Hitachi Construction Machinery announces the sale from September 1, 2008, of the EH3500AC II rigid dump truck (Gross Machine Weight 325 tons, 185-ton payload class) for international use in large-scale mining.
The EH3500AC II utilizes AC drive technology from Hitachi, Ltd. using its most recent Insulated Gate Bipolar Transistor (IGBT), and based on the inverter technology used in high-speed railway trains.
Power transfer to the road is more efficient using the AC drive system. By eliminating heavy rotating components such as the transmission and differential components found in mechanically driven trucks, more of the power supplied by the diesel engine is transferred to the haul-road, and the maintenance costs for lubricating oil for these devices are reduced. Hitachi’s brushless AC travel motors along with the latest Hitachi IGBT inverters reduce repair costs and deliver stronger, more controllable electric braking power (retarding) compared to the EH3500AC II’s DC-powered predecessor.
The EH3500AC II is powered by a Cummins QSK 50 engine that is known for extended service life and fuel efficiency. This engine has been certified to the Tier 2 (U.S.) EPA Emission regulation.
The EH3500AC II includes the following features: