CN114759825A - Piezoelectric-friction-electromagnetic suspension type composite energy acquisition and management device - Google Patents
Piezoelectric-friction-electromagnetic suspension type composite energy acquisition and management device Download PDFInfo
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- CN114759825A CN114759825A CN202210426902.6A CN202210426902A CN114759825A CN 114759825 A CN114759825 A CN 114759825A CN 202210426902 A CN202210426902 A CN 202210426902A CN 114759825 A CN114759825 A CN 114759825A
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- 239000002131 composite material Substances 0.000 title claims abstract description 19
- 239000000725 suspension Substances 0.000 title claims abstract description 15
- 238000010248 power generation Methods 0.000 claims abstract description 120
- 239000003990 capacitor Substances 0.000 claims abstract description 112
- 238000004146 energy storage Methods 0.000 claims abstract description 31
- 230000006698 induction Effects 0.000 claims description 70
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 40
- 229910052782 aluminium Inorganic materials 0.000 claims description 40
- -1 polytetrafluoroethylene Polymers 0.000 claims description 34
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 34
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 34
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 28
- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 claims description 28
- 239000000919 ceramic Substances 0.000 claims description 26
- 238000003306 harvesting Methods 0.000 claims description 2
- 238000005339 levitation Methods 0.000 claims 3
- 230000002459 sustained effect Effects 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 241001124569 Lycaenidae Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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Abstract
The invention discloses a piezoelectric-friction-electromagnetic suspension type composite energy acquisition and management device, which belongs to the technical field of energy acquisition device design and comprises a device shell, a piezoelectric-friction-electromagnetic suspension type composite energy acquisition and management device and a piezoelectric-friction-electromagnetic suspension type composite energy management device, wherein the device shell is used for protecting a piezoelectric-friction-electromagnetic power generation module; the piezoelectric-friction-electromagnetic power generation module is used for generating piezoelectric power generation current, friction power generation current and electromagnetic power generation current respectively through piezoelectric power generation, friction power generation and electromagnetic power generation; the energy management module is used for rectifying the piezoelectric generating current, the friction generating current and the electromagnetic generating current into direct current by utilizing a rectifier bridge, then connecting the direct current in parallel, prestoring electric energy into a capacitor, and outputting the electric energy to an energy storage capacitor to supply power to the electronic device when the voltage at two ends of the capacitor reaches a preset voltage; the present invention solves the problem of collecting and converting vibrational energy in an environment into sustained electrical energy.
Description
Technical Field
The invention belongs to the technical field of energy acquisition device design, and particularly relates to a piezoelectric-friction-electromagnetic suspension type composite energy acquisition and management device.
Background
In recent years, wearable electronic devices have attracted much attention due to their potential applications in robots, human-computer interfaces, and human motion detection. Portable, long lasting energy demands are increasing.
Harvesting vibrational energy from the environment and converting it into electrical energy is one possible method. Although energy harvesters based on the friction, electromagnetic and piezoelectric effects have been proposed, they each have significant advantages and disadvantages. For example, the friction generator has large voltage and small current, the electromagnetic generator has small voltage and large current, and the piezoelectric generator has weak response to low-frequency vibration, so that a composite energy collecting device integrating the advantages and the disadvantages of the three generators is needed.
In addition, the electric energy generated by the power generation unit is in an alternating current form, is intermittent and cannot be directly utilized, and the collected energy needs to be managed, so that the utilization of the electric energy is maximized, and the electric energy is adapted to rear-end electronic devices.
Disclosure of Invention
In order to overcome the defects in the prior art, the piezoelectric-friction-electromagnetic suspension type composite energy collecting and managing device provided by the invention collects the vibration energy in the environment, and solves the problem of collecting the vibration energy in the environment and converting the vibration energy into the continuous electric energy.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
the invention provides a piezoelectric-friction-electromagnetic suspension type composite energy acquisition and management device, which comprises:
the device shell is used for protecting the piezoelectric-friction-electromagnetic power generation module;
the piezoelectric-friction-electromagnetic power generation module is used for respectively generating piezoelectric power generation current, friction power generation current and electromagnetic power generation current through piezoelectric power generation, friction power generation and electromagnetic power generation;
and the energy management module is used for rectifying the piezoelectric generating current, the friction generating current and the electromagnetic generating current into direct current respectively by utilizing the rectifier bridge, then connecting the direct current in parallel, prestoring electric energy into the capacitor, and outputting the electric energy to the energy storage capacitor to supply power to the electronic device when the voltage at two ends of the capacitor reaches a preset voltage.
The beneficial effects of the invention are as follows: the invention provides a piezoelectric-friction-electromagnetic suspension type composite energy collecting and managing device, which is characterized in that a piezoelectric-friction-electromagnetic power generation module and an energy management module are protected by a device shell, the device is anti-falling and shockproof, alternating current is obtained by piezoelectric power generation, friction power generation and electromagnetic power generation through the piezoelectric-friction-electromagnetic power generation module respectively, and direct current after the alternating current is rectified through the energy management module is subjected to methods such as cold start, voltage boosting and reducing management, under-voltage protection, maximum power point tracking and the like, so that electric energy is effectively stored in a capacitor, the electric energy is output to a rear-end energy storage capacitor after a certain voltage is reached, the electric energy in the energy storage capacitor can be continuously used, and the purpose of collecting vibration energy in an environment and converting the vibration energy into continuous electric energy is realized.
