| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a permanent magnet field synchronous motor controller which minimizes the response delay of estimated angular speed and estimated position by preventing the deterioration of estimation accuracy due to the change of a constant of induced voltage. <P>SOLUTION: This permanent magnet synchronous motor controller, which is equipped with a δ-axis current controller (802), a γ-axis current controller (803), a vector controller (804), an inverter (805), a coordinate converter (807), and a γ-δ-axis current/induced voltage estimator (808), is equipped with an angular speed deriver (809) which computes estimated angular speed, using the first estimated angular speed being obtained by dividing the above δ-axis estimated induced voltage by the induced voltage constant of the synchronous motor and the second estimated angular speed being obtained by zeroing the phase error being obtained by dividing the multiplied value of the above γ-axis estimated induced voltage and the above δ-axis estimated induced voltage by the square root of sum of squares of the above γ-axis estimated induced voltage and the above δ-axis estimated induced voltage, and a position estimator (810) which generates the above γ-δ-axis estimated position by integrating the above estimated angular speed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
