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412 条记录 (耗时 0.016 秒)

    System for driving a direct-current motor in synchronism with an external signal
    61.
    发明授权
    System for driving a direct-current motor in synchronism with an external signal 失效
    用于与外部信号同步驱动直流电动机的系统

    公开(公告)号：US3931556A

    公开(公告)日：1976-01-06

    申请号：US406374

    申请日：1973-10-15

    申请人： Itsuki Ban ,  Manabu Shiraki

    发明人： Itsuki Ban ,  Manabu Shiraki

    IPC分类号： H02P3/08 ,  H02P3/10 ,  H02P3/12 ,  H02P6/14 ,  H02P7/06 ,  H02P7/288 ,  H02P7/29 ,  H02P23/00 ,  H02K29/00

    CPC分类号： H02P6/14 ,  H02P23/22 ,  H02P7/291

    摘要： For driving a direct-current motor in tune with the frequency of an external synchronizing signal regardless of any abrupt change in the load or in the synchronizing signal frequency, a rotor position signal is produced in the form of a succession of pulses in phased relationship to the rotation of the motor. A first control circuit is provided to initiate the supply of electrical energy from a DC power supply to the motor in response to each pulse of the synchronizing signal and to suspend the supply of electrical energy in response to each pulse of the rotor position signal. This first control circuit is combined with second and third control circuits adapted to modify the operation of the first control circuit in event the motor has fallen out of synchronism. Thus, when the actual speed of the motor becomes higher than the required synchronous speed, the second control circuit operates to permit the motor to be fed continuously from the DC power supply, and when the actual motor speed becomes lower than the synchronous speed, the third control circuit operates to prevent the motor from being fed from the DC power supply, until the motor is pulled back into synchronous operation. Several other embodiments are disclosed.

    摘要翻译： 为了驱动与外部同步信号的频率一致的直流电动机，无论负载的突然变化或同步信号频率如何，转子位置信号以一系列脉冲的形式产生，分阶段相关 电机的旋转。 提供第一控制电路以响应于同步信号的每个脉冲启动从DC电源向电动机的电能供应，并且响应于转子位置信号的每个脉冲暂停供应电能。 该第一控制电路与第二和第三控制电路组合，适于在电动机已经失去同步的情况下修改第一控制电路的操作。 因此，当电动机的实际速度高于所需的同步速度时，第二控制电路运行以允许电动机从直流电源连续供电，并且当实际的电动机转速低于同步转速时， 第三控制电路用于防止电动机从直流电源馈送，直到电动机被拉回到同步操作。 公开了几个其它实施例。

    Braking-mode detection circuit
    62.
    发明授权
    Braking-mode detection circuit 失效
    制动模式检测电路

    公开(公告)号：US3855512A

    公开(公告)日：1974-12-17

    申请号：US36897373

    申请日：1973-06-11

    申请人： GEN ELECTRIC

    发明人： KONRAD C

    IPC分类号： B60L7/00 ,  B60L11/18 ,  H02P3/08 ,  H02P7/29

    CPC分类号： B60L11/1805 ,  H02P3/08 ,  H02P7/29 ,  Y02T10/646 ,  Y02T10/648 ,  Y02T10/7005

    摘要： Means for detecting operation of a direct-current motor in the reversed or braking mode. Means are provided for receiving signals representative of armature current and of the mark-space conduction ratio of a motor control thyristor A rise in motor current above a predetermined value, coupled with a decline in mark-space ratio below a predetermined value, causes the disclosed circuit to produce an output signal which is utilized to temporarily limit conduction of the motor control thyristor and procure controlled deceleration.

