| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress complication of a device configuration and an increase in an operation load, and to prevent a calculation result of a magnetic pole position from varying. <P>SOLUTION: An estimation device of a magnetic pole position of a motor includes a motor model current operation unit 61 for calculating a model current according to a voltage equation of a prescribed model of a motor and calculating a current difference between the model current and an actual current, a high-speed area magnetic pole position error operation unit 65 and a low-speed area pole position error operation unit 66 for calculating a magnetic pole position difference between an actual magnetic pole position of the motor and a magnetic pole position by estimation or designation based on the current difference according to whether a rotational speed of the motor is less than a prescribed value by mutually different operations, and a rotational speed-magnetic pole position operation unit 49 for calculating a magnetic pole position of the motor based on the magnetic pole position difference calculated by the high-speed area magnetic pole position error operation unit 65 and the low-speed area pole position error operation unit 66. <P>COPYRIGHT: (C)2011,JPO&INPIT |
