Self-driven power generation element and micro-generator

Abstract

The utility model discloses a self-driven power generation element and a micro generator, and the self-driven power generation element comprises an induction power generation assembly which comprises a coil and an iron core disposed in the coil; the magnetic part is annularly arranged on the periphery of the induction power generation assembly, the magnetic part can vibrate perpendicular to the induction power generation assembly under external vibration excitation, and when the magnetic part moves, alternating induction current is generated through rapid alternating change of the magnetic flux direction in a coil; through the iron core arranged in the coil, on one hand, a magnetic field can be guided to flow through the coil so as to increase magnetic flux and further improve the output performance, and on the other hand, the magnetic flux can be increased through the attraction force between the iron core and the magnet in the horizontal direction and towards the iron core. Under the action of the attraction force, the elastic planar cantilever beam has double potential barriers in the vibration process, when the external excitation frequency is in a wider range, vibration of the generator can be caused, and therefore collection of broadband vibration energy is achieved.

Description

Technical Field

[0001] This utility model application relates to the field of micro generator technology, and in particular to a self-driven power generation element and a micro generator. Background Technology

[0002] The numerous micro-sensors and signal transmission terminals in the Internet of Things (IoT) require a large amount of micro-energy for power. Traditional power supply methods such as batteries, solar energy, radio frequency, and triboelectricity suffer from problems such as difficult replacement, cumbersome maintenance, low power supply efficiency, and short lifespan. Harvesting weak mechanical energy from the environment to power electronic systems can free electronic devices from the constraints of battery replacement or frequent charging.

[0003] However, traditional micro-energy harvesting systems suffer from low energy density, complex manufacturing processes for microgenerators, loose structural connections, and low energy harvesting efficiency for vibrations of different frequencies. Therefore, addressing these technical shortcomings is a key focus for those skilled in the art, and designing a microgenerator with excellent output performance is crucial for achieving self-driving capabilities in electronic devices. Utility Model Content

[0004] To address the aforementioned technical deficiencies, this invention provides a self-driven power generation element and a micro generator, aiming to increase the integration of generators and, through array design, flexibly combine generators with different vibration frequencies according to different application scenarios, thereby achieving product diversity and flexibility.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a self-driven power generation element, comprising: an induction power generation component, including a coil and an iron core disposed within the coil;

[0006] A magnetic component is arranged around the outer periphery of the induction power generation component. The magnetic component can vibrate perpendicularly to the induction power generation component under external vibration excitation. When the magnetic component moves, it generates an alternating induced current by rapidly alternating the direction of the magnetic flux in the coil. A cantilever structure is used to fix the magnetic component, and the cantilever structure drives the magnetic component to vibrate perpendicularly to the induction power generation component.

[0007] Furthermore, the iron core is perpendicular to the magnetic element, and the coil is wrapped around the outside of the iron core.

[0008] Furthermore, the magnetic component includes at least two sets of magnetic blocks arranged sequentially in the vertical direction of the inductive power generation component. Each set of magnetic blocks includes an N-pole magnetic block unit and an S-pole magnetic block unit, and the N-pole magnetic block unit and the S-pole magnetic block unit are arranged alternately in the vertical direction.

[0009] Furthermore, the magnetic component includes four sets of magnetic blocks, which are arranged around the induction power generation component and respectively distributed on the upper and lower sides of the diaphragm. The N poles and S poles of the two magnetic blocks located on the upper and lower sides of the diaphragm in the same area intersect.

[0010] Furthermore, the self-driven power generation element also includes a base, the inductive power generation component is disposed on the base, the cantilever structure is a cantilever diaphragm, and the cantilever diaphragm is covered on the base.

[0011] Furthermore, the outer edge of the cantilever diaphragm is fixedly connected to the base, and at least one groove communicating with the magnetic component is provided inside the diaphragm.

[0012] Furthermore, the shape of the groove can be "L", "T", arc, or irregular.

[0013] To achieve the purpose of this solution, a micro generator is also provided, comprising at least one set of the self-driving power generation elements described above.

