Wide-speed-domain magnetic force coupling piezoelectric wind energy collector

Abstract

Disclosed is a wide-speed-domain magnetic force coupling piezoelectric wind energy collector. The wide-speed-domain magnetic force coupling piezoelectric wind energy collector comprises a wind power rotary mechanism, a power generation apparatus and a rotor arranged in the power generation apparatus and connected with the wind power rotary mechanism, wherein the wind power rotary mechanism is rotationally arranged in the center of the power generation apparatus; a plurality of power generation units directly aligned to the rotor are arranged in the power generation apparatus; each power generation unit comprises a magnetic coupling piezoelectric power generation mechanism and a power generation coil; and the power generation coils and the magnetic coupling piezoelectric power generation mechanisms are arranged at intervals to be connected with the control unit separately. Through rotation, wind power is converted into periodical magnetic force to act on the magnetic coupling piezoelectric power generation mechanisms, so that a higher electromechanical coupling coefficient is realized, and energy density and reliability are improved; by virtue of designed multiple magnetic force coupling configuration, counteractive reluctance torque is overcome, so that the apparatus can perform effective operation even if at relatively low wind power; when the wind power is relatively high, an electromagnetic inductive power generation coil is switched on; and meanwhile, the magnetic coupling piezoelectric power generation mechanisms and the power generation coils are adopted for power generation, so that more energy can be harvested.

Description

technical field [0001] The invention relates to a technology in the field of wind power generation, in particular to a wide speed domain magnetic coupling piezoelectric wind energy collector. Background technique [0002] Traditional wind power mostly uses rotating turbine devices, which have low energy density and large volume, and are not suitable for miniaturization. At present, many scholars use the piezoelectric effect to design miniaturized wind energy harvesters. At present, most piezoelectric wind energy harvesting designs use wind-induced vibrations to repeatedly bend a single-layer or double-layer piezoelectric sheet attached to a cantilever beam, thereby converting wind energy into electrical energy. Using the piezoelectric sheet through the bending mode (d31) not only has a low piezoelectric constant, but also the piezoelectric sheet is easily degraded or even damaged in repeated bending. Another key problem of wind energy harvesting devices is poor environment...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the defects of poor environmental adaptability, low energy density, low reliability, and difficulty in meeting the needs of piezoelectric constants in the prior art, the present invention proposes a wide-velocity domain magnetically coupled piezoelectric wind energy harvester, which can start to work under different wind speed ranges Harvesting wind energy

Images