CN112701796A - Fault indicator power management circuit based on CT energy taking - Google Patents
Fault indicator power management circuit based on CT energy taking Download PDFInfo
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- CN112701796A CN112701796A CN202011519334.1A CN202011519334A CN112701796A CN 112701796 A CN112701796 A CN 112701796A CN 202011519334 A CN202011519334 A CN 202011519334A CN 112701796 A CN112701796 A CN 112701796A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/001—Energy harvesting or scavenging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
- G01R19/1658—AC voltage or recurrent signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/50—Charging of capacitors, supercapacitors, ultra-capacitors or double layer capacitors
Abstract
The invention relates to a CT energy acquisition-based power management circuit of a fault indicator, which comprises a rectifying and filtering module, an overvoltage protection module, a charging control module, a super capacitor energy storage module, a boosting output module and a voltage stabilization output module, the alternating current is set into stable direct current through the rectifying and filtering module, the overvoltage protection module controls the discharge of redundant energy, the charging control module controls the on-off of a charging channel of the super capacitor, the super capacitor energy storage module realizes the high-efficiency energy storage of the super capacitor, the boosting output module pumps the output voltage of the super capacitor to stable high-power output, the voltage stabilizing output module converts the high-power output voltage and the direct current output voltage of the rectifier bridge into stable micro-power output, and the CT energy taking is realized to preferentially supply power to a rear-stage system, and improve super capacitor's charge efficiency, but simultaneously applicable acquisition unit and collection unit fuse and integrative fault indicator.
Description
Technical Field
The invention belongs to the technical field of design of fault indicators, and particularly relates to a CT energy acquisition-based power management circuit of a fault indicator.
Background
With the increasing demand of electric power, electric power systems gradually develop towards high capacity, high voltage and intellectualization, and meanwhile, the requirements of various industries on power supply stability are higher and higher, so that the requirements on the reliability of line operation and the rapidity of line fault elimination are stricter, a fault indicator can be installed without power failure, and meanwhile, the time for line fault location can be greatly shortened, so that the trend of installing the fault indicator on a high-voltage line is reached, but the fault indicator cannot supply power according to a conventional method, and the modes of battery, solar energy, microwave, vibration, electromagnetic induction, light power supply and the like are generally adopted. The mode that the power supply is realized by utilizing the electromagnetic induction principle through the CT is the mode which is most affected by external factors, and the long-term stable power supply for the fault indicator can be realized.
At present, a fault indicator power supply circuit based on CT energy taking mainly comprises a rectifying circuit, an overvoltage protection circuit, an energy storage circuit, a voltage stabilizing circuit and a micro-power output circuit, wherein the output of the secondary side of CT is connected to the alternating current side of the rectifying circuit, the direct current side of the rectifying circuit is connected to an energy storage element through the overvoltage protection circuit, and the energy storage element is connected with the voltage stabilizing circuit in parallel to realize the function of micro-power output.
However, the current fault indicator power supply circuit based on CT energy acquisition has some disadvantages: firstly, a power supply circuit utilizing CT energy acquisition at present must firstly pass through an energy storage process until an energy storage element reaches a certain voltage to realize micro-power output, so that the system is delayed in starting; secondly, when the current of the line is continuously low, the energy obtained through electromagnetic induction is continuously low, the time interval for the energy storage element to supplement the energy is long, and the risk of power failure of a later-stage system can be caused; finally, the current power supply circuit using the CT to obtain energy can only meet the requirement of supplying power to a micropower consumption system, and is limited to this, the fault indicator adopts a form of combining the acquisition unit and the collection unit, and the remote data transmission must rely on the independent collection unit, so the current power supply circuit is not suitable for the fault indicator integrating the acquisition unit and the collection unit.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a fault indicator power supply management circuit based on CT energy taking, which can realize that the CT energy taking can preferentially provide micro-power output, ensure that a rear-stage system is quickly started and the redundant energy is stored again; the purpose that the energy storage element can finish the energy storage process at the highest speed as long as redundant energy exists no matter how large the line current is can be achieved; meanwhile, the power supply can be converted into high-power output, a wider power supply range is provided, and the power supply is suitable for a high-power-consumption fault indicator.
In order to achieve the purpose, the invention provides a fault indicator power management circuit based on CT energy taking, which comprises a rectification filter module, an overvoltage protection module, a charging control module, a super capacitor energy storage module, a boosting output module and a voltage stabilization output module, and is characterized in that:
the rectifier filter module is used for preventing the overvoltage of the CT output side from damaging a circuit and setting the alternating current of the CT output side into stable direct current;
the overvoltage protection module is used for monitoring the direct-current voltage output by the rectifier bridge in real time, and controlling the rectifier bridge to be in short circuit when the voltage value reaches a set protection voltage threshold value, so that the energy release is realized through the short circuit at the CT output side;
the charging control module is used for monitoring the direct-current voltage output by the rectifier bridge in real time, and opening a super capacitor charging channel when the voltage value reaches a set charging voltage threshold value;
the super capacitor energy storage module is used for rapidly storing energy for the super capacitor in a constant-current constant-voltage charging mode;
the boost output module is used for pumping the output voltage of the super capacitor to high-power output and stably outputting the output voltage;
the voltage stabilizing output module is used for converting the high-power output voltage and the rectifier bridge direct-current output voltage into micro-power output and stably outputting the micro-power output;
the output end of the rectification filter module is connected to the voltage stabilizing output module through a first anti-reflection diode D5, the input end of the overvoltage protection module is connected with the output end of the rectification filter module, the output end of the overvoltage protection module is fed back to the rectification filter module, and the output end of the voltage boosting output module is connected to the voltage stabilizing output module through a second anti-reflection diode D6.
Further, the rectifying and filtering module comprises a transient suppression diode VD1, a full-wave rectifier bridge and a first filter capacitor C1, wherein:
the full-wave rectifier bridge comprises a first rectifier diode D1, a second rectifier diode D2, a third rectifier diode D3 and a fourth rectifier diode D4, wherein the third rectifier diode D3 is a body diode of a first switching tube VT1, and the fourth rectifier diode D4 is a body diode of a second switching tube VT 2;
the transient suppression diode VD1 is connected in parallel with the alternating current input side of the full-wave rectifier bridge to prevent the overvoltage at the output side of the CT from damaging the circuit;
and the first filter capacitor C1 is connected in parallel to the DC output side of the full-wave rectifier bridge and is used for stabilizing the DC output voltage of the full-wave rectifier bridge.
Further, the overvoltage protection module includes a first voltage monitoring chip N1, a first switching transistor VT1, a second switching transistor VT2, and a first pull-down resistor R1, wherein:
the first switch tube VT1 and the second switch tube VT2 are NMOS tubes, one end of a first pull-down resistor R1 is connected with the grid electrode of the first switch tube VT1 and the grid electrode of the second switch tube VT2, the other end of the first pull-down resistor R1 is connected with the ground, and the first pull-down resistor R368583 and the second switch tube VT2 are used for providing initial low level for the grid electrode of the first switch tube VT1 and the grid electrode of the second switch tube VT2, so that the VT1 and the VT2 are ensured to be in an off state initially;
the input end of the first voltage monitoring chip N1 is connected with the full-wave rectifier bridge direct current output side, the output end is connected with the grid of the first switch tube VT1 and the grid of the second switch tube VT2, the direct current voltage value of the full-wave rectifier bridge output side is monitored, when the voltage value reaches a set protection voltage threshold value, the output end of the first voltage monitoring chip N1 outputs high level, the first switch tube VT1 and the second switch tube VT2 are controlled to be conducted, the CT output end is enabled to form short circuit, and energy discharge is achieved.
Further, the charging control module includes a second voltage monitoring chip N2, a third switching transistor VT3, a second pull-down resistor R2, a fourth switching transistor VT4, and a first pull-up resistor R3, wherein:
the third switching tube VT3 is an NMOS tube, and the gate thereof is connected to one end of the second pull-down resistor R2, and the other end of the second pull-down resistor R2 is connected to ground, so as to provide an initial low level for the gate of the third switching tube VT3, and ensure that the VT3 is initially in an off state;
the fourth switching tube VT4 is a PMOS tube, a gate of the fourth switching tube VT4 is connected to one end of the pull-up resistor R3, and the other end of the pull-up resistor R3 is connected to a source of the fourth switching tube VT4, so as to provide an initial high level for the gate of the fourth switching tube VT4, and ensure that VT4 is initially in an off state;
the input end of the second voltage monitoring chip N2 is connected with the direct current output side of the full-wave rectifier bridge, the output end of the second voltage monitoring chip N2 is connected with the grid electrode of the third switching tube VT3 and is used for monitoring the direct current voltage value of the output side of the full-wave rectifier bridge, and when the voltage value reaches a set charging voltage threshold value, the output end of the second voltage monitoring chip N2 outputs a high level to control the conduction of the third switching tube VT 3;
the source of the third switching tube VT3 is connected with the gate of the fourth switching tube VT4 through a fourth current limiting resistor R7, the drain of the fourth switching tube VT4 is connected with the anode of the super capacitor E1 through a third anti-reverse diode D7, and when the source and the drain of the third switching tube VT3 are conducted, a low level is provided for the gate of the fourth switching tube VT4, so that the VT4 is in a conducting state, and a super capacitor charging channel is opened.
