CN213342049U - Piezoelectric electromagnetic vibration energy collector and rectifying circuit and energy conversion circuit thereof - Google Patents
Piezoelectric electromagnetic vibration energy collector and rectifying circuit and energy conversion circuit thereof Download PDFInfo
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- CN213342049U CN213342049U CN202021748376.8U CN202021748376U CN213342049U CN 213342049 U CN213342049 U CN 213342049U CN 202021748376 U CN202021748376 U CN 202021748376U CN 213342049 U CN213342049 U CN 213342049U
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Abstract
本实用新型公开了一种压电电磁振动能量收集器及其整流电路和能量转换电路，包括：电磁能量收集单元、底板和若干组压电能量收集单元，电磁能量收集单元和若干组压电能量收集单元均设于底板上，若干组压电能量收集单元分别连接电磁能量收集单元。电磁能量收集单元包括：线圈、可调磁铁、固定螺栓和线圈固定架。每组压电能量收集单元包括可调固定架、悬梁固定架和压电双晶悬臂梁。利用多种能量转换机制和多组能量收集单元，弥补了压电机制低电流和电磁机制低电压的不足，增加了能量转换电路的机电耦合系数。调整固支支架的位置能改变压电双晶悬臂梁的轴向力，压电双晶悬臂梁的两端以预加的轴向力会给能量转换电路带来非线性，增加系统的输出。
The utility model discloses a piezoelectric electromagnetic vibration energy collector and its rectification circuit and energy conversion circuit, comprising: an electromagnetic energy collection unit, a base plate and several groups of piezoelectric energy collection units, an electromagnetic energy collection unit and several groups of piezoelectric energy collection units The collection units are all arranged on the bottom plate, and several groups of piezoelectric energy collection units are respectively connected to the electromagnetic energy collection units. The electromagnetic energy harvesting unit includes: a coil, an adjustable magnet, a fixing bolt and a coil fixing frame. Each group of piezoelectric energy harvesting units includes an adjustable fixing frame, a cantilever beam fixing frame and a piezoelectric double crystal cantilever beam. The use of multiple energy conversion mechanisms and multiple groups of energy collection units makes up for the shortage of low current in piezoelectric mechanism and low voltage in electromagnetic mechanism, and increases the electromechanical coupling coefficient of the energy conversion circuit. Adjusting the position of the fixed support can change the axial force of the piezoelectric bimorph cantilever beam. The pre-applied axial force at both ends of the piezoelectric bimorph cantilever will bring nonlinearity to the energy conversion circuit and increase the output of the system.
Description
Technical Field
The utility model belongs to the technical field of miniature electronic equipment, concretely relates to piezoelectricity electromagnetic vibration energy collector and rectifier circuit and energy conversion circuit thereof.
Background
In recent years, with the development of miniature electronic devices, low power consumption chips and sensors have emerged that make possible passive power supply using ambient environmental energy. The vibration energy has the characteristics of universality, stability and higher energy density, and is very suitable for providing energy for the wireless sensor. The traditional power supply mode is mainly a chemical battery, and the power supply mode has the following outstanding problems: 1. compared with electronic equipment, the battery has a limited service life, and the battery needs to be replaced or charged manually in a periodic manner. For some devices in special environments (unmanned areas, closed environments), the cost of battery replacement is too high or the replacement is difficult. 2. The environmental pollution caused by the discarded batteries is serious, and the recycling of the used batteries is also a great challenge.
In order to solve the problem of service life of the battery, various forms of energy collectors are proposed at home and abroad to replace chemical batteries, and solar batteries and thermoelectric batteries are common, but have higher requirements on light and temperature in the environment and are difficult to adapt to various complex environments.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough in the prior art, provide a piezoelectricity electromagnetic vibration energy collector, can collect the vibration under the various environment, improve electromechanical conversion efficiency and piezoelectricity output voltage simultaneously, use composite beam to extend the work bandwidth, possess better intensity.
For solving the prior art problem, the utility model discloses a piezoelectric electromagnetic vibration energy collector, include: the electromagnetic energy collection device comprises an electromagnetic energy collection unit, a bottom plate and a plurality of groups of piezoelectric energy collection units, wherein the electromagnetic energy collection unit and the plurality of groups of piezoelectric energy collection units are arranged on the bottom plate, and the plurality of groups of piezoelectric energy collection units are respectively connected with the electromagnetic energy collection units.
Further, the air conditioner is provided with a fan,
the electromagnetic energy collection unit includes: the coil comprises a coil, an adjustable magnet, a fixing bolt and a coil fixing frame, wherein the fixing bolt is arranged on a bottom plate, a threaded hole is formed in the middle of the adjustable magnet, the adjustable magnet is in threaded connection with the fixing bolt, the coil passes through the coil fixing frame and is arranged on the bottom plate, and the adjustable magnet and the coil are concentrically arranged.
