WO2015110093A2 - 多模式振动发电机 - Google Patents

多模式振动发电机 Download PDF

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Publication number
WO2015110093A2
WO2015110093A2 PCT/CN2015/077888 CN2015077888W WO2015110093A2 WO 2015110093 A2 WO2015110093 A2 WO 2015110093A2 CN 2015077888 W CN2015077888 W CN 2015077888W WO 2015110093 A2 WO2015110093 A2 WO 2015110093A2
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bracket
permanent magnet
piezoelectric
layer
coil
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PCT/CN2015/077888
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English (en)
French (fr)
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WO2015110093A3 (zh
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姚明辉
李印波
张伟
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北京工业大学
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Priority to AU2015208446A priority Critical patent/AU2015208446B2/en
Publication of WO2015110093A2 publication Critical patent/WO2015110093A2/zh
Publication of WO2015110093A3 publication Critical patent/WO2015110093A3/zh

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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
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
    • H10N30/304—Beam type
    • H10N30/306—Cantilevers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K16/00—Machines with more than one rotor or stator

Definitions

  • the invention relates to a multi-mode vibration generator, which can effectively combine piezoelectric power generation with electromagnetic power generation, and belongs to the field of green energy utilization.
  • piezoelectric power generation technology is gaining more and more attention as a new energy technology.
  • the traditional battery power supply has shortcomings such as short life, frequent replacement, limited storage energy, and the process of replacing the battery under certain conditions is complicated and pollutes the environment.
  • the conversion of mechanical energy in the form of vibration in the natural environment into electrical energy can not only pollute the environment, but also effectively supply power for low-power appliances.
  • Electromagnetic power generation is the production of electric energy by cutting the magnetic induction line by wire. This is a very classic power generation method. Combining electromagnetic power generation with piezoelectric power generation can effectively increase the electromechanical conversion efficiency of the system. Therefore, it is necessary to use a combination of two power generation methods to increase the amount of power generation and broaden its effective working frequency domain.
  • the multi-mode piezoelectric power generation structure can fully utilize the vibration energy in the natural environment, and its application is very strong.
  • the patent for power generation combined with enhanced power generation capacity has not yet been applied.
  • the Chinese patent (Publication No. CN104377993A) discloses an automatic parameter-modulated piezoelectric power generation structure, which increases the distance between the two permanent magnets during the vibration process of the piezoelectric cantilever beam by adding a spring, which is extremely large. Improve the power generation effect.
  • CN101764531A discloses a multi-working modal piezoelectric generator in which piezoelectric elements operating in a tensile and compression mode and operating in an impact mode are integrated in different parts of the piezoelectric generator. When the generator vibrates up and down, the piezoelectric sheet generates electrical energy either by tapping or by stretching and compression.
  • US patent Publication No. WO2010151738A3 discloses a bistable piezoelectric cantilever power generating device, which effectively widens the resonant frequency band of the cantilever beam, but the degree of bandwidth expansion is not very large.
  • the present invention provides a multi-mode vibration generator that combines piezoelectric power generation with electromagnetic power generation, which complement each other and promote each other. Under the external excitation, the piezoelectric beam is deformed to generate electric energy. During the vibration of the piezoelectric beam, both permanent magnets generate motion, so that the coil cuts the magnetic induction line to generate electric energy.
  • the technical solution adopted by the present invention is a multi-mode vibration generator including a bistable piezoelectric cantilever beam and an auxiliary structure;
  • the bistable piezoelectric cantilever beam includes a lead 1, a piezoelectric layer 2, and a base layer 3 , the bracket I4, the coil I5, the permanent magnet I8;
  • the auxiliary structure comprises a coil II6, a spring 7, a permanent magnet II9, a bracket II10; one end of the bistable piezoelectric cantilever is fixed, and the piezoelectric layer 2 is adhered to one end of the base layer 3
  • the lead 1 is taken out from the upper surface of the piezoelectric layer 2 and the surface of the base layer 3 respectively;
  • the other end of the bistable piezoelectric cantilever is a free end, and the free end is pasted with a permanent magnet I8, and the permanent magnet I8 is placed opposite to the permanent magnet I8.
  • the magnet II9, the permanent magnet I8 and the permanent magnet II9 repel each other; the permanent magnet
  • the outer side of the permanent magnet I8 is sleeved with a bracket I4, the outer side of the bracket I4 is wrapped with a coil I5; the outer side of the permanent magnet II9 is sleeved with a bracket II10, the outer side of the bracket II10 is wrapped with a coil II6;
  • bracket I4 and the bracket II10 are fixed, and the other end is free.
  • the coil I5 is wound around the surface of the bracket I4, and is wound by a multi-layer winding method from the bracket I4.
  • One end is wound around the surface of the bracket I4, and reaches the other end of the bracket I4, and then wound toward the original end, so as to reciprocate;
  • the coil II10 is wound on the surface of the bracket II10, and is wound from one end of the bracket II10 by means of multi-layer winding.
  • the surface of the bracket II10 is wound, and after reaching the other end of the bracket II10, it is wound toward the original end, and so on.
  • bracket I4 There is a certain gap between the bracket I4 and the permanent magnet I8, and there is a certain gap between the bracket II10 and the permanent magnet II9.
  • the material of the piezoelectric layer 2 is PZT or polarized PVDF.
  • the material of the base layer 3 is one of copper, steel, aluminum, and aluminum alloy.
  • the invention complements the bistable piezoelectric power generation and the electromagnetic power generation, and can fully utilize the movement of the two permanent magnets to generate additional electric energy.
  • the invention can automatically adjust the degree of bistable motion and the degree of cutting the magnetic induction line from time to time during the working process. It can effectively promote electromechanical conversion efficiency and enhance power generation capacity.
  • Figure 1 is a schematic view showing the structure of the invention
  • a multi-mode vibration generator includes a bistable piezoelectric cantilever beam and an auxiliary structure; the bistable piezoelectric cantilever beam includes a lead 1, a piezoelectric layer 2, a base layer 3, a support I4, and a coil I5.
  • the permanent magnet I8; the auxiliary structure comprises a coil II6, a spring 7, a permanent magnet II9, a bracket II10; one end of the bistable piezoelectric cantilever is fixed, the piezoelectric layer 2 is pasted at one end of the base layer 3, and the lead 1 is bent from the piezoelectric The upper surface of the layer 2 and the surface of the base layer 3 are respectively taken out; the other end of the bistable piezoelectric cantilever beam is a free end, a permanent magnet I8 is attached to the free end, and a permanent magnet II9 is placed opposite the permanent magnet I8, and the permanent magnet I8 is placed.
  • the permanent magnet II9 is mutually repelled; the permanent magnet II9 is connected to one end of the spring 7 and supported by a horizontally placed spring 7, and the other end of the spring 7 is fixed.
  • the outer side of the permanent magnet I8 is sleeved with a bracket I4, the outer side of the bracket I4 is wrapped with a coil I5; the outer side of the permanent magnet II9 is sleeved with a bracket II10, the outer side of the bracket II10 is wrapped with a coil II6;
  • bracket I4 and the bracket II10 are fixed, and the other end is free.
  • the coil I5 is wound around the surface of the bracket I4, and is wound around the surface of the bracket I4 from one end of the bracket I4 by a multi-layer winding manner, and then wound toward the original end of the bracket I4, and then reciprocated;
  • II10 is wound on the surface of the bracket II10, and is wound around the surface of the bracket II10 from one end of the bracket II10 by a multi-layer winding method, and then wound toward the other end of the bracket II10, and then wound toward the original end, so as to reciprocate.
  • bracket I4 There is a certain gap between the bracket I4 and the permanent magnet I8, and there is a certain gap between the bracket II10 and the permanent magnet II9.
  • the material of the piezoelectric layer 2 is PZT or polarized PVDF.
  • the material of the base layer 3 is one of copper, steel, aluminum, and aluminum alloy.

