| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric power steering device capable of providing a comfortable steering feeling, by inexpensively and stably improving conversion resolution (reducing a quantization error) in an A/D conversion circuit. <P>SOLUTION: To a microcomputer. a torque detecting value detected by a torque sensor is input via an A/D conversion circuit 31, and a motor current detecting value detected by a motor current detecting circuit is input via an A/D conversion circuit 32. THe A/D conversion circuits 31 and 32 have an analog filter for setting gain of a high frequency component of an analog signal in high gain to gain of a low frequency component before an A/D converter 52, and have a digital filter for setting gain of a high frequency component of a digital signal just after A/D conversion in low gain to gain of a low frequency component behind the AD converter 52. <P>COPYRIGHT: (C)2011,JPO&INPIT |
