| 摘要 |
<p>A method and a device for sensorless estimation of the relative position (θ) between the stator and the rotor of a three-phase synchronous motor during operation. Comprising the steps of low-pass filtering (1) of the terminal voltage, low-pass filtering (2) of the terminal current, high-pass filtering (3) of the terminal current and determining the rotor speed. Next the relative angular position (θ) is determined from the filtered magnitudes and corrected with an angular correction ( phi ) derived from the rotor speed ( omega ). <IMAGE></p> |
