CN214959233U - Broadband electromagnetic vibration energy harvester based on frequency raising device - Google Patents
Broadband electromagnetic vibration energy harvester based on frequency raising device Download PDFInfo
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- CN214959233U CN214959233U CN202121109361.1U CN202121109361U CN214959233U CN 214959233 U CN214959233 U CN 214959233U CN 202121109361 U CN202121109361 U CN 202121109361U CN 214959233 U CN214959233 U CN 214959233U
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Abstract
The utility model discloses a broadband electromagnetic vibration energy accumulator based on frequency-raising device. The electromagnetic vibration energy harvester is integrally and symmetrically arranged around the center, an inner cylinder and an outer cylinder are arranged between an upper end cover and a lower end cover, the inner cylinder and the outer cylinder are coaxially sleeved inside and outside, an annular gap is formed between the inner cylinder and the outer cylinder and used as an annular columnar channel, an upper fixed cylindrical magnet is fixed on the upper end cover, a lower fixed cylindrical magnet is fixed on the lower end cover, a moving cylindrical magnet is coaxially and movably arranged inside the inner cylinder, an upper fixed annular magnet and a lower fixed annular magnet are coaxially and fixedly arranged on the upper end surface of the lower end cover and the upper end surface of the lower end cover in the annular columnar channel respectively, and a moving annular magnet is coaxially and movably sleeved between the upper fixed annular magnet and the lower fixed annular magnet; an inner cylinder coil is fixedly arranged on the outer circumference side of the inner cylinder, and an outer cylinder coil is fixedly arranged on the outer circumference of the outer cylinder. The utility model discloses utilize the different two magnetic spring systems of resonant frequency to constitute a frequency raising device, improved the capture efficiency of low frequency vibration energy greatly.
Description
Technical Field
The utility model relates to an electromagnetic vibration energy harvester, concretely relates to broadband electromagnetic vibration energy harvester based on frequency raising device.
Background
Existing Tire Pressure Monitoring Systems (TPMS) are powered by button cells, which increase time costs and maintenance difficulties due to the limited life of the cells, which require replacement of the cells every few years. In addition, the use of batteries in large quantities is harmful to the environment and does not meet the requirements of green industry and sustainable development. Therefore, more and more researchers are trying to find a once-for-all solution (i.e. a method for enabling the TPMS to be self-powered) to solve the problem. Among the existing self-powered technologies, Vibration Energy Harvesters (VEHs) that capture energy from ambient vibrations are undoubtedly the most promising candidate for application. The rotation of the wheel can provide a large vibration amplitude and vibration acceleration, and therefore can be used as a potential power source of the TPMS. Most of existing vibration energy harvesters adopt a resonance type mechanical structure, taking an electromagnetic power generation device as an example, a magnet vibrates in a reciprocating manner under the driving of an environmental vibration source to cut a magnetic induction line, so that induced electromotive force is generated in a coil. Such resonant power generation devices achieve maximum output power when the external excitation frequency is equal to their own natural frequency. Moreover, the conventional resonant VEH can only work in a narrow frequency broadband range near the resonant frequency, which is obviously not suitable for the vehicle vibration occasion with a wide frequency range.
Most of the existing resonance type power generation devices are linear systems, although when the external excitation frequency is equal to the natural frequency of the resonance type power generation devices, large output power can be generated. However, the operating frequency range is very narrow, and the resonant power generation device can only work normally in a narrow frequency range (generally a few hertz) near the natural frequency. However, the excitation bandwidth in the TPMS is 1-40Hz, and obviously, the traditional VEH cannot be applied. In addition, when the frequency is low (<10Hz), according to the theory that the output power of the VEH and the excitation frequency form a cubic relation, the output power of the conventional resonant VEH is also low, and the power supply requirement of the TPMS cannot be well met.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an electromagnetic vibration energy harvester based on frequency-raising device just can solve above-mentioned difficult problem. The utility model discloses can understand as the series connection vibration system based on two magnetic springs, one is the low frequency vibration system, and another is the high frequency vibration system, and the low frequency vibration system is a scope with the natural frequency of high frequency vibration system, and the value of this scope is related to with the size of a dimension and the magnetic force of magnet are strong and weak. The low-frequency vibration system needs to respond to external vibration, so the frequency range of the low-frequency vibration system is consistent with the excitation frequency range, for example, the excitation frequency range of an automobile is 1-50Hz, the range of the low-frequency vibration system is 1-50Hz, the frequency range of the high-frequency vibration system is integrally larger than that of the low-frequency vibration system, and is about 60-90Hz, and the ranges can be realized by adjusting the size of the magnet and the strength of the magnetic force.
