Milton CAT D7E - Manual (Page 3)

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Power Train
First-of-its-kind Electric Drive delivers power and efficiency.
The electric generator, power inverter and propulsion module
in the electric drive system replace traditional mechanical
components such as a torque converter and transmission.
The Cat
® C9.3 engine with ACERT™ Technology turns
a powerful electric generator that efficiently converts
mechanical energy into AC electrical current. Electrical
current from the generator flows through specially armored
cables and military grade connectors to a solid-state power
inverter. Advanced electronics send AC current to the
propulsion module to control the motors and provides
DC current for the accessory systems.
The propulsion module delivers well-modulated torque
via axles to the final drives. Consisting of state-of-the-art
AC electric motors – and connected to the D7E updated
differential steering system – the propulsion module has no
moving electrical contacts and few moving mechanical parts.
All electrical components are fully sealed to safely operate
in a wide range of dozing conditions. Liquid cooling ensures
that the electric drive components deliver peak performance
in extreme temperature conditions.
The D7E electric drive system is highly efficient at delivering
engine power to the ground. Infinitely variable speed control,
means there are no gears to shift. Operators can concentrate
on the task and the job site, rather than on shifting gears and
managing engine speed. Training is simplified as well.
A proven differential steering system combines with
electric drive to make the D7E the only system that can
perform locked-track pivot turns for better maneuverability.
A dedicated D8-size steering pump delivers improved
performance.
Benefits
Fuel efficiency: 10 – 30 percent less fuel burned per hour.
Reduced owning and operating costs: Fewer moving
parts, longer drive train component life, reduced lifetime
service and maintenance.
Resourceful: Designed to use less fuel and fluids,
and fewer replacement parts.
Increased efficiency: Lower fuel usage per cubic yard
of material moved.
Increased productivity: More material moved per hour.
Versatility: Power, smooth operation and
maneuverability for a wide variety of applications. •
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