CN103546058A - A compound generator based on the principle of electromagnetic and friction - Google Patents

Abstract

The invention relates to the field of micro energy, in particular to a composite type electric generator based on an electromagnetism and friction principle. The composite type electric generator comprises a shell, a top mass block, a top permanent magnet, a friction layer, a metal coil and a bottom permanent magnet, wherein the top mass block, the top permanent magnet, the friction layer, the metal coil and the bottom permanent magnet are arranged in the shell from top to bottom. The shell is of a cylinder shape, the top mass block, the top permanent magnet, the friction layer, the metal coil and the bottom permanent magnet are all cylindrical, and a film wraps the metal coil. The composite type electric generator has the advantages that the composite type electric generator replaces a traditional battery to supply power for a lower-power-consumption electronic component, mutual advantage compensation of an electromagnetic generator and a friction type generator is achieved, energy conversion efficiency of the generator is improved, reliability is high, the separating speed is high, the structure of the component is simplified, and large-scale production is facilitated.

Description

A compound generator based on the principle of electromagnetic and friction

technical field

The invention relates to the field of micro energy, in particular to a compound generator based on the principle of electromagnetic and friction.

Background technique

In recent years, the world energy crisis has made the research and application of new energy increasingly urgent. Therefore, energy harvesting technology has received extensive attention. Energy harvesting technology is to collect energy in the environment and convert it into electrical energy for use. Devices for collecting solar energy and wind energy, such as solar cells and windmills, have been industrialized. In contrast, the existence of vibration energy in the environment is more stable and widely distributed. In 2012, the first nanogenerator based on the friction principle was successfully prepared and achieved high-performance output [Wang, Z.L. et al. Nano energy, vol.1, pp.328, 2012]. Subsequently, nanogenerators based on the friction principle developed rapidly, and the output energy density continued to increase, and they were widely used in energy harvesting, self-powered systems and other fields.

The nanogenerator based on the principle of friction has a high output voltage. After reasonable design, the output voltage can be as high as thousands of volts. However, the output current of the triboelectric nanogenerator is very small, generally in the microampere level, and cannot be used in some occasions that require large currents. In addition, the matching load of the triboelectric nanogenerator is too high, generally in the megohm level, and cannot efficiently supply energy to devices with small internal resistance. Compared with friction generators, electromagnetic generators based on Faraday's law of electromagnetic induction have the characteristics of high output current and low matching load. Its output characteristics are just opposite to those of friction generators. Therefore, combining the two mechanisms to achieve complementary advantages can not only improve the energy conversion efficiency, but also broaden the application range of the device.

Contents of the invention

In order to solve the above problems, the present invention provides a compound generator based on the principle of electromagnetism and friction, including the following technical solutions: comprising a casing, characterized in that: a top mass block, a top permanent magnet, a friction Layer, metal coil and bottom permanent magnet, the shell is cylindrical, the top mass block, top permanent magnet, friction layer, metal coil, and bottom permanent magnet are all cylindrical, with diameters smaller than the inner diameter of the shell, and the metal coil is wrapped with a film.

The shell is made of plastic or glass; the inside diameter of the shell is 5mm-30mm, the outside diameter is 1mm-5mm wider than the inside diameter, and the height is 5mm-50mm.

The top mass is made of metallic iron or metallic copper or alloy material or other materials with high density, and the mass of the top mass is 1g-50g.

Both the top permanent magnet and the bottom permanent magnet are neodymium iron boron.

The friction layer is made of silicone rubber or polyamide fiber or metal material or other electronically volatile materials.

The metal coil is metal copper; the wire width of the metal coil is 80 μm-200 μm, the spacing is 80 μm-200 μm, and the height is 10 μm-40 μm.

The material of the film is polyimide, and the thickness of the film is 20 μm-50 μm.

The present invention has the advantage that:

1. The composite generator based on the principle of electromagnetic and friction proposed by the present invention adopts a cylindrical structure, which is similar in shape to traditional batteries, and can be used as a substitute for traditional batteries to supply energy for low-power electronic devices.

2. The composite generator proposed by the present invention combines the principle of electromagnetic induction with the principle of friction electrification-static induction, realizes the complementary advantages of the electromagnetic generator and the friction generator, and improves the energy conversion efficiency of the generator.

3. The composite generator based on the principle of electromagnetic and friction proposed by the present invention can quickly separate the two friction materials through electromagnetic repulsion. Compared with the traditional mechanical separation method, it has stronger reliability and faster separation speed.

4. The composite generator based on the principle of electromagnetic and friction proposed by the present invention uses a copper coil as the bottom electrode of the friction generator, and a permanent magnet as the top electrode of the friction generator, which simplifies the structure of the device and is conducive to large-scale production.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of compound generator of the present invention;

Fig. 2 is a sectional view of the composite generator of the present invention;

Fig. 3 is the composite generator bottom view of the present invention;

Fig. 4 is a side view of the composite generator metal coil and surrounding polyimide structure of the present invention;

Fig. 5 is the output voltage of the electromagnetic part of the composite generator of the present invention, and the output voltage peak value is about 10mV;

Fig. 6 is the output voltage of the friction part of the composite generator of the present invention, and the peak value of the output voltage is about 20V.

Detailed ways

A more complete and better understanding of the invention, and many of its attendant advantages, will readily be learned by reference to the following detailed description when considered in conjunction with the accompanying drawings, but the accompanying drawings illustrated herein are intended to provide a further understanding of the invention and constitute part of the invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Embodiment: As shown in Figures 1 to 6, it includes a housing 1, a top mass block 2, a top permanent magnet 3, a friction layer 4, a metal coil 5, a film 6, and a bottom permanent magnet 7,

The shell 1 is made of polytetrafluoroethylene (PTFE), the inner diameter of the shell 1 is preferably 20 mm, the outer diameter is preferably 2 mm, and the height is preferably 25 mm;

The uppermost layer of the shell 1 is equipped with a top mass block 2, the top mass block 2 is made of metal iron, and the mass is preferably 30g;

The top permanent magnet 3 is installed under the top mass 2, which is made of neodymium-iron-boron (NdFeB) material;

A friction layer 4 of silicon rubber material is installed under the top permanent magnet 3;

A metal coil 5 is installed under the friction layer 4, the material of the metal coil 5 is metal copper, the width of the metal coil 5 is preferably 150 μm, the spacing is preferably 100 μm, and the height is preferably 30 μm;

The metal coil 5 is covered with a thin film 6, the material of the thin film 6 is polyimide (PI), and the thickness of the thin film 6 is preferably 35 μm.

The bottom permanent magnet 7 is installed under the metal coil 5, which is made of neodymium-iron-boron (NdFeB) material;

Electromagnetic repulsion is provided by the top permanent magnet 3 and the bottom permanent magnet 8 with opposite polarities, so that the two friction surfaces are separated rapidly, and an electrical output based on friction is generated. At the same time, the flexible printed circuit board technology is used to prepare the metal coil 5, so that the top permanent magnet 3 and the bottom permanent magnet 8 move while generating an induced voltage in the metal coil 5, thereby improving the energy conversion efficiency of the composite generator.

A compound generator based on the principle of electromagnetic and friction provided by the present invention has been introduced in detail above, and an exemplary embodiment of the present application has been described above with reference to the accompanying drawings. It should be understood by those skilled in the art that the above-mentioned embodiments are only examples for the purpose of illustration, and are not used for limitation. Any modifications, equivalent replacements, etc. All should be included in the protection scope of this application.

Claims (7)

1. A compound generator based on electromagnetic and friction principles, comprising a shell, is characterized in that: the shell is provided with a top quality block, a top permanent magnet, a friction layer, a metal coil and a bottom permanent magnet from top to bottom, and the shell is in the form of Cylindrical, the top quality block, the top permanent magnet, the friction layer, the metal coil and the bottom permanent magnet are all cylindrical, with diameters smaller than the inner diameter of the shell, and the metal coil is wrapped with a film. 2. A composite generator based on the principle of electromagnetic and friction according to claim 1, characterized in that: the housing is made of plastic or glass; the inner diameter of the housing is 5mm-30mm, and the outer diameter is 1mm-30mm wider than the inner diameter 5mm, the height is 5mm-50mm. 3. A compound generator based on the principle of electromagnetic and friction according to claim 1, characterized in that: the top mass is made of metallic iron or metallic copper or alloy materials or other denser materials, and the top mass The block mass is 1g-50g. 4. A compound generator based on the principle of electromagnetic and friction according to claim 1, characterized in that: the top permanent magnet and the bottom permanent magnet are both NdFeB. 5. A compound generator based on the principle of electromagnetic and friction according to claim 1, characterized in that: the friction layer is made of silicone rubber or polyamide fiber or metal material or other electronically volatile materials. 6. A compound generator based on the principle of electromagnetic and friction according to claim 1, characterized in that: the metal coil is metal copper; the wire width of the metal coil is 80 μm-200 μm, the spacing is 80 μm-200 μm, and the height 10μm-40μm. 7. A compound generator based on the principle of electromagnetic and friction according to claim 1, characterized in that: the material of the film is polyimide, and the thickness of the film is 20 μm-50 μm.

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