In message <4ab85d11.6030...@socal.rr.com>, dated Mon, 21 Sep 2009, Scott Douglas <sdougla...@socal.rr.com> writes:
>In a past life I had a real problem with a solenoid causing serious >EMC, primarily from the coil discharge. Due to what emission? Frequency range? >Diodes across the coil helped some, but we ended up having to create a >soft drive and a discharge circuit in order to tame the unruly beast. >So how anyone can say solenoids are benign from an EMC standpoint is >beyond me. Solenoids are normally included in equipment (or systems), so are covered by the EMC assessment and testing of the equipment (or system). While I don't necessarily want to defend ERA, it is a large organization that doe a huge amount of complex EMC work. If they had no evidence of EMC issues with solenoids, I suppose it is a very rare occurrence. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Things can always get better. But that's not the only option. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@socal.rr.com> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
