大陆集团发布新传感器技术 可直接测量永磁同步电机转子温度

Core Insights - Continental Group has successfully developed a new sensor technology that allows for direct measurement of the rotor temperature in electric vehicle permanent magnet synchronous motors, significantly improving measurement accuracy from a tolerance range of 15°C to just 3°C [1][3]. Group 1: Technology Development - The new rotor temperature sensor (eRTS) enhances measurement precision, which is crucial as the rotor can operate at extreme temperatures up to 150°C [3]. - Previously, rotor temperature was estimated based on data from stator temperature sensors, phase current measurements, and environmental variables, leading to a high tolerance range [3]. Group 2: Impact on Manufacturing - With the improved measurement accuracy, automotive manufacturers gain greater design flexibility for permanent magnet synchronous motors, allowing for a significant reduction in the use of expensive rare earth materials needed for thermal safety [3]. - The precise control over a narrower temperature tolerance range can enhance motor performance [3]. Group 3: Sensor Components - The eRTS consists of two independent components: a temperature sensing unit and a transducer unit [5]. - The temperature sensing unit is installed directly in the target area for accurate measurement, while the transducer unit, located externally, transmits temperature data via a dedicated communication interface [5]. - The technology employs piezo ultrasound for bidirectional wireless communication, enabling energy transfer and data transmission simultaneously [5]. Group 4: Strategic Direction - Continental Group's global head of passive safety and sensor division emphasized that the eRTS sensor technology reduces rare earth resource consumption and costs, outperforming existing solutions [5]. - The company plans to continue expanding its electric vehicle sensor product portfolio, reflecting its commitment to research and development in this area [5].