Re: Solid-State Marx (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Fri, 15 Jul 2005 10:56:33 -0600
From: Gomez Addams <gomez@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Solid-State Marx (fwd)

Have you calculated your peak discharge current yet?  >:)

On Jul 15, 2005, at 8:55 AM, High Voltage list wrote:

> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Fri, 15 Jul 2005 13:17:13 +0930
> From: Matthew Smith <matt@xxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Solid-State Marx
>
> Hi All
>
> This idea started off as something driven by the flash unit from a
> disposable camera until I realised that I'd forgotten about driving the
> MOSFET gates!
>
> Here's the schematic:
> <http://www.mss.cx/img/ssmarx1_sch.png>  (image 917x348px, 5.8kbytes)
>
> I have a rail of spare MOSFETs that can be used in this design:
> PHP6N60E; Vdss=600V, Id=5.4A, Rds[on] < 1.8 Ohms
>
> Capacitors are photoflash types from disposable cameras.
>
> Assume that the input voltage to the circuit is about 250V.
>
> What would be the best way to achieve switching of the charging
> transistors?  Put gate windings on the step-up transformer for
> synchronous rectification (lose the diode)?
>
> (I'm going to worry about the discharge part once I've got the charging
> sorted.)
>
> Cheers
>
> M
>
> -- 
> Matthew Smith
> South Australia
> http://www.kbc.net.au
>
>
>