The low-frequency vibration system vibrates along with the vibration of the outside, and simultaneously transmits kinetic energy to the high-frequency vibration system through magnetic coupling, and the high-frequency vibration system converts the vibration energy into electric energy by utilizing an electromagnetic induction electromechanical conversion mechanism. The introduction of such frequency boosting devices brings about two fundamental advantages: firstly, the vibration frequency for generating electricity is greatly improved, which directly leads to the increase of the output power density; and secondly, the natural frequency of the vibration exciter can be close to the excitation frequency under the condition of keeping the tiny overall size. Secondly, the utility model discloses a magnetic spring-mass system comes to regard as low frequency and high frequency vibration system, and the characteristic that the magnetic spring becomes rigidity makes its resonant frequency can change along with excitation frequency's change, has great frequency response scope promptly, has satisfied the requirement of TPMS broadband. The utility model discloses well low frequency vibration system realizes through the magnetic force of non-contact to high frequency vibration system transmission energy, effectually has avoided because of damage and the energy loss that the contact brought, helps prolonging the utility model discloses a life.
The utility model discloses to the problem of the wheel vibration electricity generation difficulty of the big broadband of low frequency, provided the electromagnetic vibration energy harvester based on the device of raising frequency, the power generation facility's work response frequency band has been widened effectively to the device of raising frequency, and the series vibration system of two magnetic springs has greatly improved VEH's output through promoting frequency. In being used for tire pressure monitoring system and other environmental monitoring wireless sensor to realize the aspect of self-power, the utility model discloses very big application potential has.
The technical scheme of the utility model as follows:
the electromagnetic vibration energy harvester of the utility model is integrally and symmetrically arranged about the center, and comprises an upper end cover, an upper fixed annular magnet, an upper fixed cylindrical magnet, a movable cylindrical magnet, an inner cylinder coil, a lower fixed cylindrical magnet, a movable annular magnet, a lower fixed annular magnet, a lower end cover, an outer cylinder and an outer cylinder coil;
an inner cylinder and an outer cylinder are arranged between an upper end cover and a lower end cover, the inner cylinder and the outer cylinder are coaxially sleeved inside and outside, an annular gap is arranged between the inner cylinder and the outer cylinder and used as an annular columnar channel, an upper fixed cylindrical magnet is fixed on the end face of the upper end cover extending into the inner cylinder, a lower fixed cylindrical magnet is fixed on the end face of the lower end cover extending into the inner cylinder, a movable cylindrical magnet is coaxially and movably arranged in the inner cylinder between the upper fixed cylindrical magnet and the lower fixed cylindrical magnet and axially slides in the inner cylinder, an upper fixed annular magnet and a lower fixed annular magnet are coaxially and fixedly arranged on the upper end face of the lower end cover and the upper end face of the lower end cover in the annular columnar channel respectively, and a movable annular magnet is coaxially and movably sleeved in the annular columnar channel between the upper fixed annular magnet and the lower fixed annular magnet and axially slides in the annular columnar channel; the middle part of the outer circumference side of the inner cylinder is fixedly provided with an inner cylinder coil, and the middle part of the outer circumference surface of the outer cylinder is fixedly provided with an outer cylinder coil.
Be fixed with last fixed cylinder magnet on stretching into the upper end cover terminal surface in the inner tube, be fixed with down fixed cylinder magnet on stretching into the lower end cover terminal surface in the inner tube, specifically do:
the lower end face of the upper end cover is provided with a blind hole which is used as an end cover inner hole of the upper end cover, a support column is arranged in the end cover inner hole of the upper end cover, one end of the support column is coaxially fixed in the middle of the upper end cover, the other end of the support column is coaxially and fixedly connected with an upper fixed cylindrical magnet and extends into one end of the inner cylinder to be fixedly connected with the inner cylinder, and one end of the outer cylinder is hermetically embedded in the end cover inner hole of the upper end cover and then is fixedly connected with the upper end cover;
the upper end face of the lower end cover is also provided with a blind hole which is used as an end cover inner hole of the lower end cover, the other supporting column is arranged in the end cover inner hole of the lower end cover, one end of the other supporting column is coaxially fixed in the middle of the lower end cover, the other end of the other supporting column is coaxially and fixedly connected with the lower fixed cylindrical magnet and extends into the other end of the inner cylinder to be fixedly connected with the inner cylinder, and the other end of the outer cylinder is hermetically embedded in the end cover inner hole of the lower end cover to be fixedly connected with the lower end cover.
