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    • 1. 发明授权
    • Inverter control apparatus using a two-phase modulation method
    • 变频调速装置采用两相调制方式
    • US5650708A
    • 1997-07-22
    • US401988
    • 1995-03-10
    • Takeshi SawadaHiroshi FujitaHiroya TsujiKanji TakeuchiTsuneyuki Egami
    • Takeshi SawadaHiroshi FujitaHiroya TsujiKanji TakeuchiTsuneyuki Egami
    • B60L11/18H02M7/5387H02P7/00
    • B60L11/1803H02M7/53875Y02T10/7005
    • An inverter control apparatus for driving a polyphase AC motor for preventing abrupt changes in motor drive currents when switching of one phase is stopped. The apparatus includes a signal generator for generating duty signals of drive signals of respective phases on the basis of a generated reference waveform and a signal modifier for selecting one of the duty signals of one phase, holding it at a predetermined level, and modifying the duty signals of other phases according to the value required to hold the selected duty signal. On the basis of three-phase signal voltage levels, a decision is made on voltage fixing phase intervals by a phase decision circuit, and shift values are determined by an adder at every voltage fixing phase interval. Shift values are selected by a multiplexer according to the outputs of the phase decision circuit and added to triangular wave voltage. Resultant sum values are compared with the three-phase signal voltages to form a three-phase PWM signal.
    • 用于驱动多相交流电动机的逆变器控制装置,用于防止一相切换时电动机驱动电流的突然变化。 该装置包括:信号发生器,用于基于产生的参考波形产生各相的驱动信号的占空比信号;以及信号修正器,用于选择一个相位的占空比信号,将其保持在预定电平,并修改占空比 根据保持所选择的占空比信号所需的值的其他相位的信号。 基于三相信号电压电平,通过相位判定电路对电压固定相位间隔进行判定,并且在每个电压固定相间隔时由加法器确定偏移值。 移位值由多路复用器根据相位判定电路的输出选择,并加到三角波电压上。 将结果和值与三相信号电压进行比较,形成三相PWM信号。
    • 3. 发明授权
    • Electric power steering apparatus
    • 电动助力转向装置
    • US5828973A
    • 1998-10-27
    • US616632
    • 1996-03-15
    • Kanji TakeuchiTakeshi Sawada
    • Kanji TakeuchiTakeshi Sawada
    • B62D5/04B62D6/10
    • B62D5/0466
    • An electric power steering apparatus for recovering a steering wheel to its neutral position based on the speeds of the steered wheels of a vehicle. In response to a steering torque signal from a torque sensor, assisting torque by a motor is controlled in a torque servo system from a phase compensating filter to a current detecting unit. A microcomputer calculates a speed ratio of left and right wheels based on wheel speeds detected by wheel speed sensors. Recovery compensating torque is obtained from the speed ratio of the left and right wheels, and a corresponding signal is output to an addition calculating unit. The addition calculating unit adds the steering torque signal and the signal representing the recovery compensating torque to obtain a recovery compensated signal. Based on the recovery compensated signal, the assisting torque is controlled to recover the steering to its neutral position.
    • 一种用于基于车辆的转向轮的速度将方向盘恢复到其中立位置的电动助力转向装置。 响应于来自转矩传感器的转向转矩信号,由电动机的辅助转矩在相位补偿滤波器到电流检测单元的转矩伺服系统中被控制。 微型计算机基于由车轮速度传感器检测到的车轮速度来计算左右车轮的速比。 从左右车轮的速比获得恢复补偿扭矩,相应的信号输出到加法运算部。 相加计算单元将转向转矩信号和表示恢复补偿转矩的信号相加以获得恢复补偿信号。 基于恢复补偿信号,控制辅助扭矩以将转向恢复到其中立位置。
    • 4. 发明授权
    • Photomask manufacturing method, photomask manufacturing apparatus and photomask
    • 光掩模制造方法,光掩模制造装置和光掩模
    • US08101324B2
    • 2012-01-24
    • US12330734
    • 2008-12-09
    • Kanji Takeuchi
    • Kanji Takeuchi
    • G03F1/00
    • G03F1/36
    • A photomask manufacturing method which includes generating data of a main pattern to be transferred onto a substrate, and data of an assist pattern which is arranged adjacent to the main pattern and which assists the transfer of the main pattern without being transferred onto the substrate; performing an optical proximity effect correction to the generated data of the main pattern; correcting shapes of the main pattern and the assist pattern on the basis of a shape change caused at an edge of the main pattern facing the assist pattern by the optical proximity effect correction; and forming a photomask by using the data of the main pattern and of the assist pattern which have been corrected.
    • 一种光掩模制造方法,其包括生成要转印到基板上的主图案的数据,以及辅助图案的数据,该辅助图案布置在与主图案相邻并且有助于主图案的转印而不被转印到基板上; 对所述主图案的生成数据执行光学邻近效应校正; 基于通过光学邻近效应校正在与主动图案对置的主图案的边缘处的形状变化来校正主图案和辅助图案的形状; 以及通过使用已被校正的主图案和辅助图案的数据形成光掩模。
    • 5. 发明授权
    • Laser diode, optical pickup device, optical disk apparatus, and optical communications equipment
    • 激光二极管,光学拾取装置,光盘装置和光通信设备
    • US07580435B2
    • 2009-08-25
    • US11087797
    • 2005-03-23
    • Kanji TakeuchiKenji Sahara
    • Kanji TakeuchiKenji Sahara
    • H01S5/00
    • H01S5/2231H01S5/2004H01S2301/18
    • A laser diode capable of reducing a radiating angle θ⊥ in the vertical direction, an optical pickup device, an optical disk apparatus, and optical communications equipment, all equipped with the laser diode which increases optical coupling efficiency. It has a first cladding layer of the first conductive type formed on a substrate, with an active layer on top of the first cladding layer and a second cladding layer of the second conductive type on top of the active layer. In at least the first or second cladding layer, it is formed of at least one optical guide layer having a higher refractive index than the first or second cladding layer and operating to expand a beam waist in the waveguide. This operation contributes to widening a region in which to shut up light, enabling a radiating angle θ⊥ in the vertical direction to be reduced.
    • 能够减小垂直方向上的辐射角度θ⊥的激光二极管,光学拾取装置,光盘装置和光通信设备,其全都配备有提高光耦合效率的激光二极管。 它具有形成在基板上的第一导电类型的第一包覆层,在第一覆层的顶部具有有源层,在有源层顶部具有第二导电类型的第二覆层。 在至少第一或第二包覆层中,由至少一个具有比第一或第二覆层更高的折射率的光导层形成,并且在波导中扩展束腰。 该操作有助于加宽闭合光的区域,从而能够减小垂直方向的照射角度θ⊥。
    • 6. 发明授权
    • Control apparatus for brushless dc motors
    • 无刷直流电机控制装置
    • US4740734A
    • 1988-04-26
    • US93757
    • 1987-09-08
    • Kanji TakeuchiMasami Nagata
    • Kanji TakeuchiMasami Nagata
    • H02P6/08H02P6/18H02P6/02
    • H02P6/08
    • A control apparatus for a brushless dc motor comprises: a parallel connection circuit including a plurality of series circuits connected in parallel; each series circuit having one armature coil and one field-effect transistor, one end of the parallel connection circuit being connected to one end of a dc power source; a free-wheeling diode connected across the parallel connection circuit; first semiconductor switch means connected between the other end of the parallel connection circuit and the other end of the dc power source; a plurality of second semiconductor switch means connected between respective gates of the field-effect transistors; and the one end of the dc power source; a plurality of reverse current blocking elements for preventing reverse currents from flowing into the second semiconductor switch means from the gates of the field-effect transistors; a plurality of comparators for detecting induced voltages developed across the armature coils; a drive circuit responsive to detection output signals from the comparators for sequentially driving the second semiconductor switch means so that the field-effect transistors are turned on and off to sequentially control the energization of the armature coils; and a rotor comprising a permanent magnet having a plurality of magnetic poles which is driven by magnetic fields produced by the sequential energization of the armature coils.
