论文部分内容阅读
针对兆瓦级永磁同步直驱系统中电机的特点,采用一种基于状态观测器和锁相环模型相结合的无速度传感器控制技术。该技术通过电机数学模型,建立定子电流的状态方程,并构建基于定子电流状态方程的观测器模型;运用锁相环原理,在假定旋转坐标系下对观测器模型的输出建立速度和位置估计的闭环控制器。采用此技术构建了应用于直驱系统的永磁同步电机矢量控制方案。通过仿真验证了所述方案的可行性,并通过实验室样机平台,验证其在全速范围内位置和转速估计的正确性。
Aiming at the characteristics of motor in megawatt PM synchronous direct-drive system, a speed sensorless control technique based on state observer and phase-locked loop model is adopted. Based on the mathematical model of the motor, the state equation of the stator current is established, and the observer model based on the stator current equation of state is constructed. By using the principle of phase-locked loop, the velocity and position estimation of the output of the observer model under the assumption of rotating coordinate system Closed-loop controller. Using this technology, a permanent magnet synchronous motor vector control scheme is proposed. The feasibility of the proposed scheme was verified through simulation. The correctness of the position and speed estimation in the full speed range was verified by the laboratory prototype platform.