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Moving coil type micro-mechanical electromagnetic vibration energy acquisition device based on upconversion

An energy harvester and moving coil miniaturized technology, applied in the direction of electromechanical devices, electrical components, etc., can solve the problems of adjusting the internal damping force of the structure, limiting the induced electromotive force of the coil, changing the stiffness of the cantilever beam, etc., and achieving high frequency adaptability and high output Voltage and output power, the effect of simplifying process steps

Inactive Publication Date: 2009-01-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this design can achieve up-conversion, since the permanent magnet passes through the plane where the coil is located, the permanent magnet occupies most of the area. When the device area is constant, the size of the coil winding is limited, including the number of turns and the length of the winding. Therefore, the induced electromotive force that the coil can generate is also limited
At the same time, since the permanent magnet occupies most of the area, the size and shape of the cantilever are strictly limited. When designing the device structure, it is difficult to change the stiffness of the cantilever by adjusting the shape and size of the cantilever, and it is difficult to change the thickness of the damping hole. Adjusting the damping force inside the structure, and then changing the amplitude and natural frequency, can only achieve up-conversion at a limited number of frequency points, and it is difficult to meet the requirements of using up-conversion in any frequency band within a wide frequency range from a few Hz to hundreds of Hz. Requirements for efficient energy harvesting through frequency conversion

Method used

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  • Moving coil type micro-mechanical electromagnetic vibration energy acquisition device based on upconversion
  • Moving coil type micro-mechanical electromagnetic vibration energy acquisition device based on upconversion
  • Moving coil type micro-mechanical electromagnetic vibration energy acquisition device based on upconversion

Examples

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Effect test

Embodiment 1

[0034] This embodiment is mainly aimed at the case where the external vibration frequency is lower than 50 Hz. Such as figure 1 As shown, this embodiment includes: an upper vibration pickup platform 1 , a gasket 2 and a lower vibration pickup platform 3 . The gasket 2 is located between the upper vibration pickup platform 1 and the lower vibration pickup platform 3 .

[0035] Such as figure 1 , 2 As shown, the upper vibration pickup table 1 includes: a top cover 4 , a metal planar spring 5 and a permanent magnet 6 . There is a pit in the center of the top cover 4, and the metal planar spring 5 is fixed on the edge of the pit in the top cover 4, including a central metal platform 8 and two cantilever beams 7 around it. The permanent magnet 6 is located on the metal platform 8 directly above the vibration pickup table 3 at the lower layer.

[0036] The pits on the top cover 4 have a depth of 200 microns to 400 microns, and a side length of 3 mm to 5 mm. It can be made of m...

Embodiment 2

[0052] This embodiment is mainly aimed at the situation that the external vibration frequency is higher than 50 Hz and lower than 200 Hz. Such as image 3 As shown, this embodiment includes: an upper vibration pickup platform 1 , a gasket 2 and a lower vibration pickup platform 3 . The gasket 2 is located between the upper vibration pickup platform 1 and the lower vibration pickup platform 3 .

[0053] Such as image 3 , 4 As shown, the upper vibration pickup table 1 includes: a top cover 4 , a metal planar spring 5 and a permanent magnet 18 . There is a pit in the center of the top cover 4, and the metal plane spring 5 is fixed on the edge of the pit in the top cover 4, including a central metal platform 20 and four cantilever beams 19 around it. The permanent magnet 18 is located on the metal platform 20 , directly above the vibration pickup table 3 at the lower layer.

[0054] The pits on the top cover 4 have a depth of 200 microns to 400 microns, and a side length of ...

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Abstract

The invention relates to a moving coil micromechanical electromagnetic vibration energy collector based on upconversion belonging to the new energy technical field composed of an upper vibration pick-up platform, a shim and a lower vibration pick-up platform. The upper vibration pick-up platform comprises a head cover, an upper flat spring and a permanent magnet, the flat spring arranged on the pit edge of the head cover comprises an upper central platform with the permanent magnet on and upper cantilever beams around the central platform; the lower vibration pick-up platform comprises a base, a lower flat spring, an insulation, a micro-coil winding and a soft magnetic armature, the lower flat spring arranged on the pit edge of the base comprises a lower central platform and lower cantilever beams around the central platform, the insulation with micro-coil winding on covers the lower central platform, the soft magnetic armature is arranged in the central and / or inferior and / or peripheral of the micro-coil winding, the permanent magnet and micro-coil winding move along a straight line up and down relative to the head cover and base and / or inclination swing. The energy collector of the invention has advantages of high conversion efficiency and good frequency adaptability, is easy to realize batch production.

Description

technical field [0001] The invention relates to a collector in the field of new energy technology, in particular to a moving-coil micromechanical electromagnetic vibration energy collector based on frequency up-conversion. Background technique [0002] With the maturity of microelectronics technology, high technologies such as automotive sensing, embedded systems, RFID (radio frequency identification) and wireless sensor networks are developing rapidly. These technologies require power supply components to have the characteristics of small size, light weight, and long life. The main power supply methods at present are batteries and wired power supply. The battery life is short, the storage energy is limited, and compared with the above devices, the volume and mass are large. When the working life is more than a few years, the battery-based power supply method is difficult to meet the power supply requirements of sensor nodes. Wireless communication and various bio-implante...

Claims

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Application Information

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IPC IPC(8): H02K35/00
Inventor 戴旭涵赵小林丁桂甫
Owner SHANGHAI JIAO TONG UNIV
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