| 摘要 |
A microcomputer (11) includes a rotation angular velocity computation section (35), a feedback gain determination section (36), and a dead time compensation amount determination section (40). The rotation angular velocity determination section computes the rotation angular velocity (É) of a brushless motor (2). Based on the rotation angular velocity, the feedback gain determination section determines feedback gains (Kdp,Kdi,Kqp,Kqi). The dead time compensation amount determination section determines a dead time compensation amount (²x). The greater the absolute value of the rotation angular velocity, that is, the higher the rotation speed of the brushless motor, the greater the feedback gains determined by the feedback gain determination section become, and the higher the responsivity of the feedback gains becomes. The greater the absolute value of the rotation angular velocity, the smaller the dead time compensation amount determined by the dead time compensation amount determination section becomes. |
