NL2031164B1 - Electromagnetic energy harvesting device - Google Patents

Electromagnetic energy harvesting device Download PDF

Info

Publication number
NL2031164B1
NL2031164B1 NL2031164A NL2031164A NL2031164B1 NL 2031164 B1 NL2031164 B1 NL 2031164B1 NL 2031164 A NL2031164 A NL 2031164A NL 2031164 A NL2031164 A NL 2031164A NL 2031164 B1 NL2031164 B1 NL 2031164B1
Authority
NL
Netherlands
Prior art keywords
rotor
energy harvesting
harvesting device
electromagnetic energy
gear
Prior art date
Application number
NL2031164A
Other languages
Dutch (nl)
Inventor
Zhang Xiangyong
Guan Huiyuan
Su Bin
Liu Haipeng
Peng Tingrui
Liu Yan
Original Assignee
Beijing Institute Tech
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Institute Tech filed Critical Beijing Institute Tech
Priority to NL2031164A priority Critical patent/NL2031164B1/en
Application granted granted Critical
Publication of NL2031164B1 publication Critical patent/NL2031164B1/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1853—Rotary generators driven by intermittent forces

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Linear Motors (AREA)

Abstract

Disclosed is an electromagnetic energy harvesting device, relating to the technical field of power generation apparatuses, comprising a stator mechanism, a rotor mechanism and a driving mechanism, wherein the rotor mechanism comprises a Halbach array, and the driving mechanism drives the rotor mechanism to rotate relative to the stator mechanism. The present invention is an electromagnetic energy harvesting device based on a Halbach array, which can effectively collect the vibration energy in the environment as well as the movement of human body, can be greatly reduced in size compared with the traditional device, and is more conducive to the use on human body. The present invention has a long life, high efficiency, good stability, good reliability and good lower frequency characteristics, and has a wide range of applications in the fields of passive wireless electrical energy supply for wearable devices and micro IOT sensors and so on.

