CN201910611U - Accidental power failure protection circuit - Google Patents
Accidental power failure protection circuit Download PDFInfo
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- CN201910611U CN201910611U CN2011200074863U CN201120007486U CN201910611U CN 201910611 U CN201910611 U CN 201910611U CN 2011200074863 U CN2011200074863 U CN 2011200074863U CN 201120007486 U CN201120007486 U CN 201120007486U CN 201910611 U CN201910611 U CN 201910611U
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Abstract
The utility model relates to an accidental power failure protection circuit, belonging to the technical field of electrical equipment. The accidental power failure protection circuit comprises a capacitance step-down circuit which is used for obtaining direct-current voltage from a grid, a signal detection circuit which is used for judging whether a switch in a protected circuit is conducted or not, a bidirectional thyristor trigger circuit which is used for triggering a bidirectional thyristor, and a signal processing circuit which is used for giving out the conducting signal of the bidirectional thyristor according to the judgment of the signal detection circuit. The accidental power failure protection circuit has the advantages that the structure is simple and ingenious, the protection circuit is convenient to use and can be embedded in the traditional switch socket, and effects of electricity saving and life and property safety protection can be realized in dormitories and rural areas in which accidental power failure frequently happens.
Description
Technical field
The utility model relates to a kind of accident power-off protective circuit, belongs to technical field of electrical equipment.
Background technology
Dormitory in College Dormitory and some enterprises, for safety and the consideration that is beneficial to rest, the outage of can operating a switch night, but caused the other problem also thus:
It at first is waste of energy, if forget the plug of turning off the light or not pulling up other electrical appliances on the socket night, next day, electrical appliance was directly devoted oneself to work when sending a telegram here, cause unnecessary waste, this conservation-minded society that vigorously advocates with us, the big policy of energy-saving and emission-reduction run in the opposite direction.
Another serious problem is that the general time of sending a telegram here next day can be disturbed personnel's normal rest like this than Zao between personnel WA, not enough hommization.
Also having one to be topic, also is sixty-four dollar question---potential safety hazard simultaneously.On November 14th, 2008,4 schoolgirls of Shanghai Business School during because of dormitory escape on fire unfortunate fall down from the building dead.And the arch-criminal of big fire does not pull up " immersion heater " when turning off the light the night before last, and the next morning, " immersion heater " was heated so that the combustible that ignited during 6 incoming calls.
Not only in the dormitory, in vast rural area, electric power system is not very stable, has identical problem when sending a telegram here once more behind the accident power-off yet.
Investigation finds to have at present " power-off protecting circuit " with solving this class problem, but these designs or be based on single-chip microcomputer, circuit complexity and cost are higher; Need to increase control button, use the bigger electromagnetic relay of power consumption, and need the existing circuit structure of modernization overlay.These all make them be difficult to be generalizable.
Summary of the invention
The purpose of this utility model is to propose a kind of accident power-off protective circuit, and feasible electric equipment because of meeting accident and opening circuit under the situation that power supply normally and no longer needs to use, can not restarted, and with electrical energy saving, avoids accident.
