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Characteristics of a magnetostrictive torque sensor were studied in the excitation current range 10~1000 mA and at excitation frequencies from 1 kHz to 100 kHz. Ni-Cr-Mo steel (JIS standard SNCM439) ferromagnetic material was used in an experimental shaft because of its high mechanical strength under applied torques ranging - 1500~1500 Nm. As the excitation current was increased, the sensor sensitivity...
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