Abstract
This paper shows the high potential of magnetostrictive Torque Sensor applied in electric vehicles (EVs). Although most of the current EVs are equipped with fixed-ratio gearboxes, the demand for 2-speed transmission will be increased in the near future for improving cruising range and driving performance. The torque feedback control of clutches and an e-motor with Torque Sensor can realize seamless shifting even with large gear step ratio which causes uncomfortable shifting shock. In order to evaluate the advantages of Torque Sensor applied in 2-speed EV, preliminary evaluation in the powertrain system of an ICE vehicle was conducted. Moreover, seamless 2-speed eAxle concept is proposed for long cruising range and comfortable ride.
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