| ??? 08/01/07 21:04 Read: times |
#142599 - let's estimate Responding to: ???'s previous message |
For ESD, the interesting physical value is the energy of the spark.
Energy stored at 15kV in 100pF is E=1/2*C*U^2 = cca. 10mJ. The gas igniter stores energy as mechanical strain of the piezo element, until it produces the spark. A rough estimate of mechanical energy is, that it produces a spark at the trigger's travel of cca 5mm (the igniter I have here travels around 5cm and throws a dozen or so sparks at one full travel), while it requires to move with force of 20N (I think it is more with the one I have here, but this order of magnitude). That's around 100mJ. I have no exact figures, but doubt that the energy conversion is worse than 10%. I might be wrong, of course. You say you have analysed it more thoroughly - I would like to hear more details, if available. JW |
| Topic | Author | Date |
| cheap EMC testing | 01/01/70 00:00 | |
| $5 | 01/01/70 00:00 | |
| not for emmiting, for immunity against ext.field | 01/01/70 00:00 | |
| old sparky | 01/01/70 00:00 | |
| Ever been in an EMC laboratory? | 01/01/70 00:00 | |
| not \\\"scientific\\\" maybe... | 01/01/70 00:00 | |
| Why? | 01/01/70 00:00 | |
| on the value of paper | 01/01/70 00:00 | |
| Backyard susceptance testing | 01/01/70 00:00 | |
| the \"cheap\" guy | 01/01/70 00:00 | |
| EMC guys | 01/01/70 00:00 | |
| Gas igniters | 01/01/70 00:00 | |
| let's estimate | 01/01/70 00:00 | |
Try to charge a 100nF cap with your igniter | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 |