[PRCo] Re: More Thoughts on 1600s versus 1700s

[hwandrews1 at cs.com]

I'll add my 2 cents as a mechanical engineer, since I believe the issue is more with the mechanics than the electrics.

For any energy conversion device controlling heat is a major concern.  You always design for a specific operation temperature.  In the case of electric motors the clearance on bearings is a critical design element - typically when the motor overheats the bearings will seize.  As the motor overheats the bearing clearance will reduce, causing excess friction - move friction results in less usable work to the wheels.

Cooler temperatures allow the motors to run cooler (i.e., less bearing friction), putting more work to the wheels.

Hope this helps.

Howard Andrews
>
>You'll need an electrical engineer to explain that.  I simply know that motor
>output worses on a hot day whereas steam engines do better because the thermal
>losses are improved.
>
>John Swindler wrote:
>
>> >Fred Schneider mentioned:
>> >
>> >.........
-- Trailing quotes stripped by Listar --