Quote:
Originally Posted by Jmac
Adding mechanical complexity, cost, and weight isn't going to increase reliability. Electric motors running at top speed typically isn't an issue. We have some 50 HP fans at my work that have been running 24/7/365 (except a few hours a year for maintenance) for 25 years without any problems.
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Isn't the heat from inrush current usually what's harder on motors than runtime? I know the ones I deal with from time to time have each startup equal to X number of running hours (maintenance wise) and if you start it up too many times in an hour it locks out until it's been given enough time to cool. I assume they must do something to keep the magnetic field from collapsing otherwise city driving would nuke these things pretty fast.
Quote:
Originally Posted by Jmac
Electric motors are also typically most efficient near their top speed.
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Which they aren't at most of the time. I would think if you could gear it down it could run closer to top speed all the time and gain efficiency, but maybe not enough to offset the added weight and driveline losses.
Quote:
Originally Posted by 68style
I asked her to explain how spending $50k+ on a new Tesla saves money on driving an already paid for Matrix that will never have problems... especially given he drives 10km a day tops. Silence... and then some mumbling about gas prices.
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10km/day, say 10L/100km, even at $2/L that'll take 96 years to pay off with fuel savings