[0014] Furthermore, it also includes a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit that are electrically connected in sequence to the micro generator.

[0015] The first control circuit is a voltage doubler rectifier circuit, which is used to output DC power after the alternating current generated by the micro generator is rectified by voltage doubler;

[0016] The second control circuit is an undervoltage lockout circuit. When the voltage is lower than the set value, it disconnects the subsequent circuit and stops discharging to the outside.

[0017] The third control circuit is a voltage regulator circuit, used to stabilize the voltage at a corresponding preset voltage value;

[0018] The fourth control circuit is a data acquisition and wireless transmission circuit.

[0019] Furthermore, an energy storage capacitor for energy storage is electrically connected between the first control circuit and the second control circuit.

[0020] This application provides a self-driven power generation element, comprising: an induction power generation component including a coil and an iron core disposed within the coil; a magnetic component, the magnetic component being arranged around the outer periphery of the induction power generation component, the magnetic component being able to vibrate perpendicularly to the induction power generation component under external vibration excitation, and when the magnetic component moves, generating an alternating induced current through the rapid alternating change of the magnetic flux direction within the coil; and a cantilever structure for fixing the magnetic component, the cantilever structure driving the magnetic component to vibrate perpendicularly to the induction power generation component; the iron core and the magnetic component having an attractive force in the horizontal direction towards the iron core; which can increase the integration of the generator and flexibly combine generators with different vibration frequencies according to different application scenarios, realizing product diversity and flexibility.

[0021] Furthermore, by adopting the arrangement of magnetic components in this application, the magnetic field direction can be switched rapidly, thereby improving the output performance of the generator. The planar diaphragm design allows the generator to be manufactured using a variety of patterned processing techniques, increasing the variety of materials available and making the generator scale (from micrometers to meters) more flexible and diverse. The stacked assembly of each part simplifies the manufacturing process and also increases the integration of the generator. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a self-driven power generation element according to the present invention;

[0023] Figure 2 This is a schematic diagram of one arrangement of a self-driven power generation element according to the present invention;

[0024] Figure 3 This is a schematic diagram of a single arrangement of two self-driven power generation elements according to the present invention.

[0025] Figure 4 This is a structural schematic diagram illustrating one of the working principles of a self-driven power generation element according to this utility model;

[0026] Figure 5 This is a schematic diagram illustrating the working principle of a self-driven power generation element according to the present invention.

[0027] Figure 6 This is a schematic diagram of the array arrangement structure of a self-driven power generation element according to the present invention;

[0028] Figure 7 This is a schematic diagram of one type of planar elastic beam structure for a self-driven power generation element according to this utility model;

[0029] Figure 8 This is a schematic diagram of two types of planar elastic beam structures for a self-driven power generation element according to this utility model;

[0030] Figure 9 This is a schematic diagram of the framework of a self-driving system according to the present invention.

[0031] In the picture:

[0032] 1-Induction power generation component; 11-Coil; 12-Iron core; 13-Base; 2-Magnetic component; 21-Magnetic block; 211-N pole magnetic block unit; 212-S pole magnetic block unit; 3-Planar cantilever beam; 4-Micro generator; 5-First control circuit; 6-Second control circuit; 7-Third control circuit; 8-Fourth control circuit; 9-Energy storage capacitor. Detailed Implementation

[0033] To enable those skilled in the art to better understand the purpose, technical solution, and advantages of this application, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. However, the present application may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0035] As described in the background section, traditional micro-energy harvesting systems suffer from technical defects such as low energy density and poor output performance. As a result, it is difficult to effectively drive electronic systems by collecting and converting electrical energy, thus limiting the development and widespread application of self-powered systems.

[0036] In view of this, such as Figures 1-5 As shown, the present invention provides a self-driven power generation element, including: an induction power generation component 1, including a coil 11 and an iron core 12 disposed within the coil 11;

[0037] A magnetic component 2 is arranged around the outer periphery of the induction power generation component. The magnetic component 2 can vibrate perpendicularly to the induction power generation component under external vibration excitation. When the magnetic component 2 moves, it generates an alternating induced current by rapidly alternating the direction of the magnetic flux in the coil 11. A cantilever structure is used to fix the magnetic component 2. The cantilever structure drives the magnetic component to vibrate perpendicularly to the induction power generation component. In other words, the magnetic component 2 can vibrate vertically under the constraint of the planar cantilever beam 3 under external vibration excitation.

