MTU C23R Manual do Utilizador descarregar pdf (Página 3)

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AC Drive Advantage

Hitachi IGBT AC drive technology,

developed in conjunction with Siemens,

provides superior performance with

higher top speeds, better gradeability

and stronger retardation due to the

higher switching frequency and better

component cooling in comparison to the

conventional GTO system.

These features increase productivity and

availability, and reduce operating and

maintenance cost.

Lower maintenance costs are achieved

with the use of a brushless alternator,

brushless cooling* and drive motors, dual

channeled air ﬂow through wheel motors

and water cooled components such as

IGBT inverter modules, alternator rectiﬁer

and blower motors.

The Siemens AC motors do not have

commutators, reducing costs and

allowing the truck to achieve higher

speeds. Less downtime and higher

speeds result in more production and

lower cost per tonne.

Full Retarding Capability

Hitachi AC drive systems provide more

rimpull than a comparable DC system.

Full retarding capability means the truck

can be almost fully stopped without

applying the service brakes.

The AC Drive Traction Motors

The Hitachi Dual Path Epicyclic

Planetary design provides high

efﬁciency and easy maintenance.

Allowing the 1st (outer) planetary carrier

to travel at wheel speed provides

lower operating temperatures - longer

lubricant life, better component life.

Grid Box & Siemens Control Unit

A low proﬁle grid box arrangement has

been designed in consideration for

operator visibility.

The new control cabinet is compact

yet accommodates blower assemblies

that cool the IGBT cabinet, drive system

alternator and wheel motors.

Rimpull

Speed

Speed

Rimpull

DC Drive

Driving

Retarding

AC Drive

Driving

Retarding

* Channeled Air Flow through the AC Wheel Motors is a

Siemens Patented Design.

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