CN204103447U - A kind of undervoltage protection device - Google Patents
A kind of undervoltage protection device Download PDFInfo
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- CN204103447U CN204103447U CN201420541311.4U CN201420541311U CN204103447U CN 204103447 U CN204103447 U CN 204103447U CN 201420541311 U CN201420541311 U CN 201420541311U CN 204103447 U CN204103447 U CN 204103447U
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Abstract
A kind of undervoltage protection device, belongs to low voltage electrical apparatus technology field.Comprise rectification circuit, power circuit, voltage sample circuit, microcontroller circuit, drive circuit and under-voltage coil, power circuit connects rectification circuit, voltage sample circuit is connected with rectification circuit and microcontroller circuit, microcontroller circuit is connected with drive circuit, under-voltage coil is connected with rectification circuit and drive circuit, also comprise accumulator, accumulator and rectification circuit, power circuit, microcontroller circuit and under-voltage coil connect, powered to accumulator by rectification circuit when external power source is normal, when there is under-voltage or decompression in external power source, accumulator under the control of microcontroller circuit to power circuit and under-voltage coil power supply.Advantage: there is under voltage protection function, delay function and shutting-brake control function, the structure of single module can reduce complexity and the error rate of wiring; Reduce space hold; Accuracy of detection is high, and operating point is accurate, uses reliable.
Description
Technical field
The utility model belongs to low voltage electrical apparatus technology field, is specifically related to a kind of undervoltage protection device.
Background technology
Device for under-voltage releasing equipment, when certain voltage drop occurs the supply voltage of protected circuit, automatically can be cut off the electricity supply by cut-off breaker, make the damage of electric equipment under voltage of this circuit breaker load side.Device for under-voltage releasing equipment plays an important role to support equipment and personal safety, in recent years obtains extensive application.During use, device for under-voltage releasing equipment coil (being called for short under-voltage coil) is connected on the mains side of circuit breaker, and circuit breaker only could close a floodgate after device for under-voltage releasing equipment energising.Along with the development of new energy technology, photovoltaic generation is widelyd popularize, and in photovoltaic power generation grid-connecting occasion, often needs device for under-voltage releasing equipment band delay function; In addition, in the general distribution applications beyond photovoltaic generation, sometimes in order to prevent device for under-voltage releasing equipment from reducing because of the voltage of short time or interrupting and make the situation of circuit breaker tripping occur, also needing device for under-voltage releasing equipment band delay function, using the reliability improving electricity consumption.
The device for under-voltage releasing equipment of existing breaker of plastic casing, when needs arrange delay function, conventional scheme increases outside time delay module, and such defect is: increase wiring difficulty and error rate; The outside time delay module occupying volume external space, brings a definite limitation to actual installing and using.In addition, existing device for under-voltage releasing equipment is not with shutting-brake control function usually, and whether described shutting-brake control function refers to by device for under-voltage releasing equipment normal to detect voltage, after voltage resume is normal, control the closing operation that electricity behaviour carries out circuit breaker by under-voltage module.Traditional device for under-voltage releasing equipment needs the expansion that could realize closing function by the voltage relay of outside or other device, not only increases cost, also further increases the complexity of wiring, increase application difficulty.
In view of above-mentioned prior art, the applicant has done useful design, and technical scheme described below produces under this background.
Summary of the invention
The purpose of this utility model is to provide a kind of undervoltage protection device, has under voltage protection function, delay function and shutting-brake control function, and the structure of single module can simplify external cabling, convenient installation; Accuracy of detection is high, use is reliable.
The purpose of this utility model reaches like this, a kind of undervoltage protection device, comprise rectification circuit, power circuit, voltage sample circuit, microcontroller circuit, drive circuit and under-voltage coil, described rectification circuit connects external power source, power circuit connects rectification circuit, voltage sample circuit is connected with rectification circuit and microcontroller circuit, microcontroller circuit is connected with drive circuit, under-voltage coil is connected with rectification circuit and drive circuit, it is characterized in that: also comprise accumulator, described accumulator and rectification circuit, power circuit, microcontroller circuit and under-voltage coil connect, powered to accumulator by rectification circuit when external power source is normal, when there is under-voltage or decompression in external power source, accumulator under the control of microcontroller circuit to power circuit and under-voltage coil power supply.
