3 pin of the photoelectrical coupler U1 are connected with FET Q1 source electrode, described
FET Q1 drain electrode connection relay K1, the relay K1 other end are applied with DC+24V, described relay K1
The folding of control signal N lines.
2. a kind of single-phase input voltage according to claim 1 owes overprotection circuit, it is characterised in that described rectified current
Road includes commutation diode D1, D2.
3. a kind of single-phase input voltage according to claim 1 owes overprotection circuit, it is characterised in that described filtered electrical
Road includes filter capacitor C1, C2.
4. a kind of single-phase input voltage according to claim 1 owes overprotection circuit, it is characterised in that described rectified current
Current-limiting resistance R1, R3 and piezo-resistance RV2, RV1 are connected between road and filter circuit.
5. a kind of single-phase input voltage according to claim 1 owes overprotection circuit, it is characterised in that described photoelectricity coupling
Voltage-regulator diode Z1 and filter capacitor C3 are parallel between clutch U1 and FET Q1.
6. a kind of single-phase input voltage according to claim 1 owes overprotection circuit, it is characterised in that described input
N lines between relay K1 overvoltage protection resistance RT1 in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711085788.0A CN107658844B (en) | 2017-11-07 | 2017-11-07 | Single-phase input voltage underovercurrent protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711085788.0A CN107658844B (en) | 2017-11-07 | 2017-11-07 | Single-phase input voltage underovercurrent protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107658844A true CN107658844A (en) | 2018-02-02 |
| CN107658844B CN107658844B (en) | 2024-07-02 |
Family
ID=61120690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711085788.0A Active CN107658844B (en) | 2017-11-07 | 2017-11-07 | Single-phase input voltage underovercurrent protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107658844B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237137A (en) * | 2007-01-30 | 2008-08-06 | 鸿富锦精密工业（深圳）有限公司 | Over voltage and under-voltage device |
| KR20100052640A (en) * | 2008-11-11 | 2010-05-20 | 한국전기연구원 | Protection circuit of power supply applied junction field effect transistor |
| CN103094877A (en) * | 2011-10-28 | 2013-05-08 | 西门子公司 | Undervoltage-overvoltage protection device and method |
| CN204118685U (en) * | 2014-09-11 | 2015-01-21 | 浙江正泰电器股份有限公司 | Overvoltage and under-voltage protection tripper |
| CN104577968A (en) * | 2015-02-05 | 2015-04-29 | 上海和宗焊接设备制造有限公司 | Three-phase overvoltage, under-voltage and default phase integrated protection circuit |
| WO2017062715A1 (en) * | 2015-10-08 | 2017-04-13 | Hubbell Incorporated | Surge protective device with abnormal overvoltage protection |
| CN207339239U (en) * | 2017-11-07 | 2018-05-08 | 浙江颐顿机电有限公司 | A kind of single-phase input voltage owes overprotection circuit |
-
2017
- 2017-11-07 CN CN201711085788.0A patent/CN107658844B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237137A (en) * | 2007-01-30 | 2008-08-06 | 鸿富锦精密工业（深圳）有限公司 | Over voltage and under-voltage device |
| KR20100052640A (en) * | 2008-11-11 | 2010-05-20 | 한국전기연구원 | Protection circuit of power supply applied junction field effect transistor |
| CN103094877A (en) * | 2011-10-28 | 2013-05-08 | 西门子公司 | Undervoltage-overvoltage protection device and method |
| CN204118685U (en) * | 2014-09-11 | 2015-01-21 | 浙江正泰电器股份有限公司 | Overvoltage and under-voltage protection tripper |
| CN104577968A (en) * | 2015-02-05 | 2015-04-29 | 上海和宗焊接设备制造有限公司 | Three-phase overvoltage, under-voltage and default phase integrated protection circuit |
| WO2017062715A1 (en) * | 2015-10-08 | 2017-04-13 | Hubbell Incorporated | Surge protective device with abnormal overvoltage protection |
| CN207339239U (en) * | 2017-11-07 | 2018-05-08 | 浙江颐顿机电有限公司 | A kind of single-phase input voltage owes overprotection circuit |
Non-Patent Citations (2)
| Title |
|---|
| 王展英: "一种基站远端电源的设计", 科技资讯, no. 20, pages 70 - 71 * |
| 陈本竹: "一种过压欠压保护器的分析及其新应用", 电工电气, no. 12, pages 36 - 38 * |
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| Publication number | Publication date |
|---|---|
| CN107658844B (en) | 2024-07-02 |
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