The middle part fixed mounting of inner tube outer circumference side has the inner tube coil, specifically does:
the middle part of the outer circumference side of the inner cylinder is provided with an inner cylinder raised edge, the middle part of the inner cylinder raised edge is provided with an annular groove and serves as an inner cylinder coil mounting groove, an inner cylinder coil is fixedly mounted in the inner cylinder coil mounting groove, and an axial strip-shaped groove and serves as a wire groove are further formed in the inner cylinder raised edge.
The middle part of outer cylinder outer circumference side fixed mounting urceolus coil specifically is:
the middle part of the outer circumference side of the outer barrel is provided with an outer barrel convex edge, the middle part of the outer barrel convex edge is provided with an annular groove and serves as an outer barrel coil mounting groove, and an outer barrel coil is fixedly mounted in the outer barrel coil mounting groove.
The magnetic poles of the upper fixed annular magnet, the upper fixed cylindrical magnet, the moving cylindrical magnet, the lower fixed cylindrical magnet, the moving annular magnet and the lower fixed annular magnet are all arranged along the axial direction, the magnetic poles of the adjacent ends between the upper fixed annular magnet and the moving annular magnet are the same, and the magnetic poles of the adjacent ends between the lower fixed annular magnet and the moving annular magnet are the same;
the magnetic poles of the adjacent ends between the upper fixed cylindrical magnet and the movable cylindrical magnet are the same, and the magnetic poles of the adjacent ends between the lower fixed cylindrical magnet and the movable cylindrical magnet are the same.
When the whole electromagnetic vibration energy harvester is not excited by environmental vibration, the central sections of the movable cylindrical magnet, the movable annular magnet, the inner cylinder coil and the outer cylinder coil are all in the same plane;
when the whole electromagnetic vibration energy harvester is excited by environmental vibration, the movable cylindrical magnet axially slides in the inner cylinder between the upper fixed cylindrical magnet and the lower fixed cylindrical magnet, and the movable annular magnet axially slides in the annular cylindrical channel.
The utility model has the advantages that:
the utility model discloses utilize the magnetic spring that becomes rigidity to widen the work response bandwidth of device.
The utility model discloses utilize the different two magnetic spring's of resonant frequency series connection vibration system to constitute a frequency raising device, improved the capture efficiency of low frequency vibration energy greatly.
The utility model discloses install in the wheel, can realize the conversion of wheel kinetic energy-electric energy high-efficiently, can be used for replacing tire pressure monitoring system's button cell, avoided the trouble that the battery was changed.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the installation of the present invention in a wheel.
Fig. 3 is an exploded view of the overall structure of the present invention.
Fig. 4 is an exploded view of the outer and inner cylinders of the present invention.
Fig. 5 is a schematic view of the installation of the end cover and the fixed magnet of the present invention.
Fig. 6 is the appearance and the cross-sectional view of the present invention.
Fig. 7 is a schematic diagram of the motion process excited by the environmental vibration of the present invention.
In the figure: 1-upper end cover, 101-inner hole of end cover, 102-support column, 2-upper fixed ring magnet, 3-upper fixed cylindrical magnet, 4-moving cylindrical magnet, 5-inner cylinder, 501-inner cylinder coil mounting groove, 502-wire groove, 6-inner cylinder coil, 7-lower fixed cylindrical magnet, 8-moving ring magnet, 9-lower fixed ring magnet, 10-lower end cover, 11-outer cylinder, 111-outer cylinder coil mounting groove, 12-outer cylinder coil.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments:
as shown in fig. 1, 3, 4 and 6, the whole electromagnetic vibration energy harvester is symmetrically arranged about the center, and comprises an upper end cover 1, an upper fixed annular magnet 2, an upper fixed cylindrical magnet 3, a moving cylindrical magnet 4, an inner cylinder 5, an inner cylinder coil 6, a lower fixed cylindrical magnet 7, a moving annular magnet 8, a lower fixed annular magnet 9, a lower end cover 10, an outer cylinder 11 and an outer cylinder coil 12;
an inner cylinder 5 and an outer cylinder 11 are arranged between an upper end cover 1 and a lower end cover 10, the inner cylinder 5 and the outer cylinder 11 are coaxially sleeved inside and outside, an annular gap is arranged between the inner cylinder 5 and the outer cylinder 11 and used as an annular columnar channel, the axial lengths of the inner cylinder 5 and the outer cylinder 11 are the same, an upper fixed cylindrical magnet 3 is fixed on the end surface of the upper end cover 1 extending into the inner cylinder 5, a lower fixed cylindrical magnet 7 is fixed on the end surface of the lower end cover 10 extending into the inner cylinder 5, a movable cylindrical magnet 4 is coaxially and movably arranged inside the inner cylinder 5 between the upper fixed cylindrical magnet 3 and the lower fixed cylindrical magnet 7, the movable cylindrical magnet 4 axially slides inside the inner cylinder 5, an upper fixed annular magnet 2 and a lower fixed annular magnet 9 are respectively coaxially and fixedly arranged on the upper end surface of the lower end cover 1 and the upper end surface of the lower end cover 10 in the annular columnar channel, the upper fixed annular magnet 2 and the lower fixed annular magnet 9 are the same as the channel cross-section shapes at two sides of the annular columnar channel, a movable annular magnet 8 is coaxially and movably sleeved in an annular cylindrical channel between the upper fixed annular magnet 2 and the lower fixed annular magnet 9, and the movable annular magnet 8 axially slides in the annular cylindrical channel between the upper fixed annular magnet 2 and the lower fixed annular magnet 9; an inner cylinder coil 6 is fixedly arranged in the middle of the outer circumference side of the inner cylinder 5, the inner diameter of the movable annular magnet 8 is larger than the outer diameter of the inner cylinder coil 6, an outer cylinder coil 12 is fixedly arranged in the middle of the outer circumference surface of the outer cylinder 11, the inner cylinder coil 6 and the outer cylinder coil 12 are both located in the middle of the electromagnetic vibration energy harvester, and the inner cylinder coil 6 and the outer cylinder coil 12 are the same in thickness.
As shown in fig. 2, the electromagnetic vibration energy harvester is installed on a wheel, and when the wheel rotates, the moving cylindrical magnet 4 and the moving annular magnet 8 in the micro vibration energy harvester vibrate up and down relative to the electromagnetic vibration energy harvester under the action of gravity and tangential inertia force given by the wheel.
As shown in fig. 5, an upper fixed cylindrical magnet 3 is fixed on the end face of the upper end cover 1 extending into the inner cylinder 5, and a lower fixed cylindrical magnet 7 is fixed on the end face of the lower end cover 10 extending into the inner cylinder 5, specifically:
the lower end face of the upper end cover 1 is provided with a blind hole which is used as an end cover inner hole 101 of the upper end cover 1, a support column 102 is arranged in the end cover inner hole 101 of the upper end cover 1, one end of the support column 102 is coaxially fixed in the middle of the upper end cover 1, the other end of the support column 102 is coaxially fixedly connected with an upper fixed cylindrical magnet 3 and extends into one end of the inner cylinder 5 to be fixedly connected with the inner cylinder 5, and one end of the outer cylinder 11 is hermetically embedded in the end cover inner hole 101 of the upper end cover 1 and then is tightly and fixedly connected with the upper end cover 1;
the upper end face of the lower end cover 10 is also provided with a blind hole which is used as an end cover inner hole 101 of the lower end cover 10, the other supporting column 102 is arranged in the end cover inner hole 101 of the lower end cover 10, one end of the other supporting column 102 is coaxially fixed in the middle of the lower end cover 10, the other end of the other supporting column 102 is coaxially and fixedly connected with the lower fixed cylindrical magnet 7 and extends into the other end of the inner cylinder 5 to be fixedly connected with the inner cylinder 5, and the other end of the outer cylinder 11 is hermetically embedded in the end cover inner hole 101 of the lower end cover 10 to be tightly and fixedly connected with the lower end cover 10.
