公开(公告)号：US5050059A

公开(公告)日：1991-09-17

申请号：US393665

申请日：1989-08-14

申请人： Gerhard Neeser ,  Jens Hamann

发明人： Gerhard Neeser ,  Jens Hamann

IPC分类号： H02M5/44 ,  H02M5/45

CPC分类号： H02M5/44 ,  H02M5/4505

摘要： A frequency changer having parallel partial frequency changers with a dc circuit has chokes that impress dc currents. These chokes are magnetically coupled to each other such that the change of a dc current in one of the partial frequency changers causes a corresponding change of the dc currents in the parallel partial frequency changer in the sense of a lead control. In a frequency changer constructed with an even number of partial frequency changers, the individual chokes can be coupled such that the magnetic dc fluxes in the coupling caused by the dc currents in the chokes are compensated.

摘要翻译： 具有直流电路的并联部分变频器的变频器具有压直直流电流的扼流圈。 这些扼流圈彼此磁耦合，使得部分变频器之一中的直流电流的变化在引导控制的意义上导致并联的部分变频器中的直流电流的相应变化。 在由偶数个部分变频器构成的变频器中，各个扼流圈可以被耦合，使得由扼流圈中的直流电流引起的耦合引起的磁直流通量被补偿。

公开(公告)号：US5006775A

公开(公告)日：1991-04-09

申请号：US258826

申请日：1988-10-17

申请人： Jens Hamann ,  Hartmut Vogt

发明人： Jens Hamann ,  Hartmut Vogt

IPC分类号： H02P27/06 ,  H02P6/12 ,  H02P25/024 ,  H02P25/03

CPC分类号： H02P25/03 ,  H02P25/024

摘要： A method and apparatus for preventing a current collapse in a phase not participating in the commutation, of a three-phase block current supplied synchronous machine, while the phase currents of the other two phases are being commutated. A control voltage controlling the synchronous machine is acted upon during the commutation of two phase currents by an additional control voltage such that the average of current drop in the down-commutating phase is equal to the average of the negative current rise in the up-commutating phase. Thus, a method and a circuit arrangement for carrying out this method are obtained with which the torque oscillations of a three-phase-feed drive can be reduced substantially.

摘要翻译： 一种用于在三相块电流供给的同步电机中防止不参与换向的相位中的电流塌陷的方法和装置，同时其它两相的相电流正在换向。 控制同步电机的控制电压通过附加的控制电压在两相电流的换向期间起作用，使得下变换相中的电流降的平均值等于上升换流中的负电流上升的平均值 相。 因此，可以获得用于执行该方法的方法和电路装置，通过该方法和电路装置可以显着降低三相馈电驱动器的转矩振荡。