Continental has launched an modern sensor know-how designed to precisely measure the temperature inside completely excited synchronous motors in electrical automobiles (EVs) immediately on the rotor. The corporate states that its e-Motor Rotor Temperature Sensor (eRTS) supplies considerably extra exact measurement outcomes in comparison with the prevailing software-based temperature simulation. This development may permit car producers to lower their reliance on uncommon earth parts used to reinforce the warmth resistance of magnets.
The eRTS consists of two essential elements: a wi-fi mote temperature sensor unit positioned close to the magnet throughout the EV motor, and a wired transducer aspect positioned exterior the motor, which connects to the inverter management.
Rotors endure excessive circumstances, with temperatures generally reaching as much as 150° C. Due to this fact, it’s important to watch and handle temperature variations in EV motors. Presently, temperature growth just isn’t measured immediately however is as an alternative calculated utilizing information from the stator temperature sensor, part present measurements, and different environmental elements. This oblique technique has a tolerance vary of as much as 15° C. To stop demagnetization attributable to excessive temperatures, pricey uncommon earth parts are employed throughout the tolerance spectrum to make sure the magnets stay heat-resistant. The brand new eRTS know-how reduces this tolerance vary to simply 3° C, permitting producers to considerably reduce down on the usage of costly uncommon earth supplies or improve motor efficiency by pushing the boundaries of the tolerance vary.
Christoph Busch, head of Continental’s Product Heart, remarked, “Our E-Mobility Sensors product heart goals to extend effectivity and sustainability in electrical automobiles. The eRTS know-how exemplifies this aim: decreasing the usage of uncommon earths contributes to a extra sustainable provide chain. When mixed with different sensor applied sciences, just like the e-Motor Rotor Place Sensor, it will probably function a complete resolution to create synergies that save automotive producers each money and time.”
Supply: Continental
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