Efficiency of electric cars is vitally important because they don’t have lots of excess energy to waste like conventional cars do.Electric cars are still relatively new technology. Their gasoline and diesel powered cousins have had more than a century to work out the kinks and you have to admit, they have gotten pretty good at what they do. They are smooth, powerful, and robust.
One of those innovations is an externally excited synchronous motor the company says is optimized for long distance driving at highway speeds. Unlike permanently excited synchronous motors widely used today, the externally excited synchronous motors do not require rare earth metals. Instead of a rotor with a permanent magnet made of rare earth metals used in permanently excited synchronous motors, the EESM uses a coil to generate magnetic fields in the stator and the rotor.
Integration saves weight and space, but the thermal management system is particularly efficient, the company says. That means more range and faster charging for electric cars. According toenergy consumption using the new integrated drive axle will be reduced by up to 14%. Part of that efficiency is due to better waste heat utilization and part due to a new CO2 heat pump. In addition, the new units cost about 10% less than current drive axles.
“The thermal management system has a significant influence on the efficiency and comfort of the vehicle,” says Jochen Schröder, head of electromobility at Schaeffler. With the 4-in-1 E-axle, “this creates a highly integrated and compact complete system, which requires significantly less space than non-integrated solutions.”
Cars are OK but there are no light weight and efficient batteries.
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