The accident power-off protective circuit that the utility model proposes comprises:
A capacity voltage dropping circuit is used for obtaining direct voltage from electrical network, and capacity voltage dropping circuit is made up of first electric capacity, first voltage-stabiliser tube, second voltage-stabiliser tube, first diode and second electric capacity; Described first electric capacity be parallel on the electrical network after the N utmost point of first voltage-stabiliser tube is connected; Connect with first diode after described second voltage-stabiliser tube and the second electric capacity parallel connection, circuit after the series connection is parallel on first voltage-stabiliser tube again, wherein the N utmost point of second voltage-stabiliser tube extremely links to each other with the N of first diode, the P utmost point of first diode extremely links to each other with the N of first voltage-stabiliser tube, and the P of the N utmost point of first voltage-stabiliser tube, an end of second electric capacity and second voltage-stabiliser tube extremely links to each other;
A signal deteching circuit is used for judging the whether conducting of switch of protected circuit, and signal deteching circuit is made up of first resistance, second resistance, the 3rd voltage-stabiliser tube, second diode, the 3rd electric capacity and bidirectional thyristor; Described first resistance is connected with the N utmost point of the 3rd voltage-stabiliser tube, connect with the N utmost point of second diode after the 3rd electric capacity and the second resistance parallel connection, circuit after the series connection is in parallel with the 3rd voltage-stabiliser tube again, wherein the P utmost point of second diode extremely links to each other with the N of the 3rd voltage-stabiliser tube, and the P utmost point of the 3rd voltage-stabiliser tube and the 3rd electric capacity, second resistance are connected to the T of bidirectional thyristor jointly
2The utmost point, the other end of first resistance is received the T of bidirectional thyristor
1The utmost point;
Bidirectional thyristor circuits for triggering are used to trigger above-mentioned bidirectional thyristor, and the bidirectional thyristor circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance and triode; The emitter of described triode and the two ends that are parallel to second voltage-stabiliser tube after the 5th resistance is connected again, wherein the collector electrode of triode extremely links to each other with the N of above-mentioned second voltage-stabiliser tube, the two ends of the 6th resistance link to each other with the emitter of triode and the G utmost point of bidirectional thyristor respectively, one end of the 3rd resistance links to each other with the base stage of triode, and the other end of the 3rd resistance links to each other with trigger chip in the signal processing circuit;
A signal processing circuit is used for providing according to the judged result of above-mentioned signal deteching circuit the Continuity signal of bidirectional thyristor, and signal processing circuit is made up of a trigger chip, the 4th resistance and the 4th electric capacity; Be connected in parallel on second electric capacity after described the 4th resistance and the 4th capacitances in series, described trigger chip links to each other with the tie point of the 4th electric capacity with the N utmost point and the 4th resistance of above-mentioned second diode simultaneously.
The accident power-off protective circuit that the utility model proposes, its advantage is:
1, the accident power-off protective circuit that the utility model proposes; simple in structure small and exquisite; can be embedded in the inner use of conventional switch socket; and do not need to change existing equipment; for often the meet accident situation of outage of dormitory and rural area, especially has the effect of saves energy, the protection security of the lives and property.
2, the accident power-off protective circuit that the utility model proposes does not need external connection battery, thus avoided the pollution of battery to environment, and removed the trouble of changing battery from.The power of control circuit consumption is extremely low in addition, and the theoretical calculation value is 0.1824W, only is equivalent to the power that a LED light consumes, so can increase use cost hardly by the electrical power of this circuit autophage.
3, accident power-off protective circuit of the present utility model is with low cost, helps promoting the use of in dormitory and rural area.Circuit structure is simple, and used device all is the electronic devices and components that generate in enormous quantities, owing to do not use single-chip microcomputer, with low cost, the cost of entire circuit can not surpass 3 yuan, can embed conventional switch socket inside, and circuit downstream is carried out power-off protection.
4, accident power-off protective circuit of the present utility model and conventional switch, socket etc. are integrated together, have just formed novel switch, socket, the user uses just conveniently like this, buys the back plug and play.
Description of drawings
Fig. 1 is the circuit diagram of the accident power-off protective circuit that the utility model proposes.
