CN201584748U - Electromagnetic leakage switch - Google Patents
Electromagnetic leakage switch Download PDFInfo
- Publication number
- CN201584748U CN201584748U CN2009202824119U CN200920282411U CN201584748U CN 201584748 U CN201584748 U CN 201584748U CN 2009202824119 U CN2009202824119 U CN 2009202824119U CN 200920282411 U CN200920282411 U CN 200920282411U CN 201584748 U CN201584748 U CN 201584748U
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- positive feedback
- switch
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Abstract
The utility model provides an electromagnetic leakage switch, which comprises a leakage induce unit, a voltage-multiplying rectifying unit, a positive feedback drive unit and a switch unit, wherein the leakage induce unit is used for inducing a leakage signal, converting the leakage signal into a voltage signal, and transmitting the voltage signal to the voltage-multiplying rectifying unit so as to obtain at least one time of DC voltage after rectifying and filtering to be inputted into the positive feedback drive unit, and the positive feedback drive unit is used for outputting the excited largest circuit current to the switch unit to cut off an electric power supply of a protected circuit. Therefore, the electromagnetic leakage switch effectively avoids electrical shock hazards caused by electricity leakage, and has simple structure, low cost and high power system interference resistance.
Description
Technical field
The utility model belongs to the earth leakage circuit-breaker field, relates in particular to a kind of electromagnetic leakage switch.
Background technology
Along with improving constantly of people's quality of life, electronics, electric equipment products have entered huge numbers of families, are also progressively strengthening for the protection person and the awareness of safety of equipment, and the requirement to protection switch of all kinds simultaneously also improves constantly.Employed in the market earth leakage circuit-breaker divides electronic type and electromagnetic type two big classes, the electronic type leakage switch with crystal amplifier as intermediary agency, pass to relay after when electric leakage takes place, amplifying by amplifier, make its deenergization by relay control switch, but transistor withstands shocks ability a little less than, anti-environmental interference is poor, needs back work power supply (electron-amplifier generally needs tens volts DC power supply), makes leakage current characteristic be subjected to the influence of operating voltage fluctuation; When the main circuit phase shortage, protector can lose defencive function.And the electromagnetic leakage switch with magnetictrip as intermediary agency, when leakage current takes place, make mechanism's dropout deenergization, switch electromagnetic component strong interference immunity of this type and shock resistance (overcurrent and superpotential impact) ability is strong; Do not need accessory power supply, but shortcoming is: cost height, manufacture craft require complicated.So prior art exists not enough, need the lower electromagnetic leakage switch of a kind of cost of exploitation.
The utility model content
The purpose of this utility model is, consumed power not when the defective that exists at above-mentioned prior art provides a kind of normal operation, and cost is lower, the electromagnetic leakage switch that anti-Disturbance in Power Net is strong.
The technical solution of the utility model is as follows: a kind of electromagnetic leakage switch; comprise the electric leakage sensing unit; switch element; it is characterized in that: also comprise voltage multiplying rectifier unit and positive feedback driver element; the output of the described electric leakage sensing unit of input termination of described voltage multiplying rectifier unit; the input of the described positive feedback driver element of output termination of described voltage multiplying rectifier unit; the described switch element of output termination of described positive feedback driver element; described electric leakage sensing unit is used to respond to electric leakage signal and changes into voltage signal; this voltage signal is sent to described voltage multiplying rectifier unit; the direct voltage that obtains at least one times after voltage multiplying rectifier filtering inputs to described positive feedback driver element; and export the maximum current that excites to described switch element by described positive feedback driver element, realize cutting off the protected circuit power supply.
Described leakage switch, wherein, described voltage multiplying rectifier unit comprises capacitor C 2 and C3, and diode Q1's and Q2, described diode Q1 positive pole connects an end of described capacitor C 3, described diode Q1 negative pole connects described capacitor C 2 and diode Q2 positive pole respectively, inserts described positive feedback driver element after described diode Q2 negative pole links to each other with the other end of capacitor C 3.
