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Registered Member #152
Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384
some3 wrote ...
I was thinking of a other maybe possible solution What obout PWM controling the transformer.
This will work only when you already have an inductance in the circuit which limits the current to a safe value, then you can use a SCR/TRIAC phase angle controller to vary the current.
banned on 5/26/2009 Registered Member #1877
Joined: Mon Dec 22 2008, 02:03AM
Location:
Posts: 147
i know im a bit late on this, but if you used the primary of a separate transformer, you could use it as an inductive ballast on the primary side of your TC transformer. im doing this, only for my capacitor charging circuit. use the equation Y=2piFfL with Y being inductive reactance (or ohms) 2pi (2*3.14, or 6.28) f = frequency(60Hz) L =being the inductance of the inductor you are using. (the primary side of a separate transformer)
sometimes it is good to have a transformer with multiple taps so you can tune the inductance (and therefore the amoutn of current) without having to undo many wires, and find another inductor or transformer. hope i helped Nick,
Registered Member #1887
Joined: Sun Dec 28 2008, 02:19PM
Location: most na soÄi,slo
Posts: 8
I know this equation for inductive reactance. But how many ohms do I need to limit the current of the HV transformer I know I have multiple taps but anyway.
Or do I simply need a coil of a transformer for 230V whit taps every few turns?
Registered Member #1107
Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
It's as simple as ohm's law. find the reactance of the inductor you are using at the frequency you are using it at and then use I=E/R to calculate how much current will pass.
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