| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital rotor phase velocity estimation device used in a drive controller for AC motor, and capable of estimating the phase and velocity of a rotor in a velocity region including zero, while achieving quick response and light operation load.SOLUTION: A digital rotor phase velocity estimation device 10 includes high frequency voltage application means 10-1 for applying a rectangular high frequency voltage on the base shaft of a quasi-synchronization coordinate system, positive correlation signal generation means 10-2 for generating a positive correlation signal by using a discrete time detection value of stator current and the polarity information of a high frequency voltage, and rotor phase velocity estimation means 10-3 for generating the base shaft phase of the quasi-synchronization coordinate system, and the estimates of the phase and velocity of the rotor by performing signal processing of the positive correlation signal. |