Further, the super capacitor energy storage module includes a voltage regulator VP1, a fifth switching tube VT5, a sixth switching tube VT6, a first current limiting resistor R4, a second current limiting resistor R5, a third current limiting resistor R6, a fourth current limiting resistor R7, a first voltage dividing resistor R8, a second voltage dividing resistor R9, a third anti-diode D7, and a super capacitor E1, wherein:
the fifth switching tube VT5 is a PNP triode, the E level of the third switching tube is connected with one end of the first current-limiting resistor R4 and the direct current output side of the full-wave rectifier bridge, the B level is connected with the other end of the first current-limiting resistor R4 and the source electrode of the third switching tube VT3, and the C level is connected with the source electrode of the third switching tube VT3 through the fourth current-limiting resistor R7, so that the super capacitor is charged in the initial stage VT5 in a cut-off region, and the purpose of constant current charging is achieved;
one end of the first voltage-dividing resistor R8 is connected with the positive electrode of the super capacitor E1, the other end of the first voltage-dividing resistor R8 is connected with one end of the second voltage-dividing resistor R9, and the other end of the second voltage-dividing resistor R9 is connected with the ground;
the reference end of a voltage regulator tube VP1 is connected with the connection point of a first voltage-dividing resistor R8 and a second voltage-dividing resistor R9, the anode of the voltage regulator tube VP1 is connected with the ground, the cathode of the voltage regulator tube VP1 is connected with the direct current output side of the full-wave rectifier bridge through a second current-limiting resistor R5, and the connection point of the cathode of the voltage regulator tube VP1 and the second current-limiting resistor R5 is connected with the B pole of a sixth switching tube VT6 through a third current-limiting resistor R6;
the sixth switching tube VT6 is a PNP triode, and its C pole is connected to the source of the third switching tube VT3 through the fourth current limiting resistor R7, so that when the charging of the super capacitor reaches the set maximum voltage threshold, the sixth switching tube VT6 starts to work in the conducting region, thereby achieving the purpose of constant voltage charging.
Further, the boost output module includes a second filter capacitor C2, an inductor L1, a boost chip N3, a feedback capacitor C6, a first feedback resistor R10, a second feedback resistor R11, a third filter capacitor C3, and a high-power output VOUT2, wherein:
one end of the second filter capacitor C2 is connected with the input end and the enable end of the boost chip N3, and the other end of the second filter capacitor C2 is connected with the ground, so that the purposes of controlling the N3 to work and stabilizing the input voltage of the N3 are achieved;
one end of the inductor L1 is connected with the input end and the enable end of the boost chip N3, and the other end of the inductor L1 is connected with the switch control end of the boost chip N3, so that the purpose of controlling the switch in the N3 to work is achieved;
one end of a feedback capacitor C6 is connected with one end of a first feedback resistor R10 and the output end of a boosting chip N3, the other end of the feedback capacitor C6 is connected with the other end of the first feedback resistor R10, one end of a second feedback resistor R11 and the feedback end of the boosting chip N3, and the other end of the second feedback resistor R11 is connected with the ground, so that the purpose of stabilizing the output voltage of the boosting chip N3 is achieved;
one end of the third filter capacitor C3 is connected with the output ends of the high-power output VOUT2 and the boost chip N3, and the other end of the third filter capacitor C3 is connected with the ground, so that the purpose of stabilizing the output voltage of the boost output module is achieved.
