Wind-induced gyromagnetic excitation type piezoelectric generator

Abstract

The invention relates to a wind-induced gyromagnetic excitation type piezoelectric generator and belongs to the technical field of new energy. The left and right ends of a shell are respectively provided with a left end cover and a right end cover. A main shaft is mounted on the left and right end covers through a bearing. A left shaft sleeve, a middle shaft sleeve and a right shaft sleeve are sequentially sleeved on the main shaft from left to right. A blade is arranged on the right end portion of main shaft. Magnetic cam rings are arranged on the right side of the left shaft sleeve, the two sides of the middle shaft sleeve and the left side of the right shaft sleeve, respectively. The left shaft sleeve, the middle shaft sleeve, the right shaft sleeve and the magnetic cam rings arranged on the shaft sleeves together form a cam, a left cam slot and a right cam slot. Piezoelectric vibrators are arranged on bosses on the inner wall of the shell. The free ends of the piezoelectric vibrators are provided with magnetic blocks. The magnetic blocks are arranged in left and right cam slots. The reaction force between magnetic blocks and adjacent magnetic cam rings is a repulsive force. When the magnetic blocks are in contact with the vertexes of cam surfaces on the right sides of the left and right cam slots, the bending deformation of the piezoelectric vibrators does not occur. When the magnetic blocks are in contact with the vertexes of cam surfaces on the left sides of the left and right cam slots, the deformation amount of two lamination composite layers at the free ends of the piezoelectric vibrators is smaller than the allowable value thereof.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a wind-induced gyromagnetic excitation piezoelectric generator, which provides real-time energy supply for micro-power systems such as wireless sensor nodes. Background technique [0002] Wind energy widely exists in nature, and wind power generation has become one of the mainstream energy sources in the world today. In the past, people only paid attention to the research of large-scale wind power generation system. Its research on micro-wind generators that provide continuous energy supply has attracted extensive attention from scholars at home and abroad. The micro-wind generators that have been proposed so far are basically based on the electromagnetic principle and the piezoelectric principle. Because the piezoelectric generator will not generate electromagnetic interference during the power generation process, it is more suitable for the application requireme...

AI Technical Summary

Problems solved by technology

The common feature of the above-mentioned piezoelectric generators is that they all use the bidirectional bending deformation of the piezoelectric vibrator to generate electricity. The biggest disadvantage is that the bending deformation of the piezoelectric vibrator varies greatly at different wind speeds, and the piezoelectric sheet is prone to excessive tensile stress due to large deformation. Large and damaged, but the power generation effect is not good when the deformation is small

Images