Hi all.
Forgive me for the following (perhaps) silly question, but I'm not an expert in these topics. I need to perform conducted emission test (220Vac port) according to EN55011, on an industrial power driver (25 kHz Switch Mode Inverter). Depending upon the application, one to ten drivers can be paralelled on the same 220V line. Each driver is indipendent from the other (i.e. no sync is provided), output power and waveform can be equal or different. The switching frequency is obtained via a high frequency clock (20MHz), thus it will be very similar for all the drivers. Emission will be both Common and Differential Mode. If I measure the emission for one driver, would it be possible to derive the emission level when two or more drivers are present (at least a worst case)? If yes, how to do it? Does the noise add up linearly (so that I have to add 6 dB for two driver, 20 dB for ten in the worst case - the noise from each driver has the same frequency and phase) ? Thanks in advance Francesco ing. Francesco Campedelli R&D - HW Design ALSTOM FERROVIARIA s.p.a. via di Corticella, 75 40128 Bologna - ITALY This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
