2015-06-27, 17:41
Isolation transformers can (depending on type) transduce several 100kHz, so this probably won't work very well and is expensive.
I'd recommend putting a choke between the PSU and the controller. Make as much as possible windings on a Epcos T37 ring core, or N30. This will help, if the noise is coming from the power line.
I made some measurements on that:
But as i said earlier, a clean grounding is most important for e-field. Vertical ground rods don't work well, because the current is seperating at earth surface due skin effect, leaving a big ground resistance.
Ideally large expanses of vertical wires just below earth surface are used. the more and the longer, the better.
But a direct wire to the water supply pipe will be enough for our purpose in most cases, as long the pipe is of metal and not PVC.
I'd recommend putting a choke between the PSU and the controller. Make as much as possible windings on a Epcos T37 ring core, or N30. This will help, if the noise is coming from the power line.
I made some measurements on that:
But as i said earlier, a clean grounding is most important for e-field. Vertical ground rods don't work well, because the current is seperating at earth surface due skin effect, leaving a big ground resistance.
Ideally large expanses of vertical wires just below earth surface are used. the more and the longer, the better.
But a direct wire to the water supply pipe will be enough for our purpose in most cases, as long the pipe is of metal and not PVC.
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