Further, the voltage regulation output module includes an enable chip N4, a voltage regulation chip N5, a fourth filter capacitor C4, a fifth filter capacitor C5, a delay capacitor C7, a voltage reduction resistor R12, and a micro-power output VOUT1, wherein:
one end of a voltage-reducing resistor R12 is connected with the input end of an enabling chip N4, the other end of a voltage-reducing resistor R12 is connected with the output end of the enabling chip N4 and the input end of a voltage-stabilizing chip N5, the delay control end of the enabling chip N4 is connected with one end of a delay capacitor C7, and the other end of the delay capacitor C7 is connected with the ground, so that the purposes of controlling the N5 to work and preventing repeated restarting are achieved;
the input end of the voltage stabilizing chip N5 is connected with one end of a fourth filter capacitor C4, and the other end of the fourth filter capacitor C4 is connected with the ground, so that the purpose of stabilizing the input voltage of N5 is achieved;
the output end of the voltage stabilizing chip N5 is connected with one end of the micro-power output VOUT1 and one end of the fifth filter capacitor C5, and the other end of the fifth filter capacitor C5 is connected with the ground, so that the purpose of stabilizing the output voltage of the micro-power output module is achieved.
The invention has the following advantages:
1. the direct current passing through the rectifier bridge can preferentially provide energy for micro-power output, the working dead zone of the system is shortened, and the starting time of the system can be shortened.
2. No matter how large the line current is, the energy can be supplemented for the energy storage element with maximum efficiency through the constant-current constant-voltage charging circuit, and the risk of insufficient power supply of a later-stage functional system is greatly reduced.
3. The output of the super capacitor can provide energy for micro-power output, can also provide energy for high-power output through the booster circuit, and can be suitable for a fault indicator with an integrated acquisition unit and a collection unit.
Drawings
Fig. 1 is a block diagram of a power management circuit of a fault indicator based on CT energy acquisition according to the present invention.
Fig. 2 is a circuit diagram of a power management circuit of a fault indicator based on CT energy extraction according to the present invention.
The device comprises a rectifier filter module, a filter module and a power supply module, wherein the rectifier filter module is connected with the power supply module; 2-an overvoltage protection module; 3-a charging control module; 4-a super capacitor energy storage module; 5-a boost output module; 6-voltage stabilization output module.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, a fault indicator power management circuit based on CT energy taking, including rectifier and filter module (1), overvoltage protection module (2), charge control module (3), super capacitor energy storage module (4), boost output module (5), steady voltage output module (6), rectifier and filter module (1), charge control module (3), super capacitor energy storage module (4), boost output module (5), steady voltage output module (6) connect gradually, rectifier and filter module (1) output still is connected to steady voltage output module (6), overvoltage protection module (2) input is connected with rectifier and filter module (1) output, the output of overvoltage protection module (2) feeds back to rectifier and filter module (1).
As shown in fig. 2, the rectifying and filtering module includes a transient suppression diode VD1, a first rectifying diode D1, a second rectifying diode D2, a third rectifying diode D3, a fourth rectifying diode D4 and a first filter capacitor C1; the overvoltage protection module comprises a first voltage monitoring chip N1, a first switch tube VT1, a second switch tube VT2 and a first pull-down resistor R1; the charging control module comprises a second voltage monitoring chip N2, a third switching tube VT3, a second pull-down resistor R2, a fourth switching tube VT4 and a first pull-up resistor R3; the super-capacitor energy storage module comprises a voltage regulator tube VP1, a fifth switch tube VT5, a sixth switch tube VT6, a first current-limiting resistor R4, a second current-limiting resistor R5, a third current-limiting resistor R6, a fourth current-limiting resistor R7, a first divider resistor R8, a second divider resistor R9, a third anti-reflection diode D7 and a super-capacitor E1; the boost output module comprises a second filter capacitor C2, an inductor L1, a boost chip N3, a feedback capacitor C6, a first feedback resistor R10, a second feedback resistor R11, a third filter capacitor C3 and a high-power output VOUT 2; the voltage stabilizing output module comprises an enabling chip N4, a voltage stabilizing chip N5, a fourth filter capacitor C4, a fifth filter capacitor C5, a delay capacitor C7, a voltage reducing resistor R12 and a micro-power output VOUT 1; the output end of the rectifying and filtering module is connected to the voltage-stabilizing output module through a first anti-reverse diode D5; the output end of the boosting output module is connected to the voltage stabilizing output module through a second anti-reflection diode D6.
