CN203826926U - Internal circuit of undervoltage release - Google Patents
Internal circuit of undervoltage release Download PDFInfo
- Publication number
- CN203826926U CN203826926U CN201420178487.8U CN201420178487U CN203826926U CN 203826926 U CN203826926 U CN 203826926U CN 201420178487 U CN201420178487 U CN 201420178487U CN 203826926 U CN203826926 U CN 203826926U
- Authority
- CN
- China
- Prior art keywords
- circuit
- electrically connected
- voltage
- electromagnet
- pressure limiting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses an internal circuit of an undervoltage release. The internal circuit comprises an electromagnet, a driving circuit, and a voltage-limiting circuit electrically connected with commercial power. The electromagnet and the voltage-limiting circuit are both electrically connected with the driving circuit. The driving circuit comprises a power transformation circuit, an amplifying circuit, and a switch circuit. The voltage-limiting circuit and the electromagnet are both electrically connected with the power transformation circuit. The electromagnet and the amplifying circuit are both electrically connected with the switch circuit. The amplifying circuit is also electrically connected with the voltage-limiting circuit. The internal circuit of the undervoltage release amplifies current inputted from the voltage-limiting circuit to the switch circuit with the amplifying circuit so as to be capable of accurately enabling the electromagnet to operate.
Description
Technical field
The utility model relates to a kind of release, relates in particular a kind of internal circuit of device for under-voltage releasing equipment.
Background technology
Release is joined earth leakage protective device; effect is that the vector of the electric current by zero sequence current mutual inductor in the time that circuit has electric leakage or the person to get an electric shock is not equal to zero; two sides of instrument transformer secondary coil produce voltage; and amplify through integrated circuit; in the time reaching setting value;, get an electric shock and leakage protection thereby play at 0.1 second internal cutting off power supply by leakage tripping device.
The operational devices that release internal main is in the market wanted is electromagnet, mix again a simple drive circuit and carry out drive magnet, electromagnet will produce adhesive action, but this structure is easy to occur the reason due to ambient temperature, make electromagnet produce the variation of the needed internal electrical flow valuve of action, the driving voltage that electromagnet can operate so very inaccuracy is easy to occur the problem of false tripping, and the method for existing raising dropout precision is to add a control circuit inside, but control circuit drive circuit complexity, and internal control chip is expensive, will increase like this cost of making release.
Utility model content
The deficiency existing for prior art, the purpose of this utility model is to provide a kind of internal circuit that drives precision device for under-voltage releasing equipment high, with low cost.
For achieving the above object, the utility model provides following technical scheme: a kind of internal circuit of device for under-voltage releasing equipment, comprise electromagnet, drive circuit and the pressure limiting circuit for being electrically connected with civil power, described electromagnet and pressure limiting circuit are all electrically connected with drive circuit, described drive circuit comprises power transformation circuit, amplifying circuit and switching circuit, described pressure limiting circuit and electromagnet are all electrically connected with power transformation circuit, described electromagnet and amplifying circuit are all electrically connected with switching circuit, and amplifying circuit is also electrically connected with pressure limiting circuit.
By adopting technique scheme, in the time that release is linked in civil power, the drive circuit work of will switching on, normal line voltage cannot driving switch circuit, so switching circuit is in closed condition, pressure limiting circuit will limit the voltage that is input to drive circuit, then be sent to power transformation circuit, after power transformation circuit carries out a power transformation effect to it, and then be sent in electromagnet, power to electromagnet, because switching circuit is in closed condition, now electromagnet only has unidirectional pressurization, so inner not electric current passes through, electromagnet does not produce any action, in the time that line voltage changes, first enter amplifying circuit, amplifying circuit will amplify the voltage signal of this variation, after amplifying, enter into again switching circuit, now will open by driving switch circuit, alived in electromagnet inside, allow electromagnet produce action, disconnect civil power, with the electrical equipment in protective circuit, control electromagnet by switching circuit, just can ensure that electromagnet produces action in certain voltage, make the running of electromagnet more accurate.
The utility model is further set to: described pressure limiting circuit comprises diode and several pressure limiting resistance, and described diode is connected successively with pressure limiting resistance.
By adopting technique scheme, by the effect of pressure limiting resistance, the voltage that just civil power can be applied to drive circuit carries out dividing potential drop, so just can reduce civil power and be applied to the voltage of drive circuit, effectively carry out the effect of a pressure limiting to being input to the voltage of drive circuit inside, arranging of diode can effectively prevent recoil inverse current impulse among civil power, and the voltage that makes civil power be input to drive circuit changes.
