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Re: [TCML] Power Factor Correction
As it turns out I only needed 30 uF of capacitance.
On Tue, Jul 15, 2008 at 12:40 PM, Phillip Slawinski <pslawinski@xxxxxxxxx>
wrote:
> How do I know what direction to go with capacitance? I'm running the NST
> with my Jacobs ladder to find the right value. So far I've only found the
> wrong value, and the very wrong value. Turns out if you get it wrong you
> actually increase [dramatically] the amount of current being dumped into the
> NST. I was running it and all the sudden the aspahlt I neglected to remove
> between the core and the HV windings bubbled up from the oil. When I run
> without the PFC caps I'm drawing about 15A, with the caps I was pulling peak
> currents of 35A! If I'm increasing current does that mean my capacitance is
> too high or too low?
>
>
> On Mon, Jul 14, 2008 at 11:58 PM, bartb <bartb@xxxxxxxxxxxxxxxx> wrote:
>
>> Javatc is giving a basic calculation for PFC based on the transformers
>> specs. This is only a ball park number. You must experiment to find the PFC
>> that works best for your coil. Does you coil have a variac control, external
>> current limiting, etc.. etc.. Experiment is the only way to find the "good"
>> value for your coil.
>>
>> Take care,
>> Bart
>>
>> Phillip Slawinski wrote:
>>
>>> I just scored 20 GE Dielektrol VI caps 10uF at 370V AC @ $0.10/piece.
>>> These
>>> should be good for PF caps. I'm wondering what size PFC cap I should use
>>> for a 15/120 NST. I've noticed that the value suggested in JavaTC for a
>>> 15/60 seems to be twice that of what others [notably Gary Lau] use.
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>>>
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>
>
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