Re: [TCML] DC coils

[jhowson4@xxxxxxxxxxx]

So does that mean that he was not getting the 2*Vdc on the tank capacitor? And that the charging current is still relatively low from the DC supply allowing a thin wired inductor like that to be used. or am I just completely miss understanding everything. 

On a side note if you use the charging inductor as described on http://www.richieburnett.co.uk/dcreschg.html how do you determine the core size required to not get over saturation? 


Thanks, 
John "Jay" Howson IV 

----- Original Message ----- 
From: "Peter Terren" <pterren@xxxxxxxxxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx> 
Sent: Wednesday, January 26, 2011 8:02:15 PM 
Subject: Re: [TCML] DC coils 

Syd Klinge (who did the Big Day Out the year before you in 2005) used 3 
phase rectified. From memory he didn't use a charging inductor but only a 
large air cored RF suppression inductor (like a foot or so of a TC 
secondary). 
http://tesladownunder.com/Tesla%20display.htm#BigDayOutKlinge 
and yours is here too 
http://tesladownunder.com/Tesla%20display.htm#BigDayOutCarlos 

Cheers 
Peter 

-----Original Message----- 
From: lightningfor@xxxxxxxxxxxxxxxxxxxxxx 
Sent: Thursday, January 27, 2011 6:33 AM 
To: Tesla@xxxxxxxxxx 
Subject: [TCML] DC coils 


> I am planning to build a rectified 3phase - DC tesla coil with a 
variable 
> rotary gap to give a variable pulse rate, and I am wondering about the 
use 
> of the inductor (charging reactor)... 
> I can see this is used for several purposes. 
> To limit the charging current to protect the diodes and control the 
> maximum pulse per second rate. 
> Also, to create a high impedance for the HF circuit so it can oscillate 
> with out the power supply being a short accross it... 
> I can also see that there would be an optimum size (inductance) to best 
> match a given pulse per second rate for best performance. 
> 
> What I am wondering is if it is possable to build a dc coil with a 
> variable pulse rate (without changing the inductance). 
> For example, a DC coil with a rotary gap with a variable speed drive. 
> And what effect does varying the speed of the gap have on the output? 

> Has any body had any experience with this? 
> 
> Thanks, 
> 
> Carlos 
> 


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