| 摘要 |
<p>An electric power steering system comprising a power unit (10) consisting essentially of drive circuits for an electric motor and the like, and a control unit (20) separate from the power unit and constisting essentially of a control circuit for controlling the drive circuits. The control unit is connected to each of the drive circuits of the power unit by a transmission line (L) for the control unit to transmit therethrough "ON" or "OFF" representing logical control signals to the drive circuit to thereby control the drive circuit. The power steering system has first signal conversion means (22) provided in the control unit for converting an "ON" representing logical control signal (a) to a pulse signal (c), and second signal conversion means (14) provided in the power unit and connected to the first signal conversion means by said transmission line for producing an "ON" logical control signal when the input signal (c) is the pulse signal or for producing an "OFF" logical control signal when the input signal is not the pulse signal.</p> |
