control of electric machines involving calculating a square root
    2.
    发明公开
    control of electric machines involving calculating a square root 审中-公开
    Steuerung von elektrischen Maschinen wobei eine Quadratwurzel berechnet wird

    公开(公告)号:EP2341425A1

    公开(公告)日:2011-07-06

    申请号:EP09368054.4

    申请日:2009-12-30

    CPC classification number: G06F7/5525

    Abstract: One aim of the present invention is to provide a new method, and related system, to implement the square root extraction operation, which grants a 32 bits precision, which has high execution speed and is able to process a decimal radicand. An aspect of the present invention relates to a method for controlling an electric machine (110), comprising the detection of the value of at least one electrical quantity (I1, V1, I2, V2, I3, V3) characterizing the machine operation and processing the detected value of said electrical quantity. The control method controls the machine operation on the basis of this processing. In particular the processing of the detected value of the electrical quantity comprises calculating (125) a square root (205) of a radicand value (210) related to the detected value of electrical quantities. The calculation of the square root includes: calculating (220, 225) an approximated value (215, 230) of the square root, having a first precision, and then calculating (200; 300) a corrective value (293; 397) and combining (235) said approximated value with said corrective value to obtain a square root value having a second precision greater than the first precision.

    Abstract translation: 本发明的一个目的是提供一种实现平方根提取操作的新方法和相关系统,其提供32位精度,其具有高执行速度并且能够处理十进制数。 本发明的一个方面涉及一种用于控制电机(110)的方法,包括检测表征机器操作和处理的至少一个电量(I1,V1,I2,V2,I3,V3)的值 所述电量的检测值。 该控制方法在此处理的基础上控制机器运行。 特别地,对电量检测值的处理包括计算(125)与检测到的电量相关的根数值(210)的平方根(205)。 平方根的计算包括:计算(220,225)平方根的近似值(215,230),具有第一精度,然后计算(200; 300)校正值(293; 397)并组合 (235)所述具有所述校正值的近似值以获得具有大于第一精度的第二精度的平方根值。

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