| 摘要 |
<p>PURPOSE:To make compensation of a system by furnishing an OP amp. buffer at the output part of a torque sensor, lowering the output impedance, raising the anti-noise property, and by providing a reed lug filter of non-inversion type at the input part of a controller. CONSTITUTION:At the interface between a controller 17 and a torque sensor 12 in motor-driven power steering, a torque signal given by a torque signal generator part 1 is first converted into voltage source with low output impedance by an OP amp. buffer 2. Then the torque signal is fed to a reed lug filter 3 of non-inversion type with high input impedance through a harness, and then it is converted into digital signal by an A/D converter 4 to be fed to a microcomputer 5. This lowers the output impedance of torque sensor 1 and enhances the anti-noise property, and further the torque sensor circuit is simplified to accomplish constructing it in a small size and at low cost.</p> |
