CN112751403B - Composite power supply circuit - Google Patents

Composite power supply circuit Download PDF

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Publication number
CN112751403B
CN112751403B CN202110012756.8A CN202110012756A CN112751403B CN 112751403 B CN112751403 B CN 112751403B CN 202110012756 A CN202110012756 A CN 202110012756A CN 112751403 B CN112751403 B CN 112751403B
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circuit
power supply
capacitor
energy storage
energy
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CN112751403A (en
Inventor
张晓升
张帆
陈剑南
尹骊程
曾绪
李睦铨
涂程
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University of Electronic Science and Technology of China
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University of Electronic Science and Technology of China
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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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • 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
    • 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
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode

Abstract

The invention discloses a pulse energy power circuit and a composite power circuit and a system based on maximum power detection, wherein a rectifying circuit comprises: rectifying the power output by the pulse energy device; the maximum power energy storage circuit: a primary energy storage device matched with the pulse energy device in impedance is connected to the rectification rear side of the rectification circuit and used for storing electric energy for continuous multi-cycle pulses and releasing the stored electric energy to a power supply energy storage circuit after the stored electric energy is controlled when the stored electric energy reaches the maximum output power; a sampling circuit N: the sampling circuit is used for sampling the maximum power energy storage circuit and then providing a sampling signal for the control circuit N; reference power supply: the reference signal and the power supply are used for providing a reference signal and a power supply for the control circuit N; a control circuit N: the sampling circuit is used for sampling a sampling signal and a reference signal; a switching circuit N: the circuit is used for controlling the connection or disconnection of a grounding loop of a power supply energy storage circuit N, and the power supply energy storage circuit N: for use as a power source for a load.

Description

Composite power supply circuit
Technical Field
The invention relates to the field of micro-energy management, in particular to a composite power supply circuit.
Background
With the rapid development of the internet of things, the energy supply of various electronic devices in a huge network becomes an urgent problem to be solved, and the conventional energy supply such as a battery and a super capacitor cannot meet the current requirement due to the frequent replacement, the contradiction between capacity and volume and the like. Among various solutions, collecting micro-energy in the surrounding environment is a method capable of fundamentally solving its energy supply.
Among various technologies for collecting micro energy in the surrounding environment, a friction generator is an important technology in current research, and the friction generator is a micro energy source which generates static electricity by using different materials to drive in the external environment to cause friction;
the energy (electric energy) can be regarded as pulse energy in nature, and is generally rectified and then subsequently managed to be stored for load use. The circuits currently managed are: CN 111740485A. See figure 1. The management circuit adopts the idea of peak detection storage technology. As shown in fig. 1, it samples the rear side of the rectification circuit, and samples the capacitor Cd to judge that the switch S is started when the pulse-type micro-energy reaches the set peak value 1 (ii) a Thus, the electric energy can be guided into Cr at the maximum pulse peak, and the storage is completed. In the design, the detection of the maximum pulse peak is completed by using RC. Wherein, C p Energy is buffered, but due to C p Along T p And R 3 The circuit is formed to release energy only for driving the transistor T p This portion of energy is lost and released, not participating in storage. Therefore, energy is wasted. That is, in its design concept, self-energizing C is used p The switching control is realized, partial energy loss is caused, and the use efficiency is greatly reduced.
Disclosure of Invention
The invention aims to provide a pulse energy power circuit and a composite power circuit based on maximum power detection, wherein the pulse energy power circuit based on maximum power detection adopts a secondary storage system to store the energy of a generator in a primary mode and release the energy to the secondary storage at the maximum power; the whole process has no energy waste; in addition, in order to solve the control problem, the invention adopts a composite management concept, provides a reference voltage by another micro energy source, has lower loss and can be periodically supplemented.
The invention is realized by the following technical scheme:
pulse energy power supply circuit based on maximum power detection includes:
a rectifier circuit: the pulse energy source device is used for being connected with the pulse energy source device and rectifying the power supply output by the pulse energy source device;
the maximum power energy storage circuit: a primary energy storage device matched with the pulse energy device in impedance is connected to the rectification rear side of the rectification circuit and used for storing electric energy for continuous multi-cycle pulses and releasing the stored electric energy to the power supply energy storage circuit after the stored electric energy reaches the maximum output power and is controlled;
a sampling circuit N: the sampling circuit is used for sampling the maximum power energy storage circuit and then providing a sampling signal for the control circuit N;
reference power supply: the reference signal and the power supply are used for providing a reference signal and a power supply for the control circuit N;
a control circuit N: the sampling circuit is used for controlling the switching circuit N according to the sampling signal and the reference signal, outputting a control signal for controlling the switching circuit N to be switched on when the sampling signal is characterized in that the primary energy storage device is in a maximum power state, and outputting a control signal for controlling the switching circuit N to be switched off when the sampling signal is expressed in that the primary energy storage device is in a non-maximum power state;
a switching circuit N: is used for controlling the conduction or the disconnection of the grounding loop of the power supply energy storage circuit N,
when the switch circuit N is switched on, the grounding loop of the power supply energy storage circuit N is switched on and is in a chargeable state, the maximum power energy storage circuit releases the stored energy to the power supply energy storage circuit N, and when the switch circuit N is switched off, the grounding loop of the power supply energy storage circuit N is switched off and is in a non-chargeable state, the maximum power energy storage circuit stores the stored energy;
and a power supply energy storage circuit N: for use as a power source for a load.
The design principle of the invention is as follows:
the maximum power energy storage circuit is directly arranged on the rectification rear side of the rectification circuit, continuously obtains pulse energy in multiple cycles, and is provided with multiple pulses in 1 cycle, so that the maximum power energy storage circuit can obtain enough power along with time accumulation, and electric energy is released to the power supply energy storage circuit N by the maximum power energy storage circuit in a maximum power state. The sampling circuit N, the reference power supply, the control circuit N and the switch circuit N form a control loop. Therefore, all energy output by the pulse energy device is stored by the maximum power energy storage circuit and then is transferred to the power supply energy storage circuit N.
