Magnetoelectric laminated material current sensing device based on magnetic convergence effect

Abstract

The invention provides a magnetoelectric laminated material current sensing device based on a magnetic convergence effect. The device comprises a protective shell, a fixed base, a magnetic convergencesubstructure arranged on the fixed base, a permanent magnet arranged at the bottom of the magnetic convergence substructure, a mass block and a magnetoelectric laminated material which are respectively arranged above the magnetic convergence substructure, and a current carrying conductor arranged on the lower surface of the magnetoelectric laminated material. By means of the design, the problemsthat the sensitivity and linearity of an existing sensing device are low, the sensing device is complex in structure and difficult to install, a direct-current bias magnetic field is a fixed value andis difficult to adjust, and the structural resonance frequency cannot be adjusted are solved. The device is simple in structure and high in reliability, the structural resonance frequency is adjustedto be close to the current frequency, the larger output sensitivity is obtained, the direct-current bias magnetic field can be adjusted and the optimal bias magnetic fields of different magnetoelectric materials can be met, and furthermore, the resonance frequency can be adjusted, and the larger sensitivity is achieved when the currents at different frequencies are measured.

Description

technical field [0001] The invention belongs to the field of current sensing, in particular to a current sensing device based on a magnetoelectric laminated material based on a magnetic convergence effect. Background technique [0002] Magnetoelectric materials with magnetoelectric effect can realize the mutual conversion of magnetic energy and electrical energy, and are widely used in the field of current sensing. The magnetoelectric effect is a phenomenon in which a material generates a polarized electric field under the action of an external magnetic field or induces magnetization in an external electric field. The magnetoelectric laminated material is composed of a ferromagnetic material with magnetostrictive properties and a piezoelectric material with piezoelectric effect. Through Magneto-mechanical-electric coupling realizes magnetoelectric conversion. Its appearance overcomes the shortcomings of single-phase magnetoelectric materials such as low magnetoelectric coeff...

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Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a magnetoelectric laminate current sensing device based on the magnetic convergence effect, which solves the problem of low sensitivity and linearity, complex structure and difficult installation of the existing sensing devices. , Set the magnetic field to a fixed value, it is difficult to adjust, and the problem that the vibration frequency cannot be adjusted

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