Schaeffler Presents E-Motors with Outputs up to 315 kw

Today, there’s no longer any doubt that electric drive systems will make inroads into construction sites in the future. Some local governments in Germany and other countries are already banning vehicles with combustion engines from susceptible urban areas. At bauma 2025, Schaeffler presented its new high-performance heavy-duty electric motors as a volume production-ready solution for electric-only and hybrid drive systems. Due to their design, they achieve especially high torques, a power-to-weight ratio (peak) of around 5 to 7 kW/kg, and maximum efficiencies of more than 97 percent in a speed range of 3,000 to 8,000 rpm. The low losses of the liquid-cooled drive motors are essential to allow long operating times between charging cycles on construction sites and ensure efficient use of energy. Minimal losses and high operational reliability were also particularly important factors for the design of the bearing and seal. Ceramic balls reduce friction and prevent damaging passage of current.

The modular motor series consists of three variants with maximum outputs of 125, 299 and 315 kW. The only difference is the length of the active parts. The individual stator laminations and the A- and B-side bearing end shields of the motors are identical in each case and therefore facilitate especially cost-efficient manufacturing. With an overall length of 151, 206 and 261 mm and a uniform outer diameter of around 239 mm (laminated core diameter) or 280 mm (including screw connection), the motors require minimal installation space. The stator windings are designed as flat wire (continuous hairpin) windings, also known as wave windings.

Thanks to synergies from the automotive segment, the offroad sector of Schaeffler’s Bearings & Industrial Solutions division offers a comprehensive range of electric drives with a continuous output of 1 to 300 kW for the construction equipment industry. Schaeffler can supply a wide range of active-part components and complete systems such as wheel-hub drives based on permanent magnet synchronous machines. All crucial manufacturing technologies also come from a single source: the stator laminations stamped ‘in-house’, the hairpin and wave winding technology, the automatically produced coil windings, and the HV plug connector systems.

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