Abstract

一种多模式振动发电机，包括双稳态压电悬臂梁、附属结构；所述双稳态压电悬臂梁一端固定，压电层粘贴在基层的根部，引线从压电层上表面以及基层表面分别引出。所述双稳态压电悬臂梁自由端粘贴一个永久磁铁I，与永久磁铁I相对放置的是永久磁铁II，永久磁铁I与永久磁铁II相互排斥，永久磁铁II通过水平放置的弹簧支撑，弹簧另一端固定。在永久磁铁I和永久磁铁II外侧分别套上支架和线圈，支架为固定放置，线圈缠绕在支架上。本发明有效的将压电发电与电磁发电相结合，大大提高了结构整体的机电转换效率，极大的增强了系统发电能力。

Description

多模式振动发电机 技术领域
本发明涉及一种多模式振动发电机，可有效的将压电发电与电磁发电相结合，属于绿色能源利用领域。
背景技术
随着科技的进步以及对于新能源的不断探索，压电发电技术作为一项新能源技术，正日益获得人们的关注。传统的电池供电方式存在着寿命短、需要经常更换、储存能量有限等缺点，而且在某些条件下更换电池过程复杂，也会污染环境。将自然环境中振动形式的机械能转化为电能，既可以避免污染环境，又可以有效的为低功耗用电器供电。电磁发电是通过导线切割磁感线产生电能，这是一种非常经典的发电方式，将电磁发电与压电发电结合可有效增加系统的机电转换效率。因此，利用两种发电方式的结合是很有必要的，可以增大其发电量、拓宽其有效工作频域。
多模式压电发电结构能够充分的将自然环境中的振动能量加以利用，其应用性非常强，国内外关于压电发电的专利相对较少，关于双稳态压电发电与线圈切割磁感线发电相结合增强发电能力的专利暂时还无人申请。中国专利(公开号CN104377993A)公开了一种自动调参压电发电结构，该发明通过增加弹簧，使得压电悬臂梁在振动过程中，两个永久磁铁之间的距离能够自由调节，极大的的提高了发电效果。中国专利(公开号CN101764531A)公开了一种多工作模态压电发电机，将工作在拉伸与压缩模态以及工作在冲击模态的压电元件集成在压电发电机的不同部位。当发电机上下振动时，压电片或因敲击或因拉伸和压缩而产生电能。美国专利 (公开号WO2010151738A3)公开了一种双稳态压电悬臂梁发电装置，有效拓宽了悬臂梁的共振频带，但带宽拓展的程度并不是很大。
发明内容
为了有效的增加振动形式的机械能与电能之间的转换效率，本发明提供了一种多模式振动发电机，将压电发电与电磁发电相结合，二者相互补充，相互促进。在外激励作用下，压电梁发生形变产生电能。在压电梁振动的过程中，两块永久磁铁均产生运动，使得线圈切割磁感线产生电能。
为实现上述目的，本发明采用的技术方案为一种多模式振动发电机，包括双稳态压电悬臂梁、附属结构；双稳态压电悬臂梁包括引线1、压电层2、基层3、支架I4、线圈I5、永久磁铁I8；附属结构包括线圈II6、弹簧7、永久磁铁II9、支架II10；所述双稳态压电悬臂梁的一端固定，压电层2粘贴在基层3的一端，引线1从压电层2上表面以及基层3表面分别引出；所述双稳态压电悬臂梁的另一端为自由端，自由端粘贴有永久磁铁I8，与永久磁铁I8相对放置的是永久磁铁II9，永久磁铁I8与永久磁铁II9相互排斥；永久磁铁II9与弹簧7的一端连接且通过水平放置的弹簧7支撑，弹簧7另一端固定。
所述永久磁铁I8与永久磁铁II9之间存在一定间隙，能够使得双稳态压电悬臂梁在小激励振动下保持双稳态运动。
所述永久磁铁I8的外侧套有支架I4，支架I4的外侧缠有线圈I5；所述永久磁铁II9的外侧套有支架II10，支架II10的外侧缠有线圈II6；
所述支架I4、支架II10的一端固定，另一端自由。
所述线圈I5缠绕在支架I4的表面，采用多层缠绕的方式，从支架I4 的一端绕支架I4表面缠绕，到达支架I4的另一端后再朝着原来的一端缠绕，如此往复；所述线圈II10缠绕在支架II10的表面，采用多层缠绕的方式，从支架II10的一端绕支架II10表面缠绕，到达支架II10的另一端后再朝着原来的一端缠绕，如此往复。
所述支架I4与永久磁铁I8之间存在一定间隙，支架II10与永久磁铁II9之间存在一定间隙。
所述压电层2的材料为PZT或极化后的PVDF。
所述基层3的材料为铜、钢、铝、铝合金其中的一种。
与现有技术相比，本发明的有益效果是：
本发明将双稳态压电发电与电磁发电相互补充，能够充分利用两块永久磁铁的运动产生额外电能，本发明在工作过程中可以时时自动调节双稳态运动程度以及切割磁感线程度，能够有效促进机电转换效率，增强发电能力。
附图说明
图1是发明的结构示意图；
图中：
1-引线        2-压电层         3-基层
4-支架I       5-线圈I            6-线圈II
7-弹簧        8-永久磁铁I        9-永久磁铁II
10-支架II
具体实施方式
下面结合具体实施方式对本发明作进一步详细地描述。
如图1所示，一种多模式振动发电机，包括双稳态压电悬臂梁、附属结构；双稳态压电悬臂梁包括引线1、压电层2、基层3、支架I4、线圈I5、永久磁铁I8；附属结构包括线圈II6、弹簧7、永久磁铁II9、支架II10；所述双稳态压电悬臂梁的一端固定，压电层2粘贴在基层3的一端，引线1从压电层2上表面以及基层3表面分别引出；所述双稳态压电悬臂梁的另一端为自由端，自由端粘贴有永久磁铁I8，与永久磁铁I8相对放置的是永久磁铁II9，永久磁铁I8与永久磁铁II9相互排斥；永久磁铁II9与弹簧7的一端连接且通过水平放置的弹簧7支撑，弹簧7另一端固定。
所述永久磁铁I8与永久磁铁II9之间存在一定间隙，能够使得双稳态压电悬臂梁在小激励振动下保持双稳态运动。
所述永久磁铁I8的外侧套有支架I4，支架I4的外侧缠有线圈I5；所述永久磁铁II9的外侧套有支架II10，支架II10的外侧缠有线圈II6；
所述支架I4、支架II10的一端固定，另一端自由。
所述线圈I5缠绕在支架I4的表面，采用多层缠绕的方式，从支架I4的一端绕支架I4表面缠绕，到达支架I4的另一端后再朝着原来的一端缠绕，如此往复；所述线圈II10缠绕在支架II10的表面，采用多层缠绕的方式，从支架II10的一端绕支架II10表面缠绕，到达支架II10的另一端后再朝着原来的一端缠绕，如此往复。
所述支架I4与永久磁铁I8之间存在一定间隙，支架II10与永久磁铁II9之间存在一定间隙。
所述压电层2的材料为PZT或极化后的PVDF。
所述基层3的材料为铜、钢、铝、铝合金其中的一种。
尽管上面结合图对本发明进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，在不脱离本发明宗旨的情况下，还可以作出很多变形，这些均属于本发明的保护范畴。

