"Capitol" wrote in message
...


The Natural Philosopher wrote:
Power electronics has changed a LOT in te last 25 years actually.

I repeat, power electronics has changed very little in the past
25years. I hold patents on power motor drive systems from 1962, which
are still technologically valid today!! FETs are a very minor step in
the development of power switching devices. Only the pricing has really
changed. Microprocessor control replaces, in many cases the original
analogue system. A similar example is washing machine controls, which
were designed as solid state in the early 1960's and are still
mechanical switches in many cases today. Anyway, in terms of prolonging
the life of your car, I've never seen any substitute for changing the
oil regularly. Another example where there has been little real change
in 60 years!

There is no substitre for using the very best oil - fully synthetic, which
wasn't available for cars 60 years ago.



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