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Large Excavators / Loading Shovels
Comprehensive information about large excavators / loading shovels is here.
EH3500ACII
AC Drive Advantage
Hitachi AC drive technology, provides superior performance with higher top speeds, better gradeability and stronger retardation. These features increase productivity and availability, and reduce operating and maintenance cost. Lower maintenance costs are achieved with use of brushless motors and elimination of contactors. The Hitachi 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. Hitachi AC drive systems power not only rigid haul trucks, but also electric train locomotives world wide.
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
Hitachi's Double Path Tandem Planetary Design provides high efficiency. The 1st stationary planetary carrier and new lubricant cooling filtration system provide lower operating temperatures - longer lubricant life, better component life.
AC DRIVE CONTROL
Brake Blending, which combines service brakes with electric retarders, is applied automatically through the AC drive system to stop the hauler at speeds below 0.5 km/hr. Therefore, the driver can usually stop the truck with the retarding pedal only, resulting in easy operation and longer service interval for the service brakes.
Auto Cruise Control keeps vehicle speed constant within the set range by limiting the minimum vehicle speed.
Auto Retarding Control keeps vehicle downhill speed constant within the set range by limiting the maximum vehicle speed.
