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Electric buses
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July 17th 15, 10:37 AM posted to uk.transport.london
Recliner[_3_]
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Electric buses
On Fri, 17 Jul 2015 10:22:02 +0000 (UTC),
y wrote:
On Fri, 17 Jul 2015 08:40:18 +0000 (UTC)
Recliner wrote:
The motors drive a single ratio transmission with an integrated
differential. Each motor is rated at 145kW but, more importantly, together
they also deliver a whopping 590lb ft of torque from standstill. Although
the power from the motors is 48kW down on the equivalent power from the
V12, the torque peak is 59lb ft, or 11 percent, up.
I don't know why the articles bother quoting torque since the amount of torque
that reaches the wheels - which is what matters - depends on the gearing ratios
as well as the motor.
The gearbox needs fewer ratio because of the high starting torque.
Most EVs only have a one or two-speed gear box.
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