| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller for a permanent-magnet synchronous motor, which enables a presice estimation of the speed and magnetic pole position of a motor regardless of the speed range of the motor. <P>SOLUTION: The controller for the permanent-magnet synchronous motor without a magnetic pole position detector includes: a magnetic flux observer 21 which computes a current estimated value of the motor 1 from the current detected value, a voltage command value, a magnetic flux estimated value and a speed estimated value of the motor 1 and computes a magnetic flux estimated value by amplifying the deviation between the current estimated value and the current detected value; an angle error computing unit 22 for computing the angle between γ, δ axes and the magnetic flux estimated value; a speed estimating unit 23 for computing the speed estimated value by amplifying the computed angle; and a magnetic pole position computing unit 24 for computing the magnetic position of a rotor by amplifying the speed estimated value. <P>COPYRIGHT: (C)2010,JPO&INPIT |
