CN107658838B - AC single-phase intelligent module - Google Patents

AC single-phase intelligent module Download PDF

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Publication number
CN107658838B
CN107658838B CN201711081194.2A CN201711081194A CN107658838B CN 107658838 B CN107658838 B CN 107658838B CN 201711081194 A CN201711081194 A CN 201711081194A CN 107658838 B CN107658838 B CN 107658838B
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pin
circuit
chip
power supply
resistor
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CN107658838A (en
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张坚
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Hunan Dianquan Technology Co ltd
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Hunan Dianquan Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection

Abstract

An alternating current single-phase intelligent module is composed of a box body, an intelligent electric control board, a mutual inductor and epoxy resin, wherein the intelligent electric control board 2 is arranged in the box body 1, a power supply circuit, a fault-free automatic reclosing circuit, a fault signal processing circuit, an overload circuit, a short circuit, a leakage detection circuit, a reverse power pre-detection circuit, an overvoltage and undervoltage detection circuit and a drive control circuit are arranged on the intelligent electric control board 2, a live wire and a zero wire of an external power supply end are connected into the intelligent electric control board 2 through an insert 8 and a connecting wire thereof, a live wire and a zero wire of an external load end are connected into the intelligent electric control board 2 through an insert 7 and a connecting wire thereof, and a zero sequence current transformer BL of the load end is provided with the intelligent electric control board 1 The intelligent electric control board 2 is connected with the current transformer BL at the load end through the plug-in 6 and the connecting wire thereof 2 The intelligent control board 2 is connected with the intelligent electric control board 2 through the plug-in unit 5 and the connecting wire thereof, the intelligent control board 2 outputs the zero sequence current which passes through the zero sequence current to the sensor and the live wire which passes through the current transformer through the plug-in unit 4 and the executing component which is connected with the external power supply main circuit; and finally, sealing and filling the box body 1 and the intelligent electric control board 2 into a module by using the epoxy resin adhesive 3, wherein the top of the light-emitting diode on the intelligent electric control board and the sounding surface of the buzzer are protruded on the surface of the epoxy resin adhesive. The intelligent device has the advantages of high intelligent degree, small volume, simple matched installation, convenient use and high cost performance.

Description

AC single-phase intelligent module
Technical field:
the invention relates to the technical field of intelligent protection and control of electrical equipment, in particular to an alternating current single-phase intelligent module which is arranged in electrical equipment or an access power socket and used for intelligently protecting and controlling load equipment of the electrical equipment or the power socket.
The existing electrical equipment and power sockets have no protection function, only a few high-grade electrical equipment and power sockets have the functions of on-line detection and protection of electric leakage and on-line detection and protection of overload short circuit by utilizing a protective tube, intelligent protection and intelligent control cannot be conducted at all, and therefore electrical accidents and electrical fires of the equipment are easy to cause, and meanwhile, the use is inconvenient.
The invention comprises the following steps:
the technical problems to be solved by the invention are as follows: the problems existing in the prior art are solved, and the alternating current single-phase intelligent module which can be installed in electrical equipment or a power socket is provided, and the electrical equipment and load equipment connected into the power socket are subjected to over-voltage and under-voltage pre-detection protection, on-line detection protection, overload and short-circuit pre-detection protection, on-line detection protection and reverse power pre-detection protection, and safety reclosing is automatically realized after tripping and power failure. The intelligent device has the advantages of high intelligent degree, small volume, simple matched installation, convenient use and high cost performance.
The technical scheme adopted by the invention is as follows:
an alternating current single-phase intelligent module is composed of a box body, an intelligent electric control board, a mutual inductor and epoxy resin, wherein the intelligent electric control board 2 is arranged in the box body 1, a power supply circuit, a fault-free automatic reclosing circuit, a fault signal processing circuit, an overload circuit, a short circuit, a leakage detection circuit, a reverse power pre-detection circuit, an overvoltage and undervoltage detection circuit and a drive control circuit are arranged on the intelligent electric control board 2, a live wire and a zero wire of an external power supply end are connected into the intelligent electric control board 2 through an insert 8 and a connecting wire thereof, a live wire and a zero wire of an external load end are connected into the intelligent electric control board 2 through an insert 7 and a connecting wire thereof, and a zero sequence current transformer BL of the load end is provided with the intelligent electric control board 1 The intelligent electric control board 2 is connected with the current transformer BL at the load end through the plug-in 6 and the connecting wire thereof 2 The intelligent control board 2 is connected with the intelligent electric control board 2 through the plug-in unit 5 and the connecting wire thereof, the intelligent control board 2 outputs the zero sequence current which passes through the zero sequence current to the sensor and the live wire which passes through the current transformer through the plug-in unit 4 and the executing component which is connected with the external power supply main circuit; and finally, sealing and filling the box body 1 and the intelligent electric control board 2 into a module by using the epoxy resin adhesive 3, wherein the top of the light-emitting diode on the intelligent electric control board and the sounding surface of the buzzer are protruded on the surface of the epoxy resin adhesive.
In the technical scheme, the intelligent electric control board comprises a power supply circuit, a fault-free automatic reclosing circuit, a driving control circuit, a fault signal processing circuit, an overload, short circuit and electric leakage detection circuit, a reverse power pre-detection circuit and an over-voltage and under-voltage detection circuit; the input end of the power supply circuit is connected to the power supply end of the external power supply main circuit, and the output end of the power supply circuit is connected to the fault-free automatic reclosing circuit, the driving control circuit, the fault signal processing circuit, the over-voltage and under-voltage detection circuit, the reverse power pre-detection circuit, the overload, short circuit and leakage detection circuit; the sampling end of the overload, short circuit and leakage detection circuit is connected to the live wire and the zero wire of the load end of the external power supply main circuit, and the sampling end of the reverse power pre-detection circuit is connected to the live wire and the zero wire of the load end of the external power supply column circuit and the zero wire of the power end of the external power supply main circuit; the output end of the overload, short circuit and electric leakage detection circuit, the output end of the reverse work pre-detection circuit and the output end of the over-voltage and under-voltage detection circuit are connected to the fault signal processing circuit; the output end of the fault signal processing circuit is respectively connected to the fault-free automatic reclosing circuit and the driving control circuit, the output end of the fault-free automatic reclosing circuit is connected to the driving control circuit, and the output end of the driving control circuit is connected to an executing component for controlling the on-off of an external power supply main circuit.
In the above technology and scheme, the fault-free automatic reclosing circuit comprises a resistor R 2 Adjustable resistor W 1 Silicon controlled rectifier T 1 Integrated circuit IC 3 、IC 4 Relay J 1 、J 2 Light emitting diode FD 1 And buzzer Y, IC 3 1 st pin is connected to fault signal processing circuit IC 7 11 th pin, IC 3 An adjustable resistor W is connected between the 2 nd pin and the 3 rd pin 1 ，IC 3 5 th pin through flash alarming diode FD 1 Connected to the negative end (ground) of the DC power supply, a first relay J 1 Across an IC 3 Between the 6 th and 7 th feet, the 7 th foot is also connected to J 1 Is a normally open contact J of (1) 1-1 ，IC 3 The 8 th pin is connected to J 1 Center contact of (C), IC 3 Pin 4 is grounded, IC 4 The 10 th pin is connected to the IC in the drive control circuit 8 5 th foot, IC 4 Pin 9 is connected to IC in the reverse power pre-detection circuit 5 Pin 7, IC 4 The 8 th pin and the 7 th pin are respectively connected with R in an overload, short circuit and electric leakage detection circuit 3 And R is 4 R is one end of 3 And R is 4 The other end of (a) is respectively connected to triode V 1 And V 2 Base electrode of triode V 1 And V 2 The collector electrodes of (a) are respectively connected with a relay J 3 And J 4 Coil, IC of (C) 4 The 6 th pin is connected to the drive control circuit IC 8 3 rd foot, IC 4 5 th pin warp resistor R 2 Is connected to the silicon controlled rectifier T 1 Control electrode T of (2) 1 Control of the 2 nd relay J 2 On/off of J 2 Is a group of normally-closed contacts J 2-1 And control IC 4 Is provided.
In the above technical solution, the fault signal processing circuit includes an integrated circuit IC 7 Fault leakage indicator FD 6 Overload and short-circuit fault indication lamp FD 5 Adjustable resistor W 4 、W 5 ，IC 7 The 1 st input pin is connected to the over-voltage and under-voltage detection circuit IC 6 7 th output pin of (d), indicator lamp FD 6 And FD (color filter) 5 Respectively connected across the positive end of the working power supply and the IC 7 Zero sequence current transformer BL between 3 rd and 4 th pins 1 Is of the secondary winding BL 1－2 Across an IC 7 Between the 5 th input pin and the negative end of the working power supply, the current transformer BL 2 Is of the secondary winding BL 2－2 Across an IC 7 An adjustable resistor W between the 6 th input pin and the negative end of the working power supply 5 Across an IC 7 An adjustable resistor W between the 8 th pin and the negative end of the working power supply 4 Across an IC 7 Between the 9 th pin and the negative end of the working power supply, IC 7 Is connected with the 10 th input pin of the third relay through the normally open contact J of the third relay 3－1 Fire wire L' connected to load end of external power supply main circuit, IC 7 11 th output pin is connected to the drive control circuit IC 8 The 6 th input pin, the third triode V 3 Connected in series to the positive terminal of the power supply and the IC 7 Between the 13 th leg, V 3 Is passed through resistor R 5 To IC 4 And 7 th leg.
In the above technical scheme, the over-voltage and under-voltage detection circuit comprises an integrated circuit IC 6 Under-voltage fault indication lamp FD 2 Overvoltage fault indication lamp FD 3 Adjustable resistor W 2 、W 3 Indicator light FD 2 Across an IC 6 Between the 1 st pin and the positive end of the power supply, FD 3 Across an IC 6 An adjustable resistor W between the 6 th pin and the positive end of the power supply 2 、W 3 Respectively cross-over the IC 6 Between the 2 nd and 3 rd pins and the negative end of the power supply.
In the above technical scheme, the overload, short-circuit and leakage detection circuit comprises a resistor R 1 、R 3 、R 4 、R 5 Triode V 1 、V 2 、V 3 Relay J 3 、J 4 Zero sequence current transformer BL 1 And current mutual inductance BL 2 ；J 3 And J 4 Is connected in parallel with the positive end of the power supply, J 4 Through triode V at the other end 2 Resistance R 4 To IC 4 8 th foot, J 3 Through triode V at the other end 1 Resistance R 3 To IC 4 7 th foot, BL 1 Primary winding BL of (a) 1－1 Is connected to the live wire L', BL of the load end of the external power supply main circuit 1-1 The other end is connected with the resistor R 1 、J 4 Is a group of normally open contacts J 4－1 Connected to the upper end of the secondary output end of the power transformer B, BL 1 Is of the secondary winding BL 1－2 Across an IC 7 Between the 5 th input pin and the negative end of the working power supply, the live wire L 'and the zero wire N' of the load end of the external power supply main circuit simultaneously pass through BL 1 ，BL 2 Secondary BL of (2) 2-2 Across an IC 7 Between the 6 th input pin and the negative end of the working power supply, the live wire L' of the load end of the external power supply main circuit passes through BL 2 Third relay J 3 Is a group of normally open contacts J 3-1 Across an IC 7 Between the 10 th pin and the load end fire wire L' of the external power supply main circuit, J 3 Another set of contacts J of (1) 3-2 And the power supply circuit is connected between the load end zero line N' of the external power supply main circuit and the negative end of the working power supply in a bridging way.
In the above technical scheme, the inverse power pre-detection circuit is formed by an integrated circuit IC 5 And reverse power fault indication lamp FD 4 Structure, IC 5 The 1 st and 2 nd input pins are connected to the live wire L 'and the zero wire N' of the load end of the external power supply main circuit respectively, and the IC 5 3 rd pin is connected to zero line N, IC of power supply end of main circuit 5 The 5 th output pin is connected to the fault signal processing circuit IC 7 Input pin 2, reverse power fault indicator FD 4 Across an IC 5 Between the 6 th foot and the negative end of the working power supply, TC 5 No. 7 pin is connected to the fault-free automatic reclosing circuit IC 4 And a 9 th leg.
In the above technical solution, the driving control circuit includes an IC 8 ，IC 8 The 3 rd input pin is connected to the fault-free automatic reclosing power supplyRoad IC 4 6 th output pin, IC 8 The 5 th and 6 th input pins are respectively connected to the IC 4 10 th output pin and fault signal processing circuit IC 7 11 th output pin, IC 8 The 2 nd, 7 th and 1 st output pins are connected to the executing components for controlling the on-off of the external power supply main circuit.
In the technical scheme, the executive component adopts a magnetic latching relay or an electromagnetic relay or an alternating current contactor.
In the above technical solution, the integrated circuit IC 1 、IC 2 、IC 4 IC, which is a prior art integrated circuit 1 Model 78L12, IC 2 Model 78L05, IC 4 Model PLC16F505; IC (integrated circuit) 3 、IC 5 、IC 6 、IC 7 、IC 8 The specific structure of the chip developed for the invention is as follows:
IC 3 : namely, the automatic reclosing chip developed by the invention, the model DQ001 of the enterprise, and the automatic reclosing chip is used for connecting the resistor R 6 To R 10 Capacitance C 5 To C 8 Diode D 5 Triode V 4 Silicon controlled rectifier T 2 And 555 circuits are integrated in one chip; chip 1 st foot passes through diode D 5 Resistance R 6 Connected with a silicon controlled rectifier T 2 Control electrode, silicon controlled rectifier T 2 Anode is connected with 8 th pin of chip, namely positive end of working power supply, and silicon controlled rectifier T 2 Cathode connection 555 circuit 4, 8 pins, chip 2, 7 pins and R 7 Upper end, silicon controlled rectifier T 2 The control electrode and the cathode are also connected across a capacitor C 5 The 2 nd pin of the chip is also connected with the 4 th pin and the 8 th pin of the 555 circuit at the same time, and the 6 th pin and the 7 th pin of the 555 circuit are connected with the 3 rd pin of the chip and pass through the capacitor C 6 Connect the 4 th pin of the chip, the 1 st pin of 555 circuit and triode V 1 The emitter is also connected with the 4 th pin of the chip, and the 5 th pin of the 555 circuit passes through the capacitor C 7 The 4 th pin of the connecting chip and the 2 nd pin of the 555 circuit pass through a parallel resistor R 8 Capacitance C 8 The 4 th pin of the rear connection chip and the 2 nd pin of the 555 circuit are also connected through a resistor R 7 The 7 th pin of the chip is connected, the 7 th pin of the chip is connected with the 4 th pin and the 8 th pin of the 555 circuit and the 2 nd pin of the chip, and the 3 rd pin of the 555 circuit passes through a resistor R 9 Connecting tripolarTube V 4 Base, triode V 4 The collector is connected with the 6 th pin of the chip, and the 7 th pin of the chip is also connected with the resistor R 10 Connect the 5 th pin of the chip, the 8 th pin and the 4 th pin of the chip are respectively connected with the positive end V of the working power supply DD And the negative end V of the working power supply SS 。
IC 5 : the single-phase alternating current reverse power fault pre-detection protection chip is enterprise model DQ002, integrates three full-wave rectifying circuits, a photoelectric coupling circuit and a control circuit into a chip, wherein the input ends of the three full-wave rectifying circuits are respectively connected with pins 1, 2 and 3 of the chip, the output ends of the three full-wave rectifying circuits are connected in parallel and then are connected with the input ends of the photoelectric coupling circuits, the output ends of the photoelectric coupling circuits are connected with the control circuit, and the control circuit is connected with pins 4, 5, 6, 7 and 8 of the chip; the three full-wave rectifying circuits are composed of diodes D 6 To D 11 The photoelectric coupling circuit is composed of luminous tube FD 7 And a phototransistor V 5 Is composed of a control circuit consisting of resistor R 13 To R 17 Diode D 12 To D 13 Silicon controlled rectifier T 3 And triode V 6 The three input ends of the three full-wave rectifying circuits are respectively connected with the 1 st, 2 nd and 3 rd pins of the chip, the 1 st, 2 nd and 3 rd pins of the chip are respectively connected with the live wire L ', the zero wire N' and the power source end zero wire N of the load end, and the output ends of the three full-wave rectifying circuits are connected in parallel and then are connected to the input end photoelectric tube FD of the photoelectric coupling circuit 7 Positive and negative electrodes, photo transistor V of photoelectric coupling circuit 5 The output end is connected in series with the silicon controlled rectifier T of the control circuit 3 Cathode and diode D 12 Between the positive ends, a silicon controlled rectifier T 3 Electrode warp resistor R 15 Is connected to the 7 th pin of the chip, the silicon controlled rectifier T 3 Is connected to the 5 th pin of the chip and is connected with the anode of the resistor R 16 Connected to triode V 6 Base, triode V 6 Collector via diode D 13 And resistance R 17 The positive terminal V of the DC working power supply is connected to the 6 th pin of the chip DD The negative terminal V of the DC working power supply is connected to the 8 th pin of the chip SS Is connected to the 4 th pin of the chip.
IC 6 : namely the inventionThe developed overvoltage and undervoltage detection chip is of enterprise model DQ003 and is used for detecting the resistor R 18 To R 23 Two voltage detectors U 2 、U 3 A NOT gate U 4 An AND gate U 5 Integrated in one chip; the voltage detector U 2 The input end is connected with two paths: one path is connected with the 2 nd pin of the chip, and the other path is connected with the 2 nd pin of the chip through a resistor R 19 Is connected with the 8 th pin of the chip; voltage detector U 2 The output end is connected with three paths: first path and AND gate U 5 One input end is connected with the second path through a resistor R 20 Is connected with the 1 st pin of the chip, and the third path is connected with the third path through a resistor R 21 Is connected with the 8 th pin of the chip; the voltage detector U 3 The input end is connected with two paths: one path is connected with the 3 rd pin of the chip, and the other path is connected with the 3 rd pin of the chip through a resistor R 18 Is connected with the 8 th pin of the chip; voltage detector U 3 The output end is connected with two paths: one-way AND NOT gate U 4 The other path is connected with the input end of the resistor R 22 Is connected with the 8 th pin of the chip; voltage detector U 2 、U 3 The negative end of the power supply is connected with the 4 th pin of the chip, and the NOT gate U 4 The output end of (2) is connected with two paths: one-way sum AND gate U 5 Another input terminal of the resistor R is connected with another circuit 23 Is connected with the 6 th pin of the chip; AND gate U 5 The output end of the chip is connected with the 7 th pin of the chip.
IC 7 : namely, the fault signal processing circuit chip developed by the invention is of the enterprise model DQ004, and the fault signal processing circuit chip is provided with a resistor R 24 To R 36 Capacitance C 9 To C 13 Diode D 14 To D 23 Silicon controlled rectifier T 4 To T 6 Four-input NAND gate U 6 Integrated on a chip; wherein the 1 st pin and the 2 nd pin of the chip are respectively connected with the four-input NAND gate U 6 1 st input terminal and 2 nd input terminal; chip 3 rd pin through resistor R 24 Diode D 14 Connected with a silicon controlled rectifier T 4 Anode, chip 4 th pin passes through resistor R 25 Diode D 15 Connected with a silicon controlled rectifier T 5 Anode, chip 5 th pin passes through diode D 16 Connected with a silicon controlled rectifier T 4 Control electrode, chip 6 th pinThrough diode D 22 Resistance R 35 Connected with a silicon controlled rectifier T 5 Control electrode, 8 th pin of chip is connected with silicon controlled rectifier T 5 The 9 th pin of the control electrode is connected with the silicon controlled rectifier T 6 Control electrode, 10 th pin of chip passes through resistor R 34 、R 33 Connected with a silicon controlled rectifier T 6 The control electrode and at the same time, the 10 th pin of the chip passes through the resistor R 34 、R 32 、R 31 Connected with a silicon controlled rectifier T 6 Anode, 11 th pin of chip is connected with four-input NAND gate U 6 The 5 th pin of the output end of the chip and the 13 th pin of the chip pass through a resistor R 31 Connected with a silicon controlled rectifier T 6 Anode, 7 th and 14 th pins of the chip are respectively connected with negative and positive ends of the working power supply, and the silicon controlled rectifier T 4 Anode through diode D 18 Connect four-input NAND gate U 6 3 rd input terminal of (C) silicon controlled rectifier T 5 Anode through diode D 19 Connect four-input NAND gate U 6 The 4 th input terminal of the (C) 6 The anode also passes through a diode D 21 Resistance R 29 Connected with a silicon controlled rectifier T 5 And a control electrode.
IC 8 : namely, the driving control circuit chip developed by the invention, the model DQ005 of enterprises, the driving control circuit chip is used for driving the resistor R 37 To R 42 Diode D 24 To D 28 Voltage stabilizing diode DW 1 To DW 2 Triode V 7 To V 11 Silicon controlled rectifier T 7 Integrated in one chip; wherein triode V 7 Collector and triode V 9 Collector is connected with triode V 8 Collector and triode V 10 Collector is connected with triode V 7 Emitter and triode V 8 Positive end V of 8 th pin working power supply of emitter connecting chip DD Triode V 9 Emitter and triode V 11 Negative terminal V of 4 th pin working power supply of emitter connection chip SS The method comprises the steps of carrying out a first treatment on the surface of the Triode V 7 、V 9 One path of collector electrode is connected with the 2 nd pin of the chip, and the other path of collector electrode passes through a resistor R 40 Voltage stabilizing diode DW 2 Connecting triode V 8 A base; triode V 8 、V 11 One path of collector is connected with the 7 th pin of the chip, and the other path of collector passes through the voltage-stabilizing diode DW 1 Resistance R 39 Connecting triode V 7 A base; the 3 rd leg of the chip passes through diode D 26 Resistance R 38 Connecting triode V 9 Base, another path through resistor R 37 Diode D 25 Connected with a silicon controlled rectifier T 7 Control electrode and triode V 10 Collector, silicon controlled rectifier T 7 Anode connection chip 8 th pin, silicon controlled rectifier T 7 Cathode pass diode D 24 1 st pin of connecting chip, triode V 10 Base pass resistance R 42 Diode D 28 5 th pin of connecting chip, triode V 11 Base pass resistance R 41 Diode D 27 Connect the 6 th pin of the chip, diode D 27 、D 28 Is connected with the negative terminal of the battery.
Advantages and effects
The invention has small volume, can be conveniently installed in high and middle-grade electrical equipment, and even can be installed in a power socket, so that various high and middle-grade electrical equipment and power sockets have the functions of reverse power pre-detection protection, over-voltage and under-voltage pre-detection protection, on-line detection protection, overload, short-circuit pre-detection protection, on-line detection protection, electric leakage pre-detection protection, on-line detection protection, fault-free automatic reclosing and the like.
Drawings
FIG. 1 is a block diagram of the electrical principle of the present invention;
FIG. 2 is an overall assembly view of the present invention;
FIG. 3 is an electrical schematic of the present invention;
FIG. 4 shows an IC of the present invention 3 An internal electrical schematic diagram of the reclosing chip;
FIG. 5 shows an IC of the present invention 5 An internal electrical schematic diagram of a single-phase alternating current reverse power fault pre-detection protection chip;
FIG. 6 shows an IC of the present invention 6 An internal electrical schematic diagram of the overvoltage and undervoltage detection chip;
FIG. 7 shows an IC of the present invention 7 An internal electrical schematic diagram of the fault signal processing circuit chip;
FIG. 8 shows an IC of the present invention 8 An internal electrical schematic diagram of the drive control circuit chip.
The types of integrated circuits and chips used in the figures are:
IC 1 :78L12； IC 2 :78L05； IC 3 :DQ001； IC 4 :PIC16F505；
IC 5 :DQ002； IC 6 :DQ003； IC 7 :DQ004； IC 8 :DQ005。
the specific embodiment is as follows:
the invention will be further described with reference to the accompanying drawings, in which:
referring to fig. 1, the input end of the power supply circuit is connected to the power supply end of the main circuit, the output ends of the power supply circuit are connected to the fault-free automatic reclosing circuit, the driving control circuit and the fault signal processing circuit, the over-voltage and under-voltage detection circuit, the reverse power pre-detection circuit, the overload, short-circuit and leakage detection circuit are connected to the load end of the main circuit, the sampling end of the reverse power pre-detection circuit is connected to the live wire, the zero wire and the zero wire of the power supply end of the main circuit, the overload and short-circuit leakage detection circuit is connected to the reverse power pre-detection circuit, the output ends of the over-voltage and under-voltage detection circuit are connected to the fault signal processing circuit, the output ends of the fault signal processing circuit are connected to the fault-free automatic reclosing circuit and the driving control circuit respectively, the output end of the fault-free automatic reclosing circuit is connected to the driving control circuit, and the output end of the driving control circuit is connected to an executing device for controlling the on-off of the main circuit, and the executing device can be a magnetic latching relay or an alternating current contactor.
Referring to FIG. 2, the invention is characterized in that before the load end of the main circuit is connected with the power end, various electrical faults existing in the main circuit are pre-checked and protected, after the load end of the main circuit is connected with the power end, various electrical faults occurring in the main circuit are online checked and protected, not only the pre-checked and protected can lock the main circuit in an off state, but also the online protection can cut off the main circuit, after the faults are removed, the main circuit can be automatically reclosed, and the sound and light alarm and the fault content notification can be given when the main circuit is locked or cut offAn ac single-phase intelligent module of (a). The intelligent electronic control device mainly comprises a plastic box, an intelligent electronic control board, a mutual inductor and epoxy resin glue. It is characterized in that: an intelligent electric control board 2 is arranged in the plastic box 1, a power supply circuit, a fault-free automatic reclosing circuit, a fault signal processing circuit, an overload, short circuit and electric leakage detection circuit, a reverse power pre-detection circuit, an overvoltage and undervoltage detection circuit and a driving control circuit are arranged on the intelligent electric control board 2; the live wire and the zero line of the main circuit power supply end are connected into the intelligent electric control board 2 through the plug-in 8 and the connecting wire thereof, and the live wire and the zero line of the load end are connected into the intelligent electric control board 2 through the plug-in 7 and the connecting wire thereof, and the zero sequence current transformer BL 1 The intelligent electric control board 2 and the current transformer BL are connected through the plug-in 6 and the connecting wire thereof 2 The intelligent electric control board 2 is connected with the plug-in unit 5 and the connecting wire thereof, the executive device (magnetic latching relay or electromagnetic relay or alternating current contactor) for controlling the on-off of the main circuit is connected with the intelligent electric control board 2 through the plug-in unit 4 and the connecting wire thereof, the live wire and the zero wire of the controlled main circuit simultaneously pass through the zero sequence current transformer, the live wire passes through the current transformer, the plastic box 1 and the intelligent electric control board 2 are sealed and poured into a module by epoxy resin glue, and the light emitting diode FD on the electric control board 2 1 To FD 6 The top of the buzzer Y and the sounding surface of the buzzer Y are protruded on the surface of the epoxy resin adhesive.
Referring to fig. 3, the circuit composition of the embodiment of the present invention is:
the power supply circuit consists of a transformer B and a rectifier diode D 1 -D 4 Capacitance C 1 、C 2 、C 3 、C 4 Three-terminal voltage stabilizing IC 1 、IC 2 The fault-free automatic reclosing circuit is composed of a resistor R 2 Adjustable resistor W 1 Flash diode FD 1 Silicon controlled rectifier T 1 Buzzer Y and integrated circuit IC 3 、IC 4 Relay J 1 、J 2 Constructing; fault signal processing circuit is by adjustable resistance W 4 、W 5 Leakage fault indication lamp FD 6 Overload and short-circuit fault indication lamp FD 5 Integrated circuit IC 7 Constructing; over-voltage and under-voltage detection circuit route adjustable resistor W 2 、W 3 Under-voltage fault indication lamp FD 2 Overvoltage fault indicator FD 3 Integrated circuit IC 6 Constructing; reverse power pre-detection circuit route reverse power fault indication lamp FD 4 Integrated circuit IC 5 Constructing; overload, short circuit and leakage detection circuit route resistor R 1 、R 3 、R 4 、R 5 Relay J 3 、J 4 Triode V 1 、V 2 、V 3 Zero sequence current transformer BL 1 And a current transformer BL 2 The composition is formed.
