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85 条记录 (耗时 0.028 秒)

    Forced commutated starting circuit for load commutated inverter drive system
    41.
    发明授权
    Forced commutated starting circuit for load commutated inverter drive system 失效
    用于负载换向变频器驱动系统的强制整流启动电路

    公开(公告)号：US4288732A

    公开(公告)日：1981-09-08

    申请号：US965165

    申请日：1978-11-30

    申请人： James W. A. Wilson ,  Robert L. Steigerwald

    发明人： James W. A. Wilson ,  Robert L. Steigerwald

    IPC分类号： H02P1/46 ,  H02P7/42

    CPC分类号： H02P1/46

    摘要： In an inverter-synchronous machine drive system wherein a synchronous machine is excited by an inverter from a source of direct current, a pair of controlled bidirectional conduction means are serially coupled across the source of direct current potential, and are coupled at their junction through a commutating capacitor to the machine neutral terminal. Each controlled bidirectional conduction means, together with corresponding phase connected thyristor within the inverter, is correspondingly gated in a predetermined sequence so as to cause alternating voltage to be applied across each corresponding machine phase for initial machine excitation.

    摘要翻译： 在逆变器同步机驱动系统中，其中同步电机由逆变器从直流电源激励，一对受控双向传导装置跨越直流电势源串联耦合，并通过一个 整流电容器到机器中性端子。 每个受控双向传导装置以及逆变器内相应的相连的晶闸管相应地以预定的顺序进行门控，以使交流电压施加在每个对应的机器相位上用于初始机器激励。

    High efficiency circuit for rapidly charging batteries
    42.
    发明授权
    High efficiency circuit for rapidly charging batteries 失效
    高效率电路用于快速充电电池

    公开(公告)号：US4211969A

    公开(公告)日：1980-07-08

    申请号：US958698

    申请日：1978-11-08

    申请人： Robert L. Steigerwald

    发明人： Robert L. Steigerwald

    IPC分类号： H02J7/00 ,  H02J7/10

    CPC分类号： H02J7/0093 ,  Y02B40/90 ,  Y10S320/17 ,  Y10S320/24

    摘要： An improved battery charger circuit for rapidly charging batteries by increasing the rate of battery charge acceptance through periodic battery discharge pulses during the charging process includes first and second chopper circuits coupled in parallel through an inductor across the DC source for coupling to a battery.The first chopper circuit controls the amplitude of battery charge current while the second chopper circuit controls the amplitude of battery discharge current and provides a low impedance conduction path for discharge current to be returned to the DC source, thus realizing an efficient battery charger circuit.

    摘要翻译： 一种改进的电池充电器电路，用于通过在充电过程中通过周期性电池放电脉冲增加电池充电接受率来快速充电电池，包括通过跨越DC源的电感器并联耦合的第一和第二斩波电路，用于耦合到电池。 第一斩波电路控制电池充电电流的振幅，而第二斩波电路控制电池放电电流的幅度，并提供用于放电电流的低阻抗传导路径以返回到DC源，从而实现有效的电池充电器电路。

    Power inductor and transformer with low acoustic noise air gap
    43.
    发明授权
    Power inductor and transformer with low acoustic noise air gap 失效
    功率电感和变压器具有低噪声气隙

    公开(公告)号：US4047138A

    公开(公告)日：1977-09-06

    申请号：US688010

    申请日：1976-05-19

    申请人： Robert L. Steigerwald

    发明人： Robert L. Steigerwald

    IPC分类号： H01F27/255 ,  H01F27/26 ,  H01F27/33 ,  H01F27/24

    CPC分类号： H01F27/33 ,  H01F27/255 ,  H01F27/263 ,  Y10S174/24

    摘要： A ferrite magnetic core includes a one-piece rectangular outer member with aligned circular apertures in which the ends of a cylindrical center member are retained to thus establish a radial air gap. Radial magnetic forces acting on the core members are summed to zero to theoretically eliminate movement and result in low acoustic noise in high operating frequency power inductors and transformers. A magnetic bridge is added to reduce air gap fringing flux outside the core. Other modifications and a "C" core configuration are described.

    摘要翻译： 铁氧体磁芯包括具有对准的圆形孔的一体式矩形外部构件，其中保持圆柱形中心构件的端部，从而建立径向气隙。 作用在芯体上的径向磁力相加到零，以理论上消除运动，并导致高工作频率功率电感和变压器中的低噪声。 添加磁桥以减少芯外的气隙流动通量。 描述了其它修改和“C”核心配置。

    Current fed inverter with commutation independent of load inductance
    44.
    发明授权
    Current fed inverter with commutation independent of load inductance 失效
    具有独立的负载电感的电流互感器逆变器

    公开(公告)号：US4039926A

    公开(公告)日：1977-08-02

    申请号：US698000

    申请日：1976-06-21

    申请人： Robert L. Steigerwald

    发明人： Robert L. Steigerwald

    IPC分类号： H02M7/515

    CPC分类号： H02M7/5152

    摘要： A three phase bridge inverter supplies rectangular wave currents to an inductive load and to capacitors connected in wye across the load for wave shaping as well as filtering and power factor correction. A commutating capacitor connected to the midpoint of the wye-connected capacitors is controlled by two auxiliary thyristors. The commutating capacitor voltage is sensed and an incoming thyristor is not fired until the voltage rises to a level sufficient to commutate the next thyristor in sequence. This commutation is independent of load inductance.