Claims (5)

  1. 一种多模式振动发电机，其特征在于：该装置包括双稳态压电悬臂梁、附属结构；双稳态压电悬臂梁包括引线(1)、压电层(2)、基层(3)、支架I(4)、线圈I(5)、永久磁铁I(8)；附属结构包括线圈II(6)、弹簧(7)、永久磁铁II(9)、支架II(10)；所述双稳态压电悬臂梁的一端固定，压电层(2)粘贴在基层(3)的一端，引线(1)从压电层(2)上表面以及基层(3)表面分别引出；所述双稳态压电悬臂梁的另一端为自由端，自由端粘贴有永久磁铁I(8)，与永久磁铁I(8)相对放置的是永久磁铁II(9)，永久磁铁I(8)与永久磁铁II(9)相互排斥；永久磁铁II(9)与弹簧(7)的一端连接且通过水平放置的弹簧(7)支撑，弹簧(7)另一端固定；
    所述永久磁铁I(8)与永久磁铁II(9)之间存在一定间隙，能够使得双稳态压电悬臂梁在小激励振动下保持双稳态运动；
    所述永久磁铁I(8)的外侧套有支架I(4)，支架I(4)的外侧缠有线圈I(5)；所述永久磁铁II(9)的外侧套有支架II(10)，支架II(10)的外侧缠有线圈II(6)；
    所述支架I(4)、支架II(10)的一端固定，另一端自由。
  2. 根据权利要求1所述的一种多模式振动发电机，其特征在于：所述线圈I(5)缠绕在支架I(4)的表面，采用多层缠绕的方式，从支架I(4)的一端绕支架I(4)表面缠绕，到达支架I(4)的另一端后再朝着原来的一端缠绕，如此往复；所述线圈II(10)缠绕在支架II(10)的表面，采用多层缠绕的方式，从支架II(10)的一端绕支架II(10)表面缠绕，到达支架II(10)的另一端后再朝着原来的一端缠绕，如此往复。
  3. 根据权利要求1所述的一种多模式振动发电机，其特征在于：所述支架I(4)与永久磁铁I(8)之间存在一定间隙，支架II(10)与永久磁铁II(9)之间存在一定间隙。
  4. 根据权利要求1所述的一种多模式振动发电机，其特征在于：所述压电层(2)的材料为PZT或极化后的PVDF。
  5. 根据权利要求1所述的一种多模式振动发电机，其特征在于：所述基层(3)的材料为铜、钢、铝、铝合金其中的一种。
PCT/CN2015/077888 2015-04-22 2015-04-30 多模式振动发电机 WO2015110093A2 (zh)

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AU2015208446A AU2015208446B2 (en) 2015-04-22 2015-04-30 Multi-mode vibration power generator

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CN201510191784.5 2015-04-22
CN201510191784.5A CN104821743A (zh) 2015-04-22 2015-04-22 一种多模式振动发电装置

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