The utility model is further set to: described power transformation circuit comprises diode, voltage-stabiliser tube, electric capacity and electrochemical capacitor, described electric capacity is electrically connected with pressure limiting circuit, described electric capacity is electrically connected with electromagnet after connecting with diode, the equal and diodes in parallel of described voltage-stabiliser tube and electrochemical capacitor.
By adopting technique scheme, can carry out an effect for step-down again to the output voltage of pressure limiting circuit by electric capacity, stablize the later voltage of step-down by voltage-stabiliser tube afterwards, finally carry out the effect of a filtering by electrochemical capacitor, this voltage can better be powered to electromagnet.
The utility model is further set to: described amplifying circuit comprises integrated transporting discharging chip, resistance and voltage-stabiliser tube, after a resistance of described integrated transporting discharging chip negative pole end series connection, be electrically connected with pressure limiting circuit, ground connection after positive terminal electrical connection voltage-stabiliser tube, output is electrically connected with switching circuit.
By adopting technique scheme, integrated transporting discharging chip just can play the effect of well output voltage of pressure limiting circuit being carried out to an amplification, the setting of resistance and voltage-stabiliser tube simultaneously, can stablize the voltage being applied on integrated transporting discharging chip, so that integrated transporting discharging chip can better be worked.
The utility model is further set to: described switching circuit comprises transistor and two resistance, described transistor collector is electrically connected with electromagnet, after a resistance of base stage electrical connection, be electrically connected with the output of integrated transporting discharging chip, and be also electrically connected ground connection after another resistance, grounded emitter.
By adopting technique scheme, arranging of resistance can be stablized the signal being input in transistor, and increase amplifying circuit is input to the anti-interference of switching circuit internal signal, and transistor can be worked more accurately.
Brief description of the drawings
Fig. 1 is the circuit diagram of the internal circuit of device for under-voltage releasing equipment of the present utility model.
In figure: 1, power transformation circuit; 2, switching circuit; 3, pressure limiting circuit; 4, amplifying circuit; RX, pressure limiting resistance; D, diode; C, electric capacity; CX, electrochemical capacitor; R, resistance; DW, voltage-stabiliser tube; J, integrated transporting discharging chip; Q, transistor; T, electromagnet.
Embodiment
Shown in Fig. 1, the internal circuit of a kind of device for under-voltage releasing equipment of the present embodiment, comprise electromagnet T, drive circuit and the pressure limiting circuit 3 for being electrically connected with civil power, described electromagnet T and pressure limiting circuit 3 are all electrically connected with drive circuit, described drive circuit comprises power transformation circuit 1, amplifying circuit 4 and switching circuit 2, described pressure limiting circuit 3 and electromagnet T are all electrically connected with power transformation circuit 1, described electromagnet T and amplifying circuit 4 are all electrically connected with switching circuit 2, and amplifying circuit 4 is also electrically connected with pressure limiting circuit 3.
By adopting technique scheme, in the time that release is linked in civil power, the drive circuit work of will switching on, normal line voltage cannot driving switch circuit 2, so switching circuit 2 is in closed condition, pressure limiting circuit 3 will limit the voltage that is input to drive circuit, then be sent to power transformation circuit 1, after power transformation circuit 1 carries out a power transformation effect to it, and then be sent in electromagnet T, give electromagnet T power supply, because switching circuit 2 is in closed condition, now electromagnet T only has unidirectional pressurization, so inner not electric current passes through, electromagnet T does not produce any action, in the time that line voltage changes, first enter amplifying circuit 4, amplifying circuit 4 will amplify the voltage signal of this variation, after amplifying, enter into again switching circuit 2, now will open by driving switch circuit 2, alived in electromagnet T inside, allow electromagnet T produce action, disconnect civil power, with the electrical equipment in protective circuit, control electromagnet T by switching circuit 2, just can ensure that electromagnet T produces action in certain voltage, make the running of electromagnet T more accurate.
The utility model is further set to: described pressure limiting circuit 3 comprises diode D and several pressure limiting resistance R X, and described diode D connects successively with pressure limiting resistance R X.
By adopting technique scheme, by the effect of pressure limiting resistance R X, the voltage that just civil power can be applied to drive circuit carries out dividing potential drop, so just can reduce civil power and be applied to the voltage of drive circuit, effectively carry out the effect of a pressure limiting to being input to the voltage of drive circuit inside, arranging of diode D can effectively prevent recoil inverse current impulse among civil power, and the output voltage of pressure limiting circuit 3 is changed, and affected the accuracy of detection of whole circuit to civil power.
