Control device of neutral point clamped power inverter apparatus
    111.
    发明授权
    Control device of neutral point clamped power inverter apparatus 失效
    中性点钳式电力逆变装置控制装置

    公开(公告)号:US5274542A

    公开(公告)日:1993-12-28

    申请号:US841816

    申请日:1992-02-26

    CPC分类号: H02M7/487

    摘要: A power inverter control device is designed to control a neutral point clamped power inverter apparatus including first to fourth self-extinction elements sequentially connected in series between two end terminals of a power supply having an intermediate terminal, four freewheeling diodes connected in parallel with the self-extinction elements in a direction opposite thereto, a series circuit of first and second clamping diodes, connected in parallel with a series circuit of the second and third self-extinction elements in a direction opposite thereto and having a node connected to the intermediate terminal of the power supply. The control device includes a circuit for generating a first PWM control signal having a pulse width corresponding to a load current, and a PWM control circuit for converting the first PWM control signal into a second PWM control signal having a pulse width equivalent to the sum of the pulse width of the first PWM control signal and a width corresponding to one of turn-on and turn-off periods of each of the self-extinction element, and supplying the second PWM control signal to the first to fourth self-extinction elements.

    摘要翻译: 电力逆变器控制装置被设计成控制中性点钳位功率逆变器装置,其包括顺序地串联连接在具有中间端子的电源的两个端子之间的第一至第四自消除元件,与自身并联连接的四个续流二极管 在与其相反的方向上的消光元件,第一和第二钳位二极管的串联电路,与第二和第三自消除元件的串联电路在与其相反的方向并联连接,并且具有连接到第二和第二钳位二极管的中间端子的节点 电源。 该控制装置包括用于产生具有对应于负载电流的脉冲宽度的第一PWM控制信号的电路,以及PWM控制电路,用于将第一PWM控制信号转换成具有等于 第一PWM控制信号的脉冲宽度和对应于每个自消除元件的导通和关断周期之一的宽度,并将第二PWM控制信号提供给第一至第四自消光元件。

    Control apparatus for induction machine
    113.
    发明授权
    Control apparatus for induction machine 失效
    感应电机控制装置

    公开(公告)号:US5003243A

    公开(公告)日:1991-03-26

    申请号:US250171

    申请日:1988-09-28

    IPC分类号: H02P21/08 H02P21/14

    CPC分类号: H02P21/09 H02P2207/01

    摘要: A slip frequency type vector control apparatus for an induction machine which is provided with first and second feedback circuits for correcting respective magnetization current command and torque current command supplied feed-forwardly so as to eliminate the influence of a change in temperature of the induction machine secondary resistance and realize a correct vector control.

    Semiconductor device with parallel multiplier using at least three
wiring layers
    114.
    发明授权
    Semiconductor device with parallel multiplier using at least three wiring layers 失效
    具有并联乘法器的半导体器件使用至少三个布线层

    公开(公告)号:US4979018A

    公开(公告)日:1990-12-18

    申请号:US407152

    申请日:1989-09-14

    申请人: Shigeru Tanaka

    发明人: Shigeru Tanaka

    CPC分类号: G06F7/533 G06F2207/4802

    摘要: In a semiconductor device of the present invention, partial products of a multiplicand and a specific bit of a multiplier are formed by a plurality of partial product producing circuits. The results of multiplication obtained from the partial product producing circuits are output to one of full adders serving as first partial sum producing circuits through a first connection wire formed of a first metal wiring layer and a second metal wiring layer formed above the first layer. In the first full adders, specific bits of the partial product producing circuits are grouped for addition. The result of this addition is output to a second full adder through a second connection wire formed of a third metal wiring layer formed above the second layer. In the second full adder, the results of addition obtained from the first full adders are added together, and then the result obtained from the second full adder is output to other full adders and a final full adder to obtain the product of the multiplicand and the multiplier.

