公开(公告)号：US20070153890A1

公开(公告)日：2007-07-05

申请号：US11634131

申请日：2006-12-04

申请人： Norbert Huber ,  Franz Ritz ,  Hans Lengenfelder

发明人： Norbert Huber ,  Franz Ritz ,  Hans Lengenfelder

IPC分类号： H03K7/08

CPC分类号： H02M7/5395

摘要： A method is for the pulse width modified control of switching elements in a frequency converter having N phases, in which for each phase the control pulses of the switching elements are derived from, in each case, one P-periodic control voltage. The P-periodic control voltages correspond to a superposition of sinusoidal control voltages of period P, that are shifted by 360/N degrees with respect to one another, by an N*P-periodic offset voltage that applies to all phases. The offset voltage is selected such that, at any time, exactly one of the P-periodic control voltages lies effectively on a modulating limit for the derivation of the switching pulses. Using this method, the excitation of resonances at the star point of a connected load may be clearly reduced.

摘要翻译： 一种用于在具有N相的频率转换器中的开关元件的脉冲宽度修改控制的方法，其中对于每相，开关元件的控制脉冲在每种情况下都衍生自一个P周期性控制电压。 P周期性控制电压对应于周期P的正弦控制电压的叠加，其相对于彼此移位360 / N度，通过适用于所有相的N * P周期性偏移电压。 选择偏移电压使得在任何时候，正周期性控制电压中的仅一个有效地落在用于导出开关脉冲的调制限制上。 使用这种方法，可以明显地减少连接负载的星点处的谐振的激发。

公开(公告)号：US5066953A

公开(公告)日：1991-11-19

申请号：US432587

申请日：1989-11-07

申请人： Hans Lengenfelder ,  Robert Wasthuber

发明人： Hans Lengenfelder ,  Robert Wasthuber

IPC分类号： G01D5/36 ,  G01B21/00 ,  G01D5/244 ,  G01D5/245 ,  H03M1/20 ,  H03M1/30 ,  H03M1/64

CPC分类号： H03M1/203 ,  G01D5/24404 ,  H03M1/303

摘要： In a position measuring apparatus there is provided a subdivision circuit for the subdividing of sinusoidal scanning signals. The subdivision circuit includes rectifier circuits in which the scanning signals are reformed in such a way that over a total signal period one rectified signal always has a greater signal value than the other rectified signal. The rectified signal with the greater signal value lies on one reference input and the other rectified signal lies on the other reference input of an analog-to-digital converter. The analog-to-digital converter forms from these rectified signals a binary word which is fed to a correction arrangement. Together with code signals which define four equal sections of a single period, the correction arrangement generates a data word which represents intermediate values of a signal period of the scanning signals.

摘要翻译： 在位置测量装置中，提供了用于细分正弦扫描信号的细分电路。 细分电路包括其中扫描信号被重整的整流电路，使得在整个信号周期中，一个整流信号总是具有比其它整流信号更大的信号值。 具有较大信号值的整流信号位于一个参考输入端，另一个整流信号位于模数转换器的另一个参考输入端。 模数转换器从这些整流信号中形成馈送到校正装置的二进制字。 与定义单个周期的四个相等部分的代码信号一起，校正装置产生表示扫描信号的信号周期的中间值的数据字。

公开(公告)号：US07031799B2

公开(公告)日：2006-04-18

申请号：US10757376

申请日：2004-01-14

申请人： Norbert Kerner ,  Hans Lengenfelder

发明人： Norbert Kerner ,  Hans Lengenfelder

IPC分类号： G06F19/00 ,  G05B13/00

CPC分类号： G05B5/01 ,  F16F15/02 ,  G05B13/021 ,  G05B19/404 ,  G05B2219/42034 ,  G05B2219/49048

摘要： A control structure for the active damping of low-frequency oscillations in numerically-controlled machine tools. The control structure includes an rpm regulator having a proportional component and an integral component. The control structure further includes an active damping element that forms a low-frequency correction signal, which is phase-shifted with respect to an interfering low-frequency oscillation and free of d.c. components, and a summing point that is upstream or downstream of the integral component and receives the low-frequency correction signal.

摘要翻译： 用于数控机床中低频振荡主动阻尼的控制结构。 控制结构包括具有比例分量和积分分量的转速调节器。 该控制结构还包括一个主动阻尼元件，该有源阻尼元件形成低频校正信号，该低频校正信号相对于干扰低频振荡是相移的，没有直流校正信号。 以及在积分分量的上游或下游并且接收低频校正信号的求和点。