Re: [NSW] 3 phase AC propulsion system (was: Millennium Train sets)

["Chris Downs" <cvdowns@ozemail.com.au>]

I understood the propulsion system on the Millennium Train was to be IGBT
based, that is Insulated Gate Bi-polar Transistors, the next step on from 4
quadrant GTO (Gate Turn Off) technology.  "Modern Railways" (a UK mag.) had
an article some time ago covering IGBT systems on the Jubilee Line Tube
trains - which of course I can't lay my hands on.

QR's Tilt Train uses IGBT technology from memory.  I suspect QR's IMUs and
2nd series SMUs may also use IGBTs.

I've found the acceleration/deceleration whine on the IMUs and SMUs to be
more noticeable than on G7.

Chris

David Johnson <trainman@ozemail.com.au> wrote in message
news:38E4A999.B6D03847@ozemail.com.au...
> Hubert Lam wrote:
>
> > What would be the difference in the 3 phase propulsion system used by G7
(i.e. obvious differences
> > if i catch a ride on it) compared to other G/T sets?
>
> It sounds different.
>
>
>
> --
> David Johnson
> trainman@ozemail.com.au
> http://www.ozemail.com.au/~trainman/
> ------------------------------------
> These comments are made in a private
> capacity and do not represent the
> official view of State Rail.
> C.O.W.S. Page 11.
>
>