Described leakage switch, wherein, described positive feedback driver element comprises triode T1, triode T2 and voltage-stabiliser tube D1, described voltage-stabiliser tube D1 negative pole connects the emitter of described capacitor C 3 and triode T1 respectively, described voltage-stabiliser tube D1 positive pole connects the base stage of described triode T1 collector electrode and triode T2 respectively, when described capacitor C 3 voltages surpass described voltage-stabiliser tube D1 voltage stabilizing value, leakage current appearred after described voltage-stabiliser tube D1 was reversed puncture, and, obtain that the emitter by described triode T2 exports described switch element to behind the maximum current with the feedback of this leakage current by two triodes.
The beneficial effects of the utility model are: owing to adopted above-mentioned technical solution, make the structure of this product simpler, cost is low, and the electromagnetic leakage switch that anti-Disturbance in Power Net is strong can prevent the electric shock accidents that causes because of electric leakage effectively.
Description of drawings
Fig. 1 is the utility model circuit diagram;
Embodiment
The utility model provides a kind of electromagnetic leakage switch, and is clearer, clear and definite for making the purpose of this utility model, technical scheme and advantage, below with reference to the accompanying drawing embodiment that develops simultaneously the utility model further described.
In conjunction with shown in Figure 1; the utility model comprises: electric leakage sensing unit 100; voltage multiplying rectifier unit 200; positive feedback driver element 300 and switch element 400; wherein; leakage inductance answers the output of sampling unit 100 to connect voltage multiplying rectifier unit 200; leakage inductance is answered the electric leakage inductor ZCT induction electric leakage signal of sampling unit 100 and this current signal is changed into voltage signal; this voltage signal is sent to voltage multiplying rectifier unit 200; by voltage multiplying rectifier unit 200 the electric leakage signal rectification that receives is obtained one and export to positive feedback driver element 300, and realize cutting off the protected circuit power supplies by switch element 400 than the twice direct voltage of original signal.
Electric leakage sensing unit 100 comprises: electric leakage inductor ZCT, sample resistance R5 and current-limiting resistance R1, voltage stabilizing didoe D3 and D4, and capacitor C 1, work as L, during the current imbalance that passes through on two lines of N, that is to say when there is electric leakage the power consumption equipment rear end, electric current by electric leakage inductor ZCT inside is just uneven, Δ In ≠ 0, electric leakage in this time inductor ZCT will sense electric leakage signal, the two termination leakage inductances of sample resistance R5 are answered two lines of device ZCT, just be used to obtain needed magnitude of voltage, sample resistance R5 respectively with reverse two voltage stabilizing didoe D3 that are connected and D4 and capacitor C 1 series connection, damage the element of back because interference is excessive in order to prevent, the effect of capacitor C 1 is in order to shield high-frequency interferencing signal, because the supply frequency that this product uses is in the 50Hz-60Hz scope, so the induced signal of electric leakage inductor ZCT also is in frequency range, if frequency surpasses this scope, just can think interference signal, the effect of resistance R 1 is exactly for current limliting, prevents to damage because electric current is big the components and parts of back; Because the voltage signal that electric leakage inductor ZCT is sensed can not drive dropout switch DCT electromagnet, so increased voltage multiplying rectifier unit 200 and positive feedback driver element 300 between electric leakage sensing unit 100 and switch element 400; Voltage multiplying rectifier unit 200 comprise two capacitor C 2 and C3 and two diodes Q1's and Q2, it utilizes the memory action of filter capacitor, can export the voltage of a multiple by a plurality of electric capacity and diode and give positive feedback driver element 300, in this voltage multiplying rectifier unit 200, the effect of capacitor C 3 is very crucial, rely on energy on the capacitor C 3 fully because drive the DCT electromagnet, stored energy directly has influence on and whether can be good at drive magnet DCT above it; The output voltage of voltage multiplying rectifier unit 200 is given positive feedback driver element 300; it comprises triode T1 and T2; a voltage-stabiliser tube D1; also comprise resistance R 3 and R4; capacitor C 4 and C5; its operation principle is: when the voltage on the capacitor C 3 high to the time above the voltage stabilizing value of voltage-stabiliser tube D1; voltage-stabiliser tube D1 was reversed and punctured back appearance electric leakage this moment; this electric leakage is by triode T1 and T2; utilize resistance R 3 and R4; capacitor C 4 and C5; and the positive feedback effect of triode T1 and T2, triode T2 can excite maximum electric current, and moment is transferred to switch element 400 with the energy on the capacitor C 3 by positive feedback driver element 300; DCT will drive tripping mechanism and trip by switch, plays the effect of protection power consumption equipment.
