Camilo wrote:
> "Using high frequency HV will be more effective than HV DC in ion
> generation. "
>
>
> Ok, ionization using high frequency HV is more effective, but if I
> need for instance, a pure production of negative ions, I think that
> high frequency HV is not good to perform that because It will
> generate equally positive ions and negative ions (following HV
> alternations, in positive cycles atoms become positive, and in
> negative cycles they become negative)... ¿or what I don´t know about?
> ¿what am I wrong?(ionization process seems to be not so easy to
> understand as It looks)
You are correct. Sorry, I didn't know that you were only looking for
negative ions for your application. In this case, you want either HVDC
or pulsed DC with negative polarity being applied to the active
electrodes (usually either pointed wire tips or small diameter wires).
If you are interested in making a small negative ion generator, you can
use a simple voltage multiplier circuit (made up of diodes and ceramic
capacitors) to develop a high DC voltage right off the AC power line.
Although these devices have relatively low output, they will generate
negative ions. Some examples:
http://www.electronickits.com/kit/complete/misc/ck1103.htm
http://store.qkits.com/moreinfo.cfm/QK57
Bert
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