Described power transformation circuit 1 comprises diode D, voltage-stabiliser tube DW, capacitor C and electrochemical capacitor CX, described capacitor C is electrically connected with pressure limiting circuit 3, described capacitor C is electrically connected with electromagnet T after connecting with diode D, and described voltage-stabiliser tube DW and electrochemical capacitor CX are all in parallel with diode D.
By adopting technique scheme, can carry out an effect for step-down again to the output voltage of pressure limiting circuit 3 by capacitor C, stablize the later voltage of step-down by voltage-stabiliser tube DW afterwards, finally carry out the effect of a filtering by electrochemical capacitor CX, make this voltage can be better to electromagnet T power supply, the arranging of diode D can effectively prevent recoil electric current the output voltage of pressure limiting circuit 1 is changed.
Described amplifying circuit 4 comprises integrated transporting discharging chip J, resistance R and voltage-stabiliser tube DW, after a resistance R of described integrated transporting discharging chip J negative pole end series connection, is electrically connected with pressure limiting circuit 3, and ground connection after positive terminal electrical connection voltage-stabiliser tube DW, output is electrically connected with switching circuit 2.
By adopting technique scheme, integrated transporting discharging chip J just can play the effect of well output voltage of pressure limiting circuit 3 being carried out to an amplification, so in the time that the output voltage of pressure limiting circuit 3 changes, its variable quantity producing also can be along with amplification, so just can effectively reach the effect that a variable quantity that line voltage is changed amplifies, the setting of resistance R and voltage-stabiliser tube DW simultaneously, can stablize the voltage being applied on integrated transporting discharging chip J power end, so that integrated transporting discharging chip J can better work, it is LM324 integrated transporting discharging chip J that the integrated transporting discharging chip J here adopts model.
Described switching circuit 2 comprises transistor Q and two resistance R, described transistor Q collector electrode is electrically connected with electromagnet T, after a resistance R of base stage electrical connection, be electrically connected with the output of integrated transporting discharging chip J, and be also electrically connected ground connection after another resistance R, grounded emitter.
By adopting technique scheme, in the time that changing appears in line voltage, the output voltage of pressure limiting circuit 3 also can change, the output voltage of amplifying circuit 4 also can change, will make like this voltage that is input to transistor Q base stage also change, transistor Q will conducting like this, electromagnet T will alive inside, like this electromagnet T will produce magnetic force carry out one thread off action, arranging of resistance R can be stablized the signal being input in transistor Q simultaneously, increase the anti-interference that amplifying circuit 4 is input to switching circuit 2 internal signals, transistor Q can be worked more accurately, here transistor Q adopts the NPN triode that model is 9013.
The utlity model has following advantage: the internal circuit of device for under-voltage releasing equipment of the present utility model, the electric current that pressure limiting circuit 3 is input to switching circuit 2 by amplifying circuit 4 amplifies, and so just can be able to make accurately electromagnet T to produce action, in the time that release is linked in civil power, the drive circuit work of will switching on, normal line voltage cannot driving switch circuit 2, so switching circuit 2 is in closed condition, pressure limiting circuit 3 will limit the voltage that is input to drive circuit, then be sent to power transformation circuit 1, after power transformation circuit 1 carries out a power transformation effect to it, and then be sent in electromagnet T, give electromagnet T power supply, because switching circuit 2 is in closed condition, now electromagnet T only has unidirectional pressurization, so inner not electric current passes through, electromagnet T does not produce any action, in the time that line voltage changes, first enter amplifying circuit 4, amplifying circuit 4 will amplify the voltage signal of this variation, after amplifying, enter into again switching circuit 2, now will open by driving switch circuit 2, alived in electromagnet T inside, allow electromagnet T produce action, disconnect civil power, with the electrical equipment in protective circuit, control electromagnet T by switching circuit 2, just can ensure that electromagnet T produces action in certain voltage, make the running of electromagnet T more accurate.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. the internal circuit of a device for under-voltage releasing equipment, comprise electromagnet, drive circuit and the pressure limiting circuit for being electrically connected with civil power, described electromagnet and pressure limiting circuit are all electrically connected with drive circuit, it is characterized in that: described drive circuit comprises power transformation circuit, amplifying circuit and switching circuit, described pressure limiting circuit and electromagnet are all electrically connected with power transformation circuit, described electromagnet and amplifying circuit are all electrically connected with switching circuit, and amplifying circuit is also electrically connected with pressure limiting circuit.
2. the internal circuit of device for under-voltage releasing equipment according to claim 1, is characterized in that: described pressure limiting circuit comprises diode and several pressure limiting resistance, and described diode is connected successively with pressure limiting resistance.