    • 一种用于无刷直流电动机的控制装置,包括:并联连接的多个串联电路的并联电路, 每个串联电路具有一个电枢线圈和一个场效应晶体管,并联电路的一端连接到直流电源的一端; 跨并联连接电路连接的续流二极管; 连接在并联电路的另一端和直流电源的另一端之间的第一半导体开关装置; 连接在场效应晶体管的各个栅极之间的多个第二半导体开关装置; 和直流电源的一端; 多个反向电流阻挡元件,用于防止反向电流从场效应晶体管的栅极流入第二半导体开关装置; 用于检测跨越电枢线圈的感应电压的多个比较器; 响应于来自比较器的检测输出信号的驱动电路,用于顺序地驱动第二半导体开关装置,使得场效应晶体管导通和截止以顺序地控制电枢线圈的通电; 以及转子,其包括具有多个磁极的永磁体,所述多个磁极由所述电枢线圈的顺序通电产生的磁场驱动。
    • 8. 发明申请
    • Laser Diode, Optical Pickup Device, Optical Disk Apparatus, and Optical Communications Equipment
    • 激光二极管,光学拾取装置,光盘装置和光通信设备
    • US20090304037A1
    • 2009-12-10
    • US12533840
    • 2009-07-31
    • Kanji TakeuchiKenji Sahara
    • Kanji TakeuchiKenji Sahara
    • H01S5/00
    • H01S5/2231H01S5/2004H01S2301/18
    • A laser diode capable of reducing a radiating angle θ⊥ in the vertical direction, an optical pickup device, an optical disk apparatus, and optical communications equipment, all equipped with the laser diode which increases optical coupling efficiency. It has a first cladding layer of the first conductive type formed on a substrate, with an active layer on top of the first cladding layer and a second cladding layer of the second conductive type on top of the active layer. In at least the first or second cladding layer, it is formed of at least one optical guide layer having a higher refractive index than the first or second cladding layer and operating to expand a beam waist in the waveguide. This operation contributes to widening a region in which to shut up light, enabling a radiating angle θ⊥ in the vertical direction to be reduced.
    • 能够减小垂直方向上的辐射角度θ⊥的激光二极管,光学拾取装置,光盘装置和光通信设备,其全都配备有提高光耦合效率的激光二极管。 它具有形成在基板上的第一导电类型的第一包覆层,在第一覆层的顶部具有有源层,在有源层顶部具有第二导电类型的第二覆层。 在至少第一或第二包覆层中,由至少一个具有比第一或第二覆层更高的折射率的光导层形成,并且在波导中扩展束腰。 该操作有助于加宽闭合光的区域,从而能够减小垂直方向的照射角度θ⊥。
    • 10. 发明授权
    • Torque detection apparatus
    • 扭矩检测装置
    • US4881414A
    • 1989-11-21
    • US192187
    • 1988-05-10
    • Yousuke SetakaSumio YanaseKanji TakeuchiMasahiko Miyahara
    • Yousuke SetakaSumio YanaseKanji TakeuchiMasahiko Miyahara
    • B62D5/04B62D6/10G01L3/10G01L5/22
    • G01L5/221B62D6/10G01L3/104G01L3/105
    • A torque detection apparatus for measuring a torque applied between a drive shaft and an output shaft which is applicable to an electric power steering system of a motor vehicle. The torque detection apparatus is provided between the drive and output shafts and comprises first and second rotating bodies which are respectively at one end portions coupled fixedly to the drive and output shafts, the first rotating body being rotatable in accordance with rotation of the drive shaft and the second rotating body being rotatable in accordance with rotation of said output shaft. The first and second rotating bodies are shaped cylindrically and the first rotating body has on its outer circumferential surface magnetic toothed portions and the second rotating body has on its inner circumferential surface magnetic toothed portions. The first and second rotating bodies are disposed coaxially so that the magnetic toothed portions are magnetically engaged with each other so as to form a first magnetic flux path and a second magnetic flux path. The torque between the drive and output shafts is measured on the basis of the difference between the amounts of the magnetic fluxes passing through the first and second magnetic flux paths.
    • 一种扭矩检测装置,用于测量施加在可应用于机动车辆的电动助力转向系统的驱动轴和输出轴之间的转矩。 转矩检测装置设置在驱动和输出轴之间,并且包括分别在固定地连接到驱动和输出轴的一个端部处的第一和第二旋转体,第一旋转体可根据驱动轴的旋转而旋转, 所述第二旋转体可根据所述输出轴的旋转而旋转。 第一旋转体和第二旋转体成圆筒状,第一旋转体的外周面具有磁性齿部,第二旋转体在其内周面具有磁性齿部。 第一和第二旋转体同轴地设置,使得磁齿部彼此磁性地接合,以形成第一磁通路径和第二磁通路径。 基于通过第一和第二磁通路径的磁通量的差异来测量驱动和输出轴之间的扭矩。