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Friction-piezoelectric-electromagnetic composite energy harvester for low-speed rotary motion

A rotary motion and composite technology, applied in the direction of friction generators, piezoelectric effect/electrostrictive or magnetostrictive motors, electric components, etc., can solve the problem of low output power, low energy collection efficiency, and single energy capture method and other issues, to achieve the effect of improving output power and energy conversion efficiency, simple and compact structure, and high reliability

Active Publication Date: 2019-12-10
CHANGCHUN UNIV OF TECH
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low energy collection efficiency, single energy harvesting method, and low output power existing in existing sensor energy supply devices, the present invention discloses a friction-piezoelectric-electromagnetic composite energy harvester for low-speed rotational motion

Method used

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  • Friction-piezoelectric-electromagnetic composite energy harvester for low-speed rotary motion
  • Friction-piezoelectric-electromagnetic composite energy harvester for low-speed rotary motion

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Embodiment Construction

[0025] combine Figure 1~Figure 9 Describe this implementation mode:

[0026] This embodiment provides a specific implementation of a low-speed rotational motion-oriented friction-piezoelectric-electromagnetic composite energy harvester. The friction-piezoelectric-electromagnetic composite energy harvester facing low-speed rotation is composed of a semicircular outer shell 1, an end cover 2, a piezoelectric power generation unit 3, a friction power generation component 4, an electromagnetic coil 5, a cylindrical magnet 6, bolts 7. Composed of nuts 8; the semicircular outer casing 1 is fixed by means of bolts 7 and nuts 8 through threaded connections, and the end cover 2 is fixed on the semicircular outer casing by means of bolts 7 and nuts 8 through threaded connections The two ends of the body 1, the piezoelectric power generation unit 3 is fixed on the square groove 2-1 by gluing, the friction power generation component 4 is supported by the spring 4-2 and the threaded hole...

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Abstract

The invention discloses a friction-piezoelectric-electromagnetic composite energy harvester for low-speed rotary motion, and aims to solve the problems of low energy collection efficiency, single energy harvesting mode, low output power and the like of the conventional energy harvester. The energy harvester is composed of a semicircular outer shell, an end cover, a friction power generation assembly, an electromagnetic coil, a cylindrical magnet and a piezoelectric power generation unit. The energy harvester rotates along with the rotating body, the cylindrical magnet moves up and down in a cylindrical barrel formed by the semicircular outer shell under the action of the gravity of the cylindrical magnet and interacts with the electromagnetic coil on the outer side so as to achieve electromagnetic power generation; and the upper base body is driven by a boss to move in a reciprocating mode so as to achieve piezoelectric power generation and contact-separation type friction power generation. According to the composite energy harvester designed by the invention, the effective combination of three power generation modes such as friction power generation, piezoelectric power generationand electromagnetic power generation is realized, and the output power and the energy collection efficiency of the power generation device are improved. The energy harvester disclosed by the invention has wide application prospects in the technical field of environment vibration energy utilization.

Description

technical field [0001] The invention relates to a friction-piezoelectric-electromagnetic composite energy harvester for low-speed rotational motion, which belongs to the technical field of environmental vibration energy utilization. Background technique [0002] With the advancement of science and technology, wireless sensing technology has developed rapidly, and a large number of sensors have been widely used in industrial production, environmental monitoring and other fields. However, the continuous and stable operation of current sensors is mainly powered by chemical batteries and external circuits. However, the chemical battery power supply method has disadvantages such as limited service life, regular replacement, and environmental pollution; external circuit power supply has disadvantages such as complex energy supply lines, high maintenance costs and difficulty. Therefore, it is necessary to find a new way of energy supply. [0003] Harvesting mechanical energy in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N1/04H02N2/18H02K7/18H02K35/02
CPCH02N1/04H02N2/18H02K7/1876H02K35/02
Inventor 卢晓晖徐毓鸿马腾周建文程廷海王健龙杨伟雄郭进
Owner CHANGCHUN UNIV OF TECH
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