Re: Solid State Voltage and Current Regulator (fwd)
From: Tesla List Owner[SMTP:listown-at-pupman-dot-com]
Sent: Sunday, January 04, 1998 2:48 PM
Subject: Re: Solid State Voltage and Current Regulator (fwd)
---------- Forwarded message ----------
Date: Fri, 2 Jan 1998 22:34:20 -0700
From: Bill Noble <william_b_noble-at-email.msn-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Solid State Voltage and Current Regulator
beware that if the transistors fail they will (typically) short, so you will
suddenly burst up to full power - this may not be a good thing.
also, you said "dissipates" 3 KW - did you really mean that it will pass
3KW??? I would hope the dissipation is much lower than 3KW.
>From: Richard Wayne Wall[SMTP:rwall-at-ix-dot-netcom-dot-com]
>Sent: Friday, January 02, 1998 4:35 AM
>To: Tesla List
>Subject: Solid State Voltage and Current Regulator
>Happy New Year ALL!
>My first unit is a single Darlington which handles 400 A continous up
>to 1200 V. It has about a 3 1/2" x 4" footprint and disapates over
>3100 watts. I mounted it on a huge multifinned Al heat sink. No
>overheating so far in my tests. The Darlington has reverse EC and EB
>diode protection of 1200 V and 400 A and 4000 A peak. The transistor
>turns on and off in 30 uS at 400 V into a resistive load. The standoff
>voltage of the module case is 2500 V.
>Using my single Darlington BPT module, I connect it with a large high
>power diode bridge that I made up. The collector is connected to the
>positive side of the bridge and the emitter is connected to the
>negative side of the bridge.