Further, the first switching tube VT1 is an NMOS tube, the second switching tube VT2 is an NMOS tube, the third switching tube VT3 is an NMOS tube, the fourth switching tube VT4 is a PMOS tube, the fifth switching tube VT5 is a PNP triode, and the sixth switching tube VT6 is a PNP triode; the third rectifying diode D3 is a body diode of the first switching transistor VT1, and the fourth rectifying diode D4 is a body diode of the second switching transistor VT 2.
Furthermore, a full-wave rectifier bridge is formed by the first rectifier diode D1, the second rectifier diode D2, the third rectifier diode D3 and the fourth rectifier diode D4, and the transient suppression diode VD1 is connected in parallel to the alternating current input side of the full-wave rectifier bridge, so that the circuit is prevented from being damaged by overvoltage on the output side of the CT; the first filter capacitor C1 is connected in parallel to the dc output side of the full-wave rectifier bridge for stabilizing the dc output voltage of the full-wave rectifier bridge.
Furthermore, one end of the first pull-down resistor R1 is connected to the gate of the first switching tube VT1 and the gate of the second switching tube VT2, and the other end of the first pull-down resistor R1 is connected to ground, so as to provide an initial low level for the gate of the first switching tube VT1 and the gate of the second switching tube VT2, and ensure that VT1 and VT2 are initially in an off state; the input end of the first voltage monitoring chip N1 is connected with the full-wave rectifier bridge direct current output side, the output end is connected with the grid of the first switch tube VT1 and the grid of the second switch tube VT2, the direct current voltage value of the full-wave rectifier bridge output side is monitored, when the voltage value reaches a set protection voltage threshold value, the output end of the first voltage monitoring chip N1 outputs high level, the first switch tube VT1 and the second switch tube VT2 are controlled to be conducted, the CT output end is enabled to form short circuit, and energy discharge is achieved.
Further, the gate of the third switching tube is connected to one end of the second pull-down resistor R2, and the other end of the second pull-down resistor R2 is connected to ground, so as to provide an initial low level for the gate of the third switching tube VT3, and ensure that the VT3 is initially in an off state; the grid electrode of the fourth switching tube VT4 is connected with one end of a pull-up resistor R3, the other end of the pull-up resistor R3 is connected with the source electrode of the fourth switching tube VT4, and the pull-up resistor R3 is used for providing an initial high level for the grid electrode of the fourth switching tube VT4 and ensuring that the VT4 is initially in a turn-off state; the input end of the second voltage monitoring chip N2 is connected with the direct current output side of the full-wave rectifier bridge, the output end of the second voltage monitoring chip N2 is connected with the grid electrode of the third switching tube VT3 and is used for monitoring the direct current voltage value of the output side of the full-wave rectifier bridge, and when the voltage value reaches a set charging voltage threshold value, the output end of the second voltage monitoring chip N2 outputs a high level to control the conduction of the third switching tube VT 3; the source of the third switching tube VT3 is connected with the gate of the fourth switching tube VT4 through a fourth current limiting resistor R7, the drain of the fourth switching tube VT4 is connected with the anode of the super capacitor E1 through a third anti-reverse diode D7, and when the source and the drain of the third switching tube VT3 are conducted, a low level is provided for the gate of the fourth switching tube VT4, so that the VT4 is in a conducting state, and a super capacitor charging channel is opened.
Furthermore, the E stage of the fifth switching tube VT5 is connected with one end of the first current-limiting resistor R4 and the direct current output side of the full-wave rectifier bridge, the B stage is connected with the other end of the first current-limiting resistor R4 and the source electrode of the third switching tube VT3, and the C stage is connected with the source electrode of the third switching tube VT3 through the fourth current-limiting resistor R7, so that the super-capacitor charging initial stage VT5 works in a cut-off region, and the purpose of constant-current charging is achieved; one end of the first voltage-dividing resistor R8 is connected with the positive electrode of the super capacitor E1, the other end of the first voltage-dividing resistor R8 is connected with one end of the second voltage-dividing resistor R9, and the other end of the second voltage-dividing resistor R9 is connected with the ground; the reference end of a voltage regulator tube VP1 is connected with the connection point of a first voltage-dividing resistor R8 and a second voltage-dividing resistor R9, the anode of the voltage regulator tube VP1 is connected with the ground, the cathode of the voltage regulator tube VP1 is connected with the direct current output side of the full-wave rectifier bridge through a second current-limiting resistor R5, and the connection point of the cathode of the voltage regulator tube VP1 and the second current-limiting resistor R5 is connected with the B pole of a sixth switching tube VT6 through a third current-limiting resistor R6; the C pole of the sixth switching tube VT6 is connected to the source of the third switching tube VT3 through the fourth current limiting resistor R7, so that when the charging of the super capacitor reaches the set maximum voltage threshold, the sixth switching tube VT6 starts to work in the conducting region, thereby achieving the purpose of constant voltage charging.
Furthermore, one end of a second filter capacitor C2 is connected with the input end and the enable end of the boost chip N3, and the other end is connected with the ground, so that the purposes of controlling the N3 to work and stabilizing the input voltage of N3 are achieved; one end of the inductor L1 is connected with the input end and the enable end of the boost chip N3, and the other end of the inductor L1 is connected with the switch control end of the boost chip N3, so that the purpose of controlling the switch in the N3 to work is achieved; one end of a feedback capacitor C6 is connected with one end of a first feedback resistor R10 and the output end of a boosting chip N3, the other end of the feedback capacitor C6 is connected with the other end of the first feedback resistor R10, one end of a second feedback resistor R11 and the feedback end of the boosting chip N3, and the other end of the second feedback resistor R11 is connected with the ground, so that the purpose of stabilizing the output voltage of the boosting chip N3 is achieved; one end of the third filter capacitor C3 is connected with the output ends of the high-power output VOUT2 and the boost chip N3, and the other end of the third filter capacitor C3 is connected with the ground, so that the purpose of stabilizing the output voltage of the boost output module is achieved.
Furthermore, one end of a voltage reduction resistor R12 is connected with the input end of the enable chip N4, the other end of the voltage reduction resistor R12 is connected with the output end of the enable chip N4 and the input end of the voltage stabilization chip N5, the delay control end of the enable chip N4 is connected with one end of a delay capacitor C7, and the other end of the delay capacitor C7 is connected with the ground, so that the purposes of controlling the N5 to work and preventing repeated restarting are achieved; the input end of the voltage stabilizing chip N5 is connected with one end of a fourth filter capacitor C4, and the other end of the fourth filter capacitor C4 is connected with the ground, so that the purpose of stabilizing the input voltage of N5 is achieved; the output end of the voltage stabilizing chip N5 is connected with one end of the micro-power output VOUT1 and one end of the fifth filter capacitor C5, and the other end of the fifth filter capacitor C5 is connected with the ground, so that the purpose of stabilizing the output voltage of the micro-power output module is achieved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. The utility model provides a fault indicator power management circuit based on CT gets energy, includes rectifier and filter module, overvoltage protection module, charging control module, super capacitor energy storage module, the output module that steps up, steady voltage output module, its characterized in that:
the rectifier filter module is used for preventing the overvoltage of the CT output side from damaging a circuit and setting the alternating current of the CT output side into stable direct current;
the overvoltage protection module is used for monitoring the direct-current voltage output by the rectifier bridge in real time, and controlling the rectifier bridge to be in short circuit when the voltage value reaches a set protection voltage threshold value, so that the energy release is realized through the short circuit at the CT output side;
the charging control module is used for monitoring the direct-current voltage output by the rectifier bridge in real time, and opening a super capacitor charging channel when the voltage value reaches a set charging voltage threshold value;
the super capacitor energy storage module is used for rapidly storing energy for the super capacitor in a constant-current constant-voltage charging mode;
the boost output module is used for pumping the output voltage of the super capacitor to high-power output and stably outputting the output voltage;
the voltage stabilizing output module is used for converting the high-power output voltage and the rectifier bridge direct-current output voltage into micro-power output and stably outputting the micro-power output;
the output end of the overvoltage protection module is fed back to the rectification filter module, and the output end of the boost output module is connected to the voltage stabilization output module through a second anti-reverse diode D6.
2. The CT-based power supply fault indicator power management circuit of claim 1, wherein the rectifying and filtering module comprises a transient suppression diode VD1, a full-wave rectifier bridge and a first filter capacitor C1, wherein:
the full-wave rectifier bridge comprises a first rectifier diode D1, a second rectifier diode D2, a third rectifier diode D3 and a fourth rectifier diode D4, wherein the third rectifier diode D3 is a body diode of a first switching tube VT1, and the fourth rectifier diode D4 is a body diode of a second switching tube VT 2;
the transient suppression diode VD1 is connected in parallel with the alternating current input side of the full-wave rectifier bridge to prevent the overvoltage at the output side of the CT from damaging the circuit;
and the first filter capacitor C1 is connected in parallel to the DC output side of the full-wave rectifier bridge and is used for stabilizing the DC output voltage of the full-wave rectifier bridge.
