Motor speed adjusting apparatus
    32.
    发明授权
    Motor speed adjusting apparatus 失效
    电机调速装置

    公开(公告)号:US4211967A

    公开(公告)日:1980-07-08

    申请号:US898852

    申请日:1978-04-21

    摘要: A motor speed adjusting apparatus comprising a motor, a motor speed setting device such as an up-down counter, a programmable divider the divisor of which is programmed by the motor speed setting device, a reference signal generator, a phase comparator which generates a d.c. voltage corresponding to the phase difference between the reference frequency signal and the output signal of the programmable divider, and a voltage controlled oscillator which oscillates at a frequency corresponding to the output of the phase comparator. The motor speed is adjusted according to the output frequency of the oscillator by step deviation from the standard motor speed, and further that deviation is displayed by a display device controlled by the motor speed setting device.

    摘要翻译: 一种电动机速度调节装置,包括电动机,诸如升降计数器的电动机速度设定装置,由电动机速度设定装置编程的可变分频器,参考信号发生器,产生直流电压的相位比较器。 对应于参考频率信号和可编程分频器的输出信号之间的相位差的电压,以及以对应于相位比较器的输出的频率振荡的压控振荡器。 电机速度根据振荡器的输出频率与标准电机转速的偏差进行调整,此外,由电机速度设定装置控制的显示装置显示偏差。

    Electronic control apparatus
    33.
    发明授权
    Electronic control apparatus 失效
    电子控制装置

    公开(公告)号:US4035700A

    公开(公告)日:1977-07-12

    申请号:US640265

    申请日:1975-12-12

    CPC分类号: H02M7/53875 H02P6/14

    摘要: An electronic control apparatus for controlling currents supplied to star-connected multiphase loads. The apparatus has two sets of switching means, a reference signal source, a voltage detector for detecting the voltage of the common terminal of the star-connection, a comparator for comparing the outputs of the voltage detector and the reference signal source, a feedback amplifier for amplifying the output of the comparator, a load current supplying means for supplying a current to the multiphase loads through one set of the two sets of the switching means according to a command signal, a feedback current draining means coupled to the feedback amplifier and the other set of the two sets of the switching means, and a timing signal generator for selectively switching the two sets of the switching means, wherein the feedback current draining means drains the current through said other set of switching means from the multiphase loads so as to keep the voltage at the common terminal of the star connection constant or substantially constant regardless of the mode of the timing signal generator.

    摘要翻译: 一种用于控制提供给星形连接的多相负载的电流的电子控制装置。 该装置具有两组开关装置,参考信号源,用于检测星形连接的公共端子的电压的电压检测器,用于比较电压检测器和参考信号源的输出的比较器,反馈放大器 用于放大比较器的输出;负载电流提供装置,用于根据命令信号,通过一组两组开关装置向多相负载提供电流;耦合到反馈放大器的反馈电流消耗装置和 两组开关装置中的另一组,以及用于选择性地切换两组开关装置的定时信号发生器,其中反馈电流消耗装置从多相负载中排出通过所述另一组开关装置的电流,以便 将恒星连接的公共端子处的电压保持恒定或基本恒定,而不管定时信号类型的模式如何 呃

    Motor driving apparatus and motor driving method
    34.
    发明授权
    Motor driving apparatus and motor driving method 有权
    电机驱动装置及电机驱动方式

    公开(公告)号:US07122980B2

    公开(公告)日:2006-10-17

    申请号:US11242386

    申请日:2005-10-03

    IPC分类号: H02P6/18

    CPC分类号: H02P6/182 H02P6/21

    摘要: A motor driving apparatus includes a comparator, a threshold controller, a position determining unit, a phase-switching controller, and a current output unit. While the rotor is stopped, the phase-switching controller supplies a predetermined phase of winding with a current pulse having a predetermined pulse width so as not to cause the rotor to react and operate, in order to determine the initial position of the rotor. The position determining unit determines an initial position of the rotor based on the result of comparison between the induced voltage generated in a non-conduction phase by the current pulse and the threshold. The phase-switching controller performs energization or commutation according to the determined initial position of the rotor to start up the motor.

