Using a unique two-speed manual transmission, the Tesla Roadster’s power
comes from a 3-phase, 4-pole ac induction motor coupled with the Power
Electronics Module (PEM) which provides multiple functionality of
inverting direct current to 3-phase alternating current, the charging
system, and the regenerative braking system. The Roadster’s Energy Storage
System (ESS) provides power to the entire vehicle, including the motor.
Its durable, tamper-resistant enclosure includes: 6,831 lithium-ion cells;
a network of microprocessors for maintaining charge balance and
temperature among the batteries; a cooling system; and an independent
safety system designed to disconnect power outside the enclosure under a
variety of detectable safety situations.
The Tesla Roadster comes complete with its Electric Vehicle Service
Equipment (EVSE), a home-based charging system. An optional mobile
charging kit, for re-charging while away from the EVSE, also features this
automatic disconnect system. Charging the Tesla Roadster takes
approximately 3.5 hours. The vehicle is capable of driving up to 250 miles
(EPA Highway) on a single charge, a range roughly triple that of previous
mass-produced electric vehicles, like General Motors’ EV1.
Tesla designers and engineers have gone to great lengths to ensure that
not only is the Tesla Roadster safe to drive, but also when charging the
performance electric car, at home or on the road. Their goal is to not
only meet, but to surpass the rigorous standards of the Federal Motor
Vehicle Safety Standards, or FMVSS, as implemented by the National Highway
Traffic Safety Administration (NHTSA).
Deliveries of the Tesla Roadster are expected to begin next summer.
On the Web (links open in a new window):
Tesla Motors Inc.
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