When the invention is connected with the power end of the main circuit, the power circuit is electrified to work, and provides a direct current working power supply for the invention, if the power end of the main circuit has no overvoltage or undervoltage faults, the overvoltage or undervoltage detection circuit IC is used for detecting the overvoltage or undervoltage faults 6 The 7 th output pin is high level, before the reverse power pre-detection circuit and overload, short circuit and leakage detection circuit do not work according to program, the fault signal processing circuit IC 7 The 11 th output pin is low level, and IC in the fault-free automatic reclosing circuit 3 1 st input pin is low level, 1 st relay J 1 In a power-off release state J 1 Normally closed contact J of (2) 1－1 Closed, integrated circuit IC 4 Power-on reset begins to work according to program, IC 4 Pin 10 is changed from low level to high level and kept for a period of time, and the driving control circuit IC 8 The 5 th input pin is also changed from low level to high level and is kept for a period of time, and the IC 8 The 1 st output pin is kept in the no-voltage output state, if the executive device for controlling the on-off of the main circuit is an electromagnetic relay or an alternating current contactor, the electromagnetic relay or the alternating current contactor is kept in the off state, and the IC 8 A negative pulse voltage is output between the 7 th output pin and the 2 nd output pin, the pulse voltage has a width equal to IC 8 The high level of the 5 th input pin can fully meet the requirement of the magnetic latching relay for switching the working state, if the actuating device for controlling the on-off of the main circuit is the magnetic latching relay, when the magnetic latching relay is in the off state (normal condition) before the magnetic latching relay, the negative pulse voltage can keep the magnetic latching relay in the off state, and when the magnetic latching relay is in the on state (abnormal condition) before the magnetic latching relay, the negative pulse voltage can switch the magnetic latching relay from the on state to the off stateIs in an off state; whether the executive device for controlling the on-off of the main circuit is a magnetic latching relay or an electromagnetic relay or an alternating current contactor, the invention can ensure that the power end and the load end of the main circuit are in an off state when the fault pre-detection is carried out, thereby avoiding false alarm of the fault pre-detection; IC (integrated circuit) 4 Continuing to program IC 4 The 10 th pin returns to low level, the 9 th output pin changes from low level to high level and keeps for a period of time, and the inverse power pre-checking circuit IC 5 The 7 th level is changed from low level to high level, and the reverse power fault pre-detection is started to the main circuit load end, if the main circuit load end has no reverse power fault, the IC 5 The 5 th output pin keeps high level and IC 7 、IC 3 、IC 8 Continuously maintaining the original working state; IC (integrated circuit) 4 Continuing to program IC 4 The 9 th foot returns to low level, the invention completes the task of the reverse work pre-examination, IC 4 The 8 th output pin is changed from low level to high level and kept at high level for a period of time, the second triode V 2 Conduction, J 4 Electrifying and sucking, J 4 Is a group of normally open contacts J 4-1 Closing, and starting to perform leakage fault pre-detection on the main circuit load end, wherein if the main circuit load end has no leakage fault, the fault signal processing circuit IC 7 5 th input pin voltage<1V、IC 7 、IC 3 、IC 8 Continuously kept in the original working state, IC 4 Continuing to program IC 4 Pin 8 goes back to low level, V 2 Cut-off, J 4 Releasing the power failure, and completing the task of pre-checking the leakage fault of the load end of the main circuit; IC (integrated circuit) 4 Continuing to program IC 4 The 7 th pin is changed from low level to high level and is kept for a period of time, the first triode V 1 And a third triode V 3 Conduction, third relay J 3 Energizing and sucking IC 7 The 13 th pin is connected with the positive end of the power supply, J 3 Is provided with two groups of normally open contacts J 3-1 、J 3-2 Closing, starting overload and short-circuit fault pre-detection on the load end of the main circuit, if the load end of the main circuit does not have overload and short-circuit fault, the fault signal processing circuit IC 7 The 10 th input pin voltage will continue to remain >1V state, IC 7 、IC 8 、IC 3 Continuously maintaining the original working state, and IC 4 Continuing to program IC 4 Pin 7 goes back to low level, V 1 、V 3 Cut-off, J 3 Power-off release, IC 7 The 13 th pin is disconnected with the power supply end, so that the task of pre-detecting overload and short-circuit faults of the load end of the main circuit is completed; IC (integrated circuit) 4 Continuing to program IC 4 The 6 th output pin is changed from low level to high level and kept for a period of time, and the control circuit IC is driven 8 The 3 rd input pin is also changed from low to high and held for a period of time, IC 8 A positive pulse voltage output is arranged between the 7 th pin and the 2 nd pin, and if an executive device for controlling the on-off of the main circuit is a magnetic latching relay, the positive pulse voltage can enable the magnetic latching relay to be switched from an off state to a closed state, and a power end and a load end of the main circuit are connected. IC (integrated circuit) 8 When the 1 st pin is changed from low level to high level, if the executive device for controlling the on-off of the main circuit is an electromagnetic relay or an alternating current contactor, then the electromagnetic relay or the alternating current contactor is electrified and attracted, and the normally open contact point thereof is used for connecting the power end and the load end of the main circuit, and the IC 4 Continuing to program IC 4 The 6 th pin returns to the low level, the 5 th pin changes from the low level to the high level, and the silicon controlled rectifier T 1 Conduction, J 2 Electrifying and sucking, J 2 Normally closed contact J of (2) 2-1 Breaking and cutting off the integrated circuit IC 4 Relay J 3 、J 4 The invention does not pre-check the main circuit and only performs on-line check after the load end and the power end of the main circuit are connected and run.
Referring to fig. 4-8, the actuator component of the present invention employs a magnetic latching relay or electromagnetic relay or ac contactor.
In the implementation circuit of the invention, the integrated circuit IC 1 、IC 2 、IC 4 IC, which is a prior art integrated circuit 1 Model 78L12, IC 2 Model 78L05, IC 4 Model PLC16F505; IC (integrated circuit) 3 、IC 5 、IC 6 、IC 7 、IC 8 The specific structure of the chip developed for the invention is as follows:
IC 3 : namely, the automatic reclosing chip developed by the invention, the model DQ001 of the enterprise, and the automatic reclosing chip is used for connecting the resistor R 6 To R 10 Capacitance C 5 To C 8 Diode D 5 Triode V 4 Silicon controlled rectifier T 2 And 555 circuits are integrated in one chip; chip 1 st foot passes through diode D 5 Resistance R 6 Connected with a silicon controlled rectifier T 2 Control electrode, silicon controlled rectifier T 2 Anode connection chip 8 th pin, silicon controlled rectifier T 2 Cathode connection 555 circuit 4, 8 pins, chip 2, 7 pins, and R 7 Upper end, silicon controlled rectifier T 2 The control electrode and the cathode are also connected across a capacitor C 5 The 2 nd pin of the chip is also connected with the 4 th pin and the 8 th pin of the 555 circuit at the same time, and the 6 th pin and the 7 th pin of the 555 circuit are connected with the 3 rd pin of the chip and pass through the capacitor C 6 Connect the 4 th pin of the chip, the 1 st pin of 555 circuit and triode V 1 The emitter is also connected with the 4 th pin of the chip, and the 5 th pin of the 555 circuit passes through the capacitor C 7 The 4 th pin of the connecting chip and the 2 nd pin of the 555 circuit pass through a parallel resistor R 8 Capacitance C 8 The 4 th pin of the rear connection chip and the 2 nd pin of the 555 circuit are also connected through a resistor R 7 The 7 th pin of the chip is connected, the 7 th pin of the chip is connected with the 4 th pin and the 8 th pin of the 555 circuit and the 2 nd pin of the chip, and the 3 rd pin of the 555 circuit passes through a resistor R 9 Connecting triode V 4 Base, triode V 4 The collector is connected with the 6 th pin of the chip, and the 7 th pin of the chip is also connected with the resistor R 10 Connect the 5 th pin of the chip, the 8 th pin and the 4 th pin of the chip are respectively connected with the positive end V of the working power supply DD And the negative end V of the working power supply SS 。
IC 5 : the single-phase alternating current reverse power fault pre-detection protection chip is enterprise model DQ002, integrates three full-wave rectifying circuits, a photoelectric coupling circuit and a control circuit into a chip, wherein the input ends of the three full-wave rectifying circuits are respectively connected with pins 1, 2 and 3 of the chip, the output ends of the three full-wave rectifying circuits are connected in parallel and then are connected with the input ends of the photoelectric coupling circuits, the output ends of the photoelectric coupling circuits are connected with the control circuit, and the control circuit is connected with pins 4, 5, 6, 7 and 8 of the chip.
The three are allThe wave rectifying circuit is composed of a diode D 6 To D 11 The photoelectric coupling circuit is composed of luminous tube FD 7 And a phototransistor V 5 Is composed of a control circuit consisting of resistor R 13 To R 17 Diode D 12 To D 13 Silicon controlled rectifier T 3 And triode V 6 The three input ends of the three full-wave rectifying circuits are respectively connected with the 1 st, 2 nd and 3 rd pins of the chip, the 1 st, 2 nd and 3 rd pins of the chip are respectively connected with the live wire L ', the zero wire N' and the power source end zero wire N of the load end, and the output ends of the three full-wave rectifying circuits are connected in parallel and then are connected to the input end photoelectric tube FD of the photoelectric coupling circuit 7 Positive and negative electrodes, photo transistor V of photoelectric coupling circuit 5 The output end is connected in series with the silicon controlled rectifier T of the control circuit 3 Cathode and diode D 12 Between the positive ends, a silicon controlled rectifier T 3 Electrode warp resistor R 15 Is connected to the 7 th pin of the chip, the silicon controlled rectifier T 3 Is connected to the 5 th pin of the chip and is connected with the anode of the resistor R 16 Connected to triode V 6 Base, triode V 6 Collector via diode D 13 And resistance R 17 The positive terminal V of the DC working power supply is connected to the 6 th pin of the chip DD The negative terminal V of the DC working power supply is connected to the 8 th pin of the chip SS Is connected to the 4 th pin of the chip.
IC 6 : namely, the over-voltage and under-voltage detection chip developed by the invention, the model DQ003 of enterprises, the over-voltage and under-voltage detection chip is used for detecting the resistance R 18 To R 23 Two voltage detectors U 2 、U 3 A NOT gate U 4 An AND gate U 5 Integrated in one chip; the voltage detector U 2 The input end is connected with two paths: one path is connected with the 2 nd pin of the chip, and the other path is connected with the 2 nd pin of the chip through a resistor R 19 Is connected with the 8 th pin of the chip; voltage detector U 2 The output end is connected with three paths: first path and AND gate U 5 One input end is connected with the second path through a resistor R 20 Is connected with the 1 st pin of the chip, and the third path is connected with the third path through a resistor R 21 Is connected with the 8 th pin of the chip; the voltage detector U 3 The input end is connected with two paths: one path is connected with the 3 rd pin of the chip, and the other path is connected with the 3 rd pin of the chip through a resistor R 18 Is connected with the 8 th pin of the chip; voltage detector U 3 The output end is connected with two paths: one-way AND NOT gate U 4 The other path is connected with the input end of the resistor R 22 Is connected with the 8 th pin of the chip; voltage detector U 2 、U 3 The negative end of the power supply is connected with the 4 th pin of the chip, and the NOT gate U 4 The output end of (2) is connected with two paths: one-way sum AND gate U 5 Another input terminal of the resistor R is connected with another circuit 23 Is connected with the 6 th pin of the chip; AND gate U 5 The output end of the chip is connected with the 7 th pin of the chip.