Further, the piezoelectric-friction-electromagnetic power generation module includes:
the piezoelectric power generation submodule is used for generating piezoelectric power generation current through piezoelectric power generation;
the friction power generation submodule is used for generating friction power generation current through friction power generation;
and the electromagnetic power generation submodule is used for generating electromagnetic power generation current through electromagnetic power generation.
The beneficial effect of adopting the further scheme is as follows: the piezoelectric-friction-electromagnetic power generation module obtains piezoelectric power generation current, friction power generation current and electromagnetic power generation current through a piezoelectric power generation submodule, a friction power generation submodule and an electromagnetic power generation submodule respectively.
Furthermore, the piezoelectric-friction-electromagnetic power generation module is composed of a first magnet, a second magnet, a beryllium copper alloy plate, a first piezoelectric ceramic plate, a second piezoelectric ceramic plate, a first electrode, a second electrode, a first fixing plate, a second fixing plate, a first aluminum plate, a first magnetic induction coil, a second magnetic induction coil, a third magnetic induction coil, a first polytetrafluoroethylene layer, a third magnet, a second polytetrafluoroethylene layer, a second aluminum plate, a third fixing plate and a fourth magnet;
the first magnet and the second magnet are oppositely arranged on the upper side and the lower side of one end of the beryllium copper alloy plate; one side of the first piezoelectric ceramic piece is connected with the middle part of the upper side of the beryllium copper alloy plate; the other side of the first piezoelectric ceramic piece is connected with a first electrode; one side of the second piezoelectric ceramic plate is connected with the middle part of the lower side of the beryllium copper alloy plate; the other side of the second piezoelectric ceramic piece is connected with a second electrode; the first electrode, the second electrode and the beryllium copper alloy plate are all connected with the energy management module; the first fixing plate and the second fixing plate are oppositely arranged on the upper side and the lower side of the other end of the beryllium copper alloy plate; the first aluminum plate is arranged below the second fixing plate; the first magnetic induction coil, the second magnetic induction coil and the third magnetic induction coil are arranged below the first aluminum plate from top to bottom; the first magnetic induction coil, the second magnetic induction coil and the third magnetic induction coil are all connected with the energy management module; the first polytetrafluoroethylene layer, the third magnet and the second polytetrafluoroethylene layer are arranged inside the first magnetic induction coil, the second magnetic induction coil and the third magnetic induction coil from top to bottom; the second aluminum plate is arranged below the third magnetic induction coil; the third fixing plate is arranged below the second aluminum plate; the first aluminum plate, the second aluminum plate, the first polytetrafluoroethylene layer and the second polytetrafluoroethylene layer are all connected with the energy management module; the fourth magnet is arranged below the third fixing plate.
The beneficial effect of adopting the above further scheme is that: the piezoelectric-friction-electromagnetic power generation module achieves the purpose of obtaining transient electric energy in the environment through the structure.
Furthermore, the piezoelectric power generation submodule is composed of a first magnet, a second magnet, a beryllium copper alloy plate, a first piezoelectric ceramic piece, a second piezoelectric ceramic piece, a first electrode, a second electrode, a first fixing plate and a second fixing plate;
the friction power generation submodule consists of a first aluminum plate, a first polytetrafluoroethylene layer, a second polytetrafluoroethylene layer and a second aluminum plate;
the electromagnetic power generation submodule is composed of a first magnetic induction coil, a second magnetic induction coil, a third magnet, a third fixing plate and a fourth magnet.
The beneficial effect of adopting the further scheme is as follows: the piezoelectric power generation submodule is an energy collector of a typical cantilever beam-mass block structure, when a piezoelectric ceramic material is subjected to external force to generate mechanical strain, the center of charges in the material shifts, so that different charges are accumulated on the upper surface and the lower surface to form a potential difference, and power generation is realized; the friction power generation sub-module consists of polytetrafluoroethylene and aluminum, and charge transfer is formed in the contact friction process by utilizing the difference of electron gaining and losing capacities of two different materials to generate potential difference; the electromagnetic power generation submodule utilizes the characteristic that the third magnet and the fourth magnet have repulsive force between magnets with the same polarity, and generates induced current by the fact that the third magnet continuously cuts the magnetic induction lines of the first magnetic induction coil, the second magnetic induction coil and the third magnetic induction coil.
Further, the energy management module includes:
the piezoelectric rectifier module is used for rectifying piezoelectric power generation current to obtain piezoelectric direct current;
the friction rectifier module is used for rectifying friction power generation current to obtain friction direct current;
the electromagnetic rectifier sub-module is used for rectifying the electromagnetic generating current to obtain electromagnetic direct current;
and the electric energy management submodule is used for receiving the direct current obtained by connecting the piezoelectric direct current, the friction direct current and the electromagnetic direct current in parallel, prestoring electric energy into the capacitor, and outputting the electric energy to the energy storage capacitor to supply power to the electronic device when the voltage at two ends of the capacitor reaches a preset voltage.