In a specific embodiment of the present utility model, described undervoltage protection device also comprises delay setting circuit, and described delay setting circuit is connected with microcontroller circuit, and described delay setting circuit adopts DIP switch or rotary encoder switch.
In another specific embodiment of the present utility model, drive circuit comprises driving chip N3 and second switch pipe V2, described power circuit is connected with driving chip N3 for driving chip N3 provides power supply, described microcontroller circuit is connected with driving chip N3, transmit control signal to driving chip N3, the output of driving chip N3 connects the control end of second switch pipe V2, and second switch pipe V2 and under-voltage coils connected in series are connected between power supply and ground.
In another specific embodiment of the present utility model, described undervoltage protection device also comprises the contacting controling circuit be connected with outside motor-operating mechanism, and described contacting controling circuit is connected with described microcontroller circuit.
In another specific embodiment of the present utility model, described contacting controling circuit is connected outside motor-operating mechanism by optocoupler, is exported isolation control signal.
Also have in a specific embodiment of the present utility model, described contacting controling circuit connects outside motor-operating mechanism by relay, utilizes relay contact to export control signal.
More of the present utility model and in a specific embodiment, described accumulator comprises the 7th resistance R7, 8th resistance R8, 9th resistance R9, 7th diode D7, 8th diode D8, 9th diode D9, 3rd electric capacity C3, first optocoupler N4 and the 3rd switching tube V3, one end of the 7th described resistance R7 connects an input of the first optocoupler N4, the microcontroller circuit described in the connection of another input of the first optocoupler N4, an output of the first optocoupler N4 is connected with one end of the control end of the 3rd switching tube V3 and the 8th resistance R8, the output of the 3rd switching tube V3 is connected with another output of the first optocoupler N4 and the 8th diode D8 positive pole, the input of the 3rd switching tube V3 is connected with the positive pole of the negative pole of the 7th diode D7 and the 3rd electric capacity C3, the positive pole of the 7th diode D7 is connected with one end of the negative pole of the 9th diode D9 and the 9th resistance R9, the power circuit described in other end connection of the 7th resistance R7, the other end of the 8th resistance R8, the negative pole of the 8th diode D8 and the other end of the 9th resistance R9 connect described rectification circuit jointly, the negative pole of the 3rd electric capacity C3 and the positive pole common ground of the 9th diode D9.
In an of the present utility model and then specific embodiment; described undervoltage protection device also comprises state input circuit; described state input circuit is connected with described microcontroller circuit, and microcontroller circuit connects and receive the receipts contact signal corresponding with the conjunction point position of circuit breaker from state input circuit.
Of the present utility model again more and in a specific embodiment, described undervoltage protection device also comprises telecommunication circuit, described telecommunication circuit connects microcontroller circuit, for realizing the exchanges data with host computer.
The utility model owing to have employed said structure, compared with prior art, the beneficial effect had:
1. carry out real-time sampling by microprocessor to voltage signal, under-voltage accuracy of detection is high, operating point is accurate;
2. can select delay time in relative broad range, can effectively avoid occurring to reduce because of the voltage of short time or interrupt and make the situation of circuit breaker tripping, and delay time be by Microprocessor S3C44B0X, has very high accuracy;
3. there is shutting-brake control function, after making breaker open operation because there is under-voltage or decompression, if line voltage distribution recovers normal, motor-operating mechanism can controlled to circuit breaker and implement automatic closing, realize unattended operation;
4. circuit-breaker status can be uploaded to host computer by utilization state input circuit in real time, realizes communication function;
5. by under voltage protection function, delay function, shutting-brake control Function Integration Mechanism in the same module; this single modular structure is compared with traditional multimode scheme; reduce complexity and the error rate of wiring; it can be arranged on the side of circuit breaker; install simple; easy to use, decrease taking of space.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is an embodiment electrical connection schematic diagram of rectification circuit described in the utility model.
Fig. 3 is an embodiment electrical connection schematic diagram of power circuit described in the utility model.
Fig. 4 is an embodiment electrical connection schematic diagram of voltage sample circuit described in the utility model, delay setting circuit and microcontroller circuit.
Fig. 5 is an embodiment electrical connection schematic diagram of drive circuit described in the utility model and under-voltage coil.
Fig. 6 is an embodiment electrical connection schematic diagram of accumulator described in the utility model.
