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Estimation of Angular Speed and Park Matrix from Resolver Position Sensor Signals without Using Trigonometric Functions

机译:不使用三角函数从旋转变压器位置传感器信号估计角速度和停车矩阵

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Resolver is an angular position sensor widely used in electric/hybrid vehicles and robotics. However, estimating the angular position and speed from resolver outputs is as difficult task. Most algorithms in literature use trigonometric functions to estimate the angular position. However, these functions are difficult to implement, especially in FPGAs. On the other hand, in speed vector control of three-phase motors, the angular position is only used to estimate the mechanical speed and Park transformation matrix. This paper presents a simple technique to get the mechanical speed and Park matrix without calculating trigonometric functions and without estimating directly the angular position. Filtering and synchronous demodulation allows obtaining the sine and cosine of the angular position, while the compensation of the delay produced by filtering and the estimation of the Park matrix are done using simple trigonometric properties and taking advantage that the number of pole pairs is an integer number. Experimental results show the accuracy of the proposed approach.
机译:旋转变压器是一种角度位置传感器,广泛用于电动/混合动力车辆和机器人技术。但是,从分解器输出估算角位置和速度是一项艰巨的任务。文献中的大多数算法都使用三角函数来估计角位置。但是,这些功能很难实现,尤其是在FPGA中。另一方面,在三相电动机的速度矢量控制中,角位置仅用于估计机械速度和Park变换矩阵。本文提出了一种简单的技术,可在不计算三角函数且不直接估计角位置的情况下获得机械速度和Park矩阵。滤波和同步解调允许获得角位置的正弦和余弦,而滤波产生的延迟的补偿和Park矩阵的估计是使用简单的三角函数并利用极对数为整数来完成的。实验结果表明了该方法的准确性。

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