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公开(公告)号：US20120095712A1
公开(公告)日：2012-04-19
申请号：US13187942
申请日：2011-07-21
摘要： An angle detection unit including first to third arithmetic units receives first and second signals that are associated with intensities of components of a rotating magnetic field in mutually different directions. The first arithmetic unit generates a sum of squares signal made up of the sum of squares of the first and second signals. Based on the sum of squares signal, the second arithmetic unit calculates a first error component estimate which is an estimated value of a first error component included in the first signal and a second error component estimate which is an estimated value of a second error component included in the second signal. The third arithmetic unit generates a first corrected signal by subtracting the first error component estimate from the first signal, generates a second corrected signal by subtracting the second error component estimate from the second signal, and calculates a detected angle value based on the first and second corrected signals.
摘要翻译： 包括第一至第三运算单元的角度检测单元接收与相互不同方向的旋转磁场的分量的强度相关联的第一和第二信号。 第一算术单元产生由第一和第二信号的平方和组成的平方和信号。 基于平方和信号，第二算术单元计算第一误差分量估计，其是包括在第一信号中的第一误差分量的估计值和作为包括的第二误差分量的估计值的第二误差分量估计 在第二个信号。 第三算术单元通过从第一信号中减去第一误差分量估计来产生第一校正信号，通过从第二信号中减去第二误差分量估计来产生第二校正信号，并且基于第一和第二运算单元计算检测角度值 校正信号。
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公开(公告)号：US20120053865A1
公开(公告)日：2012-03-01
申请号：US13176485
申请日：2011-07-05
CPC分类号： G01R33/093 , B82Y25/00 , G01D5/145
摘要： A first detection unit has first and second detection circuits. A second detection unit has third and fourth detection circuits. Output signals of the second and fourth detection circuits differ from output signals of the first and third detection circuits in phase, respectively, by an odd number of times ¼ the signal period. The output signal of the third detection circuit differs from the output signal of the first detection circuit in phase by an integer multiple of ⅙ the signal period other than an integer multiple of ½ the signal period. A rotating field sensor generates a first signal based on the output signals of the first and third detection circuits, generates a second signal based on the output signals of the second and fourth detection circuits, and calculates a detected angle value based on the first and second signals.
摘要翻译： 第一检测单元具有第一和第二检测电路。 第二检测单元具有第三和第四检测电路。 第二和第四检测电路的输出信号分别与第一和第三检测电路的输出信号分别相差奇数倍的信号周期。 第三检测电路的输出信号与第一检测电路的输出信号相位不同于信号周期的整数倍，除了信号周期的1/2的整数倍。 旋转场传感器基于第一和第三检测电路的输出信号产生第一信号，基于第二和第四检测电路的输出信号产生第二信号，并基于第一和第二检测电路计算检测角度值 信号。
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公开(公告)号：US20120119729A1
公开(公告)日：2012-05-17
申请号：US13205209
申请日：2011-08-08
IPC分类号： G01B7/30
CPC分类号： G01R33/093 , B82Y25/00 , G01D5/145
摘要： A rotating field sensor includes a first detection circuit that outputs a first signal indicating the intensity of a component of a rotating magnetic field in a first direction, a second detection circuit that outputs a second signal indicating the intensity of a component of the rotating magnetic field in a second direction, and an arithmetic circuit that calculates a detected angle value based on the first and second signals. Each of the first and second detection circuits includes at least one MR element row. Each MR element row is composed of a plurality of MR elements connected in series. Each MR element has a magnetization pinned layer. The plurality of MR elements forming each MR element row include one or more pairs of MR elements. Magnetization directions of the magnetization pinned layers in two MR elements making up a pair form a predetermined relative angle other than 0° and 180°.
摘要翻译： 旋转场传感器包括：第一检测电路，其输出表示第一方向上的旋转磁场的分量的强度的第一信号;第二检测电路，输出表示旋转磁场的分量的强度的第二信号 以及运算电路，其基于第一和第二信号计算检测角度值。 第一和第二检测电路中的每一个包括至少一个MR元件行。 每个MR元件行由串联连接的多个MR元件组成。 每个MR元件具有磁化固定层。 形成每个MR元件行的多个MR元件包括一对或多对MR元件。 构成一对的两个MR元件中的磁化钉扎层的磁化方向形成除了0°和180°之外的预定相对角度。
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