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    • 113. 发明授权
    • Electrical inverter-rectifier circuit and inductor apparatus therefor
    • 电子逆变器整流器电路及其电感器装置
    • US3745440A
    • 1973-07-10
    • US3745440D
    • 1972-02-28
    • LITTON SYSTEMS INC
    • LORD H
    • H01F27/28H01F27/38H01F37/00H01F38/06H02M3/337H02M7/06H02M7/10H02M7/00
    • H02M3/337H01F27/385H01F38/06H01F2038/026H02M7/068H02M7/10
    • The disclosed invention converts a square wave alternating voltage of relatively low voltage to a high direct voltage and is used as part of a conventional DC to DC voltage converter such as is found in electronic inverter/rectified regulated voltage power supply systems. An input transformer contains a primary winding and a plurality of separate secondary windings, such as four in one example. Each of the secondary windings is a single layer and all have the same number of turns. The secondary windings are electrically isolated and are wound one atop the other with their positive polarity ends facing the same direction in order to derive concurrently a plurality of equal AC voltages from the transformation of a voltage applied to the primary winding. The output of each of the secondary windings is rectified in a corresponding one of a plurality of rectifiers associated with the secondary windings into a plurality of equal DC voltages. These voltages are then added together in series or ''''summed'''' to provide the desired DC output power. A capacitor network which contains a plurality of capacitors, for example four, corresponding in number to the secondary windings, connected in series and the voltages from a corresponding rectifier is coupled in additive polarity across a corresponding one of the capacitors to provide the voltage ''''summing''''. In an improvement a plurality of inductors are employed with each one of said inductors placed in series with each corresponding ones of the output leads of each rectifier assembly so as to form with the capacitors an L-C circuit and thereby minimize the ripple voltage of the output power to the load. A novel multi-section inductor assembly having minimal distributed capacitance is utilized for said plurality of inductors and comprises a plurality of individual windings, divided into two groups each of which is insulated from one another, is of substantially equal number of turns, is of a single layer, is oriented with the windings in phase and wound upon a common nonsaturating magnetic core or lamination. Other than the first winding in one group and last winding in the second group the negative polarity ends of the winding in one group are connected electrically in common with the positive polarity ends of corresponding windings in the second group of windings.
    • 114. 发明授权
    • Anti-harmonic transformer
    • 抗谐波变压器
    • US3671901A
    • 1972-06-20
    • US3671901D
    • 1971-01-18
    • JACQUES FRANCOIS MARIE JOSEPH
    • LYS JACQUES FRANCOIS MARIE-JOS
    • H01F27/34H01F27/38H01F33/00
    • H01F27/34H01F27/385
    • Devices for eliminating in a three-phase voltage transformer T, separating two networks A and B the voltage harmonics preexisting within the three phase voltage feeding A and detrimental to B, or the current harmonics generated by B and detrimental to A. The devices include single phase transformers, the primary windings of which are ''''delta'''' coupled and the secondary windings of which are ''''star'''' coupled, the angles determined by the legs of the triangles and of the stars exhibiting unique values, together with single phase autotransformers for connection to the A and B networks. When eliminating only current harmonics, T need only be constituted of two single phase transformers the primary secondary windings of which are in quadrature together with single phase transformers, the windings of which are connected to specific current taps provided on the above-mentioned transformers. They can be used in installations for electrochemistry, electrometallurgy, power distribution of d.c. current and for installations of static power conversion.
    • 用于消除三相电压互感器T的装置,分离两个网络A和B,三相电压馈送A中预先存在的电压谐波并且不利于B,或由B产生的电流谐波并且对A有害。这些装置包括单 相位变压器,它们的初级绕组是“delta”耦合的,其次级绕组是“星形”耦合的,由三角形的支腿和呈现独特值的恒星确定的角度,以及单相自耦变压器,用于连接到 A和B网络。 当仅消除电流谐波时,T只需要由两个单相变压器构成,它们的初级次级绕组与单相变压器正交,其中绕组连接到设在上述变压器上的特定电流抽头。 它们可用于电化学,电冶,电力配电等场合的安装。 电流和静态电源转换的安装。