Controller for elevator
    2.
    发明授权
    Controller for elevator 失效
    电梯控制器

    公开(公告)号:US4553640A

    公开(公告)日:1985-11-19

    申请号:US413820

    申请日:1982-09-01

    IPC分类号: B66B1/24 B66B1/16 B66B1/28

    CPC分类号: B66B1/285

    摘要: An elevator controller which uses an acceleration command signal that has as its initial value a start shock compensation torque which will offset the unbalance torque caused at the time of starting. From the completion of elevator car acceleration to the start of deceleration, the acceleration command is gradually increased or decreased to control the motor so as to provide a smoother motion of the car. After the inception of the car deceleration a velocity command is issued which decreases with the reducing distance between the car and the destination floor.

    摘要翻译: 一种电梯控制器,其使用加速度指令信号,该加速度指令信号具有起动减震补偿转矩作为初始值,该转矩将抵消起动时产生的不平衡转矩。 从电梯轿厢加速完成到减速开始,加速指令逐渐增大或减小,以控制电动机,以提供汽车的平稳运动。 在汽车减速开始之后,发出速度指令,随着轿厢和目的地楼层之间的减小距离而减小。

    Abnormal elevator speed detector
    3.
    发明授权
    Abnormal elevator speed detector 失效
    电梯速度检测器异常

    公开(公告)号:US4378059A

    公开(公告)日:1983-03-29

    申请号:US255103

    申请日:1981-04-17

    IPC分类号: B66B1/46 B66B5/06

    CPC分类号: B66B5/06

    摘要: An abnormal speed detector for an elevator system having an elevator car for servicing a plurality of floors, means for driving the elevator car in response to a speed command and a speed detector for detecting a running speed of the elevator car is disclosed. The abnormal speed detector comprises means for storing a set of speed data indicating a predetermined abnormal speed checking pattern as a function of running time or running distance of the elevator car, means for reading out of the storage means one of the set of speed data corresponding to an instant value of the running time or running position of the elevator car after the start of run, and means for comparing an actual speed of the elevator car with the readout speed data to determine if the speed of the elevator car is normal or not.

    摘要翻译: 公开了一种用于具有用于维修多个楼层的电梯轿厢的电梯系统的异常速度检测器,用于响应于速度指令驱动电梯轿厢的装置和用于检测电梯轿厢的行驶速度的速度检测器。 异常速度检测器包括用于存储指示作为电梯轿厢的行驶时间或行驶距离的函数的预定异常速度检查模式的一组速度数据的装置,用于从存储装置读出对应的一组速度数据中的一个 到运行开始后的电梯轿厢的运行时间或运行位置的即时值,以及用于将电梯轿厢的实际速度与读出速度数据进行比较的装置,以确定电梯轿厢的速度是否正常 。

    Method and apparatus for detecting elevator car position
    4.
    发明授权
    Method and apparatus for detecting elevator car position 失效
    检测电梯轿厢位置的方法和装置

    公开(公告)号:US4387436A

    公开(公告)日:1983-06-07

    申请号:US208579

    申请日:1980-11-20

    CPC分类号: B66B1/3492

    摘要: A pulse generator is coupled to a car drive motor directly coupled to a sheave, over which a rope suspending an elevator car is passed, and the position of the car is calculated through the counting of pulses produced from the pulse generator. First and second car position detectors for detecting respective first and second car positions are provided within a hatchway, and the number of pulses produced during a period from the actuation of the first car position detector till the actuation of the second car position detector is detected. A count value for calculating the car position is corrected according to the difference between the detected pulse number and a reference pulse number corresponding to the distance between the first and second car position detectors, thereby effecting the compensation for the wear of the sheave and rope to improve the precision of the car position detection.

