Author Topic: EMI & placement of driver, interrupter and MIDI controller  (Read 69 times)

Offline DaiKen

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EMI & placement of driver, interrupter and MIDI controller
« on: August 10, 2018, 09:34:15 AM »
Hi all,

Given the EMI from a Tesla coil I suppose it is sensible to create a distance between the primary and secondary circuits on the one side and sensitive electronics as found in the driver, interrupter and MIDI controller on the other.
If I'm right, what is an advisable distance and/or should I put the EMI sensitive boards in a (small) faraday cage?

Hope to get some advice on this!

Kind regards,

Ton

Offline Mads Barnkob

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Re: EMI & placement of driver, interrupter and MIDI controller
« Reply #1 on: August 13, 2018, 11:29:30 AM »
Since the first SSTCs I built, where noise was an issue with drivers and interrupters being exposed to the electromagnetic field of the Tesla coil, I started to shield the controlling parts with a grounded metal sheet between primary coil and controllers. Later on I moved on to build it all into a full metal enclosure, that is grounded to RF earth.

You are correct to ask about distance to primary coil to avoid induction heating of the metal parts/enclosures. The most well known issue is properly Dr.Spark that burned off his wire mesh in a high power DRSSTC, at a distance of maybe 10-15 cm from the primary coil, so that is a obvious minimum distance for HIGH power, when we talk about 1-2 kW, you can maybe do with some 5 centimeters.

drspark.org is unfortunately closed, so I can not find the pictures from Christopher Hooper of the burned wire mesh.
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

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Re: EMI & placement of driver, interrupter and MIDI controller
« Reply #1 on: August 13, 2018, 11:29:30 AM »

 


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