3. The power management circuit of fault indicator based on CT energy extraction as claimed in claim 1, wherein the overvoltage protection module comprises a first voltage monitoring chip N1, a first switch tube VT1, a second switch tube VT2 and a first pull-down resistor R1, wherein:
the first switch tube VT1 and the second switch tube VT2 are NMOS tubes;
one end of the first pull-down resistor R1 is connected with the grid of the first switching tube VT1 and the grid of the second switching tube VT2, the other end of the first pull-down resistor R1 is connected with the ground, and the first pull-down resistor R1 is used for providing an initial low level for the grid of the first switching tube VT1 and the grid of the second switching tube VT2, so that the VT1 and the VT2 are ensured to be in an off state initially;
the input end of the first voltage monitoring chip N1 is connected with the full-wave rectifier bridge direct current output side, the output end is connected with the grid of the first switch tube VT1 and the grid of the second switch tube VT2, the direct current voltage value of the full-wave rectifier bridge output side is monitored, when the voltage value reaches a set protection voltage threshold value, the output end of the first voltage monitoring chip N1 outputs high level, the first switch tube VT1 and the second switch tube VT2 are controlled to be conducted, the CT output end is enabled to form short circuit, and energy discharge is achieved.
4. The power management circuit of the fault indicator based on the CT energy taking function as claimed in claim 1, wherein the charging control module comprises a second voltage monitoring chip N2, a third switching tube VT3, a second pull-down resistor R2, a fourth switching tube VT4 and a first pull-up resistor R3, wherein:
the third switching tube VT3 is an NMOS tube, and the gate thereof is connected to one end of the second pull-down resistor R2, and the other end of the second pull-down resistor R2 is connected to ground, so as to provide an initial low level for the gate of the third switching tube VT3, and ensure that the VT3 is initially in an off state;
the fourth switching tube VT4 is a PMOS tube, a gate of the fourth switching tube VT4 is connected to one end of the pull-up resistor R3, and the other end of the pull-up resistor R3 is connected to a source of the fourth switching tube VT4, so as to provide an initial high level for the gate of the fourth switching tube VT4, and ensure that VT4 is initially in an off state;
the input end of the second voltage monitoring chip N2 is connected with the direct current output side of the full-wave rectifier bridge, the output end of the second voltage monitoring chip N2 is connected with the grid electrode of the third switching tube VT3 and is used for monitoring the direct current voltage value of the output side of the full-wave rectifier bridge, and when the voltage value reaches a set charging voltage threshold value, the output end of the second voltage monitoring chip N2 outputs a high level to control the conduction of the third switching tube VT 3;
the source of the third switching tube VT3 is connected with the gate of the fourth switching tube VT4 through a fourth current limiting resistor R7, the drain of the fourth switching tube VT4 is connected with the anode of the super capacitor E1 through a third anti-reverse diode D7, and when the source and the drain of the third switching tube VT3 are conducted, a low level is provided for the gate of the fourth switching tube VT4, so that the VT4 is in a conducting state, and a super capacitor charging channel is opened.
5. The power management circuit of the fault indicator based on the CT energy extraction, as claimed in claim 1, wherein the super capacitor energy storage module comprises a voltage regulator tube VP1, a fifth switch tube VT5, a sixth switch tube VT6, a first current limiting resistor R4, a second current limiting resistor R5, a third current limiting resistor R6, a fourth current limiting resistor R7, a first voltage dividing resistor R8, a second voltage dividing resistor R9, a third anti-reflection diode D7, and a super capacitor E1, wherein:
the fifth switching tube VT5 is a PNP triode, the E level of the third switching tube is connected with one end of the first current-limiting resistor R4 and the direct current output side of the full-wave rectifier bridge, the B level is connected with the other end of the first current-limiting resistor R4 and the source electrode of the third switching tube VT3, and the C level is connected with the source electrode of the third switching tube VT3 through the fourth current-limiting resistor R7, so that the super capacitor is charged in the initial stage VT5 in a cut-off region, and the purpose of constant current charging is achieved;
one end of the first voltage-dividing resistor R8 is connected with the positive electrode of the super capacitor E1, the other end of the first voltage-dividing resistor R8 is connected with one end of the second voltage-dividing resistor R9, and the other end of the second voltage-dividing resistor R9 is connected with the ground;
the reference end of a voltage regulator tube VP1 is connected with the connection point of a first voltage-dividing resistor R8 and a second voltage-dividing resistor R9, the anode of the voltage regulator tube VP1 is connected with the ground, the cathode of the voltage regulator tube VP1 is connected with the direct current output side of the full-wave rectifier bridge through a second current-limiting resistor R5, and the connection point of the cathode of the voltage regulator tube VP1 and the second current-limiting resistor R5 is connected with the B pole of a sixth switching tube VT6 through a third current-limiting resistor R6;
the sixth switching tube VT6 is a PNP triode, and its C pole is connected to the source of the third switching tube VT3 through the fourth current limiting resistor R7, so that when the charging of the super capacitor reaches the set maximum voltage threshold, the sixth switching tube VT6 starts to work in the conducting region, thereby achieving the purpose of constant voltage charging.
6. The power management circuit of the fault indicator based on the CT energy extraction, as claimed in claim 1, wherein the boost output module includes a second filter capacitor C2, an inductor L1, a boost chip N3, a feedback capacitor C6, a first feedback resistor R10, a second feedback resistor R11, a third filter capacitor C3, and a high power output VOUT2, wherein:
one end of the second filter capacitor C2 is connected with the input end and the enable end of the boost chip N3, and the other end of the second filter capacitor C2 is connected with the ground, so that the purposes of controlling the N3 to work and stabilizing the input voltage of the N3 are achieved;
one end of the inductor L1 is connected with the input end and the enable end of the boost chip N3, and the other end of the inductor L1 is connected with the switch control end of the boost chip N3, so that the purpose of controlling the switch in the N3 to work is achieved;
one end of a feedback capacitor C6 is connected with one end of a first feedback resistor R10 and the output end of a boosting chip N3, the other end of the feedback capacitor C6 is connected with the other end of the first feedback resistor R10, one end of a second feedback resistor R11 and the feedback end of the boosting chip N3, and the other end of the second feedback resistor R11 is connected with the ground, so that the purpose of stabilizing the output voltage of the boosting chip N3 is achieved;
one end of the third filter capacitor C3 is connected with the output ends of the high-power output VOUT2 and the boost chip N3, and the other end of the third filter capacitor C3 is connected with the ground, so that the purpose of stabilizing the output voltage of the boost output module is achieved.
7. The power management circuit of the fault indicator based on the CT energy taking is characterized in that the voltage stabilizing output module comprises an enabling chip N4, a voltage stabilizing chip N5, a fourth filter capacitor C4, a fifth filter capacitor C5, a delay capacitor C7, a voltage dropping resistor R12 and a micro-power output VOUT1, wherein:
one end of a voltage-reducing resistor R12 is connected with the input end of an enabling chip N4, the other end of a voltage-reducing resistor R12 is connected with the output end of the enabling chip N4 and the input end of a voltage-stabilizing chip N5, the delay control end of the enabling chip N4 is connected with one end of a delay capacitor C7, and the other end of the delay capacitor C7 is connected with the ground, so that the purposes of controlling the N5 to work and preventing repeated restarting are achieved;
the input end of the voltage stabilizing chip N5 is connected with one end of a fourth filter capacitor C4, and the other end of the fourth filter capacitor C4 is connected with the ground, so that the purpose of stabilizing the input voltage of N5 is achieved;
the output end of the voltage stabilizing chip N5 is connected with one end of the micro-power output VOUT1 and one end of the fifth filter capacitor C5, and the other end of the fifth filter capacitor C5 is connected with the ground, so that the purpose of stabilizing the output voltage of the micro-power output module is achieved.
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| CN202011519334.1A CN112701796A (en) | 2020-12-21 | 2020-12-21 | Fault indicator power management circuit based on CT energy taking |
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| CN202011519334.1A CN112701796A (en) | 2020-12-21 | 2020-12-21 | Fault indicator power management circuit based on CT energy taking |
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Cited By (1)
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| CN114008889A (en) * | 2021-06-18 | 2022-02-01 | 武汉领普科技有限公司 | Power supply circuit, sensing equipment and application thereof |
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