CN110943550A - Microcurrent-based power supply system - Google Patents
Microcurrent-based power supply system Download PDFInfo
- Publication number
- CN110943550A CN110943550A CN201911413331.7A CN201911413331A CN110943550A CN 110943550 A CN110943550 A CN 110943550A CN 201911413331 A CN201911413331 A CN 201911413331A CN 110943550 A CN110943550 A CN 110943550A
- Authority
- CN
- China
- Prior art keywords
- resistor
- chip
- power supply
- pin
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005611 electricity Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 64
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 18
- 229910052744 lithium Inorganic materials 0.000 claims description 18
- 101000908580 Homo sapiens Spliceosome RNA helicase DDX39B Proteins 0.000 claims description 10
- 102100024690 Spliceosome RNA helicase DDX39B Human genes 0.000 claims description 10
- 101001068634 Homo sapiens Protein PRRC2A Proteins 0.000 claims description 5
- 102100033954 Protein PRRC2A Human genes 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 3
- 238000003306 harvesting Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of AC power input into DC power output without possibility of reversal 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
- H02M7/217—Conversion of AC power input into DC power output without possibility of reversal 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
- H02M7/219—Conversion of AC power input into DC power output without possibility of reversal 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 in a bridge configuration
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention provides a power supply system based on micro-current, which comprises an energy collection module and a low-power consumption power supply module; the input end of the energy collection module inputs micro-current, and the energy collection module is used for collecting and converting the micro-current and outputting a voltage signal to the low-power-consumption power supply module; the input end of the low-power-consumption power supply module is connected with the output end of the energy collection module and is used for receiving the voltage signal of the energy collection module and converting the voltage signal into a stable voltage signal to be supplied to a load; through the structure of the invention, the electric energy can be obtained from the harmonic wave of the exciting current of the generator, and the electric energy can be processed to provide stable and reliable working electricity for the load, thereby effectively avoiding the defects of the existing power supply mode.
Description
Technical Field
The invention relates to a power supply system, in particular to a power supply system based on micro-current.
Background
In the working process of a large-scale generator set, the working state of the generator needs to be monitored, various sensors such as a temperature sensor, a vibration sensor and chips for processing signals need to be used in the monitoring process, and the electric equipment needs stable low-voltage direct current in the working process; in the working process of the generator, the excitation current of the generator has harmonic components, generally speaking, the harmonic components are useless and can be filtered, and the harmonic components of the excitation current are weak, so that the harmonic components are not fully utilized in the prior art.
Therefore, in order to solve the above-mentioned technical problems, it is necessary to provide a new technical means for obtaining stable and reliable dc power from the harmonic of the field current of the generator and supplying the dc power to the monitoring electric device of the generator.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a power supply system based on micro-current, which can obtain electric energy from the harmonic of the excitation current of the generator, and can process the electric energy to provide stable and reliable power for operation to a load, thereby effectively avoiding the defects of the existing power supply method.
The invention provides a power supply system based on micro-current, which comprises an energy collection module and a low-power consumption power supply module;
the input end of the energy collection module inputs micro-current, and the energy collection module is used for collecting and converting the micro-current and outputting a voltage signal to the low-power-consumption power supply module;
and the input end of the low-power-consumption power supply module is connected with the output end of the energy collection module and is used for receiving the voltage signal of the energy collection module and converting the voltage signal into a stable voltage signal to be supplied to a load.
Further, the low-power-consumption power module comprises a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C9, a capacitor C10, an NMOS tube Q6, a PMOS tube Q7 and a diode D2;
the source of the PMOS tube Q7 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with one end of a resistor R11 through a resistor R9, the other end of the resistor R11 is grounded, and a common connection point between the source of the PMOS tube Q7 and the resistor R8 serves as the input end of the low-power-consumption power module and is connected with the output end of the energy collection module;
the source of a PMOS tube Q7 is connected with the gate of a PMOS tube Q7 through a resistor R13, the gate of the PMOS tube Q7 is connected with the drain of an NMOS tube Q6, the source of the NMOS tube Q6 is grounded, the gate of an NMOS tube Q6 is connected with the common connection point between the resistor R9 and the resistor R11, the gate of an NMOS tube Q6 is connected with the common connection point between the resistor R8 and the resistor R9 through a resistor R10, the gate of the NMOS tube Q6 is grounded through a resistor R12, the gate of the NMOS tube Q6 is grounded through a capacitor C9, the drain of the PMOS tube Q7 is grounded through a capacitor C10, and the common connection point of the drain of a PMOS tube Q7 and the capacitor C10 serves as the output end of the low-power-consumption;
the drain electrode of the PMOS tube Q7 is connected with the anode of the diode D2 after being connected in series through the resistor R14 and the resistor R15, the cathode of the diode D2 is connected with the grid electrode of the NMOS tube Q6, and the common connection point between the anode of the diode D2 and the resistor R15 is used as the control input end of the low-power-consumption power supply module.
