Dynapac has developed an electric tandem roller in collaboration with in customer, Skanska, in Sweden. The new machine, which is currently undergoing field-testing, is designed to compete in the 1.5 tons tandem vibratory roller class. It features a drum width of up to 1.0 meters, develops a centrifugal force of 16.7 kN, a nominal amplitude of 0.4 mm, and a static linear load (front/rear) of 6.1/ 7.9 kg/cm. But, unlike the diesel fuelled model upon which it is based, the new CC900 e tandem vibratory roller produces zero emissions at the point of operation.
Weighing in at 1.6 tons and with an operating width of 0.8 to 1.0 meters, the CC900 e double-drum vibratory roller has been designed to satisfy the specific demands of utility contractors and rental fleet operators alike. It delivers the same linear load, amplitude, frequency and travel speed as the diesel-powered model upon which it is based.
Fredrik Åkesson, application specialist – compaction, Dynapac, said: “We have seen electric and battery power being applied to mini excavators, skid-steer loaders, access equipment and site dumpers. And these have been widely welcomed by forward-thinking and environmentally-aware rental fleet operators and contractors. The only thing missing has been an electric-powered tandem vibratory roller to run alongside these other zero emissions machines. With the development of the CC900 e, Dynapac has taken a massive technological step. We are proud to be the first realizing this from a concept machine into something we now have on the field.”
The CC900 e has been in development for more than two years and involved a 20-person research and development team. From the very beginning of the research and development phase, Skanska has reviewed specifications and prototype machines. The battery system has been subjected to rigorous testing to ensure that it meets the specific needs of the compaction equipment sector and is capable of withstanding the vibration generated by the roller. During that testing, prototype machines have clocked a massive amount of hours in operation. Another Dynapac customer, Loxam, will start field-testing of the CC1000 e model within a few weeks.
Fredrik said, “Co-operation is the key to developing a successful product and direct user input is incredibly valuable to a project of this kind. From the user perspective, it is equally important to be acquainted with the equipment at an early stage. Even though the compaction performance is unchanged, there are still small changes that have to be the work procedures when transitioning from traditional fossil fuel to electric power. The earlier operators can be exposed to those changes, the easier it will be to adapt to the new equipment.”