Power converter with current-type inverter
    2.
    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。

    Apparatus and method for controlling switching elements in a
PWN-controlled voltage source inverter
    4.
    发明授权
    Apparatus and method for controlling switching elements in a PWN-controlled voltage source inverter 失效
    用于控制PWN控制的电压源逆变器中的开关元件的装置和方法

    公开(公告)号:US4924373A

    公开(公告)日:1990-05-08

    申请号:US298962

    申请日:1989-01-19

    摘要: Disclosed is an apparatus and method for controlling switching elements (51-56) of a PWM-controlled value type inverter by a software program using a microcomputer (10). The control apparatus of the present invention produces a switching element control signal (an on/off signal) according to the following steps. When a control command value commanding the output of the inverter is determined, a control mode corresponding to the commanded output value is selected from among a plurality of control modes (M1-M6) previously contained in a table to determine the switching elements to which the control signal is applied and the order of controlling the switching elements. Further, on the basis of the control command value, the difference between a modulation signal and a predetermined reference value is computed for each phase to determine the timing of controlling the switching elements. The unit control period of each control mode is divided into halves, and the switching element control timing is determined in each of the halves of the unit control period. The control signal is produced on the basis of the combination of the selected control mode and the determined control timing.

    摘要翻译: 公开了一种通过使用微型计算机(10)的软件程序来控制PWM控制值型逆变器的开关元件(51-56)的装置和方法。 本发明的控制装置根据以下步骤产生开关元件控制信号(开/关信号)。 当确定指示反相器的输出的控制指令值时,从先前包含在表中的多个控制模式(M1-M6)中选择与指令输出值对应的控制模式,以确定转换元件 施加控制信号和控制开关元件的顺序。 此外,基于控制指令值,针对每个相位计算调制信号和预定基准值之间的差以确定控制开关元件的时序。 每个控制模式的单位控制周期被分成两半,并且在单位控制周期的每一半的每一个中确定开关元件控制定时。 基于所选择的控制模式和确定的控制定时的组合来产生控制信号。

    Group control elevator system for automatically adjusting elevator
operation based on a evaluation function
    6.
    发明授权
    Group control elevator system for automatically adjusting elevator operation based on a evaluation function 失效
    组控电梯系统,用于根据评估功能自动调整电梯运行

    公开(公告)号:US5409085A

    公开(公告)日:1995-04-25

    申请号:US156980

    申请日:1993-11-24

    IPC分类号: B66B1/20 B66B1/18 B66B1/24

    摘要: The present invention relates to a group control elevator system which has been adjusted to operate in response to a state of utilizing elevator cars. In a group control elevator system which carries out a control of allocating elevator cars to elevator car calls for serving many floors by using an evaluation function having a plurality of variable parameters, targets for elevator control performance are inputted, a traffic flow to which elevator car demand belongs is judged, variable parameters to be adjusted which have been set in advance for each combination of said targets and traffic flows are stored, stored variable parameters are adjusted, adjustment sequence of variable parameters to be adjusted is stored, and a plurality of variable parameters are sequentially adjusted according to the stored sequence. By the above arrangement, only desired parameters to be adjusted are selected and adjusted out of a plurality of variable parameters for desired targets and traffic flows. Accordingly, an increase in time required for adjustment can be restricted even if there has been an increase in the number of variable parameters to be adjusted.

    摘要翻译: 本发明涉及一种已经被调整为响应于利用电梯轿厢的状态而操作的组控制电梯系统。 在通过使用具有多个可变参数的评价函数来执行将电梯轿厢分配给用于服务多层的电梯轿厢呼叫的控制的组控制电梯系统中,输入电梯控制性能的目标,电梯轿厢 对所要求的属性进行判断,对于所述目标和交通流量的每个组合预先设定的要调整的可变参数被存储,存储可变参数,存储可调参数的调整顺序和多个变量 根据存储的顺序依次调整参数。 通过上述布置,仅针对期望的目标和业务流量从多个可变参数中选择和调整要调整的期望参数。 因此,即使调整的可变参数的数量增加,也可以限制调整所需的时间的增加。