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公开(公告)号：US4791340A
公开(公告)日：1988-12-13
申请号：US044460
申请日：1987-03-27
Applicant: David Finney
Inventor： David Finney
CPC classification number: H02P27/06 , H02M5/4505 , H02P2201/03 , H02P2209/01
Abstract: A self-excited induction motor variable speed drive using a known self-excitation method in which a capacitor is connected in parallel with the motor. Power is supplied by a supply convertor, a D.C. link and a motor convertor, the latter running at the motor frequency. The motor convertor includes a current bypass switching circuit comprising a capacitor bank connected to the motor terminals and to a neutral point between a pair of thyristors connected across the D.C. link.
Abstract translation: PCT No.PCT / GB86 / 00456 Sec。 371日期1987年3月27日 102（e）1987年3月27日PCT申请日1986年7月31日PCT公布。 公开号WO87 / 00992 日期1987年2月12日。一种使用已知的自激方法的自激感应电动机变速驱动器，其中电容器与电动机并联连接。 电源由电源转换器，直流电源和电机转换器供电，后者以电机频率运行。 电动机转换器包括电流旁路开关电路，其包括连接到电动机端子的电容器组和跨过直流连接器连接的一对晶闸管之间的中性点。
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公开(公告)号：US4460950A
公开(公告)日：1984-07-17
申请号：US433251
申请日：1982-10-07
Applicant: David Finney
Inventor： David Finney
CPC classification number: H02M7/49
Abstract: A rectifier system in which the harmonic content of the A.C. current is reduced in a particularly efficient manner. Two or more 3-phase thyristor bridges are connected in parallel to the A.C. supply, and to the DC output by way of interphase-transformers. For the positive thyristors, and for the negative thyristors separately, the conduction transitions within each bridge are staggered from one bridge to the next so that the total conduction on each phase follows a stepped characteristic approaching a sine wave and thus having a smaller harmonic content than a comparable arrangement having uniform firing angles from bridge to bridge.
Abstract translation: 一种整流系统，其中以特别有效的方式降低交流电流的谐波含量。 两个或多个三相晶闸管桥连接到交流电源并通过相间变压器连接到直流输出端。 对于正晶闸管和负晶闸管，分别地，每个桥中的导通跃迁从一个桥交错到下一个桥，使得每相上的总导通跟随接近正弦波的阶梯特性，因此具有比谐波含量更小的谐波含量 具有从桥到桥具有均匀起火角的类似装置。
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