Embodiment
The accident power-off protective circuit that the utility model proposes, its circuit diagram comprises as shown in Figure 1:
A capacity voltage dropping circuit is used for obtaining direct voltage from electrical network, and capacity voltage dropping circuit is made up of first electric capacity, first voltage-stabiliser tube, second voltage-stabiliser tube, first diode and second electric capacity; Described first electric capacity be parallel on the electrical network after the N utmost point of first voltage-stabiliser tube is connected; Connect with first diode after described second voltage-stabiliser tube and the second electric capacity parallel connection, circuit after the series connection is parallel on first voltage-stabiliser tube again, wherein the N utmost point of second voltage-stabiliser tube extremely links to each other with the N of first diode, the P utmost point of first diode extremely links to each other with the N of first voltage-stabiliser tube, and the P of the N utmost point of first voltage-stabiliser tube, an end of second electric capacity and second voltage-stabiliser tube extremely links to each other;
A signal deteching circuit is used for judging the whether conducting of switch of protected circuit, and signal deteching circuit is made up of first resistance, second resistance, the 3rd voltage-stabiliser tube, second diode, the 3rd electric capacity and bidirectional thyristor; Described first resistance is connected with the N utmost point of the 3rd voltage-stabiliser tube, connect with the N utmost point of second diode after the 3rd electric capacity and the second resistance parallel connection, circuit after the series connection is in parallel with the 3rd voltage-stabiliser tube again, wherein the P utmost point of second diode extremely links to each other with the N of the 3rd voltage-stabiliser tube, and the P utmost point of the 3rd voltage-stabiliser tube and the 3rd electric capacity, second resistance are connected to the T of bidirectional thyristor jointly
2The utmost point, the other end of first resistance is received the T of bidirectional thyristor
1The utmost point;
Bidirectional thyristor circuits for triggering are used to trigger above-mentioned bidirectional thyristor, and the bidirectional thyristor circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance and triode; The emitter of described triode and the two ends that are parallel to second voltage-stabiliser tube after the 5th resistance is connected again, wherein the collector electrode of triode extremely links to each other with the N of above-mentioned second voltage-stabiliser tube, the two ends of the 6th resistance link to each other with the emitter of triode and the G utmost point of bidirectional thyristor respectively, one end of the 3rd resistance links to each other with the base stage of triode, and the other end of the 3rd resistance links to each other with trigger chip in the signal processing circuit;
A signal processing circuit is used for providing according to the judged result of above-mentioned signal deteching circuit the Continuity signal of bidirectional thyristor, and signal processing circuit is made up of a trigger chip, the 4th resistance and the 4th electric capacity; Be connected in parallel on second electric capacity after described the 4th resistance and the 4th capacitances in series, described trigger chip links to each other with the tie point of the 4th electric capacity with the N utmost point and the 4th resistance of above-mentioned second diode simultaneously.
Below in conjunction with accompanying drawing, introduce the operation principle and the course of work of the accident power-off protective circuit that the utility model proposes:
First capacitor C
1With the first voltage-stabiliser tube D
1, the second voltage-stabiliser tube D
2, the first diode D
4And second capacitor C
2Form a capacity voltage dropping circuit together, make the 220V alternating voltage process step-down of importing export the direct voltage about 5V.Circuit structure is: first capacitor C
1With the first voltage-stabiliser tube D
1N utmost point series connection; The second voltage-stabiliser tube D
2With second capacitor C
2After the parallel connection again with the first diode D
4N utmost point series connection; Again this part series circuit is parallel to D on first voltage-stabiliser tube
1, the first diode D wherein
4The P utmost point and the first voltage-stabiliser tube D
1N extremely continuous, the first voltage-stabiliser tube D
1The P utmost point and second capacitor C
2, the second voltage-stabiliser tube D
2P extremely altogether.
Positive half cycle of alternating current and voltage are during greater than 5.6V, and voltage drop is 5.6V on first voltage-stabiliser tube, and electric current first diode of flowing through is given the charging of second electric capacity simultaneously, and second voltage-stabiliser tube guarantees that voltage is no more than 5.1V on the electric capacity.Bear not conducting of reverse voltage in the time of the alternating current negative half period on first diode, second electric capacity discharges through second voltage-stabiliser tube, and voltage slightly descends.Because being the positive-negative half-cycle alternating voltage, alternating current occurs, so voltage maintains about 5V on second electric capacity, and can be to the trigger chip power supply and as bidirectional thyristor D
6Trigger voltage.
First resistance R
1, second resistance R
2, the 3rd voltage-stabiliser tube D
3, the second diode D
5, the 3rd capacitor C
3Form signal deteching circuit, be used for judging and bidirectional thyristor D
6Circuit in parallel is used to judge the whether conducting (electrical appliance on the respective socket is exactly whether to pull up plug) of switch of protected circuit, if switch conduction and bidirectional thyristor D
6Not conducting, then this partial circuit is exported 5V voltage, if switch disconnects or bidirectional thyristor D
6Conducting, this partial circuit output 0V voltage.Circuit structure is: first resistance R
1With the 3rd voltage-stabiliser tube D
3N utmost point series connection; The 3rd capacitor C
3With second resistance R
2After the parallel connection again with the second diode D
5N utmost point series connection; Again this part series circuit is parallel to the 3rd voltage-stabiliser tube D
3On, the second diode D wherein
5The P utmost point and the 3rd voltage-stabiliser tube D
3N extremely continuous, the 3rd voltage-stabiliser tube D
3The P utmost point and the 3rd capacitor C
3An end, second resistance R
2One terminate to bidirectional thyristor D
6T
2The utmost point; First resistance R
1The other end receive bidirectional thyristor D
6T
1The utmost point.The 3rd capacitor C
3On voltage as output signal voltage.
Trigger chip, the 4th resistance R
4With the 4th capacitor C
4Form bidirectional thyristor D
6Circuits for triggering.The 5V DC-voltage supply that trigger is obtained by capacity voltage dropping circuit, the 3rd capacitor C
3On voltage be its input signal, output signal is through the 3rd resistance R
3Be connected to triode Q
1Base stage control bidirectional thyristor D
6Circuits for triggering.Simultaneously in order to guarantee energy steady operation when circuit just powers on, here with the 4th resistance R
4With the 4th capacitor C
4Series circuit be connected in parallel on second capacitor C
2Last formation delay circuit is from the 4th capacitor C
4Last extraction voltage is received on the trigger as the zero setting signal.0V is kept in the output of trigger in a period of time when circuit just begins conducting like this, just forms output signal according to input signal subsequently.
Triode Q
1Emitter and the 5th resistance R
5Be parallel to the second voltage-stabiliser tube D after the series connection again
2Two ends, wherein triode Q
1The collector electrode and the second voltage-stabiliser tube D
2N extremely continuous.The 6th resistance R
6Connect triode Q
1Emitter and bidirectional thyristor D
6The G utmost point, trigger voltage is provided.
When trigger output 5V high level, triode Q
1Conducting, emitter output high level triggers bidirectional thyristor D then
6Conducting.
The course of work of integrated circuit is such:
The outage of operating a switch when switch is in closure state, electrical appliance quits work.When sending electricity when closing a floodgate once more, because initial very short a period of time internal trigger chip is by the zero setting of zero setting signal, be output as low level, thereby the bidirectional thyristor circuits for triggering can not be finished triggering, bidirectional thyristor also just is in off-state, electrical appliance is not worked, and signal deteching circuit will be exported high level like this;
When we need start electrical appliance once more, need earlier switch to be disconnected the electrical appliance work of closed once more back.This is because during our cut-off switch; signal deteching circuit will change low level into by high level; utilize this trailing edge that trigger is triggered; thereby output high level; make the work of bidirectional thyristor circuits for triggering; the bidirectional thyristor conducting, if this moment Closing Switch once more, protected circuit operate as normal.
After this as long as do not cut off the power supply, bidirectional thyristor will be in conducting state always, and circuit also just keeps operate as normal always, can be controlled the break-make of electrical appliance by switch fully.
Draw four connection jaws when this circuit uses as module, as shown in Figure 1, the P utmost point of first capacitor C, 1 top and the first voltage-stabiliser tube D1 is drawn two connection jaws and is connect alternating current; The T1 utmost point of first capacitor C, 1 top and bidirectional thyristor D6 is drawn two interfaces, as the interface of protected circuit.