    摘要翻译: 电动机驱动装置包括比较器,阈值控制器,位置确定单元,相位切换控制器和电流输出单元。 当转子停止时,相位切换控制器以预定的脉冲宽度的电流脉冲提供预定的绕组相位,以便不使转子发生反应和操作,以便确定转子的初始位置。 位置确定单元基于通过当前脉冲在非导通相中产生的感应电压与阈值之间的比较结果来确定转子的初始位置。 相位切换控制器根据确定的转子的初始位置执行通电或换向以启动电动机。

    Control system for an induction motor

    公开(公告)号:US5670854A

    公开(公告)日:1997-09-23

    申请号:US570871

    申请日:1995-12-12

    摘要: A control system for an induction motor of the present invention independently commands the torque current component and the exciting current component of a stator current group supplied to the stator of an induction motor so as to feed-back control the amplitude and phase of the stator current group. The torque current component is commanded to control the output torque of the induction motor in correspondence with the output of a steering force sensor for detecting the steering force. According to an electric power steering apparatus using an induction motor controlled by the control system, a permanent magnet is not used for the motor so additional equipment such as a clutch is not required. Consequently, the structure can be simplified and the size of the unit can be reduced. Further, manual steering operation can be performed in the case of failure.

    Dust collector/remover in knitting machine and its controlling method
    37.
    发明授权
    Dust collector/remover in knitting machine and its controlling method 失效
    针织机除尘器及其控制方法

    公开(公告)号:US5323509A

    公开(公告)日:1994-06-28

    申请号:US940512

    申请日:1992-09-04

    IPC分类号: D04B15/40 D04B35/32

    CPC分类号: D04B35/32 D04B15/40

    摘要: Mutually spaced fiber waste collectors upon the knitting machine and creel of a knitting unit collect fiber waste which is then withdrawn by a fiber waste remover that is selectively connectable to different ones of the fiber waste collectors. Sensors detect when the fiber waste collected by the collectors exceeds a predetermined amount.

    摘要翻译: 在针织机和编织单元的架轴上相互间隔的纤维废物收集器收集纤维废料,然后由可选择地连接到不同纤维废料收集器的纤维废料去除器取出。 传感器检测收集器收集的纤维废物何时超过预定量。

    Electrical connector having case
    39.
    发明授权
    Electrical connector having case 失效
    电气连接器

    公开(公告)号:US5228868A

    公开(公告)日:1993-07-20

    申请号:US782659

    申请日:1991-10-25

    CPC分类号: H01R13/6593

    摘要: An electrical connector having a cover case for fixing therein the connector. The cover case consists of two case halves arranged one upon the other. The cover case having at a take-up opening of a cable an inner sleeve through which the cable passes. The inner sleeve consists of two semicylinders fixed to the casing halves, respectively. The cover case further has an outer sleeve which, after the inner sleeve is covered by the outer sleeve, is caulked to provide urging force onto the inner sleeve against its outer surface. Abutment edges of the two semicylinders of the inner sleeve are formed as wave-shaped edges waved in the abutment plane of the abutment edges so that the wave-shaped edges of one semicylinder are not coincident with the wave-shape edges of the other semicylinder. In another embodiment, abutment edges of the two semicylinders of the inner sleeve are provided with projecting plate members extending in the abutment plane of the abutment edges. The abutment edges of the two semicylinders are prevented from moving out of abutment with each other when the inner sleeve is subjected to compressive force when the cable is caulked.

    Two blade type impulse wrench
    40.
    发明授权
    Two blade type impulse wrench 失效
    两刀式脉冲扳手

    公开(公告)号:US4920836A

    公开(公告)日:1990-05-01

    申请号:US196948

    申请日:1988-05-20

    IPC分类号: B25B21/02

    CPC分类号: B25B21/02

    摘要: This invention relates to an impulse wrench which has two blades but generates only one impact pulse on the main shaft per one rotation of a liner. In this invention, a liner has at least four seals and a main shaft has at least two seals. And the shape of both or one of the two seals out of at least two seals of main shaft is other than a linear shape parallel to the axial center.If both of said two seals of main shaft are in said shape, two of at least four seals of liner are in the same shape. The other seals of liner are in a linear shape parallel to the axial center.If one of said two seals of main shaft is in said shape, one of at least four seals of liner is in the same shape as this. All of the other seals of liner are in a linear shape parallel to the axial center.In this way, said two seals of liner and said two seals of main shaft coincide with each other only once per one rotation of the liner.

    摘要翻译: 本发明涉及一种脉冲扳手,其具有两个叶片,但是每一轮衬套在主轴上仅产生一个冲击脉冲。 在本发明中,衬套具有至少四个密封件,并且主轴具有至少两个密封件。 并且主轴的至少两个密封件中的两个密封件中的两个或一个的形状不同于与轴向中心平行的直线形状。 如果主轴的所述两个密封件都是所述形状,则衬垫的至少四个密封件中的两个是相同的形状。 衬套的其他密封件是平行于轴向中心的直线形状。 如果主轴的所述两个密封件中的一个处于所述形状,则衬垫的至少四个密封件之一与其形状相同。 衬垫的所有其他密封件都是平行于轴向中心的直线形状。 以这种方式,衬套的所述两个密封件和主轴的所述两个密封件在衬套的每旋转一次彼此重合。