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    • 1. 发明授权
    • Power converter/inverter system with instantaneous real power feedback
control
    • 功率转换器/逆变器系统具有瞬时有功功率反馈控制
    • US5373223A
    • 1994-12-13
    • US82004
    • 1993-06-24
    • Yasufumi AkagiNorio ItoTatsuya Shimoda
    • Yasufumi AkagiNorio ItoTatsuya Shimoda
    • H02P27/08H02M5/458H02M5/40
    • H02M5/4585
    • A power converter/inverter system for a load comprises a converter circuit for converting an alternating current power input into a direct current power intermediate signal in response to a first PWM voltage. An inverter inverts the DC power intermediate signal into an AC power output in response to a second PWM voltage. A smoothing filter is arranged in series between a converter and the inverter for filtering the DC power intermediate signal. An instantaneous real power calculating circuit calculates an instantaneous real power (IRP) relative to the inverter and is determined by a torque current command value and a load angular speed signal. A converter controller controls the first PWM voltage of the converter in accordance of a combination a predetermined converter amplitude setpoint, a DC voltage present at the DC power intermediate signal, and the instantaneous real power product. An inverter controller controls the second PWM voltage of the inverter in accordance with the inverter amplitude setpoint and amplitude of the AC power output.
    • 用于负载的电力转换器/逆变器系统包括用于响应于第一PWM电压将交流电力输入转换为直流电力中间信号的转换器电路。 反相器响应于第二PWM电压,逆变器将DC电力中间信号反相变成AC电力输出。 平滑滤波器串联布置在转换器和逆变器之间,用于对直流电源中间信号进行滤波。 瞬时有功功率计算电路计算相对于逆变器的瞬时有功功率(IRP),并由转矩电流指令值和负载角速度信号确定。 A转换器控制器根据预定的转换器幅度设定点,存在于DC功率中间信号的直流电压和瞬时有功功率产物的组合来控制转换器的第一PWM电压。 逆变器控制器根据逆变器幅度设定值和交流电源输出的幅度控制逆变器的第二个PWM电压。
    • 3. 发明授权
    • Superconducting bearing
    • 超导轴承
    • US5525849A
    • 1996-06-11
    • US284680
    • 1994-08-09
    • Norio ItoTatsuya ShimodaHiroshi ImaizumiHiromasa HigasaFumihiko Ishikawa
    • Norio ItoTatsuya ShimodaHiroshi ImaizumiHiromasa HigasaFumihiko Ishikawa
    • F16C39/06H02K7/09
    • F16C32/0438Y10S505/877
    • A superconducting bearing comprises a rotating member A and a fixed member B, one of which is provided with a superconducting member (5) while the other is provided with a magnet (8). The superconducting member (5) includes a superconductor (4) for floating the magnet (8) and a support (3) for supporting the superconductor (4). The magnet (8) includes a ring-like magnet (11) which is coaxial with the axis of the rotary member A, and the ring-like magnet (11) and the superconductor member (5) are so disposed as to face each other with a gap between them. A magnetic flux diffusion member (13) is disposed on the surface of the ring-like magnet (11) opposed to the superconductor (5). The ring-like magnet (11) comprises two ring-like magnets (11A and 11B) having mutually different diameters, and the ring-like magnets (11A and 11B) are magnetized so that the directions of magnetic fluxes face slantingly with one another.
    • PCT No.PCT / JP93 / 00172 Sec。 371日期1994年8月9日 102(e)日期1994年8月9日PCT提交1993年2月10日PCT公布。 公开号WO93 / 16294 日期:1993年8月19日。超导轴承包括旋转构件A和固定构件B,其中一个具有超导构件(5),而另一个设置有磁体(8)。 超导构件(5)包括用于浮动磁体(8)的超导体(4)和用于支撑超导体(4)的支撑件(3)。 磁体(8)包括与旋转构件A的轴线同轴的环状磁体(11),并且环状磁体(11)和超导体构件(5)被设置成彼此面对 他们之间有差距。 在与超导体(5)相对的环状磁体(11)的表面上设置磁通扩散部件(13)。 环形磁体(11)包括具有相互不同直径的两个环状磁体(11A和11B),并且使环状磁体(11A和11B)磁化,使得磁通量的方向彼此倾斜。
    • 10. 发明授权
    • Process and apparatus for press-forming tubular container-like article
from strip, including forward and backward ironing steps
    • 用于从带状压制成形管状容器状制品的方法和装置,包括前进和后退熨烫步骤
    • US5329799A
    • 1994-07-19
    • US67050
    • 1993-05-25
    • Norio ItoKoichi Mine
    • Norio ItoKoichi Mine
    • B21D22/30B21D22/24
    • B21D22/30
    • Method and apparatus for pressing a sheet blank into a tubular container, including a first process or device for drawing the blank into an intermediate workpiece having a tubular portion and a bottom portion closing one end of the tubular portion, and a second process or device for ironing the tubular portion in the axial direction. The second process includes a forward ironing step for placing the workpiece on a first ironing punch and forcing the workpiece and first punch together into a first die hole, to iron the tubular portion in an axial direction from the above one end toward the other end, and a backward ironing step for placing the workpiece on a columnar second ironing punch and forcing the workpiece and second punch together into a second die hole, with a columnar pushing punch held in pressing contact with the outer surface of the bottom portion of the workpiece, to iron the tubular portion in the direction opposite to that in the forward ironing step.
    • 用于将片状坯料压制成管状容器的方法和装置,包括用于将坯料拉入具有封闭管状部分的一端的管状部分和底部的中间工件的第一工艺或装置,以及用于 在轴向上熨烫管状部分。 第二工序包括:前进熨烫步骤,用于将工件放置在第一熨烫冲头上,并迫使工件和第一冲头一起成为第一模孔,从而从上述一端向另一端沿轴向熨烫管状部分; 以及向后熨烫步骤,用于将工件放置在柱状的第二熨烫冲头上,并且将工件和第二冲头一起加压到第二模孔中,柱形推压冲头保持与工件底部的外表面压接, 以与前向熨烫步骤相反的方向熨烫管状部分。