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    • 2. 发明授权
    • Space photovoltaic power generation method and system
    • 太空光伏发电方法与系统
    • US06528719B2
    • 2003-03-04
    • US09871984
    • 2001-06-04
    • Izumi MikamiYoshihiko KonishiKazuyuki Takada
    • Izumi MikamiYoshihiko KonishiKazuyuki Takada
    • H01L31042
    • B64G1/443B64G1/1085B64G1/242B64G1/428H02J17/00H02J50/20H02J50/40Y10S136/292
    • A space photovoltaic power generation system including a plurality of power satellites arranged in space, each of which converts electrical energy, into which sunlight has been photoelectric-converted, into a microwave, and transmits the microwave to an electric power base. The space photovoltaic power generation system divides the plurality of power satellites into a number of power satellite groups and adjusts the amount of phase adjustment to be made to a microwave which each of the plurality of power satellites included in each power satellite group will transmit so that a plurality of microwaves from the plurality of power satellites included in each power satellite group are in phase with one another. The beamwidth of the plurality of microwaves can be reduced without increasing the area of the aperture of a transmission antenna of each of the plurality of power satellites. If the plurality of microwaves transmitted from the plurality of power satellites included in each power satellite group interfere with microwaves transmitted from any other power satellite group, the beamwidth is reduced. To avoid the reduction in the beamwidth, each of the plurality of power satellites included in each power satellite group modulates the phase-adjusted microwave so as to generate an incoherent microwave so that the microwave does not interfere with other microwaves transmitted from any other power satellite group.
    • 空间光伏发电系统,其包括多个布置在空间中的功率卫星,每个功率卫星将太阳光已被光电转换的电能转换成微波,并将微波传输到电力基座。 空间光伏发电系统将多个功率卫星分成多个功率卫星组,并调整对每个功率卫星组中包含的多个功率卫星中的每一个发射的微波的相位调整量,使得 包括在每个功率卫星组中的多个功率卫星的多个微波彼此同相。 可以减少多个微波的波束宽度,而不增加多个功率卫星中的每一个的发射天线的孔径的面积。 如果从包含在每个功率卫星组中的多个功率卫星发送的多个微波干扰从任何其他功率卫星组发射的微波,则波束宽度减小。 为了避免波束宽度的减小,包括在每个功率卫星组中的多个功率卫星中的每一个调制相位调整的微波以产生非相干微波,使得微波不干扰从任何其它功率卫星发射的其他微波 组。
    • 7. 发明授权
    • Protection apparatus for brushless motor
    • 无刷电机保护装置
    • US5929576A
    • 1999-07-27
    • US839741
    • 1997-04-15
    • Masahiro YasoharaKazuyuki TakadaYoshihiro Fujisaki
    • Masahiro YasoharaKazuyuki TakadaYoshihiro Fujisaki
    • H02P6/06H02H7/08H02H7/093H02P6/00H02P6/12H02P6/16H02K23/00
    • H02H7/0833H02P6/17H02P6/34H02H7/093
    • A protection apparatus used in a brushless motor is arranged by a brushless motor; a commutation signal detecting unit for detecting a position of a movable member of the brushless motor; a speed detecting unit for detecting a rotation speed of the movable member of the brushless motor, involving a rotation direction thereof, in response to the detection signal outputted from the commutation signal detecting unit; and a drive circuit for producing a commutation signal used to drive the movable member of the brushless motor in response to the detection signal outputted from the commutation signal detecting unit and for driving the brushless motor based upon the commutation signal. The protection apparatus is further constructed of an output voltage instructing unit for supplying to the drive circuit, an output voltage instruction signal for instructing an output voltage of the drive circuit, which constitutes a drive voltage when the brushless motor is driven; a voltage limit level setting unit for setting an upper limit value of the output voltage of the drive circuit; and a voltage limiter unit for limiting the output signal of the output voltage instructing unit based on the setting value of the voltage limit level setting unit to thereby limit an upper limit value of the output voltage of the drive circuit.
    • 用于无刷电动机的保护装置由无刷电动机布置; 换流信号检测单元,用于检测无刷电机的可动件的位置; 速度检测单元,用于响应于从换流信号检测单元输出的检测信号,检测包括其旋转方向的无刷电动机的可动构件的转速; 以及用于产生换向信号的驱动电路,用于响应于从换向信号检测单元输出的检测信号驱动无刷电动机的可动件,并根据换向信号驱动无刷马达。 保护装置进一步由输出电压指令单元构成,用于向驱动电路提供用于指示驱动电路的输出电压的输出电压指令信号,该驱动电路在驱动无刷电动机时构成驱动电压; 电压限制电平设定单元,用于设定驱动电路的输出电压的上限值; 以及电压限制器单元,其基于所述电压限制电平设定单元的设定值来限制所述输出电压指示单元的输出信号,从而限制所述驱动电路的输出电压的上限值。
    • 8. 发明授权
    • Output circuit of PWM inverter
    • PWM逆变器的输出电路
    • US5347444A
    • 1994-09-13
    • US143504
    • 1993-10-29
    • Kazuyuki TakadaToru Kishi
    • Kazuyuki TakadaToru Kishi
    • H02M7/5387H02M5/44
    • H02M7/5387
    • An inexpensive output circuit of a PWM inverter for PWM controlling a coil voltage of a motor with small control error of voltage at a motor winding terminal and low power consumption includes an N channel power MOS-FET, a P channel power MOS-FET, a current control circuit 1 having a current output terminal, and a current control circuit 2 having a current input terminal. A current flowing out from the current output terminal of the current control circuit 1 and a current flowing in from the current input terminal of the current control circuit 2 are subjected to particular control to thereby control the N channel power MOS-FET and the P channel power MOS-FET.
    • 用于对电动机绕组端子的电压控制误差小的电动机的线圈电压进行PWM控制的PWM逆变器的廉价输出电路包括N沟道功率MOS-FET,P沟道功率MOS-FET, 具有电流输出端的电流控制电路1和具有电流输入端的电流控制电路2。 从电流控制电路1的电流输出端流出的电流和从电流控制电路2的电流输入端流入的电流受到特定的控制,从而控制N沟道功率MOS-FET和P沟道 功率MOS-FET。