CN110289660A - Electric control circuit under a kind of communication power supply - Google Patents

Electric control circuit under a kind of communication power supply Download PDF

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Publication number
CN110289660A
CN110289660A CN201910663804.2A CN201910663804A CN110289660A CN 110289660 A CN110289660 A CN 110289660A CN 201910663804 A CN201910663804 A CN 201910663804A CN 110289660 A CN110289660 A CN 110289660A
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China
Prior art keywords
electrically connected
diode
contactor
power supply
resistance
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Granted
Application number
CN201910663804.2A
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Chinese (zh)
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CN110289660B (en
Inventor
刘新华
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Wuhan Intercontinental Telecom Technology Co Ltd
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Wuhan Intercontinental Telecom Technology Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/10Control circuit supply, e.g. means for supplying power to the control circuit

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present invention relates to electric control circuits under a kind of communication power supply, including contactor function conversion circuit, lower electric contactor power supply circuit, lower electric control circuit and lower electric contactor KM, electric control signal is descended to access lower electric contactor power supply circuit all the way, electric control signal accesses contactor function conversion circuit under another way, lower electric contactor power supply circuit and lower electric control circuit are electrically connected with lower electric control circuit respectively, and lower electric control circuit is electrically connected with lower electric contactor KM.The present invention descends electric control signal to be input to lower electrical apparatus control circuit all the way by what peripheral control unit exported, and contactor function conversion circuit is cooperated to control lower electric contactor movement, battery and external loading to be disconnected, realize electric control under battery, lower electric contactor power supply circuit is input to by electric control signal under another way, can be in the normally closed working condition of lower electric contactor and movement to the power supply afterflow of lower electric contactor, and ensure that lower electricity is safe and reliable.

Description

Electric control circuit under a kind of communication power supply
Technical field
The present invention relates to electric control circuits under electronic circuit technology field more particularly to a kind of communication power supply.
Background technique
The work of communication battery protection is very important part in the power supply system for communications, is related to the normal use of whole system Service life, the battery feature inconvenient due to price, replacement, so communications service provider proposes very high want to battery protection now It asks.In mains failure, at this moment battery is usually artificially cut until dead battery capability to load discharge in the prior art It is automatically powered off when except battery or battery capacity deficit, battery discharge time is too long to will lead to battery power shortage, has to battery life Very big influence.Therefore it needs to disconnect on battery when the electricity of battery declines to a certain extent, to protect battery.
Summary of the invention
The technical problem to be solved by the present invention is to solve the above shortcomings of the prior art and to provide electric under a kind of communication power supply Control circuit.
The technical scheme to solve the above technical problems is that electric control circuit under a kind of communication power supply, including connect Tentaculum function conversion circuit, lower electric contactor power supply circuit, lower electric control circuit and lower electric contactor KM descend electric control to believe all the way Number access contactor function conversion circuit, electric control signal accesses the lower electric contactor power supply circuit, institute under another way It states lower electric contactor power supply circuit and lower electric control circuit is electrically connected with the lower electric control circuit respectively, the lower electric control electricity Road is electrically connected with the lower electric contactor KM, and the lower electric contactor KM is connected electrically between battery and external loading.
The beneficial effects of the present invention are: electric control circuit under communication power supply of the invention, is exported by peripheral control unit It descends electric control signal to be input to the lower electrical apparatus control circuit all the way, and cooperates the lower electricity of the contactor function conversion circuit control Contactor movement, battery and external loading are disconnected, and are realized electric control under battery, are inputted by electric control signal under another way It, can be in the normally closed working condition of lower electric contactor and movement to the lower electric contactor to the lower electric contactor power supply circuit Power supply afterflow, circuit control is simple, and lower electric control can be realized by the lower electric control signal that adjusting controller exports.