The beneficial effect of adopting the above further scheme is that: the energy management module rectifies the obtained alternating current into direct current, effectively stores electric energy into the capacitor, and outputs the electric energy to the energy storage capacitor to supply power for the rear-end electronic device after the preset voltage is reached.
Further, the piezoelectric rectifier module is composed of a first rectifier and a second rectifier; the friction rectifier module consists of a third rectifier and a fourth rectifier; the electromagnetic current rectifier sub-module consists of a fifth rectifier, a sixth rectifier and a seventh rectifier;
The input end of the first rectifier is respectively connected with the first electrode and the beryllium copper alloy plate; the input end of the second rectifier is respectively connected with the second electrode and the beryllium copper alloy plate; the input end of the third rectifier is connected with the first aluminum plate and the first polytetrafluoroethylene layer respectively; the input end of the fourth rectifier is connected with the second aluminum plate and the second polytetrafluoroethylene layer respectively; the input end of the fifth rectifier is respectively connected with two ends of the first magnetic induction coil; the input end of the sixth rectifier is respectively connected with two ends of the second magnetic induction coil; the input end of the seventh rectifier is respectively connected with two ends of the third magnetic induction coil;
and the first rectifier output end, the second rectifier output end, the third rectifier output end, the fourth rectifier output end, the fifth rectifier output end, the sixth rectifier output end and the seventh rectifier output end are connected in parallel and then connected with the electric energy management submodule.
The beneficial effect of adopting the further scheme is as follows: alternating currents obtained by the piezoelectric power generation submodule, the friction power generation submodule and the electromagnetic power generation submodule are converted into direct currents through the rectifiers respectively, and the direct currents are connected in parallel and then input into the electric energy management submodule to be stored.
Further, the electric energy management submodule comprises an energy management chip U1 with a model number of BQ25570, an input extension socket P1, an output extension socket P2, a module adjusting extension socket P3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, an inductor L1, an inductor L2, an energy storage capacitor CT1, an energy storage capacitor CT2 and a diode D1;
the 1 st pin and the 2 nd pin of the input extension socket P1 are both grounded; the 2 nd pin of the input extension socket P1 is connected with the 5 th pin of an energy management chip U1; a 3 rd pin of the input extension socket P1 is respectively connected with one end of a resistor R1, one end of a capacitor C1, a 2 nd pin of an energy management chip U1 and one end of an inductor L1; the other end of the capacitor C1 is grounded; the other end of the inductor L1 is connected with the 20 th pin of the energy management chip U1; the other end of the resistor R1 is connected with one end of a resistor R2; the other end of the resistor R2 is connected with the 1 st pin of the module adjusting socket P3 and is grounded; the 2 nd pin of the module adjusting socket P3 is connected with the 13 th pin of the energy management chip U1; the 3 rd pin of the module adjusting extension socket P3 is respectively connected with one end of a resistor R3 and the 3 rd pin of the energy management chip U1; the other end of the resistor R3 is grounded; the 4 th pin of the module adjusting extension socket P3 is connected with the 6 th pin of the energy management chip U1; the 5 th pin of the module adjusting extension socket P3 is respectively connected with the 6 th pin, one end of a capacitor C2, one end of a capacitor C3 and the 19 th pin of the energy management chip U1; the other end of the capacitor C2 and the other end of the capacitor C3 are both grounded; the 0 th pin of the energy management chip U1 is grounded; the 7 th pin of the energy management chip U1 is respectively connected with one end of a resistor R4 and one end of a resistor R5; the other end of the resistor R5 is grounded; the other end of the resistor R4 is respectively connected with the 8 th pin of the energy management chip U1, one end of the resistor R6 and one end of the resistor R9; the other end of the resistor R6 is respectively connected with the 10 th pin of the energy management chip U1 and one end of the resistor R6; the other end of the resistor R7 is respectively connected with one end of a resistor R8 and the 11 th pin of the energy management chip U1; the other end of the resistor R9 is respectively connected with one end of a resistor R10 and the 12 th pin of the energy management chip U1; the other end of the resistor R8, the other end of the resistor R10 and the 9 th pin of the energy management chip U1 are grounded; a 14 th pin of the energy management chip U1 is connected with one end of an inductor L2, one end of a capacitor C5, one end of a capacitor C6 and a 3 rd pin of an output extension socket P2 respectively; the other end of the inductor L2 is connected with a 16 th pin of an energy management chip U1; the other end of the capacitor C5 and the other end of the capacitor C6 are both grounded; the 4 th pin of the output socket P2 is grounded; the 15 th pin of the energy management chip U1 is grounded; the 2 nd pin of the output extension socket P2 is respectively connected with one end of a resistor R11, one end of an energy storage capacitor CT2, one end of a capacitor C7, one end of an energy storage capacitor CT1 and the 18 th pin of an energy management chip U1; the other end of the energy storage capacitor CT1, the other end of the capacitor C7, the other end of the energy storage capacitor CT2 and the 1 st pin of the output socket P2 are all grounded; the other end of the resistor R11 is connected with the anode of a diode D1; the cathode of the diode D1 is grounded; the 17 th pin of the energy management chip U1 is grounded.
