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    • 2. 发明申请
    • MOTOR CONTROLLING APPARATUS AND ELECTRIC POWER STEERING APPARATUS USING THE SAME
    • 电机控制装置和电动转向装置
    • US20130271047A1
    • 2013-10-17
    • US13202430
    • 2011-07-26
    • Yousuke ImamuraMasahiro MaedaKenichi Shimada
    • Yousuke ImamuraMasahiro MaedaKenichi Shimada
    • H02P6/00
    • H02P6/002B62D5/046H02P6/28H02P23/03H02P23/04
    • [Problem]An object of the present invention is to provide a motor controlling apparatus that comprises a single current sensor and obtains a maximal duty range that current becomes detectable with realizing size reduction, weight saving and cost reduction and an electric power steering apparatus using the same.[Means for solving the problem]A motor controlling apparatus that calculates each phase duty command value for controlling a motor current by means of control calculation, forms PWM waveforms corresponding to each phase duty command value and drives the motor based on the PWM waveforms by an inverter, comprising: a duty shift function that uniformly either increases or decreases each phase duty command value with keeping differences in each phase duty command value; and a PWM output position changing function that decides output positions of each phase PWM signal, and wherein a single current detector is connected to power supply input side or power supply output side of the inverter, timing that a PWM signal of only one phase becomes ON state or PWM signals of two phases become ON state simultaneously is generated at fixed positions of PWM periods, and the motor current is detected.
    • 发明内容本发明的目的是提供一种电动机控制装置,其包括单个电流传感器,并且在实现尺寸减小,重量减轻和成本降低的情况下获得电流变得可检测的最大占空比范围,以及使用 相同。 解决问题的手段通过控制计算来计算用于控制电动机电流的各相负载指令值的电动机控制装置形成与各相占空比指令值对应的PWM波形,并根据PWM波形驱动电动机 逆变器,包括:占空比函数,其均匀地增加或减少每个相位占空指令值,同时保持每个相位占空指令值的差异; 以及PWM输出位置变更功能,其决定各相PWM信号的输出位置,其中,单个电流检测器与逆变器的电源输入侧或电源输出侧连接,只有一相的PWM信号为ON 在PWM周期的固定位置产生两相状态或PWM信号同时变为导通状态,并检测电动机电流。
    • 5. 发明授权
    • Optical pickup and optical disc drive
    • 光学拾取和光盘驱动器
    • US07656771B2
    • 2010-02-02
    • US11508628
    • 2006-08-22
    • Kenichi ShimadaKunikazu OhnishiNobuhiro Konuma
    • Kenichi ShimadaKunikazu OhnishiNobuhiro Konuma
    • G11B7/00
    • G11B7/1367G11B7/0903G11B2007/0006G11B2007/0013
    • An optical pickup for writing information to and/or for reading information from an optical disc having at least two recording layers (dual layer) provided with first and second recording layers can prevent layer crosstalk resulting from disturbing a signal reproduced from the first recording layer by a reflected light beam reflected from the second recording layer during a writing operation for writing information to the first recording layer or a reading operation for reading information from the fist recording layer. An orthogonal polarization region forming component forms an orthogonal polarization region, in which respective directions of polarization of a first light beam focused on and reflected by a first recording layer of an optical disc and a second light beam reflected by a second recording layer of the optical disc are perpendicular to each other, in a region, in which the first and the second light beam overlap each other, on a light-receiving surface of a detector. The orthogonal polarization region forming component is a polarization switch for changing the directions of polarization of part or all of the first and the second light beam.
    • 用于向具有第一和第二记录层的至少两个记录层(双层)的光盘写入信息和/或从其读取信息的光学拾取器可以防止由于干扰由第一记录层再现的信号而引起的层串扰 在用于将信息写入第一记录层的写入操作期间从第二记录层反射的反射光束或用于从第一记录层读取信息的读取操作。 正交偏振区域形成部件形成正交偏振区域,其中聚焦在光盘的第一记录层上的第一光束的偏振方向和由光学器件的第二记录层反射的第二光束 在第一和第二光束彼此重叠的区域中,光盘在检测器的光接收表面上彼此垂直。 正交偏振区域形成部件是用于改变第一和第二光束的部分或全部的偏振方向的偏振开关。
    • 6. 发明授权
    • Multilayer printed wiring board with filled viahole structure
    • 多层印刷线路板,带有通孔结构
    • US07622183B2
    • 2009-11-24
    • US11385904
    • 2006-03-22
    • Seiji ShiraiKenichi ShimadaMotoo Asai
    • Seiji ShiraiKenichi ShimadaMotoo Asai
    • B32B3/00
    • H05K3/4661H05K3/108H05K3/381H05K3/382H05K3/421H05K3/423H05K2201/0129H05K2201/015H05K2201/0278H05K2201/09563H05K2201/096H05K2201/09745Y10T428/24273Y10T428/24322Y10T428/24917Y10T428/31681
    • The present invention provides a multilayer printed wiring board having a filled viahole structure advantageously usable for forming a fine circuit pattern thereon, and having an excellent resistance against cracking under a thermal shock or due to heat cycle. The multilayer printed wiring board is comprised of conductor circuitry layers and interlaminar insulative resin layers deposited alternately one on another, the interlaminar insulative resin layers each having formed through them holes each filled with a plating layer to form a viahole. The surface of the plating layer exposed out of the hole for the viahole is formed substantially flat and lies at a substantially same level as the surface of the conductor circuit disposed in the interlaminar insulative resin layer. The thickness of the conductor circuitry layer is less than a half of the viahole diameter and less than 25 μm. The inner wall of the hole formed in the interlaminar insulative resin layer is roughened and an electroless plating layer is deposited on the roughened surface. An electroplating layer is filled in the hole including the electroless plating layer to form the viahole. The interlaminar insulative resin layer is formed from a composite of a fluororesin showing a high fracture toughness and a heat-resistant thermoplastic resin, a composite of fluororesin and thermosetting resin or a composite of thermosetting and thermoplastic resins.
    • 本发明提供了一种多层印刷线路板,其具有有利地用于在其上形成精细电路图案的填充通孔结构,并且在热冲击下或由于热循环具有优异的抗开裂性。 多层印刷布线板由交替地彼此堆叠的导体电路层和层间绝缘树脂层构成,层间绝缘树脂层各自形成有各自填充有镀层的孔,以形成通孔。 露出用于通孔的孔的镀层的表面形成为基本上平坦,并且位于与布置在层间绝缘树脂层中的导体电路的表面基本相同的水平。 导体电路层的厚度小于通孔直径的一半,小于25μm。 形成在层间绝缘树脂层中的孔的内壁变粗糙,并且在粗糙化表面上沉积化学镀层。 在包括无电镀层的孔中填充电镀层以形成通孔。 层间绝缘树脂层由显示高断裂韧性的氟树脂和耐热性热塑性树脂,氟树脂和热固性树脂的复合物或热固性和热塑性树脂的复合材料的复合材料形成。