Fig. 7 is an embodiment electrical connection schematic diagram of contacting controling circuit described in the utility model.
Fig. 8 is another embodiment electrical connection schematic diagram of contacting controling circuit described in the utility model.
Fig. 9 is an embodiment electrical connection schematic diagram of state input circuit described in the utility model.
Figure 10 is an embodiment electrical connection schematic diagram of telecommunication circuit described in the utility model.
Embodiment
Applicant will describe in detail embodiment of the present utility model below by reference to the accompanying drawings; but applicant is not the restriction to technical scheme to the description of embodiment, any changing in the form rather than substance according to the utility model design all should be considered as protection range of the present utility model.
Refer to Fig. 1, the utility model relates to a kind of undervoltage protection device, comprise rectification circuit, power circuit, voltage sample circuit, microcontroller circuit, drive circuit and under-voltage coil, described rectification circuit connects external power source, reception external voltage inputs, the input of power circuit connects the output of rectification circuit, the input of voltage sample circuit is connected with the output of rectification circuit, the output of voltage sample circuit is connected with the input of microcontroller circuit, the output of microcontroller circuit is connected with the input of drive circuit, under-voltage coil is connected with rectification circuit and drive circuit.Described undervoltage protection device also comprises: delay setting circuit, and described delay setting circuit is connected with microcontroller circuit; Accumulator, described accumulator is connected with rectification circuit, power circuit, microcontroller circuit and under-voltage coil; Contacting controling circuit, described contacting controling circuit is connected with described microcontroller circuit and outside motor-operating mechanism, contacting controling circuit can be connected outside motor-operating mechanism, be exported isolation control signal by optocoupler, also outside motor-operating mechanism can be connected by relay, relay contact is utilized to export control signal, motor-operating mechanism is connected with circuit breaker, controls separating brake and the combined floodgate of circuit breaker; State input circuit, described state input circuit is connected with described microcontroller circuit, and the contact signal that transmission and the conjunction of circuit breaker divide position corresponding is to microcontroller circuit; Telecommunication circuit, described telecommunication circuit connects microcontroller circuit, for realizing the exchanges data with host computer.Described power circuit is microcontroller circuit, drive circuit, accumulator, contacting controling circuit, state input circuit and telecommunication circuit provide power supply.
Refer to Fig. 2, described rectified current comprises the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, and the first described diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 form rectifier bridge.Voltage input forms Voltage pulsating direct-current supply V+, for power circuit, voltage sample circuit, under-voltage coil and accumulator provide power supply after rectifier bridge rectification.
Refer to Fig. 3, described power circuit is each circuit supply of rear class, power circuit comprises the first resistance R1, the second resistance R2, the first electric capacity C1, the second electric capacity C2, the first switching tube V1, the 5th diode D5 and power supply chip N1, the first described switching tube V1 is metal-oxide-semiconductor, the 5th described diode D5 is voltage-stabiliser tube, described power supply chip N1 preferentially selects low-power consumption linear voltage decreasing device or the switch chip based on DC-DC shift theory, can adopt TPS76050 in the present embodiment.One end of the first described resistance R1 is connected Voltage pulsating direct-current supply V+ jointly with one end of the second resistance R2, the other end of the first resistance R1 is connected with the negative pole of the grid of the first switching tube V1 and the 5th diode D5, the drain electrode of the first switching tube V1 is connected with the other end of the second resistance R2, the source electrode of the first switching tube V1 and one end of the first electric capacity C1 and the input 1 of power supply chip N1, 3 pin connect, and export the first DC power supply VCC, output 5 pin of power supply chip N1 is connected with one end of the second electric capacity C2, and export the second DC power supply VDD, the positive pole of the 5th diode D5 and the other end of the first electric capacity C1, earth terminal 2 pin of power supply chip N1 and the other end common ground of the second electric capacity C2.Described Voltage pulsating direct-current supply V+ is after the first resistance R1 dividing potential drop, and the cut-in voltage that formation one is stable on the 5th diode D5 makes the first switching tube V1 conducting, and now, Voltage pulsating direct-current supply V+ charges to the first electric capacity C1 through the second resistance R2 and the first switching tube V1.Voltage rise on first electric capacity C1, until reach stable after the unlatching pressure drop VGS of about first switching tube V1 lower than the voltage on the 5th diode D5, form the first DC power supply VCC(herein, also can adopt the mode of resistance and voltage-stabiliser tube step-down, but power consumption can increase).First DC power supply VCC produces the second DC power supply VDD by power supply chip N1, and the second described DC power supply VDD is system operating voltage.