The beneficial effect of adopting the above further scheme is that: the electric energy management submodule is used for effectively pre-storing the electric energy into the capacitor through methods of cold starting, voltage boosting and reducing management, under-voltage protection, maximum power point tracking and the like on the direct current obtained by rectification, and the electric energy is output into the rear-end energy storage capacitor after reaching the preset voltage.
Drawings
Fig. 1 is a schematic structural diagram of a piezoelectric-friction-electromagnetic suspension type composite energy collecting and managing device in an embodiment of the invention.
Fig. 2 is a front view of a piezoelectric-friction-electromagnetic power generation module in an embodiment of the present invention.
Fig. 3 is a top view of a piezo-friction-electromagnetic power generation module in an embodiment of the present invention.
FIG. 4 is a graph showing the results of voltage and current generated by the electromagnetic power generation test in the embodiment of the present invention.
FIG. 5 is a schematic circuit diagram of a power management submodule in an embodiment of the invention.
Fig. 6 is a diagram illustrating a test result of the power management sub-module according to the embodiment of the present invention.
Wherein: 1. a first magnet; 2. a second magnet; 3. beryllium-copper alloy plates; 4. a first piezoelectric ceramic sheet; 5. a second piezoelectric ceramic sheet; 6. a first electrode; 7. a second electrode; 8. a first fixing plate; 9. a second fixing plate; 10. a first aluminum plate; 11. a first magnetic induction coil; 12. a second magnetic induction coil; 13. a third magnetic induction coil; 14. a first polytetrafluoroethylene layer; 15. a third magnet; 16. a second polytetrafluoroethylene layer; 17. a second aluminum plate; 18. a third fixing plate; 19. and a fourth magnet.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
In one embodiment of the present invention, as shown in fig. 1, the present invention provides a piezoelectric-friction-electromagnetic suspension type composite energy collecting and managing device, comprising:
the device shell is used for protecting the piezoelectric-friction-electromagnetic power generation module;
the piezoelectric-friction-electromagnetic power generation module is used for generating piezoelectric power generation current, friction power generation current and electromagnetic power generation current respectively through piezoelectric power generation, friction power generation and electromagnetic power generation;
as shown in fig. 2 and 3, the piezo-friction-electromagnetic generating module includes:
the piezoelectric power generation submodule is used for generating piezoelectric power generation current through piezoelectric power generation;
the friction power generation submodule is used for generating friction power generation current through friction power generation;
The electromagnetic power generation submodule is used for generating electromagnetic power generation current through electromagnetic power generation;
the piezoelectric-friction-electromagnetic power generation module respectively obtains piezoelectric power generation current, friction power generation current and electromagnetic power generation current through a piezoelectric power generation submodule, a friction power generation submodule and an electromagnetic power generation submodule;
the piezoelectric-friction-electromagnetic power generation module is composed of a first magnet 1, a second magnet 2, a beryllium copper alloy plate 3, a first piezoelectric ceramic plate 4, a second piezoelectric ceramic plate 5, a first electrode 6, a second electrode 7, a first fixing plate 8, a second fixing plate 9, a first aluminum plate 10, a first magnetic induction coil 11, a second magnetic induction coil 12, a third magnetic induction coil 13, a first polytetrafluoroethylene layer 14, a third magnet 15, a second polytetrafluoroethylene layer 16, a second aluminum plate 17, a third fixing plate 18 and a fourth magnet 19;
the first magnet 1 and the second magnet 2 are oppositely arranged on the upper side and the lower side of one end of the beryllium copper alloy plate 3; one side of the first piezoelectric ceramic plate 4 is connected with the middle part of the upper side of the beryllium-copper alloy plate 3; the other side of the first piezoelectric ceramic piece 4 is connected with a first electrode 6; one side of the second piezoelectric ceramic plate 5 is connected with the middle part of the lower side of the beryllium copper alloy plate 3; the other side of the second piezoelectric ceramic piece 5 is connected with a second electrode 7; the first electrode 6, the second electrode 7 and the beryllium copper alloy plate 3 are all connected with an energy management module; the first fixing plate 8 and the second fixing plate 9 are oppositely arranged on the upper side and the lower side of the other end of the beryllium copper alloy plate 3; the first aluminum plate 10 is arranged below the second fixing plate 9; the first magnetic induction coil 11, the second magnetic induction coil 12 and the third magnetic induction coil 13 are arranged below the first aluminum plate 10 from top to bottom; the first magnetic induction coil 11, the second magnetic induction coil 12 and the third magnetic induction coil 13 are all connected with an energy management module; the first polytetrafluoroethylene layer 14, the third magnet 15 and the second polytetrafluoroethylene layer 16 are arranged inside the first magnetic induction coil 11, the second magnetic induction coil 12 and the third magnetic induction coil 13 from top to bottom; the second aluminum plate 17 is arranged below the third magnetic induction coil 13; the third fixing plate 18 is arranged below the second aluminum plate 17; the first aluminum plate 10, the second aluminum plate 17, the first polytetrafluoroethylene layer 14 and the second polytetrafluoroethylene layer 16 are all connected with the energy management module; the fourth magnet 19 is arranged below the third fixing plate 18;
