公开(公告)号：US06982884B1

公开(公告)日：2006-01-03

申请号：US10924122

申请日：2004-08-23

申请人： Derek Albert Paice

发明人： Derek Albert Paice

IPC分类号： H02M7/00 ,  H02M1/12

CPC分类号： H02J3/1878 ,  H01F30/02 ,  H01F30/14 ,  Y02E40/30

摘要： An 18-pulse converter is constructed using two, high zero-sequence impedance, phase-shifting autotransformers to parallel two 3-phase bridge converters. A third 3-phase bridge converter is directly connected to the power source. Depending on the DC filtering technique, the kVA rating of each autotransformer is 15 to 22% that of the DC load kW. The method facilitates paralleling of 3-phase bridge converters to reduce system AC line current harmonics, and is suitable for 18, 24, 36, and higher pulse numbers. The minimum number of individual autotransformers required is (n−1), where n is the number of 3-phase bridge converters. Due to the high zero-sequence impedance of the autotransformers, only a small DC load is needed to limit the DC output voltage. AC line reactance may be included in series with each converter, or in the 3-phase AC power source, to further reduce AC line current harmonics.

摘要翻译： 使用两个高零序阻抗，移相自耦变压器并联两个三相桥转换器构建18脉冲转换器。 第三个三相桥式转换器直接连接到电源。 根据直流滤波技术，每个自耦变压器的kVA额定值为直流负载kW的15％至22％。 该方法有助于并联三相桥式变换器，以减少系统的交流线电流谐波，适用于18,24,36和更高的脉冲数。 所需的单个自耦变压器的最小数量为（n-1），其中n为三相桥式变流器的数量。 由于自耦变压器的零序阻抗很高，因此只需要较小的直流负载来限制直流输出电压。 交流线路电抗可以与每个转换器或三相交流电源串联，以进一步减少交流线路电流谐波。

公开(公告)号：US20160126857A1

公开(公告)日：2016-05-05

申请号：US14531148

申请日：2014-11-03

申请人： Derek Albert Paice

发明人： Derek Albert Paice

IPC分类号： H02M7/06

CPC分类号： H02M7/08 ,  H02M5/14

摘要： A new wye-type autotransformer topology provides readily designed phase shift and voltage ratios, including an exact 30° phase shift. It requires only three windings per phase and can be implemented with a wide range of integer turns, such that both high and low power ratings are feasible. An appropriate magnetic structure is used to provide high zero sequence impedance, thereby obviating the need for zero-sequence blocking transformers.Using two mechanically identical units the new autotransformer is uniquely suited to provide balanced power supplies for 12-pulse AC to DC converters with capacitive, inductive, or resistive DC load circuit. The resulting 12-pulse current waveforms contain very small residual 5th and 7th harmonics. Single or multiple units provide a cost effective means to increase the effective pulse number and reduce harmonic distortion in AC to DC power converters.

摘要翻译： 新型的叶片型自耦变压器拓扑提供了易于设计的相移和电压比，包括精确的30°相移。 每相只需要三个绕组，并且可以实现宽范围的整数匝，使得高和低功率额定值都是可行的。 使用适当的磁结构来提供高零序阻抗，从而避免了对零序阻塞变压器的需要。 使用两个机械相同的单元，新的自耦变压器特别适合为具有电容，电感或电阻直流负载电路的12脉冲AC至DC转换器提供平衡电源。 所产生的12脉冲电流波形包含非常小的残余的第5和第7次谐波。 单个或多个单元提供了增加有效脉冲数并降低AC到DC电力转换器中的谐波失真的成本效益的手段。

公开(公告)号：US07750782B1

公开(公告)日：2010-07-06

申请号：US12378796

申请日：2009-02-20

申请人： Derek Albert Paice

发明人： Derek Albert Paice

IPC分类号： H01F30/12

CPC分类号： H01F30/14 ,  H01F27/385 ,  H02M5/14

摘要： A polygon connected three-phase autotransformer using six windings per phase provides a reduced power rating nine-phase power source suitable for 18-pulse AC to DC power converters. The windings are selected and connected in a manner that controls harmonic currents and minimizes total kVA rating. When the autotransformer is used to power a nine-phase AC to DC converter its kVA rating is typically less than 48% of the DC load kW. Additional isolated windings can provide means for the invention to operate as an efficient double-wound transformer.

摘要翻译： 每相使用六个绕组的三相自耦变压器连接的多边形提供了适用于18脉冲AC至DC电源转换器的降低功率的九相电源。 绕组被选择和连接，以控制谐波电流并最小化总kVA额定值。 当使用自耦变压器为九相AC至DC转换器供电时，其kVA额定值通常小于直流负载kW的48％。 附加的隔离绕组可以提供用于本发明作为高效双绕组变压器工作的装置。

公开(公告)号：US07719858B1

公开(公告)日：2010-05-18

申请号：US12387440

申请日：2009-05-04

申请人： Derek Albert Paice

发明人： Derek Albert Paice

IPC分类号： H02M7/48

CPC分类号： H02M7/068 ,  H01F30/02 ,  H01F30/14

摘要： A polygon connected three-phase autotransformer using nine windings per phase provides a reduced power rating fifteen-phase power source suitable for 30-pulse AC to DC power converters. The windings are selected and connected in a manner that accommodates zero-sequence currents, such as the third harmonic, and minimizes total kVA rating. When the autotransformer is used to power a 15-phase AC to DC converter its kVA rating is typically less than 51% of the DC load kW. AC line current distortion is negligible and can satisfy the most exacting practical harmonic specifications. Additional isolated windings can provide means for the invention to operate as an efficient double-wound transformer.