Refer to Fig. 4, described voltage sample circuit gathers the information of voltage of institute's protective circuit, and voltage sample circuit comprises the 3rd resistance R3 and the 4th resistance R4; Described delay setting circuit can adopt DIP switch or rotary encoder switch, in the present embodiment, have employed DIP switch S1, and model can be DS-04; Described microcontroller circuit comprises microprocessor N2, the 5th resistance R5 and the 6th resistance R6, microprocessor N2 adopt RL78/13.One end of the 3rd described resistance R3 connects Voltage pulsating direct-current supply V+, and the other end of the 3rd resistance R3 is connected with one end of the 4th resistance R4, and common input 20 pin connecting microprocessor N2,1 of DIP switch S1, 2, 3, 4 pin connect the input 14 of microprocessor N2 respectively, 13, 12, 11 pin, input 4 pin of microprocessor N2 connects one end of the 5th resistance R5, 5 pin of microprocessor N2 connect one end of the 6th resistance R6, the accumulator described in the connection of output 1 pin of microprocessor N2, the drive circuit described in the connection of output 2 pin of microprocessor N2, the output 15 of microprocessor N2, 16, telecommunication circuit described in 17 pin connect, the output 18 of microprocessor N2, contacting controling circuit described in 19 pin connect, the other end of the 5th resistance R5, the other end of the 6th resistance R6 and power end 10 pin of microprocessor N2 connect the second DC power supply VDD, the other end of the 4th resistance R4 jointly, 5 of DIP switch S1, 6, 7, the 9 pin common grounds of 8 pin and microprocessor N2, input 8 pin of microprocessor N2 is connected with state input circuit.Described voltage sampling circuit is sampled Voltage pulsating direct-current supply V+ dividing potential drop by the 3rd resistance R3 and the 4th resistance R4, and on the 4th resistance R4 coating-forming voltage sampled signal, the A/D end of this sampled signal input microprocessor N2, carries out the analog-and digital-conversion of signal.Delay setting circuit adopts DIP switch S1 to carry out time setting, and the setting range of delay time can be selected the DIP switch of not isotopic number to regulate as required, in addition, also can be regulated by modes such as potentiometers.Special, in the application scenario that delay time is fixing, also can not service time configuration switch.
Refer to Fig. 5, described drive circuit for control under-voltage coil electric and dead electricity, drive circuit comprises driving chip N3 and second switch pipe V2.Described power circuit is connected with driving chip N3, for driving chip N3 provides power supply, described microcontroller circuit is connected with driving chip N3, transmit control signal to driving chip N3, the output of driving chip N3 connects the control end of second switch pipe V2, second switch pipe V2 and under-voltage coils connected in series are connected between power supply and ground, and power supply is herein Voltage pulsating direct-current supply V+.Voltage pulsating direct-current supply V+ is provided by rectification circuit when system normal operation, is provided by accumulator when system is under-voltage.In the present embodiment, described driving chip N3 adopts MAX5078, second switch pipe V2 can be metal-oxide-semiconductor.Power end 4 pin of driving chip N3 connects the first DC power supply VCC, output 5 pin of driving chip N3 connects control end, the i.e. grid of second switch pipe V2, one end of the under-voltage coil L1 described in drain electrode connection of second switch pipe V2, the other end of under-voltage coil L1 connects Voltage pulsating direct-current supply V+, 6 pin of driving chip N3 connect pwm signal output 2 pin, 1 ~ 3 pin of driving chip N3 and the source electrode common ground of second switch pipe V2 of the microprocessor N2 in microcontroller circuit.The two ends of described under-voltage coil L1 are parallel with the 6th diode D6, and the 6th described diode D6 is fly-wheel diode.Under-voltage coil L1 is powered by Voltage pulsating direct-current supply V+, after driving chip N3 obtains a pwm control signal from microprocessor N2, drives second switch pipe V2 work, makes under-voltage coil L1 obtain electric, thus circuit breaker is in can "on" position.Adopting the object of driving chip N3 to be driving voltage in order to improve second switch pipe V2 and switching speed, strengthening the reliability of its work.Certainly, between the source electrode that also under-voltage coil L1 and the 6th diode D6 in parallel with it can be connected on second switch pipe V2 and ground, the drain electrode of second switch pipe V2 is connected with Voltage pulsating direct-current supply V+.
