Title :
Reduction of conducted emission for UPSs using passive EMI filters
Author :
Khan-ngern, Werachet ; Prempaneerach, Yothin
Author_Institution :
Fac. of Eng., King Mongkut´´s Inst. of Technol., Bangkok, Thailand
Abstract :
In this paper, an appropriate EMI filter for an uninterruptible power supply (UPS) is implemented. Two types of UPSs, off-line and true-on line, are, tested with operating common and differential modes with resistive load. A testing and measurement of conducted emission based on international standards, CISPR 16-2 and CISPR 22, and product standard of UPS (EN 50091-2) are performed with limits of main terminal interference voltage according to rated output current and the class B of UPS under test. The commercial and modified passive filters are verified for suppression of conducted emissions,
Keywords :
conformance testing; electromagnetic compatibility; electromagnetic interference; interference suppression; passive filters; power filters; uninterruptible power supplies; CISPR 16-2; CISPR 22; EMC; EN 50091-2; UPS application; conducted emission suppression; differential modes; international standards; offline type; passive EMI filters; product standard; resistive load; true-online type; uninterruptible power supply; Attenuation; Electromagnetic interference; Impedance; Insertion loss; Measurement standards; Passive filters; Power supplies; Testing; Uninterruptible power systems; Voltage;
Conference_Titel :
Circuits and Systems, 1998. IEEE APCCAS 1998. The 1998 IEEE Asia-Pacific Conference on
Conference_Location :
Chiangmai
Print_ISBN :
0-7803-5146-0
DOI :
10.1109/APCCAS.1998.743709