IC 7 : namely, the fault signal processing circuit chip developed by the invention is of the enterprise model DQ004, and the fault signal processing circuit chip is provided with a resistor R 24 To R 36 Capacitance C 9 To C 13 Diode D 14 To D 23 Silicon controlled rectifier T 4 To T 6 Four-input NAND gate U 6 Integrated on a chip; wherein the 1 st pin and the 2 nd pin of the chip are respectively connected with the four-input NAND gate U 6 1 st input terminal and 2 nd input terminal; chip 3 rd pin through resistor R 24 Diode D 14 Connected with a silicon controlled rectifier T 4 Anode, chip 4 th pin passes through resistor R 25 Diode D 15 Connected with a silicon controlled rectifier T 5 Anode, chip 5 th pin passes through diode D 16 Connected with a silicon controlled rectifier T 4 Control electrode, chip 6 th pin passes through diode D 22 Resistance R 35 Connected with a silicon controlled rectifier T 5 Control electrode, 8 th pin of chip is connected with silicon controlled rectifier T 5 The 9 th pin of the control electrode is connected with the silicon controlled rectifier T 6 Control electrode, 10 th pin of chip passes through resistor R 34 、R 33 Connected with a silicon controlled rectifier T 6 The control electrode and at the same time, the 10 th pin of the chip passes through the resistor R 34 、R 32 、R 31 Connected with a silicon controlled rectifier T 6 Anode, 11 th pin of chip is connected with four-input NAND gate U 6 The 5 th pin of the output end of the chip and the 13 th pin of the chip pass through a resistor R 31 Connected with a silicon controlled rectifier T 6 Anode, 7 th and 14 th pins of the chip are respectively connected with negative and positive ends of the working power supply, and the silicon controlled rectifier T 4 Anode through diode D 18 Connect four-input NAND gate U 6 3 rd input terminal of (C) silicon controlled rectifier T 5 Anode through diode D 19 Connection fourInput NAND gate U 6 Is controllable T at the 4 th input terminal 6 The anode also passes through a diode D 21 Resistance R 29 Connected with a silicon controlled rectifier T 5 And a control electrode.
IC 8 : namely, the driving control circuit chip developed by the invention, the model DQ005 of enterprises, the driving control circuit chip is used for driving the resistor R 37 To R 42 Diode D 24 To D 28 Voltage stabilizing diode DW 1 To DW 2 Triode V 7 To V 11 Silicon controlled rectifier T 7 Integrated in one chip; wherein triode V 7 Collector and triode V 9 Collector is connected with triode V 8 Collector and triode V 10 Collector is connected with triode V 7 Emitter and triode V 8 Positive end V of 8 th pin working power supply of emitter connecting chip DD Triode V 9 Emitter and triode V 11 Negative terminal V of 4 th pin working power supply of emitter connection chip SS The method comprises the steps of carrying out a first treatment on the surface of the Triode V 7 、V 9 One path of collector electrode is connected with the 2 nd pin of the chip, and the other path of collector electrode passes through a resistor R 40 Voltage stabilizing diode DW 2 Connecting triode V 8 A base; triode V 8 、V 11 One path of collector is connected with the 7 th pin of the chip, and the other path of collector passes through the voltage-stabilizing diode DW 1 Resistance R 39 Connecting triode V 7 A base; the 3 rd leg of the chip passes through diode D 26 Resistance R 38 Connecting triode V 9 Base, another path through resistor R 37 Diode D 25 Connected with a silicon controlled rectifier T 7 Control electrode and triode V 10 Collector, silicon controlled rectifier T 7 Anode connection chip 8 th pin, silicon controlled rectifier T 7 Cathode pass diode D 24 1 st pin of connecting chip, triode V 10 Base pass resistance R 42 Diode D 28 5 th pin of connecting chip, triode V 11 Base pass resistance R 41 Diode D 27 Connect the 6 th pin of the chip, diode D 27 、D 28 Is connected with the negative terminal of the battery.
The specific circuit working principle is as follows:
fault-free automatic reclosing circuit: the working principle is as follows: after the power end of the main circuit is connected, the fault-free automatic reclosing circuit begins to work, such as overvoltage fault or undervoltage fault, reverse power fault, overload, short circuit fault, or leakage fault, and IC exist at the power end or load end of the main circuit 3 The 1 st input pin is changed from low level to high level, and IC 3 Triggering operation, IC 3 Foot 5 goes high and flash alarm diode FD 1 The 7 th leg turns into high level, the buzzer Y sends out alarm sound when being electrified, the 6 th leg turns into low level (only keeps low level for a period of time, the length of time of keeping low level is adjusted by adjusting the adjustable resistor W) 1 To determine), a first relay J 1 Electrifying and sucking, J 1 Is set of contacts J 1-1 Switching, in which normally-closed contacts are opened to cut off the integrated circuit IC 4 、IC 7 Relay J 2 、J 3 、J 4 IC (integrated circuit) operating power supply 4 No opportunity for pin 6 to output high level, IC 8 The 3 rd, 1 st, 2 nd and 7 th pins keep the original state unchanged, the executive device of the main circuit is controlled not to act, and the power end and the load end of the main circuit are continuously locked in the disconnected state. J (J) 1-1 Normally open contacts are closed to complete the IC 3 The 7 th pin and the 8 th pin are short-circuited to trigger the IC next time 3 The operation is ready. IC (integrated circuit) 3 The 6 th pin keeps low level for a period of time and returns to high level, relay J 1 Release after power failure, J 1 Is set of contacts J 1-1 Conversion, J 1-1 Is closed and connected with IC 4 Relay J 2 、J 3 、J 4 The invention repeats the above working process circularly until the main circuit has fault elimination, and the IC is provided with a power supply for the main circuit 4 Can work according to the normal program when the IC 4 Programming to IC 4 When the 6 th pin is changed from low level to high level, the drive control circuit IC 8 Pin 3 also changes from low to high, IC 8 The 7 th pin generates a positive pulse voltage to the 2 nd pin, and the IC 8 1 stThe foot also becomes high level, no matter the executive device for controlling the on-off of the main circuit is magnetic latching relay, or electromagnetic relay or AC contactor, its normally open contact is closed, the power supply end and load end of the main circuit are connected, the IC 4 After the 6 th pin returns to low level, IC 4 5 th foot changes from low level to high level, and the thyristor T 1 Conduction, second relay J 2 Electrifying and sucking, J 2 Normally closed contact J of (2) 2-1 Breaking and cutting off integrated circuit IC 4 Relay J 3 、J 4 The invention does not pre-check the main circuit and only performs on-line check under the condition that the load end of the main circuit is connected with the power end for operation.
The overvoltage and undervoltage detection protection circuit comprises: when the voltage of the power supply end of the main circuit increases, the DC output voltage of the power supply circuit connected with the power supply end of the main circuit increases, and the over-voltage and under-voltage detection circuit IC 6 The voltage of the 3 rd pin also rises, when the voltage of the power end of the main circuit rises to the overvoltage action value, the IC 6 Pin 6 changes from high level to low level, and the overvoltage fault indication lamp FD 3 Power-on luminous IC 6 Pin 7 also changes from high level to low level, and fault signal processing circuit IC 7 The 1 st pin is changed from high level to low level, the 11 th pin output is changed from low level to high level, and the high level is used for driving the control circuit IC 8 The 6 th pin is changed from low level to high level, and the other way is to enable the IC in the fault-free automatic reclosing circuit 3 Pin 1 goes from low to high and IC 8 After the 6 th pin becomes high level, IC 8 A negative pulse voltage output is arranged between the 7 th pin and the 2 nd pin, the 1 st pin output voltage is 0, so that an executing device for controlling the on-off of the main circuit continuously locks the power end and the load end of the main circuit in an off state, and the IC 3 After the 1 st pin becomes high level, IC 3 The 5 th leg goes high, the light emitting diode FD 1 Flash alarm IC 3 The 7 th foot becomes high level, the buzzer Y is electrified to give out alarm sound, and the IC 3 Foot 6 goes low and remains for a period of time during which relay J 1 Electrifying and sucking, J 1 Is set of contacts J 1-1 The state of the transition is changed over,J 1-1 is opened to cut off the IC 4 、IC 7 Relay J 2 、J 3 、J 4 Working power supply of (1), final pre-checking work, J 1-1 Is closed and is prepared for fault-free automatic reclosing. When the voltage of the power supply end of the main circuit decreases, the DC output voltage of the power supply circuit decreases, and the IC 6 The voltage of the 2 nd pin also drops, when the power supply voltage of the main circuit drops to the undervoltage operation value, the IC 6 Foot 1 is changed from high level to low level, and under-voltage fault indication lamp FD 2 Power-on luminous IC 6 Pin 7 goes from high to low and IC 7 The 11 th pin is changed from low level to high level, and one path of the high level enables the drive control circuit IC 8 The 6 th pin is changed from low level to high level, and the other way is to enable the IC in the fault-free automatic reclosing circuit 3 Pin 1 goes from low to high and IC 8 After the 6 th pin becomes high level, IC 8 A negative pulse voltage output is arranged between the 7 th pin and the 2 nd pin, the 1 st pin output voltage is 0, so that an executing device for controlling the on-off of the main circuit continuously locks the power end and the load end of the main circuit in an off state, and the IC 3 After the 1 st pin becomes high level, IC 3 The 5 th leg goes high, the light emitting diode FD 1 Flash alarm IC 3 The 7 th foot becomes high level, the buzzer Y is electrified to give out alarm sound, and the IC 3 Foot 6 goes low and remains for a period of time during which relay J 1 Electrifying and sucking, J 1 Is set of contacts J 1-1 Transition state, J 1-1 Is opened to cut off the IC 4 、IC 7 Relay J 2 、J 3 、J 4 Working power supply of (1), final pre-checking work, J 1-1 Is closed and is prepared for fault-free automatic reclosing.
