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An approach of position sensorless control for permanent magnet synchronous motor （ PMSM ） is put forward based on a sliding mode observer. The mathematical model of PMSM in a stationary αβ reference frame is adopted, and the system is controlled by the digital signal processor （ DSP; TMS320LF2407 according to the control achieve closed loop operation of the motor, the stator theory of sliding mode observer. In order to magnetic field should be vertical with the rotor magnetic field and be synchronous with rotor rotating, so the position and speed of PMSM is estimated in real time and the estimated position is modified continuously. The simulation results indicate that the proposed observer has high precision is more robust to the parametric variation and load in estimation of PMSM position and speed, and torque disturbance. 相似文献
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Magnetic Field Analysis of Interior Composite-Rotor Controllable-Flux Permanent Magnet Synchronous Machine 总被引：1，自引：0，他引：1
* A conventional permanent magnet synchronousmachine (PMSM) is built to prevent demagnetizationeven under the extreme operatingconditions in the de-signing phase of rotor magnetic circuit and dimensionof permanent magnets (PMs). The magnet thicknessis large enough to keep the counter magnetic motiveforce (MMF) of armature less than coercive force inhigh temperatures[1]. If a conventional PMSMoperates in a wide speedrange, vector control strategy is always adopted. Bycontrollingd-axis dema… 相似文献
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