Four of the e-models are fitted with oscillation drums, two of which are said to be the world’s first e-combination rollers featuring oscillation
Hamm has presented eight fully electric battery-driven tandem rollers in the compact class.
Four of the e-models are fitted with oscillation drums, two of which are said to be the world’s first e-combination rollers featuring oscillation. This is where the already quiet oscillation meets with the quiet e-drive resulting is quiet compaction machines that produce no emissions and cause very few vibrations in the surrounding area, the company said.
The vibration or oscillation unit is driven by electric means only via specially designed, compact synchronous motors. As a result, the efficiency rating more than doubles and the energy demand reduces accordingly too, Hamm says.
In February 2021, Hamm AG said it had achieved ISO 14001 certification for its environmental management system and, later in the month, Bobcat said it was addressing light compaction needs with its new product range.
The HD 10e model and the HD 12e model are said to boast the same compaction power as their combustion engine counterparts, but produce zero emissions.
Compared to the diesel machines, Hamm says they save approximately 10kg CO2 every hour of operation. The e-rollers, which are operated in exactly the same way as the other models in the HD CompactLine series, will initially be available for the European market only.
One Li-ion battery with a capacity of 23.4kWh provides the energy for the travel, steering, and vibration or oscillation drives via a 48V system. The battery can be charged via a rapid-charge plug a standard plug with a full charge taking approximately four hours (400V) or approx 7.5 hours (230V).
In August 2021, Hamm said it was increasing productivity with its new HP series of pneumatic rollers.
The HAMMTRONIC control system monitors and controls the components of the zero-emissions rollers while an automatic electric motor is featured as standard. This deactivates all functions when the machine is idling, thereby reserving battery capacity, the company concluded.