Quote:
Originally Posted by Generalx5
Also, if I am switching current on a solenoid quickly, to prevent arcing, is it possible that I hook up two diodes in parallel but in opposite directions? is there a better solution to this other than using diodes? I know people use diodes to lessen the EMF from the collapsing field, but if im constantly creating, destroying fields, how would I handle the EMF? with currents up to something like 40 amps..
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2 parallel diodes in oppposite orientations is a dead short. Do not do this unless you plan on letting out the magic smoke.
There are a few ways of lessening EMF:
The first is setting up a lowpass RC filter. This will allow the DC through while lowering the HF that would cause interference with other devices around. The tradeoff here is that you will slow down the time to full voltage / 0 voltage.
The second option is a faraday cage around the EMF producing device (IE motor). If set-up properly (as a flux conductor) you can retrieve most of the expended EMF energy. The drawback here is that you cannot hook this to your frame as it will conduct measurable energy on the frame which is against FIRST rules.