As shown in fig. 7, the magnetic poles of the upper fixed ring magnet 2, the upper fixed cylindrical magnet 3, the moving cylindrical magnet 4, the lower fixed cylindrical magnet 7, the moving ring magnet 8 and the lower fixed ring magnet 9 are all arranged in the axial direction, the magnetic poles of the adjacent ends between the upper fixed ring magnet 2 and the moving ring magnet 8 are the same, and the magnetic poles of the adjacent ends between the lower fixed ring magnet 9 and the moving ring magnet 8 are the same;
the adjacent end between the upper fixed cylindrical magnet 3 and the movable cylindrical magnet 4 has the same magnetic pole, and the adjacent end between the lower fixed cylindrical magnet 7 and the movable cylindrical magnet 4 has the same magnetic pole.
The middle part of the outer circumference side of the inner cylinder 5 is fixedly provided with an inner cylinder coil 6, which specifically comprises:
an inner cylinder bulge edge is arranged in the middle of the outer circumference side of the inner cylinder 5, an annular groove is formed in the middle of the inner cylinder bulge edge and serves as an inner cylinder coil mounting groove 501, an inner cylinder coil 6 is fixedly mounted in the inner cylinder coil mounting groove 501, namely the outer diameter of the inner cylinder bulge edge is smaller than the inner diameter of the inner cylinder coil 6, an axial strip-shaped groove is further formed in the inner cylinder bulge edge and serves as a wire groove 502, and a wire for mounting the inner cylinder coil 6 is arranged in the wire groove 502.
The middle part of the outer circumference side of the outer cylinder 11 is fixedly provided with an outer cylinder coil 12, which specifically comprises the following components:
an outer cylinder convex edge is arranged in the middle of the outer circumference side of the outer cylinder 11, an annular groove is formed in the middle of the outer cylinder convex edge and serves as an outer cylinder coil mounting groove 111, and an outer cylinder coil 12 is fixedly mounted in the outer cylinder coil mounting groove 111.
When the whole electromagnetic vibration energy harvester is not excited by environmental vibration, namely the movable cylindrical magnet 4 and the movable annular magnet 8 are not driven by external force, the central sections of the movable cylindrical magnet 4, the movable annular magnet 8, the inner cylinder coil 6 and the outer cylinder coil 12 are all in the same plane;
when the whole electromagnetic vibration energy harvester is excited by environmental vibration, the movable cylindrical magnet 4 axially slides in the inner cylinder between the upper fixed cylindrical magnet 3 and the lower fixed cylindrical magnet 7, and the movable annular magnet 8 axially slides in the annular cylindrical channel.
The working principle of the utility model is as follows:
as shown in fig. 7 (a), when the whole electromagnetic vibration energy harvester is not excited by environmental vibration due to the magnetic repulsion, the movable ring magnet 8 and the movable cylindrical magnet 4 are suspended in the middle of the inner and outer cylinders. When the magnetic field is excited by environmental vibration, the movable annular magnet 8 and the movable cylindrical magnet 4 respectively vibrate up and down in the annular cylindrical channel and the inner cylinder 5, and at the moment, according to the Faraday's law of electromagnetic induction, induced electromotive force is generated in the inner cylinder coil 6 and the outer cylinder coil 12 which are wound on the inner cylinder 5 and the outer cylinder 11. When the excitation acceleration is small, the movable ring magnet 8 and the movable cylindrical magnet 4 are attracted together by magnetic force and vibrate up and down in a cooperative manner along with external vibration, and the working cycle is as follows: fig. 7 (a) → (c) → (a). Since the two moving magnets move cooperatively, the inner cylinder coil 6 and the outer cylinder coil 12 will generate synchronous electromotive forces.
When the excitation acceleration is large (exceeds the critical separation acceleration), the moving ring magnet 8 moves downward together with the moving cylindrical magnet 4 first, as shown in fig. 7 (a).
The excitation acceleration is an inherent attribute of a vibration source in the environment, and in the tire pressure monitoring system, the excitation acceleration given to the vibration energy harvester is larger when the rotating speed of the wheel is larger. Because the range of the wheel rotating speed is wide (0-2500rpm), the range of the excitation acceleration of the vibration harvester is also wide. Therefore, a vibration harvester having a wide-band characteristic, specifically a large frequency response range, can be adapted to such an environment. The utility model discloses in with excitation acceleration divide into two, be for explaining this kind of vibration energy harvester can both work better in this kind of excitation acceleration wide environment to there is the effect of an liter in addition when excitation acceleration is great.
