Continental has developed a brand new sensor expertise that measures the temperature inside completely excited synchronous motors in EVs instantly on the rotor. The corporate says its e-Motor Rotor Temperature Sensor (eRTS) delivers considerably extra exact measurement outcomes than the present software-based temperature simulation. This could allow automobile producers to scale back the quantity of uncommon earth parts used to extend the magnets’ warmth resistance.
eRTS incorporates two separate parts: a wi-fi mote temperature sensor unit positioned near the magnet within the EV motor; and a wired transducer ingredient positioned exterior the EV motor. It’s linked to the inverter management.
Rotors function below excessive situations—typically at temperatures of as much as 150° C—so monitoring and controlling temperature improvement in EV motors is essential. At the moment, warmth improvement is just not measured instantly, however calculated primarily based on info from the stator temperature sensor, part present measurements and environmental variables. This measurement technique has with a tolerance vary of as much as 15° C. To guard the magnet from demagnetization as a consequence of extreme temperature, costly uncommon earth parts are used to cowl all the tolerance vary and make sure the magnet is heat-resistant. The brand new eRTS sensor expertise permits the tolerance vary to be diminished to three° C. Because of this automobile producers might considerably cut back their utilization of expensive uncommon earth supplies—or alternatively, enhance motor efficiency by pushing the boundaries of the tolerance vary.
“Our E-Mobility Sensors product middle goals to extend effectivity and sustainability in electrical automobiles,” says Christoph Busch, head of Continental’s Product Heart. “The eRTS expertise is an efficient instance of this: decreasing using uncommon earths contributes to a extra sustainable provide chain. Together with different sensor applied sciences, such because the e-Motor Rotor Place Sensor, it might probably even act as a system resolution to create synergies that may save automobile producers cash and energy.”
Supply: Continental
