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    Method and apparatus for controlling the load current of a pulsed frequency converter
    1.
    发明授权
    Method and apparatus for controlling the load current of a pulsed frequency converter 失效
    用于控制脉冲变频器的负载电流的方法和装置

    公开(公告)号：US4488215A

    公开(公告)日：1984-12-11

    申请号：US399250

    申请日：1982-07-19

    申请人： Gerhard Pfaff ,  Albert Wick

    发明人： Gerhard Pfaff ,  Albert Wick

    IPC分类号： H02P27/06 ,  H02M7/529 ,  H02M5/25

    CPC分类号： H02M7/529

    摘要： A system for forming address signals which address respective converter switches in a frequency converter. The frequency converter is of the type wherein a DC voltage is provided for supplying electrical energy to phase outputs thereof in response to the states of the converter switches. In accordance with the invention, the phase output voltages, phase output currents, and predetermined desired phase currents are treated as space vectors from which are generated control difference space vectors. In one embodiment, a trigger pulse is generated externally and may be suppressed when the control difference vector has a value which is below a preselected tolerance limit. In a further embodiment, the trigger pulse is generated internally and is suppressed if the tolerance limit is exceeded. Upon the occurrence of each trigger pulse, a voltage space vector is addressed having a direction which is opposite to the control difference space vector. Such an oppositely directed space vector produces a fast reduction of the control difference. In a preferred embodiment, the discrete voltage space vectors are selected in accordance with the sign of the control difference. Thus, the particular space vector which is closest to the vectorial difference between the desired and actual load current vectors is selected. In further embodiments, the addressing signals may be formed so as to cause the phase outputs of the frequency converter to short circuit at a selectable one of the DC input terminals thereof.

    摘要翻译： 一种用于形成地址信号的系统，其用于解决变频器中的各个转换器开关。 变频器是其中提供DC电压以响应于转换器开关的状态向其相位输出提供电能的类型。 根据本发明，相位输出电压，相输出电流和预定的期望相电流被视为产生控制差空间矢量的空间矢量。 在一个实施例中，触发脉冲在外部产生，并且当控制差矢量具有低于预选公差极限的值时可被抑制。 在另一个实施例中，触发脉冲在内部产生并且如果超过公差极限则被抑制。 在发生每个触发脉冲时，寻址具有与控制差空间矢量相反的方向的电压空间矢量。 这种相对定向的空间矢量产生控制差的快速减少。 在优选实施例中，根据控制差异的符号选择离散电压空间矢量。 因此，选择最接近期望负载电流矢量与实际负载电流矢量之间的矢量差的特定空间矢量。 在另外的实施例中，寻址信号可以形成为使得变频器的相位输出在其可选择的一个DC输入端子处短路。

    Method and apparatus for controlling a pulsed frequency converter
    2.
    发明授权
    Method and apparatus for controlling a pulsed frequency converter 失效
    用于控制脉冲变频器的方法和装置

    公开(公告)号：US4480301A

    公开(公告)日：1984-10-30

    申请号：US399249

    申请日：1982-07-19

    申请人： Gerhard Pfaff ,  Albert Wick

    发明人： Gerhard Pfaff ,  Albert Wick

    IPC分类号： H02P21/00 ,  H02M7/529 ,  H02P27/04 ,  H02M7/515

    CPC分类号： H02M7/529

    摘要： A system for forming addressing signals for addressing respective converter switches of a frequency converter; the frequency converter being of the type which is provided with DC input terminals for receiving electrical energy which is conducted to phase output terminals when the converter switches are operated in response to the addressing signals. Each of the combinations of converter switches is associated with a discrete space vector, and a load voltage vector is determined. In operation, two of the discrete space vectors which are adjacent to the voltage space vector are addressed for respective dwell times which correspond to the components of the voltage space vector as impressed upon the adjacent discrete space vectors. Either prior to or after the addressing of the adjacent discrete space vectors within a switching cycle, a short circuit state is addressed. In one embodiment, the order in which the adjacent discrete space vectors are addressed is reversed for each subsequent switching cycle. Also, the DC input terminals to which the phase outputs are short circuited are alternated.

    摘要翻译： 一种用于形成用于寻址变频器的各个转换器开关的寻址信号的系统; 所述变频器是具有用于接收电能的类型的变频器，所述DC输入端子响应于所述寻址信号而在所述转换器开关被操作时被传导到相输出端子。 转换器开关的每个组合与离散空间矢量相关联，并且确定负载电压矢量。 在操作中，与电压空间矢量相邻的两个离散空间矢量被寻址用于相应的驻留时间，这些驻留时间对应于施加在相邻离散空间矢量上的电压空间矢量的分量。 在切换周期内对相邻离散空间矢量寻址之前或之后，寻址短路状态。 在一个实施例中，对于每个后续切换周期，相邻离散空间矢量的寻址顺序是相反的。 此外，相位输出短路的直流输入端子交替。