CN103809073B - Phase loss and chassis grounding detecting device of welding machine - Google Patents
Phase loss and chassis grounding detecting device of welding machine Download PDFInfo
- Publication number
- CN103809073B CN103809073B CN201410056025.3A CN201410056025A CN103809073B CN 103809073 B CN103809073 B CN 103809073B CN 201410056025 A CN201410056025 A CN 201410056025A CN 103809073 B CN103809073 B CN 103809073B
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- welding machine
- phase
- optocoupler
- detecting device
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Abstract
Disclosed is a phase loss and chassis ground detecting device of a novel welding machine. The phase loss and chassis grounding detecting device of the novel welding machine control the power source of the welding machine through an electronic detection technology. According to the technical scheme, two phases of the three-phase power source are connected to the input end of a control transformer, and the other phase of the three-phase power source is connected to a detecting circuit; the detecting circuit comprises a diode V1, resistors R1, R2 and R3, an optocoupler U1 and an LED (light emitting diode), the third phase is connected with the input end of the optocoupler U1 through a current-limiting unit, an auxiliary power terminal is connected with the output end of the optocoupler U1 through the resistor R2, the output end of the optocoupler U1 is connected with the LED through the resistor R3, and the positive electrode of the LED is connected with the control unit of the welding machine. The CCC (China Compulsory certification) requires that the power chassis of the welding machine must be grounded reliably, which is neglected by most of users, and accordingly, great inconvenience and insecurity is brought to the users of the welding machine, while the phase loss and chassis grounding detecting device of the novel welding machine can completely avoid the problem above.
Description
Technical field
The present invention relates to welding equipment, more particularly, to one kind detect with the instruction of input power phase shortage and chassics earth protection
The welding machine of device.
Background technology
Welding machine manufacturing enterprise is a lot of at present, and its product is also different, because industrial welding machine electric power is all three-phase three-wire system
Input power；The lack detection circuit of three-phase three-wire system power supply is cumbersome and degree of accuracy is inadequate, so the weldering of a big chunk producer
Electromechanical source does not all have phase shortage instruction and protects, and requires the welding machine electric power casing must according to China compulsion certiffication system (ccc)
Need reliable ground, but a lot of users have neglected this point again now, and this brings very big inconvenient and safe hidden to welding machine user
Suffer from；Also a lot of negative effects are brought to welding machine manufacturing firm.
Content of the invention
The purpose of the present invention is for welding machine electric power whether phase shortage and whether reliable ground problem, by detection of electrons skill
Art, butt welding electromechanical source is controlled, the detection to improve butt welding machine input power with this and safe class,
Thus reaching the purpose that user is reliable, use safely, the technical solution used in the present invention is:
A kind of phase shortage of welding machine and chassics earth detection means, is characterized in that: the biphase Access Control in three phase mains becomes
Depressor input；Measure loop is not accessed with the third phase controlling transformator to be connected, measure loop includes two poles in three phase mains
Pipe v1, resistance r1～r3, optocoupler u1 and light emitting diode led, third phase is connected with the input of optocoupler u1 by restricted portion,
Accessory power supply terminal is connected with the outfan of optocoupler u1 by resistance r2, and optocoupler u1 outfan passes through resistance r3 and light emitting diode
Led connects, and the anode of light emitting diode led is connected with the control section of welding machine.
Phase shortage according to described welding machine and chassics earth detection means, the negative electrode of described optocoupler u1 picks shell, described
Restricted portion be to be in series with resistance r1 by diode v1.
This technology is welding machine electric power technical field, and phase shortage butt welding machine power supply brings very big infringement, also can increase electrical network
Three-phase imbalance, largely effects on welding performance simultaneously；Chassics earth point reliable ground, is state compulsion certified product system
(ccc) the necessarily requiring of security.Welding machine electric power casing is substantially metal shell, has high pressure in welding machine electric power, due to weldering
Electromechanical source working environment, often and very badly it is easy to cause high pressure to leak electricity, if the unreliable ground connection of welding machine electric power, can give user
Personal safety brings very big potential risk.The present invention can prevent the problems referred to above completely.
Brief description
Fig. 1 is the functional-block diagram of new welder phase shortage and chassics earth detection means.
Fig. 2 is the circuit diagram of new welder phase shortage and chassics earth detection means.
Specific embodiment
As Fig. 1, because welding machine electric power adopts three line three-phase system input powers, in power supply, there is no zero line, welding machine electric power due to
Being related to control section, so there being control transformator (low-tension transformer), controlling transformator to take biphase, if having one during this is biphase
Phase phase shortage, control section does not have accessory power supply, then welding machine electric power nor work, and this is biphase to have default-phase protection function.Therefore,
This biphase open-phase protection is without consideration it is only necessary to consider third phase phase shortage problem.It is the former of ac220v using civil power and big ground voltage
Reason, is detected with chassics earth point to third phase, if third phase phase shortage or chassics earth point any point are not reliably connected, lacks
Phase/unearthed protection display lamp is just bright, and turns off the output of welding machine electric power, so that welding machine electric power is quit work.
As shown in Fig. 2 when having one phase shortage phenomenon mutually occurs in v phase and w phase in three-phase input power supply, just controlling transformator t1
Can not work, accessory power supply+15b and -15b just do not have, then welding machine just quits work；
When phase shortage situation in u phase, then optocoupler u1 does not work, then accessory power supply+15b by resistance r2, r3 drive phase shortage/
Unearthed display lamp light emitting diode led work, phase shortage/unearthed indication light diode led work, remind user to occur lacking
Phase phenomenon, simultaneously another road of resistance r3 control signal be connected to panel pwm control chip, close isolation drive signal, make once
Medium frequency inverter power device does not work, thus reaching the purpose closing welding machine electric power output.