[0038] The magnetic component 2 is located above or below the inductive power generation assembly 1; the coil 11 in the inductive power generation assembly 1 is circumferentially grooved to facilitate the vertical vibration of the magnetic component 2 under the constraint of the planar cantilever beam 3. Based on the above embodiments, in one embodiment of this application, the magnetic component includes four sets of magnetic blocks, which are arranged around the inductive power generation assembly and respectively on the upper and lower sides of the diaphragm. The N and S poles of two magnetic blocks located on the upper and lower sides of the diaphragm in the same area intersect. That is, the N and S poles are arranged sequentially on the upper side of the diaphragm, while the S and N poles are arranged sequentially on the lower side of the diaphragm on the same side. Based on the above embodiments, in one embodiment of this application, the planar cantilever beam 3 is an elastic planar cantilever beam 3; under the attraction generated by the magnetic component 2, the iron core 12 forms a double potential barrier during vibration of the planar cantilever beam 3; when the magnetic component 2 moves, it generates an alternating induced current through the rapid alternating change of the magnetic flux direction in the coil 11; there is an attraction between the iron core 12 and the magnetic component 2 in the horizontal direction and towards the iron core 12.

[0039] In other words, magnetic components 2 arranged in a specific pattern are mounted on the planar cantilever beam 3. When subjected to external vibration excitation, the magnetic components 2 vibrate vertically under the constraint of the cantilever beam, generating an alternating induced current through the rapid alternating change in the direction of the magnetic flux within the coil 11. Simultaneously, the coil 11 contains an iron core 12, which, on the one hand, guides the magnetic field through the coil 11, increasing the magnetic flux and improving output performance; on the other hand, the introduction of the iron core 12 generates an attractive force with the magnetic components 2. Under the influence of this attractive force, the spring (i.e., the planar cantilever beam 3) exhibits a double potential barrier during vibration. This double potential barrier enhances the generator's response to broadband excitation, increasing its efficiency in collecting energy from vibrations of different frequencies.

[0040] Based on the above embodiments, in one embodiment of this application, such as Figure 2 As shown, the magnetic component 2 is fixedly disposed at one end of the upper side of the planar cantilever beam 3 and is located above the coil 11 in the induction power generation assembly 1.

[0041] The planar cantilever beam 3 is an elastic planar cantilever beam 3; under the attractive force generated by the magnetic component 2, the iron core 12 causes the planar cantilever beam 3 to form a double potential barrier during vibration; the planar cantilever beam 3 is a planar elastic diaphragm; the planar elastic diaphragm can be set with different types or sizes of graphic patterns. By adopting a planar diaphragm design, the generator of this application can be manufactured through a variety of graphic processing techniques, increasing the variety of materials available and making the generator scale (from micrometers to meters) more flexible and diverse.

[0042] In addition, such as Figures 7-8 As shown, the planar diaphragm of this application can be fabricated into generators of different sizes using different patterning processes (such as laser cutting or photolithography). This results in a vibratory generator flat plate structure that can be easily cut and expanded according to different application scenarios. Specifically, the outer edge of the cantilever diaphragm is fixedly connected to the base, and at least one groove communicating with the magnetic component is formed within the diaphragm. The groove is composed of patterned units, and the shape of the groove can be "L", "T", arc, or irregular; that is, the shape of each patterned unit has a certain regularity, and the outline presents a free-form shape, usually various shapes expressed by laser cutting or photolithography. Specifically, when the patterned unit is "L", the grooves are mirror-symmetrical, and the "L" blocks of the patterned units in the groove are arranged parallel at their ends. When the patterned unit is "T", the grooves are also mirror-symmetrical, and the "T" blocks of the patterned units in the groove are connected by "W" shaped patterned units, with the patterned units arranged parallel at the connection points.