    Front-end power converter for distributed power systems
    48.
    发明授权
    Front-end power converter for distributed power systems 失效
    用于分布式电力系统的前端功率转换器

    公开(公告)号：US5576940A

    公开(公告)日：1996-11-19

    申请号：US370283

    申请日：1995-01-09

    申请人： Robert L. Steigerwald ,  Ljubisa D. Stevanovic

    发明人： Robert L. Steigerwald ,  Ljubisa D. Stevanovic

    IPC分类号： H02J1/10 ,  H02M3/335

    CPC分类号： H02J1/102 ,  H02M3/33523 ,  H02J1/108

    摘要： A front end converter for interfacing prime power to a lower voltage distribution bus, e.g., Vdc, in a distributed power system has a natural droop characteristic which emulates a series resistor, but without associated losses. With this droop characteristic, converters are paralleled and share load current without any interconnecting control signals, thus avoiding any single point of failure and the need for several high-voltage isolation devices. The drooping effect also has a damping effect, resulting in a more stable power system.

    摘要翻译： 在分布式电力系统中用于将主要功率与较低电压分配总线（例如Vdc）进行接口的前端转换器具有模拟串联电阻器但没有相关联的损耗的自然下降特性。 具有这种下降特性，转换器并联并共享负载电流，无需任何互连控制信号，从而避免任何单点故障和需要几个高压隔离器件。 下垂效应也具有阻尼效应，导致更稳定的电力系统。

    Very low leakage inductance, single-laminate transformer
    49.
    发明授权
    Very low leakage inductance, single-laminate transformer 失效
    非常低的漏电感，单层变压器

    公开(公告)号：US5570074A

    公开(公告)日：1996-10-29

    申请号：US453229

    申请日：1995-05-30

    申请人： Robert L. Steigerwald ,  Alexander J. Yerman ,  Waseem A. Roshen

    发明人： Robert L. Steigerwald ,  Alexander J. Yerman ,  Waseem A. Roshen

    IPC分类号： H01F17/00 ,  H01F17/04 ,  H01F27/28 ,  H01F27/30

    CPC分类号： H01F17/0006 ,  H01F17/043 ,  H01F27/2804

    摘要： A transformer having a very low, predetermined leakage inductance includes an elongate dielectric laminate having two surfaces. A primary winding having a pattern conformal to the configuration of the laminate is disposed on one surface and extends substantially the length of the laminate. The laminate has at least one secondary winding disposed on its other surface. The laminate is rolled with a dielectric layer about a cylinder, and the primary and secondary windings are patterned such that the primary and secondary windings comprise interleaved winding layers with the dielectric layer disposed between each of the winding layers. The rolled laminate, dielectric layer, and windings are contained within a cylindrical magnetic pot core. The result is a transformer having tightly interleaved primary and secondary windings and, therefore, a very low leakage inductance. In addition, the distance between adjacent primary and secondary turns is fixed by the thickness of the dielectric layer; hence, the leakage inductance is highly predictable.

    摘要翻译： 具有非常低的预定的漏电感的变压器包括具有两个表面的细长介电层压板。 具有与层压体的构造一致的图案的初级绕组设置在一个表面上并且基本上延伸层压体的长度。 层压体具有设置在其另一表面上的至少一个次级绕组。 层叠体用围绕圆柱体的介电层卷起，并且初级和次级绕组被图案化，使得初级和次级绕组包括交替的绕组层，其中介电层设置在每个绕组层之间。 轧制的层压体，电介质层和绕组包含在圆柱形磁性罐芯内。 结果是具有紧密交错的初级和次级绕组的变压器，因此具有非常低的漏电感。 此外，相邻的主匝和次级匝之间的距离由电介质层的厚度固定; 因此，漏电感是高度可预测的。

    Boost regulated capacitor multiplier for pulse load
    50.
    发明授权
    Boost regulated capacitor multiplier for pulse load 失效
    升压调节电容倍增器用于脉冲负载

    公开(公告)号：US5451962A

    公开(公告)日：1995-09-19

    申请号：US296579

    申请日：1994-08-26

    申请人： Robert L. Steigerwald

    发明人： Robert L. Steigerwald

    IPC分类号： G01S7/03 ,  G01S7/282 ,  H02M3/28 ,  H02M3/337 ,  H02M3/335

    CPC分类号： G01S7/282 ,  H02M3/285 ,  H02M3/337 ,  G01S7/032

    摘要： A capacitance multiplier/regulator (FIG. 1) stores charge at high voltage across a capacitor (22,32), and capacitance-multiplies current to a load (100) by step-down transformers (26,36), controlled switches (24,34), and rectifiers (28,38). The switch pairs (24a,24b;34a,34b) each switch in antiphase, but the switching phase between the pairs is controlled (FIG. 5) in a feedback manner to controllably generate a voltage across a transformer primary winding (14.sub.p), which couples a feedback-controlled alternating voltage across secondary winding (14.sub.s). The alternating voltage is added to the unregulated voltage by a rectifier (18,20), so the bus voltage is controllably greater than the unregulated input voltage. The feedback controls either the bus voltage or the load voltage. Stress on the switches is reduced by preventing capacitor recharge during a load pulse.

    摘要翻译： 电容倍增器/调节器（图1）在电容器（22,32）两端以高电压存储电荷，并且通过降压变压器（26,36），受控开关（24）将电流与负载（100）进行电容倍增 ，34）和整流器（28,38）。 开关对（24a，24b; 34a，34b）各自反相开关，但是以反馈方式控制成对之间的开关相位（图5），以可控地产生变压器初级绕组（14p）两端的电压， 在二次绕组（14s）耦合反馈控制的交流电压。 交流电压通过整流器（18,20）加到未调节的电压上，因此总线电压可控地大于未调节的输入电压。 反馈控制总线电压或负载电压。 在负载脉冲期间通过防止电容器充电来减少开关上的应力。