Re: [NSW] AC traction motors for Tangara's?

["Hubert Lam" <hubert@imap4.com>]

I must see for myself when I go back to HK at the end of this year for the chopper motors! The first
generation MTR cars were manufactured by Metro Cammell of England. The overhaul included bascially
rebuilding the front of the trains, painting the handrails red, and route maps that include lights
that tell you the stations that already have been through.

The camshaft controls was very good though and acceleration was very smooth, but am yet to see what
the chopper controls do :-)

and btw, those 1st-G trains were introduced in 1980 with air conditioning. what did WE have in
1980??? damn it S sets!!!! (OK, a K set or two but they were rare!)



"Chris Downs" <cvdowns@ozemail.com.au> wrote in message
1fxR4.16105$PL4.393827@ozemail.com.au">news:1fxR4.16105$PL4.393827@ozemail.com.au...
> Hong Kong converted their first generation (?) underground trains from
> camshaft to chopper control at their mid-life overhaul.  This was mentioned
> in "Modern Railways" UK mag some time in the last 12-18 months.  Electricity
> consumption savings and maintenance savings will more than pay for the
> conversion.
>
> Chris
>
> Matthew Geier <matthew@mail.usyd.edu.au> wrote in message
> 8f4ucc$38v$1@metro.ucc.usyd.edu.au">news:8f4ucc$38v$1@metro.ucc.usyd.edu.au...
> > In article <8f2q5g$9qu$1@nnrp1.deja.com>,  <eikkert@my-deja.com> wrote:
> > >
> > >> How economically viable is it to convert the system over to AC? Cost
> > >> versus benefit?
> > >
> > >Personally, I doubt it'd be done en masse, not yet. Perhaps in a half
> > >life overhaul?
> > >
> >
> >  The first Tangara sets are nearing half-life overhaul stage. Nearly 15
> years
> > since the first one arrived and did all those promotonal runs for the
> Unsworth
> > electon campain towed by a diesel.
> >
> >  It is also not known internationally for EMU's to be refitted with
> different
> > motor control technology at their mid-life heavy overhaul. I have read of
> > cam-shaft DC emu's becommng VVVF inverter AC motored EMU's. (Washington
> DC?)
> >
> >  A Tangara would be relatively easy to convert, as the traction system is
> > modular. At the half-life refit they would be replacing the power cables
> > anyway, so at that time they can make sure the motor feed cables are
> suitable.
> > The actual chopper unit is in a easly removeable pod. No problems there.
> The
> > motors are also modular - replace the bogie!
> >
> >  Recently I thought I heard a T set make noises like G7. I thought I was
> > imagining things. Possibly not....
> >
>
>