[0043] In this embodiment, the irregular shape refers to a shape without fixed rules, whose boundaries and shape may be complex, tortuous, or irregular. Compared to traditional regular shapes such as circles, triangles, and squares, the characteristic of irregular shapes lies in the irregularity of their shape and boundaries; that is, irregular shapes do not have fixed rules in space, and their shapes and boundaries can be intricate and disordered, or unique and peculiar, possessing strong individuality and visual impact; irregular shapes can be various polygons, circles, curves, etc., and are not specifically limited in this embodiment.

[0044] The cantilever diaphragm structure consists of at least one patterned unit; the patterned unit is composed of four parallel 7-shaped blocks at their ends. Based on the above embodiment, in another embodiment of this application, the patterned unit is composed of eight interlocking concave blocks at their ends; the patterned unit is mirror-symmetrical.

[0045] Based on the above embodiments, in another embodiment of this application, such as Figure 3 As shown, the magnetic components 2 are fixedly disposed on the upper and lower sides of the planar cantilever beam 3, respectively; and the magnetic components 2 on the upper and lower sides of the same end of the planar cantilever beam 3 are located on the same vertical plane. The planar cantilever beam 3 is an elastic planar cantilever beam 3; under the attractive force generated by the magnetic components 2, the iron core 12 causes the planar cantilever beam 3 to form a double potential barrier during vibration.

[0046] Based on the above embodiments, in one embodiment of this application, the magnetic component 2 includes at least two sets of magnetic blocks 21 arranged sequentially in the vertical direction of the induction power generation component 1. Each set of magnetic blocks 21 includes an N-pole magnetic block unit 211 and an S-pole magnetic block unit 212, which are arranged alternately in the vertical direction. The N-pole magnetic block unit 211 and the S-pole magnetic block unit 212 in each set of magnetic blocks 21 are distributed in the vertical direction. In this application, the arrangement of the magnetic blocks allows for rapid switching of the magnetic field direction, thereby improving the output performance of the generator.

[0047] When the magnetic component 2 includes two or more sets of magnetic blocks 21, the number of sets of magnetic blocks 21 can be two, three, four, etc. In this embodiment, the number of magnetic blocks in the magnetic component 2 is not limited and can be set by oneself. Two or more sets of magnetic blocks 21 cutting magnetic field lines at the same time can increase the current, thereby increasing the power generation efficiency.

[0048] like Figure 6 As shown, the micro-generator is a power generation array that collects frequency vibration energy by arbitrarily combining generators with different operating frequencies. That is, generators with different operating frequencies can be arbitrarily combined to form a power generation array that collects frequency vibration energy; by adopting an array design, generators with different vibration frequencies can be flexibly combined according to different application scenarios, realizing product diversity and flexibility.

[0049] To achieve the objectives of this application, a self-driving system is also provided, such as... Figure 9 As shown, the system is applied to the microgenerator 4; the system includes a microgenerator 4 for converting mechanical energy in the environment into electrical energy and outputting alternating induced current, and a first control circuit 5, a second control circuit 6, a third control circuit 7, and a fourth control circuit 8 connected to the microgenerator 4 in sequence; wherein, the first control circuit 5 is a voltage doubler rectifier circuit, used to output direct current after the alternating current generated by the microgenerator 4 is rectified by voltage doubler; the alternating induced current output by the microgenerator 4 can be rectified into boosted direct current through the first control circuit 5; the direct current can be stored in an energy storage capacitor 9 electrically connected between the first control circuit 5 and the second control circuit 6.

[0050] The electrical energy in the energy storage capacitor 9 can be controlled to discharge in real time through the second control circuit 6, which controls the external discharge operation. Specifically, the second control circuit 6 is an undervoltage lockout circuit. When the voltage is lower than the set value, it disconnects the subsequent circuit and stops external discharge. The third control circuit 7 is a voltage regulator circuit, which is used to stabilize the voltage at the corresponding preset voltage value. That is to say, the third control circuit 7 can stabilize the voltage at a specific value. The fourth control circuit 8 is a power consumption unit with certain functions, which is mainly a data acquisition and wireless transmission circuit.

