How They Work
EVT Electric Scooters use an electric hub motor that is part
of the rear wheel. Power comes from the four sealed batteries that are charged
overnight with the automatic battery charger from a domestic 240v power point.
The power is delivered to the motor via an electronic controller
that regulates the amount of current the scooter needs for the job at hand.
Other than that, the electric scooter looks and
operates just like any other scooter, except for the fact that it is quiet, smooth,
and there is no need to “start” the motor. Just turn the key
and twist the throttle.
 What’s
a Hub Motor?
The Hub Motor on EVT electric scooters is a patented electric
brushed motor that is part of the actual rear wheel. This means that one half
of the motor (the coil side) rotates with the wheel, while the other half (the
magnet side) is fixed to the axle.
The only things that wears out and need regular maintenance are
the motor brushes. These are cheap and easy to replace.
Nothing else moves on the electric scooter apart from the brakes
and the twist of the throttle. Because there is no gear box or chain, energy efficiency
is not lost through the drive train, noise is reduced, and there are no moving
parts, apart from the motor and brakes, to maintain or repair.
What is a Controller?
All electric vehicles have an electronic “black box”
that interprets the signal from the throttle (the low current side of the controller)
to then control the voltage and current that needs to be sent to the motor (the
high current side). 
The controller also monitors the motor and the batteries so that
it can use the power of the batteries in the most efficient manner. EVT have designed
and produced their own electronic controller specific to their own scooters that
achieves a very low energy per km ratio.
This controller also acts as a self diagnostic tool if there
is a malfunction in the scooter, enabling a more accurate and speedy diagnosis
of the problem, with faster and cheaper repairs.
Batteries
The batteries in EVT electric scooters are sealed maintenance free batteries
specially designed for cyclic use. They will last for up to 350 full cycles. This
means that if they are looked after with proper charging, they will last for something
between 15,000 and 18,000 kms*.
As new battery technology enters the market, it’s a simple task to replace
the current generation of batteries with newer ones. Your electric scooter will
run on any batteries as long as they produce the correct voltage output.
And because the electric scooter has so few moving parts, it will keep going
for as long as there are batteries to power it. Electric motors will last many
more years than an internal combustion engine.
Replacing the batteries is simple and cost effective and can be done at your
local scooter dealer.
*
Battery life and the range of the scooter are a function of payload, terrain,
tyre pressure, and correct charging procedures.
While these figures give a general picture of the performance of the batteries,
they should not be taken as a guarantee of performance.
Charger
EVT electric scooters come with an “Intelligent”
charger that reads the state of the battery as it charges. This charger prevents
over charging of the battery, even if left on for extended periods. The chargers
can be plugged into any 240 volt outlet.
Charging batteries is the key to battery life and performance.
Batteries left in a discharged state for extended periods will shorten the life
of the battery and interfere with its performance.
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