Further, the air conditioner is provided with a fan,
each group of piezoelectric energy collecting units comprises an adjustable fixing frame, a suspension beam fixing frame and a piezoelectric bimorph cantilever beam, wherein the adjustable fixing frame is arranged on the bottom plate, the suspension beam fixing frame is connected with the adjustable fixing frame, one end of the piezoelectric bimorph cantilever beam is connected with the suspension beam fixing frame, and the other end of the piezoelectric bimorph cantilever beam is connected with the coil.
Further, the air conditioner is provided with a fan,
the adjustable magnet comprises an upper magnet, an intermediate layer and a lower magnet, the upper magnet is connected with the lower magnet through magnetism, the intermediate layer is arranged between the upper magnet and the lower magnet, the upper magnet and the lower magnet are provided with through holes for the fixing bolts to pass through, the intermediate layer is provided with threaded holes, and the intermediate layer is in threaded connection with the fixing bolts.
Further, the air conditioner is provided with a fan,
the surface of the piezoelectric bimorph cantilever beam is provided with a piezoelectric patch, and the surface of the piezoelectric patch is provided with a bonding pad.
Further, the air conditioner is provided with a fan,
the bottom plate is provided with a plurality of fixing grooves, and the adjustable fixing frame is arranged on the bottom plate through the fixing grooves.
Further, the air conditioner is provided with a fan,
and scale marks are arranged on two sides of the fixing groove.
Further, the air conditioner is provided with a fan,
the number of the piezoelectric energy collecting units is four, and the four groups of piezoelectric energy collecting units are circumferentially distributed on the bottom plate.
Further, a rectifier circuit of piezoelectricity electromagnetic vibration energy collector, rectifier circuit include full-bridge rectifier bridge and above arbitrary piezoelectricity electromagnetic vibration energy collector, piezoelectricity electromagnetic vibration energy collector connects the input of full-bridge rectifier bridge, piezoelectricity electromagnetic vibration energy collector even with parallelly connected inductance L and switch S between the full-bridge rectifier bridge.
Further, the energy conversion circuit of the piezoelectric electromagnetic vibration energy collector comprises a rectifying circuit, a voltage stabilizing circuit and a battery charging circuit which are sequentially connected in series, wherein the rectifying circuit is the rectifying circuit.
The utility model discloses beneficial effect who has:
1. by utilizing various energy conversion mechanisms and multiple groups of energy collecting units, the defects of low current of a piezoelectric mechanism and low voltage of an electromagnetic mechanism are overcome, the electromechanical coupling coefficient of the energy conversion circuit is increased, and the super capacitor or the rechargeable battery can be charged by utilizing the effective energy conversion circuit.
2. The axial force of the piezoelectric bimorph cantilever beam can be changed by adjusting the position of the fixed support, and the nonlinearity is brought to the energy conversion circuit by the axial force pre-applied to the two ends of the piezoelectric bimorph cantilever beam, so that the output of the energy conversion circuit is increased.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the whole structure of the fixing groove of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a schematic view of a partial structure of the present invention;
fig. 5 is a rectification circuit diagram of the present invention.
Reference numerals
The piezoelectric double-crystal cantilever beam fixing device comprises a coil 1, an adjustable magnet 2, a fixing bolt 3, a bottom plate 4, an adjustable fixing frame 5, a cantilever beam fixing frame 6, a piezoelectric double-crystal cantilever beam 7, a coil fixing frame 8, an upper magnet 9, an intermediate layer 10, a lower magnet 11 and a fixing groove 12.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 5, the present invention provides a piezoelectric electromagnetic vibration energy harvester, comprising: the electromagnetic energy collection device comprises an electromagnetic energy collection unit, a bottom plate 4 and a plurality of groups of piezoelectric energy collection units, wherein the electromagnetic energy collection unit and the plurality of groups of piezoelectric energy collection units are arranged on the bottom plate 4, and the plurality of groups of piezoelectric energy collection units are respectively connected with the electromagnetic energy collection units. The piezoelectric energy collection unit and the electromagnetic energy collection unit can work independently, and part or all of the units can be connected in series or in parallel to work together. When the load requires a high voltage, a part of the piezoelectric energy collecting unit and the electromagnetic energy collecting unit may be connected in series to increase the voltage. When the load requires a high current, a part of the piezoelectric energy collecting unit and the electromagnetic energy collecting unit may be connected in parallel to increase the current.
Specifically, the electromagnetic energy collection unit includes: coil 1, adjustable magnet 2, fixing bolt 3 and coil mount 8, fixing bolt 3 locates on bottom plate 4, adjustable magnet 2 middle part is equipped with the screw hole, adjustable magnet 2 with 3 threaded connection of fixing bolt, coil 1 passes through coil mount 8 locates on bottom plate 4, adjustable magnet 2 with coil 1 sets up with one heart. The function of the adjustable magnet 2 is to provide a magnetic field, and the adjustable magnet and the coil 1 form an electromagnetic energy collecting unit. The coil 1 is a cylinder and has the following functions: the natural frequency of the target energy conversion circuit is reduced and matched, and the electromagnetic vibrator is used for generating electricity, so that the electromechanical coupling coefficient is improved in a limited space, and the output of the energy conversion circuit is increased.
