| 摘要 |
PROBLEM TO BE SOLVED: To provide a torque detector that suppresses a fluctuation of an output value relative to an input value, and that also has the output value accurately follow the input value when the input value changes suddenly, and an electric power steering controller provided with the torque detector. SOLUTION: The electric power steering controller is provided with the torque detector, a motor 6 which assists a steering torque, and a motor drive 35 which finds a motor torque corresponding to the steering torque, and controls the motor 6. The torque detector is provided with a torque sensor 4, an A/D converter 18a, and a filter 31. The torque sensor 4 outputs a signal corresponding to the steering torque applied to a steering shaft, when the steering shaft is rotated. The A/D converter 18a converts the signal from an analog value to a digital value and outputs it. The filter 31 performs hysteresis processing on data inputted from the A/D converter 18a, forms data processed within a maximum hysteresis error range on the basis of the data, and outputs the data as an output value. COPYRIGHT: (C)2004,JPO |
