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    • 4. 发明授权
    • Rotation-angle detection device
    • 旋转角度检测装置
    • US09234738B2
    • 2016-01-12
    • US13879731
    • 2010-11-18
    • Takumi AsanoTakeshi MushaHiroshi NishizawaTakashi OkamuroNoriyasu Hasegawa
    • Takumi AsanoTakeshi MushaHiroshi NishizawaTakashi OkamuroNoriyasu Hasegawa
    • G01B7/30G01D5/14G01D5/245
    • G01B7/30G01D5/145G01D5/2451
    • A detection track includes a first detection element group that includes a plurality of first magnetic resistance elements arranged at a pitch λ/(2n) when an order to cancel target harmonic components among a plurality of harmonic components superimposed on a fundamental component of a detection signal for multi-pole magnetic pattern is assumed as n, and a second detection element group that includes a plurality of second magnetic resistance elements arranged at the pitch λ/(2n), a plurality of first dummy magnetic resistance elements arranged among the first magnetic resistance elements, and a plurality of second dummy magnetic resistance elements arranged among the second magnetic resistance elements. Pitches between adjacent magnetic resistance elements among the first magnetic resistance elements and the first dummy magnetic resistance element are equivalent to one another, and pitches between adjacent magnetic resistance elements among the second magnetic resistance elements and the second dummy magnetic resistance element are equivalent to one another.
    • 检测轨道包括:第一检测元件组,其包括以叠加在检测信号的基本分量上的多个谐波分量中的目标谐波分量取消的次序,以间距λ/(2n)排列的多个第一磁阻元件 假定为n极的多极磁性图案,以及包括以间距λ/(2n)排列的多个第二磁阻元件的第二检测元件组,设置在第一磁阻中的多个第一伪磁阻元件 元件和布置在第二磁阻元件之间的多个第二虚设磁阻元件。 第一磁阻元件和第一伪磁阻元件之间的相邻磁阻元件之间的间距彼此相等,第二磁阻元件和第二虚磁阻元件中的相邻磁阻元件之间的间距彼此相等 。
    • 5. 发明授权
    • Insulation deterioration diagnosis apparatus
    • 绝缘劣化诊断装置
    • US09030210B2
    • 2015-05-12
    • US13582758
    • 2011-04-04
    • Yoshimasa WatanabeYoshiharu KanedaHiroshi NishizawaToru Oka
    • Yoshimasa WatanabeYoshiharu KanedaHiroshi NishizawaToru Oka
    • H01H31/12G01R31/02G01R31/14H01H31/02G01R31/34G01R31/40
    • G01R31/025G01R31/14G01R31/34G01R31/40
    • The invention is related to an insulation deterioration diagnostic apparatus for an electric path connected between an inverter device and an inverter-driven load device, including: a zero-phase current transformer having an annular magnetic core, a magnetizing coil wound around the magnetic core, and a detecting coil wound around the magnetic core, the transformer being for detecting a zero-phase current of an electric path; a magnetization control circuit for supplying an alternating current having a frequency at least twice as high as a drive frequency of the load device to the magnetizing coil to magnetize the magnetic core; and a frequency extracting circuit for extracting a frequency component identical to the drive frequency fd, from the output signal of the detecting coil, whereby precisely measuring a current leaking from an inverter-driven load device over a wide range of frequencies.
    • 本发明涉及一种连接在逆变器装置和逆变器驱动的负载装置之间的电路的绝缘劣化诊断装置,包括:具有环形磁芯,缠绕在磁芯上的磁化线圈的零相电流互感器, 以及缠绕在所述磁芯上的检测线圈,所述变压器用于检测电路的零相电流; 磁化控制电路,用于将具有至少两倍于负载装置的驱动频率的频率的交流电提供给磁化线圈以磁化磁芯; 以及频率提取电路,用于从检测线圈的输出信号中提取与驱动频率fd相同的频率分量,从而精确地测量在宽频率范围内从逆变器驱动的负载装置泄漏的电流。
    • 8. 发明申请
    • MAGNETIC ROTATIONAL-ANGLE DETECTOR
    • 磁力旋转角度检测器
    • US20100052664A1
    • 2010-03-04
    • US12596729
    • 2008-04-17
    • Hiroshi NishizawaHajime NakajimaTakeshi MushaYoichi Ohmura
    • Hiroshi NishizawaHajime NakajimaTakeshi MushaYoichi Ohmura
    • G01B7/30
    • G01D5/2451
    • The present invention provides a magnetic rotational-angle detector capable of detecting a position and a rotational angle of a rotating member with excellent accuracy. The magnetic rotational-angle detector includes device arrays (51, 52) constituted by a plurality of magnetic sensor devices which are arranged to cancel the n-th order harmonic components by each other. In the device arrays, the magnetic sensor devices corresponding to each other are arranged such that they are spaced apart with a distance of (2m+1)λ, and the arrangement of all the magnetic sensor devices and their orientations with respect to a power-supply terminal and a ground terminal are axisymmetrical about a straight line (2b) passing through a barycenric position (59) of all the magnetic sensor devices which is positioned on a straight line along a radial direction of a rotating drum (1).
    • 本发明提供一种能够以高精度检测旋转部件的位置和旋转角度的磁旋转角度检测装置。 磁旋转角度检测器包括由多个磁传感器装置构成的装置阵列(51,52),其被布置为相互抵消n次谐波分量。 在器件阵列中,彼此对应的磁传感器装置被布置为使得它们以(2m + 1)λ的距离间隔开,并且所有磁传感器装置的布置及其相对于功率 - 供电端子和接地端子围绕通过沿着旋转鼓(1)的径向位于直线上的所有磁传感器装置的重心位置(59)的直线(2b)的轴对称。