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Non-contact type current/voltage converter

A voltage converter, non-contact technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, inductors, transformers, etc., can solve the problems of power consumption and high cost

Inactive Publication Date: 2009-02-18
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the current current-voltage converters are made of operational amplifiers, which consume power and are very expensive (for example, the current / voltage converter 9018-10, which is very simple to produce by Japan Log Company, sells for more than 60 yuan)

Method used

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Embodiment

[0024] The or orientation grown by the improved Bridgman method and the (1-x)PMN-xPT crystal with a composition of 0.20≤x≤0.34 were selected as piezoelectric materials for making composite magnetoelectric materials. Magnetoelectric composite materials use Terfenol-D alloy and PMN-PT single crystal. Dimensions of piezoelectric layer, 14×2×1mm 3 , Terfenol-D size 12×2×1mm 3 . The piezoelectric material is slightly longer than the magnetostrictive material, and electrodes are drawn from the upper and lower surfaces of the extended part of the piezoelectric material. Since the piezoelectric material is long, the electrodes will be exposed a lot, so epoxy resin is used for bonding. After the sample was prepared, the change of its magnetoelectric coefficient with the DC bias magnetic field was measured as figure 2 As shown, the optimal bias magnetic field is about 350 Oe. At 350 Oe, test the change of its magnetoelectric output with the frequency of the applied alternating m...

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Abstract

The invention relates to a non-contact type current / voltage converter comprising a composite magnetoelectric material (1), a bias magnet (3), a shielding casing (4), a grounding electrode (5), an voltage input / output electrode (6) and belonging to electric device field, in which, the composite magnetoelectric material is of layer-shaped sandwich structure composed of magnetostrictive material-piezoelectric material-magnetostrictive material; the bias magnet using one block of the magnet for providing the bias magnetic field on one end or two blocks of magnets distributed left and right symmetrically for providing the even bias magnetic field; the shielding casing enwraps the composite magnetoelectric material; the shielding casing is connected with the total ground wire. The device realizes bilateral conversion among voltage-magnetic field strength-current by magnetoelectric, reverse magnetoelectric effects and Faraday electromagnetic induction effect. Compared with the traditional current / voltage converter based on electric circuit, the device has advantages of passive, bidirectional reversibility, inactive mode, fast response speed, safety, isolation, simple design, low cost and good compatibility with other devices.

Description

technical field [0001] The invention relates to a non-contact current / voltage variable converter prepared by utilizing the magnetoelectric and reverse magnetoelectric effects of composite magnetoelectric materials composed of piezoelectric materials and magnetostrictive materials, belonging to the field of electrical devices. Background technique [0002] The current-voltage converter is an important branch of the sensor, and it is a new type of component developed with the wide application of microelectronics technology in industrial automation, power grid monitoring and other fields. Voltage-current converters and current-voltage converters are widely used in the connection between amplifying circuits and sensors, and are electronic circuits of great practical value. [0003] Most of the current current-voltage converters are made of operational amplifiers, which consume power and are expensive (for example, the very simple current / voltage converter 9018-10 produced by Jap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/20H01L41/00H01L41/16G01R15/00
Inventor 罗豪甦贾艳敏焦杰赵祥永徐海清林迪潘晓明
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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