Description

ELECTROMAGNETIC ENERGY HARVESTING DEVICE
TECHNICAL FIELD
[01] The present invention relates to the field of power generation devices, and more particularly to an electromagnetic energy harvesting device.
BACKGROUND ART
[02] At present, most of the low-power devices rely on electrochemical cells to supply power, but the battery energy storage is limited, there are many potential hazards, and the cost of periodic maintenance is relatively high, disposal of waste batteries is easy to bring environmental pollution problems. For some special cases, electrochemical cells do not meet our needs.
[03] There are many types of renewable and sustainable energy available for traditional energy harvesting technologies, such as: wind energy, water energy, solar energy, etc. but these cannot be used in a variety of mobile or vibrating environments.
The emerging piezoelectric energy harvesting technology is to harvest the vibration energy in the environment into electrical energy with the piezoelectric effect of piezoelectric materials. However, the maximum energy collection efficiency can be obtained only under the condition of resonance and high ambient vibration frequency, which has certain limitations.. To address this problem, there is a need for an efficient energy harvesting device that can obtain energy anytime and anywhere under low environmental vibration conditions.
SUMMARY
[04] Itis an object of the present invention to provide an electromagnetic energy harvesting device that solves the above-mentioned problems of the prior art, without being restricted by the use environment, which improves the energy harvesting efficiency.
[05] In order to achieve the above object, the present invention provides the following scheme:
[06] The present invention provides an electromagnetic energy harvesting device comprising a stator mechanism, a rotor mechanism and a driving mechanism, wherein the rotor mechanism comprises a Halbach array, a center line of the stator mechanism coincides with a center line of the rotor mechanism, and the driving mechanism drives the rotor mechanism to rotate relative to the stator mechanism.
[07] Preferably, the electromagnetic energy harvesting device further comprises a transmission mechanism and a ratchet mechanism, the center line of the ratchet mechanism coincides with the center line of the rotor mechanism, and the driving mechanism drives the ratchet mechanism via the transmission mechanism to drive the rotor mechanism to rotate in one direction relative to the stator mechanism.
[08] Preferably, the transmission mechanism comprises a coaxial and fixed first transmission gear and a second transmission gear, wherein the first transmission gear meshes with the driving mechanism, and the second transmission gear meshes with the ratchet mechanism.
[09] Preferably, the ratchet mechanism comprises a first gear, a connecting plate and at least one rachet, the first gear is fixedly arranged with the connecting plate, one end of the rachet is hinged with the connecting plate, the first gear meshes with the transmission mechanism, and the transmission mechanism drives the first gear to rotate so that the rachet drives the rotor mechanism to realize unidirectional rotation.
[10] Preferably, the rotor mechanism comprises a rotor sheath and the Halbach array, wherein one side of the rotor sheath is a tooth slot, and the other side of the rotor sheath is the Halbach array which is arranged close to the stator mechanism, and the Halbach array comprises a plurality of magnets.
[11] The present invention achieves the following technical effects with respect to the prior art:
[12] The present invention is an electromagnetic energy harvesting device based on a Halbach array, which can effectively collect the energy in the lower frequency vibration environment as well as the energy movement of human body, can be greatly reduced in size compared with the traditional energy harvesting device, and is more conducive to the use on human body. The present invention has a long life, high efficiency, good stability, good reliability and good low frequency characteristics.
BRIEF DESCRIPTION OF THE DRAWINGS
[13] In order to more clearly illustrate the embodiments of the present invention or the prior art, reference will now be made to the accompanying drawings which form a part hereof, and in which it will be apparent to a person skilled in the art that the various embodiments of the present invention are shown, by way of illustration only, and that other drawings may be made without departing from the spirit and scope of the invention.
[14] FIG. 1 is a schematic view of an electromagnetic energy harvesting device according to the present invention (Embodiment 1);
[15] FIG. 2 is a schematic view of a stator mechanism and a rotor mechanism according to the present invention (Embodiment 1);
[16] FIG. 3 is a top view of a stator mechanism according to the present invention (Embodiment 1);
[17] FIG. 4 is a plan view of a first coil according to the present invention (Embodiment 1);
[18] FIG. Sis a schematic view of a magnetically permeable support according to the present invention (Embodiment 1};
[19] FIG. 6 is a schematic view of an electromagnetic energy harvesting device according to the present invention (Embodiment 2);
[20] FIG. 7 is a schematic view of a stator mechanism and a rotor mechanism according to the present invention (Embodiment 2);
[21] FIG. 8 is a bottom view of a stator mechanism and a rotor mechanism according to the present invention (Embodiment 2);
[22] FIG. 9 is a plan view of a stator mechanism according to the present invention (Embodiment 2);
[23] FIG. 10 is a schematic view of the driving mechanism and transmission mechanism of the present invention;
[24] FIG. 11 is a schematic view of the ratchet mechanism of the present invention;
[25] FIG. 12 is a top view of the rotor mechanism of the present invention;
[26] FIG. 13 is a bottom view of the rotor mechanism of the present invention;
[27] FIG. 14 is a schematic diagram of a Halbach array of the present invention;
[28] wherein: 100-electromagnetic energy harvesting device, 1-stator mechanism, 2- rotor mechanism, 3-driving mechanism, 4-transmission mechanism, 5-ratchet mechanism, G-first transmission gear, 7-second transmission gear, 8-first gear, 9- connecting plate, 10-rachet, 11-connecting rod, 12-second gear, 13-rotor sheath, 14- gullet, 15-Halbach array, 16-first coil, 17-magnetic conduction support, 18-coil support, 19-second coil, 20-rebound mechanism, 21-elastic element, 22-fixed plate, 23-magnet.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[29] It is an object of the present invention to provide an electromagnetic energy harvesting device that solves the above-mentioned problems of the prior art, without being restricted by the use environment, which improves the energy harvesting efficiency.
[30] The above objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings.
[31] Embodiment 1
[32] As shown in FIGS. 1-5, 10-14: the present embodiment provides an electromagnetic energy harvesting device 100 comprising a stator mechanism 1, a rotor mechanism 2 and a driving mechanism 3, wherein the rotor mechanism 2 comprises a
Halbach array 15, the center line of the stator mechanism 1 coincides with the center line of the rotor mechanism 2, and the driving mechanism 3 drives the rotor mechanism 2 to rotate relative to the stator mechanism 1.
