A wide temperature and high DC high reliability Ethernet transformer

A network transformer and high-resistance technology, which is applied in the field of Ethernet communication, can solve the problems of reducing product reliability and failing to meet the use requirements, and achieve the effect of reducing the influence of stress on the magnetic core, effective magnetostrictive space, and reducing the impact

Active Publication Date: 2019-09-03
CHINA AEROSPACE TIMES ELECTRONICS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ordinary Ethernet transformers, due to the use of ordinary ferrite magnetic materials and traditional hard glue direct packaging technology, cannot meet the requirements of extreme temperature, loaded bias current, and high-radiation vacuum environment in space, thus reducing the overall product quality. reliability

Method used

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  • A wide temperature and high DC high reliability Ethernet transformer
  • A wide temperature and high DC high reliability Ethernet transformer
  • A wide temperature and high DC high reliability Ethernet transformer

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Experimental program
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Embodiment

[0026] The network transformer produced using the magnetic material and packaging structure described in the present invention has good electrical properties, and its key electrical property - the inductance at high and low temperatures has significantly improved compared to ordinary transformers, as shown in Table 1 and Table 2 , so that the transformer has an effective signal amplitude under high DC and wide temperature range working conditions, ensuring reliable and error-free signal transmission.

[0027] Table 1 produces the inductance of transformer by the present invention

[0028]

[0029] Note: 8mA bias current is added for testing, and the signal amplitude above 350uH has an effective signal amplitude.

[0030] Table 2 Inductance of common transformers

[0031]

[0032] Note: 8mA bias current is added for testing, and the signal amplitude above 350uH has an effective signal amplitude.

[0033] Through the above comparison, it can be seen that the key electric...

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Abstract

A wide temperature range high direct current resistant high-reliability Ethernet transformer comprises an outer shell, and 16 leading-out terminals injected in the outer shell; a first set of isolation coils, a first set of common mode coils, a second set of common mode coils and a second set of isolation coils are accommodated in the outer shell from left to right; leading-out wires of the coils are in order welded and conducted with the leading-out terminals of the shell in a soldering manner; and silica gel is filled between the coils, and finally epoxy resin glue is encapsulated in the whole shell cavity. A wide temperature range high direct current resistant annular magnetic core is adopted and capable of bearing high direct current, after the high direct current is loaded, and inductance values of the annular coils cannot be decreased obviously. In addition, a low stress encapsulation control technology is adopted, packaging stress is reduced, so that the magnetic core has an effective magnetostrictive space, sensitivity of magnetic materials to the stress generated by temperature jump is reduced, the transformer can be ensured to generate effective signal amplitudes, and signal transmission stability and reliability can be ensured.

Description

technical field [0001] The invention relates to an Ethernet transformer, in particular to a wide temperature and high DC high reliability Ethernet transformer, which belongs to the technical field of Ethernet communication. Background technique [0002] Ethernet transformers use magnetic field coupling to transmit AC signals, and use primary and secondary physical isolation to filter stray common-mode signals, which play an important role in ensuring chip signal transmission, signal filtering, and system protection. [0003] Ordinary Ethernet transformers, due to the use of ordinary ferrite magnetic materials and traditional hard glue direct packaging technology, cannot meet the requirements of extreme temperature, loading bias current, and high-radiation vacuum environment in space, thus reducing the overall product quality. reliability. Therefore, it is urgent to design a wide temperature, high DC and high reliability Ethernet transformer to improve the limit temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/02H01F27/24H01F27/28H01F1/10
Inventor 陈继伟孙坤明王祥甘军宁李翔
Owner CHINA AEROSPACE TIMES ELECTRONICS CORP
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