| 摘要 |
A rotation angle estimation module of a permanent magnetic synchronous motor (PMSM) for sensorless vector control of the PMSM is provided. The rotation angle estimation module includes: a fixed flux instruction estimation unit calculating a rotating flux (» sd , » sq ) and a fixed flux instruction (» s± *, » s² *) based on a rotation angle ¸ and the current (I s± , I s² ) of a fixed coordinate system; a fixed flux estimation unit calculating a fixed flux (» s± , » s² ) based on the voltage (V s± , V s² ) of the fixed coordinate system, and the current (I s± , I s² ) and fixed flux error (” s± , ” s² ) of the fixed coordinate system; a fixed flux error estimation unit using the difference between the fixed flux instruction (» s± *, » s² *) and the fixed flux (» s± , » s² ) to calculate the fixed flux error (” s± , ” s² ) and feed the errors back to the fixed flux estimation unit; and a trigonometric function calculation unit calculating the rotation angle ¸, a distance that a rotor moves, based on the rotating flux (» sd , » sq ) and the fixed flux (» s± , » s² ). |
