If mechanics knew how to deliver pulses properly, they'd be using shielded high voltage coax for both EMI shielding and good waveform!! Everyone would be happy!
Hans From: "Fred Townsend" <f...@poasana.com> To: "Price, Ed" <ed.pr...@cubic.com> Cc: "'Peter Conboy'" <peter.con...@piresearch.co.uk>; <emc-p...@majordomo.ieee.org> Sent: Monday, March 17, 2003 10:41 AM Subject: Re: Racing Car EMC > > Ed, the ignition systems on race cars are formidable EMI sources. Furthermore > racers tend to disdain of EMI suppression. I have heard many of a mechanic say > with reference to stock cars, the first thing they do is to soap one up is "Rip > > out all that suppresser crap" (meaning EMI suppression). Fiberglass bodies such > > as used on the Corvette are very difficult to quite down because of the lack of > a good frame ground and shielding. > > As for standard I don't have a political recommendation but from a operational > standpoint I would recommend aviation standards. > > Fred Townsend > > "Price, Ed" wrote: > > > >-----Original Message----- > > >From: Peter Conboy [mailto:peter.con...@piresearch.co.uk] > > >Sent: Monday, March 17, 2003 1:50 AM > > >To: 'emc-p...@majordomo.ieee.org' > > >Subject: Racing Car EMC > > > > > > > > > > > >Anyone out there got an opinion on what standards should be > > >applied for the > > >electronics fitted to racing cars - F1, CART, IRL etc.????? > > > > > >Because of the environment, the need for absolute reliability, and the > > >safety critical application (e.g. throttle, clutch, steering, chassis > > >control) we take things seriously, but do not actually "CE" or > > >"e" mark. The > > >tests I do generally cover "e" and exceed most standards as > > >actually I try > > >and "break" the box rather than just go to the standards limit. > > > > > >I am having a bit of a debate inside my company, because > > >95/54/EC refers to > > >only vehicles on rhe road, and racing cars are "off road" and therfore > > >implies "CE" as a catch all This to me is wrong as patently > > >its a vehicle, > > >"CE" may be broader on the immunities, but is less severe on > > >the radiated > > >stuff. Given the self contained nature of the car, it is the radiated > > >immunities I feel I should be most concerned with once I'm sure engine > > >sourced interferences have been dealt with. > > > > > >Also CE and "e" are EU, whats the legal U.S. position? - I > > >stress legal > > >because the teams themselves don't care. > > > > > >Thanks > > > > > >Peter > > > > > > > Peter: > > > > What kind of an RF environment does a race car experience? There's an audio > > link to the driver, a telemetry link for structural data, and possibly a > > video link for a car camera. And then all the similar links for the other > > cars. Does the car see any special exposures on the course (Doppler radar?) > > or in the pits (noisy service tools)? And, are there any unusual operational > > conditions, like running without a battery (saves weight, more ripple) or > > operation of heavy actuators or solenoids? > > > > Regards, > > > > Ed > > > > Ed Price > > ed.pr...@cubic.com > > Electromagnetic Compatibility Lab > > Cubic Defense Systems > > San Diego, CA USA > > 858-505-2780 (Voice) > > 858-505-1583 (Fax) > > Military & Avionics EMC Is Our Specialty > > Shake-Bake-Shock - Metrology - Reliability Analysis > > > > ------------------------------------------- > > 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: > > majord...@ieee.org > > with the single line: > > unsubscribe emc-pstc > > > > For help, send mail to the list administrators: > > Ron Pickard: emc-p...@hypercom.com > > Dave Heald: davehe...@attbi.com > > > > For policy questions, send mail to: > > Richard Nute: ri...@ieee.org > > Jim Bacher: j.bac...@ieee.org > > > > 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 > > > > ------------------------------------------- > 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: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > 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 > 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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