[0051] In summary, this application proposes a self-driven power generation element and micro-generator. The system comprises a vibration system formed by the inertia of the magnetic component 2 and the elasticity of the cantilever beam. Under external vibration excitation, the magnetic component 2 vibrates vertically. The alternating direction of the magnetic flux within the coil 11 of the induction power generation component 1 generates an alternating induced current. Simultaneously, the iron core 12 inside the coil 11 guides the magnetic field through the coil 11, increasing the magnetic flux and thus improving output performance. Furthermore, the iron core 12 attracts the magnetic component 2, creating a double potential barrier on the spring (i.e., the elastic planar cantilever beam 3) during vibration. This double potential barrier expands the generator's response frequency, meaning that the generator can vibrate over a wider range of external excitation frequencies, thereby achieving the collection of broadband vibration energy.

[0052] Furthermore, the microgenerator of this application has a simple structure and is easy to mass-produce. Different types of arrays can be assembled according to the application scenario and power demand to meet the needs of multi-directional, multi-frequency vibration energy harvesting. Moreover, the spring structure of the microgenerator array of this application can be integrally fabricated using patterning methods such as laser cutting and photolithography; therefore, the number of arrays does not increase the fabrication difficulty or cost.

[0053] The micro-generator provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A self-driven power generation element, characterized in that, include: An induction power generation component includes a coil and an iron core disposed within the coil; A magnetic component is arranged around the outer periphery of the induction power generation component. The magnetic component can vibrate perpendicularly to the induction power generation component under external vibration excitation. When the magnetic component moves, it generates an alternating induced current by rapidly alternating the direction of the magnetic flux in the coil. A cantilever structure is also provided for fixing the magnetic component. The cantilever structure drives the magnetic component to vibrate perpendicularly to the induction power generation component. The iron core and the magnetic component have an attractive force in the horizontal direction toward the iron core, so that the cantilever structure forms a double potential barrier during vibration. The iron core is perpendicular to the vibration direction of the magnetic component, and the coil is wrapped around the outside of the iron core; the magnetic component includes at least two sets of magnetic blocks arranged sequentially in the vertical direction of the induction power generation component, each set of magnetic blocks including an N-pole magnetic block unit and an S-pole magnetic block unit, the N-pole magnetic block unit and the S-pole magnetic block unit are arranged alternately in the vertical direction.

2. The self-driven power generation element according to claim 1, characterized in that, The magnetic component includes four sets of magnetic blocks, which are arranged around the induction power generation component and respectively on the upper and lower sides of the diaphragm. The N and S poles of the two magnetic blocks located on the upper and lower sides of the diaphragm in the same area intersect.

3. The self-driven power generation element according to claim 1, characterized in that, It also includes a base, on which the inductive power generation component is mounted, and the cantilever structure is a cantilever diaphragm, which is covered on the base.

4. A self-driven power generation element according to claim 3, characterized in that, The outer edge of the cantilever diaphragm is fixedly connected to the base, and at least one groove communicating with the magnetic component is provided inside the diaphragm.

5. A self-driven power generation element according to claim 4, characterized in that, The groove can be L-shaped, T-shaped, arc-shaped, or irregular in shape.

6. A micro generator, characterized in that, The microgenerator includes a self-driven power generation element as described in any one of claims 1 to 5.

7. A micro generator according to claim 6, characterized in that, It also includes a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit that are electrically connected in sequence to the micro generator; The first control circuit is a voltage doubler rectifier circuit, which is used to output DC power after the alternating current generated by the micro generator is rectified by voltage doubler; The second control circuit is an undervoltage lockout circuit. When the voltage is lower than the set value, it disconnects the subsequent circuit and stops discharging to the outside. The third control circuit is a voltage regulator circuit, used to stabilize the voltage at a corresponding preset voltage value; The fourth control circuit is a data acquisition and wireless transmission circuit.

8. A micro generator according to claim 7, characterized in that, An energy storage capacitor is electrically connected between the first control circuit and the second control circuit for energy storage.

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