The critical separation acceleration refers to a critical excitation acceleration when the moving ring magnet and the moving cylinder magnet are separated. The moving ring magnet is mainly acted by two forces in the moving process, one is an inertia force given by an external excitation source, and the other is a magnetic attraction force interacted with the moving cylindrical magnet. Once the dimensions of the moving ring magnet and the moving cylinder magnet are determined, the interaction force (magnetic attraction) between them can be determined (a constant value). And with the increase of the excitation acceleration, the inertia force borne by the movable ring-shaped magnet is gradually increased, when the inertia force is greater than the magnetic attraction force, the movable ring-shaped magnet can be separated from the movable cylindrical magnet (cannot be attracted), and the excitation acceleration at the moment is the critical separation acceleration.
The specific formula is as follows:
Finertia＝m·a
Wherein, FInertiaFor external excitationThe vibration source provides inertial force to the moving annular magnet, m is the mass of the moving annular magnet, and a is the excitation acceleration.
Just when separation occurred:
Finertia＝Fmax magnetic attraction
Thus, the critical separation acceleration may be determined by:
wherein, Fmax magnetic attractionIs the magnetic attraction between the moving ring magnet and the moving cylinder magnet.
Then the moving cylindrical magnet 4 is subjected to the repulsive force from the lower fixed cylindrical magnet 7 to gradually increase, the speed is reduced to 0, the moving annular magnet 8 still needs to continue to move downwards due to the inertia force, so that the moving cylindrical magnet and the moving annular magnet are separated, and the separated moving cylindrical magnet 4 generates a large acceleration instantly and vibrates at a high frequency in the inner cylinder, as shown in (b) of fig. 7; while the moving ring magnet 8 gradually approaches the lower end cap 10, the repulsive force from the lower fixed ring magnet 9 also gradually decelerates to 0, and then moves in the opposite direction, and when meeting the moving cylindrical magnet 4 again, the two are combined again and move upward cooperatively, as shown in fig. 7 (c); when the two approach the upper end cap 1, the separation occurs again, as shown in fig. 7 (d); finally, the moving ring magnet 8 is combined with the moving cylinder magnet 4 during the downward movement, and both move downward in cooperation, as shown in fig. 7 (e). The working cycle is as follows: fig. 7 (a) → (b) → (c) → (d) → (e) → (a).
Claims (6)
1. A broadband electromagnetic vibration energy harvester based on a frequency raising device is characterized in that the whole electromagnetic vibration energy harvester is symmetrically arranged about a center and comprises an upper end cover (1), an upper fixed annular magnet (2), an upper fixed cylindrical magnet (3), a movable cylindrical magnet (4), an inner cylinder (5), an inner cylinder coil (6), a lower fixed cylindrical magnet (7), a movable annular magnet (8), a lower fixed annular magnet (9), a lower end cover (10), an outer cylinder (11) and an outer cylinder coil (12);
an inner cylinder (5) and an outer cylinder (11) are arranged between an upper end cover (1) and a lower end cover (10), the inner cylinder (5) and the outer cylinder (11) are coaxially sleeved inside and outside, an annular gap is arranged between the inner cylinder (5) and the outer cylinder (11) to serve as an annular columnar channel, an upper fixed cylindrical magnet (3) is fixed on the end face of the upper end cover (1) extending into the inner cylinder (5), a lower fixed cylindrical magnet (7) is fixed on the end face of the lower end cover (10) extending into the inner cylinder (5), a movable cylindrical magnet (4) is coaxially and movably arranged inside the inner cylinder (5) between the upper fixed cylindrical magnet (3) and the lower fixed cylindrical magnet (7), the movable cylindrical magnet (4) axially slides inside the inner cylinder (5), an upper fixed annular magnet (2) and a lower fixed annular magnet (9) are respectively coaxially and fixedly arranged on the upper end face of the lower end face of the upper end cover (1) and the upper end face of the lower end cover (10) in the annular columnar channel, a movable annular magnet (8) is coaxially and movably sleeved in an annular cylindrical channel between the upper fixed annular magnet (2) and the lower fixed annular magnet (9), and the movable annular magnet (8) axially slides in the annular cylindrical channel; an inner cylinder coil (6) is fixedly arranged in the middle of the outer circumference side of the inner cylinder (5), and an outer cylinder coil (12) is fixedly arranged in the middle of the outer circumference surface of the outer cylinder (11).