3. the internal circuit of device for under-voltage releasing equipment according to claim 2, it is characterized in that: described power transformation circuit comprises diode, voltage-stabiliser tube, electric capacity and electrochemical capacitor, described electric capacity is electrically connected with pressure limiting circuit, described electric capacity is electrically connected with electromagnet after connecting with diode, the equal and diodes in parallel of described voltage-stabiliser tube and electrochemical capacitor.
4. the internal circuit of device for under-voltage releasing equipment according to claim 3, it is characterized in that: described amplifying circuit comprises integrated transporting discharging chip, resistance and voltage-stabiliser tube, after a resistance of described integrated transporting discharging chip negative pole end series connection, be electrically connected with pressure limiting circuit, ground connection after positive terminal electrical connection voltage-stabiliser tube, output is electrically connected with switching circuit.
5. the internal circuit of device for under-voltage releasing equipment according to claim 4, it is characterized in that: described switching circuit comprises transistor and two resistance, described transistor collector is electrically connected with electromagnet, after a resistance of base stage electrical connection, be electrically connected with the output of integrated transporting discharging chip, and be also electrically connected ground connection after another resistance, grounded emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420178487.8U CN203826926U (en) | 2014-04-14 | 2014-04-14 | Internal circuit of undervoltage release |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420178487.8U CN203826926U (en) | 2014-04-14 | 2014-04-14 | Internal circuit of undervoltage release |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203826926U true CN203826926U (en) | 2014-09-10 |
Family
ID=51482389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420178487.8U Expired - Fee Related CN203826926U (en) | 2014-04-14 | 2014-04-14 | Internal circuit of undervoltage release |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203826926U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099852A (en) * | 2016-08-01 | 2016-11-09 | 华通机电股份有限公司 | Anti-interference earth leakage protective chip |
| CN106159892A (en) * | 2016-09-27 | 2016-11-23 | 吴文炤 | A kind of circuit structure of intelligent leakage circuit breaker |
-
2014
- 2014-04-14 CN CN201420178487.8U patent/CN203826926U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106099852A (en) * | 2016-08-01 | 2016-11-09 | 华通机电股份有限公司 | Anti-interference earth leakage protective chip |
| CN106159892A (en) * | 2016-09-27 | 2016-11-23 | 吴文炤 | A kind of circuit structure of intelligent leakage circuit breaker |
| CN106159892B (en) * | 2016-09-27 | 2019-01-22 | 吴文炤 | A kind of circuit structure of intelligent leakage circuit breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203798886U (en) | Current sampling circuit | |
| CN203313079U (en) | Synchronous rectification circuit | |
| CN205123588U (en) | It turns over to keep apart swashs formula high frequency switching power supply and input voltage detection circuitry thereof | |
| CN203826926U (en) | Internal circuit of undervoltage release | |
| CN203963189U (en) | Be applied to the self locking type control circuit that valve is controlled | |
| CN203849632U (en) | Microcurrent measurement amplifying circuit | |
| CN202533526U (en) | General test circuit of switch sensor or solenoid valve | |
| CN204740058U (en) | Electric -magnetic flow meter proper motion is to excitation coil's insulation resistance test circuit | |
| CN203595790U (en) | Passive switch isolation detection apparatus | |
| CN203800564U (en) | Multi-stage leakage protector | |
| CN201788202U (en) | Electronic load circuit | |
| CN203691282U (en) | Duty-ratio adjustable, period-fixed, and isolation-control bipolarity high-frequency high-voltage pulse power supply circuit | |
| CN104836316B (en) | A kind of constant-current charging circuit of adjustable current | |
| CN204131483U (en) | Low-loss hyper tape isolated drive circuit | |
| CN103499734B (en) | Lead-acid battery charger rapid and handy formula tester | |
| CN204556725U (en) | The miniature power consumption pick-up unit of electrical equipment | |
| CN203800563U (en) | Novel undervoltage release internal circuit | |
| CN202712884U (en) | Battery connection detecting circuit and battery charger | |
| CN103575962B (en) | Passive peak value follower circuit | |
| CN104617789A (en) | Simple power circuit | |
| CN203572869U (en) | Passive peak value follower circuit | |
| CN204481699U (en) | The simple power circuit of a kind of structure | |
| CN203688696U (en) | Volt-ampere characteristic tester | |
| CN104639128A (en) | Anti-interference timing switch circuit | |
| CN204010883U (en) | A kind of simple and easy demagnetization circuit |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20170414 |