| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric power steering device capable of reducing load applied to a steering system in the end-abutment state. <P>SOLUTION: In the electric power steering device 11, an end-abutment determination part 53 determines whether or not it becomes in the end-abutment state, and when it becomes in the end-abutment state, a q axis current instruction value Iq1* for giving it to a drive control part 42 for producing motor drive currents Iu, Iv, Iw is held to a value of a q axis current detection value Iq2 immediately before determined as the end-abutment state. Thereby, assistance force by a motor 12 can be suppressed to the size required to the lowest limit relative to steering resistance Tf in the end-abutment state, and the load applied to the steering system can be reduced as compared with conventional. <P>COPYRIGHT: (C)2008,JPO&INPIT |
