analyzes the problem from the main factors of the source, approach and the sensitive equipment .
(2) Based the analyses of the standard ring wave and oscillatory wave in the Time domain and Frequency domain, filter is designed. The attenuation effect is validated by the experiment. The sensitive equipment can endure the 4-level immunity test of IEC61000-4-12 when filer is used.
Through the investigation of influence of voltage dips on industrial user and sensitive equipment in Quanzhou area, the withstand ability on voltage dips for sensitive equipment was known. At the same time, voltage monitoring on the bus of 110 kV substation and calculation for power network were carried out, and the measures for slowdown voltage dips were finally put forward, such as reinforced equipment protection, reducing the frequency of faults, shortened fault clearing time.
By introducing the protection operation characteristic into the CBEMA (Computer Business Equipment Manufacturing Association) curve, the secure work region of sensitive equipment under voltage sags and the sag mitigation capabilities provided by current protection under system faults are presented and modeled. And then the maximum sag protection capabilities of current protection and the size of the secure work region can be achieved.
文中将三段式电流保护动作特性引入CBEMA(Computer Business Equipreent Manufacturing Association)敏感特性曲线中,提出了电流保护的电压跌落安全域评估模型及保护性能评估模型,有效地衡量了线路电流保护可以提供给敏感设备安全运行的有效区域以及最大电压跌落保护能力。
After a brief introduction to the system configuration of a motor-driven image acquisition system the paper gives a comprehensive analysis on the three key electromagnetic environmental elements of the equipment the source of the interference coupling path and the sensitive equipments.
This paper simply introduces the problem of electromagnetic compatibility in modern complicated electromagnetic environment with the development of electron technology,comes up with three factors of electromagnetic interference: source of electromagnetic interference; coupling approach and sensitivity equipment.
The basic principle of electromagnetic shield (EMS)and the relative knowledge about electromagnetic interference shielding were mainly discussed,the electromagnetic interference shielding (EMS) coatings which were developed in recent years at home and abroad was described,and the research and development in present for EMS coating at home and abroad was summarized in the paper , consequently, the reference was provided for solvingthe problemfromsensitivefacilitieswhichwereinterferedbyelectromagneticwaveand investigatingtheEMSmaterialsinthefurther.
This article from the electromagnetism interfere source,the coupling way,the sensitive device three essential factors obtains,introduced three at present commonly used electromagnetic compatibility design method: test revision method,standard method and system design method.
The results reveal that near fields in a range of 200 m constitute the most severe threat to sensitive facilities and systems, which should be highlighted in the study of LEMP environmental forecasting.
A hybrid control platform is investigated in this paper to mitigate microvibrations to a group of vibration-sensitive equipment installed in a microelectronics facility subject to nearby road vehicle-induced horizontal and vertical ground motions.
We have repeated these measurements with very sensitive equipment over a range of frequencies up to several kHz and down to temperatures of 1.2° K.
Finally, a comparison is made with the accuracy of existing highly sensitive equipment.
Application of a Common-Mode Choke 6.7.3 Shielding Sensitive Equipment The path of common-mode emissions can be diverted from sensitive equipment.
A simplified analysis of the retained voltage at sensitive equipment nodes during symmetrical faults is presented in Section VI.
Past experience has shown unknown conducted noise in the plant ground grid as the predominant EMI issue for susceptible equipment.
The paper describes the short trancients in power systems as well as their sources, coupling modes and disturbing effects on sensitive equipment.The paper also presents the measurement instruments of short trancients From comparison it may be concluded that the digital storage oscilloscope(DSO) is more adequate instrument suitable for field measurement of short trancients In addition, the determining methods of main technical parameters of DSO are involved.
The optimization of the military packaging lays stresses on thelong-term storage. protective functions. transporting load, ultra-climate conditions and replicated applications etc. This paper intr-oduces the protective packaging for impact sensitive equipments andillustrated by diagrams.
Based on analysis of sources and paths of interference and sensitive equipments, shielding technique was studied in dynamic stress measurement on bogie structure. The paper sums up the hardware techniques, such as compound protection, earthing, power source and the software techniques, such as zero drift signals process, digital signals filtering process, little wave signals process. Good results in application are obtained.