    摘要翻译: 脉冲发生器被耦合到直接联接到滑轮的轿厢驱动电动机,通过该行驶轮胎悬挂电梯轿厢的绳索通过脉冲发生器产生的脉冲的计数来计算轿厢的位置。 检测相应的第一和第二轿厢位置的第一和第二车位检测器设置在舱口内,并且检测在从第一轿厢位置检测器的致动到第二轿厢位置检测器的致动期间产生的脉冲数。 根据检测到的脉冲数与对应于第一和第二轿厢位置检测器之间的距离的参考脉冲数之间的差来校正用于计算轿厢位置的计数值,从而对滑轮和绳索的磨损进行补偿 提高汽车位置检测精度。

    Elevator control apparatus
    6.
    发明授权
    Elevator control apparatus 失效
    电梯控制装置

    公开(公告)号:US4150734A

    公开(公告)日:1979-04-24

    申请号:US871801

    申请日:1978-01-24

    CPC分类号: B66B1/3492 B66B1/285

    摘要: An elevator car control apparatus is disclosed in which a three-phase AC tachometer generator is coupled to a motor for driving an elevator car, and the AC output of the tachometer generator is full-wave rectified for use as a speed feedback voltage. A waveform-shaping circuit generates one pulse for each cycle of the output of the AC tachometer generator. A counter counts such pulses after the car has passed a deceleration-initiating point, thereby producing the number of counts proportional to a car running distance after the passage of the deceleration-initiating point. From this number of counts, a deceleration command voltage decreasing progressively in accordance with car positions is obtained by a decoder and a digital-analog converter. During deceleration, the car-drive motor is subjected to feedback control in accordance with the difference between the speed feedback voltage and the deceleration command voltage, thus effecting deceleration control of the elevator car.

    摘要翻译: 公开了一种电梯轿厢控制装置,其中三相交流转速计发生器耦合到用于驱动电梯轿厢的电动机,并且转速计发生器的交流输出被全波整流用作速度反馈电压。 波形整形电路为交流转速计发生器的输出的每个周期产生一个脉冲。 在汽车通过减速起始点之后,计数器对这样的脉冲进行计数,从而产生与减速起始点通过之后的轿厢行驶距离成比例的计数。 从该数量的计数,通过解码器和数模转换器获得根据轿厢位置逐渐减小的减速指令电压。 在减速期间,根据速度反馈电压和减速指令电压之间的差异对轿厢驱动电动机进行反馈控制,从而进行电梯轿厢的减速控制。

    Inverter type X-ray apparatus
    7.
    发明授权
    Inverter type X-ray apparatus 失效
    变频器型X射线装置

    公开(公告)号:US4839915A

    公开(公告)日:1989-06-13

    申请号:US145715

    申请日:1988-01-15

    IPC分类号: H02M3/337 H05G1/20 H05G1/32

    摘要: In an inverter type X-ray apparatus comprising an inverter including a plurality of switching elements operated alternately to generate an AC voltage having a rectangular waveform, a high voltage transformer transforming the AC voltage of rectangular waveform into a high AC voltage, a high voltage rectifier circuit rectifying the high AC voltage into a DC voltage, and an X-ray tube to which the DC voltage is applied as a tube voltage, the switching elements are driven to make chopping operation at a frequency high than the inverter drive frequency, and a pattern signal is generated for gradually increasing the duty cycle of the chopping operation in synchronism with the timing of switching over the switching elements.

    摘要翻译: 在一种逆变器型X射线装置中,包括:反相器,包括交替操作的多个开关元件,以产生具有矩形波形的AC电压;将矩形波形的交流电压变换为高交流电压的高压变压器;高压整流器 将高交流电压整流为直流电压,将作为直流电压的X射线管作为管电压进行驱动,驱动开关元件,使其以比逆变器驱动频率高的频率进行斩波动作, 产生模式信号,以便与切换开关元件的切换时序同步地逐渐增加斩波操作的占空比。

    Power source apparatus including a plurality of output current
amplifiers connected in parallel and MRI apparatus using the same
    8.
    发明授权
    Power source apparatus including a plurality of output current amplifiers connected in parallel and MRI apparatus using the same 失效
    电源装置包括并联连接的多个输出电流放大器和使用其的MRI装置

    公开(公告)号:US5721490A

    公开(公告)日:1998-02-24

    申请号:US597959

    申请日:1996-02-07

    IPC分类号: G01R33/385 G01V3/00

    CPC分类号: G01R33/3852

    摘要: A power source apparatus distributes a current command value to be supplied to a load to a plurality of output current amplifiers connected in parallel with the load, and each of the output current amplifiers supplies an output current corresponding to the current command value so distributed. This power source apparatus prevents a circulating current between the output current amplifiers by controlling each output current amplifier so that the difference between the output current from each output current amplifier and the distributed current command value becomes zero, or by inserting current limiting devices into the output line of each output current amplifier.