    摘要翻译： 用于在反转或制动模式下检测直流电动机的操作的装置。 提供了用于接收代表电枢电流的信号和电动机控制晶闸管A的标记空间导通比的电动机电流高于预定值的上升，加上标记空间比的下降超过预定值，导致所公开的 产生用于临时限制电动机控制晶闸管的传导并获得受控减速度的输出信号的电路。

    Variable duty cycle traction motor control providing controlled plugging
    63.
    发明授权
    Variable duty cycle traction motor control providing controlled plugging 失效
    可变负载循环跟踪电机控制提供控制插拔

    公开(公告)号：US3828235A

    公开(公告)日：1974-08-06

    申请号：US34956273

    申请日：1973-04-09

    申请人： ALLIS CHALMERS

    发明人： PRICE R ,  STICH F

    IPC分类号： H02P3/08 ,  B60L7/00 ,  B60L11/18 ,  H02P3/10

    CPC分类号： B60L11/1805 ,  H02P3/10 ,  Y02T10/642 ,  Y02T10/7005

    摘要： A vehicle driven by a reversible electric traction motor controlled by variable duty cycle current pulses from a battery reduces the frequency of oscillator triggering pulses when the direction selection lever is reversed and the motor is being driven as a generator in order to reduce field excitation and provide smooth plugging when vehicle direction is reversed but does not change triggering pulse frequency if the motor is driven as a generator when the vehicle is rolling backward down a ramp and full tractive power is required. A plugging potentiometer permits setting the maximum severity of plugging.

    摘要翻译： 由可变负载循环电流脉冲控制的可逆电力牵引电动机驱动的车辆当方向选择杆反向并且电动机被驱动作为发电机时减少了振荡器触发脉冲的频率，以减少场激励并提供 当车辆方向相反时平滑堵塞，但是当车辆沿斜坡向后滚动并且需要全牵引力时，如果电动机作为发电机驱动，则不改变触发脉冲频率。 堵塞电位器允许设置最大的堵塞严重性。

    Pulse-to-revolution converter for converting a variable pulse frequency into a proportional rotation speed of a shaft
    65.
    发明授权
    Pulse-to-revolution converter for converting a variable pulse frequency into a proportional rotation speed of a shaft 失效
    用于将可变脉冲频率转换成轴的比例旋转速度的脉冲转换器

    公开(公告)号：US3778693A

    公开(公告)日：1973-12-11

    申请号：US3778693D

    申请日：1972-08-30

    申请人： PHILIPS CORP

    发明人： KORTELING A

    IPC分类号： H02P3/08 ,  H02P7/29 ,  H02P23/00 ,  H02P29/00 ,  H02P5/16

    CPC分类号： H02P23/186 ,  Y10S388/902 ,  Y10S388/908

    摘要： By providing a conventional pulse-to-revolution converter comprising a motor control circuit and a tacho signal negativefeedback loop with an additional negative-feedback loop an exact ratio is obtainable between the variable pulse repetition frequency of a pulse train and the rotation speed of a rotating shaft coupled to the motor. The shaft carries a shaft position pick-up which via a switching device operates a correction signal source.

    摘要翻译： 通过提供一种常规的脉冲到转速转换器，其包括具有附加的负反馈回路的电动机控制电路和转速信号负反馈回路，可以在脉冲串的可变脉冲重复频率和 联接到电动机的旋转轴。 轴承有轴位置拾取器，其经由开关装置操作校正信号源。

    Intermittent control device
    66.
    发明授权
    Intermittent control device 失效
    间歇控制装置

    公开(公告)号：US3643145A

    公开(公告)日：1972-02-15

    申请号：US3643145D

    申请日：1969-04-18

    申请人： DAVID TANN ,  ROBERT A NOETZOID

    发明人： TANN DAVID ,  NOETZOID ROBERT A

    IPC分类号： B60S1/08 ,  H02P3/08

    CPC分类号： B60S1/0807 ,  Y10S15/15

    摘要： A control device for operating windshield wiper blades intermittently with a dwell period between wiping cycles. The length of time of the dwell periods is determined by a thermistor. The resistance of the thermistor is varied by the wiper motor current so that the length of time of the dwell periods is varied inversely with the moisture on the windshield.

    摘要翻译： 一种用于在擦拭周期之间停留时间间歇地操作挡风玻璃刮水器叶片的控制装置。 停留时间的长短由热敏电阻决定。 热敏电阻的电阻由刮水器电动机电流变化，使得停留时间的时间长度与挡风玻璃上的湿度成反比变化。