Compared with the prior art, the invention adopts the water vat theory to explain the difference between the two: the circuit of the invention is provided with 2 water cylinders corresponding to a maximum power energy storage circuit and a power supply energy storage circuit N; the maximum power energy storage circuit is used for continuously obtaining electric energy, and is equivalent to continuously obtaining water flow by 1 water cylinder; and opening the access valves until the water is about to overflow, and then transferring the electric energy to the power supply energy storage circuit N by the maximum power energy storage circuit, namely opening the water valve to transfer the water in the first water tank to the second water tank. In the prior art, although 2 capacitors are adopted, which are equivalent to 2 water tanks, the first capacitor C p The function of (1) is to drive the switch, not to store energy. I.e. to start directly transferring water to the second water vat at the peak of the water flow in the water vat.
The invention adopts the management of the maximum power energy storage method, so the control circuit N of the invention needs to provide a reference power supply by the aid of external power supply. In the application environment of the micro-motion power supply, the micro-motion power supply generally cannot depend on the commercial power supply. Therefore, a button cell used for standby can be selected, but when the button cell is applied in the invention, after the working time is long, voltage drop occurs, namely the reference voltage value of the reference power supply is reduced, and at this time, the switch circuit N is conducted when the circuit is not in the initial set maximum power, so that the energy transmission efficiency is influenced. The invention also provides a composite design, namely a pulse energy power supply circuit based on maximum power detection is combined with the solar energy power supply circuit, the solar energy power supply circuit independently provides a capacitor, and the independent capacitor provides a reference power supply for the control circuit N in a full-charge state; since the current required in the control circuit N is small, only a few tens of microamperes, the loss of the line is small, and the capacitor can be kept at a high potential for a long time. Even after the loss, the loss of the capacitor can be supplemented by solar energy. Therefore, the whole system can obtain the composite power supply of 2 energy sources, and the pulse energy source device can continuously supply power to the system in a high-efficiency state.
Preferably, the first and second liquid crystal materials are,
the maximum power energy storage circuit comprises a capacitor Copt serving as a primary energy storage device; one end of the capacitor Copt is connected with the positive electrode of the rectification rear side of the rectification circuit, and the other end of the capacitor Copt is connected with the negative electrode of the rectification rear side of the rectification circuit.
The sampling circuit N comprises a capacitor bank formed by a capacitor C3 and a capacitor C4 which are connected in series, one end of the capacitor bank is connected with the anode of the rectification rear side of the rectification circuit, and the other end of the capacitor bank is connected with the cathode of the rectification rear side of the rectification circuit; the serial connection point of the capacitor C3 and the capacitor C4 is used as a sampling point, and the serial connection point provides 1 sampling signal for the control circuit N.
The control circuit N comprises a comparator U2, and a power supply terminal of the comparator U2 is connected with a power supply provided by a reference power supply; the positive end of the comparator U2 is connected with the sampling signal provided by the sampling circuit N, the bias end of the comparator U2 is connected with the reference signal provided by the reference power supply, and the output end of the comparator U2 is connected with the switching circuit N.
The switch circuit N comprises an MOS tube Q2, the power supply and energy storage circuit N comprises a diode D2, an inductor L1 and a capacitor Cs,
the grid of the MOS tube Q2 is connected with a control signal of the control circuit N, the source of the MOS tube Q2 is connected with the negative electrode of the rectification rear side, the drain of the MOS tube Q2 is connected with the negative electrode of the capacitor Cs and the positive electrode of the diode D2, the inductor L1 is connected with the capacitor Cs in series to form a secondary energy storage device, the diode D2 is connected with the secondary energy storage device in parallel, and the negative electrode of the diode D2 is connected with the inductor L1 and the positive electrode of the rectification rear side.
The rectifying circuit comprises a full-bridge rectifying circuit Z; the reference power supply is a button power supply or external direct current power supply; the pulse energy device is a nano friction generator TENG.
Wherein, the capacitance Copt is equivalent to: and the first-stage energy storage unit is used for being matched with the friction mechanical energy power supply part in impedance to obtain the maximum output power. The capacitor C3 and the capacitor C4 are used for dividing voltage and providing a reference voltage at a positive end of the input voltage comparator U2, the resistor R4 (megaohm level) and the resistor R5 are used for dividing voltage and providing a reference voltage at a negative end (bias) of the input voltage comparator U2, and an output signal of the voltage comparator is used for controlling the electronic switch MOS. The diode D2, the inductor L and the energy storage unit Cs form a second-stage energy storage unit.
Specifically, during operation:
the rectification circuit is in bridge type full wave rectification and is connected to the output rear end of the nano friction generator TENG to convert alternating current output by the nano friction generator into direct current.
The first-stage energy storage unit is a capacitor Copt which is in impedance matching with the nano friction generator and is used for obtaining the maximum output power of the nano friction generator.
The control and switch circuit part comprises a capacitor C3, a capacitor C4, a resistor R5, a voltage comparator U2 and an MOS (metal oxide semiconductor) tube Q2. The capacitor C3 and the capacitor C4 are connected in parallel to divide the voltage at two ends of the Copt to provide positive input reference voltage for the voltage comparator U2, the resistor R4 and the resistor R5 divide the voltage to provide negative input reference voltage for the voltage comparator U2, when the voltage of the capacitor Copt of the first-stage energy storage unit rises to a preset value, the voltage comparator U2 outputs high level to enable the MOS tube Q2 to be conducted, at the moment, the drain electrode and the source electrode are conducted, the capacitor Cs is in a chargeable state, and the energy stored by the capacitor Copt of the first-stage energy storage unit is released to the capacitor Cs of the second-stage energy storage unit. The second-stage energy storage unit also comprises an inductor L1 and a diode D2. When the MOS transistor Q2 is turned on, the process of transferring the energy stored in the first stage energy storage unit to the second stage energy storage unit mainly includes two stages, the first stage: when the MOS transistor Q2 is turned on, energy is first stored in the inductor L1 and the capacitor Cs from the capacitor Copt, and in the second stage: when the MOS transistor Q2 is disconnected, the energy stored by the inductor L1 is released to the capacitor Cs through the diode D2; thereby completing the entire energy storage process.
Preferably, the energy storage devices C1, C2, and Cs are any one of an energy storage capacitor, a super capacitor, and a rechargeable battery.
The composite power supply circuit comprises a pulse energy power supply circuit and a solar energy power supply circuit;
the pulse energy power supply circuit includes: a pulse energy power supply circuit based on maximum power detection;
the solar energy power supply circuit comprises:
a voltage reduction circuit M: the power supply is used for being connected with the solar energy device SC and reducing the voltage of the power supply output by the solar energy device SC;
a power supply energy storage circuit M: the voltage reduction rear side connected with the voltage reduction circuit M stores electric energy, and the electric energy is used as an energy supply power supply of a load and a reference power supply of a pulse energy power supply circuit based on maximum power detection to provide direct power supply;
control tank circuit M: the reference power supply is connected to the voltage reduction rear side of the voltage reduction circuit M and used for providing auxiliary power supply for the pulse energy power supply circuit based on maximum power detection;
sampling circuit M1: is used for sampling the voltage reduction side of the voltage reduction circuit M to obtain a first sampling signal,
the sampling circuit M2: for sampling the control tank circuit M to obtain a second sampling signal,
the control circuit M: the control circuit is used for outputting a control signal according to the first sampling signal and the second sampling signal, outputting a control signal for controlling the switch circuit M to be switched on when the first sampling signal is higher than the second sampling signal, and outputting a control signal for controlling the switch circuit M to be switched off when the first sampling signal is lower than the second sampling signal;
the switching circuit M: for controlling the conduction or the disconnection of the ground circuit of the tank circuit M for control,
when the switching circuit M is conducted, the grounding loop of the energy storage circuit M for control is conducted and is in a charging state, the voltage reduction circuit M charges the energy storage circuit M for control, and at the moment, the energy storage circuit M for power supply is used as a reference power supply of the pulse energy power supply circuit based on maximum power detection to provide direct power supply;
when the switch circuit M is turned off, the ground circuit of the control energy storage circuit M is turned off and is in a discharge state, and at this time, the control energy storage circuit M supplies auxiliary power as a reference power supply of the pulse energy power supply circuit based on maximum power detection.
The solar energy power supply circuit comprises:
the power supply energy storage circuit M comprises a capacitor C1, the control energy storage circuit M comprises a capacitor C2,
the capacitor C1 and the capacitor C2 are connected in parallel at the voltage reduction rear side of the voltage reduction circuit M, and the anode of the capacitor C2 and the anode of the capacitor C1 are connected and connected in parallel to form a reference power supply required by the pulse energy power supply circuit based on maximum power detection;
the sampling circuit M1 comprises a resistor R1 and a resistor R2 which are connected in series, and a resistor formed by connecting the resistor R1 and the resistor R2 in series is connected in series and in parallel with the voltage reduction rear side of the voltage reduction circuit M; a first sampling signal is led out from a serial node of the resistor R1 and the resistor R2;
the sampling circuit M2 comprises a resistor R3 and a diode D1 which are connected in series, and the resistor R3 and the diode D1 are connected in series and then connected with a capacitor C2 in parallel; a second sampling signal is led out from a node where the cathode of the diode D1 is connected with the resistor R3;
the control circuit M comprises a comparator U1, a first sampling signal is introduced into the positive end of the comparator U1, a second sampling signal is introduced into the offset end of the comparator U1, and the power supply terminal of the comparator U1 is connected with the voltage reduction rear side of the voltage reduction circuit M;
the switching circuit M comprises an MOS tube Q2, the grid electrode of the MOS tube Q2 is connected with the output end of the comparator U1, the source electrode of the MOS tube Q2 is grounded, and the drain electrode of the MOS tube Q2 is connected with the cathode of the capacitor C2 and the anode of the diode D1.
The pulse energy power supply circuit based on maximum power detection comprises: the device comprises a rectification circuit, a sampling circuit N, a control circuit N, a switch circuit N and a power supply energy storage circuit N;
the maximum power storage circuit comprises a capacitor Copt as a primary energy storage device; one end of the capacitor Copt is connected with the positive electrode of the rectification rear side of the rectification circuit, and the other end of the capacitor Copt is connected with the negative electrode of the rectification rear side of the rectification circuit.
The sampling circuit N comprises a capacitor bank formed by a capacitor C3 and a capacitor C4 which are connected in series, one end of the capacitor bank is connected with the anode of the rectification rear side of the rectification circuit, and the other end of the capacitor bank is connected with the cathode of the rectification rear side of the rectification circuit; the serial connection point of the capacitor C3 and the capacitor C4 serves as a sampling point, and the serial connection point provides 1 sampling signal for the control circuit N.
The control circuit N comprises a comparator U2, and a power supply terminal of the comparator U2 is connected with a power supply provided by the connection and parallel connection of the anode of the capacitor C2 and the anode of the capacitor C1; the positive end of the comparator U2 is connected with a sampling signal provided by the sampling circuit N, the bias end of the comparator U2 is connected with the reference signal provided by the parallel connection of the positive electrode of the capacitor C2 and the positive electrode of the capacitor C1, and the output end of the comparator U2 is connected to the switching circuit N.
The switch circuit N comprises an MOS tube Q2, the power supply and energy storage circuit N comprises a diode D2, an inductor L1 and a capacitor Cs,
the grid of the MOS tube Q2 is connected with a control signal of the control circuit N, the source electrode of the MOS tube Q2 is connected with the negative electrode of the rear side of rectification, the drain electrode of the MOS tube Q2 is connected with the negative electrode of the capacitor Cs and the positive electrode of the diode D2, the inductor L1 is connected with the capacitor Cs in series to form a secondary energy storage device, the diode D2 is connected with the secondary energy storage device in parallel, and the negative electrode of the diode D2 is connected with the inductor L1 and the positive electrode of the rear side of rectification.
The pulse energy device is a nano friction generator TENG; the capacitor Cs and the capacitor C1 are the same capacitor or independent capacitors.
The voltage reduction circuit M is used for stabilizing the output voltage of solar energy, one part of energy in the solar energy power supply circuit is used for supplying power and circuit bias to a comparator U2 in the pulse energy power supply circuit based on maximum power detection, and the other part of energy is used for supplying power to a load. The solar energy power supply circuit comprises two energy storage units, namely a capacitor C1 and a capacitor C2, wherein the capacitor C2 is used for supplying power to the comparator U2 and biasing the circuit, so that the whole circuit can realize self-power supply, and the capacitor C1 is used for supplying power to a load.
Preferably, the resistor R1 and the resistor R2 in the solar energy power supply circuit are connected in series and divided, and then input to the positive terminal of the comparator U1 to detect the output voltage after the solar voltage stabilization, and preferably, the resistor R3 and the low-power-consumption voltage reference chip D1 are used to provide the negative reference voltage of the voltage comparator U1. The comparator U1 outputs a control signal to control the switch, so that the charging of the two energy storage units is controlled.
Specifically, the voltage reduction circuit M is a switching type dc boost voltage stabilizing circuit, and is connected to the output of the solar energy to stabilize the output voltage to a set value of 5V. When the output voltage after the solar voltage stabilization reaches a set value, the energy storage unit capacitor C1 and the energy storage unit capacitor C2 are charged with energy at the same time when the solar energy is output, and power is supplied to the comparator U2. When the output of the solar energy after voltage stabilization does not reach the set value, the energy storage unit capacitor C2 supplies power to the voltage comparator U2.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. a pulse energy power supply circuit with higher efficiency and low loss is provided.
2. The invention relates to a power management circuit of a composite micro-energy source, which has the function of simultaneously managing solar energy and friction mechanical energy, and can simultaneously combine the advantages of the solar energy and the friction mechanical energy to make up the defects of the solar energy and the friction mechanical energy.
3. The self-driven energy storage circuit based on the capacitance can supply energy to the circuit at the same time, and efficiently stores electric energy converted from solar energy and friction mechanical energy while realizing full self-power supply of the circuit.
4. The invention adopts a mode of acquiring the maximum power by matching the capacitance aiming at the management of the friction mechanical energy generation, and has good universality and practicability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a circuit diagram of a conventional peak power storage technique.
Fig. 2 is a circuit diagram of the maximum power storage technique of the present invention.
Fig. 3 is a circuit diagram associated with two types of power supply recombination management.
Fig. 4 is a power supply curve diagram of the dual energy storage unit C1 of the solar energy management circuit in the embodiment of the present invention.
Fig. 5 is a graph of the charging efficiency of the capacitor of the pulse energy power circuit for maximum power detection in accordance with the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 2, the pulse energy power circuit and the composite power circuit based on maximum power detection include the following steps:
pulse energy power supply circuit based on maximum power detection includes:
a rectifier circuit: the rectifier is used for connecting the pulse energy device and rectifying the power output by the pulse energy device;
the maximum power energy storage circuit: a primary energy storage device matched with the pulse energy device in impedance is connected to the rectification rear side of the rectification circuit and used for storing electric energy for continuous multi-cycle pulses and releasing the stored electric energy to the power supply energy storage circuit after the stored electric energy reaches the maximum output power and is controlled;
a sampling circuit N: the sampling circuit is used for sampling the maximum power energy storage circuit and then providing a sampling signal for the control circuit N;
reference power supply: the reference signal and the power supply are used for providing a reference signal and a power supply for the control circuit N;
a control circuit N: the sampling circuit is used for controlling the switch circuit N according to the sampling signal and the reference signal, outputting a control signal for controlling the switch circuit N to be switched on when the sampling signal is characterized in that the primary energy storage device is in a maximum power state, and outputting a control signal for controlling the switch circuit N to be switched off when the sampling signal is expressed in that the primary energy storage device is in a non-maximum power state;
a switching circuit N: used for controlling the connection or disconnection of the grounding loop of the power supply energy storage circuit N,
when the switch circuit N is switched on, the grounding loop of the power supply energy storage circuit N is switched on and is in a chargeable state, the maximum power energy storage circuit releases the stored energy to the power supply energy storage circuit N, and when the switch circuit N is switched off, the grounding loop of the power supply energy storage circuit N is switched off and is in a non-chargeable state, the maximum power energy storage circuit stores the stored energy;
and a power supply energy storage circuit N: for use as a power source for a load.
The design principle of the invention is as follows:
the maximum power energy storage circuit is directly arranged on the rectification rear side of the rectification circuit, continuously and continuously obtains pulse energy in multiple periods, multiple pulses are arranged in 1 period, thus the maximum power energy storage circuit can obtain enough power along with the accumulation of time, and the maximum power energy storage circuit releases electric energy to the power supply energy storage circuit N in the maximum power state. The sampling circuit N, the reference power supply, the control circuit N and the switch circuit N form a control loop. Therefore, all energy output by the pulse energy device is stored by the maximum power energy storage circuit and then is transferred to the power supply energy storage circuit N.
Compared with the prior art, the invention adopts the water vat theory to explain the difference between the two: the circuit of the invention is provided with 2 water cylinders corresponding to a maximum power energy storage circuit and a power supply energy storage circuit N; the maximum power energy storage circuit is used for continuously obtaining electric energy, and is equivalent to continuously obtaining water flow by 1 water cylinder; and opening the access valves until the water is about to overflow, and then transferring the electric energy to the power supply energy storage circuit N by the maximum power energy storage circuit, namely opening the water valve to transfer the water in the first water tank to the second water tank. In the prior art, although 2 capacitors are adopted, which are equivalent to 2 water tanks, the first capacitor C p The function of the switch is to drive the switch, and energy is not accumulated. I.e. to start the direct transfer of water to the second water vat at the peak of the water flow in the water vat.
The invention adopts the management of the maximum power energy storage method, so the control circuit N of the invention needs to provide a reference power supply by means of external power supply. In the application environment of the micro-motion power supply, the micro-motion power supply generally cannot depend on the commercial power supply. Therefore, button cells used for standby and the like can be selected, but when the button cells are applied to the power supply, after the operation time is long, voltage drop occurs, namely the reference voltage value of the reference power supply is reduced, and at the moment, the switching circuit N is conducted when the circuit is not at the initial set maximum power, so that the energy transmission efficiency is influenced. The invention also provides a composite design, namely, a pulse energy power circuit based on maximum power detection is combined with a solar energy power circuit, the solar energy power circuit independently generates a capacitor, and the independent capacitor provides a reference power supply for the control circuit N in a full-charge state; because the current required in the control circuit N is small and only tens of microamperes, the loss of the route is small, and the capacitor can keep high potential for a long time. Even after the loss, the loss of the capacitor can be supplemented by solar energy. Therefore, the whole system can obtain the composite power supply of 2 energy sources, and the pulse energy source device can continuously supply power to the system in a high-efficiency state.
In a preferred embodiment of the method of the invention,
the maximum power energy storage circuit comprises a capacitor Copt serving as a primary energy storage device; one end of the capacitor Copt is connected with the anode of the rectification rear side of the rectification circuit, and the other end of the capacitor Copt is connected with the cathode of the rectification rear side of the rectification circuit.
The sampling circuit N comprises a capacitor group consisting of a capacitor C3 and a capacitor C4 which are connected in series, one end of the capacitor group is connected with the anode of the rectification rear side of the rectification circuit, and the other end of the capacitor group is connected with the cathode of the rectification rear side of the rectification circuit; the serial connection point of the capacitor C3 and the capacitor C4 serves as a sampling point, and the serial connection point provides 1 sampling signal for the control circuit N.
The control circuit N comprises a comparator U2, and a power supply terminal of the comparator U2 is connected with a power supply provided by a reference power supply; the positive end of the comparator U2 is connected with the sampling signal provided by the sampling circuit N, the bias end of the comparator U2 is connected with the reference signal provided by the reference power supply, and the output end of the comparator U2 is connected with the switching circuit N.
The switch circuit N comprises an MOS tube Q2, the power supply and energy storage circuit N comprises a diode D2, an inductor L1 and a capacitor Cs,
the grid of the MOS tube Q2 is connected with a control signal of the control circuit N, the source electrode of the MOS tube Q2 is connected with the negative electrode of the rear side of rectification, the drain electrode of the MOS tube Q2 is connected with the negative electrode of the capacitor Cs and the positive electrode of the diode D2, the inductor L1 is connected with the capacitor Cs in series to form a secondary energy storage device, the diode D2 is connected with the secondary energy storage device in parallel, and the negative electrode of the diode D2 is connected with the inductor L1 and the positive electrode of the rear side of rectification.
The rectifying circuit comprises a full-bridge rectifying circuit Z; the reference power supply is a button power supply or external direct current power supply; the pulse energy device is a nano friction generator TENG.
The capacitance Copt is equivalent to: and the first-stage energy storage unit is used for being matched with the partial impedance of the friction mechanical energy power supply to obtain the maximum output power. The capacitor C3 and the capacitor C4 are used for voltage division and providing a reference voltage at the positive end of the input voltage comparator U2, the resistor R4 (megaohm level) and the resistor R5 are used for voltage division and providing a reference voltage at the negative end (bias level) of the input voltage comparator U2, and an output signal of the voltage comparator is used for controlling the electronic switch MOS. And the diode D2, the inductor L and the energy storage unit Cs form a second-stage energy storage unit.
Specifically, during operation:
the rectification circuit is in bridge type full wave rectification and is connected to the output rear end of the nano friction generator TENG to convert alternating current output by the nano friction generator into direct current.
The first-stage energy storage unit is a capacitor Copt which is in impedance matching with the nano friction generator and is used for obtaining the maximum output power of the nano friction generator.
The control and switch circuit part comprises a capacitor C3, a capacitor C4, a resistor R5, a voltage comparator U2 and an MOS (metal oxide semiconductor) transistor Q2. A capacitor C3 and a capacitor C4 are connected in parallel to divide the voltage at two ends of the Copt to provide a positive input reference voltage for a voltage comparator U2, a resistor R4 and a resistor R5 divide the voltage to provide a negative input reference voltage for the voltage comparator U2, when the voltage of the capacitor Copt of the first-stage energy storage unit rises to a preset value, the voltage comparator U2 outputs a high level to enable the MOS tube Q2 to be conducted, the drain electrode and the source electrode are conducted at the moment, the capacitor Cs is in a chargeable state, and the energy stored by the capacitor Copt of the first-stage energy storage unit is released to the capacitor Cs of the second-stage energy storage unit. The second-stage energy storage unit also comprises an inductor L1 and a diode D2. When the MOS transistor Q2 is turned on, the process of transferring the energy stored in the first stage energy storage unit to the second stage energy storage unit mainly includes two stages, the first stage: when the MOS tube Q2 is conducted, energy is firstly stored in the inductor L1 and the capacitor Cs from the capacitor Copt, and in the second stage: when the MOS tube Q2 is disconnected, the energy stored by the inductor L1 is released to the capacitor Cs through the diode D2; thereby completing the entire energy storage process.
Preferably, the energy storage device capacitor C1, the capacitor C2, and the capacitor Cs are any one of an energy storage capacitor, a super capacitor, and a rechargeable battery.
Example 2
As shown in fig. 3, the hybrid power supply circuit includes a pulse energy power supply circuit and a solar energy power supply circuit;
the pulse energy power supply circuit includes: a pulse energy power circuit based on maximum power detection;
the solar energy power supply circuit includes:
a voltage reduction circuit M: the power supply is used for being connected with the solar energy device SC and reducing the voltage of the power supply output by the solar energy device SC;
the power supply energy storage circuit M: the voltage reduction rear side connected with the voltage reduction circuit M stores electric energy, and the electric energy is used as an energy supply power supply of a load and a reference power supply of a pulse energy power supply circuit based on maximum power detection to provide direct power supply;
control tank circuit M: the reference power supply is connected with the voltage reduction rear side of the voltage reduction circuit M and used for providing auxiliary power supply as the reference power supply of the pulse energy power supply circuit based on maximum power detection;
sampling circuit M1: is used for sampling the voltage-reduced side of the voltage-reducing circuit M to obtain a first sampling signal,
the sampling circuit M2: for sampling the control tank circuit M to obtain a second sampling signal,
the control circuit M: the control circuit is used for outputting a control signal according to the first sampling signal and the second sampling signal, outputting a control signal for controlling the switch circuit M to be switched on when the first sampling signal is higher than the second sampling signal, and outputting a control signal for controlling the switch circuit M to be switched off when the first sampling signal is lower than the second sampling signal;
the switching circuit M: for controlling the conduction or the disconnection of the ground circuit of the tank circuit M for control,
when the switch circuit M is conducted, the grounding loop of the energy storage circuit M for control is conducted and is in a charging state, the voltage reduction circuit M charges the energy storage circuit M for control, and at the moment, the energy storage circuit M for power supply is used as a reference power supply of the pulse energy power circuit based on maximum power detection to provide direct power supply;
when the switch circuit M is turned off, the ground circuit of the control energy storage circuit M is turned off and is in a discharge state, and at this time, the control energy storage circuit M supplies auxiliary power as a reference power supply of the pulse energy power supply circuit based on maximum power detection.
The solar energy power supply circuit comprises:
the power supply energy storage circuit M comprises a capacitor C1, the energy storage circuit M for control comprises a capacitor C2,
the capacitor C1 and the capacitor C2 are connected in parallel at the voltage reduction rear side of the voltage reduction circuit M, and the anode of the capacitor C2 and the anode of the capacitor C1 are connected and connected in parallel to form a reference power supply required by the pulse energy power supply circuit based on maximum power detection;
the sampling circuit M1 comprises a resistor R1 and a resistor R2 which are connected in series, and a resistor formed by connecting the resistor R1 and the resistor R2 in series is connected in series and in parallel with the voltage reduction rear side of the voltage reduction circuit M; a first sampling signal is led out from a serial node of the resistor R1 and the resistor R2;
the sampling circuit M2 comprises a resistor R3 and a diode D1 which are connected in series, and the resistor R3 and the diode D1 are connected in series and then connected with a capacitor C2 in parallel; a second sampling signal is led out from a node where the cathode of the diode D1 is connected with the resistor R3;
the control circuit M comprises a comparator U1, a first sampling signal is introduced into the positive end of the comparator U1, a second sampling signal is introduced into the offset end of the comparator U1, and the power supply terminal of the comparator U1 is connected with the voltage reduction rear side of the voltage reduction circuit M;
the switching circuit M comprises an MOS tube Q2, the grid electrode of the MOS tube Q2 is connected with the output end of the comparator U1, the source electrode of the MOS tube Q2 is grounded, and the drain electrode of the MOS tube Q2 is connected with the cathode of the capacitor C2 and the anode of the diode D1.
The pulse energy power supply circuit based on maximum power detection comprises: the device comprises a rectifying circuit, a sampling circuit N, a control circuit N, a switching circuit N and a power supply energy storage circuit N;
the maximum power energy storage circuit comprises a capacitor Copt serving as a primary energy storage device; one end of the capacitor Copt is connected with the positive electrode of the rectification rear side of the rectification circuit, and the other end of the capacitor Copt is connected with the negative electrode of the rectification rear side of the rectification circuit.
The sampling circuit N comprises a capacitor group consisting of a capacitor C3 and a capacitor C4 which are connected in series, one end of the capacitor group is connected with the anode of the rectification rear side of the rectification circuit, and the other end of the capacitor group is connected with the cathode of the rectification rear side of the rectification circuit; the serial connection point of the capacitor C3 and the capacitor C4 is used as a sampling point, and the serial connection point provides 1 sampling signal for the control circuit N.
The control circuit N comprises a comparator U2, and a power supply terminal of the comparator U2 is connected with a power supply provided by the connection and parallel connection of the anode of the capacitor C2 and the anode of the capacitor C1; the positive end of the comparator U2 is connected with a sampling signal provided by the sampling circuit N, the bias end of the comparator U2 is connected with the reference signal provided by the parallel connection of the positive electrode of the capacitor C2 and the positive electrode of the capacitor C1, and the output end of the comparator U2 is connected to the switching circuit N.
The switch circuit N comprises an MOS tube Q2, the power supply and energy storage circuit N comprises a diode D2, an inductor L1 and a capacitor Cs,
the grid of the MOS tube Q2 is connected with a control signal of the control circuit N, the source of the MOS tube Q2 is connected with the negative electrode of the rectification rear side, the drain of the MOS tube Q2 is connected with the negative electrode of the capacitor Cs and the positive electrode of the diode D2, the inductor L1 is connected with the capacitor Cs in series to form a secondary energy storage device, the diode D2 is connected with the secondary energy storage device in parallel, and the negative electrode of the diode D2 is connected with the inductor L1 and the positive electrode of the rectification rear side.
The pulse energy device is a nano friction generator TENG; the capacitor Cs and the capacitor C1 are the same capacitor or independent capacitors.
The voltage reduction circuit M is used for stabilizing the output voltage of the solar energy, one part of energy in the solar energy power supply circuit is used for supplying power and circuit bias to a comparator U2 in the pulse energy power supply circuit based on maximum power detection, and the other part of energy is used for supplying power to a load. The solar energy power supply circuit comprises two energy storage units, namely a capacitor C1 and a capacitor C2, wherein the capacitor C2 is used for supplying power to the comparator U2 and biasing the circuit, so that the whole circuit can realize self-power supply, and the capacitor C1 is used for supplying power to a load.
Preferably, a resistor R1 and a resistor R2 in the solar energy power supply circuit are connected in series and divided and then input to the positive end of the comparator U1 to detect the output voltage after the solar energy is stabilized, and preferably, the resistor R3 and the low-power-consumption voltage reference chip D1 are used to provide a negative reference voltage of the voltage comparator U1. The comparator U1 outputs a control signal to control the switch, so that the charging of the two energy storage units is controlled.
Specifically, the voltage reducing circuit M is a switching type dc boost voltage stabilizing circuit, and is connected to the output of the solar energy to stabilize the output voltage to a set value of 5V. When the output voltage after the solar voltage stabilization reaches a set value, the energy storage unit capacitor C1 and the energy storage unit capacitor C2 are charged with energy at the same time when the solar energy is output, and power is supplied to the comparator U2. When the output of the solar energy after voltage stabilization does not reach the set value, the energy storage unit capacitor C2 supplies power to the voltage comparator U2.
Experimental verification and analysis:
referring to fig. 4, a power supply curve diagram of the energy storage unit of the solar energy partial energy management circuit supplying power to the comparator of the circuit is shown, and the energy storage unit is a capacitor with C1 being 1 mF. The capacitor C1 of 1mF is charged to 5V by solar energy, then the comparator is supplied with power under the state that the energy management circuit of the friction generator continuously works, after the energy is supplied for 14s, the voltage of the capacitor C2 is slightly reduced, and the circuit can be always kept working.
Referring to fig. 5, in order to supply power with 1mF energy storage capacitor, the nano friction generator is used to charge the voltage of two energy storage capacitors through the energy management circuit and the circuit conversion efficiency. By controlling the voltage dividing capacitors C3 and C4 and R5, the electric energy of the first-stage energy storage capacitor Copt can be controlled to be released to the next-stage capacitor Cs when the first-stage energy storage capacitor Copt reaches a certain set voltage. Referring to fig. 5, the circuit can transfer the capacitance Copt to the capacitance Cs more efficiently for comparison of the transfer efficiency of the circuit at several different values set. Therefore, the circuit designed by the invention can manage the energy generated by the friction generator and the solar energy more efficiently.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. The composite power supply circuit is characterized by comprising a pulse energy power supply circuit and a solar energy power supply circuit;
the pulse energy power supply circuit includes: a pulse energy power supply circuit based on maximum power detection;
the pulse energy power supply circuit based on maximum power detection comprises:
a rectifier circuit: the rectifier is used for connecting the pulse energy device and rectifying the power output by the pulse energy device;
the maximum power energy storage circuit: a primary energy storage device matched with the pulse energy device in impedance is connected to the rectification rear side of the rectification circuit and used for storing electric energy for continuous multi-cycle pulses and releasing the stored electric energy to a power supply energy storage circuit after the stored electric energy is controlled when the stored electric energy reaches the maximum output power;
a sampling circuit N: the sampling circuit is used for sampling the maximum power energy storage circuit and then providing a sampling signal for the control circuit N;
reference power supply: the reference signal and the power supply are used for providing a reference signal and a power supply for the control circuit N;
a control circuit N: the sampling circuit is used for controlling the switching circuit N according to the sampling signal and the reference signal, outputting a control signal for controlling the switching circuit N to be switched on when the sampling signal is characterized in that the primary energy storage device is in a maximum power state, and outputting a control signal for controlling the switching circuit N to be switched off when the sampling signal is expressed in that the primary energy storage device is in a non-maximum power state;
a switching circuit N: used for controlling the connection or disconnection of the grounding loop of the power supply energy storage circuit N,
when the switch circuit N is switched on, the grounding loop of the power supply energy storage circuit N is switched on and is in a chargeable state, the maximum power energy storage circuit releases the stored energy to the power supply energy storage circuit N, and when the switch circuit N is switched off, the grounding loop of the power supply energy storage circuit N is switched off and is in a non-chargeable state, the maximum power energy storage circuit stores the stored energy;
and a power supply energy storage circuit N: an energy supply source for acting as a load;
the maximum power energy storage circuit comprises a capacitor Copt serving as a primary energy storage device; one end of the capacitor Copt is connected with the anode of the rectification rear side of the rectification circuit, and the other end of the capacitor Copt is connected with the cathode of the rectification rear side of the rectification circuit;
the control circuit N comprises a comparator U2, and a power supply terminal of the comparator U2 is connected with a power supply provided by a reference power supply; the positive end of the comparator U2 is connected with a sampling signal provided by the sampling circuit N, the bias end of the comparator U2 is connected with a reference signal provided by a reference power supply, and the output end of the comparator U2 is connected to the switch circuit N;
the solar energy power supply circuit comprises:
a voltage reduction circuit M: the power supply is used for being connected with the solar energy device SC and reducing the voltage of the power supply output by the solar energy device SC;
a power supply energy storage circuit M: the voltage reduction rear side connected with the voltage reduction circuit M stores electric energy, and the electric energy is used as an energy supply power supply of a load and a reference power supply of a pulse energy power supply circuit based on maximum power detection to provide direct power supply;
control tank circuit M: the reference power supply is connected with the voltage reduction rear side of the voltage reduction circuit M and used for providing auxiliary power supply as the reference power supply of the pulse energy power supply circuit based on maximum power detection;
sampling circuit M1: is used for sampling the voltage-reduced side of the voltage-reducing circuit M to obtain a first sampling signal,
the sampling circuit M2: for sampling the control tank circuit M to obtain a second sampling signal,
the control circuit M: the control circuit is used for outputting a control signal according to the first sampling signal and the second sampling signal, outputting a control signal for controlling the switch circuit M to be switched on when the first sampling signal is higher than the second sampling signal, and outputting a control signal for controlling the switch circuit M to be switched off when the first sampling signal is lower than the second sampling signal;
the switching circuit M: for controlling the conduction or the disconnection of the ground loop of the tank circuit M for control,
when the switching circuit M is conducted, the grounding loop of the energy storage circuit M for control is conducted and is in a charging state, the voltage reduction circuit M charges the energy storage circuit M for control, and at the moment, the energy storage circuit M for power supply is used as a reference power supply of the pulse energy power supply circuit based on maximum power detection to provide direct power supply;
when the switch circuit M is turned off, the ground loop of the control energy storage circuit M is turned off and is in a discharge state, and at this time, the control energy storage circuit M provides auxiliary power as a reference power supply of the pulse energy power supply circuit based on maximum power detection.
2. The hybrid power supply circuit according to claim 1,
the sampling circuit N comprises a capacitor group consisting of a capacitor C3 and a capacitor C4 which are connected in series, one end of the capacitor group is connected with the anode of the rectification rear side of the rectification circuit, and the other end of the capacitor group is connected with the cathode of the rectification rear side of the rectification circuit; the serial connection point of the capacitor C3 and the capacitor C4 serves as a sampling point, and the serial connection point provides 1 sampling signal for the control circuit N.
3. The hybrid power supply circuit according to claim 1,
the switch circuit N comprises an MOS tube Q2, the power supply and energy storage circuit N comprises a diode D2, an inductor L1 and a capacitor Cs,
the grid of the MOS tube Q2 is connected with a control signal of the control circuit N, the source electrode of the MOS tube Q2 is connected with the negative electrode of the rear side of rectification, the drain electrode of the MOS tube Q2 is connected with the negative electrode of the capacitor Cs and the positive electrode of the diode D2, the inductor L1 is connected with the capacitor Cs in series to form a secondary energy storage device, the diode D2 is connected with the secondary energy storage device in parallel, and the negative electrode of the diode D2 is connected with the inductor L1 and the positive electrode of the rear side of rectification.
4. The hybrid power supply circuit according to claim 1,
the rectifying circuit comprises a full-bridge rectifying circuit Z; the reference power supply is a button power supply or external direct current power supply; the pulse energy device is a nano friction generator TENG.
5. The hybrid power supply circuit according to claim 1,
the solar energy power supply circuit includes:
the power supply energy storage circuit M comprises a capacitor C1, the energy storage circuit M for control comprises a capacitor C2,
the capacitor C1 and the capacitor C2 are connected in parallel at the voltage reduction rear side of the voltage reduction circuit M, and the anode of the capacitor C2 and the anode of the capacitor C1 are connected and connected in parallel to form a reference power supply required by the pulse energy power supply circuit based on maximum power detection;
the sampling circuit M1 comprises a resistor R1 and a resistor R2 which are connected in series, and a resistor formed by connecting the resistor R1 and the resistor R2 in series is connected in series and in parallel with the voltage reduction rear side of the voltage reduction circuit M; a first sampling signal is led out from a serial node of the resistor R1 and the resistor R2;
the sampling circuit M2 comprises a resistor R3 and a diode D1 which are connected in series, and the resistor R3 and the diode D1 are connected in series and then connected with a capacitor C2 in parallel; a second sampling signal is led out from a node where the cathode of the diode D1 is connected with the resistor R3;
the control circuit M comprises a comparator U1, a first sampling signal is introduced into the positive end of the comparator U1, a second sampling signal is introduced into the offset end of the comparator U1, and the power supply terminal of the comparator U1 is connected with the voltage reduction rear side of the voltage reduction circuit M;
the switching circuit M comprises an MOS tube Q2, the grid electrode of the MOS tube Q2 is connected with the output end of the comparator U1, the source electrode of the MOS tube Q2 is grounded, and the drain electrode of the MOS tube Q2 is connected with the cathode of the capacitor C2 and the anode of the diode D1.
6. The hybrid power supply circuit according to claim 5,
the pulse energy power supply circuit based on maximum power detection comprises: the device comprises a rectifying circuit, a sampling circuit N, a control circuit N, a switching circuit N and a power supply energy storage circuit N;
the maximum power energy storage circuit comprises a capacitor Copt serving as a primary energy storage device; one end of the capacitor Copt is connected with the positive electrode of the rectification rear side of the rectification circuit, and the other end of the capacitor Copt is connected with the negative electrode of the rectification rear side of the rectification circuit;
the sampling circuit N comprises a capacitor bank formed by a capacitor C3 and a capacitor C4 which are connected in series, one end of the capacitor bank is connected with the anode of the rectification rear side of the rectification circuit, and the other end of the capacitor bank is connected with the cathode of the rectification rear side of the rectification circuit; the serial connection point of the capacitor C3 and the capacitor C4 is used as a sampling point, and the serial connection point provides 1 sampling signal for the control circuit N;
the control circuit N comprises a comparator U2, and a power supply terminal of the comparator U2 is connected with a power supply provided by the connection and parallel connection of the anode of the capacitor C2 and the anode of the capacitor C1; the positive end of the comparator U2 is connected with a sampling signal provided by the sampling circuit N, the bias end of the comparator U2 is connected with the positive electrode of the capacitor C2 and the positive electrode of the capacitor C1 and is connected with a reference signal provided by parallel connection, and the output end of the comparator U2 is connected with the switching circuit N;
the switch circuit N comprises an MOS tube Q2, the power supply and energy storage circuit N comprises a diode D2, an inductor L1 and a capacitor Cs,
the grid of the MOS tube Q2 is connected with a control signal of the control circuit N, the source of the MOS tube Q2 is connected with the negative electrode of the rectification rear side, the drain of the MOS tube Q2 is connected with the negative electrode of the capacitor Cs and the positive electrode of the diode D2, the inductor L1 is connected with the capacitor Cs in series to form a secondary energy storage device, the diode D2 is connected with the secondary energy storage device in parallel, and the negative electrode of the diode D2 is connected with the inductor L1 and the positive electrode of the rectification rear side.
7. The hybrid power supply circuit according to claim 6,
the pulse energy device is a nano friction generator TENG; the capacitor Cs and the capacitor C1 are the same capacitor or independent capacitors.
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CN106602687A (en) * 2015-10-19 2017-04-26 北京纳米能源与系统研究所 Energy management method, circuit and device for friction nano-generators
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CN111030274A (en) * 2019-12-30 2020-04-17 上海交通大学 Weak piezoelectric energy collector power management circuit adopting high-Q-value inductance energy storage
CN111740485A (en) * 2020-07-06 2020-10-02 电子科技大学 Pulse type micro-energy power supply management circuit based on passive peak detection

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FR3030157A1 (en) * 2014-12-15 2016-06-17 Commissariat Energie Atomique CIRCUIT FOR COMPARING A VOLTAGE AT A THRESHOLD
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CN106602687A (en) * 2015-10-19 2017-04-26 北京纳米能源与系统研究所 Energy management method, circuit and device for friction nano-generators
CN108292898A (en) * 2015-12-03 2018-07-17 皇家飞利浦有限公司 Energy production system and method
CN111030274A (en) * 2019-12-30 2020-04-17 上海交通大学 Weak piezoelectric energy collector power management circuit adopting high-Q-value inductance energy storage
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