The piezoelectric power generation submodule consists of a first magnet 1, a second magnet 2, a beryllium copper alloy plate 3, a first piezoelectric ceramic piece 4, a second piezoelectric ceramic piece 5, a first electrode 6, a second electrode 7, a first fixing plate 8 and a second fixing plate 9;
the piezoelectric power generation submodule is a typical energy collector with a cantilever beam-mass block structure, when a piezoelectric ceramic material is subjected to external force to generate mechanical strain, the center of charges in the material is shifted, so that different charges are accumulated on the upper surface and the lower surface to form potential difference, power generation is realized, and the piezoelectric power generation submodule can respectively reach 3.7V and 10 muA at 2Hz and can reach 36V and 0.3mA at 7 Hz;
the friction power generation sub-module is composed of a first aluminum plate 10, a first polytetrafluoroethylene layer 14, a second polytetrafluoroethylene layer 16 and a second aluminum plate 17;
the friction power generation sub-module is composed of polytetrafluoroethylene and the like and aluminum, and charge transfer is formed in the contact friction process by utilizing the difference of electron gaining and losing capacities of two different materials to generate potential difference;
the electromagnetic power generation sub-module consists of a first magnetic induction coil 11, a second magnetic induction coil 12, a third magnetic induction coil 13, a third magnet 15, a third fixing plate 18 and a fourth magnet 19;
The first magnetic induction coil 11, the second magnetic induction coil 12 and the third magnetic induction coil 13 are separately tested, as shown in fig. 4, the voltage generated by the three coils reaches 2.2V after being superimposed at 2Hz vibration frequency, and the current generated reaches 2.21mA after being superimposed; the voltage generated by the three coils reaches 23.2V after being superposed at the vibration frequency of 7Hz, and the generated current reaches 53mA after being superposed;
the electromagnetic power generation submodule utilizes the characteristic that a third magnet and a fourth magnet have repulsive force between magnets with the same polarity, and the third magnet continuously performs motion of cutting magnetic induction lines on the first magnetic induction coil 11, the second magnetic induction coil 12 and the third magnetic induction coil 13 to generate induced current;
the energy management module is used for rectifying the piezoelectric generating current, the friction generating current and the electromagnetic generating current into direct current respectively by utilizing the rectifier bridge, then connecting the direct current in parallel, prestoring electric energy into a capacitor, and outputting the electric energy to the energy storage capacitor to supply power to the electronic device when the voltage at two ends of the capacitor reaches a preset voltage;
the energy management module includes:
the piezoelectric rectifier module is used for rectifying piezoelectric power generation current to obtain piezoelectric direct current;
The friction rectifier module is used for rectifying friction power generation current to obtain friction direct current;
the electromagnetic rectifier sub-module is used for rectifying the electromagnetic generating current to obtain electromagnetic direct current;
the piezoelectric rectifier module consists of a first rectifier and a second rectifier; the friction rectifier module consists of a third rectifier and a fourth rectifier; the electromagnetic current rectifier sub-module consists of a fifth rectifier, a sixth rectifier and a seventh rectifier; rectifying the obtained alternating-current electric energy into direct current and storing the direct current, and reducing electric energy loss to the maximum extent through full-wave rectification;
IN the scheme, an IN5817 type diode is selected to build a rectifier bridge by self, so that the electric energy loss is avoided, and the rectification efficiency is as high as 97.9%;
the input end of the first rectifier is respectively connected with the first electrode 6 and the beryllium copper alloy plate 3; the input end of the second rectifier is respectively connected with the second electrode 7 and the beryllium copper alloy plate 3; the input end of the third rectifier is respectively connected with the first aluminum plate 10 and the first polytetrafluoroethylene layer 14; the input end of the fourth rectifier is respectively connected with a second aluminum plate 17 and a second polytetrafluoroethylene layer 16; the input end of the fifth rectifier is respectively connected with two ends of the first magnetic induction coil 11; the input end of the sixth rectifier is respectively connected with two ends of the second magnetic induction coil 12; the input end of the seventh rectifier is respectively connected with two ends of the third magnetic induction coil 13;
The first rectifier output end, the second rectifier output end, the third rectifier output end, the fourth rectifier output end, the fifth rectifier output end, the sixth rectifier output end and the seventh rectifier output end are connected in parallel and then connected with the electric energy management submodule; respectively converting alternating currents obtained by the friction power generation submodule, the electromagnetic power generation submodule and the piezoelectric power generation submodule into direct currents through the rectifiers, and inputting the direct currents into the electric energy management submodule for storage after the direct currents are connected in parallel;
the electric energy management submodule is used for receiving direct current obtained by connecting piezoelectric direct current, friction direct current and electromagnetic direct current in parallel, prestoring electric energy into a capacitor, and outputting the electric energy to an energy storage capacitor to supply power to an electronic device when the voltage at two ends of the capacitor reaches a preset voltage;
