CN204992520U - Resume power supply protection device - Google Patents

Resume power supply protection device Download PDF

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Publication number
CN204992520U
CN204992520U CN201520651261.XU CN201520651261U CN204992520U CN 204992520 U CN204992520 U CN 204992520U CN 201520651261 U CN201520651261 U CN 201520651261U CN 204992520 U CN204992520 U CN 204992520U
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CN
China
Prior art keywords
circuit
voltage
triode
resistance
control circuit
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Expired - Fee Related
Application number
CN201520651261.XU
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Chinese (zh)
Inventor
陈金艳
李恒
张国银
谭洁
沐润志
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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Priority to CN201520651261.XU priority Critical patent/CN204992520U/en
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Publication of CN204992520U publication Critical patent/CN204992520U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a resume power supply protection device belongs to circuit protection technical field. The utility model discloses a circuit is controlled with assisting to master control circuit, master control circuit comprises power failure self preservation circuit and voltage comparison circuit, assists the accuse circuit and comprises vary voltage rectifier circuit and control circuit, wherein, power failure self preservation circuit is connected with vary voltage rectifier circuit, and the transformer T that grid voltage passes through among the vary voltage rectifier circuit steps down and the power supply of rectifier bridge heap UR rectification succeeding crop for control circuit and voltage comparison circuit. The utility model discloses enable supply circuit and because of the back that has a power failure, can not resume the power supply by oneself, could be again after must the manual startup power in addition, still play excessive pressure and undervoltage protection simultaneously, consequently can prevent to send a telegram here suddenly again after having a power failure suddenly, be out or the user that sleep causes the power waste for owner, machine loss, or even take place conflagration, the loss that brings economy and lives and properties for the electricity consumer, simple structure, it is with low costs, the dependable performance, the facilitate promotion is used.

