ZF has launched new two-speed electric drive for passenger cars which integrates an advanced electric motor with a shift element and appropriate power electronics. The improvement in energy conversion efficiency compared to previous e-drives extends the driving range for each battery charge. Its compact design also makes this new drive system of interest for passenger cars. The modular design of this unit can also be fine-tuned and scaled up for use in sports and performance vehicles, the company said. To increase the performance rating of the new electric axle drive system, ZF leveraged its expertise in systems to develop a new electric motor with a maximum power rating of 140 kW paired with a two-stage shift element.
“For electric vehicles in everyday use, it is important to obtain as much range as possible from each battery charge”, said Bert Hellwig, Head of System House at ZF’s E-Mobility division. “Every percent of improvement in energy conversion efficiency translates into two percent more range. Bringing together our know-how in relation to electric motors, gearboxes, and power electronics ensures that we achieve the best possible range from each battery charge”, he added.
Vehicles with the new 2-speed drive consume less energy, which in turn extends the range by up to five percent when compared to a one-speed unit. Shifts take place at 70 km/h. By connecting to the vehicle’s CAN communication it is also possible – if the customer so wishes – to devise other shift strategies, possibly linked to digital map material and GPS. For vehicle manufacturers, the new two-speed drive offers two options for using improved energy conversion efficiency.