CN102035430A - Stress magnetic conductivity changing/piezoelectric effect composite stress microvibrating power generating device - Google Patents
Stress magnetic conductivity changing/piezoelectric effect composite stress microvibrating power generating device Download PDFInfo
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- CN102035430A CN102035430A CN200910182541XA CN200910182541A CN102035430A CN 102035430 A CN102035430 A CN 102035430A CN 200910182541X A CN200910182541X A CN 200910182541XA CN 200910182541 A CN200910182541 A CN 200910182541A CN 102035430 A CN102035430 A CN 102035430A
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Abstract
The invention relates to a stress magnetic conductivity changing/piezoelectric effect composite stress microvibrating power generating device. A ferroelectric material with piezoelectric effect is embedded into a heterogenic soft magnet which is wound with a detecting coil and provided with a sealed magnetic path and has optimized magnetic conductivity to form a ferroelectric-ferromagnetic composite material; the ferroelectric-ferromagnetic composite material is encapsulated in a shell in a certain way; and after the ferroelectric-ferromagnetic composite material is arranged in a vibrating stress environment, the magnet and piezoelectrics are subjected to stress vibration (fluctuation) in a specific direction, and vibrating frequency exceeds a lower limit value, for example, f is larger than or equal to 30Hz, induced voltage (current) can be measured from the detecting coil, thereby converting mechanical vibrating energy into electric energy. The attached drawing in the specification is a structural abbreviated drawing of the stress magnetic conductivity changing/piezoelectric effect composite stress microvibrating power generating device, wherein the heterogenic magnet 1, an induction coil 2, the piezoelectrics 3, an output end 4 and the shell 5 are shown.
Description
Technical field
The present invention utilizes stress to become the little power generating device that shakes of a kind of novel environment friendly of magnetic conductance and piezoelectric effect design preparation, the stress that produces by extraneous mechanical oscillation shake (ripple) move and be used in the purpose that reaches generating on ferromagnetic-ferroelectric composite material.Belong to the magneto-electronics technical field.
Background technology
Magnetic material is divided into soft magnetic material and hard magnetic material two big classes on its function.The remanent magnetism of soft magnetic material and coercive force are all very low, so be easy to degaussing, are applicable to the occasion that needs remagnetization.The magnetic permeability of magnet is subjected to the strong influence of material internal stress usually.Apply external force and can change internal stress, thus the magnetic order in the change magnet, and then the magnetic permeability of change magnet, form stress and become magnetic conductance.When stress continued jitters (vibration), magnetic permeability also continues to change, and then the magnetic flux in the magnet continues to change, and forms electromagnetic induction.Induced voltage or electric current can obtain the search coil from magnet.
When piezoelectric was subjected to external force effect generation deformation, the relative displacement of negative ions no longer overlapped the positive and negative charge center in the structure cell, caused crystal polarization preface to change, and the variation of end face piezoelectricity.
The induced potential and the piezoelectrics terminal voltage serial or parallel connection that obtain on the magnet search coil are formed the little power generating device that shakes of stress.
Stress becomes the little power generating device that shakes of magnetic conductance/piezoelectric effect combined stress magnetic material and piezoelectric is formed composite material by certain mode, like this ferromagnetic-when ferroelectric composite material places the vibration stress environment, because the fluctuation (vibration) of stress, at the obtainable voltage of output much larger than independent magnetic material or piezoelectric voltage in the generation of vibration stress environment.Such power generating device requires: the external carbuncle that (1) continues changes, and (2) stress change magnetic conductance effect is enough strong, and (3) piezoelectric effect is enough big, and (4) vibration frequency surpasses certain lower limit, as f 〉=30Hz.
Summary of the invention
The technical problem that solves:
Directly mechanical vibrational energy is changed into electric energy.
The technical scheme of taking for the technical solution problem:
In the abnormal shape of wedge pressure electric material, have closed magnetic path, and magnetic permeability is through coiling search coil on the magnet of optimizing, coil is connected with the wiring that the piezoelectrics both ends of the surface are welded out, form output, and it is fixing by the ad hoc fashion encapsulation, form stress and become magnetic conductance and the little power generating device that shakes of piezoelectric effect combined stress.Be placed in the stress vibration environment, vibration stress acted on the specific direction of this device, thereby obtain the continuous and reliable electric current.
