Micro generator

Abstract

The utility model is suitable for the field of miniature power generation equipment, and provides a miniature generator which comprises a magnetic vibrator and a coil which are oppositely arranged, and the magnetic vibrator can move to generate induction current in the coil; the miniature generator further comprises a semiconductor and a super-sliding piece which are arranged between the magnetic vibrator and the coil, the super-sliding piece is arranged on the surface, facing the coil, of the magnetic vibrator, and when the magnetic vibrator moves, the super-sliding piece rubs with the semiconductor to generate current. The micro generator provided by the utility model can effectively improve the power generation efficiency.

Description

Technical Field

[0001] The present application belongs to the field of micro power generation equipment, and in particular relates to a micro generator. Background Art

[0002] By harvesting weak mechanical energy from the environment to power electronic systems, electronic devices can be freed from the constraints of frequent battery replacement or charging. Electromagnetic power generation is a relatively mature technology. Electromagnetic vibration energy harvesters offer a promising future, characterized by their relatively simple structure, miniaturization, high sensing frequency, and the absence of a power source. These harvesters can be used in a variety of harsh environments.

[0003] However, traditional electromagnetic vibration energy harvesters have the problem of low power generation efficiency and are difficult to effectively drive electronic systems, which limits the development and widespread application of electromagnetic vibration energy harvesters. Utility Model Content

[0004] The purpose of this application is to overcome the deficiencies of the above-mentioned prior art and to provide a micro generator, which aims to solve the problem of low power generation efficiency of existing electromagnetic vibration energy harvesters.

[0005] The present application provides a micro-generator, comprising a magnetic vibrator and a coil arranged relative to each other, wherein the magnetic vibrator is capable of moving to generate an induced current in the coil; the micro-generator also comprises a semiconductor and a super-slippery member arranged between the magnetic vibrator and the coil, wherein the super-slippery member is arranged on the surface of the magnetic vibrator facing the coil, and when the magnetic vibrator moves, the super-slippery member rubs against the semiconductor to generate current.

[0006] Optionally, the friction surface between the semiconductor and the super-slipper is a plane.

[0007] Optionally, the magnetic vibrator and the coil are arranged vertically, and the magnetic vibrator can move in a horizontal direction to generate an induced current in the coil.

[0008] Optionally, the micro-generator further includes an elastic member, which acts on the magnetic vibrator and undergoes elastic deformation when the magnetic vibrator moves.

[0009] Optionally, the elastic member is a cantilever beam structure, and the magnetic vibrator is provided at the free end of the elastic member.

[0010] Optionally, the elastic member is plate-shaped and its plate surface is perpendicular to the movement direction of the magnetic vibrator.

[0011] Optionally, there are an even number of the magnetic vibrators and they are symmetrically arranged on both sides of the elastic member.

[0012] Optionally, the elastic member is made of a conductive material, and the super-slip member is electrically connected to the energy management circuit through the elastic member.

[0013] Optionally, the super-sliding member is a sheet-like structure and is connected to the elastic member at the center line of the super-sliding member.

[0014] Optionally, the elastic member is made of superelastic material.

[0015] Optionally, the micro-generator includes a PCB board, and the elastic member is fixed to the PCB board via a connecting member;

[0016] The PCB board is provided with an avoidance hole for the coil to be placed from one side of the PCB board, the side of the semiconductor is overlapped with the edge of the avoidance hole, and the coil and the magnetic vibrator are respectively arranged on both sides of the semiconductor;

[0017] The coil, the semiconductor and the super-slider are all electrically connected to the PCB board.

[0018] The micro-generator provided by the present application has a magnetic vibrator that can move under the vibration excitation of the external environment. When the magnetic vibrator moves, due to its own magnetic characteristics, it causes a change in magnetic flux in the coil, generates an induced current, and generates current through friction between the super-slippery part and the semiconductor on it. The reasonable superposition of the two power generation methods achieves enhanced output performance. In addition, the introduction of the super-slippery part, due to its extremely low friction and wear, gives the generator a nearly unlimited service life, and can reduce the distance between the magnet and the coil without affecting the vibration effect of the magnet, so that electromagnetic power generation produces a higher voltage and current. As described above, the micro-generator provided by the present application can effectively improve the power generation efficiency of the micro-generator and promote its development and widespread application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a schematic structural diagram of a generator according to an embodiment of the present application;

[0021] Figure 2 yes Figure 1 Schematic diagram of the local structure of the structure;

[0022] Figure 3 yes Figure 2 Schematic diagram of the disassembly of the structure.

[0023] Description of Figure Numbers:

[0024] 10. Micro generator; 11. Magnetic vibrator; 12. Coil; 13. Semiconductor; 14. Super-slip member; 15. Elastic member; 16. PCB board; 101. Avoidance hole; 17. Housing; 18. Power terminal. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0026] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0027] It should also be noted that, in the embodiment of the present application, Figure 1 The XYZ rectangular coordinate system established in the definition is: the side located in the positive direction of the X axis is defined as the front, and the side located in the negative direction of the X axis is defined as the back; the side located in the positive direction of the Y axis is defined as the left, and the side located in the negative direction of the Y axis is defined as the right; the side located in the positive direction of the Z axis is defined as the top, and the side located in the negative direction of the Z axis is defined as the bottom.

[0028] It should also be noted that the directional terms such as left, right, up and down in the embodiments of the present application are merely relative concepts or are based on the normal use status of the product, and should not be considered as restrictive.

[0029] Please combine Figures 1 to 3 The micro-generator 10 provided by the present application is now described in an exemplary manner. The micro-generator 10 includes a magnetic vibrator 11 and a coil 12 that are arranged opposite to each other. The magnetic vibrator 11 can move to generate an induced current in the coil 12.

[0030] The magnetic vibrator 11 can be a magnet. When excited by vibrations in the external environment, the magnet moves relative to the coil 12, causing the magnetic flux of the coil 12 to change. This generates an induced current according to Faraday's law of electromagnetic induction. The induced current is output through a wire and collected by an energy management circuit.

[0031] The micro-generator 10 further includes a semiconductor 13 and a super-slipper 14 disposed between the magnetic vibrator 11 and the coil 12. The super-slipper 14 is disposed on the surface of the magnetic vibrator 11 facing the coil 12. When the magnetic vibrator 11 moves, relative movement occurs between the super-slipper 14 and the semiconductor 13 to generate current.

[0032] Optionally, the surface of semiconductor 13 facing the superslipper 14 is atomically flat, creating superslip and Schottky contact between the superslipper 14 and semiconductor 13. This allows for extremely low friction and wear-free relative motion between magnetic oscillator 11 and coil 12. When relative sliding occurs between the superslipper 14 and semiconductor 13, a dynamic Schottky junction generates non-equilibrium carrier movement, resulting in a stable, high-density DC signal output. Furthermore, due to the superslippery contact between the superslipper 14 and semiconductor 13, the van der Waals interaction surface at the interface has a nearly 100% effective contact area, enabling stable, high-density output. Furthermore, due to the ultraslippery, extremely low-friction, and wear-free nature of the structure, a nearly unlimited lifespan is achieved. Due to the low friction, energy loss is minimal, resulting in an extremely low external force requirement, allowing for application in extremely weak environments. This approach to 100% conversion efficiency effectively resolves the trade-off between wear, service life, and output density associated with conventional Schottky microgenerators, revolutionizing the technology behind these devices.

[0033] Of course, depending on the actual situation, the super-slipper 14 can also directly adopt an element with generally extremely low friction and wear characteristics. The super-slipper 14 and the semiconductor 13 form friction nano-power generation to generate current, which is not the only limitation here.

[0034] Optionally, the magnetic vibrator 11 and the coil 12 of the micro-generator 10 may be directly suspended in the air. In this case, the super-slider 14 and the semiconductor 13 are not in contact and no additional current is generated.

[0035] It is understood that the energy management circuit includes a rectifier circuit. The induced current generated by the magnetic vibrator 11 and coil 12, as well as the current generated by the friction between the superslider 14 and the semiconductor 13, is collected by the rectifier circuit and stored in the energy storage capacitor. The energy in the capacitor is then stabilized by a back-end LDO or other management circuit to output a stable voltage value. The energy management circuit can selectively adopt existing energy management circuits in the prior art and is not intended to be exclusive here.

[0036] The micro-generator 10 provided in this embodiment has a magnetic vibrator 11 that can move under the vibration excitation of the external environment. When the magnetic vibrator 11 moves, its inherent magnetic characteristics cause a change in magnetic flux in the coil 12, generating an induced current. This in turn generates current through friction between the super-slipper 14 and the semiconductor 13 on the super-slipper 11. The rational superposition of these two power generation methods enhances output performance. In addition, the introduction of the super-slipper 14, due to its extremely low friction and wear, gives the generator a nearly unlimited service life. It can also reduce the distance between the magnet and the coil 12 without affecting the magnet's vibration effect, allowing electromagnetic power generation to produce a higher voltage and current.

[0037] In another embodiment of the present application, the magnetic vibrator 11 and the coil 12 are arranged vertically, and the magnetic vibrator 11 can move in the horizontal direction to generate an induced current in the coil 12. Figure 3 , the magnetic vibrator 11, the superslippery member 14, the semiconductor 13 and the coil 12 are arranged in sequence from top to bottom. The magnetic vibrator 11 is block-shaped, and its lower surface is covered with the superslippery member 14. The semiconductor 13 is generally plate-shaped, and its upper surface is in contact with the superslippery member 14. The contact between the semiconductor 13 and the superslippery member 14 is surface contact, so that a larger contact friction surface is formed between the two, which is conducive to increasing the amount of current generated by friction. In this embodiment, the friction surface between the semiconductor 13 and the superslippery member 14 is a plane. In other embodiments, the friction surface between the semiconductor 13 and the superslippery member 14 can also be set as a curved surface as needed, which is not the only limitation here.

[0038] The coil 12 is located below the semiconductor 13. The coil 12 and the semiconductor 13 are relatively fixed. Preferably, the coil 12 and the semiconductor 13 abut against each other, thereby effectively reducing the distance between the coil 12 and the magnetic vibrator 11 and thus facilitating an increase in the amount of current generated by electromagnetic induction.

[0039] In another embodiment of the present application, please refer to Figure 2 Micro-generator 10 also includes an elastic member 15, which acts on magnetic vibrator 11 and undergoes elastic deformation when magnetic vibrator 11 moves. When magnetic vibrator 11 is displaced by external vibration excitation, elastic member 15 elastically deforms and resets magnetic vibrator 11 after the external vibration excitation disappears. The provision of elastic member 15 limits the range of motion of magnetic vibrator 11, allowing it to move within areas with dense magnetic induction lines. This effectively increases the amount of current generated by the coil, thereby improving generator performance.

[0040] In another embodiment of the present application, please refer to Figure 2 , the elastic member 15 is a cantilever beam structure, and the magnetic vibrator 11 is arranged at the free end of the elastic member 15. Taking the magnetic vibrator 11 and the coil 12 arranged up and down as an example, the elastic member 15 extends forward and backward, and the free end has the freedom to move in the left and right directions. When excited by the vibration of the external environment, the magnetic vibrator 11 moves and applies a concentrated load to the free end of the elastic member 15. Under the action of the concentrated load, the free end vibrates left and right and drives the magnetic vibrator 11 to move left and right. In other words, the elastic member 15 limits the freedom of movement of the magnetic vibrator 11 and can affect and change the vibration amplitude and frequency of the magnetic vibrator 11. Those skilled in the art can set the size, thickness and other fixed values ​​of the elastic member 15 to generate generators with different resonant frequencies as needed to adapt to application scenarios of low frequency and large amplitude and high frequency and small amplitude.

[0041] In another embodiment of the present application, please refer to Figure 3The elastic member 15 is plate-shaped, with its surface perpendicular to the direction of motion of the magnetic vibrator 11. The elastic member 15 is a long, strip-shaped plate, its fixed end being clamped and secured by two connecting members. The magnetic vibrator 11 is block-shaped, with two side surfaces fixed to the free end of the elastic member 15. The plate-shaped configuration of the elastic member 15 provides a flat mounting surface that facilitates assembly and improves the secureness of the connection. More importantly, the elastic member 15 is a vertical plate-shaped structure with strong resistance to twisting and vertical bending, ensuring that the magnetic vibrator 11 can move linearly in the horizontal direction.

[0042] In another embodiment of the present application, there are an even number of magnetic vibrators 11 disposed on the left and right sides of the elastic member 15 . Figure 2 In the illustrated structure, there are two magnetic vibrators 11 of equal size, symmetrically arranged about the extension line of the elastic member 15. This arrangement places the center of gravity of the magnetic vibrators 11 on the elastic member 15, thus preventing distortion of the elastic member 15 caused by differential torque on either side. In other embodiments, the number of magnetic vibrators 11 may be four, six, or the like.

[0043] In another embodiment of the present application, the elastic member 15 is made of a conductive material, and the superslider 14 is electrically connected to the energy management circuit via the elastic member 15. The elastic member 15 is a metal member that not only provides support and elastic force for the magnetic oscillator 11, but also acts as a conductor to guide the current from the superslider 14 to the energy management circuit. This arrangement can simplify the structure and design.

[0044] In the illustrated structure, the superslipper 14 is a separate sheet-like structure in a rectangular or square shape, with its left-right centerline coinciding with the elastic member 15 to ensure that its center of gravity coincides with the elastic member 15. The magnetic vibrator 11 is located within the right angle region enclosed by the elastic member 15 and the superslipper 14.

[0045] In another embodiment of this application, please combine Figure 1 and Figure 3 Micro-generator 10 includes a housing 17. Housing 17 measures only 44*40.5*14.5 mm (when encapsulated). Housing 17 provides protection and secure support for micro-generator 10. Micro-generator 10 also includes a PCB 16 with power terminals 18. The main body of PCB 16 is housed within the housing, while power terminals 18 are exposed outside of housing 17 for connection to external electrical devices to provide power to them.

[0046] The PCB board 16 has an energy management circuit built in. The semiconductor 13 and the super slider 14 are electrically connected to the energy management circuit for power supply. The coil 12 is electrically connected to the energy management circuit for power supply.

[0047] Magnetic vibrator 11 is fixed to the free end of elastic member 15, and the fixed end of elastic member 15 is fixed to PCB board 16 via a connector. Superslider 14 on magnetic vibrator 11 is connected to elastic member 15 and electrically connected to the energy management circuit of PCB board 16 through elastic member 15.

[0048] The PCB 16 has a clearance hole 101 on the side facing away from the power terminals 18 for the coil 12 to be placed in. The semiconductor 13 is arranged in the clearance hole 101 and its end is mounted on the PCB 16. The provision of the clearance hole 101 makes the internal structure of the generator compact and is conducive to the miniaturization of the generator.

[0049] The housing 17 consists of a casing with an opening and a cover for sealing the opening. During assembly, the coil 12 is placed within the casing, while the magnetic oscillator 11, semiconductor 13, and elastic member 15 are secured to the PCB 16. The PCB 16 is then inserted into the casing, with its electrical terminals 18 exposed. At this point, the coil 12 is positioned within the clearance hole 101, facing the magnetic oscillator 11. Finally, the cover is secured to the casing, completing the generator assembly.

[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A micro generator, characterized in that: The micro-generator comprises a magnetic vibrator and a coil arranged relatively to each other, wherein the magnetic vibrator can move to generate an induced current in the coil; the micro-generator further comprises a semiconductor and a super-slippery member arranged between the magnetic vibrator and the coil, wherein the super-slippery member is arranged on the surface of the magnetic vibrator facing the coil, and when the magnetic vibrator moves, the super-slippery member rubs against the semiconductor to generate current.

2. The micro-generator according to claim 1, wherein: The friction surface between the semiconductor and the super-slipper is a plane.

3. The micro-generator according to claim 1 or 2, characterized in that: The micro-generator further includes an elastic member, which acts on the magnetic vibrator and undergoes elastic deformation when the magnetic vibrator moves.

4. The micro-generator according to claim 3, wherein: The elastic member is a cantilever beam structure, and the magnetic vibrator is arranged at the free end of the elastic member.

5. The micro-generator according to claim 4, characterized in that: The elastic member is plate-shaped and its plate surface is perpendicular to the moving direction of the magnetic vibrator.

6. The micro-generator according to claim 5, characterized in that: The magnetic vibrators are in an even number and are symmetrically arranged on both sides of the elastic member.

7. The micro-generator according to claim 3, wherein: The elastic member is made of a conductive material, and the super-slip member is electrically connected to the energy management circuit through the elastic member.

8. The micro-generator according to claim 3, wherein: The super-slippery piece is a sheet-like structure and is connected to the elastic piece at the center line of the super-slippery piece.

9. The micro-generator according to claim 3, wherein: The elastic member is made of superelastic material.

10. The micro-generator according to claim 3, wherein: The micro-generator includes a PCB board, and the elastic member is fixed to the PCB board through a connecting member; The PCB board is provided with an avoidance hole for the coil to be placed from one side of the PCB board, the side of the semiconductor is overlapped with the edge of the avoidance hole, and the coil and the magnetic vibrator are respectively arranged on both sides of the semiconductor; The coil, the semiconductor and the super-slider are all electrically connected to the PCB board.

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