    摘要翻译: 电源装置将要提供给负载的电流指令值分配给与负载并联连接的多个输出电流放大器,并且每个输出电流放大器提供与分配的当前指令值相对应的输出电流。 该电源装置通过控制每个输出电流放大器来防止输出电流放大器之间的循环电流,使得来自每个输出电流放大器的输出电流与分布电流指令值之间的差变为零,或者通过将限流装置插入输出 每路输出电流放大器。

    Resonant DC-DC converter
    9.
    发明授权
    Resonant DC-DC converter 失效
    谐振DC-DC转换器

    公开(公告)号:US4794506A

    公开(公告)日:1988-12-27

    申请号:US23239

    申请日:1987-03-09

    摘要: Disclosed is a resonant DC-DC converter which comprises an inverter for converting DC power into AC power, a rectifier connected to the AC output of the inverter through a resonant transformer for rectifying AC output power of the transformer to obtain DC power to be applied to a load, means for determining respective operation phases of a first, a second, a third and a fourth switching elements constituting the inverter in accordance with set signals indicating a voltage and a current to be supplied to the load, and a phase control circuit for controlling the respective operation phases of the first, second, third and fourth switching elements on the basis of an output signal of the phase determining means in a manner so that the first and second switching elements are alternately turned on with a phase difference of 180 degrees with respect to an operation frequency of the inverter, the third and fourth switching elements are alternately turned on with a phase difference of 180 degrees with respect to the operation frequency of the inverter, while varying a phase difference from turn-on of the first switching element to turn-on of the fourth switching element and a phase difference from turn-on of the second switching element to turn-on of the third switching element to thereby control or feed-back control the DC power to be supplied to the load.

    摘要翻译: 公开了一种谐振式DC-DC转换器,其包括用于将DC电力转换为AC电力的逆变器,通过谐振变压器连接到逆变器的AC输出的整流器,用于整流变压器的AC输出功率,以获得要施加到 负载,用于根据指示要提供给负载的电压和电流的设定信号来确定构成逆变器的第一,第二,第三和第四开关元件的各个操作相位的装置,以及相位控制电路 基于相位确定装置的输出信号控制第一,第二,第三和第四开关元件的各个操作相位,使得第一和第二开关元件以180度的相位差交替地导通 相对于逆变器的工作频率,第三和第四开关元件以180度的相位差交替地导通 相对于逆变器的工作频率,在将第一开关元件的接通与第四开关元件接通的相位差与第二开关元件的导通时相位差相对变化时, 从而控制或反馈控制要提供给负载的直流电力。

    X-ray generator with current measuring device
    10.
    发明授权
    X-ray generator with current measuring device 失效
    具有电流测量装置的X射线发生器

    公开(公告)号:US4768215A

    公开(公告)日:1988-08-30

    申请号:US863501

    申请日:1986-05-15

    CPC分类号: H01J35/165 H05G1/265

    摘要: An X-ray generator with current measuring device has an X-ray tube, a power supply unit for feeding high voltage to the X-ray tube, a high voltage cable for connecting the X-ray tube and power supply unit. The high voltage cable is comprised of a core conductor, an insulating layer surrounding the core conductor and a covered shield surrounding the insulating layer and the covered shield is disconnected near one end of the cable connected to the X-ray tube so as to be divided into a major shield portion adjacent to the power supply unit and a minor shield portion adjacent to the X-ray tube. An insulating member is provided for electrically insulating the major and minor shield portions, and a magnetic sensor sensitive to a magnetic field generated by a current flowing through the high voltage cable is positioned around the minor shield portion. The X-ray generator can measure the X-ray tube current accurately and readily under electrical insulation.

    摘要翻译: 具有电流测量装置的X射线发生器具有X射线管,用于向X射线管提供高电压的电源单元,用于连接X射线管和电源单元的高压电缆。 高压电缆包括芯导体,围绕芯导体的绝缘层和围绕绝缘层的覆盖屏蔽层,并且覆盖的屏蔽件在连接到X射线管的电缆的一端附近断开,以便被分割 与电源单元相邻的主屏蔽部分和与X射线管相邻的次屏蔽部分。 提供绝缘构件用于电绝缘主要和次要屏蔽部分,并且对流过高压电缆的电流产生的磁场敏感的磁传感器定位在次屏蔽部分周围。 X射线发生器可以在电绝缘下准确,容易地测量X射线管电流。