Description

One restores electricity protective device
Technical field
The utility model relates to one and to restore electricity protective device, belongs to circuit protection technical field.
Background technology
Along with the raising of quality of life, the use of household electrical appliance is more and more universal, and mains supply can often because some reasons have a power failure suddenly, the electrical appliance now worked in many families quits work because of dead electricity, because carelessness fails to close electrical appliance mains switch.Once power system restoration is powered, household electrical appliance will again electric work, because the long-time power consumption of electrical equipment can shorten the life-span of electrical equipment, waste electric energy in addition, serious also can cause fire, brings economic loss and casualties to family.Secondly, sometimes after grid maintenance or failture evacuation, voltage magnitude is not detected just to customer power supply, now power consumption equipment can because overvoltage or under-voltagely to cause damage, the lighter makes part power consumption equipment damage, and severe one can cause large-area circuit to damage, and brings serious economic loss.
Summary of the invention
The utility model provides one and to restore electricity protective device, utilizes electronic circuit to solve overvoltage, under-voltage protection and the protection problem that restores electricity.
The technical solution of the utility model is: one restores electricity protective device, comprises governor circuit and auxiliary control circuit, and described governor circuit is made up of have a power failure holding circuit 1 and voltage comparator circuit 3, and auxiliary control circuit is made up of Transformer Rectifier circuit 2 and control circuit 4; Wherein, power failure holding circuit 1 is connected with Transformer Rectifier circuit 2, and line voltage is by the power supply as control circuit 4 and voltage comparator circuit 3 after the transformer T step-down in Transformer Rectifier circuit 2 and rectifier bridge stack UR rectification.
Described power failure holding circuit 1 comprises switch S, fuse B, indicator light L, resistance R9, often opens button SB1, normally closed button SB2, exchanges relay coil KM, normally opened contact KM1, normally opened contact KM2, normally opened contact K, load RL; Transformer Rectifier circuit 2 comprises transformer T, rectifier bridge stack UR; Voltage comparator circuit 3 comprises electric capacity C, resistance R1 ~ R5, integrated transporting discharging A1, A2; Control circuit 4 comprises relay coil K, resistance R6 ~ R8, triode VT1, VT2, voltage-stabiliser tube VS, diode VD1, VD2;
Described indicator light L and resistance R9 is connected in parallel between the live wire of house lead in and zero line after connecting, switch S is connected with the live wire of house lead in, fuse B is after indicator light L and house lead in live wire interface point, one end of electric capacity C other end that is connected with the output N point of rectifier bridge UR is connected with earth connection, transformer T is connected with rectifier bridge stack UR, the emitter of triode VT2 is connected with relay coil K, the negative electrode of voltage-stabiliser tube VS is connected with triode VT1 base stage, normally opened contact KM1 is in parallel with often opening button SB1, and connect with normally closed button SB2 and AC relay coil KM, normally opened contact KM2 connects with normally opened contact K and load RL, integrated transporting discharging A1, the output of A2 respectively with diode VD1, the negative electrode of VD2 is connected, the input in the same way of integrated transporting discharging A1 is connected between resistance R3 and R4, reverse input end is connected with the input in the same way of integrated transporting discharging A2, the input in the same way of integrated transporting discharging A2 is connected between resistance R1 and resistance R2, the reverse input end of integrated transporting discharging A2 is connected between resistance R4 and R5, one end of resistance R6 other end that is connected with the base stage of triode VT1 is connected with the collector electrode of triode VT1, R7 one end other end that is connected with the collector electrode of triode VT2 is connected with the base stage of triode VT2, R8 one end is connected with the base stage of triode VT2 the other end and diode VD1, the anode tap M point of VD2 is connected.
Operation principle of the present utility model is:
When electrical network is stopped power supply, relay coil K dead electricity in control circuit 4, normally opened contact K in power failure holding circuit 1 disconnects, AC relay coil KM dead electricity, normally opened contact KM1, normally opened contact KM2 disconnect, load RL two ends do not have voltage, when power system restoration is powered, because normally opened contact KM1, normally opened contact KM2 disconnect, load RL two ends still do not have voltage, when needs are powered, press and often open button SB1, line voltage is by the power supply as control circuit 4 and voltage comparator circuit 3 after transformer T step-down and rectifier bridge stack UR rectification.
When magnitude of voltage is in normal range (NR), the output of integrated transporting discharging A1, A2 is high level, diode VD1, VD2 all not conductings, now triode VT1 and triode VT2 is conducting state, relay coil K in control circuit 4 obtains electric, and AC relay coil KM obtains electric, and normally opened contact KM1, normally opened contact KM2 are closed, normally opened contact K in power failure holding circuit 1 closes, and there is voltage at load RL two ends.
If when line voltage value is greater than or equal to a certain magnitude of voltage, the voltage of N point is high level, U1 raises with N point voltage and raises, and the voltage U 2 that the integrated stable voltage circuit in control circuit 4 is exported by voltage-stabiliser tube VS does not change, and its branch pressure voltage U3 and U4 remains unchanged.As U1>U3, the voltage upset of integrated transporting discharging A1 output is low level, VD1 conducting, triode VT2 ends, the relay coil K dead electricity in control circuit 4, and the normally opened contact K in power failure holding circuit 1 disconnects, power supply circuits are stopped power supply, and load RL two ends do not have voltage.
If when mains supply magnitude of voltage is less than or equal to a certain amplitude, U1 declines with N point voltage and declines, as U1<U4, the upset of integrated transporting discharging A2 output end voltage is low level, but the voltage of N point is still high level compared with the voltage of the output of integrated transporting discharging A2, diode VD2 conducting, triode VT2 is ended, the relay coil K dead electricity in control circuit 4, the normally opened contact K in power failure holding circuit 1 disconnects, power supply circuits are stopped power supply, and load RL two ends do not have voltage.
Use step of the present utility model is:
The first step: this device access user enters electric mouth.
Second step: when power system restoration supply line is normal, line voltage is after transformer T and rectifier bridge stack UR, the reverse input end of integrated transporting discharging A1 and the input in the same way of integrated transporting discharging A2 are to voltage U 1, and integrated stable voltage circuit also obtains a voltage U 2, the input terminal voltage in the same way of integrated transporting discharging A1 is the reverse input end voltage of U3 and integrated transporting discharging A2 is that U4 is certain value.Work as U3>U4, and during U4<U1, the output end voltage of integrated transporting discharging A1, A2 is the high level higher than M point current potential, now diode VD1 and diode VD2 all not conductings.Meanwhile, due to triode VT2 conducting, relay coil K obtains electric, and normally opened contact K closes, and presses and often opens button SB1, AC relay coil KM obtains electric, and normally opened contact KM1, normally opened contact KM2 are closed.
3rd step: power supply circuits normal power supply.
4th step: after power system restoration is powered, mains supply occurs extremely to be equal to or less than a certain magnitude of voltage, U1 declines with N point voltage and declines, as U1<U4, the output end voltage upset of integrated transporting discharging A2 is low level, and diode VD2 conducting, makes triode VT2 end, relay coil K dead electricity, normally opened contact K disconnects.
5th step: power supply circuits are stopped power supply.
6th step: after mains supply recovers, mains supply occurs extremely to be equal to or greater than a certain magnitude of voltage, and U1 raises with N point voltage and raises, and the voltage U 2 that integrated stable voltage circuit exports still does not change, and its branch pressure voltage U3 and U4 remains unchanged.As U1>U3, the output end voltage upset of integrated transporting discharging A1 is low level, and VD1 conducting, triode VT2 ends, relay coil K dead electricity, and normally opened contact K disconnects.
7th step: power supply circuits are stopped power supply.
8th step: when the line voltage of powering is suddenly higher or lower than a certain magnitude of voltage, VD1 or VD2 always has one because of mains supply overvoltage or under-voltage and conducting, thus VT2 cut-off.
9th step: power supply circuits are stopped power supply.
The beneficial effects of the utility model are: power supply circuits can be made because of after power failure; can not restore electricity voluntarily; again power source could be added after must manually starting; also play overvoltage and under-voltage protection simultaneously; therefore can prevent from sending a telegram here suddenly again after having a power failure suddenly, to owner not or the user of sleep cause power supply to waste, machine loss; even breaking out of fire, brings the loss of economy and lives and properties to electricity consumer.The utility model structure is simple, and cost is low, dependable performance, easy to utilize.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model;
Each label in figure: 1-power failure holding circuit, 2-Transformer Rectifier circuit, 3-voltage comparator circuit, 4-control circuit.
Embodiment
Embodiment 1: as shown in Figure 1, one restores electricity protective device, comprises governor circuit and auxiliary control circuit, and described governor circuit is made up of have a power failure holding circuit 1 and voltage comparator circuit 3, and auxiliary control circuit is made up of Transformer Rectifier circuit 2 and control circuit 4; Wherein, power failure holding circuit 1 is connected with Transformer Rectifier circuit 2, and line voltage is by the power supply as control circuit 4 and voltage comparator circuit 3 after the transformer T step-down in Transformer Rectifier circuit 2 and rectifier bridge stack UR rectification.
Described power failure holding circuit 1 comprises switch S, fuse B, indicator light L, resistance R9, often opens button SB1, normally closed button SB2, exchanges relay coil KM, normally opened contact KM1, normally opened contact KM2, normally opened contact K, load RL; Transformer Rectifier circuit 2 comprises transformer T, rectifier bridge stack UR; Voltage comparator circuit 3 comprises electric capacity C, resistance R1 ~ R5, integrated transporting discharging A1, A2; Control circuit 4 comprises relay coil K, resistance R6 ~ R8, triode VT1, VT2, voltage-stabiliser tube VS, diode VD1, VD2;
Described indicator light L and resistance R9 is connected in parallel between the live wire of house lead in and zero line after connecting, switch S is connected with the live wire of house lead in, fuse B is after indicator light L and house lead in live wire interface point, one end of electric capacity C other end that is connected with the output N point of rectifier bridge UR is connected with earth connection, transformer T is connected with rectifier bridge stack UR, the emitter of triode VT2 is connected with relay coil K, the negative electrode of voltage-stabiliser tube VS is connected with triode VT1 base stage, normally opened contact KM1 is in parallel with often opening button SB1, and connect with normally closed button SB2 and AC relay coil KM, normally opened contact KM2 connects with normally opened contact K and load RL, integrated transporting discharging A1, the output of A2 respectively with diode VD1, the negative electrode of VD2 is connected, the input in the same way of integrated transporting discharging A1 is connected between resistance R3 and R4, reverse input end is connected with the input in the same way of integrated transporting discharging A2, the input in the same way of integrated transporting discharging A2 is connected between resistance R1 and resistance R2, the reverse input end of integrated transporting discharging A2 is connected between resistance R4 and R5, one end of resistance R6 other end that is connected with the base stage of triode VT1 is connected with the collector electrode of triode VT1, R7 one end other end that is connected with the collector electrode of triode VT2 is connected with the base stage of triode VT2, R8 one end is connected with the base stage of triode VT2 the other end and diode VD1, the anode tap M point of VD2 is connected.
Embodiment 2: as shown in Figure 1, one restores electricity protective device, comprises governor circuit and auxiliary control circuit, and described governor circuit is made up of have a power failure holding circuit 1 and voltage comparator circuit 3, and auxiliary control circuit is made up of Transformer Rectifier circuit 2 and control circuit 4; Wherein, power failure holding circuit 1 is connected with Transformer Rectifier circuit 2, and line voltage is by the power supply as control circuit 4 and voltage comparator circuit 3 after the transformer T step-down in Transformer Rectifier circuit 2 and rectifier bridge stack UR rectification.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail above, but the utility model is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from the utility model aim.

Claims (2)

1. the protective device that restores electricity, it is characterized in that: comprise governor circuit and auxiliary control circuit, described governor circuit is made up of the holding circuit that has a power failure (1) and voltage comparator circuit (3), and auxiliary control circuit is made up of Transformer Rectifier circuit (2) and control circuit (4); Wherein, power failure holding circuit (1) is connected with Transformer Rectifier circuit (2), and line voltage is by the power supply as control circuit (4) and voltage comparator circuit (3) after the transformer T step-down in Transformer Rectifier circuit (2) and rectifier bridge stack UR rectification.
2. the protective device that restores electricity according to claim 1, it is characterized in that: described power failure holding circuit (1) comprises switch S, fuse B, indicator light L, resistance R9, often open button SB1, normally closed button SB2, exchange relay coil KM, normally opened contact KM1, normally opened contact KM2, normally opened contact K, load RL; Transformer Rectifier circuit (2) comprises transformer T, rectifier bridge stack UR; Voltage comparator circuit (3) comprises electric capacity C, resistance R1 ~ R5, integrated transporting discharging A1, A2; Control circuit (4) comprises relay coil K, resistance R6 ~ R8, triode VT1, VT2, voltage-stabiliser tube VS, diode VD1, VD2;
Described indicator light L and resistance R9 is connected in parallel between the live wire of house lead in and zero line after connecting, switch S is connected with the live wire of house lead in, fuse B is after indicator light L and house lead in live wire interface point, one end of electric capacity C other end that is connected with the output N point of rectifier bridge UR is connected with earth connection, transformer T is connected with rectifier bridge stack UR, the emitter of triode VT2 is connected with relay coil K, the negative electrode of voltage-stabiliser tube VS is connected with triode VT1 base stage, normally opened contact KM1 is in parallel with often opening button SB1, and connect with normally closed button SB2 and AC relay coil KM, normally opened contact KM2 connects with normally opened contact K and load RL, integrated transporting discharging A1, the output of A2 respectively with diode VD1, the negative electrode of VD2 is connected, the input in the same way of integrated transporting discharging A1 is connected between resistance R3 and R4, reverse input end is connected with the input in the same way of integrated transporting discharging A2, the input in the same way of integrated transporting discharging A2 is connected between resistance R1 and resistance R2, the reverse input end of integrated transporting discharging A2 is connected between resistance R4 and R5, one end of resistance R6 other end that is connected with the base stage of triode VT1 is connected with the collector electrode of triode VT1, R7 one end other end that is connected with the collector electrode of triode VT2 is connected with the base stage of triode VT2, R8 one end is connected with the base stage of triode VT2 the other end and diode VD1, the anode tap M point of VD2 is connected.
CN201520651261.XU 2015-08-27 2015-08-27 Resume power supply protection device Expired - Fee Related CN204992520U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520651261.XU CN204992520U (en) 2015-08-27 2015-08-27 Resume power supply protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520651261.XU CN204992520U (en) 2015-08-27 2015-08-27 Resume power supply protection device

Publications (1)

Publication Number Publication Date
CN204992520U true CN204992520U (en) 2016-01-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520651261.XU Expired - Fee Related CN204992520U (en) 2015-08-27 2015-08-27 Resume power supply protection device

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107294057A (en) * 2017-08-16 2017-10-24 苏州易美新思新能源科技有限公司 Protection device and method, electric power system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107294057A (en) * 2017-08-16 2017-10-24 苏州易美新思新能源科技有限公司 Protection device and method, electric power system

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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: 20160120

Termination date: 20170827