[LINK] Standards, please! The third coming of electric vehicles
rchirgwin at ozemail.com.au
Sun Apr 22 16:42:02 EST 2012
Let's say, rather, that they're not yet on the market ...
On 22/04/12 1:07 PM, Karl Auer wrote:
> On Sun, 2012-04-22 at 10:09 +1000, David Boxall wrote:
>> On 22/04/2012 2:02 AM, Frank O'Connor wrote:
>>> - Why not install multiple smaller engines in an electric car?
>>> - Why not install them in the wheels?
>> A small matter of physics. That arrangement might work at very low
>> speeds and/or on extremely smooth roads. The problem comes when you hit
>> a bump.
> Something we agree on! Multiple motors - yes, maybe. In the wheels,
>> Adding a motor increases the weight of the wheel. Vehicles employing
>> so-called wheel-motors have been made (might still be in production),
>> but none give a very comfortable ride, particularly at speeds above
>> walking pace.
> They work well in unsprung and/or slow vehicles (electric bikes, for
> example). Otherwise, nope.
>> characteristics. Unfortunately, the necessary axles and constant
>> velocity joints add to costs
> Multiple electric motors can be governed by software of course, meaning
> that no diff is needed, but as far as I know noone is actually designing
> cars like that - yet :-)
> Regards, K.
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