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    • 59. 发明授权
    • Combined externally pressurized gas-magnetic bearing assembly and spindle device utilizing the same
    • 组合外加压气磁轴承组件和利用其的主轴装置
    • US06288465B1
    • 2001-09-11
    • US09066820
    • 1998-04-28
    • Nobuyuki SuzukiHiroyuki Yamada
    • Nobuyuki SuzukiHiroyuki Yamada
    • H02K709
    • F16C32/0603F16C32/00F16C32/0402F16C32/0444F16C32/047F16C32/06Y10T409/309352
    • A combined externally pressurized gas and magnetic bearing assembly (3) includes an externally pressurized gas bearing (9) and a magnetic bearing (8) that are integrated together so as to have component parts common to both of the externally pressurized gas bearing (9) and the magnetic bearing (8). The externally pressurized gas bearing (9) or the magnetic bearing (8) may be disposed within an axial extent of the magnetic bearing (8) or the externally pressurized gas bearing (9), respectively. A spindle device (1) utilizing the combined externally pressurized gas and magnetic bearing assembly (3) is also provided which includes a housing (2) for supporting a main shaft (4) rotatably through the combined externally pressurized gas and magnetic bearing assembly (3). This combined externally pressurized gas and magnetic bearing assembly (3) can be applied not only to the radial bearing, but also to the axial bearing.
    • 组合的外部加压气体和磁性轴承组件(3)包括外部加压的气体轴承(9)和磁性轴承(8),所述外部加压气体轴承(9)和磁性轴承(8)被集成在一起,以具有与外部加压气体轴承(9)共同的部件, 和磁轴承(8)。 外部加压气体轴承(9)或磁性轴承(8)可以分别设置在磁性轴承(8)或外部加压气体轴承(9)的轴向范围内。 还提供了利用组合的外部加压气体和磁性轴承组件(3)的主轴装置(1),其包括用于通过组合的外部加压气体和磁性轴承组件(3)可旋转地支撑主轴(4)的壳体(2) )。 这种组合的外部加压气体和磁性轴承组件(3)不仅可以应用于径向轴承,而且可以应用于轴向轴承。
    • 60. 发明授权
    • Control apparatus for electric vehicle
    • 电动车控制装置
    • US06255798B1
    • 2001-07-03
    • US08736346
    • 1996-10-23
    • Sanshiro ObaraRyoso MasakiYuusuke TakamotoEiichi OhtsuHiroyuki Yamada
    • Sanshiro ObaraRyoso MasakiYuusuke TakamotoEiichi OhtsuHiroyuki Yamada
    • H02D534
    • B60L11/1803B60L15/025H02P21/00Y02T10/643Y02T10/7005Y02T10/7258
    • A more compact and light-weight drive unit is required for an electric vehicle in order to improve its mileage per charge, acceleration performance and overall efficiency. A control apparatus which generates drive signals to drive power devices in the power converter includes: a current reference generator calculates from a torque reference value a d-axis exciting current reference value on the basis of which the ac motor generates a magnetic flux, and a q-axis torque current reference value, the d-axis and the q-axis being orthogonal to each other; a current control circuit generates ac voltage reference values Vu*, Vv* and Vw* from the d-axis exciting current reference value and the q-axis torque current reference value; and a drive signal generator generates drive signals to drive power devices from the ac voltage reference values. Both the current reference generator and the current control circuit are processed digitally by the same arithmetic unit.
    • 电动汽车需要更紧凑,重量轻的驱动单元,以提高每次充电的里程,加速性能和整体效率。 产生驱动信号以驱动功率转换器中的功率器件的控制装置包括:电流基准发生器根据转矩参考值来计算交流电动机产生磁通的d轴励磁电流参考值,以及 q轴转矩电流基准值,d轴和q轴彼此正交; 电流控制电路根据d轴励磁电流基准值和q轴转矩电流参考值产生交流电压参考值Vu *,Vv *和Vw *; 并且驱动信号发生器产生驱动信号以从交流电压参考值驱动功率器件。 电流参考发生器和电流控制电路都由相同的运算单元进行数字处理。