Refer to Fig. 6, described accumulator receives electric energy when external power source is normal from rectification circuit, and stored electric energy; And when under-voltage or decompression occur external power source, to power circuit and under-voltage coil power supply under the control of microcontroller circuit.Accumulator comprises the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the 7th diode D7, the 8th diode D8, the 9th diode D9, the 3rd electric capacity C3, the first optocoupler N4 and the 3rd switching tube V3, the first described optocoupler N4 can adopt TLP127, and the 3rd described switching tube V3 can be metal-oxide-semiconductor.One end of the 7th described resistance R7 connects input 1 pin of the first optocoupler N4, 1 pin of the microprocessor N2 in the microcontroller circuit described in the connection of another input 3 pin of the first optocoupler N4, output 6 pin of the first optocoupler N4 is connected with the grid of the 3rd switching tube V3 and one end of the 8th resistance R8, the source electrode of the 3rd switching tube V3 is connected with the positive pole of second output 4 pin of the first optocoupler N4 and the 8th diode D8, the drain electrode of the 3rd switching tube V3 is connected with the positive pole of the negative pole of the 7th diode D7 and the 3rd electric capacity C3, the positive pole of the 7th diode D7 is connected with one end of the negative pole of the 9th diode D9 and the 9th resistance R9, the other end of the 7th resistance R7 connects the second DC power supply VDD, the other end of the 8th resistance R8, the negative pole of the 8th diode D8 and the other end of the 9th resistance R9 connect Voltage pulsating direct-current supply V+ jointly, the negative pole of the 3rd electric capacity C3 and the positive pole common ground of the 9th diode D9.9th resistance R9 is current-limiting resistance; 8th diode D8 plays anti-reaction; 9th diode D9 is Zener diode or Transient Voltage Suppressor (abbreviation TVS pipe); 3rd electric capacity C3 can be one or more Capacitance parallel connection composition, also can adopt lithium battery.When outside line voltage is normal, Voltage pulsating direct-current supply V+ is charged to the 3rd electric capacity C3 by the 9th resistance R9 and the 7th diode D7, and the ceiling voltage of charging is the voltage stabilizing value of the 9th diode D9.Between charge period, the time delay power supplying control signal YS that microprocessor N2 exports is low level, and the first optocoupler N4 conducting, between the gate-source of the 3rd switching tube V3, pressure drop diminishes, and the 3rd switching tube V3 turns off.When needs time delay is powered, the time delay power supplying control signal YS that microprocessor N2 exports becomes high level, first optocoupler N4 ends, 3rd switching tube V3 pressure drop between gate-source reaches conducting after cut-in voltage, 3rd electric capacity C3 starts electric discharge, for returning for Voltage pulsating direct-current supply V+, the energy realizing time delay under-voltage provides.The implementation that this energy provides can also simplify, such as the 3rd electric capacity C3 is connected directly to Voltage pulsating direct-current supply V+, so just control capacitance is not needed to discharge, but the mean value of Voltage pulsating direct-current supply V+ can be improved simultaneously, also can improve the requirement of withstand voltage to the 3rd electric capacity C3, also have impact to the heating of under-voltage coil L1 in addition.
Refer to Fig. 7, described contacting controling circuit for exporting control signal to motor-operating mechanism, thus controls combined floodgate and the separating brake of circuit breaker.Contacting controling circuit comprises the tenth resistance R10, the 11 resistance R11, the second optocoupler N5 and the 3rd optocoupler N6, and wherein, the tenth resistance R10 and the 11 resistance R11 is current-limiting resistance, and the second optocoupler N5 and the 3rd optocoupler N6 adopts TLP127.One end of tenth resistance R10 connects input 1 pin of the second optocoupler N5, output 19 pin of the microprocessor N2 in the microcontroller circuit described in the connection of another input 3 pin of the second optocoupler N5, one end of 11 resistance R11 connects input 1 pin of the 3rd optocoupler N6, another input 3 pin of 3rd optocoupler N6 connects output 18 pin of microprocessor N2, the other end of the tenth resistance R10 is connected the second DC power supply VDD jointly with the other end of the 11 resistance R11, output 6 pin of the second optocoupler N5, output 6 pin of another output 4 pin and the 3rd optocoupler N6, another output 4 pin connects motor-operating mechanism jointly.In the present embodiment, by the second optocoupler N5 and the 3rd optocoupler N6 export respectively combined floodgate and sub-gate signal to motor-operating mechanism.When the sub-gate signal FZ that microprocessor N2 exports is low level, the second DC power supply VDD forms loop by the tenth resistance R10, the second optocoupler N5 conducting, exports separating brake contact signal to motor-operating mechanism.Shutting-brake control is identical with the principle that separating brake controls.
Refer to Fig. 8, described contacting controling circuit also comprises the 12 resistance R12, the 13 resistance R13, the tenth diode D10, the 11 diode D11, the 4th switching tube V4, the 5th switching tube V5, the first relay K 1 and the second relay K 2, the 4th described switching tube V4 and the 5th switching tube V5 is triode, first relay K 1 adopts HF32FA, and the second relay K 2 adopts HF32FA.Tenth diode D10 and the 11 diode D11 plays afterflow effect, and the 12 resistance R12 and the 13 resistance R13 is current-limiting resistance.Output 18 pin of the microprocessor N2 in the microcontroller circuit described in the connection of one end of the 12 resistance R12, the other end of the 12 resistance R12 connects the base stage of the 4th switching tube V4, and the collector electrode of the 4th switching tube V4 is connected with negative terminal 16 pin of the positive pole of the tenth diode D10 and the first relay K 1.One end of 13 resistance R13 connects output 19 pin of microprocessor N2, the other end of the 13 resistance R13 connects the base stage of the 5th switching tube V5, the collector electrode of the 5th switching tube V5 is connected with negative terminal 16 pin of the positive pole of the 11 diode D11 and the second relay K 2, the negative pole of the tenth diode D10, the negative pole of the 11 diode D11, anode 1 pin of the first relay K 1 and anode 1 pin of the second relay K 2 connect the first DC power supply VCC jointly, the emitter of the 4th switching tube V4 and the emitter common ground of the 5th switching tube V5, the motion end 5 of the first relay K 1, 5 of the motion end of 8 pin and the second relay K 2, 8 pin connect motor-operating mechanism jointly.In this embodiment, by the first relay K 1 and the second relay K 2 export respectively close a floodgate and sub-gate signal to motor-operating mechanism, utilize relay contact output control signal to motor-operating mechanism.
Refer to Fig. 9, the circuit breaker position signal that described state input circuit sends for the additional alarm module received in circuit breaker, and send it to microcontroller circuit, state input circuit comprises the 14 resistance R14, the 15 resistance R15, the 16 resistance R16 and the 6th switching tube V6, the 6th described switching tube V6 is triode, and the 14 resistance R14 and the 15 resistance R15 is current-limiting resistance.One end of 15 resistance R15 is connected with the base stage of one end of the 16 resistance R16 and the 6th switching tube V6, and common connection is auxiliary or the output (illustrated FB) of alarm module, the collector electrode of the 6th switching tube V6 is connected with one end of the 14 resistance R14, and be jointly connected to input 8 pin of microprocessor N2, the other end of the 15 resistance R15 is connected the first DC power supply VCC jointly with the other end of the 14 resistance R14, the other end of the 16 resistance R16 and the emitter common ground of the 6th switching tube V6.When the contact signal that the FB signal that circuit breaker provides is off, the first DC power supply VCC controls the 6th switching tube V6 conducting after the 15 resistance R15 and the 16 resistance R16 dividing potential drop, and the ZT signal of the correspondence that microprocessor N2 obtains is low level.When FB signal is closed contact signal, the 6th switching tube V6 ends, and the ZT signal of the correspondence that microprocessor N2 obtains is high level.Microprocessor N2 is according to the low and high level of ZT signal, and can determine circuit breaker is be in combined floodgate, separating brake or trip status, and concrete corresponding relation can be determined as required.Such as can be set as representing separating brake when ZT signal is high level, represent combined floodgate when ZT signal is low level, also can adopt contrary corresponding relation.Certainly, state input circuit can also adopt the mode of optocoupler, or directly uses electric resistance partial pressure.
Refer to Figure 10, described telecommunication circuit is for realizing the communication with host computer.Telecommunication circuit comprises communication chip N7, the 12 diode D12 and the 13 diode D13, and communication chip N7 adopts the RS485 chip of band isolation features, adopts ISO1176 herein; 12 diode D12 and the 13 diode D13 is TVS pipe.Output 16 pin of the microprocessor N2 in the microcontroller circuit described in the connection of input 3 pin of described communication chip N7, output 4,5 pin of communication chip N7 connects output 17 pin of microprocessor N2 jointly, input 6 pin of communication chip N7 connects output 15 pin of microprocessor N2, output 12 pin of communication chip N7 is connected with one end of the 12 diode D12, output 13 pin of communication chip N7 is connected with one end of the 13 diode D13, and output 12,13 pin of communication chip N7 also connects host computer.Signal of communication TXD, SCK, RXD that microprocessor N2 exports convert signal of communication A, B to through communication chip N7, and are uploaded to host computer.The 12 described diode D12 and the 13 diode D13 is used for EMC protection.Herein, optocoupler can also be adopted realize isolation.
Please continue to refer to Fig. 1, and composition graphs 2 to Figure 10, described microprocessor N2 powers on, and after system reset to be done and initialization, by reading the state of DIP switch S1, obtains the setup parameter of corresponding delay time.When microprocessor N2 detects that voltage signal reaches predetermined value, such as 85%Un(or other suitable value are as 70% etc.) time, send a pwm control signal to drive circuit.Drive circuit controls second switch pipe V2 work, makes under-voltage coil L1 obtain electric, and circuit breaker is in can "on" position; Then, microprocessor N2 sends sub-gate signal FZ and switching signal HZ in order to contacting controling circuit, realizes the automatic switching-in function of circuit breaker in conjunction with motor-operating mechanism.For the contacting controling circuit shown in Fig. 7, now, switching signal HZ is low level, and the second DC power supply VDD forms loop by the 11 resistance R11, the 3rd optocoupler N6 conducting, exports closing contact signal, breaker closing to motor-operating mechanism.The contact signal that microprocessor N2 is provided by the additional alarm module in state input circuit reception circuit breaker, judge the location status of circuit breaker thus, microprocessor N2, after receiving corresponding circuit breaker position status signal, uploads the location status of circuit breaker by telecommunication circuit.When judging that external voltage occurs under-voltage, microprocessor N2 enters delays time to control pattern, sends the time delay power supplying control signal YS of a high level to accumulator, and the first optocoupler N4 in accumulator ends.3rd switching tube V3 produces one and opens conducting after pressure drop between grid and source electrode, thus controls energy storage capacitor i.e. the 3rd electric capacity C3 and power to under-voltage coil L1 and power circuit, enters delay working pattern.After continue for the delay time of setting, time-delay closing, then microprocessor N2 stops exporting pwm control signal, under-voltage coil L1 dead electricity, breaker open operation.If microprocessor N2 detects that within delay time voltage resume is normal, then make time delay power supplying control signal YS become low level, accumulator stops the power supply to under-voltage coil L1 and power circuit, enters normal mode of operation; Microprocessor N2 also communicates with host computer by telecommunication circuit, uploads voltage and circuit-breaker status information, and realizes distant control function.By under voltage protection function, delay function, shutting-brake control Function Integration Mechanism in the same module, the structure of single module can reduce complexity to external connection and error rate to undervoltage protection device described in the utility model; The side of circuit breaker can be arranged on, install simple, easy to use, decrease taking of space; Accuracy of detection is high, and operating point is accurate, and dependability is high.
Claims (9)
1. a undervoltage protection device, comprise rectification circuit, power circuit, voltage sample circuit, microcontroller circuit, drive circuit and under-voltage coil, described rectification circuit connects external power source, power circuit connects rectification circuit, voltage sample circuit is connected with rectification circuit and microcontroller circuit, microcontroller circuit is connected with drive circuit, under-voltage coil is connected with rectification circuit and drive circuit, it is characterized in that: also comprise accumulator, described accumulator and rectification circuit, power circuit, microcontroller circuit and under-voltage coil connect, powered to accumulator by rectification circuit when external power source is normal, when there is under-voltage or decompression in external power source, accumulator under the control of microcontroller circuit to power circuit and under-voltage coil power supply.
2. a kind of undervoltage protection device according to claim 1, is characterized in that: also comprise delay setting circuit, and described delay setting circuit is connected with microcontroller circuit, and described delay setting circuit adopts DIP switch or rotary encoder switch.
3. a kind of undervoltage protection device according to claim 1, is characterized in that: described drive circuit comprises driving chip N3 and second switch pipe V2, and described power circuit is connected with driving chip N3, for driving chip N3 provides power supply; Described microcontroller circuit is connected with driving chip N3, transmits control signal to driving chip N3; The output of driving chip N3 connects the control end of second switch pipe V2, and second switch pipe V2 and under-voltage coils connected in series are connected between power supply and ground.
4. a kind of undervoltage protection device according to claim 1, is characterized in that: described undervoltage protection device also comprises the contacting controling circuit be connected with outside motor-operating mechanism, and described contacting controling circuit is connected with described microcontroller circuit.
5. a kind of undervoltage protection device according to claim 4, is characterized in that: described contacting controling circuit is connected outside motor-operating mechanism by optocoupler, exported isolation control signal.
6. a kind of undervoltage protection device according to claim 4, is characterized in that: described contacting controling circuit connects outside motor-operating mechanism by relay, utilizes relay contact to export control signal.
7. a kind of undervoltage protection device according to claim 1, it is characterized in that: described accumulator comprises the 7th resistance R7, 8th resistance R8, 9th resistance R9, 7th diode D7, 8th diode D8, 9th diode D9, 3rd electric capacity C3, first optocoupler N4 and the 3rd switching tube V3, one end of the 7th described resistance R7 connects an input of the first optocoupler N4, the microcontroller circuit described in the connection of another input of the first optocoupler N4, an output of the first optocoupler N4 is connected with one end of the control end of the 3rd switching tube V3 and the 8th resistance R8, the output of the 3rd switching tube V3 is connected with another output of the first optocoupler N4 and the 8th diode D8 positive pole, the input of the 3rd switching tube V3 is connected with the positive pole of the negative pole of the 7th diode D7 and the 3rd electric capacity C3, the positive pole of the 7th diode D7 is connected with one end of the negative pole of the 9th diode D9 and the 9th resistance R9, the power circuit described in other end connection of the 7th resistance R7, the other end of the 8th resistance R8, the negative pole of the 8th diode D8 and the other end of the 9th resistance R9 connect described rectification circuit jointly, the negative pole of the 3rd electric capacity C3 and the positive pole common ground of the 9th diode D9.
8. a kind of undervoltage protection device according to claim 1; it is characterized in that: described undervoltage protection device also comprises state input circuit; described state input circuit is connected with described microcontroller circuit, and microcontroller circuit receives the contact signal dividing position corresponding with the conjunction of circuit breaker from state input circuit.
9. a kind of undervoltage protection device according to claim 1, is characterized in that: described undervoltage protection device also comprises telecommunication circuit, and described telecommunication circuit connects microcontroller circuit, for realizing the exchanges data with host computer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420541311.4U CN204103447U (en) | 2014-09-19 | 2014-09-19 | A kind of undervoltage protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420541311.4U CN204103447U (en) | 2014-09-19 | 2014-09-19 | A kind of undervoltage protection device |
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| CN204103447U true CN204103447U (en) | 2015-01-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514935A (en) * | 2016-01-27 | 2016-04-20 | 常熟开关制造有限公司(原常熟开关厂） | Undervoltage controller having time delay function and control method thereof |
| CN107395136A (en) * | 2017-08-31 | 2017-11-24 | 成都四威功率电子科技有限公司 | A kind of protection circuit applied to gallium nitride and GaAs Power amplifier |
| CN107546711B (en) * | 2016-06-29 | 2019-12-24 | 三菱电机大楼技术服务株式会社 | Power plant system and control method of power plant system |
-
2014
- 2014-09-19 CN CN201420541311.4U patent/CN204103447U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105514935A (en) * | 2016-01-27 | 2016-04-20 | 常熟开关制造有限公司(原常熟开关厂） | Undervoltage controller having time delay function and control method thereof |
| CN107546711B (en) * | 2016-06-29 | 2019-12-24 | 三菱电机大楼技术服务株式会社 | Power plant system and control method of power plant system |
| CN107395136A (en) * | 2017-08-31 | 2017-11-24 | 成都四威功率电子科技有限公司 | A kind of protection circuit applied to gallium nitride and GaAs Power amplifier |
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