Reverse power pre-checking circuit, when the power supply circuit is connected with the power supply end of the main circuit, the integrated circuit IC 4 The power-on reset starts to work, and under the condition that the power end of the main circuit has no overvoltage or undervoltage fault, the IC 4 Pin 10 is changed from low level to high level and kept for a period of time, and the driving control circuit IC 8 Pin 5 also changes from low to high, IC 8 Generating a negative pulse voltage between the 7 th and the 2 nd pins, IC 8 Under the normal condition of an executive device for controlling the on-off of the main circuit, when the power end of the main circuit is powered off, the undervoltage protection function cuts off the power end and the load end of the main circuit, and under the normal condition, the IC 8 The generation of a negative pulse voltage between the 7 th and 2 nd pins and the 0 st voltage of the 1 st pin can only keep the main circuit locked in the off state, in order to prevent the load and power terminals from being disconnected in case the power terminal of the main circuit is disconnected, in case the IC 8 The load and power terminals of the main circuit are disconnected to ensure that the load and power terminals of the main circuit are in an off state during the fault pre-detection. To prevent false alarm of the reverse power pre-detection; IC (integrated circuit) 4 The 10 th pin outputs high level and keeps the high level for a period of time and returns to low level, the 9 th pin outputs the low level to be changed into high level and keeps the high level for a period of time, and the high level keeping time is the time for carrying out reverse work pre-detection on the load end of the main circuit, and the reverse work pre-detection circuit IC 5 Pin 7 also goes from low to high and holds for a period of time, IC 5 Triggering operation, if the live wire L 'or the neutral wire N' of the load end of the main circuit is connected with the live wires of other power supply and distribution systems by mistake, alternating voltage exists between the L 'and the N or between the N' and the N, and the IC 5 The 6 th level is changed from low level to high level, and the reverse power fault indication lamp FD 4 Power on brightening IC 5 Pin 5 is changed from high level to low level, and fault signal processing circuit IC 7 Pin 2 also changes from high to low and pin 11 changes from low to high, all the way to the IC 8 The 6 th pin is changed into a high level, the 1 st pin outputs voltage to be 0, and a negative pulse voltage is output between the 7 th pin and the 2 nd pin, so that an executive device for controlling the on-off of the main circuit does not act, and a power end and a load end of the main circuit are continuously locked in an off state; another way to make IC 3 Pin 1 goes from low to high and IC 3 Triggering operation, FD 1 Flashing alarm, alarm sound is given by buzzer Y, J 1 Electrifying and sucking, J 1 Is set of contacts J 1-1 Switching state with its normally closed contact openAnd stopping the pre-detection work, and closing the normally open contact to prepare for fault-free automatic reclosing.
Overload, short circuit and leakage detection circuit: the working principle of the leakage pre-detection protection is as follows: after the invention is connected with the power supply end of the main circuit, if the main circuit has no overvoltage or undervoltage fault, the IC 4 Will be programmed to operate, IC 4 The 10 th pin outputs high level and keeps at low level after a period of time, the 9 th pin outputs high level and keeps at low level after a period of time, during which, if the load end of the main circuit does not have reverse power failure, the 9 th pin returns low level, the 8 th pin outputs high level and keeps at a period of time, the second triode V 2 Conduction, fourth relay J 4 Electrifying and sucking, J 4 Is a normally open contact J of (1) 4-1 Closing, namely connecting a live wire L' and a zero sequence current transformer BL at a load end 1 Primary winding BL of (a) 1-1 The secondary coil of the power supply transformer B is connected, and the safe low-voltage alternating current output by the secondary of the transformer B is changed from the upper end of the secondary of the transformer B to J 4-1 →R 1 →BL 1-1 The lower end of the main circuit power supply end zero line to the secondary B, such as the existence of a grounding resistor and zero sequence current mutual inductance BL at the load end live wire L → the ground 1 Primary BL of (2) 1-1 With current passing through, and with a smaller ground resistance, through BL 1-1 The larger the current of the zero sequence current transformer BL 1 Secondary BL of (2) 1-2 The larger the induced current is, the smaller the ground resistance is, the fault signal processing circuit IC 7 The voltage of the 5 th pin is more than or equal to 1V, and the IC 7 Foot 3 is changed from high level to low level, and the electric leakage fault indication lamp FD 6 Power-on luminous IC 7 The 11 th pin is changed from low level to high level, and the high level goes all the way through IC 8 After working, the executing device for controlling the on-off of the main circuit continuously locks the load end and the power end of the main circuit in an off state, and the other path passes through the IC 3 And after the operation, an audible and visual alarm signal is sent out, meanwhile, the fault pre-detection operation is terminated, preparation is made for fault-free automatic reclosing, and the pre-detection protection task for the leakage fault of the load end is completed. The working principle of the leakage on-line detection protection is as follows: after the main circuit load end and the power end are connected and operated, such as the load endWhen the current leakage fault occurs, the live wire L 'and the zero wire N' at the load end pass through the zero sequence current transformer BL 1 ，BL 1 Secondary BL of (2) 1-2 The induced current will reach the action value, and the fault signal processing circuit IC 7 The 5 th pin is not less than 1V, IC 7 Foot 3 is changed from high level to low level, and the electric leakage fault indication lamp FD 6 Power-on luminous IC 7 The 11 th pin is changed from low level to high level, and the high level goes all the way through the IC 8 After working, the executive device of the control main circuit acts to cut off the load end and the power end of the main circuit, and the other path passes through the IC 3 After working, an audible and visual alarm signal is sent out, and meanwhile, preparation is made for fault-free automatic reclosing; the working principle of overload and short circuit pre-detection protection is as follows: after the invention is connected with the power supply end of the main circuit, if the main circuit has no overvoltage or undervoltage fault, the IC 4 Will be programmed to work, IC 4 The 10 th pin outputs high level and keeps the low level after a period of time, the 9 th pin outputs high level and keeps the low level for a period of time, if the load end of the main circuit does not have reverse power failure, the 9 th pin returns low level, the 8 th pin outputs high level and keeps the low level for a period of time, if the load end of the main circuit does not have leakage failure, the 8 th pin returns low level, the 7 th pin outputs high level and keeps the high level for a period of time, the first triode V 1 Conduction, third relay J 3 Electrifying and sucking, J 3 Is provided with two groups of normally open contacts J 3-1 And J 3-2 Closing, connecting the live wire L' of the load end of the main circuit into a fault signal processing electric IC 7 A 10 th pin for connecting the zero line N' of the load end to the negative end of the DC power supply, and a third triode V 3 Conducting, connecting IC 7 The 13 th pin is connected with the positive end of the power supply, for example, the load end of the main circuit has overload and short-circuit fault, and the fault signal processing circuit IC 7 Will get at the 10 th foot<1V, current is measured by IC 7 Foot 10 → J 3-1 Load-side live wire L' →load-side zero line→J 3-2 Ground (negative terminal of DC working power supply), the more severe the overload, the IC 7 The lower the voltage at pin 10, when the load terminals L 'and N' are shorted. IC (integrated circuit) 7 The 10 th foot pressure is 0, and the adjustable power W is adjusted 4 Can change the pre-detection action of overload and short-circuit fault at the load endValue when IC 7 IC when the 10 th leg is less than or equal to 1V 7 Pin 4 is changed from high level to low level, overload short-circuit fault indication lamp FD 5 Power-on luminous IC 7 The 11 th pin is changed from low level to high level, and the high level goes all the way through the IC 8 After working, the executing device for controlling the on-off of the main circuit continuously locks the load end and the power end of the main circuit in an off state, and the other path passes through the IC 3 And after the operation, an audible and visual alarm signal is sent out, meanwhile, the fault pre-detection operation is terminated, preparation is made for fault-free automatic closing, and the task of pre-detection protection on overload and short-circuit faults of the load end of the main circuit is completed. Working principle of overload and short circuit on-line detection protection: after the load end and the power end of the main circuit are connected and operated, if overload and short-circuit fault occur at the load end of the main circuit, a current transformer BL is arranged on the live wire L' at the load end of the main circuit 2 Secondary BL of (2) 2-2 The induced current of (a) increases to the operation value of overload and short-circuit fault, and the fault signal processing circuit IC 7 The voltage of the 6 th pin is more than or equal to 1V, and the adjustable resistor W is adjusted 5 The resistance value of the circuit can change the action value of the on-line detection of overload and short-circuit fault of the load end of the main circuit, and the IC 7 Pin 4 is changed from high level to low level, overload and short-circuit fault indication lamp FD 5 Power on brightening IC 7 The 11 th pin is changed from low level to high level, and the high level goes all the way through the IC 8 After working, the executive device for controlling the on-off of the main circuit acts to cut off the load end and the power end of the main circuit, and the other path passes through the IC 3 And after working, an audible and visual alarm signal is sent out, and meanwhile, the automatic reclosing valve without faults is prepared.
Fault signal processing circuitry: fault signal processing circuit IC 7 The five signal inputs of the 1 st, 2 nd, 5 th, 6 th and 10 th are used for controlling the 11 th output end simultaneously, in addition, the 5 th input is used for controlling the 3 rd output end, and the 6 th input or the 10 th input is used for controlling the 4 th output end. IC (integrated circuit) 7 Only at the 1 st and 2 nd feet are high level, and at the 5 th and 6 th feet<1V, 10 th foot>When 1V is set at 11 th pin, the signal of any one of the five signal input pins (1, 2, 5, 6, 10) changes state, such as 1 st pin changes from high to low or 2 nd pin changes from low The high level is changed into low level, or the 5 th pin is more than or equal to 1V, or the 6 th pin is more than or equal to 1V, or the 10 th pin is less than or equal to 1V, the 11 th output pin of the IC7 is changed from low level to high level, when the 5 th signal input pin is more than or equal to 1V, the 3 rd output is changed from high level to low level, and when the 5 th input pin is<When 1V, the 3 rd output pin is high level, and when the 6 th input pin is more than or equal to 1V or the 10 th input is less than or equal to 1V, the 4 th output pin is changed from high level to low level. When the 6 th foot<1V, or pin 10 > 1V, pin 4 is high. IC (integrated circuit) 7 8 th pin warp adjustable resistor W 4 Grounding, adjust W 4 The resistance of the circuit breaker can change the action of overload and short-circuit current during on-line detection. IC (integrated circuit) 7 9 th pin warp adjustable resistor W 5 Grounding, adjust W 5 The resistance value of the current sensor can change the action value of overload and short-circuit current during pre-detection.
And a drive control circuit: when driving control circuit IC 8 When the 3 rd input pin is changed from low level to high level, the 1 st output pin has high level output, the high level can drive electromagnetic relay or AC contactor, at the same time, there is a positive voltage output between the 7 th output pin and the 2 nd output pin, the positive voltage can drive magnetic latching relay to switch working state, when IC 8 When the 6 th input pin or the 5 th input pin is changed from low level to high level, the 1 st output pin stops high level output, the working power supply of the electromagnetic relay or the alternating current contactor is cut off, and meanwhile, a negative voltage output is arranged between the 7 th output pin and the 2 nd output pin, and the negative voltage can drive the magnetic latching relay to switch the working state.

Claims (8)

1. An alternating current single-phase intelligent module is characterized in that: the intelligent electric control device comprises a box body, an intelligent electric control board, a mutual inductor and epoxy resin, wherein the intelligent electric control board 2 is arranged in the box body 1, a power supply circuit, a fault-free automatic reclosing circuit, a fault signal processing circuit, an overload, short circuit, a leakage detection circuit, a reverse power pre-detection circuit, an overvoltage and undervoltage detection circuit and a drive control circuit are arranged on the intelligent electric control board 2, a live wire and a zero wire of an external power supply end are connected into the intelligent electric control board 2 through a plug-in 8 and a connecting wire thereof, a live wire and a zero wire of an external load end are connected into the intelligent electric control board 2 through a plug-in 7 and a connecting wire thereof, and a zero sequence current transformer BL of the load end is connected into the intelligent electric control board 2 1 Warp insert 6And a connecting wire of the intelligent electric control board is connected with the intelligent electric control board 2, and a current transformer BL at the load end 2 The intelligent control board 2 is connected with the intelligent control board 2 through the plug-in unit 5 and the connecting wire thereof, the intelligent control board 2 outputs the executive component which is connected with the control external power supply main circuit through the plug-in unit 4 and the connecting wire thereof, the live wire and the zero wire of the control external power supply main circuit simultaneously pass through the zero sequence current transformer, and the live wire passes through the current transformer; finally, sealing and filling the box body 1 and the intelligent electric control board 2 into a module by using the epoxy resin glue 3, wherein the top of the light-emitting diode on the intelligent electric control board and the sounding surface of the buzzer are protruded on the surface of the epoxy resin glue;
The intelligent electric control board comprises a power supply circuit, a fault-free automatic reclosing circuit, a driving control circuit, a fault signal processing circuit, an overload, short circuit, electric leakage detection circuit, a reverse power pre-detection circuit and an over-voltage and under-voltage detection circuit; the input end of the power supply circuit is connected to the power supply end of the external power supply main circuit, and the output end of the power supply circuit is connected to the fault-free automatic reclosing circuit, the driving control circuit, the fault signal processing circuit, the over-voltage and under-voltage detection circuit, the reverse power pre-detection circuit, the overload, short circuit and leakage detection circuit; the sampling end of the overload, short circuit and leakage detection circuit is connected to the live wire and the zero wire of the load end of the external power supply main circuit, and the sampling end of the inverse power pre-detection circuit is connected to the live wire and the zero wire of the load end of the external power supply main circuit and the zero wire of the power end of the external power supply main circuit; the output end of the overload, short circuit and electric leakage detection circuit, the output end of the reverse work pre-detection circuit and the output end of the over-voltage and under-voltage detection circuit are connected to the fault signal processing circuit; the output end of the fault signal processing circuit is respectively connected to a fault-free automatic reclosing circuit and a driving control circuit, the output end of the fault-free automatic reclosing circuit is connected to the driving control circuit, and the output end of the driving control circuit is connected to an executing component for controlling the on-off of an external power supply main circuit;
The over-voltage and under-voltage detection circuit comprises an integrated circuit IC 6 Under-voltage fault indication lamp FD 2 Overvoltage fault indication lamp FD 3 Adjustable resistor W 2 、W 3 Indicator light FD 2 Across an IC 6 Between the 1 st pin and the positive end of the power supply, FD 3 Across an IC 6 6 th pin and power supplyAdjustable resistor W between source positive terminals 2 、W 3 Respectively cross-over the IC 6 Between the 2 nd and 3 rd pins and the negative end of the power supply.
2. The ac single-phase intelligent module according to claim 1, wherein: the fault-free automatic reclosing circuit comprises a resistor R 2 Adjustable resistor W 1 Silicon controlled rectifier T 1 Integrated circuit IC 3 、IC 4 Relay J 1 、J 2 Light emitting diode FD 1 And buzzer Y, IC 3 1 st pin is connected to fault signal processing circuit IC 7 11 th pin, IC 3 An adjustable resistor W is connected between the 2 nd pin and the 3 rd pin 1 ，IC 3 5 th pin through flash alarming diode FD 1 A relay J connected to the negative end of the DC power supply 1 Across an IC 3 Between the 6 th and 7 th feet, the 7 th foot is also connected to J 1 Is a normally open contact J of (1) 1-1 ，IC 3 The 8 th pin is connected to J 1 Center contact of (C), IC 3 Pin 4 is grounded, IC 4 The 10 th pin is connected to the IC in the drive control circuit 8 5 th foot, IC 4 Pin 9 is connected to IC in the reverse power pre-detection circuit 5 Pin 7, IC 4 The 8 th pin and the 7 th pin are respectively connected with R in an overload, short circuit and electric leakage detection circuit 3 And R is 4 R is one end of 3 And R is 4 The other end of (a) is respectively connected to triode V 1 And V 2 Base electrode of triode V 1 And V 2 The collector electrodes of (a) are respectively connected with a relay J 3 And J 4 Coil, IC of (C) 4 The 6 th pin is connected to the drive control circuit IC 8 3 rd foot, IC 4 5 th pin warp resistor R 2 Is connected to the silicon controlled rectifier T 1 Control electrode T of (2) 1 Control of the 2 nd relay J 2 On/off of J 2 Is a group of normally-closed contacts J 2-1 And control IC 4 Is provided.
3. The ac single-phase intelligent module according to claim 1, wherein: the fault signal processing circuit comprises an integrated circuit IC 7 Fault leakage indicator FD 6 Overload and short-circuit fault indication lamp FD 5 Adjustable resistor W 4 、W 5 ，IC 7 The 1 st input pin is connected to the over-voltage and under-voltage detection circuit IC 6 7 th output pin of (d), indicator lamp FD 6 And FD (color filter) 5 Respectively connected across the positive end of the working power supply and the IC 7 Zero sequence current transformer BL between 3 rd and 4 th pins 1 Is of the secondary winding BL 1－2 Across an IC 7 Between the 5 th input pin and the negative end of the working power supply, the current transformer BL 2 Is of the secondary winding BL 2－2 Across an IC 7 An adjustable resistor W between the 6 th input pin and the negative end of the working power supply 5 Across an IC 7 An adjustable resistor W between the 8 th pin and the negative end of the working power supply 4 Across an IC 7 Between the 9 th pin and the negative end of the working power supply, IC 7 Is connected with the 10 th input pin of the third relay through the normally open contact J of the third relay 3－1 Fire wire L' connected to load end of external power supply main circuit, IC 7 11 th output pin is connected to the drive control circuit IC 8 The 6 th input pin, the third triode V 3 Across an IC 7 And the 13 th pin is arranged between the 13 th pin and the positive end of the power supply.
4. The ac single-phase intelligent module according to claim 1, wherein: the overload, short circuit and leakage detection circuit comprises a resistor R 1 、R 3 、R 4 、R 5 Triode V 1 、V 2 、V 3 Relay J 3 、J 4 Zero sequence current transformer BL 1 And a current transformer BL 2 ；J 3 And J 4 Is connected in parallel with the positive end of the power supply, J 4 Through triode V at the other end 2 Resistance R 4 To IC 4 8 th foot, J 3 Through triode V at the other end 1 Resistance R 3 To IC 4 7 th foot, BL 1 Primary winding BL of (a) 1－1 Is connected to the live wire L', BL of the load end of the external power supply main circuit 1-1 The other end is connected with the resistor R 1 、J 4 Is a group of normally open contacts J 4－1 Connected to the upper end of the secondary output end of the power transformer B, BL 1 Is of the secondary winding BL 1－2 Across an IC 7 Between the 5 th input pin and the negative end of the working power supply, the live wire L 'and the zero wire N' of the load end of the external power supply main circuit simultaneously pass through BL 1 ，BL 2 Secondary BL of (2) 2-2 Across an IC 7 Between the 6 th input pin and the negative end of the working power supply, the live wire L' of the load end of the external power supply main circuit passes through BL 2 Relay J 3 Is a group of normally open contacts J 3-1 Across an IC 7 Between the 10 th pin and the load end fire wire L' of the external power supply main circuit, J 3 Another set of contacts J of (1) 3-2 And the power supply circuit is connected between the load end zero line N' of the external power supply main circuit and the negative end of the working power supply in a bridging way.
5. The ac single-phase intelligent module according to claim 1, wherein: the inverse power pre-detection circuit consists of an integrated circuit IC 5 And reverse power fault indication lamp FD 4 Structure, IC 5 The 1 st and 2 nd input pins are connected to the live wire L 'and the zero wire N' of the load end of the external power supply main circuit respectively, and the IC 5 3 rd pin is connected to zero line N, IC of circuit power supply end 5 The 5 th output pin is connected to the fault signal processing circuit IC 7 Input pin 2, reverse power fault indicator FD 4 Across an IC 5 Between the 6 th pin and the negative end of the working power supply, IC 5 No. 7 pin is connected to the fault-free automatic reclosing circuit IC 4 And a 9 th leg.