Claims (1)
1. accident power-off protective circuit is characterized in that this power-off protecting circuit comprises:
A capacity voltage dropping circuit is used for obtaining direct voltage from electrical network, and capacity voltage dropping circuit is made up of first electric capacity, first voltage-stabiliser tube, second voltage-stabiliser tube, first diode and second electric capacity; Described first electric capacity be parallel on the electrical network after the N utmost point of first voltage-stabiliser tube is connected; Connect with first diode after described second voltage-stabiliser tube and the second electric capacity parallel connection, circuit after the series connection is parallel on first voltage-stabiliser tube again, wherein the N utmost point of second voltage-stabiliser tube extremely links to each other with the N of first diode, the P utmost point of first diode extremely links to each other with the N of first voltage-stabiliser tube, and the P of the P utmost point of first voltage-stabiliser tube, an end of second electric capacity and second voltage-stabiliser tube extremely links to each other;
A signal deteching circuit is used for judging the whether conducting of switch of protected circuit, and signal deteching circuit is made up of first resistance, second resistance, the 3rd voltage-stabiliser tube, second diode, the 3rd electric capacity and bidirectional thyristor; Described first resistance is connected with the N utmost point of the 3rd voltage-stabiliser tube, connect with the N utmost point of second diode after the 3rd electric capacity and the second resistance parallel connection, circuit after the series connection is in parallel with the 3rd voltage-stabiliser tube again, wherein the P utmost point of second diode extremely links to each other with the N of the 3rd voltage-stabiliser tube, the P utmost point of the 3rd voltage-stabiliser tube and the 3rd electric capacity, second resistance are connected to the T2 utmost point of bidirectional thyristor jointly, and the other end of first resistance is received the T1 utmost point of bidirectional thyristor;
Bidirectional thyristor circuits for triggering are used to trigger above-mentioned bidirectional thyristor, and the bidirectional thyristor circuits for triggering are made up of the 3rd resistance, the 5th resistance, the 6th resistance and triode; The emitter of described triode and the two ends that are parallel to second voltage-stabiliser tube after the 5th resistance is connected again, wherein the collector electrode of triode extremely links to each other with the N of above-mentioned second voltage-stabiliser tube, the two ends of the 6th resistance link to each other with the emitter of triode and the G utmost point of bidirectional thyristor respectively, one end of the 3rd resistance links to each other with the base stage of triode, and the other end of the 3rd resistance links to each other with trigger chip in the signal processing circuit;
A signal processing circuit is used for providing according to the judged result of above-mentioned signal deteching circuit the Continuity signal of bidirectional thyristor, and signal processing circuit is made up of a trigger chip, the 4th resistance and the 4th electric capacity; Be connected in parallel on second electric capacity after described the 4th resistance and the 4th capacitances in series, described trigger chip links to each other with the tie point of the 4th electric capacity with the N utmost point and the 4th resistance of above-mentioned second diode simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200074863U CN201910611U (en) | 2011-01-11 | 2011-01-11 | Accidental power failure protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200074863U CN201910611U (en) | 2011-01-11 | 2011-01-11 | Accidental power failure protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201910611U true CN201910611U (en) | 2011-07-27 |
Family
ID=44302810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200074863U Expired - Fee Related CN201910611U (en) | 2011-01-11 | 2011-01-11 | Accidental power failure protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201910611U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079387A1 (en) * | 2012-11-26 | 2014-05-30 | 浙江金美电动工具有限公司 | Power failure protection circuit, angle grinder having power failure protection, and circuit of the angle grinder |
| CN105226967A (en) * | 2015-09-24 | 2016-01-06 | 延边大学 | Alternating current 220V ultra-low power standby power supply |
-
2011
- 2011-01-11 CN CN2011200074863U patent/CN201910611U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014079387A1 (en) * | 2012-11-26 | 2014-05-30 | 浙江金美电动工具有限公司 | Power failure protection circuit, angle grinder having power failure protection, and circuit of the angle grinder |
| CN105226967A (en) * | 2015-09-24 | 2016-01-06 | 延边大学 | Alternating current 220V ultra-low power standby power supply |
| CN105226967B (en) * | 2015-09-24 | 2019-03-05 | 延边大学 | Alternating current 220V ultra-low power standby power supply |
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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: 20110727 Termination date: 20130111 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |