CN115589163A - Variable-frequency low-frequency vibration energy acquisition management system - Google Patents

Variable-frequency low-frequency vibration energy acquisition management system Download PDF

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Publication number
CN115589163A
CN115589163A CN202211094596.7A CN202211094596A CN115589163A CN 115589163 A CN115589163 A CN 115589163A CN 202211094596 A CN202211094596 A CN 202211094596A CN 115589163 A CN115589163 A CN 115589163A
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China
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energy
circuit
input end
output end
signal
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CN202211094596.7A
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Inventor
韦甜柳
李巍巍
周强
孙建超
邱弈茗
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China South Power Grid International Co ltd
Shandong University of Technology
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China South Power Grid International Co ltd
Shandong University of Technology
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Priority to CN202211094596.7A priority Critical patent/CN115589163A/en
Publication of CN115589163A publication Critical patent/CN115589163A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/16—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of frequency
    • 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
    • H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

A variable-frequency low-frequency vibration energy acquisition management system belongs to the field of energy acquisition management circuits. The energy input end of the control circuit (2) is connected with the energy output end of the energy acquisition main circuit (1), and the signal output end of the control circuit (2) is connected with the signal input end of the energy acquisition main circuit (1); the energy output end of the energy collector (3) controls the energy input end of the circuit (2) and the energy input end of the isolation transformer (8) at the same time, the energy output end of the isolation transformer (8) is connected with the energy storage module after being connected with the rectifying circuit (5) in series, and the energy output end of the isolation transformer (8) is also connected with a flyback conversion circuit (10) used for supplying power to a direct-current load. The invention enables the energy collector to output more electric energy and realizes the maximum power tracking of the energy collector. The energy storage module can realize energy storage, thereby driving a load or a wireless sensor network node.

Description

Frequency conversion type low-frequency vibration energy acquisition management system
Technical Field
A variable-frequency low-frequency vibration energy acquisition management system belongs to the field of energy acquisition management circuits.
Background
With the development of sensors, microelectronics and nanotechnology, low-power consumption micro wireless sensor networks have been widely applied to various detection fields, in the practical application process, a hardware circuit responsible for signal processing and wireless transmission and the sensors are integrally designed to form wireless sensor network nodes, and the nodes need to be powered by batteries when working normally. In order to solve the problem, an energy harvester is adopted to convert vibration energy in the environment into electric energy at present, but because the electric energy generated by the energy harvester is an alternating current signal and the output energy is weak, an energy harvesting management circuit matched with the energy harvester needs to be designed to realize conversion and storage of the output energy of the energy harvester.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the variable-frequency low-frequency vibration energy acquisition management system capable of storing energy so as to drive a load or a wireless sensor network node is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: this frequency conversion formula low frequency vibration energy gathers management system, its characterized in that: the energy collection device comprises an energy collection main circuit and a control circuit, wherein an energy input end of the control circuit is connected and conducted with an energy output end of the energy collection main circuit, and a signal output end of the control circuit is connected with a signal input end of the energy collection main circuit;
the energy collecting main circuit comprises an energy collector, an isolation transformer, a sorting circuit and an energy storage module, wherein the energy output end of the energy collector controls the energy input end of the circuit and the energy input end of the isolation transformer simultaneously, a control switch module is arranged between the energy collector and the isolation transformer, the energy output end of the isolation transformer is connected with the energy storage module after being connected with a rectifying circuit in series, the energy output end of the isolation transformer is also connected with a flyback conversion circuit for supplying power to a direct-current load, a power supply switch module is arranged between the energy output end of the isolation transformer and the energy input end of the flyback conversion circuit, and the signal output end of the control circuit is connected with the signal input end of the control switch module and the signal input end of the power supply switch module simultaneously.
Preferably, the energy collector comprises a voltage source and a collecting capacitor, two electrodes of the voltage source are respectively communicated with two ends of the collecting capacitor, and two ends of the voltage source are simultaneously connected with the energy input end of the isolation transformer and the energy input end of the control circuit.
Preferably, the control switch module comprises a signal control switch, and the power supply switch module is a power supply switch.
Preferably, the control circuit comprises a switch control circuit and a pulse output circuit; the energy output end of the energy collector is simultaneously connected with the energy input end of the switch control circuit and the energy input end of the pulse output circuit, the signal output end of the pulse output circuit is simultaneously connected with the signal input end of the switch control circuit and the signal input end of the power supply switch module, and the signal output end of the switch control circuit is connected with the signal input end of the control switch module.
Preferably, the power supply switch module includes a power supply switch controller and a power supply switch actuator, a signal input end of the power supply switch controller is connected with a signal output end of the pulse output circuit, a signal output end of the power supply switch controller is connected with a signal input end of the power supply switch actuator, and the power supply switch actuator is arranged between an energy output end of the rectification circuit and an energy input end of the flyback conversion circuit.
Preferably, the control circuit further comprises a capacitive energy detection circuit, a detection end of the capacitive energy detection circuit is connected with the energy storage module, and a signal output end of the capacitive energy detection circuit is connected with a signal input end of the pulse output circuit.
Preferably, the control circuit further comprises an AC-DC circuit, an energy input end of the AC-DC circuit is connected with an energy output end of the energy collector, and an energy input end of the AC-DC circuit is connected with an energy input end of the switch control circuit and an energy input end of the pulse output circuit.
Preferably, the switch control circuit comprises a voltage maximum value detection circuit and a control signal generation circuit, an input end of the voltage maximum value detection circuit is connected with an energy output end of the energy collector, a signal input end of the control signal generation circuit is connected with a signal input end of the voltage maximum value detection circuit, and a signal output end of the control signal generation circuit is connected with a signal input end of the control switch module.
Preferably, the voltage maximum detection circuit comprises a first comparator, a power supply port of the first comparator is connected with an energy output end of the energy collector, a grounding end of the first comparator is grounded, and an output end of the first comparator is connected with a signal input end of the control signal generation circuit.
Preferably, the control signal generating circuit includes a second comparator, a power supply port of the second comparator is connected to the energy output end of the energy collector, a ground terminal of the second comparator is grounded, and an output end of the second comparator is connected to the signal input end of the switch control circuit.
Compared with the prior art, the invention has the following beneficial effects:
the variable-frequency low-frequency vibration energy acquisition management system changes the low-frequency signal output by the energy collector into a high-frequency signal, so that a matching loop formed by the energy collector, the switch and the primary winding of the isolation transformer can realize high-frequency resonance, the high-frequency resonance can be realized by selecting a smaller inductor at the moment, impedance matching is met, the maximum power output of the energy collector is realized, and the reduction of the inductance value means that the isolation transformer with a smaller volume can be selected; due to the mutual inductance of the isolation transformer, a loop formed by the secondary winding inductance of the transformer, the rectifying circuit and the energy storage module can also generate high-frequency resonance, so that higher power output and higher energy conversion efficiency are obtained; the switch control circuit can detect the maximum value of the output voltage of the energy collector and control the switch action at the maximum value, so that more electric energy is output by the energy collector, and the maximum power tracking of the energy collector is realized. The energy storage module can realize energy storage, thereby driving a load or a wireless sensor network node.
Drawings
Fig. 1 is a circuit diagram of a variable frequency low frequency vibration energy harvesting management system.
Fig. 2 is a circuit diagram of a variable frequency switch constructed by a MOS device.
Fig. 3 is a logic diagram of a switch control circuit.
Fig. 4 is a circuit diagram of the switch control.
Fig. 5 is a circuit diagram of the pulse output circuit.
Fig. 6 is a circuit diagram of a column flyback converter circuit.
In the figure: 1. the device comprises an energy collection main circuit 2, a control circuit 3, an energy collector 4, a signal control switch 5, a rectifying circuit 6, a collection capacitor 8, an isolation transformer 9, an energy storage capacitor 10, a flyback conversion circuit 11, a power supply switch actuator 12, an AC-DC circuit 13, a switch control circuit 14, a pulse output circuit 15, a capacitor energy detection circuit 16, a power supply switch controller 17, a first MOS switch 18, a second MOS switch 19, a diode 20, a voltage maximum value detection circuit 21, a control signal generation circuit 22, a first resistor 23, a second comparator 24, a second resistor 25, a maximum value detection capacitor 26, a first comparator 27, a suppression signal generation capacitor 28, a third resistor 29, a fourth resistor 30, a third comparator 31, a fourth comparator 32, a fifth comparator 33 and a high-Q-value transformer.
Detailed Description
Fig. 1 to 6 show preferred embodiments of the present invention, and the present invention will be further described with reference to fig. 1 to 6.
As shown in fig. 1: the frequency conversion type low-frequency vibration energy acquisition management system comprises an energy acquisition main circuit 1 and a control circuit 2, wherein the energy input end of the control circuit 2 is connected and conducted with the energy output end of the energy acquisition main circuit 1, and the signal output end of the control circuit 2 is connected with the signal input end of the energy acquisition main circuit 1. The energy collection main circuit 1 comprises an energy collector 3, an isolation transformer 8, a sorting circuit 5 and an energy storage module, wherein the energy output end of the energy collector 3 simultaneously controls the energy input end of the circuit 2 and the energy input end of the isolation transformer 8, a control switch module is arranged between the energy collector 3 and the isolation transformer 8, the energy output end of the isolation transformer 8 is connected with the energy storage module after being connected with a rectification circuit 5 in series, the energy output end of the isolation transformer 8 is also connected with a flyback conversion circuit 10 for supplying power to a direct-current load, a power supply switch module is arranged between the energy output end of the isolation transformer 8 and the energy input end of the flyback conversion circuit 10, and the signal output end of the control circuit 2 is simultaneously connected with the signal input end of the control switch module and the signal input end of the power supply switch module.
The variable-frequency low-frequency vibration energy collection management system changes the low-frequency signals output by the energy collector 3 into high-frequency signals, so that a matching loop formed by the energy collector 3, the switch and the primary winding of the isolation transformer 8 can realize high-frequency resonance, the high-frequency resonance can be realized by selecting smaller inductance at the moment, the impedance matching is met, the maximum power output of the energy collector 3 is realized, and the reduction of the inductance value means that the isolation transformer 8 with smaller volume can be selected; due to the mutual inductance of the isolation transformer 8, a loop formed by the transformer secondary winding inductor, the rectifying circuit 5 and the energy storage module can also generate high-frequency resonance, so that higher power output and higher energy conversion efficiency are obtained; the switch control circuit 13 can detect the maximum value of the output voltage of the energy collector and control the switching action at the maximum value, so that more electric energy is output by the energy collector 3, and the maximum power tracking of the energy collector 3 is realized. The energy storage module can realize energy storage, thereby driving a load or a wireless sensor network node.
In this embodiment, the energy collector 3 includes a voltage source and a collecting capacitor 6, two electrodes of the voltage source are respectively communicated with two ends of the collecting capacitor 6, and two ends of the voltage source are simultaneously connected with the energy input end of the isolation transformer 8 and the energy input end of the control circuit 2. The energy harvester 3 can convert the vibration energy in the environment into the electric energy with the same frequency change and store the electric energy in the capacitor 6, so that the electric energy converted by the energy harvester 3 is an electric signal with low frequency. In order to extract the energy stored in the acquisition capacitor 6, an inductor is required to be connected with the energy collector 3 in series to form a matching circuit, and the energy in the acquisition capacitor 6 is acquired into the inductor when the circuit resonates. A diode D1 is also provided between the rectifier circuit 5 and the power supply switch module.
In this embodiment, the control switch module includes a signal control switch 4, and the power supply switch module is a power supply switch.
In order to obtain the maximum output power and realize the impedance matching of the loop, the signal output by the voltage source needs to be converted into a high-frequency signal, so that a switch frequency conversion circuit is formed in a mode that a nonlinear device signal control switch 4 is connected with a primary winding inductor L1 of an isolation transformer 8 in series. The isolation transformer 8 transfers the energy stored in the inductor L1 to the secondary winding inductor L2 through mutual inductance, when the voltage at two ends of the inductor L2 is greater than the conduction voltage of the diode D1, a loop formed by the secondary winding inductor, the rectifying circuit 5 and the energy storage module generates resonance, the resonance frequency is the same as the resonance frequency of the loop where the primary winding of the transformer is located, and the energy in the inductor L2 is finally transferred to the energy storage module at the moment, so that the primary energy collection process is completed. In this embodiment, the energy storage module is an energy storage capacitor 9.
The control circuit 2 includes an AC-DC circuit 12, a switch control circuit 13, a pulse output circuit 14, and a capacitive energy detection circuit 15. The energy input end of the AC-DC circuit 12 is connected with the energy output end of the energy collector 3, the energy output end of the AC-DC circuit 12 is simultaneously connected with the energy input end of the switch control circuit 13 and the energy input end of the pulse output circuit 14, the signal output end of the pulse output circuit 14 is connected with the signal input end of the power supply switch controller 16 and the signal input end of the switch control circuit 13, the signal output end of the power supply switch controller 16 is connected with the signal input end of the power supply switch actuator 11, the power supply switch actuator 11 is arranged between the rectification circuit 5 and the flyback conversion circuit 10, and the signal output end of the switch control circuit 13 is connected with the signal input end of the signal control switch 4. The input end of the capacitance energy detection circuit 15 is connected with two ends of the energy storage capacitor 9, and the signal output end of the capacitance energy detection circuit 15 is connected with the signal input end of the pulse output circuit 14.
In this embodiment, the switch control circuit 13 can detect the voltage output by the energy harvester 3, and when the output voltage reaches the maximum value, a control signal is generated to control the switch 4 to be turned on, and at this time, the energy harvesting management circuit can obtain the maximum power from the energy harvester 3; the switch control circuit 13 determines the turn-off time of the switch control signal according to the resonant frequency of the matching loop, so that the change of the resonant frequency of the matching loop can be realized by changing the duty ratio of the control signal, the switch control circuit 13 can obtain circuit starting electric energy from the energy collector 3 through the AD-DC circuit 12 so as to realize self power supply, the energy is completely provided by the energy collector 3, and an auxiliary power supply is not required to be designed. The control circuit 2 can monitor the electric quantity of the energy storage capacitor 9 through the capacitor energy detection circuit 15, when the energy of the energy storage capacitor 9 is enough, the trigger pulse output circuit 14 controls the power supply switch actuator 11 to be conducted, and at the moment, the energy of the energy storage capacitor 9 realizes the power supply of the direct current load through the flyback conversion circuit 10.
As shown in fig. 2: the signal control switch 4 is a two-switch frequency conversion circuit constructed by MOS devices, and the switch control circuit 13 includes a first MOS switch 17, a second MOS switch 18, and a diode 19, where the diode 19 includes a diode D5 and a diode D6. The grid voltage input end of the first MOS switch 17 is In1, the grid voltage input end of the second MOS switch 18 is In2, the source of the first MOS switch 17 is connected with the source of the second MOS switch 18 and is simultaneously connected with GND, the drain end of the first MOS switch 17 is connected with the output end V1 of the energy collector 3, the drain of the second MOS switch 18 is connected with the V2 end connected with the other end output of the energy collector through the inductor L1, the diode D5 is connected with the first MOS switch 17 In parallel, the diode D6 is connected with the second MOS switch 18 In parallel, and the four devices have the same connecting end GND.
As shown in fig. 3: the switch control circuit 13 comprises a voltage maximum value detection circuit 20 and a control signal generation circuit 21, the voltage maximum value detection circuit 20 introduces the output voltage V of the energy collector 3 to realize the detection of the maximum voltage value, and when the voltage maximum value occurs, the control signal generation circuit 21 can output a control signal with adjustable duty ratio. In this embodiment, the V + port supplies power to the circuit, so that the V + port and the V port can be short-circuited, and the energy harvester 3 can completely supply power to the switch control circuit 13.
As shown in fig. 4: the maximum voltage detecting circuit 20 includes a second resistor 24, a maximum value detecting capacitor 25, and a first comparator 26, a power supply port of the first comparator 26 is V +, i.e., V + port in fig. 3, a ground terminal of the first comparator 26 is GND, and when the voltage V reaches a maximum value, the first comparator 26 outputs a high level signal to the control signal generating circuit 23. One end of the second resistor 24 is connected to the port V, the other end is connected to a terminal of the first comparator 26, one end of the second resistor 24 is connected to a + terminal of the first comparator 26, one end of the maximum value detection capacitor 25 is connected to one end of the second resistor 24 or the + terminal of the first comparator 26, and the other end is a ground GND.
The control signal generating circuit 21 includes a direct signal generating capacitor 27, a first resistor 22, a third resistor 28, a fourth resistor 29, and a second comparator 23, a power supply port of the second comparator 23 is V +, that is, a V + port In fig. 3, a signal output terminal of the second comparator 27 is In, the signal output terminal of the second comparator 27 is In, and the signal output terminal of the second comparator 27 is connected to a gate voltage input terminal of the first MOS switch 17 as In1 and a gate voltage input terminal of the second MOS switch 18 as In 2. The ground terminal of the second comparator 27 is GND. The signal output end of the first comparator 26 is connected to one end of the signal generating capacitor 27, the other end of the signal generating capacitor 27 is connected to the + terminal of the second comparator 27, one end of the first resistor 22 is connected to the V + port, the other end of the first resistor is connected in series with the third resistor 28 and then grounded, that is, connected to GND, one end of the fourth resistor 29 is connected to the signal output end of the first comparator 26, the other end of the fourth resistor is grounded, that is, GND, and the-terminal of the second comparator 27 is connected to the other end of the first resistor 22. When the maximum output voltage of the energy collector is detected, the circuit can output a control signal with adjustable duty ratio to control the on and off of the switch 4. The second comparator 27 has a supply port of V + and a ground terminal of GND.
The power supply of the switch control circuit 13 is completely provided by the energy collector 3, and only when the output voltage of the energy collector 3 reaches the maximum value, the on and off of the signal control switch 4 can be controlled, so that the signal control switch 4 works only in a short time when the output voltage of the energy collector 3 reaches the maximum value, the signal control switch does not work in other time, and the energy loss caused by the switching action is not generated, so that the power consumption of a switching device can be greatly reduced, and the energy obtaining efficiency of the energy collection management circuit is improved.
As shown in fig. 5: the pulse output circuit 14 includes a third comparator 30, a fourth comparator 31, a fifth comparator 32, a fifth resistor R7, a sixth resistor R8, a seventh resistor R9, an eighth resistor R10, a ninth resistor R11, a tenth resistor R12, and a pulse output circuit capacitor. The power supply port of the fourth comparator 31 is V +, that is, the V + port in fig. 3, the power supply port of the fourth comparator 31 is simultaneously connected to one end of the fifth resistor R7, the power supply port of the fifth comparator 32, and the power supply port of the third comparator 30, the other end of the fifth resistor R7 is connected in series with the sixth resistor R8 and then grounded, that is, GND, the signal output end of the fourth comparator 32 is the signal output end of the pulse output circuit 14, the ground end of the fourth comparator 32 is GND, the ground end of the third comparator 30 is GND, the + terminal of the third comparator 30 is connected to the other end of the fifth resistor R7, and the-terminal of the third comparator 30 is connected to REF, that is, a reset signal. The signal output end of the fourth comparator 31 is connected to one end of the seventh resistor R9 and one end of the tenth resistor R12, the other end of the seventh resistor R9 is connected to one end of the pulse output circuit capacitor, the-terminal of the fourth comparator 31 and the-terminal of the fifth comparator 32, the other end of the pulse output circuit capacitor is grounded, i.e., GND, the other end of the tenth resistor R12 is connected to one end of the eighth resistor R10 and the + terminal of the fourth comparator 31, the other end of the eighth resistor R10 is grounded, i.e., GND, one end of the ninth resistor R11 is grounded, i.e., GND, and the other end of the ninth resistor R11 is connected to the + terminal of the fourth comparator 31.
As shown in fig. 6: the flyback converter circuit 10 includes a high-Q value transformer 33 and a flyback converter circuit capacitor, one input end of the high-Q value transformer 33 is connected with one end of the energy storage capacitor 9, the other input end is connected in series with the power supply switch actuator 11 and then connected with the other end of the energy storage capacitor 9, two ends of the flyback converter circuit capacitor are respectively connected with two output ends of the high-Q value transformer 33, and two output ends of the high-Q value transformer 33 are connected with a dc load.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims (10)

1. Frequency conversion formula low frequency vibration energy gathers management system, its characterized in that: the energy collection device comprises an energy collection main circuit (1) and a control circuit (2), wherein an energy input end of the control circuit (2) is connected and conducted with an energy output end of the energy collection main circuit (1), and a signal output end of the control circuit (2) is connected with a signal input end of the energy collection main circuit (1);
the energy collection main circuit (1) comprises an energy collector (3), an isolation transformer (8), a sorting circuit (5) and an energy storage module, the energy output end of the energy collector (3) simultaneously controls the energy input end of the circuit (2) and the energy input end of the isolation transformer (8), a control switch module is arranged between the energy collector (3) and the isolation transformer (8), the energy output end of the isolation transformer (8) is connected with the energy storage module after being connected with a rectification circuit (5) in series, the energy output end of the isolation transformer (8) is also connected with a flyback conversion circuit (10) for supplying power to a direct-current load, a power supply switch module is arranged between the energy output end of the isolation transformer (8) and the energy input end of the flyback conversion circuit (10), and the signal output end of the control circuit (2) is simultaneously connected with the signal input end of the control switch module and the signal input end of the power supply switch module.
2. The variable frequency low frequency vibration energy harvesting management system of claim 1 wherein: the energy collector (3) comprises a voltage source and a collecting capacitor (6), two electrodes of the voltage source are respectively communicated with two ends of the collecting capacitor (6), and two ends of the voltage source are simultaneously connected with an energy input end of the isolation transformer (8) and an energy input end of the control circuit (2).
3. The variable frequency low frequency vibration energy harvesting management system of claim 1 wherein: the control switch module comprises a signal control switch (4), and the power supply switch module is a power supply switch.
4. The variable frequency low frequency vibration energy harvesting management system of claim 1 wherein: the control circuit (2) comprises a switch control circuit (13) and a pulse output circuit (14); the energy output end of the energy collector (3) is simultaneously connected with the energy input end of the switch control circuit (13) and the energy input end of the pulse output circuit (14), the signal output end of the pulse output circuit (14) is simultaneously connected with the signal input end of the switch control circuit (13) and the signal input end of the power supply switch module, and the signal output end of the switch control circuit (13) is connected with the signal input end of the control switch module.
5. The variable frequency low frequency vibration energy harvesting management system of claim 4 wherein: the power supply switch module comprises a power supply switch controller (16) and a power supply switch actuator (11), wherein a signal input end of the power supply switch controller (16) is connected with a signal output end of a pulse output circuit (14), a signal output end of the power supply switch controller (16) is connected with a signal input end of the power supply switch actuator (11), and the power supply switch actuator (11) is arranged between an energy output end of the rectifying circuit (5) and an energy input end of the flyback conversion circuit (10).
6. The variable frequency low frequency vibration energy harvesting management system of claim 4 wherein: the control circuit (2) further comprises a capacitance energy detection circuit (15), the detection end of the capacitance energy detection circuit (15) is connected with the energy storage module (9), and the signal output end of the capacitance energy detection circuit (15) is connected with the signal input end of the pulse output circuit (14).
7. The variable frequency low frequency vibration energy harvesting management system of claim 4 wherein: the control circuit (2) further comprises an AC-DC circuit (12), the energy input end of the AC-DC circuit (12) is connected with the energy output end of the energy collector (3), and the energy input end of the AC-DC circuit (12) is simultaneously connected with the energy input end of the switch control circuit (13) and the energy input end of the pulse output circuit (14).
8. The variable frequency low frequency vibration energy harvesting management system of claim 4 or 7 wherein: the switch control circuit (13) comprises a voltage maximum value detection circuit (20) and a control signal generation circuit (21), wherein the input end of the voltage maximum value detection circuit (20) is connected with the energy output end of the energy collector (3), the signal input end of the control signal generation circuit (21) is connected with the signal input end of the voltage maximum value detection circuit (20), and the signal output end of the control signal generation circuit (21) is connected with the signal input end of the control switch module.
9. The variable frequency low frequency vibration energy harvesting management system of claim 8 wherein: the voltage maximum value detection circuit (20) comprises a first comparator (26), a power supply port of the first comparator (26) is connected with an energy output end of the energy collector (3), a grounding end of the first comparator (26) is grounded, and an output end of the first comparator (26) is connected with a signal input end of the control signal generation circuit (21).
10. The variable frequency low frequency vibration energy harvesting management system of claim 8 wherein: the control signal generating circuit (21) comprises a second comparator (23), a power supply port of the second comparator (23) is connected with an energy output end of the energy collector (3), a grounding end of the second comparator (23) is grounded, and an output end of the second comparator (23) is connected with a signal input end of the switch control circuit (13).
CN202211094596.7A 2022-09-04 2022-09-04 Variable-frequency low-frequency vibration energy acquisition management system Pending CN115589163A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117375264A (en) * 2023-12-06 2024-01-09 清华大学深圳国际研究生院 Efficient electric energy integration device based on vibration energy taking

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117375264A (en) * 2023-12-06 2024-01-09 清华大学深圳国际研究生院 Efficient electric energy integration device based on vibration energy taking

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