Greetings IEEE EMC-PSTC forum members and experts.
I am looking to answer some questions concerning the EMC testing of portable commercial and industrial equipment; specifically the testing of motors at “no load”. I have my own “opinions” and experience concerning these questions but I would like to get some factual data (standard reference) and documented EMC standard design philosophy if at all possible. I was hoping the IEC guide 107 would have noted this design philosophy but unless I missed it I did not see it. 1. Can someone explain how and why “no load” frequently occurs in EMC test standards? See CISPR 14-1 section 7.3 for example. 2. Why is “no load” used and why isn’t a loaded or partially loaded motor used? (other than “testing for all possible working conditions is not practical for technical and economic reasons”). Is this representative of “real world” conditions? If not how is it correlated to the “real world?” 3. Typically do the limits included in EMC standards correspond (or are reduced) to the actual application? How is this correlated to “real world” applications? Or is this covered in statements such as: “the limits given in this standard take into account uncertainties” (from CISPR 12)? As always, I look forward to your comments. Regards, Curt ______________________________________________________ Curtis Bender | T: 616.994.4221| F: 616.994.4127 Global Technical Approvals/Lead Project Engineer Tennant Company | Creating a cleaner, safer world for 135 years. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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 [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