although the rectified electric energy is converted into direct current, the electric energy is still in a pulse form and cannot directly supply power to an electronic device, so that a simple capacitor is selected for charging, a circuit is built for testing, about 400 commercial LED lamps can be easily lightened by lightly shaking the electric energy by hands, and meanwhile, the watch is used as the electronic device, and the electric energy generated by shaking can also supply power to the watch;
Although the rectifying and storing mode has certain effect, the electric energy waste is high, the output voltage cannot be controlled, and the rear-end electronic device is easily damaged; therefore, the electric energy management submodule is used for effectively pre-storing the electric energy to the energy storage capacitor by the methods of cold starting, voltage boosting and reducing management, under-voltage protection, maximum power point tracking and the like for the direct current after the front end is rectified;
as shown in fig. 5, the electric energy management submodule includes an energy management chip U1 with a model number of BQ25570, an input extension P1, an output extension P2, a module adjustment extension P3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, an inductor L1, an inductor L2, an energy storage capacitor CT1, an energy storage capacitor CT2, and a diode D1;
the 1 st pin and the 2 nd pin of the input extension socket P1 are both grounded; the 2 nd pin of the input extension socket P1 is connected with the 5 th pin of an energy management chip U1; a 3 rd pin of the input extension socket P1 is respectively connected with one end of a resistor R1, one end of a capacitor C1, a 2 nd pin of an energy management chip U1 and one end of an inductor L1; the other end of the capacitor C1 is grounded; the other end of the inductor L1 is connected with the 20 th pin of the energy management chip U1; the other end of the resistor R1 is connected with one end of a resistor R2; the other end of the resistor R2 is connected with the 1 st pin of the module adjusting extension socket P3 and is grounded; the 2 nd pin of the module adjusting socket P3 is connected with the 13 th pin of the energy management chip U1; the 3 rd pin of the module adjusting extension socket P3 is respectively connected with one end of a resistor R3 and the 3 rd pin of the energy management chip U1; the other end of the resistor R3 is grounded; the 4 th pin of the module adjusting extension socket P3 is connected with the 6 th pin of the energy management chip U1; the 5 th pin of the module adjusting extension socket P3 is respectively connected with the 6 th pin, one end of a capacitor C2, one end of a capacitor C3 and the 19 th pin of the energy management chip U1; the other end of the capacitor C2 and the other end of the capacitor C3 are both grounded; the 0 th pin of the energy management chip U1 is grounded; the 7 th pin of the energy management chip U1 is respectively connected with one end of a resistor R4 and one end of a resistor R5; the other end of the resistor R5 is grounded; the other end of the resistor R4 is respectively connected with the 8 th pin of the energy management chip U1, one end of the resistor R6 and one end of the resistor R9; the other end of the resistor R6 is respectively connected with the 10 th pin of the energy management chip U1 and one end of the resistor R6; the other end of the resistor R7 is respectively connected with one end of a resistor R8 and the 11 th pin of the energy management chip U1; the other end of the resistor R9 is respectively connected with one end of a resistor R10 and the 12 th pin of the energy management chip U1; the other end of the resistor R8, the other end of the resistor R10 and the 9 th pin of the energy management chip U1 are grounded; the 14 th pin of the energy management chip U1 is respectively connected with one end of an inductor L2, one end of a capacitor C5, one end of a capacitor C6 and the 3 rd pin of an output extension socket P2; the other end of the inductor L2 is connected with a 16 th pin of an energy management chip U1; the other end of the capacitor C5 and the other end of the capacitor C6 are both grounded; the 4 th pin of the output socket P2 is grounded; the 15 th pin of the energy management chip U1 is grounded; the 2 nd pin of the output extension socket P2 is respectively connected with one end of a resistor R11, one end of an energy storage capacitor CT2, one end of a capacitor C7, one end of an energy storage capacitor CT1 and the 18 th pin of an energy management chip U1; the other end of the energy storage capacitor CT1, the other end of the capacitor C7, the other end of the energy storage capacitor CT2 and the 1 st pin of the output socket P2 are all grounded; the other end of the resistor R11 is connected with the anode of a diode D1; the cathode of the diode D1 is grounded; the 17 th pin of the energy management chip U1 is grounded.
The electric energy management submodule is used for effectively pre-storing the electric energy into the capacitor through methods such as cold start, voltage boosting and reducing management, under-voltage protection, maximum power point tracking and the like on the direct current obtained by rectification, and the electric energy is output into the rear-end energy storage capacitor after reaching a certain voltage; as shown in fig. 6, the built power management circuit is tested, and capacitors with different capacities are charged under the condition of 7 Hz; the vibration is started at 0s, the power generation unit is used for charging the capacitor, the vibration is stopped after 5s, at the moment, the power generation unit does not work any more, but the capacitor still keeps a continuously charged state, the reason is that the power management circuit is provided with the energy pre-storage capacitor, the capacitor can still be charged with a hysteresis function after the power supply end stops supplying power, and the rectification efficiency reaches 74.6%.
