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Adjustable annular inductor

A ring-shaped inductance and ring-shaped technology, applied in the direction of variable inductors, inductors, transformer/inductor cores, etc., can solve the problem of small adjustable amount of magnetoelectric adjustable inductance, and achieve the increase of normal stress and increase The effect of large adjustable range and increased frontal contact area

Active Publication Date: 2014-04-09
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an adjustable loop inductor to overcome the problem of small adjustable amount of magnetoelectric adjustable inductor in the prior art

Method used

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  • Adjustable annular inductor

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Embodiment Construction

[0028] figure 1 A structural schematic diagram of an adjustable toroidal inductance provided for an embodiment of the present invention, as shown in figure 1 As shown, the controllable toroidal inductance of this embodiment includes: a toroidal magnetoelectric composite element 1 and a coil 2 wound on the toroidal magnetoelectric composite element 1 . Wherein, the annular magnetoelectric composite element 1 includes an annular piezoelectric element 11 and an annular ferromagnetic element 12, and the annular piezoelectric element 11 and the annular ferromagnetic element 12 are arranged concentrically to form a concentric annular magnetoelectric composite structure.

[0029] The concentric arrangement of the annular piezoelectric element 11 and the annular ferromagnetic element 12 can be divided into the following two situations: in the first case, the outer diameter of the annular piezoelectric element 11 is equal to the inner diameter of the annular ferromagnetic element 12, a...

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Abstract

The invention provides an adjustable annular inductor. The adjustable annular inductor comprises an annular magnetic electricity composite element and a coil which is wound around the annular magnetic electricity composite element; an annular piezoelectric element and an annular ferromagnetic element are arranged concentrically to form the composite structure of the annular magnetic electricity composite element. When an external electrostatic field is exerted, the annular piezoelectric element retracts or expands in the radial direction because of the piezoelectric effect, produced mechanical stress is transmitted to the annular ferromagnetic element in the radial direction along the annular piezoelectric element, the magnetic conductivity and corresponding inductance value of the annular ferromagnetic element change because of the piezoelectric effect, and therefore inductance is adjusted through the electrostatic field. In addition, as the annular piezoelectric element and the annular ferromagnetic element are adopted for forming the concentric composite structure, the front surface contact area and corresponding normal stress of the piezoelectric element and the ferromagnetic element are increased, larger mechanical stress is transmitted to the ferromagnetic element through the piezoelectric element, and therefore the adjustable range of the adjustable annular inductor is increased.

Description

technical field [0001] Embodiments of the present invention relate to electronic component technology, and in particular to an adjustable loop inductor. Background technique [0002] Inductance is a basic electronic device, which is widely used in common electronic devices. At present, with the rapid development of wireless communication technology, there is a large demand for adjustable inductance. Therefore, a lot of research is devoted to the development of tunable inductors with large tunability, high quality factor and low energy loss. [0003] Magnetoelectric adjustable inductance is a new type of adjustable inductance. Magnetoelectric adjustable inductance uses the piezoelectric effect and piezoelectric effect coupled by stress (or strain, displacement) to realize the control of the magnetic permeability by the electric field. The piezoelectric effect is divided into positive piezoelectric effect and inverse piezoelectric effect. The inverse piezoelectric effect main...

Claims

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Application Information

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IPC IPC(8): H01F29/00H01F29/14H01F27/24
Inventor 董蜀湘刘国希
Owner PEKING UNIV
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