[33] Specifically, in the present embodiment, the rotor mechanism 2 comprises a rotor sheath 13 and a Halbach array 15, wherein one side of the rotor sheath 13 is a tooth slot 14, and the tooth slot 14 is an inclined tooth slot 14; the other side of the rotor sheath 13 is a Halbach array 15, and the Halbach array 15 is arranged close to the stator mechanism 1; the Halbach array 15 comprises a plurality of magnets 23, and each magnet 23 is embedded in a groove on the other side of the rotor sheath 13; the Halbach array 15 forms a magnetic ring in a polygonal or circumferential arrangement; and in the present embodiment, the Halbach array 15 is in the shape of a circular ring. The Halbach array 15 in the present embodiment is composed of 12 magnets 23 and has a large inertia, and after rotating, even if no driving force is input any more, it can continue to rotate under the effect of inertia, continuously generating electric energy and collecting energy, thus greatly improving the energy collection rate.
[34] In this embodiment, the magnets 23 are pyramid-shaped or arc-shaped permanent magnets.
[35] In the present embodiment, the stator mechanism 1 comprises a first coil 16 and two magnetic conductive supports 17, wherein the magnetic conductive supports 17 are made of iron pieces, each magnetic conductive support 17 comprises three magnetic conductive struts, the magnetic conductive struts of the two magnetic conductive supports 17 are arranged alternately, the first coil 16 is arranged between the two magnetic conductive supports 17 to serve the function of gathering magnetic flux lines, the center line of the first coil 16, the center lines of the two magnetic conductive supports 17 and the center line of the rotor mechanism 2 all coincide, the first coil 16 is wound into a petal shape, and the petal-shaped first coil 16 comprises several petals; the number of petals is an integer multiple of the number of the Halbach arrays 15, in this embodiment the number of petals is six and the number of the Halbach arrays 15 is one.
A first coil 16 is provided to facilitate energy collection, and the energy harvesting efficiency can be improved and the energy harvesting power can be increased by increasing the number of turns of the first coil 16. The magnetic support 17 plays a very important role in this structure. It can gather the magnetic field lines of the Halbach array closer to the direction of the coil 16, so that the coil 16 can better cut the magnetic field lines, that is, the magnetic field lines passing through the coil are more dense in unit time, and the coil havests more energy in unit time, so as to improve the energy harvesting efficiency.
[36] In this embodiment, the electromagnetic energy harvesting device 100 further comprises a transmission mechanism 4 and a ratchet mechanism 5, wherein the center line of the ratchet mechanism 5 coincides with the center line of the rotor mechanism 2, and the driving mechanism 3 drives the ratchet mechanism 5 via the transmission mechanism 4 to drive the rotor mechanism 2 to rotate in one direction relative to the stator mechanism 1.
[37] In this embodiment, the transmission mechanism 4 comprises a coaxial and fixed first transmission gear 6 and a second transmission gear 7, wherein the first transmission gear 6 is in transmission connection with the driving mechanism 3, and the second transmission gear 7 is in transmission connection with the ratchet mechanism 5.
[38] In the present embodiment, the ratchet mechanism 5 is an intermittent motion mechanism, and the ratchet mechanism 5 comprises a first gear 8, a connecting plate 9 and two rachets 10, wherein the first gear 8 is fixedly arranged with the connecting plate 9, one end of the two rachets 10 is hinged with the connecting plate 9, and the first gear 8 is in transmission connection with the transmission mechanism 4, and the transmission mechanism 4 drives the first gear 8 to rotate so that the rachets 10 drive the rotor mechanism 2 to realize unidirectional rotation. According to the perspective of FIG. 1, the first gear 8 rotates clockwise, and the ratchet mechanism 5 does not drive the rotor mechanism 2 to rotate; and the first gear 8 rotates counterclockwise, and the ratchet mechanism 5 drives the rotor mechanism 2 to rotate, i.e., the ratchet mechanism 5 drives the rotor mechanism 2 to rotate in one direction with respect to the stator mechanism 1, preventing reverse rotation. The unidirectional rotation of the rotor mechanism 2 keeps the energy harvesting circuit in a positive working state, which further promotes energy collection.
[39] In this embodiment, the driving mechanism 3 comprises a connecting rod 11 and a second gear 12, wherein one end of the connecting rod 11 is fixedly connected to the second gear 12, and the second gear 12 is in transmission connection to the transmission mechanism 4.
[40] In this embodiment, the connecting rod 11 of the driving mechanism 3 drives the second gear 12 to rotate; the second gear 12 meshes with the first transmission gear 6 of the transmission mechanism 4, and then drives the second transmission gear 7 to rotate; the second transmission gear 7 drives the first gear 8 of the ratchet mechanism 5 to rotate; the first gear 8 and the connecting plate 9 move together; and the rachet 10 meshes with the tooth slot 14, and drives the rotor mechanism 2 to rotate. An indexing circle diameter of the first transmission gear 6 is smaller than that of the second gear 12, the indexing circle diameter of the second gear 12 is smaller than that of the second transmission gear 7, and the indexing circle diameter of the second transmission gear 7 is much larger than the indexing circle diameter of the first gear 8, so as to achieve a larger rotation speed ratio, so that the electromagnetic energy harvesting device 100 has a better frequency harvesting effect, a significant frequency increase effect, a higher energy harvesting efficiency, and can drive the rotor mechanism 2 with a large inertia with a smaller driving force.
[41] In the present embodiment, the electromagnetic energy harvesting device 100 further comprises a rebound mechanism 20, wherein the rebound mechanism 20 comprises an elastic element 21 which is a spring, one end of the elastic element 21 is connected to the driving mechanism 3, and the other end of the elastic element 21 1s connected to a fixed plate 22 provided on one side of the stator mechanism 1. The rebound mechanism 20 can reset the driving mechanism 3 and realize the reciprocating motion under a very small driving force. This reciprocating motion can enable the rotor mechanism 2 to rotate in one direction under the action of the ratchet mechanism 5. This power source form that harvests the reciprocating motion into one-way rotation can realize repeated power input.
[42] Example 2
[43] As shown in FIGS. 6-14: this embodiment differs from Embodiment 1 in that in this embodiment, the stator mechanism 1 comprises a coil support 18 and a plurality of second coils 19, wherein the plurality of second coils 19 are uniformly distributed on the coil support 18, the center line of the coil support 18 coincides with the center line of the rotor mechanism 2, the plurality of second coils 19 are located on the same circumference and are uniformly distributed along the circumference of the same circumference, and the center line of the same circumference where the plurality of second coils 19 are located coincides with the center line of the rotor mechanism 2. A plurality of second coils 19 are distributed on one side of the Halbach array 15, the magnetic field lines are more densely distributed, and the energy harvesting efficiency is higher. The reverse magnetic force generated by each second coil 19 under Lenz's law is relatively small, and the inertia of the Halbach array 15 is relatively large, so that the reverse magnetic force of each second coil 19 can be well overcome, and the influence of Lenz' s law on the whole device is greatly reduced.
[44] The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, this description should not be construed as limiting the invention.

Claims (5)

ConclusiesConclusions 1. Elektromagnetische-energieoogstinrichting met het kenmerk dat die een statormechanisme, een rotormechanisme en een aandrijfmechanisme omvat, waarbij het rotormechanisme een Halbach-array omvat, een middellijn van het statormechanisme samenvalt met een middellijn van het rotormechanisme en het aandrijfmechanisme het rotormechanisme aandrijft om te draaien ten opzichte van het statormechanisme.An electromagnetic energy harvesting device characterized by comprising a stator mechanism, a rotor mechanism and a driving mechanism, wherein the rotor mechanism comprises a Halbach array, a diameter of the stator mechanism coincides with a diameter of the rotor mechanism and the driving mechanism drives the rotor mechanism to rotate relative to the stator mechanism. 2. Elektromagnetische-energieoogstinrichting volgens conclusie 1, met het kenmerk dat: de elektromagnetische-energieoogstinrichting verder een overbrengingsmechanisme en een ratelmechanisme omvat, de middellijn van het ratelmechanisme samenvalt met de middellijn van het rotormechanisme, en het aandrijfmechanisme het ratelmechanisme aandrijft via het overbrengingsmechanisme om het rotormechanisme aan te drijven om te draaien in één richting ten opzichte van het statormechanisme.2. The electromagnetic energy harvesting device of claim 1, wherein: the electromagnetic energy harvesting device further comprises a transmission mechanism and a ratchet mechanism, the centerline of the ratchet mechanism coincides with the centerline of the rotor mechanism, and the drive mechanism drives the ratchet mechanism through the transmission mechanism to rotor mechanism to rotate in one direction relative to the stator mechanism. 3. Elektromagnetische-energieoogstinrichting volgens conclusie 2, met het kenmerk dat: het overbrengingsmechanisme een coaxiale en vaste eerste overbrengingstandwiel en een tweede overbrengingstandwiel omvat, waarbij het eerste overbrengingstandwiel ineengrijpt met het aandrijfmechanisme, en het tweede overbrengingstandwiel ineengrijpt met het ratelmechanisme.3. The electromagnetic energy harvesting device of claim 2, wherein: the transmission mechanism includes a coaxial and fixed first transmission gear and a second transmission gear, the first transmission gear engaging the drive mechanism, and the second transmission gear engaging the ratchet mechanism. 4. Elektromagnetische-energieoogstinrichting volgens conclusie 2, met het kenmerk dat: het ratelmechanisme een eerste tandwiel, een verbindingsplaat en ten minste één ratel omvat, het eerste tandwiel vast gerangschikt 1s met de verbindingsplaat, één eind van de ratel gescharnierd is met de verbindingsplaat, het eerste tandwiel ineengrijpt met het overbrengingsmechanisme, en het overbrengingsmechanisme het eerste tandwiel aandrijft om te draaien zodat de ratel het rotormechanisme aandrijft om eenrichtingsomdraaiing te bewerkstelligen.An electromagnetic energy harvesting device according to claim 2, characterized in that: the ratchet mechanism comprises a first gear, a connecting plate and at least one ratchet, the first gear fixedly arranged 1s with the connecting plate, one end of the ratchet is hinged with the connecting plate, the first gear meshes with the transmission mechanism, and the transmission mechanism drives the first gear to rotate so that the ratchet drives the rotor mechanism to produce one-way rotation. 5. Elektromagnetische-energieoogstinrichting volgens conclusie 1, met het kenmerk dat: het rotormechanisme een rotorschede en de Halbach-array omvat, waarbij één kant van de rotorschede een tandsleuf is, en de andere kant van de rotorschede de5. The electromagnetic energy harvesting device of claim 1, wherein: the rotor mechanism comprises a rotor sheath and the Halbach array, one side of the rotor sheath being a tooth slot, and the other side of the rotor sheath being the Halbach-array is die nabij het statormechanisme gerangschikt is, en het Halbach-array een veelheid van magneten omvat.Halbach array is arranged near the stator mechanism, and the Halbach array includes a plurality of magnets.
NL2031164A 2022-03-04 2022-03-04 Electromagnetic energy harvesting device NL2031164B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2031164A NL2031164B1 (en) 2022-03-04 2022-03-04 Electromagnetic energy harvesting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2031164A NL2031164B1 (en) 2022-03-04 2022-03-04 Electromagnetic energy harvesting device

Publications (1)

Publication Number Publication Date
NL2031164B1 true NL2031164B1 (en) 2023-09-08

Family

ID=88064679

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2031164A NL2031164B1 (en) 2022-03-04 2022-03-04 Electromagnetic energy harvesting device

Country Status (1)

Country Link
NL (1) NL2031164B1 (en)

Similar Documents

Publication Publication Date Title
CN102723894B (en) Rotary piezoelectric generation device
CN202503456U (en) Piezoelectricity-magnetoelectricity mixing energy harvesting device
CN110649763B (en) Electromagnetic type energy harvester
CN109149993B (en) Generator
CN108512390A (en) A kind of pendulum model electromagnetism-friction energy composite energy collector
CN103346696A (en) Array-type compound energy collector
CN105680720A (en) Multi-degree-of-freedom piezoelectric-electromagnetic composite multi-directional broadband kinetic energy collector
CN112240263B (en) Self-generating buoy system
CN111711380A (en) Electromagnetic-friction composite nano generator based on rolling friction
CN202663322U (en) Rotary piezoelectric power generating device
CN112821708A (en) Bistable electromagnetic-piezoelectric hybrid vibration energy collector and self-powered sensing system
CN113746375A (en) Up-conversion rolling ball actuated piezoelectric-electromagnetic wave vibration energy harvesting device
CN108347196B (en) Vibration energy collection system based on magnetoelectric composite material
NL2031164B1 (en) Electromagnetic energy harvesting device
CN115276364B (en) Laminated flexible telescopic electromagnetic vibration energy collector
CN103280910B (en) Magnetoelectric micro electric generator of axial magnetic field
CN113422450B (en) Electromagnetic energy conversion device
CN116317345A (en) Wearable human upper limb movement energy harvester
CN113300537B (en) Human body wearable energy collector
CN203416191U (en) Array type composite energy collection device
CN101769223A (en) Wave power generation method and device thereof
CN211606362U (en) Energy collection vibration power generation device
CN219322253U (en) Omnidirectional electromagnetic mechanical energy collecting device
CN219605459U (en) Energy transfer system
CN204652197U (en) Rolling vibrator linear vibration energy collecting device