Thyristor control apparatus
    1.
    发明授权
    Thyristor control apparatus 失效
    THYRISTOR控制装置

    公开(公告)号:US4039866A

    公开(公告)日:1977-08-02

    申请号:US663864

    申请日:1976-03-04

    CPC分类号: H03K17/0403 H03K17/723

    摘要: A magnetic phase shifter utilizing the principle of magnetic amplifier is used as a phase shifter for applying a firing signal to a main thyristor. In order to amplify and sharpen the rise of the output pulse of the magnetic phase shifter, an auxiliary thyristor is fired by the output pulse of the magnetic phase shifter. The gate-cathode circuit of the main thyristor is connected to the auxiliary thyristor as a load thereof. Power for the auxiliary thyristor is obtained from an AC power supply which is in phase with the main thyristor through a transformer, while power for the magnetic phase shifter is introduced from an intermediate tap of the secondary winding of the transformer, thus making the magnetic phase shifter compact as well as low in cost.

    AC Elevator control system
    4.
    发明授权
    AC Elevator control system 失效
    交流电梯控制系统

    公开(公告)号:US4319665A

    公开(公告)日:1982-03-16

    申请号:US147046

    申请日:1980-05-06

    CPC分类号: B66B1/285 B66B1/308

    摘要: A control system for an AC elevator system in which an actual speed of an elevator car is compared with a speed command and control is made so that deviation between the actual speed and the commanded speed becomes zero. The speed command is so composed that deceleration of the elevator car is gradually decreased as the car approaches to a target landing position in the stopping operation of the elevator. A motoring torque or a braking torque is additionally generated in dependence on a load on the car in a region close to the target landing position.

    摘要翻译: 将电梯轿厢的实际速度与速度指令和控制进行比较的交流电梯系统的控制系统,使得实际速度和指令速度之间的偏差变为零。 速度指令是这样组成的,即在电梯的停止操作中轿厢接近目标着陆位置时,电梯轿厢的减速逐渐减小。 根据靠近目标着陆位置的区域中的轿厢上的负载另外产生电动转矩或制动转矩。

    Method and apparatus for detecting elevator car position
    6.
    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。

    Apparatus for compensating reactive power by current-source type
converter
    8.
    发明授权
    Apparatus for compensating reactive power by current-source type converter 失效
    用于通过电流源型转换器补偿无功功率的装置

    公开(公告)号:US4780660A

    公开(公告)日:1988-10-25

    申请号:US101021

    申请日:1987-09-25

    IPC分类号: G01R19/06 G05F1/70

    CPC分类号: G01R19/06

    摘要: A first apparatus for determining instantaneous reactive currents to determine instantaneous reactive currents in every phase of a three-phase load. Three phase current signals corresponding, respectively, to phase currents of the three-phase load supplied from a three-phase power-supply source are multiplied with sinusoidal wave signals of three phases, each of which has a phase difference of 90.degree. relative to the corresponding phase voltage of the three-phase power supply source to obtain the products for three phase, respectively, which products are added together to produce a sum signal. The instantaneous reactive currents mentioned above are determined on the basis of the sum signal and the three phase sinusoidal wave signals. A second apparatus for compensating the reactive power of the three-phase load by means of a converter load circuit including a current-source type three phase converter connected in parallel with the three-phase load by making use of the instantaneous reactive currents of the three-phase load determined by the first mentioned apparatus.

    摘要翻译: 用于确定瞬时无功​​电流以确定三相负载的每个相中的瞬时无功电流的第一装置。 分别对应于从三相电源供给的三相负载的相电流的三相电流信号与三相正弦波信号相乘,每相具有相对于相位差为90度的相位差 三相电源的对应相电压分别获得三相产品,将这些产品相加在一起产生和信号。 上述瞬时无功电流基于和信号和三相正弦波信号来确定。 一种用于通过转换器负载电路来补偿三相负载的无功功率的第二装置,所述转换器负载电路包括利用三相负载的瞬时无功电流与三相负载并联连接的电流源型三相转换器 由第一个提到的设备确定的相位负载。

    Controller for elevator
    9.
    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。

    Power converter with current-type inverter
    10.
    发明授权
    Power converter with current-type inverter 失效
    电流转换器与电流型逆变器

    公开(公告)号:US5155671A

    公开(公告)日:1992-10-13

    申请号:US490466

    申请日:1990-03-08

    IPC分类号: H02M5/458 H02M7/48 H02P27/06

    CPC分类号: H02M5/4585

    摘要: A power converter comprising a current-type inverter is disclosed, in which an output of a converter unit is applied as an input to the inverter unit through a DC reactor, and AC power is supplied to a load from the inverter unit. A ripple component of the DC input of the inverter unit is detected, and the switching elements of the inverter unit are controlled by modulation rate if they are to be subjected to PWM control, thus completing a sinusoidal waveform of the output of the inverter unit. Specifically, since the input to the inverter unit is allowed to contain a ripple, the DC reactor is reduced in size. The output of the inverter unit is a sinusoidal AC power containing no high harmonics and therefore the load is free of effects of high harmonics.

    摘要翻译: 公开了一种包括电流型逆变器的电力转换器,其中通过直流电抗器将转换器单元的输出作为输入施加到逆变器单元,并且将来自逆变器单元的负载提供给交流电力。 检测逆变器单元的直流输入的纹波分量,并且如果要进行PWM控制,则逆变器单元的开关元件由调制率控制,从而完成逆变器单元的输出的正弦波形。 具体地,由于允许逆变器单元的输入包含纹波,因此直流电抗器的尺寸减小。 逆变器单元的输出是不包含高次谐波的正弦交流电,因此负载不受高次谐波的影响。