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Magnetic isolator based on full-symmetric coil structure

A fully symmetrical and isolator technology, applied in coils, voltage/current isolation, instruments, etc., can solve problems such as low CMTI index and inconsistent capacitance, and achieve the effect of improving CMTI index

Inactive Publication Date: 2020-09-11
西安智源导通电子科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and propose a magnetic isolator based on a fully symmetrical coil structure, aiming to solve the problem of the single-layer coil structure existing in the prior art from the coil input end and the coil output end, etc. The effective capacitors are inconsistent, resulting in technical problems with low CMTI indicators

Method used

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  • Magnetic isolator based on full-symmetric coil structure
  • Magnetic isolator based on full-symmetric coil structure
  • Magnetic isolator based on full-symmetric coil structure

Examples

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Embodiment 1

[0033] refer to figure 1 and figure 2 , a magnetic isolator based on a fully symmetrical coil structure, comprising a magnetic field generating unit 1, an isolation dielectric plate 2, a magnetic field induction unit 3 and a dielectric substrate 4 stacked sequentially from top to bottom, the upper surface of the magnetic field generating unit 1, And between the magnetic field induction unit 3 and the dielectric substrate 4, each is provided with a shielding layer 5 for absorbing external disturbance magnetic fields;

[0034] The magnetic field generating unit 1 has a structure such as image 3As shown, it includes a fully symmetrical coil structure 11 and a first dielectric body 12; the fully symmetrical coil structure 11 includes a planar helical first coil 111 and a second coil 112 arranged up and down and in the same direction of rotation, and its structure is as follows Figure 4 As shown, the first dielectric body 12 is made of silicon material or aluminum nitride mate...

Embodiment 2

[0042] refer to Figure 7 , this embodiment adds an input logic module 6 and an output logic module 7 on the basis of embodiment 1;

[0043] When the input signal is a voltage pulse signal, the input and output of the magnetic field generating unit 1 are loaded with an input logic module 6 for converting the input voltage pulse signal into a differential current pulse signal, and the input logic module 6 is placed on On the dielectric substrate 4 on the side of the input end and output end of the magnetic field generating unit 1, the signal input end 61 is connected to the input voltage pulse signal, the power supply end 62 is connected to the external power supply end, and the signal output end 63 is connected to the input end of the magnetic field generating unit 1 and output, effectively expanding the function.

[0044] The output logic module 7 includes a filter module, an amplification module, and a comparison module, and is located on the dielectric substrate 4 on the o...

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Abstract

The invention provides a magnetic isolator based on a full-symmetric structure, belongs to the field of magnetic sensors, and aims to solve the problem that the CMTI index is difficult to improve in the prior art. The magnetic isolator comprises a magnetic field generation unit, an isolation dielectric plate, a magnetic field induction unit and a dielectric substrate which are sequentially stackedfrom top to bottom, wherein each shielding layer used for absorbing an external interference magnetic field is arranged on the upper surface of the magnetic field generation unit and between the magnetic field induction unit and the dielectric substrate, the magnetic field generation unit comprises a full-symmetric coil structure and a first dielectric body, the full-symmetric coil structure is embedded in the first dielectric body, and comprises a planar spiral first coil and a planar spiral second coil, the planar spiral first coil and the planar spiral second coil are arranged up and downand have the same rotating direction, the output end of the first coil is connected with the input end of the second coil through a conductor column, the conductor column is located on the rotating axis of the first coil and the second coil, the rotating axis coincides with the center normal of the first dielectric body, and the bottom face of the second coil coincides with the bottom face of thefirst dielectric body.

Description

technical field [0001] The invention belongs to the technical field of communication circuits, and relates to a magnetic isolator, in particular to a magnetic isolator based on a fully symmetrical coil structure, which can be used in a signal isolation communication system. Background technique [0002] A magnetic isolator is an electrical isolation device used in a communication system, which belongs to the field of communication circuit technology. Due to the different voltage levels between two communication subsystems, in order to ensure the safety of the equipment, an isolator is needed between the two systems. The current isolation methods used in the drive system include optocoupler isolation, capacitive isolation, and magnetic isolation. Among them, magnetic isolation mainly includes the iCoupler series products based on the transformer principle and the IsoLoop series products based on the giant magnetoresistance effect. The IsoLoop series products based on the gian...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F5/02G01R15/20
CPCH01F5/02G01R15/205
Inventor 郑峰付沛源韩涛
Owner 西安智源导通电子科技有限公司
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