Based on the above technical solution, the present invention can also be improved as follows:
Further, the lower electric control circuit includes resistance R5, resistance R 6, resistance R 7, resistance R8, resistance R9, capacitor C3, diode D3, diode D4, diode D5, metal-oxide-semiconductor Q3, triode Q4 and relay RLY1 descend electric control signal logical all the way Cross the base stage that the resistance R8 accesses the triode Q4, the collector of the triode Q4 and contactor function conversion electricity First output end on road is electrically connected, the emitter ground connection of the triode Q4, and the emitter of the triode Q4 and base stage it Between be electrically connected with the resistance R9, it is in sequential series between the grid and external power supply of the metal-oxide-semiconductor Q3 to have the resistance R7 and electricity R5 is hindered, and is parallel with the resistance R6 and capacitor C3, the metal-oxide-semiconductor Q3 between the resistance R7 and the common end and ground of resistance R5 Source electrode ground connection, the drain electrode of the metal-oxide-semiconductor Q3 is electrically connected with the third input terminal of the contactor function conversion circuit, described two Pole pipe D3 anode be electrically connected with the second output terminal of the contactor function conversion circuit, the cathode of the diode D3 with outside Portion's power electric connection, the coil of the relay RLY1 is in parallel with the diode D3, the common of the relay RLY1 It being electrically connected with the anode of the diode D4, the cathode of the diode D4 is electrically connected with coil one end of lower electric contactor KM, The coil other end of the lower electric contactor KM is electrically connected with the anode of the diode D4, the normally opened touching of the relay RLY1 Point is unloaded, and the normally-closed contact of the relay RLY1 is electrically connected with the third output end of the contactor function conversion circuit, institute The anode for stating diode D5 is electrically connected with the 4th input terminal of the contactor function conversion circuit, the cathode of the diode D5 It is electrically connected with the cathode of battery.
The beneficial effect of above-mentioned further scheme is: descending electric control signal to control institute all the way by what peripheral control unit issued Triode Q4, metal-oxide-semiconductor Q3 on or off are stated, and the contactor function conversion circuit is cooperated to can control the relay RLY1 is attracted or disconnects, to realize the lower electric contactor KM movement of control, completes lower Electricity Functional, described diode D3, D4 can To absorb relay RLY1 and lower electric contactor KM inverse electromotive force.
Further, the contactor function conversion circuit includes connecting insert JMP1, connect to insert JMP2 and connect and insert JMP3, institute No. 1 pin for stating the slotting JMP1 of connection is electrically connected as first input end with the anode of diode D3, No. 2 for connecting slotting JMP1 Pin is electrically connected as the first output end with the collector of the triode Q4, and No. 3 pins for inserting JMP1 that connect are as the Two input terminals are grounded by the capacitor C3, and No. 1 pin for inserting JMP3 that connects is as third input terminal and the metal-oxide-semiconductor Q3 Drain electrode electrical connection, described connect insert No. 2 pins of JMP3 and be electrically connected as the positive of second output terminal and the diode D3, No. 1 pin for connecting slotting JMP2 is electrically connected as the 4th input terminal with the anode of the diode D5, and the connection is inserted No. 2 pins of JMP2 are electrically connected as third output end with the normally-closed contact of the relay RLY1, and described connect inserts the 3 of JMP2 Number pin is electrically connected as the 5th output end with the lower electric contactor power supply circuit.
The beneficial effect of above-mentioned further scheme is: inserting JMP1 by adjusting the connection, JMP2 is inserted in connection and connection is slotting The jumper of JMP3 under different working condition so that drive the lower electric contactor movement, thus by external cell and outside Load disconnects, and realizes electric control under battery.