Claims (7)
1. A piezoelectric-friction-electromagnetic suspension type composite energy collection and management device, comprising:
the device shell is used for protecting the piezoelectric-friction-electromagnetic power generation module;
the piezoelectric-friction-electromagnetic power generation module is used for generating piezoelectric power generation current, friction power generation current and electromagnetic power generation current respectively through piezoelectric power generation, friction power generation and electromagnetic power generation;
the energy management module is used for rectifying the piezoelectric generating current, the friction generating current and the electromagnetic generating current into direct current respectively by utilizing the rectifier bridge, then connecting the direct current in parallel, prestoring electric energy into the capacitor, and outputting the electric energy to the energy storage capacitor to supply power for the electronic device when the voltage at two ends of the capacitor reaches a preset voltage.
2. The piezo-friction-electromagnetic levitation type composite energy collection and management device according to claim 1, wherein the piezo-friction-electromagnetic power generation module comprises:
the piezoelectric power generation submodule is used for generating piezoelectric power generation current through piezoelectric power generation;
the friction power generation submodule is used for generating friction power generation current through friction power generation;
and the electromagnetic power generation submodule is used for generating electromagnetic power generation current through electromagnetic power generation.
3. The piezoelectric-friction-electromagnetic suspension type composite energy collection and management device according to claim 2, wherein the piezoelectric-friction-electromagnetic power generation module is composed of a first magnet (1), a second magnet (2), a beryllium copper alloy plate (3), a first piezoelectric ceramic plate (4), a second piezoelectric ceramic plate (5), a first electrode (6), a second electrode (7), a first fixing plate (8), a second fixing plate (9), a first aluminum plate (10), a first magnetic induction coil (11), a second magnetic induction coil (12), a third magnetic induction coil (13), a first polytetrafluoroethylene layer (14), a third magnet (15), a second polytetrafluoroethylene layer (16), a second aluminum plate (17), a third fixing plate (18) and a fourth magnet (19);
the first magnet (1) and the second magnet (2) are oppositely arranged on the upper side and the lower side of one end of the beryllium copper alloy plate (3); one side of the first piezoelectric ceramic plate (4) is connected with the middle part of the upper side of the beryllium copper alloy plate (3); the other side of the first piezoelectric ceramic piece (4) is connected with a first electrode (6); one side of the second piezoelectric ceramic plate (5) is connected with the middle part of the lower side of the beryllium copper alloy plate (3); the other side of the second piezoelectric ceramic piece (5) is connected with a second electrode (7); the first electrode (6), the second electrode (7) and the beryllium copper alloy plate (3) are all connected with the energy management module; the first fixing plate (8) and the second fixing plate (9) are arranged on the upper side and the lower side of the other end of the beryllium copper alloy plate (3) in a relative mode; the first aluminum plate (10) is arranged below the second fixing plate (9); the first magnetic induction coil (11), the second magnetic induction coil (12) and the third magnetic induction coil (13) are arranged below the first aluminum plate (10) from top to bottom; the first magnetic induction coil (11), the second magnetic induction coil (12) and the third magnetic induction coil (13) are all connected with the energy management module; the first polytetrafluoroethylene layer (14), the third magnet (15) and the second polytetrafluoroethylene layer (16) are arranged inside the first magnetic induction coil (11), the second magnetic induction coil (12) and the third magnetic induction coil (13) from top to bottom; the second aluminum plate (17) is arranged below the third magnetic induction coil (13); the third fixing plate (18) is arranged below the second aluminum plate (17); the first aluminum plate (10), the second aluminum plate (17), the first polytetrafluoroethylene layer (14) and the second polytetrafluoroethylene layer (16) are all connected with the energy management module; the fourth magnet (19) is arranged below the third fixing plate (18).
4. The piezoelectric-friction-electromagnetic suspension type composite energy collecting and managing device according to claim 3, wherein the piezoelectric power generation sub-module is composed of a first magnet (1), a second magnet (2), a beryllium copper alloy plate (3), a first piezoelectric ceramic plate (4), a second piezoelectric ceramic plate (5), a first electrode (6), a second electrode (7), a first fixing plate (8) and a second fixing plate (9);
the friction power generation sub-module is composed of a first aluminum plate (10), a first polytetrafluoroethylene layer (14), a second polytetrafluoroethylene layer (16) and a second aluminum plate (17);
the electromagnetic power generation submodule is composed of a first magnetic induction coil (11), a second magnetic induction coil (12), a third magnetic induction coil (13), a third magnet (15), a third fixing plate (18) and a fourth magnet (19).
5. The piezo-friction-electromagnetic levitation type composite energy harvesting and management device according to claim 4, wherein the energy management module comprises:
the piezoelectric rectifier module is used for rectifying piezoelectric power generation current to obtain piezoelectric direct current;
the friction rectifier module is used for rectifying the friction power generation current to obtain friction direct current;
the electromagnetic rectifier sub-module is used for rectifying the electromagnetic generating current to obtain electromagnetic direct current;
And the electric energy management submodule is used for receiving the direct current obtained by connecting the piezoelectric direct current, the friction direct current and the electromagnetic direct current in parallel, prestoring electric energy into the capacitor, and outputting the electric energy to the energy storage capacitor to supply power to the electronic device when the voltage at two ends of the capacitor reaches a preset voltage.