2. The broadband electromagnetic vibration energy harvester based on the frequency raising device as claimed in claim 1, wherein the upper end cover (1) extending into the inner cylinder (5) is fixed with an upper fixed cylindrical magnet (3) on the end face, and the lower end cover (10) extending into the inner cylinder (5) is fixed with a lower fixed cylindrical magnet (7) on the end face, specifically:
the lower end face of the upper end cover (1) is provided with a blind hole which is used as an end cover inner hole (101) of the upper end cover (1), a support column (102) is arranged in the end cover inner hole (101) of the upper end cover (1), one end of the support column (102) is coaxially fixed in the middle of the upper end cover (1), the other end of the support column (102) is coaxially and fixedly connected with a fixed cylindrical magnet (3) and extends into one end of an inner cylinder (5) to be fixedly connected with the inner cylinder (5), and one end of an outer cylinder (11) is hermetically embedded in the end cover inner hole (101) of the upper end cover (1) to be fixedly connected with the upper end cover (1);
the upper end face of the lower end cover (10) is also provided with a blind hole, the blind hole is used as an end cover inner hole (101) of the lower end cover (10), another supporting column (102) is arranged in the end cover inner hole (101) of the lower end cover (10), one end of the other supporting column (102) is coaxially fixed in the middle of the lower end cover (10), the other end of the other supporting column (102) is coaxially and fixedly connected with a lower fixing cylindrical magnet (7) and extends into the other end of the inner cylinder (5) to be fixedly connected with the inner cylinder (5), and the other end of the outer cylinder (11) is hermetically embedded in the end cover inner hole (101) of the lower end cover (10) to be fixedly connected with the lower end cover (10).
3. The broadband electromagnetic vibration energy harvester based on the frequency booster as claimed in claim 1, wherein an inner cylinder coil (6) is fixedly installed in the middle of the outer circumference side of the inner cylinder (5), specifically:
the middle part of inner tube (5) outer circumference side is provided with the inner tube flange, and inner tube flange middle part is opened has the ring channel and is regarded as inner tube coil mounting groove (501), and fixed mounting has inner tube coil (6) in inner tube coil mounting groove (501), still opens axial bar groove in the inner tube flange and is regarded as wire casing (502).
4. The broadband electromagnetic vibration energy harvester based on the frequency booster as claimed in claim 1, wherein an outer cylinder coil (12) is fixedly installed in the middle of the outer circumference side of the outer cylinder (11), and specifically:
the middle part of the outer circumference side of the outer barrel (11) is provided with an outer barrel convex edge, the middle part of the outer barrel convex edge is provided with an annular groove and serves as an outer barrel coil mounting groove (111), and an outer barrel coil (12) is fixedly mounted in the outer barrel coil mounting groove (111).
5. The broadband electromagnetic vibration energy harvester based on the frequency raising device is characterized in that the magnetic poles of the upper fixed ring magnet (2), the upper fixed cylindrical magnet (3), the moving cylindrical magnet (4), the lower fixed cylindrical magnet (7), the moving ring magnet (8) and the lower fixed ring magnet (9) are arranged along the axial direction, the magnetic pole of one end adjacent to the upper fixed ring magnet (2) and the moving ring magnet (8) is the same, and the magnetic pole of one end adjacent to the lower fixed ring magnet (9) and the moving ring magnet (8) is the same;
the adjacent ends of the upper fixed cylindrical magnet (3) and the movable cylindrical magnet (4) have the same magnetic poles, and the adjacent ends of the lower fixed cylindrical magnet (7) and the movable cylindrical magnet (4) have the same magnetic poles.
6. The broadband electromagnetic vibration energy harvester based on the frequency boosting device as claimed in claim 1, wherein when the electromagnetic vibration energy harvester is not excited by environmental vibration as a whole, the central sections of the moving cylindrical magnet (4), the moving annular magnet (8), the inner cylinder coil (6) and the outer cylinder coil (12) are all in the same plane;
when the whole electromagnetic vibration energy harvester is excited by environmental vibration, the movable cylindrical magnet (4) slides in the inner cylinder between the upper fixed cylindrical magnet (3) and the lower fixed cylindrical magnet (7) along the axial direction, and the movable annular magnet (8) slides in the annular cylindrical channel along the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121109361.1U CN214959233U (en) | 2021-05-21 | 2021-05-21 | Broadband electromagnetic vibration energy harvester based on frequency raising device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121109361.1U CN214959233U (en) | 2021-05-21 | 2021-05-21 | Broadband electromagnetic vibration energy harvester based on frequency raising device |
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| CN214959233U true CN214959233U (en) | 2021-11-30 |
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