Further, the lower electric contactor power supply circuit include resistance R1, resistance R2, resistance R3, resistance R4, capacitor C1, Capacitor C2, diode D1, diode D2, diode ZD1, triode Q1, thyristor Q2 and optocoupler U1, electric control is believed under another way The base stage of the triode Q1, the grounded collector of the triode Q1, the triode Q1 number are accessed by the resistance R2 Emitter be electrically connected with the cathode of the optocoupler U1, the anode of the optocoupler U1 is electrically connected by the resistance R1 with external power supply It connects, the emitter of the optocoupler U1 is electrically connected with the gate pole of the thyristor Q2, the emitter of the optocoupler U1 and the brilliant lock The anode and the contactor function that the resistance R3 and capacitor C1, the thyristor Q2 are parallel between the cathode of pipe Q2 are converted 5th output end of circuit is electrically connected, and is electrically connected with the electricity between the collector of the optocoupler U1 and the thyristor Q2 cathode Hold C2, the collector of the optocoupler U1 is electrically connected with the cathode of the diode ZD1, the diode ZD1 it is positive with it is described The electrical connection of thyristor Q2 cathode, the cathode of the thyristor Q2 is respectively with the positive and described diode D2's of the diode D1 Anode electrical connection, the cathode of the cathode of the diode D1 and the diode D2 negative electricity with external power supply and battery respectively Connection, is electrically connected with the resistance R4 between the collector of the optocoupler U1 and the anode of the thyristor Q2.
The beneficial effect of above-mentioned further scheme is: due to the lower electric contactor normally closed working condition and act when line Circle immediate current is very big, and electric control signal controls crystalline substance lock by photoelectrical coupler U1 isolation under the another way of peripheral control unit output Pipe Q2 work, by diode D1, D2 to lower electric contactor KM power supply afterflow.
Detailed description of the invention
Fig. 1 is electric control circuit structural block diagram under communication power supply of the invention;
Fig. 2 is the circuit diagram of electric control circuit under communication power supply of the invention.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and It is non-to be used to limit the scope of the invention.
As shown in Figure 1, electric control circuit under a kind of communication power supply, including contactor function conversion circuit, lower electric contactor Power supply circuit, lower electric control circuit and lower electric contactor KM, lower electric control signal 1 access the contactor function conversion circuit, Lower electric control signal 2 accesses the lower electric contactor power supply circuit, the lower electric contactor power supply circuit and lower electric control circuit It is electrically connected respectively with the lower electric control circuit, the lower electric control circuit is electrically connected with the lower electric contactor KM, under described Electric contactor KM is connected electrically between battery and external loading.
Electric control circuit under communication power supply of the invention is input to by the lower electric control signal 1 that peripheral control unit exports The lower electrical apparatus control circuit, and the contactor function conversion circuit is cooperated to control lower electric contactor movement, by external electrical Source and external loading disconnect, and realize electric control under power supply, input the lower electric contactor power supply electricity by lower electric control signal 2 Road, can be in the normally closed working condition of lower electric contactor and movement to the lower electric contactor power supply afterflow, and circuit control is simple, And lower electric control can be realized by the lower electric control signal that adjusting controller exports, guarantee that lower electricity is safe and reliable.
As shown in Fig. 2, the physical circuit figure of electric control circuit under communication power supply of the invention is described in detail below.
In one or more embodiments of the present invention, the lower electric control circuit includes resistance R5, resistance R 6, resistance R 7, resistance R8, resistance R9, capacitor C3, diode D3, diode D4, diode D5, metal-oxide-semiconductor Q3, triode Q4 and relay RLY1, lower electric control signal 1 access the base stage of the triode Q4 by the resistance R8, the collector of the triode Q4 with First output end of the contactor function conversion circuit is electrically connected, the emitter ground connection of the triode Q4, and three pole The resistance R9 is electrically connected between the emitter and base stage of pipe Q4, between the grid and external power supply of the metal-oxide-semiconductor Q3 sequentially It is in series with the resistance R7 and resistance R5, and is parallel with the resistance R6 between the resistance R7 and the common end and ground of resistance R5 With capacitor C3, the source electrode of the metal-oxide-semiconductor Q3 is grounded, and the of the drain electrode of the metal-oxide-semiconductor Q3 and the contactor function conversion circuit The anode of the electrical connection of three input terminals, the diode D3 is electrically connected with the second output terminal of the contactor function conversion circuit, The cathode of the diode D3 is electrically connected with external power supply, and the coil of the relay RLY1 is in parallel with the diode D3, institute The common for stating relay RLY1 is electrically connected with the anode of the diode D4, the cathode of the diode D4 and lower electrical contact Coil one end of device KM is electrically connected, and the coil other end of the lower electric contactor KM is electrically connected with the anode of the diode D4, The normally opened contact of the relay RLY1 is unloaded, the normally-closed contact of the relay RLY1 and the contactor function conversion circuit The electrical connection of third output end, the anode and the 4th input terminal of the contactor function conversion circuit of the diode D5 be electrically connected It connects, the cathode of the diode D5 is electrically connected with the cathode of battery.