摘要翻译： 每相使用九个绕组的三相自耦变压器连接的多边形提供了适用于30脉冲AC到DC电源转换器的降低额定功率的十五相电源。 选择并连接绕组，以适应诸如三次谐波之类的零序电流，并使总额定kVA最小化。 当自耦变压器用于为15相AC至DC转换器供电时，其kVA额定值通常小于直流负载kW的51％。 交流线路电流畸变可忽略不计，可以满足最严格的实用谐波规格。 附加的隔离绕组可以提供用于本发明作为高效双绕组变压器工作的装置。

公开(公告)号：US06525951B1

公开(公告)日：2003-02-25

申请号：US10054785

申请日：2002-01-25

申请人： Derek Albert Paice

发明人： Derek Albert Paice

IPC分类号： H02M500

CPC分类号： H01F30/14 ,  H02M5/14

摘要： In an 18-pulse converter system a three-phase to nine-phase auto-transformer with multiple windings per phase is used to power a nine-phase AC to DC converter. The transformer kVA rating is about 55% of the DC load kW. The basic topology is that of a wye connection, but an active delta path is added to allow circulation of the third harmonics necessary for proper operation. The design requires substantially fewer coils than other three-phase to nine-phase auto-transformers. The voltage ratio can be selected so as to give an average DC output from an 18-pulse converter which is generally the same as that of a conventional three-phase bridge rectifier without a transformer. However, the topology described is also suitable for step up or step down of voltage as required. Where necessary to further reduce high frequency harmonic currents, a three-phase ac line reactor may be connected in series with the source of ac power.

摘要翻译： 在18脉冲转换器系统中，每相具有多个绕组的三相到九相自耦变压器用于为九相交直流转换器供电。 变压器kVA额定值约为直流负载kW的55％。 基本的拓扑结构是与Y形连接的拓扑，但增加了一个有效的三角形路径，以便循环正确操作所需的三次谐波。 该设计需要比其他三相到九相自动变压器更少的线圈。 可以选择电压比，以便从没有变压器的常规三相桥式整流器的18脉冲转换器得到平均DC输出。 然而，所描述的拓扑结构也适合于根据需要升压或降压。 在需要进一步减少高频谐波电流的情况下，三相交流电抗器可以与交流电源串联。

公开(公告)号：US07274280B1

公开(公告)日：2007-09-25

申请号：US11436133

申请日：2006-05-18

申请人： Derek Albert Paice

发明人： Derek Albert Paice

IPC分类号： H02M5/00 ,  H02M5/06 ,  H01F21/02

CPC分类号： H01F30/14 ,  H02M5/14

摘要： An irregular polygon connection of a three-phase autotransformer using only five windings per phase provides a source of nine-phase power suitable for an 18-pulse AC to DC power converter. The windings are connected in a manner to limit the amount of third harmonic current circulating in them. When the autotransformer is used to power a nine-phase AC to DC converter its kVA rating is typically less than 50% of the DC load kW. An additional tap on one of the five windings allows a wide range of AC output voltages to be obtained. Voltages greater than, less than, or equal to the AC input voltage can be obtained. Other multi-phase outputs are feasible. Additional isolated windings can provide means for the invention to operate as an efficient double-wound transformer.

摘要翻译： 每相仅使用五个绕组的三相自耦变压器的不规则多边形连接提供适用于18脉冲AC至DC功率转换器的九相电源。 绕组以限制其中循环的三次谐波电流的量的方式连接。 当使用自耦变压器为九相交流直流变换器供电时，其kVA额定值通常小于直流负载kW的50％。 五个绕组中的一个上的附加抽头允许获得宽范围的交流输出电压。 可以获得大于，小于或等于AC输入电压的电压。 其他多相输出是可行的。 附加的隔离绕组可以提供用于本发明作为高效双绕组变压器工作的装置。

公开(公告)号：US07233506B1

公开(公告)日：2007-06-19

申请号：US11395750

申请日：2006-04-03

申请人： Derek Albert Paice

发明人： Derek Albert Paice

IPC分类号： H02M7/155

CPC分类号： H02M7/043

摘要： A polygon connected autotransformer in conjunction with zero sequence blocking inductor(s) enables multipulse AC to DC converters to use lower kVA parts rating by using appropriate phase-shifted voltage sets in conjunction with inductors that extend the conduction period and reduce rms current. Also, lower harmonic voltages in the transformer facilitate use of lower performance magnetic steel. Designs for 12, 18, and 24-pulse use the same conceptual approach. Very efficient high power ratings are feasible. Means are given to limit the maximum no-load DC output voltage. A technique is disclosed that reduces the size of polygon transformers supplying loads with substantial third harmonic.

摘要翻译： 连接自耦变压器的多边形与零序阻塞电感一起使多脉冲交流至直流转换器能够通过使用适当的相移电压组以及延长导通周期并降低均方根电流的电感器来使用较低的kVA零件额定值。 此外，变压器中的低次谐波电压有利于使用较低性能的磁钢。 12,18和24脉冲的设计采用相同的概念方法。 非常高效的高功率额定值是可行的。 给出了限制最大空载直流输出电压的方法。 公开了一种技术，其减少了提供具有实质三次谐波的负载的多边形变压器的尺寸。