    摘要翻译: 在本发明的半导体器件中,通过多个部分积产生电路形成乘法器的乘法器和特定位的部分积。 通过由形成在第一层上的第一金属布线层和第二金属布线层形成的第一连接线,将从部分积产生电路获得的相乘结果输出到用作第一部分和产生电路的全加法器之一。 在第一个全加法器中,部分乘积生成电路的特定位被分组以进行加法。 该添加的结果通过由形成在第二层上方的第三金属布线层形成的第二连接线输出到第二全加器。 在第二个全加器中,将从第一个全加法器获得的相加结果相加在一起,然后从第二个全加器得到的结果输出到其他全加器,最终的全加法器得到被乘数乘积 乘数。

    High voltage cable assembly having reduced stray capacitance
    118.
    发明授权
    High voltage cable assembly having reduced stray capacitance 失效
    具有降低的杂散电容的高压电缆组件

    公开(公告)号:US4684766A

    公开(公告)日:1987-08-04

    申请号:US778002

    申请日:1985-09-20

    CPC分类号: H01B7/30 H01B9/02

    摘要: A high voltage power cable assembly for applying rectangular high voltage pulses to an X-ray tube of an X-ray diagnostic apparatus, including two conducting lines formed of a plurality of stranded or twisted wires covered with insulating layers, two conductors including a plurality of stranded or twisted wires arranged in opposition to a contact point of the conduct lines, the conductors having opposite ends connected to each other, a semi-conductive layer enclosing the conducting lines and the conductors, an insulating layer covering the semi-conductive layer, a shield layer covering the insulating layer, and a sheath wrapping the shield layer.

    摘要翻译: 一种用于向X射线诊断装置的X射线管施加矩形高压脉冲的高压电力电缆组件,包括由绝缘层覆盖的多根绞合或双绞线形成的两条导线,包括多个 布置成与导线的接触点相对布置的绞合线或双绞线,具有彼此连接的相对端的导体,包围导线和导体的半导体层,覆盖半导体层的绝缘层, 覆盖绝缘层的屏蔽层和包裹屏蔽层的护套。

    Apparatus for operating cycloconverters in parallel fashion
    119.
    发明授权
    Apparatus for operating cycloconverters in parallel fashion 失效
    以平行方式操作循环换流器的装置

    公开(公告)号:US4673823A

    公开(公告)日:1987-06-16

    申请号:US813879

    申请日:1985-12-27

    申请人: Shigeru Tanaka

    发明人: Shigeru Tanaka

    IPC分类号: H02J3/36 H02M5/27 H02P13/30

    摘要: Power is fed to a plurality of loads by a respective plurality of circulating current type cycloconverters connected to an ac power supply. A power compensating capacitor common to the cycloconverters is provided at the ac power receiving-end to deliver a leading reactive power to the ac power supply. Further, each cycloconverter is provided with means for delivering a circulating current and means for delivering a circulating current command value to the circulating current control means. A lagging reactive power corresponding to the leading reactive power by the power factor compensating capacitor is delivered to the ac power supply. The power factor compensating capacitor may be configured so that its capacity is variable by changing the number of stages connected. In addition, the circulating current command value may vary depending upon the peak value of the current flowing in each cycloconverter.

    摘要翻译: 通过连接到交流电源的相应的多个循环电流型循环变频器将功率馈送到多个负载。 在交流电力接收端提供了循环变换器公共的功率补偿电容器,以向交流电源提供引导的无功功率。 此外,每个循环换流器设置有用于输送循环电流的装置和用于将循环电流指令值递送到循环电流控制装置的装置。 通过功率因数补偿电容器对应于前导无功功率的滞后无功功率被传送到交流电源。 功率因数补偿电容器可以被配置为使得其容量可通过改变所连接的级数来变化。 此外,循环电流指令值可以根据在每个循环换流器中流动的电流的峰值而变化。

    Method and apparatus for sewing a slide fastener to fabric pieces
    120.
    发明授权
    Method and apparatus for sewing a slide fastener to fabric pieces 失效
    将拉链缝合到织物件的方法和装置

    公开(公告)号:US4593635A

    公开(公告)日:1986-06-10

    申请号:US708727

    申请日:1985-03-06

    CPC分类号: D05B35/064 D05B35/105

    摘要: An improved method and apparatus for assembling fastening elements to fabric pieces including sewing separated fastener stringer tapes to respective fabric pieces pulling the sewn element downstream as the sewing proceeds, and partially combining the separated stringer tapes by pulling the slider downstream through a portion of the length of the fastener elements while retarding movement of the stringer tapes at their upstream ends.

    摘要翻译: 一种用于将紧固件组装到织物件上的改进方法和装置,包括将缝合的分离的拉链条带缝合成在缝合进行时将缝合元件拉下来的各个织物片,以及通过将滑块向下拉一段长度 同时延迟纵梁在其上游端的移动。