6. The piezoelectric-friction-electromagnetic levitation type composite energy collection and management device according to claim 5, wherein the piezoelectric rectifier module is composed of a first rectifier and a second rectifier; the friction rectifier module consists of a third rectifier and a fourth rectifier; the electromagnetic current rectifier sub-module consists of a fifth rectifier, a sixth rectifier and a seventh rectifier;
the input end of the first rectifier is respectively connected with the first electrode (6) and the beryllium copper alloy plate (3); the input end of the second rectifier is respectively connected with a second electrode (7) and the beryllium copper alloy plate (3); the input end of the third rectifier is respectively connected with the first aluminum plate (10) and the first polytetrafluoroethylene layer (14); the input end of the fourth rectifier is respectively connected with a second aluminum plate (17) and a second polytetrafluoroethylene layer (16); the input end of the fifth rectifier is respectively connected with two ends of the first magnetic induction coil (11); the input end of the sixth rectifier is respectively connected with two ends of the second magnetic induction coil (12); the input end of the seventh rectifier is respectively connected with two ends of a third magnetic induction coil (13);
And the output ends of the first rectifier, the second rectifier, the third rectifier, the fourth rectifier, the fifth rectifier, the sixth rectifier and the seventh rectifier are connected in parallel and then connected with the electric energy management submodule.
7. The piezoelectric-friction-electromagnetic suspension type composite energy collection and management device as claimed in claim 6, wherein the electric energy management submodule comprises an energy management chip U1 with model number BQ25570, an input extension socket P1, an output extension socket P2, a module adjustment extension socket P3, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, an inductor L1, an inductor L2, an energy storage capacitor CT1, an energy storage capacitor CT2 and a diode D1;
the 1 st pin and the 2 nd pin of the input extension socket P1 are both grounded; the 2 nd pin of the input extension socket P1 is connected with the 5 th pin of an energy management chip U1; the 3 rd pin of the input extension socket P1 is respectively connected with one end of a resistor R1, one end of a capacitor C1, the 2 nd pin of an energy management chip U1 and one end of an inductor L1; the other end of the capacitor C1 is grounded; the other end of the inductor L1 is connected with the 20 th pin of the energy management chip U1; the other end of the resistor R1 is connected with one end of a resistor R2; the other end of the resistor R2 is connected with the 1 st pin of the module adjusting socket P3 and is grounded; the 2 nd pin of the module adjusting socket P3 is connected with the 13 th pin of the energy management chip U1; the 3 rd pin of the module adjusting extension socket P3 is respectively connected with one end of a resistor R3 and the 3 rd pin of the energy management chip U1; the other end of the resistor R3 is grounded; the 4 th pin of the module adjusting extension socket P3 is connected with the 6 th pin of the energy management chip U1; the 5 th pin of the module adjusting extension socket P3 is respectively connected with the 6 th pin, one end of a capacitor C2, one end of a capacitor C3 and the 19 th pin of the energy management chip U1; the other end of the capacitor C2 and the other end of the capacitor C3 are both grounded; the 0 th pin of the energy management chip U1 is grounded; the 7 th pin of the energy management chip U1 is respectively connected with one end of a resistor R4 and one end of a resistor R5; the other end of the resistor R5 is grounded; the other end of the resistor R4 is respectively connected with the 8 th pin of the energy management chip U1, one end of the resistor R6 and one end of the resistor R9; the other end of the resistor R6 is respectively connected with the 10 th pin of the energy management chip U1 and one end of the resistor R6; the other end of the resistor R7 is respectively connected with one end of a resistor R8 and the 11 th pin of the energy management chip U1; the other end of the resistor R9 is respectively connected with one end of a resistor R10 and the 12 th pin of the energy management chip U1; the other end of the resistor R8, the other end of the resistor R10 and the 9 th pin of the energy management chip U1 are grounded; the 14 th pin of the energy management chip U1 is respectively connected with one end of an inductor L2, one end of a capacitor C5, one end of a capacitor C6 and the 3 rd pin of an output extension socket P2; the other end of the inductor L2 is connected with a 16 th pin of an energy management chip U1; the other end of the capacitor C5 and the other end of the capacitor C6 are both grounded; the 4 th pin of the output socket P2 is grounded; the 15 th pin of the energy management chip U1 is grounded; the 2 nd pin of the output extension socket P2 is respectively connected with one end of a resistor R11, one end of an energy storage capacitor CT2, one end of a capacitor C7, one end of an energy storage capacitor CT1 and the 18 th pin of an energy management chip U1; the other end of the energy storage capacitor CT1, the other end of the capacitor C7, the other end of the energy storage capacitor CT2 and the 1 st pin of the output socket P2 are all grounded; the other end of the resistor R11 is connected with the anode of a diode D1; the cathode of the diode D1 is grounded; the 17 th pin of the energy management chip U1 is grounded.
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