The triode Q4, metal-oxide-semiconductor Q3 on or off are controlled by the lower electric control signal 1 that peripheral control unit issues, And cooperate the contactor function conversion circuit to can control the relay RLY1 and be attracted or disconnect, to realize under control Lower Electricity Functional is completed in electric contactor KM movement, and relay RLY1 can be absorbed in described diode D3, D4 and lower electric contactor KM is anti- To electromotive force.
In one or more embodiments of the present invention, the contactor function conversion circuit includes connecting insert JMP1, connect It patches JMP2 and connects and insert JMP3, the anode electricity for connecting No. 1 pin for inserting JMP1 as first input end and diode D3 Connection, No. 2 pins for connecting slotting JMP1 are electrically connected as the first output end with the collector of the triode Q4, the company No. 3 pins for patching JMP1 are grounded as the second input terminal by the capacitor C3, described to connect No. 1 pin conduct for inserting JMP3 Third input terminal is electrically connected with the drain electrode of the metal-oxide-semiconductor Q3, and No. 2 pins for inserting JMP3 that connect are as second output terminal and institute The anode electrical connection of diode D3 is stated, it is described to connect No. 1 pin for inserting JMP2 as the 4th input terminal with the diode D5's Anode electrical connection, No. 2 pins for inserting JMP2 that connect are as the normally-closed contact of third output end and the relay RLY1 electricity Connection, No. 3 pins for connecting slotting JMP2 are electrically connected as the 5th output end with the lower electric contactor power supply circuit.
JMP1 is inserted, slotting JMP2 is connected and connects the jumper for inserting JMP3 in different operating by adjusting described connect The lower electric contactor movement is driven to realize electric control under power supply so that external power supply and external loading be disconnected under state.
In the present invention, the lower electric contactor is divided into normally closed contact and two kinds of working methods of normal opened contact, is connect by changing It connected in tentaculum function conversion circuit and inserts JMP1, connected and insert JMP2, connect and insert JMP3 wire jumper and realize, specific as follows:
Normally closed contact mode: JMP3 is shorted 1, No. 2 pin, and JMP1 is shorted 2, No. 3 pins, and JMP2 is shorted 2, No. 3 pins, when Exchange has a power failure, battery deep discharge, when capacity drops to lower electric threshold values, when the lower electric control signal DO0 of CPU output is high level, and three Pole pipe Q4 conducting, metal-oxide-semiconductor Q3 shutdown, relay RLY1 is not attracted, lower electric contactor KM energization movement, lower electricity by external cell with External loading disconnects;When exchange is sent a telegram here, and external power supply work output is normal, it is low level that CPU, which issues lower electric control signal DO0, When, triode Q4 cut-off, metal-oxide-semiconductor Q3 is connected, and relay RLY1 is attracted, and lower electric contactor KM open circuit is failure to actuate, and external loading connects Enter to external power supply;
Normal opened contact mode: 1, No. 2 pin of JMP3 is not shorted, and JMP1 connects 1, No. 2 pin, and JMP2 connects 1, No. 2 pin, when Exchange has a power failure, battery deep discharge, when capacity drops to lower electric threshold values, when electric control signal DO0 is high level under CPU is issued, and three poles Pipe Q4 conducting, metal-oxide-semiconductor Q3 are shielded, and relay RLY1 is attracted, and lower electric contactor KM open circuit is failure to actuate, and external power supply and load are protected Hold disconnection;When exchange is sent a telegram here, and external power supply work output is normal, when the lower electric control signal DO0 of CPU sending is low level, three Pole pipe Q4 cut-off, metal-oxide-semiconductor Q3 are shielded, and relay RLY1 is not attracted, and lower electric contactor KM energization movement, external loading is linked into External power supply.
In one or more embodiments of the present invention, the lower electric contactor power supply circuit include resistance R1, resistance R2, Resistance R3, resistance R4, capacitor C1, capacitor C2, diode D1, diode D2, diode ZD1, triode Q1, thyristor Q2 and light Coupling U1, lower electric control signal 2 access the base stage of the triode Q1 by the resistance R2, and the collector of the triode Q1 connects Ground, the emitter of the triode Q1 are electrically connected with the cathode of the optocoupler U1, and the anode of the optocoupler U1 passes through the resistance R1 is electrically connected with external power supply, and the emitter of the optocoupler U1 is electrically connected with the gate pole of the thyristor Q2, the optocoupler U1's The resistance R3 and capacitor C1, the anode of the thyristor Q2 and institute are parallel between emitter and the cathode of the thyristor Q2 State the 5th output end electrical connection of contactor function conversion circuit, the collector of the optocoupler U1 and the thyristor Q2 cathode it Between be electrically connected with the capacitor C2, the collector of the optocoupler U1 is electrically connected with the cathode of the diode ZD1, the diode The anode of ZD1 is electrically connected with the thyristor Q2 cathode, the cathode of the thyristor Q2 anode with the diode D1 respectively With the anode electrical connection of the diode D2, the cathode of the cathode of the diode D1 and the diode D2 respectively with external electrical The cathode in source is electrically connected, and the resistance R4 is electrically connected between the collector of the optocoupler U1 and the anode of the thyristor Q2.
Since coil immediate current is very big in normally closed working condition and movement by the lower electric contactor KM, peripheral control unit The lower electric control signal 2 of output is worked by photoelectrical coupler U1 isolation control thyristor Q2, the lower electric contactor KM line bud, It connects slotting JMP2, thyristor Q2, diode D1, diode D2 and battery cathode and is sequentially formed circulation loop, to be connect to lower electricity The power supply afterflow of tentaculum KM line bud.When battery lower electricity, the cathode of the diode D1, diode D2 cathode respectively with electricity The electrical connection of the cathode of pond and external power supply, the cathode of the diode D1 and the cathode of diode D2 are considered as phase mutual conductance It is logical;When electric under battery, cathode, the cathode of diode D2 of the diode D1 is disconnected with the cathode of battery and external power supply respectively Connection is opened, the cathode of diode D1 and the cathode of diode D2 are also disconnected from each other.
The lower electric control signal of electric control circuit under communication power supply of the invention, peripheral control unit output passes through contactor function The conversion of energy conversion circuit and power supply circuit exports, then passes through lower electric control circuit and issue the movement that signal controls lower electric contactor Lower Electricity Functional is completed, realizing battery can be electric on the lower, reaches electric control circuit technical indicator under the communication power supply of national regulation and wants It asks, and is applied in communication power supply actual circuit.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (4)

1. electric control circuit under a kind of communication power supply, it is characterised in that: supplied including contactor function conversion circuit, lower electric contactor Circuit, lower electric control circuit and lower electric contactor KM descend electric control signal to access the contactor function conversion circuit all the way, Electric control signal accesses the lower electric contactor power supply circuit, the lower electric contactor power supply circuit and lower electric control under another way Circuit is electrically connected with the lower electric control circuit respectively, and the lower electric control circuit is electrically connected with the lower electric contactor KM, institute Lower electric contactor KM is stated to be connected electrically between battery and external loading.
2. electric control circuit under communication power supply according to claim 1, it is characterised in that: the lower electric control circuit includes Resistance R5, resistance R6, resistance R7, resistance R8, resistance R9, capacitor C3, diode D3, diode D4, diode D5, metal-oxide-semiconductor Q3, Triode Q4 and relay RLY1 descends electric control signal to access the base stage of the triode Q4, institute by the resistance R8 all the way The collector for stating triode Q4 is electrically connected with the first output end of the contactor function conversion circuit, the hair of the triode Q4 Emitter grounding, and the resistance R9 is electrically connected between the emitter and base stage of the triode Q4, the grid of the metal-oxide-semiconductor Q3 It is in sequential series between external power supply to have the resistance R7 and resistance R5, and the common end of the resistance R7 and resistance R5 and ground Between be parallel with the source electrode ground connection of the resistance R6 and capacitor C3, the metal-oxide-semiconductor Q3, the drain electrode of the metal-oxide-semiconductor Q3 is contacted with described The third input terminal of device function conversion circuit is electrically connected, anode and the contactor function conversion circuit of the diode D3 Second output terminal electrical connection, the cathode of the diode D3 are electrically connected with external power supply, the coil of the relay RLY1 and institute Diode D3 parallel connection is stated, the common of the relay RLY1 is electrically connected with the anode of the diode D4, the diode The cathode of D4 is electrically connected with coil one end of lower electric contactor KM, the coil other end of the lower electric contactor KM and two pole The anode electrical connection of pipe D4, the normally opened contact of the relay RLY1 is unloaded, the normally-closed contact of the relay RLY1 with it is described The third output end of contactor function conversion circuit is electrically connected, anode and the contactor function conversion electricity of the diode D5 4th input terminal on road is electrically connected, and the cathode of the diode D5 is electrically connected with the cathode of battery.
3. electric control circuit under communication power supply according to claim 2, it is characterised in that: the contactor function conversion electricity Road includes connecting insert JMP1, connect to insert JMP2 and connect and insert JMP3, and No. 1 pin for inserting JMP1 that connects is as first input end It is electrically connected with the anode of diode D3, it is described to connect No. 2 pins for inserting JMP1 as the first output end with the triode Q4's Collector electrical connection, No. 3 pins for connecting slotting JMP1 pass through the capacitor C3 as the second input terminal and are grounded, the connection No. 1 pin for inserting JMP3 is electrically connected as third input terminal with the drain electrode of the metal-oxide-semiconductor Q3, and No. 2 for connecting slotting JMP3 are drawn Foot is electrically connected as second output terminal with the anode of the diode D3, and No. 1 pin for connecting slotting JMP2 is defeated as the 4th Enter end be electrically connected with the anode of the diode D5, No. 2 pins of the slotting JMP2 of connection as third output end with it is described after The normally-closed contact of electric appliance RLY1 is electrically connected, and No. 3 pins for inserting JMP2 that connect are as the 5th output end and the lower electrical contact The electrical connection of device power supply circuit.
4. electric control circuit under communication power supply according to claim 3, it is characterised in that: the lower electric contactor power supply electricity Road include resistance R1, resistance R2, resistance R3, resistance R4, capacitor C1, capacitor C2, diode D1, diode D2, diode ZD1, Triode Q1, thyristor Q2 and optocoupler U1, electric control signal accesses the triode Q1's by the resistance R2 under another way Base stage, the grounded collector of the triode Q1, the emitter of the triode Q1 are electrically connected with the cathode of the optocoupler U1, institute The anode for stating optocoupler U1 is electrically connected by the resistance R1 with external power supply, the emitter of the optocoupler U1 and the thyristor Q2 Gate pole electrical connection, the resistance R3 and capacitor are parallel between the emitter of the optocoupler U1 and the cathode of the thyristor Q2 C1, the anode of the thyristor Q2 are electrically connected with the 5th output end of the contactor function conversion circuit, the optocoupler U1's The collector and the diode of the capacitor C2, the optocoupler U1 are electrically connected between collector and the thyristor Q2 cathode The cathode of ZD1 is electrically connected, and the anode of the diode ZD1 is electrically connected with the thyristor Q2 cathode, the yin of the thyristor Q2 Pole is electrically connected with the anode of the diode D1 and the positive of the diode D2 respectively, the cathode of the diode D1 and described The cathode of diode D2 is electrically connected with the cathode of external power supply and battery respectively, the collector and the thyristor of the optocoupler U1 The resistance R4 is electrically connected between the anode of Q2.
CN201910663804.2A 2019-07-23 2019-07-23 Power-down control circuit of communication power supply Active CN110289660B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112947189A (en) * 2021-02-07 2021-06-11 武汉麦格米特电气有限公司 Multi-path power-on/power-off control circuit and communication power supply system

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