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Magnetoelectric transducer based on double-tuning-fork variable amplitude resonance structure

A technology of magnetoelectric transducer and resonant structure, which is applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, generators/motors, etc. problem, to achieve the effect of improving magnetoelectric conversion efficiency, high-efficiency magnetoelectric conversion efficiency, and enhancing vibration amplitude

Inactive Publication Date: 2009-12-02
CHONGQING UNIV
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Problems solved by technology

In addition, the contradiction between high quality factor and wide frequency band limits the application fields of magnetoelectric transducers

Method used

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  • Magnetoelectric transducer based on double-tuning-fork variable amplitude resonance structure

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Embodiment Construction

[0009] The inventor discovered the mechanism of energy aggregation and accumulation in the process of magnetic, mechanical and electrical energy conversion by studying the influence of piezoelectric materials, giant magnetostrictive materials and energy-gathering structural properties on the magnetoelectric conversion efficiency, and further studied the present invention. Invented magnetoelectric transducer based on double tuning fork variable-amplitude resonant structure, the transducer structure is composed of a fixed rod 1 and two energy concentrators with mutual coupling of vibration energy; the plane shape of a single energy concentrator is a centrally symmetrical figure; The center of gravity of the energy concentrator is fixed on the fixed rod 1, and the two vibrating arms 2-1 of the energy concentrator (that is, the protruding parts in the longitudinal direction of the substrate 2-2) are arranged on both sides of the fixed rod 1; The two vibration arms 2-1 on the same s...

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Abstract

The invention discloses a magnetoelectric transducer based on a double-tuning-fork variable amplitude resonance structure, which consists of a fixing rod and two energy accumulators with mutually coupled vibrational energy, wherein the planar shape of one energy accumulator is a centrosymmetric shape; the gravity center positions of the energy accumulators are fixed on the fixing rod, and two shaking arms of each energy accumulator are arranged on two sides of the fixing rod respectively; and the two shaking arms on the same side of the two energy accumulators form an arm of a tuning fork, and four shaking arms of the two energy accumulators along the two sides of the fixing rod form a double-tuning-fork resonance structure. The magnetoelectric transducer has the technical effects that under the action of turning fork resonance, because of the resonance of the vibrational energy, the quality factor is greatly improved, the vibration amplitude, the stress and the strain are strengthened, and the more efficient magnetoelectric conversion efficiency is achieved. Simultaneously, the magnetoelectric transducer adopts the structure with the energy accumulators to accumulate the vibrational energy so as to further improve the magnetoelectric conversion efficiency.

Description

technical field [0001] The invention relates to a technology capable of converting mechanical vibration energy into electric energy, in particular to a magnetoelectric transducer based on a double-tuning fork amplitude-changing resonance structure. Background technique [0002] Since the 1970s, researchers have been conducting unremitting research on magnetoelectric conversion technology; at present, research at home and abroad is mainly focused on giant magnetostriction and composite structures of different piezoelectric materials, as well as different materials, different The magnetoelectric conversion characteristics under the conditions of stacking number, working mode, coupling mode, composite volume ratio, frequency, etc., hope to improve the magnetoelectric conversion efficiency through the material's own characteristics. Due to the limitation of the characteristics of the existing materials, the quality factor of the composite material structure is low, and the loss ...

Claims

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Application Information

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IPC IPC(8): H02N2/18
Inventor 李平文玉梅
Owner CHONGQING UNIV
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