At Bauma in Munich, the Dieseko Group showed its electrical ambitions. Under the guise of ‘Founding the Future’, the company showed various solutions that are powered purely electrically; a Woltman 90Dre electric drilling rig, a PVE 24VMe electric-hydraulic vibrating hammer and an electric-hydraulic eHPU power pack, PVE 700e.
The Woltman 90DRe was developed after intensive market research and together with a customer. A unique starting point here is electrification based on capacity demand. The varying energy needs have been optimized using two permanent magnet electric motors (Danfoss-Editron) in combination with two patent-pending battery units (Webasto). This makes the Woltman 90DRe energy efficient and extremely powerful when needed.
In pursuit of the Dieseko Group’s strategy to provide zero-emission equipment, Woltman developed an electric drive, control and power supply for its first electric-powered drilling rig. This design was created in close collaboration with specialists from the industry and with BAM Infra.
Optimized electro-hydraulic drive
This zero emission high power drilling rig offers a real USP when bidding on foundation projects with zero emission regulations. The 90DRe is 100 percent electrically powered. With its electric-hydraulic power control, this 613 kW drilling rig is emission-free.
Energy is saved by the optimized electro-hydraulic drive system with different motors for specific functions (patent pending). The maximum hydraulic flow is 800 l/min and the maximum working pressure is 320 bar.
The battery capacity is more than sufficient
Woltman researched the required capacity, based on logged measurements at construction sites. The available battery capacity of 1200 kWh is more than sufficient for a full working day. Mains connection is only necessary for much heavier work to recharge during the rest period and also to be able to deliver peak power. Charging overnight is enough for another working day. The estimated lifetime of the battery packs is 20 years.
Electric-hydraulic vibrating hammer
Another novelty at Bauma was the PVE 24VMe electric-hydraulic vibration hammer. On the way to an emission-free construction site in 2030, the Dieseko Group has started the development of an electric-hydraulic vibration hammer. Where possible electrically and where enormous forces are required such as at the clamps, hydraulically.
The new electro-hydraulic vibrating hammer has a 24 kgm eccentric torque and variable torque. The variable torque provides a real USP when tendering foundation projects with zero emission regulations. It is the first model of a Dieseko electric vibrating hammer with variable torque of 0-24 kgm.
The electric drive is carried out with two IE motors with soft start. The installed power is 300 kW. The 400 V connection to the mains, batteries or both is via standardized Power-locks. The vibrating hammer has forced lubrication.
Electro-hydraulic power pack
The third electrical novelty was an electro-hydraulic power pack, the PVE 700e. This power pack is special in its use of independent oil flow systems driven by four IE3 electric motors. This makes this power pack very energy efficient.
The PVE 700e can be connected to the mains or to an AC energy source (battery pack, regen kit). The 700e delivers a hydraulic flow of 650 l/min at 320 bar. The capacity of the hydraulic tank is 1400 l.
The video below shows the construction of the Woltman 90DRe ready for the testing phase.