公开(公告)号：WO1991009456A1

公开(公告)日：1991-06-27

申请号：PCT/US1990006552

申请日：1990-11-08

Applicant: SUNDSTRAND CORPORATION

Inventor： SUNDSTRAND CORPORATION ,  DHYANCHAND, John, P. ,  PATEL, Sunil ,  NG, CHAI-NAM

IPC: H02M03/335

CPC classification number: H02M7/49

Abstract: Previously, while stepped-waveform inverters approximate a sine wave to reduce the size of the filters needed at the output of such inverters, efficient and effective methods of controlling such inverters have heretofore been lacking. In order to overcome these drawbacks, an inverter (24) for use in a variable-speed, constant-frequency power conversion system (10) of the type used in an aircraft, for example, is provided with four subinverter pairs (30, 32, 34, 36), each of which generates a respective set of waveforms. The four subinverter pairs (30, 32, 34, 46) are connected to a summing transformer (31, 33, 35, 37) having eight sets pairs of primary windings (80, 92) and eight sets of secondary windings (90, 98) coupled to the primary windings (80, 92). A regulator (50, 52) is coupled to the output of the summing transformer (31, 33, 35, 37) and varies the phase angles between the waveforms generated by the four subinverter pairs (30, 32, 34, 36) based upon the voltage and current at the output of the summing transformer (31, 33, 35, 37) in order to regulate the voltage at the output of the summing transformer (31, 33, 35, 37).

Abstract translation: 以前，阶梯波形逆变器近似正弦波以减小这种逆变器的输出所需的滤波器的尺寸，但是迄今为止，已经缺乏控制这种逆变器的有效和有效的方法。 为了克服这些缺陷，例如在用于飞行器的类型的变速恒定频率功率转换系统（10）中使用的逆变器（24）设置有四个子逆变器对（30,32） ，34,36），其中每一个产生相应的一组波形。 四个次级逆变器对（30,32,34,46）连接到具有八组初级绕组（80,92）和八组次级绕组（90,98）的求和变压器（31,33,35,37） ）耦合到初级绕组（80,92）。 调节器（50,52）耦合到求和变压器（31,33,35,37）的输出，并且基于由四个副变换器对（30,32,34,36）产生的波形之间的相位角改变，基于 为了调整求和变压器（31,33,35,37）的输出端的电压，求和变压器（31,33,35,37）输出端的电压和电流。