公开(公告)号：US5383107A

公开(公告)日：1995-01-17

申请号：US973119

申请日：1992-11-06

申请人： Christopher E. Hopkins ,  Albert L. Markunas ,  Vijay K. Maddali ,  Richard A. Arbanella

发明人： Christopher E. Hopkins ,  Albert L. Markunas ,  Vijay K. Maddali ,  Richard A. Arbanella

IPC分类号： H02M1/12 ,  H02M7/5395

CPC分类号： H02M1/12 ,  H02M7/5395

摘要： A control unit for an inverter determines an objective function based upon harmonic content in a minimum number of the phase-to-phase AC voltages produced by the inverter and controls the switches of the inverter so as to minimize the objective function to thus control the harmonic content in the inverter output voltages.The objective function may be defined according to the following equation: ##EQU1## where W.sub.k are scaler weighting factors, A.sub.kA, A.sub.kB and A.sub.kC are the Fourier cosine coefficients of the kth harmonic of the inverter phase A, B and C outputs, B.sub.kA, B.sub.kB and B.sub.kC are the Fourier sine coefficients of the kth harmonic of the inverter phase A, B and C outputs, k is the number of the controlled odd harmonic (i.e., k=1, 3, 5 . . . ), and NHARM is the number of the highest controlled odd harmonic.

摘要翻译： 逆变器的控制单元基于由逆变器产生的最小数量的相间AC电压中的谐波含量来确定目标函数，并且控制逆变器的开关以最小化目标函数从而控制谐波 变频器输出电压内容。 目标函数可以根据以下等式定义：AC）2 + + TR（BkA-BkC-HBkAC）2}; 其中Wk是缩放加权因子，AkA，AkB和AkC是逆变器相位A，B和C输出的第k次谐波的傅里叶余弦系数，BkA，BkB和BkC是逆变器相位的第k次谐波的傅里叶正弦系数 A，B和C输出，k是受控奇次谐波的数量（即k = 1,3,5 ...），并且NHARM是最高受控奇次谐波的数量。

公开(公告)号：US5177460A

公开(公告)日：1993-01-05

申请号：US460997

申请日：1990-01-04

申请人： P. John Dhyanchand ,  Richard A. Arbanella ,  Raghunath G. Mokadam

发明人： P. John Dhyanchand ,  Richard A. Arbanella ,  Raghunath G. Mokadam

IPC分类号： H01F30/12 ,  H02M7/48 ,  H02M7/49

CPC分类号： H02M7/49 ,  H01F30/12

摘要： A summing transformer for a star-delta inverter having a single secondary winding for each group of primary windings for use in inverting variable frequency AC power into constant frequency AC power, the transformer comprising a plurality of core elements having principal legs on which primary windings are wound and secondary legs extending from said principal legs establishing flux paths, the legs of each core element defining apertures through which a single winding is magnetically linked to a group of primary windings.

摘要翻译： 一种用于每个初级绕组的单个次级绕组的用于将可变频率AC电力反相转换为恒定频率AC电力的星形 - 三角波逆变器的求和变压器，所述变压器包括多个芯体元件，所述多个芯元件具有初级绕组 缠绕和次级腿从所述主腿延伸建立通路，每个芯元件的腿限定孔，单个绕组通过该孔与一组初级绕组磁连接。