EMI and Sparks
Paul Wareham
effects resulting from sparks. I guess what I'm looking for is in effect:
"the anatomy of a spark" I'm especially interested in sparks and arcing
generated as a result of electromechanical relay operation, spark-ignition
engine plugs, and power switching of large loads with mechanical switches.
How does one go about establishing the E and H field intensities,
frequencies, etc?
John Woodgate
<war...@dynagensystems.com> writes
With great difficulty. The frequency range is not dreadfully difficult -
a broad-band spectrum up to around 300 MHz, with humps and bumps due to
parasitic resonances in the generating circuit. Not so much above 300
MHz, as you can see from the relative immunity of UHF television to
interference from sparks. But the field strengths are very difficult
even to measure with any confidence, let alone calculate. They vary
greatly with position, especially close to the source. I suppose you
can deduce general conclusions from measurements, but they are not much
good for anything else.
--
Regards, John Woodgate, Phone +44 (0)1268 747839 Fax +44 (0)1268 777124.
OOO - Own Opinions Only. You can fool all of the people some of the time, but
you can't please some of the people any of the time.