It should be noted that, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. electromagnetic leakage switch; comprise the electric leakage sensing unit; switch element; it is characterized in that: also comprise voltage multiplying rectifier unit and positive feedback driver element; the output of the described electric leakage sensing unit of input termination of described voltage multiplying rectifier unit; the input of the described positive feedback driver element of output termination of described voltage multiplying rectifier unit; the described switch element of output termination of described positive feedback driver element; described electric leakage sensing unit is used to respond to electric leakage signal and changes into voltage signal; this voltage signal is sent to described voltage multiplying rectifier unit; the direct voltage that obtains at least one times after voltage multiplying rectifier filtering inputs to described positive feedback driver element; and export the maximum current that excites to described switch element by described positive feedback driver element, realize cutting off the protected circuit power supply.
2. leakage switch according to claim 1, it is characterized in that, described voltage multiplying rectifier unit comprises capacitor C 2 and C3, and diode Q1's and Q2, described diode Q1 positive pole connects an end of described capacitor C 3, described diode Q1 negative pole connects described capacitor C 2 and diode Q2 positive pole respectively, inserts described positive feedback driver element after described diode Q2 negative pole links to each other with the other end of capacitor C 3.
3. leakage switch according to claim 1 and 2, it is characterized in that, described positive feedback driver element comprises triode T1, triode T2 and voltage-stabiliser tube D1, described voltage-stabiliser tube D1 negative pole connects the emitter of described capacitor C 3 and triode T1 respectively, described voltage-stabiliser tube D1 positive pole connects the base stage of described triode T1 collector electrode and triode T2 respectively, when described capacitor C 3 voltages surpass described voltage-stabiliser tube D1 voltage stabilizing value, leakage current appearred after described voltage-stabiliser tube D1 was reversed puncture, and, obtain that the emitter by described triode T2 exports described switch element to behind the maximum current with the feedback of this leakage current by two triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202824119U CN201584748U (en) | 2009-12-21 | 2009-12-21 | Electromagnetic leakage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202824119U CN201584748U (en) | 2009-12-21 | 2009-12-21 | Electromagnetic leakage switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201584748U true CN201584748U (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202824119U Expired - Fee Related CN201584748U (en) | 2009-12-21 | 2009-12-21 | Electromagnetic leakage switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201584748U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577975A (en) * | 2013-10-21 | 2015-04-29 | 无锡华阳科技有限公司 | Electromagnetic leakage switch with time delay function |
| CN106451347A (en) * | 2016-12-19 | 2017-02-22 | 无锡万吉科技股份有限公司 | Pure direct-current leakage protection switch |
-
2009
- 2009-12-21 CN CN2009202824119U patent/CN201584748U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104577975A (en) * | 2013-10-21 | 2015-04-29 | 无锡华阳科技有限公司 | Electromagnetic leakage switch with time delay function |
| CN106451347A (en) * | 2016-12-19 | 2017-02-22 | 无锡万吉科技股份有限公司 | Pure direct-current leakage protection switch |
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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: 20100915 Termination date: 20151221 |
|
| EXPY | Termination of patent right or utility model |