| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric power steering device capable of accurately calculating a resistance value of a motor for imparting an assist force to a steering system. <P>SOLUTION: The electric power steering device calculates an estimated induced voltage EXa by a disturbance observer based on an electric current value Im and a voltage value Vm, and also calculates the resistance value based on the electric current value Im and the voltage value Vm when the estimated induced voltage EXa falls within a predetermined range, and further corrects an arithmetic operation expression of the disturbance observer based on the voltage value Vm (the past voltage value) acquired before the last acquired voltage value Vm and the electric current value Im (the past electric current value) acquired before the last acquired electric current value Im. <P>COPYRIGHT: (C)2013,JPO&INPIT |
