| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an electrically-driven power steering device capable of accurately determining electric conduction/cutoff of a power supply relay, even when voltage of a battery varies to low voltage.SOLUTION: When a voltage of a motor drive circuit side terminal of the power supply relay 12 detected by a terminal voltage detection circuit 17 is lower than a predetermined value set lower than a battery voltage in engine cranking, a power supply stabilizing capacitor 14 is charged up to at least the predetermined value by a precharge circuit 15, then, the electric conduction/cutoff of the power supply relay 12 is determined by electric conduction/cutoff determination means based on the voltage of the motor drive circuit side terminal of the power supply relay 12 detected by the terminal voltage detection circuit 17 when driving the power supply relay 12 in an electric conduction state.</p> |