Further, the energy collection module comprises a chip IC1, a lithium battery BAT1, a capacitor C1, a capacitor C2, a capacitor C3, a lithium battery BAT2, a capacitor C6, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, an inductor L1, a PMOS tube Q1, a PMOS tube Q2, a PMOS tube Q3 and a PMOS tube Q4;
the chip IC1 is a BQ25505RFRR chip, one end of an inductor L1 is grounded through a capacitor C1, the other end of the inductor L1 is connected with a pin 20 of the IC1, a common connection point between the inductor L1 and the capacitor C1 is used as an input end of the energy collection module, a pin 4 of the chip IC1 is grounded through a capacitor C2, a pin 1 of the chip IC1 is grounded, a pin 2 of the chip IC1 is connected to a common connection point between the inductor L1 and the capacitor C1, and a pin 5 of the chip IC1 is grounded;
an 8 pin of the chip IC1 is grounded after being connected in series with a resistor R1 and the resistor R1, a common connection point between the resistor R1 and the resistor R1 is connected with a 7 pin of the chip IC1, an 8 pin of the chip IC1 is connected with one end of the resistor R1 through the resistor R1, the other end of the resistor R1 is grounded through the resistor R1, a common connection point between the resistor R1 and the resistor R1 is connected with an 11 pin of the chip IC1, a common connection point between the resistor R1 and the resistor R1 is connected with a 12 pin of the chip IC1, pins 3 and 19 of the chip IC1 are connected with a source of the PMOS Q1, a source of the PMOS Q1 is grounded through a capacitor C1, a drain of the PMOS Q1 is connected with a source of the PMOS Q1, a pin 18 pin of the chip IC1 is connected with an anode of the lithium battery BAT1, a drain of the PMOS Q1 is connected with a drain of the PMOS Q1, and a drain of the PMOS Q1 is connected with a drain of the PMOS Q1 through the PMOS transistor 1. The common connection point between the drain of the PMOS tube Q4 and the capacitor C6 serves as the output end of the energy collection module, the grid of the PMOS tube Q1 and the grid of the PMOS tube Q2 are connected to the 9 pin of the chip IC1, the grids of the PMOS tube Q3 and the PMOS tube Q4 are connected to the 10 pin of the chip IC1, and the 14 pin of the chip IC1 is connected with the anode of the lithium battery BAT 2.
The low-power-consumption power supply module is used for detecting the output voltage of the low-power-consumption power supply module and controlling the low-power-consumption power supply module to stop power supply output when the output voltage of the low-power-consumption power supply module is lower than a set voltage value.
Further, the comparison control circuit comprises a reference circuit, a comparator U1, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20 and a triode Q8;
the comparator is a TLV3961 comparator, the in-phase end of the comparator U1 is connected with the output end of the reference circuit through a resistor R16, the in-phase end of the comparator U1 is connected with the output end of the comparator U1 through a resistor R17, the output end of the comparator U1 is connected with one end of a resistor R20, the other end of the resistor R20 is connected with the base electrode of the triode Q8, the emitter electrode of the triode Q8 is grounded, and the collector electrode of the triode Q8 serving as the control output end of the comparison control circuit is connected with the control input end of the low-power-consumption power supply module; one end of the resistor R18 is connected to the output end of the low-power-consumption power supply module, the other end of the resistor R18 is grounded through a resistor R19, and a common connection point of the resistor R18 and the resistor R19 is connected with the inverting end of the comparator U1.
The power supply device further comprises an electric energy acquisition module, wherein the electric energy acquisition module is used for receiving the alternating current signal output by the power taking equipment, converting the alternating current signal into direct current and providing the direct current for the energy collection module.
The overvoltage protection module is used for detecting a direct current voltage signal output by the electric energy acquisition module and executing overvoltage protection on a rear end circuit of the electric energy acquisition module when the voltage value is greater than a safety threshold value.
Further, the overvoltage protection module comprises an overvoltage judgment circuit and an overvoltage protection execution circuit;
the overvoltage protection execution circuit is used for receiving the control command output by the overvoltage judgment circuit and executing overvoltage protection on the rear end circuit of the electric energy acquisition module according to the control command;
the overvoltage judging circuit is used for detecting the output voltage of the electric energy obtaining module, comparing the output voltage with the safety threshold voltage, and outputting a control command to the overvoltage protection executing circuit and executing protection when the output voltage of the electric energy obtaining module is greater than the safety threshold voltage.
Further, the electric energy obtaining module comprises a rectifying circuit, a capacitor C8 and a diode D1;
the input end of the rectifying circuit is connected with the output end of the power taking device, the output end of the rectifying circuit is grounded through a capacitor C8, the output end of the rectifying circuit is connected with the anode of a diode D1, and the cathode of the diode D1 serves as the output end of the electric energy obtaining module.
Further, the overvoltage protection circuit comprises an overvoltage judgment circuit and an overvoltage protection execution circuit;
the overvoltage judging circuit comprises a chip IC2, a capacitor C13, a resistor R22, a resistor R23, a resistor R24, a resistor R25 and a resistor R26;
the overvoltage protection execution circuit comprises an NMOS transistor Q5;
the chip IC2 is an ADCMP341 chip, a pin 7 of the chip IC2 is grounded through a capacitor C13, a common connection point between the capacitor C13 and the pin 7 of the chip IC2 is connected to a power supply end VO1 as a power supply input end of the chip IC2, one end of a resistor R25 is connected to a power supply end V01 as a detection input end of an overvoltage judging circuit, the other end of a resistor R25 is grounded after being connected in series with a resistor R22 through a resistor R26, a common connection point between a resistor R25 and a resistor R26 is connected with a pin 2 of the chip IC2, a common connection point between a resistor R26 and a resistor R22 is connected with a pin 3 of the chip IC2, one end of the resistor R23 is connected to the power supply end VO 23, the other end of the resistor R23 is connected with one end of the resistor R23, the other end of the resistor R23 is connected with a pin 1 of the chip IC 23, a pin 4 of the chip;
the grid electrode of the NMOS tube Q5 is used as the input end of the overvoltage protection execution circuit and is connected with the output end of the overvoltage judgment circuit, the source electrode of the NMOS tube Q5 is grounded, and the drain electrode of the NMOS tube Q5 is connected with the anode of the diode D1.
The invention has the beneficial effects that: according to the invention, the electric energy can be obtained from the harmonic wave of the exciting current of the generator, and the electric energy can be processed to provide stable and reliable working electricity for the load, so that the defects of the existing power supply mode are effectively avoided.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a circuit schematic of the energy harvesting module of the present invention.
Fig. 3 is a schematic circuit diagram of a low power consumption power module according to the present invention.
Fig. 4 is a schematic circuit diagram of the overvoltage judging circuit of the present invention.
FIG. 5 is a schematic circuit diagram of the comparison control circuit of the present invention.
Fig. 6 is a schematic circuit diagram of the power harvesting module of the present invention.
FIG. 7 is a circuit schematic of the reference circuit of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings of the specification:
the invention provides a power supply system based on micro-current, which comprises an energy collection module and a low-power consumption power supply module;
the input end of the energy collection module inputs micro-current, and the energy collection module is used for collecting and converting the micro-current and outputting a voltage signal to the low-power-consumption power supply module;
the input end of the low-power-consumption power supply module is connected with the output end of the energy collection module and is used for receiving the voltage signal of the energy collection module and converting the voltage signal into a stable voltage signal to be supplied to a load; by the structure, electric energy can be obtained from the harmonic wave of the exciting current of the generator, and the electric energy can be processed to provide stable and reliable working electricity for a load, so that the defects of the existing power supply mode are effectively avoided; the micro-current input by the input end of the energy collection module is input after being rectified and filtered through micro-current signals output by a current transformer and the like, and the structure is not only suitable for a generator, but also suitable for occasions where the micro-current can be obtained in other equipment.
In this embodiment, the low power consumption power module includes a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C9, a capacitor C10, an NMOS transistor Q6, a PMOS transistor Q7, and a diode D2;
the source of the PMOS tube Q7 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with one end of a resistor R11 through a resistor R9, the other end of the resistor R11 is grounded, and a common connection point between the source of the PMOS tube Q7 and the resistor R8 serves as the input end of the low-power-consumption power module and is connected with the output end of the energy collection module;
the source of a PMOS tube Q7 is connected with the gate of a PMOS tube Q7 through a resistor R13, the gate of the PMOS tube Q7 is connected with the drain of an NMOS tube Q6, the source of the NMOS tube Q6 is grounded, the gate of an NMOS tube Q6 is connected with the common connection point between the resistor R9 and the resistor R11, the gate of an NMOS tube Q6 is connected with the common connection point between the resistor R8 and the resistor R9 through a resistor R10, the gate of the NMOS tube Q6 is grounded through a resistor R12, the gate of the NMOS tube Q6 is grounded through a capacitor C9, the drain of the PMOS tube Q7 is grounded through a capacitor C10, and the common connection point of the drain of a PMOS tube Q7 and the capacitor C10 serves as the output end of the low-power-consumption;
the drain electrode of the PMOS tube Q7 is connected with the anode of the diode D2 after being connected in series through the resistor R14 and the resistor R15, the cathode of the diode D2 is connected with the grid electrode of the NMOS tube Q6, and the common connection point between the anode of the diode D2 and the resistor R15 is used as the control input end of the low-power-consumption power supply module; when the circuit starts to work, the voltage of the capacitor C9 is very low, at this time, because the voltage value obtained by the grid of the NMOS tube Q6 is very small, and because the on-resistance of the NMOS tube Q6 is large, and by setting the resistance values of the resistors R8-R13 (the resistance values are generally in the megaohm range), the NMOS transistor Q6 is cut off, the PMOS transistor Q7 is also cut off, therefore, the leakage current is extremely small, the self-loss of the circuit is reduced, the discharge time of the capacitor C6 is delayed, therefore, energy loss is prevented, as the voltage of the capacitor C9 gradually rises, the gate voltage of the NMOS transistor Q6 gradually rises until the NMOS transistor Q6 is turned on, at the moment, the gate voltage of the PMOS transistor Q7 is pulled low, thereby, the PMOS transistor Q7 is conducted, the grid of the NMOS transistor Q6 is supplied with power by superposition through the resistor R14, the resistor R15 and the diode D2, therefore, the NMOS transistor Q6 will be in continuous conduction, and the PMOS transistor Q7 will also be in continuous conduction, ensuring the continuity of the power supply time.
In this embodiment, the energy collection module includes a chip IC1, a lithium battery BAT1, a capacitor C1, a capacitor C2, a capacitor C3, a lithium battery BAT2, a capacitor C6, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, an inductor L1, a PMOS transistor Q1, a PMOS transistor Q2, a PMOS transistor Q3, and a PMOS transistor Q4;
the chip IC1 is a BQ25505RFRR chip, one end of an inductor L1 is grounded through a capacitor C1, the other end of the inductor L1 is connected with a pin 20 of the IC1, a common connection point between the inductor L1 and the capacitor C1 is used as an input end of the energy collection module, a pin 4 of the chip IC1 is grounded through a capacitor C2, a pin 1 of the chip IC1 is grounded, a pin 2 of the chip IC1 is connected to a common connection point between the inductor L1 and the capacitor C1, and a pin 5 of the chip IC1 is grounded;
an 8 pin of the chip IC1 is grounded after being connected in series with a resistor R1 and the resistor R1, a common connection point between the resistor R1 and the resistor R1 is connected with a 7 pin of the chip IC1, an 8 pin of the chip IC1 is connected with one end of the resistor R1 through the resistor R1, the other end of the resistor R1 is grounded through the resistor R1, a common connection point between the resistor R1 and the resistor R1 is connected with an 11 pin of the chip IC1, a common connection point between the resistor R1 and the resistor R1 is connected with a 12 pin of the chip IC1, pins 3 and 19 of the chip IC1 are connected with a source of the PMOS Q1, a source of the PMOS Q1 is grounded through a capacitor C1, a drain of the PMOS Q1 is connected with a source of the PMOS Q1, a pin 18 pin of the chip IC1 is connected with an anode of the lithium battery BAT1, a drain of the PMOS Q1 is connected with a drain of the PMOS Q1, and a drain of the PMOS Q1 is connected with a drain of the PMOS Q1 through the PMOS transistor 1. The common connection point between the drain of the PMOS tube Q4 and the capacitor C6 is used as the output end of the energy collection module, the grid of the PMOS tube Q1 and the grid of the PMOS tube Q2 are connected to the 9 pins of the chip IC1, the grids of the PMOS tube Q3 and the PMOS tube Q4 are connected to the 10 pins of the chip IC1, and the 14 pins of the chip IC1 are connected with the positive electrode of the lithium battery BAT 2. The 11 pins and 12 pins, R3, R4 and R5 of the chip IC1 set the working range of the battery voltage; the voltage of a 19 pin of the chip IC1 is sampled by a 3 pin of the chip IC1, when the voltage of the lithium battery BAT1 is higher than a set threshold value, a 9 pin of the chip IC1 is at a low level, a 14 pin of the chip IC1 is at a high level, and the PMOS tube Q1 and the PMOS tube Q2 are conducted; when the lithium battery BAT1 is lower than a set threshold value, the 9 pin of the chip IC1 is at a high level, the 14 pin of the chip IC1 is at a low level, the PMOS tube Q3 and the PMOS tube Q4 are conducted, and the lithium battery BAT2 supplies power to a load; the 20 pins of the chip IC1 can effectively extract energy from the power acquisition module to charge the lithium battery BAT1 connected to the 18 pins of the chip IC 1; lithium battery BAT1 and lithium battery BAT2 work alternately.
In this embodiment, the power supply device further includes a comparison control circuit, where the comparison control circuit is configured to detect an output voltage of the low power consumption power supply module, and control the low power consumption power supply module to stop power supply output when the output voltage of the low power consumption power supply module is lower than a set voltage value.
Specifically, the method comprises the following steps: the comparison control circuit comprises a reference circuit, a comparator U1, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20 and a triode Q8;
the comparator is a TLV3961 comparator, the in-phase end of the comparator U1 is connected with the output end of the reference circuit through a resistor R16, the in-phase end of the comparator U1 is connected with the output end of the comparator U1 through a resistor R17, the output end of the comparator U1 is connected with one end of a resistor R20, the other end of the resistor R20 is connected with the base of a triode Q8, the emitter of a triode Q8 is grounded, and the collector of the triode Q8 is used as the control output end of the comparison control circuit and connected with the control input end of the low-power-consumption power supply module, namely the common connection point between a diode D2 and the resistor R15; one end of the resistor R18 is connected to the output end of the low-power-consumption power supply module, the other end of the resistor R18 is grounded through a resistor R19, and a common connection point of the resistor R18 and the resistor R19 is connected with the inverting end of the comparator U1. Because the input current of the whole power supply system is weak, when the input current is not enough to continuously meet the subsequent power consumption voltage requirement, if the low-power consumption power supply module supplies power to subsequent loads, the loads are in an undervoltage working state, which cannot accurately output the power to the loads such as a temperature sensor and a vibration sensor, when the output voltage of the low-power-consumption power supply module is lower than a set value, the comparator U1 outputs high level, the triode Q8 is conducted, the positive electrode potential of the diode D2 is pulled low, so that the grid voltage of the NMOS tube Q6 of the low-power-consumption power supply module is pulled low and is cut off, therefore, the PMOS tube Q7 is cut off, the low-power consumption power supply module has no output, the conduction of the triode Q8 accelerates the discharge of the capacitor C10, reduces the grid voltage of the NMOS tube Q6, and leads the NMOS tube Q6 to be cut off rapidly, thereby clamping and protecting the subsequent circuit, wherein the reference circuit adopts a REF33 series reference circuit.
In this embodiment, still include the electric energy acquisition module, the electric energy acquisition module is used for receiving the alternating current signal of getting the output of electrical equipment to convert alternating current signal to the direct current and provide energy collection module, specifically:
the electric energy acquisition module comprises a rectifying circuit, a capacitor C8 and a diode D1;
the input end of the rectifying circuit is connected with the output end of the electricity taking device, the output end of the rectifying circuit is grounded through a capacitor C8, the output end of the rectifying circuit is connected with the anode of a diode D1, the cathode of a diode D1 is used as the output end of the electric energy obtaining module, wherein the rectifying circuit adopts a full-bridge rectifying circuit formed by ideal diodes, the loss of the full-bridge rectifying circuit is within 0.1V when the full-bridge rectifying circuit passes through 10A current, the electricity taking device generally refers to a current transformer or a voltage transformer, certainly, a current sensor or a voltage sensor can not be used in other occasions with micro alternating current, the full-bridge rectifying circuit can be directly connected with the rectifying circuit, the rectifying circuit adopts an approximate and ideal rectifying circuit, namely, the voltage drop of the rectifying circuit is below 0.1.
In this embodiment, the overvoltage protection module includes an overvoltage judgment circuit and an overvoltage protection execution circuit;
the overvoltage protection execution circuit is used for receiving the control command output by the overvoltage judgment circuit and executing overvoltage protection on the rear end circuit of the electric energy acquisition module according to the control command;
the overvoltage judging circuit is used for detecting the output voltage of the electric energy obtaining module, comparing the output voltage with the safety threshold voltage, and outputting a control command to the overvoltage protection executing circuit and executing protection when the output voltage of the electric energy obtaining module is greater than the safety threshold voltage.
The overvoltage protection circuit comprises an overvoltage judging circuit and an overvoltage protection execution circuit;
the overvoltage judging circuit comprises a chip IC2, a capacitor C13, a resistor R22, a resistor R23, a resistor R24, a resistor R25 and a resistor R26;
the overvoltage protection execution circuit comprises an NMOS transistor Q5;
the chip IC2 is an ADCMP341 chip, a pin 7 of the chip IC2 is grounded through a capacitor C13, a common connection point between the capacitor C13 and the pin 7 of the chip IC2 is connected to a power supply end VO1 as a power supply input end of the chip IC2, one end of a resistor R25 is connected to a power supply end V01 as a detection input end of an overvoltage judging circuit, the other end of a resistor R25 is grounded after being connected in series with a resistor R22 through a resistor R26, a common connection point between a resistor R25 and a resistor R26 is connected with a pin 2 of the chip IC2, a common connection point between a resistor R26 and a resistor R22 is connected with a pin 3 of the chip IC2, one end of the resistor R23 is connected to the power supply end VO 23, the other end of the resistor R23 is connected with one end of the resistor R23, the other end of the resistor R23 is connected with a pin 1 of the chip IC 23, a pin 4 of the chip;
the grid electrode of the NMOS tube Q5 is used as the input end of the overvoltage protection execution circuit and is connected with the output end of the overvoltage judgment circuit, the source electrode of the NMOS tube Q5 is grounded, and the drain electrode of the NMOS tube Q5 is connected with the anode of the diode D1.
Although the input current of the whole system is small, the situation of sudden voltage fluctuation is inevitable due to the influence of the use environment and the like, if the voltage peak value is too large, the subsequent circuit is damaged, and the subsequent circuit can be effectively protected by the structure; the hysteresis comparator is formed by the IC2, the resistor R22, the resistor R25 and the resistor R26, when the hysteresis comparator is normal, a pin 1 of the IC2 outputs a low level, the NMOS tube Q5 does not act, when the output voltage of the electric energy acquisition circuit is higher than a voltage safety threshold value, the chip IC2 outputs a high level, so that the NMOS tube Q5 is conducted, the voltage of the electric energy acquisition module is pulled down through the resistor R7, and the resistor R7 is a small-resistance high-power resistor and is used for consuming energy generated by overvoltage, so that a follow-up circuit is protected from being damaged due to overhigh voltage; in order to indicate the overvoltage protection in the implementation process, an indicating circuit is further arranged, the indicating circuit comprises a resistor R6 and a light emitting diode ED1, the anode of the light emitting diode ED1 is connected to the anode of a diode D1 through a resistor R6, the cathode of the light emitting diode ED1 is connected with the drain of an NMOS tube Q5, when an NMOS tube Q5 is conducted, the potential of the anode of the diode D1 is pulled down, overvoltage protection is achieved, a power supply loop of the light emitting diode DE1 is conducted, and the light emitting diode ED1 works and emits light.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (10)
1. A power supply system based on micro-current is characterized in that: the device comprises an energy collection module and a low-power consumption power supply module;
the input end of the energy collection module inputs micro-current, and the energy collection module is used for collecting and converting the micro-current and outputting a voltage signal to the low-power-consumption power supply module;
and the input end of the low-power-consumption power supply module is connected with the output end of the energy collection module and is used for receiving the voltage signal of the energy collection module and converting the voltage signal into a stable voltage signal to be supplied to a load.
2. The microcurrent-based power supply system according to claim 1, wherein: the low-power-consumption power module comprises a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a capacitor C9, a capacitor C10, an NMOS tube Q6, a PMOS tube Q7 and a diode D2;
the source of the PMOS tube Q7 is connected with one end of a resistor R8, the other end of the resistor R8 is connected with one end of a resistor R11 through a resistor R9, the other end of the resistor R11 is grounded, and a common connection point between the source of the PMOS tube Q7 and the resistor R8 serves as the input end of the low-power-consumption power module and is connected with the output end of the energy collection module;
the source of a PMOS tube Q7 is connected with the gate of a PMOS tube Q7 through a resistor R13, the gate of the PMOS tube Q7 is connected with the drain of an NMOS tube Q6, the source of the NMOS tube Q6 is grounded, the gate of an NMOS tube Q6 is connected with the common connection point between the resistor R9 and the resistor R11, the gate of an NMOS tube Q6 is connected with the common connection point between the resistor R8 and the resistor R9 through a resistor R10, the gate of the NMOS tube Q6 is grounded through a resistor R12, the gate of the NMOS tube Q6 is grounded through a capacitor C9, the drain of the PMOS tube Q7 is grounded through a capacitor C10, and the common connection point of the drain of a PMOS tube Q7 and the capacitor C10 serves as the output end of the low-power-consumption;
the drain electrode of the PMOS tube Q7 is connected with the anode of the diode D2 after being connected in series through the resistor R14 and the resistor R15, the cathode of the diode D2 is connected with the grid electrode of the NMOS tube Q6, and the common connection point between the anode of the diode D2 and the resistor R15 is used as the control input end of the low-power-consumption power supply module.
3. The microcurrent-based power supply system according to claim 1, wherein: the energy collection module comprises a chip IC1, a lithium battery BAT1, a capacitor C1, a capacitor C2, a capacitor C3, a lithium battery BAT2, a capacitor C6, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, an inductor L1, a PMOS tube Q1, a PMOS tube Q2, a PMOS tube Q3 and a PMOS tube Q4;
the chip IC1 is a BQ25505RFRR chip, one end of an inductor L1 is grounded through a capacitor C1, the other end of the inductor L1 is connected with a pin 20 of the IC1, a common connection point between the inductor L1 and the capacitor C1 is used as an input end of the energy collection module, a pin 4 of the chip IC1 is grounded through a capacitor C2, a pin 1 of the chip IC1 is grounded, a pin 2 of the chip IC1 is connected to a common connection point between the inductor L1 and the capacitor C1, and a pin 5 of the chip IC1 is grounded;
an 8 pin of the chip IC1 is grounded after being connected in series with a resistor R1 and the resistor R1, a common connection point between the resistor R1 and the resistor R1 is connected with a 7 pin of the chip IC1, an 8 pin of the chip IC1 is connected with one end of the resistor R1 through the resistor R1, the other end of the resistor R1 is grounded through the resistor R1, a common connection point between the resistor R1 and the resistor R1 is connected with an 11 pin of the chip IC1, a common connection point between the resistor R1 and the resistor R1 is connected with a 12 pin of the chip IC1, pins 3 and 19 of the chip IC1 are connected with a source of the PMOS Q1, a source of the PMOS Q1 is grounded through a capacitor C1, a drain of the PMOS Q1 is connected with a source of the PMOS Q1, a pin 18 pin of the chip IC1 is connected with an anode of the lithium battery BAT1, a drain of the PMOS Q1 is connected with a drain of the PMOS Q1, and a drain of the PMOS Q1 is connected with a drain of the PMOS Q1 through the PMOS transistor 1. The common connection point between the drain of the PMOS tube Q4 and the capacitor C6 serves as the output end of the energy collection module, the grid of the PMOS tube Q1 and the grid of the PMOS tube Q2 are connected to the 9 pin of the chip IC1, the grids of the PMOS tube Q3 and the PMOS tube Q4 are connected to the 10 pin of the chip IC1, and the 14 pin of the chip IC1 is connected with the anode of the lithium battery BAT 2.
4. The microcurrent-based power supply system according to claim 1, wherein: the power supply control circuit is used for detecting the output voltage of the low-power-consumption power supply module and controlling the low-power-consumption power supply module to stop power supply output when the output voltage of the low-power-consumption power supply module is lower than a set voltage value.
5. The microcurrent-based power supply system of claim 4, wherein: the comparison control circuit comprises a reference circuit, a comparator U1, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20 and a triode Q8;
the comparator is a TLV3961 comparator, the in-phase end of the comparator U1 is connected with the output end of the reference circuit through a resistor R16, the in-phase end of the comparator U1 is connected with the output end of the comparator U1 through a resistor R17, the output end of the comparator U1 is connected with one end of a resistor R20, the other end of the resistor R20 is connected with the base electrode of the triode Q8, the emitter electrode of the triode Q8 is grounded, and the collector electrode of the triode Q8 serving as the control output end of the comparison control circuit is connected with the control input end of the low-power-consumption power supply module; one end of the resistor R18 is connected to the output end of the low-power-consumption power supply module, the other end of the resistor R18 is grounded through a resistor R19, and a common connection point of the resistor R18 and the resistor R19 is connected with the inverting end of the comparator U1.
6. The microcurrent-based power supply system of claim 5, wherein: the electric energy acquisition module is used for receiving alternating current signals output by the electricity taking equipment, converting the alternating current signals into direct current and providing the direct current to the energy collection module.
7. The microcurrent-based power supply system of claim 6, wherein: the overvoltage protection module is used for detecting a direct current voltage signal output by the electric energy acquisition module and executing overvoltage protection on a rear end circuit of the electric energy acquisition module when the voltage value is greater than a safety threshold value.
8. The microcurrent-based power supply system of claim 7, wherein: the overvoltage protection module comprises an overvoltage judgment circuit and an overvoltage protection execution circuit;
the overvoltage protection execution circuit is used for receiving the control command output by the overvoltage judgment circuit and executing overvoltage protection on the rear end circuit of the electric energy acquisition module according to the control command;
the overvoltage judging circuit is used for detecting the output voltage of the electric energy obtaining module, comparing the output voltage with the safety threshold voltage, and outputting a control command to the overvoltage protection executing circuit and executing protection when the output voltage of the electric energy obtaining module is greater than the safety threshold voltage.
9. The microcurrent-based power supply system of claim 8, wherein: the electric energy acquisition module comprises a rectifying circuit, a capacitor C8 and a diode D1;
the input end of the rectifying circuit is connected with the output end of the power taking device, the output end of the rectifying circuit is grounded through a capacitor C8, the output end of the rectifying circuit is connected with the anode of a diode D1, and the cathode of the diode D1 serves as the output end of the electric energy obtaining module.
10. The microcurrent-based power supply system of claim 9, wherein: the overvoltage protection circuit comprises an overvoltage judging circuit and an overvoltage protection execution circuit;
the overvoltage judging circuit comprises a chip IC2, a capacitor C13, a resistor R22, a resistor R23, a resistor R24, a resistor R25 and a resistor R26;
the overvoltage protection execution circuit comprises an NMOS transistor Q5;
the chip IC2 is an ADCMP341 chip, a pin 7 of the chip IC2 is grounded through a capacitor C13, a common connection point between the capacitor C13 and the pin 7 of the chip IC2 is connected to a power supply end VO1 as a power supply input end of the chip IC2, one end of a resistor R25 is connected to a power supply end V01 as a detection input end of an overvoltage judging circuit, the other end of a resistor R25 is grounded after being connected in series with a resistor R22 through a resistor R26, a common connection point between a resistor R25 and a resistor R26 is connected with a pin 2 of the chip IC2, a common connection point between a resistor R26 and a resistor R22 is connected with a pin 3 of the chip IC2, one end of the resistor R23 is connected to the power supply end VO 23, the other end of the resistor R23 is connected with one end of the resistor R23, the other end of the resistor R23 is connected with a pin 1 of the chip IC 23, a pin 4 of the chip;
the grid electrode of the NMOS tube Q5 is used as the input end of the overvoltage protection execution circuit and is connected with the output end of the overvoltage judgment circuit, the source electrode of the NMOS tube Q5 is grounded, and the drain electrode of the NMOS tube Q5 is connected with the anode of the diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911413331.7A CN110943550A (en) | 2019-12-31 | 2019-12-31 | Microcurrent-based power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911413331.7A CN110943550A (en) | 2019-12-31 | 2019-12-31 | Microcurrent-based power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110943550A true CN110943550A (en) | 2020-03-31 |
Family
ID=69912787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911413331.7A Pending CN110943550A (en) | 2019-12-31 | 2019-12-31 | Microcurrent-based power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110943550A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034114A (en) * | 2006-03-10 | 2007-09-12 | 科圆半导体（上海）有限公司 | Over and behind voltage testing circuit |
| US20100060231A1 (en) * | 2006-01-05 | 2010-03-11 | Tpl, Inc. | Method and Apparatus for Energy Harvesting and/or Generation, Storage, and Delivery |
| CN202210753U (en) * | 2011-09-01 | 2012-05-02 | 东莞市圣宝电子制造有限公司 | Low power consumption power control circuit |
| CN202737769U (en) * | 2012-07-16 | 2013-02-13 | 广东电网公司佛山供电局 | High-voltage line suspension electricity-taking apparatus |
| CN104102318A (en) * | 2013-04-15 | 2014-10-15 | 鸿富锦精密电子(天津)有限公司 | Power source circuit |
| CN107394906A (en) * | 2017-08-23 | 2017-11-24 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | A kind of sensor node electric power management circuit |
| CN107895997A (en) * | 2017-12-29 | 2018-04-10 | 中国电子科技集团公司信息科学研究院 | A kind of energy resource system of multiple-energy-source composite power supply |
| CN210898644U (en) * | 2019-12-31 | 2020-06-30 | 重庆勤智科技有限公司 | Power supply system based on micro-current |
-
2019
- 2019-12-31 CN CN201911413331.7A patent/CN110943550A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100060231A1 (en) * | 2006-01-05 | 2010-03-11 | Tpl, Inc. | Method and Apparatus for Energy Harvesting and/or Generation, Storage, and Delivery |
| CN101034114A (en) * | 2006-03-10 | 2007-09-12 | 科圆半导体（上海）有限公司 | Over and behind voltage testing circuit |
| CN202210753U (en) * | 2011-09-01 | 2012-05-02 | 东莞市圣宝电子制造有限公司 | Low power consumption power control circuit |
| CN202737769U (en) * | 2012-07-16 | 2013-02-13 | 广东电网公司佛山供电局 | High-voltage line suspension electricity-taking apparatus |
| CN104102318A (en) * | 2013-04-15 | 2014-10-15 | 鸿富锦精密电子(天津)有限公司 | Power source circuit |
| CN107394906A (en) * | 2017-08-23 | 2017-11-24 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | A kind of sensor node electric power management circuit |
| CN107895997A (en) * | 2017-12-29 | 2018-04-10 | 中国电子科技集团公司信息科学研究院 | A kind of energy resource system of multiple-energy-source composite power supply |
| CN210898644U (en) * | 2019-12-31 | 2020-06-30 | 重庆勤智科技有限公司 | Power supply system based on micro-current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101447666B (en) | Power supply system and power overvoltage safety protection control method | |
| CN104730441B (en) | Transistors breakdown detection device | |
| CN202395473U (en) | Charging device for super capacitor | |
| CN108736567B (en) | Power supply system for power monitoring | |
| WO2024244983A8 (en) | Energy storage apparatus and energy storage apparatus open circuit control method | |
| CN210898644U (en) | Power supply system based on micro-current | |
| CN211377693U (en) | Power transmission line hybrid power supply based on solar energy and induction energy obtaining | |
| CN110376529B (en) | Energy storage type multifunctional lithium battery detection system | |
| CN211579672U (en) | Online power taking system for monitoring generator | |
| CN101487871B (en) | Detection system for monitoring the conduction state of the bridge arm in the rectifier | |
| CN100553070C (en) | An uninterruptible power supply with multiple protection functions | |
| CN110943550A (en) | Microcurrent-based power supply system | |
| CN211018378U (en) | A circuit structure used for solar panel to charge rechargeable battery | |
| CN204068210U (en) | short circuit protection circuit | |
| CN202978236U (en) | Current limiting protection circuit of AC current of photovoltaic inverter | |
| CN215866968U (en) | Transistor monitoring circuit and rectifying device | |
| CN215646155U (en) | Battery protection circuit and chip | |
| CN211606083U (en) | Short-circuit protection circuit of IPM circuit, drive circuit and electronic equipment | |
| CN204515039U (en) | Fault detector | |
| CN210577924U (en) | Charging circuit based on solar charging and system thereof | |
| CN211296171U (en) | Quick digital short-circuit protection circuit based on LLC resonant cavity current | |
| CN203339686U (en) | Constant current source short circuit protection inhibition circuit | |
| CN209182386U (en) | The airborne device looses power offline inspection circuit of direct current | |
| CN109212433B (en) | Inverter IGBT fault early warning and protection circuit | |
| CN104393563A (en) | Mains supply monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |