EFT research of SPI-DeviceNet protocol converter

With the rapid development of electronic equipment, the problem of electromagnetic compatibility has become a hot topic. Good electromagnetic compatibility is the safeguard of the liable function of equipment. Based on the analysis of the mechanism of transient pulse interference, a comprehensive EF...

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Bibliographic Details
Published in2016 IEEE International Conference on Mechatronics and Automation pp. 846 - 850
Main Authors Chao Jia, Shiqin Cao
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2016
Subjects
Crystals
Electric fast transient pulse group
Electromagnetic compatibility
Inductance
Interference
noise immunity
PCB design
Power supplies
Transient analysis
Voltage control
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Summary:With the rapid development of electronic equipment, the problem of electromagnetic compatibility has become a hot topic. Good electromagnetic compatibility is the safeguard of the liable function of equipment. Based on the analysis of the mechanism of transient pulse interference, a comprehensive EFT suppression method is proposed for SPI - DeviceNet protocol converter. Through the improvement of crystal oscillator circuit structure, the ferrite beads to enhance the capability of the high frequency interference suppression; Isolation and shielding measures is taken in the power supply circuit; A common mode choke coil is added in the driving circuit of DeviceNet to suppress the common mode interference of DeviceNet signal line and the layout of the circuit board, wiring is also optimized. At the same time, anti-jamming methods are used in software, including digital filtering, watchdog timer, data redundancy and so on. The results show that the anti-interference ability of the SPI-DeviceNet protocol converter is improved, which can meet the requirements of the EFT/B 4 stage immunity test. Moreover, the method can provide reference for the study of the fast transient pulse group interference of similar floating ground (no protection grounding) equipment.
ISSN:2152-744X
DOI:10.1109/ICMA.2016.7558672