CN-224233525-U - Self-driven power generation element and micro-generator

CN224233525UCN 224233525 UCN224233525 UCN 224233525UCN-224233525-U

Abstract

The utility model discloses a self-driven power generation element and a micro-generator, wherein the self-driven power generation element comprises an induction power generation assembly, a magnetic part and a magnetic part, the induction power generation assembly comprises a coil and an iron core arranged 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 the excitation of external vibration, when the magnetic part moves, alternating induction current is generated through the rapid alternating change of the magnetic flux direction in the coil, the iron core arranged in the coil can guide a magnetic field to flow through the coil so as to increase the magnetic flux and further improve the output performance, and on the other hand, the iron core and the magnet are provided with attractive force which is in the horizontal direction and faces the iron core, so that an elastic plane cantilever beam has a double potential barrier in the vibration process under the effect of the attractive force, and when the external excitation frequency is in a wider range, the vibration of the generator can be caused, and the collection of broadband vibration energy is realized.

Inventors

NIE JINHUI
PENG DELI
LIU YING

Assignees

深圳清华大学研究院

Dates

Publication Date: 20260512
Application Date: 20241209

Claims (8)

1. The self-driven power generation element is characterized by comprising an induction power generation assembly, a power generation assembly and a power generation assembly, wherein the induction power generation assembly comprises a coil and an iron core arranged in the coil; The magnetic part is arranged on the periphery of the induction power generation assembly in a surrounding mode, can vibrate perpendicular to the induction power generation assembly under the excitation of external vibration, generates alternating induction current through rapid alternating change of the magnetic flux direction in the coil when the magnetic part moves, and is used for fixing the cantilever structure of the magnetic part, and the cantilever structure drives the magnetic part to vibrate perpendicular to the induction power generation assembly, wherein attractive force in the horizontal direction and towards the iron core is arranged between the iron core and the magnetic part, and double potential barriers are formed in the vibration process of the cantilever structure; The magnetic part comprises at least two groups of magnetic blocks which are sequentially arranged in the vertical direction of the induction power generation assembly, each group of magnetic blocks comprises an N-pole magnetic block unit and an S-pole magnetic block unit, and the N-pole magnetic block units and the S-pole magnetic block units are alternately arranged in the vertical direction.
2. The self-driven power generation element according to claim 1, wherein the magnetic component comprises four groups of magnetic blocks, the magnetic blocks are arranged around the induction power generation assembly and are respectively arranged on the upper side and the lower side of the vibrating diaphragm, and the N pole and the S pole of the two magnetic blocks located on the upper side and the lower side of the vibrating diaphragm in the same area are intersected.
3. The self-driven power generation element according to claim 1, further comprising a base, wherein the induction power generation assembly is disposed on the base, the cantilever structure is a cantilever diaphragm, and the cantilever diaphragm is disposed on the base.
4. A self-driven power generating element according to claim 3, wherein the outer edge of the cantilever diaphragm is fixedly connected to the base, and at least one groove connected to the magnetic member is formed in the diaphragm.
5. A self-driven power generating element as described in claim 4, wherein said recess has a shape of "L", "T", arc, or irregular shape.
6. A micro-generator comprising a self-driven power generating element according to any one of claims 1 to 5.
7. The micro-generator of claim 6, further comprising a first control circuit, a second control circuit, a third control circuit, and a fourth control circuit electrically connected in sequence to the micro-generator; The first control circuit is a voltage-multiplying rectifying circuit and is used for rectifying alternating current generated by the micro-generator through voltage-multiplying and outputting direct current; The second control circuit is an under-voltage locking circuit, and when the voltage is lower than a set value, the following circuit is disconnected and the external discharge is stopped; the third control circuit is a voltage stabilizing circuit and is used for stabilizing the voltage at a corresponding preset voltage value; the fourth control circuit is a data acquisition and wireless transmission circuit.
8. The micro-generator of claim 7, wherein an energy storage capacitor for storing energy is electrically connected between the first control circuit and the second control circuit.

Description

Self-driven power generation element and micro-generator Technical Field The utility model relates to the technical field of micro-generators, in particular to a self-driven power generation element and a micro-generator. Background At numerous microsensors and signal transmission terminals of the internet of things, a large amount of micro energy sources are needed for power supply, and the traditional power supply modes such as batteries, solar energy, radio frequency, friction and the like have the problems of difficult replacement, troublesome maintenance, low power supply efficiency, short service life and the like. Weak mechanical energy is collected from the environment, so that the electronic system is powered, and the electronic equipment can be free from the constraint of battery replacement or frequent charging. However, the traditional micro energy collection system has the technical defects of low energy density, complex processing technology of the micro generator, incompact structural connection and low efficiency of collecting vibration energy of different frequencies. Therefore, how to solve the above-mentioned technical drawbacks is a major concern for those skilled in the art, and it is important to design a micro-generator with excellent output performance to realize self-driving of electronic devices. Disclosure of utility model In order to solve the technical defects, the utility model provides a self-driven power generation element and a micro-generator, which aim to increase the integration level of the generator, and the generators with different vibration frequencies can be flexibly combined according to different application scenes through array design, so that the diversity and flexibility of products are realized. The self-driven power generation element comprises an induction power generation assembly, a power generation assembly and a power generation assembly, wherein the induction power generation assembly comprises a coil and an iron core arranged in the coil; The magnetic component is arranged on the periphery of the induction power generation assembly in a surrounding mode, can vibrate perpendicular to the induction power generation assembly under the excitation of external vibration, generates alternating induction current through rapid alternating change of magnetic flux directions in the coil when the magnetic component moves, and is used for fixing a cantilever structure of the magnetic component, and the cantilever structure drives the magnetic component to vibrate perpendicular to the induction power generation assembly. Further, the iron core is perpendicular to the magnetic piece, and the coil surrounds the outer side of the iron core. Further, the magnetic part comprises at least two groups of magnetic blocks which are sequentially arranged in the vertical direction of the induction power generation assembly, each group of magnetic blocks comprises an N-pole magnetic block unit and an S-pole magnetic block unit, and the N-pole magnetic block units and the S-pole magnetic block units are alternately arranged in the vertical direction. Further, the magnetic part comprises four groups of magnetic blocks, the magnetic blocks encircle the induction power generation assembly, are respectively arranged on the upper side and the lower side of the vibrating diaphragm, and the N poles and the S poles of the two magnetic blocks located on the upper side and the lower side of the vibrating diaphragm in the same area are intersected. Further, the self-driven power generation element further comprises a base, the induction power generation assembly is arranged on the base, the cantilever structure is a cantilever vibrating diaphragm, and the cantilever vibrating diaphragm is covered on the base. Further, the outer edge of the cantilever vibrating diaphragm is fixedly connected with the base, and at least one groove communicated with the magnetic piece is formed in the vibrating diaphragm. Further, the shape of the groove may be an "L" shape, a "T" shape, an arc shape, or an irregular shape. To achieve the object of the present invention, there is also provided a micro-generator comprising at least one set of said self-driven power generating elements. Further, the micro-generator further comprises a first control circuit, a second control circuit, a third control circuit and a fourth control circuit which are electrically connected with the micro-generator in sequence. The first control circuit is a voltage-multiplying rectifying circuit and is used for rectifying alternating current generated by the micro-generator through voltage-multiplying and outputting direct current; The second control circuit is an under-voltage locking circuit, and when the voltage is lower than a set value, the following circuit is disconnected and the external discharge is stopped; the third control circuit is a voltage stabilizing circuit and is used for stabilizing the voltage at a corresponding p