Composite micro wind turbine generator

Abstract

The invention discloses a composite micro wind turbine generator, which comprises a micro bracket, a micro beam, a piezoelectric structure, a metal coil, a permanent magnet and a base, wherein one end or two ends of the micro beam are fixed on the micro bracket; the micro bracket is fixed on the base; and the micro beam, the piezoelectric structure and the metal coil form the movable part of the composite micro wind turbine generator. The micro beam is provided with the piezoelectric structure and the metal coil, the permanent magnet is fixed on the base, the south pole or north pole of the permanent magnet is opposite to the plane of the metal coil, a gap is preserved between the permanent magnet and the plane of the coil, and the generator converts the energy of vibration of a micro structure into electric energy by using both a piezoelectric effect and the principle of electromagnetic interaction and has a higher mechanical-electric conversion efficiency than micro wind turbine generators using the piezoelectric effect or the principle of electromagnetic interaction alone. The composite micro wind turbine generator can be processed in batches by silicon micromachining technology at low cost and is particularly suitable for supplying power to wireless sensor network nodes and the like.

Description

technical field [0001] The invention belongs to the field of micro-electro-mechanical systems (MEMS), in particular to MEMS micro-energy (Power MEMS) technology for converting environmental wind energy into electric energy. Background technique [0002] Compared with traditional energy sources such as batteries, micro-energy sources that directly convert vibration energy, fluid kinetic energy, thermal energy, solar energy, etc. kind of power supply. Based on micro-electromechanical systems (MEMS) technology, MEMS micro-energy, which converts environmental physical energy into electrical energy, also has many advantages such as small size, maintenance-free, and easy integration, and has become one of the hotspots of micro-energy research in the world. [0003] The micro-wind generator based on the wind-induced vibration mechanism converts the environmental wind energy into micro-structure vibration energy by using the micro-structure vibration caused by wind load, and furthe...

AI Technical Summary

Problems solved by technology

The current micro-vibrating wind turbines only use one of electromagnetic induction, piezoelectric effect and electrostatic effect to convert microstructure vibration energy into electrical energy. Piezoelectric needs of network nodes

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