Specifically, every group piezoelectric energy collecting unit includes adjustable mount 5, hanging beam mount 6 and piezoelectricity bimorph cantilever beam 7, adjustable mount 5 is located on the bottom plate 4, hanging beam mount 6 is connected adjustable mount 5, piezoelectricity bimorph cantilever beam 7 one end is connected hanging beam mount 6, and the other end is connected coil 1. And axial tension or pressure is applied to the piezoelectric bimorph cantilever beam 7 by adjusting the fixed position of the adjustable fixing frame 5, so that the resonant frequency of the vibration energy collector is effectively changed. Meanwhile, the increase of the axial force of the piezoelectric bimorph cantilever beam 7 brings nonlinearity to the energy conversion circuit, and the output of the energy conversion circuit is increased. When the piezoelectric energy collecting unit generates vibration under the excitation of external vibration, the transverse vibration generated by the piezoelectric bimorph cantilever beam 7 reciprocally extrudes or stretches the piezoelectric material. The piezoelectric bimorph cantilever beam 7 generates charges under the action of external force and accumulates on the surface, so that the conversion from vibration energy to electric energy is realized. The output voltage of the piezoelectric energy collection unit is positively correlated with the bending deformation of the piezoelectric bimorph cantilever beam 7. Similarly, the excitation drives the magnet vibrator to move, and according to the Faraday's law of electromagnetism, the magnetic flux of the coil loop changes, so that induced electromotive force is generated. The induced current is positively correlated with the number of turns of the coil and the residual magnetic field strength of the magnet. Meanwhile, the output power of the energy conversion circuit is related to the external load, and the output power is the maximum when the external load is matched with the corresponding internal resistance. When the energy harvester is operated at the resonant frequency, the beam amplitude is maximized and the energy harvester is most efficient.
As shown in fig. 4, the adjustable magnet 2 includes an upper magnet 9, an intermediate layer 10 and a lower magnet 11, the upper magnet 9 is magnetically connected with the lower magnet 11, the intermediate layer 10 is disposed between the upper magnet 9 and the lower magnet 11, the upper magnet 9 and the lower magnet 11 are provided with through holes for the fixing bolt 3 to pass through, the intermediate layer 10 is provided with a threaded hole, and the intermediate layer 10 is in threaded connection with the fixing bolt 3. Such a structure has good magnetic properties
The surface of the piezoelectric bimorph cantilever beam 7 is provided with a piezoelectric patch, the piezoelectric patch is pasted on the piezoelectric bimorph cantilever beam 7 through conductive silver adhesive, and the surface of the piezoelectric patch is provided with a bonding pad and is connected with an external energy storage load or a rectifying circuit through a lead.
As shown in fig. 2, a plurality of fixing grooves 12 are formed in the bottom plate 4, and the adjustable fixing frame 5 is disposed on the bottom plate 4 through the fixing grooves 12. The axial force of the piezoelectric bimorph cantilever beam 7 is adjusted by adjusting the position of the adjustable fixing frame 5 on the fixing groove 12, and the scale marks are arranged on the two sides of the fixing groove 12, so that the position of the adjustable fixing frame 5 can be accurately adjusted conveniently, and the axial force of the piezoelectric bimorph cantilever beam 7 can be accurately adjusted.
As shown in fig. 3, the number of the piezoelectric energy collecting units is four, and the four groups of piezoelectric energy collecting units are circumferentially distributed on the bottom plate 4, so that the layout is reasonable.
As shown in fig. 5, a rectifier circuit of piezoelectric electromagnetic vibration energy collector, rectifier circuit include the full-bridge rectifier bridge and the utility model discloses a piezoelectric electromagnetic vibration energy collector, piezoelectric electromagnetic vibration energy collector connects the input of full-bridge rectifier bridge, piezoelectric electromagnetic vibration energy collector even with parallelly connected inductance L and switch S between the full-bridge rectifier bridge.
Further, the energy conversion circuit of the piezoelectric electromagnetic vibration energy collector comprises a rectifying circuit, a voltage stabilizing circuit and a battery charging circuit which are sequentially connected in series, wherein the rectifying circuit is the rectifying circuit shown in fig. 5.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the equipment or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In addition, in the drawings of the present invention, the filling pattern is only for distinguishing the pattern layer, and is not limited to any other pattern.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337369A (en) * | 2021-12-13 | 2022-04-12 | 株洲国创轨道科技有限公司 | Self-powered vibration energy collecting system of electric locomotive bogie |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114337369A (en) * | 2021-12-13 | 2022-04-12 | 株洲国创轨道科技有限公司 | Self-powered vibration energy collecting system of electric locomotive bogie |
| CN114337369B (en) * | 2021-12-13 | 2024-04-09 | 株洲国创轨道科技有限公司 | Self-powered vibration energy collection system of electric locomotive bogie |
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