6. The ac single-phase intelligent module according to claim 1, wherein: the drive control circuit comprises an IC 8 ，IC 8 The 3 rd input pin is connected to the fault-free automatic reclosing circuit IC 4 6 th output pin, IC 8 The 5 th and 6 th input pins are respectively connected to the IC 4 10 th output pin and fault signal processing circuit IC 7 11 th output pin, IC 8 The 2 nd, 7 th and 1 st output pins are connected to the executing components for controlling the on-off of the external power supply main circuit.
7. The ac single-phase intelligent module according to claim 1, wherein: the executive component adopts a magnetic latching relay or an electromagnetic relay or an alternating current contactor.
8. The ac single-phase intelligent module according to claim 1, wherein: integrated circuit IC 3 、IC 5 、IC 6 、IC 7 、IC 8 The specific structure is as follows:
IC 3 : namely an automatic reclosing chip, the model DQ001 of the enterprise, and the automatic reclosing chip is used for connecting the resistor R 6 To R 10 Capacitance C 5 To C 8 Diode D 5 Triode V 4 Silicon controlled rectifier T 2 And 555 circuits are integrated in one chip; chip 1 st foot passes through diode D 5 Resistance R 6 Connected with a silicon controlled rectifier T 2 Control electrode, silicon controlled rectifier T 2 Anode connection chip 8 th pin, silicon controlled rectifier T 2 Cathode connection 555 circuit 4, 8 pins, chip 2, 7 pins and R 2 Upper end, silicon controlled rectifier T 2 The control electrode and the cathode are also connected across a capacitor C 5 The 2 nd pin of the chip is also connected with the 4 th pin and the 8 th pin of the 555 circuit at the same time, and the 6 th pin and the 7 th pin of the 555 circuit are connected with the 3 rd pin of the chip and pass through the capacitor C 6 Connect the 4 th pin of the chip, the 1 st pin of 555 circuit and triode V 1 The emitter is also connected with the 4 th pin of the chip, and the 5 th pin of the 555 circuit passes through the capacitor C 7 The 4 th pin of the connecting chip and the 2 nd pin of the 555 circuit pass through a parallel resistor R 8 Capacitance C 8 The 4 th pin of the rear connection chip and the 2 nd pin of the 555 circuit are also connected through a resistor R 7 The 7 th pin of the chip is connected, the 7 th pin of the chip is connected with the 4 th pin and the 8 th pin of the 555 circuit and the 2 nd pin of the chip, and the 3 rd pin of the 555 circuit passes through a resistor R 9 Connecting triode V 4 Base, triode V 4 The collector is connected with the 6 th pin of the chip, and the 7 th pin of the chip is also connected with the resistor R 10 Connect the 5 th pin of the chip, the 8 th pin and the 4 th pin of the chip are respectively connected with the positive end V of the working power supply DD And the negative end V of the working power supply SS ；
IC 5 : namely, a single-phase alternating current reverse power fault pre-detection protection chip and an enterprise model DQ002, wherein the single-phase alternating current reverse power fault pre-detection protection chip integrates three full-wave rectifying circuits, a photoelectric coupling circuit and a control circuit into a chip, and the three full-wave rectifying circuits are integrated into a whole chipThe input ends of the rectification circuits are respectively connected with pins 1, 2 and 3 of the chip, the output ends of the three full-wave rectification circuits are connected in parallel and then connected to the input ends of the photoelectric coupling circuits, the output ends of the photoelectric coupling circuits are connected with the control circuits, and the control circuits are connected with pins 4, 5, 6, 7 and 8 of the chip; the three full-wave rectifying circuits are composed of diodes D 6 To D 11 The photoelectric coupling circuit is composed of luminous tube FD 7 And a phototransistor V 5 Is composed of a control circuit consisting of resistor R 13 To R 17 Diode D 12 To D 13 Silicon controlled rectifier T 3 And triode V 6 The three input ends of the three full-wave rectifying circuits are respectively connected with the 1 st, 2 nd and 3 rd pins of the chip, the 1 st, 2 nd and 3 rd pins of the chip are respectively connected with the live wire L ', the zero wire N' and the power source end zero wire N of the load end, and the output ends of the three full-wave rectifying circuits are connected in parallel and then are connected to the input end photoelectric tube FD of the photoelectric coupling circuit 7 Positive and negative electrodes, photo transistor V of photoelectric coupling circuit 5 The output end is connected in series with the silicon controlled rectifier T of the control circuit 3 Cathode and diode D 12 Between the positive ends, a silicon controlled rectifier T 3 Electrode warp resistor R 15 Is connected to the 7 th pin of the chip, the silicon controlled rectifier T 3 Is connected to the 5 th pin of the chip and is connected with the anode of the resistor R 16 Connected to triode V 6 Base electrode, triode collector electrode pass through diode D 13 And resistance R 17 The positive terminal V of the DC working power supply is connected to the 6 th pin of the chip DD The negative terminal V of the DC working power supply is connected to the 8 th pin of the chip SS Connect to the 4 th pin of the chip;
IC 6 : namely an overvoltage and undervoltage detection chip, the model DQ003 of the enterprise, and the overvoltage and undervoltage detection chip is used for detecting the resistor R 18 To R 23 Two voltage detectors U 2 、U 3 A NOT gate U 4 An AND gate U 5 Integrated in one chip; the voltage detector U 2 The input end is connected with two paths: one path is connected with the 2 nd pin of the chip, and the other path is connected with the 2 nd pin of the chip through a resistor R 19 Is connected with the 8 th pin of the chip; voltage detector U 2 The output end is connected with three paths: first path and AND gate U 5 One input end is connected with the second path through a resistor R 20 Is connected with the 1 st pin of the chipThird pass resistor R 21 Is connected with the 8 th pin of the chip; the voltage detector U 3 The input end is connected with two paths: one path is connected with the 3 rd pin of the chip, and the other path is connected with the 3 rd pin of the chip through a resistor R 18 Is connected with the 8 th pin of the chip; voltage detector U 3 The output end is connected with two paths: one-way AND NOT gate U 4 The other path is connected with the input end of the resistor R 22 Is connected with the 8 th pin of the chip; voltage detector U 2 、U 3 The negative end of the power supply is connected with the 4 th pin of the chip, and the NOT gate U 4 The output end of (2) is connected with two paths: one-way sum AND gate U 5 Another input terminal of the resistor R is connected with another circuit 23 Is connected with the 6 th pin of the chip; AND gate U 5 The output end of the chip is connected with the 7 th pin of the chip;
IC 7 : namely a fault signal processing circuit chip, the enterprise model DQ004, the fault signal processing circuit chip is provided with a resistor R 24 To R 36 Capacitance C 9 To C 13 Diode D 14 To D 23 Silicon controlled rectifier T 4 To T 6 Four-input NAND gate U 6 Integrated on a chip; wherein the 1 st pin and the 2 nd pin of the chip are respectively connected with the four-input NAND gate U 6 1 st input terminal and 2 nd input terminal; chip 3 rd pin through resistor R 24 Diode D 14 Connected with a silicon controlled rectifier T 4 Anode, chip 4 th pin passes through resistor R 25 Diode D 15 Connected with a silicon controlled rectifier T 5 Anode, chip 5 th pin passes through diode D 16 Connected with a silicon controlled rectifier T 4 Control electrode, chip 6 th pin passes through diode D 22 Resistance R 35 Connected with a silicon controlled rectifier T 5 Control electrode, 8 th pin of chip is connected with silicon controlled rectifier T 5 The 9 th pin of the control electrode is connected with the silicon controlled rectifier T 6 Control electrode, 10 th pin of chip passes through resistor R 34 、R 33 Connected with a silicon controlled rectifier T 6 The control electrode and at the same time, the 10 th pin of the chip passes through the resistor R 34 、R 32 、R 31 Connected with a silicon controlled rectifier T 6 Anode, 11 th pin of chip is connected with four-input NAND gate U 6 The 5 th pin of the output end of the chip and the 13 th pin of the chip pass through a resistor R 31 Connected with a silicon controlled rectifier T 6 Anode, chip 7 th pin and 14 th pin respectivelyConnect the negative and positive ends of the working power supply, the silicon controlled rectifier T 4 Anode through diode D 18 Connect four-input NAND gate U 6 3 rd input terminal of (C) silicon controlled rectifier T 5 Anode through diode D 19 Connect four-input NAND gate U 6 The 4 th input terminal of the (C) 6 The anode also passes through a diode D 21 Resistance R 29 Connected with a silicon controlled rectifier T 5 A control electrode;
IC 8 : namely a drive control circuit chip, the enterprise model DQ005, the drive control circuit chip is used for connecting the resistor R 37 To R 42 Diode D 24 To D 28 Voltage stabilizing diode DW 1 To DW 2 Triode V 7 To V 11 Silicon controlled rectifier T 7 Integrated in one chip; wherein triode V 7 Collector and triode V 9 Collector is connected with triode V 8 Collector and triode V 11 Collector is connected with triode V 7 Emitter and triode V 8 Positive end V of 8 th pin working power supply of emitter connecting chip DD Triode V 9 Emitter and triode V 11 Negative terminal V of 4 th pin working power supply of emitter connection chip SS The method comprises the steps of carrying out a first treatment on the surface of the Triode V 7 、V 9 One path of collector electrode is connected with the 2 nd pin of the chip, and the other path of collector electrode passes through a resistor R 40 Voltage stabilizing diode DW 2 Connecting triode V 8 A base; triode V 8 、V 11 One path of collector is connected with the 7 th pin of the chip, and the other path of collector passes through the voltage-stabilizing diode DW 1 Resistance R 39 Connecting triode V 7 A base; the 3 rd leg of the chip passes through diode D 26 Resistance R 38 Connecting triode V 9 Base, another path through resistor R 37 Diode D 25 Connected with a silicon controlled rectifier T 7 Control electrode and triode V 10 Collector, silicon controlled rectifier T 7 Anode connection chip 8 th pin, silicon controlled rectifier T 7 Cathode pass diode D 24 1 st pin of connecting chip, triode V 10 Base pass resistance R 42 Diode D 28 5 th pin of connecting chip, triode V 11 Base pass resistance R 41 Diode D 27 Connect the 6 th pin of the chip, diode D 27 、D 28 Is connected with the negative terminal of the battery.
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