Beneficial effect:
The present invention can use the energy that mechanical oscillation are scattered and disappeared again, and environment is not had any pollution, only needs just can generate electricity voluntarily in certain vibration environment, and it is simple in structure, with low cost, and is applied widely.The size of induced voltage (stream) is subjected to the influence of the number of turns, stress vibration frequency and the amplitude and the load of material character, search coil.To height is 15 millimeters of 8 millimeters, overall diameter, and thick 3 millimeters, relative permeability is 10000 ring-shaped magnetic core, and length is 9 millimeters, and wide is 8 millimeters, and thick is 3 millimeters piezoelectrics, if the stress vibration frequency is the about 400～500mV of 50Hz left and right sides Ke De open circuit voltage.
Description of drawings:
Accompanying drawing is the structure diagram that stress becomes magnetic conductance/little power generating device that shakes of piezoelectric effect combined stress, wherein: 1, special-shaped magnet 2, induction coil 3, piezoelectrics 4, output 5, shell.
Specific embodiments:
As shown in the figure, select suitable special-shaped magnet to make magnetic core, go up coiling search coil (2) at special-shaped magnet (1), choose piezoelectrics (3), after its both ends of the surface are welded out wiring, piezoelectrics are embedded special-shaped magnet (1) by specific orientation, and be fixed with resin, again coil is connected by certain connected mode with wiring, form output (4), the system that combines is fixed in the specific shell (5) by orientation shown in the figure, on shell, apply satisfy condition answer force vibration (fluctuation), in output (4), will obtain induced voltage (electric current).Realize little generating of shaking, vibrational energy is transformed into electric energy.
Claims (2)
1. the little power generating device that shakes of stress change magnetic conductance/piezoelectric effect combined stress is to utilize stress to become a kind of environmental protection power generating device of magnetic conductance and piezoelectric effect design preparation.This device makes the internal stress of composite material produce synchronous vibration (or fluctuation) by the vibration (or fluctuation) of ambient stress of living in, make magnetic material generation stress become magnetic conductance and piezoelectrics generation piezoelectric effect, both effects of intercoupling, thus vibrational energy is converted into electric energy.Its feature mainly contains following components and forms: (1) special-shaped magnet, (2) search coil, (3) piezoelectrics, (4) output, (5) shell.
2. described by claims 1 is to utilize stress to become the little power generating device that shakes of a kind of combined stress that magnetic conductance and piezoelectric effect design prepare.It is characterized in that: the special-shaped magnet composite material that will be embedded with piezoelectrics and have a closed magnetic circuit places under the stress, and make stress wave (shaking) moving, magnetic order in the magnet ring will change and cause the variation of magnetic conductance, to produce induced voltage in coil, piezoelectrics change the electric polarization preface in stress generation deformation simultaneously, the voltage on piezoelectrics surface also changes thereupon, the two-way interaction intercouples, thereby obtains bigger electric current (pressure) at output.For making stress effectively conduct certain privileged site, and guarantee the reliability of current delivery, device must be fixed in the specific shell by the certain way encapsulation in magnetic core and piezoelectrics.Such power generating device is owing to being that the energy that mechanical oscillation are lost uses again, so belong to the second use of the energy.Its work does not have any pollution without any need for the additional energy source of form to environment, is with a wide range of applications.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182541XA CN102035430A (en) | 2009-09-28 | 2009-09-28 | Stress magnetic conductivity changing/piezoelectric effect composite stress microvibrating power generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182541XA CN102035430A (en) | 2009-09-28 | 2009-09-28 | Stress magnetic conductivity changing/piezoelectric effect composite stress microvibrating power generating device |
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| Publication Number | Publication Date |
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| CN102035430A true CN102035430A (en) | 2011-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910182541XA Pending CN102035430A (en) | 2009-09-28 | 2009-09-28 | Stress magnetic conductivity changing/piezoelectric effect composite stress microvibrating power generating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714955A (en) * | 2013-12-30 | 2014-04-09 | 北京大学 | Adjustable annular inductor |
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2009
- 2009-09-28 CN CN200910182541XA patent/CN102035430A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103714955A (en) * | 2013-12-30 | 2014-04-09 | 北京大学 | Adjustable annular inductor |
| CN103714955B (en) * | 2013-12-30 | 2016-08-17 | 北京大学 | Adjustable annular inductor |
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Application publication date: 20110427 |