When u phase not phase shortage, casing does not have the situation of reliable ground, and input power u phase passes through diode v1, resistance r1, light
Coupling u1 picks shell, and because casing does not have reliable ground, this circuit can not form loop, and optocoupler u1 does not work, phase shortage/unearthed finger
Show that light emitting diode led lights, remind user that phase shortage or unearthed phenomenon occur.
When u phase not phase shortage, casing reliable ground, input power u phase is connect by diode v1, resistance r1, optocoupler u1, casing
Place formation loop, optocoupler u1 works, and electric capacity c7 enables to make the stable work of optocoupler u1.Accessory power supply+15b passes through resistance
, to reference point ground, phase shortage/unearthed indication light diode led do not light, and another road of resistance r3 control signal arrives for r2, optocoupler u1
Panel opens the output of welding machine electric power, welding machine electric power normal work.
The present invention is source of welding current technical field, and by electric detective technology, butt welding machine power supply, circuit is simple, new
Grain husk, reliability.Input power carried out with pile defection solve welding machine electric power causing welding machine faulty due to power input phase shortage
Illusion, and casing reliable ground is detected, so that welder's Danger Electric shock risk is substantially reduced, the purpose that personal safety is protected.
Claims (1)
1. a kind of phase shortage of welding machine and chassics earth detection means it is characterised in that: the biphase Access Control in three phase mains becomes
Depressor input；Measure loop is not accessed with the third phase controlling transformator to be connected, measure loop includes two poles in three phase mains
Pipe v1, resistance r1～r3, optocoupler u1 and light emitting diode led, third phase is connected with the input of optocoupler u1 by restricted portion,
Accessory power supply terminal is connected with the outfan of optocoupler u1 by resistance r2, and optocoupler u1 outfan passes through resistance r3 and light emitting diode
Led anode connects, and the anode of light emitting diode led is connected with the control section of welding machine；
The negative electrode of described optocoupler u1 picks shell, and described restricted portion is to be in series with resistance r1 by diode v1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410056025.3A CN103809073B (en) | 2014-02-19 | 2014-02-19 | Phase loss and chassis grounding detecting device of welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410056025.3A CN103809073B (en) | 2014-02-19 | 2014-02-19 | Phase loss and chassis grounding detecting device of welding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103809073A CN103809073A (en) | 2014-05-21 |
| CN103809073B true CN103809073B (en) | 2017-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410056025.3A Expired - Fee Related CN103809073B (en) | 2014-02-19 | 2014-02-19 | Phase loss and chassis grounding detecting device of welding machine |
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| CN (1) | CN103809073B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112564460A (en) * | 2020-12-14 | 2021-03-26 | 广东美的厨房电器制造有限公司 | Drive control device, control method, device, cooking appliance and storage medium |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050083513A (en) * | 2004-02-23 | 2005-08-26 | 서재성 | Phase discriminator |
| US7480124B2 (en) * | 2007-01-31 | 2009-01-20 | Rockwell Automation Technologies, Inc. | Detection of an AC input phase-loss on a multi-phase AC servo drive |
| CN101509946A (en) * | 2009-01-09 | 2009-08-19 | 上海新时达电气股份有限公司 | Phase-lacking and power down detecting method for three phase AC input power supply |
| CN202111456U (en) * | 2011-05-30 | 2012-01-11 | 唐山松下产业机器有限公司 | Open-phase detection protection circuit |
| CN202393839U (en) * | 2011-12-28 | 2012-08-22 | 上海施能电器设备厂 | Circuit jointly used for synchronous default phase detection of control power supply and three-phase power supply |
| CN203062057U (en) * | 2013-01-28 | 2013-07-17 | 上海米勒焊接设备有限公司 | Input default phase protection circuit for electric welding machine |
| CN203241481U (en) * | 2013-04-12 | 2013-10-16 | 保定优科电气科技有限责任公司 | Middle-high voltage open-phase detecting alarm |
| CN203720296U (en) * | 2014-02-19 | 2014-07-16 | 山东润合焊接设备有限公司 | New type welding machine open-phase and housing grounding detection device |
-
2014
- 2014-02-19 CN CN201410056025.3A patent/CN103809073B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050083513A (en) * | 2004-02-23 | 2005-08-26 | 서재성 | Phase discriminator |
| US7480124B2 (en) * | 2007-01-31 | 2009-01-20 | Rockwell Automation Technologies, Inc. | Detection of an AC input phase-loss on a multi-phase AC servo drive |
| CN101509946A (en) * | 2009-01-09 | 2009-08-19 | 上海新时达电气股份有限公司 | Phase-lacking and power down detecting method for three phase AC input power supply |
| CN202111456U (en) * | 2011-05-30 | 2012-01-11 | 唐山松下产业机器有限公司 | Open-phase detection protection circuit |
| CN202393839U (en) * | 2011-12-28 | 2012-08-22 | 上海施能电器设备厂 | Circuit jointly used for synchronous default phase detection of control power supply and three-phase power supply |
| CN203062057U (en) * | 2013-01-28 | 2013-07-17 | 上海米勒焊接设备有限公司 | Input default phase protection circuit for electric welding machine |
| CN203241481U (en) * | 2013-04-12 | 2013-10-16 | 保定优科电气科技有限责任公司 | Middle-high voltage open-phase detecting alarm |
| CN203720296U (en) * | 2014-02-19 | 2014-07-16 | 山东润合焊接设备有限公司 | New type welding machine open-phase and housing grounding detection device |
Non-Patent Citations (1)
| Title |
|---|
| NBM-350晶体管脉冲焊机缺相保护电路的分析与改进;李庆愚等;《电焊机》;20011231;第31卷(第8期);第42-43页 * |
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| CN103809073A (en) | 2014-05-21 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170125 Termination date: 20180219 |