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21 条记录 (耗时 0.013 秒)

    Simplified harmonic-free constant-voltage transformer
    2.
    发明申请
    Simplified harmonic-free constant-voltage transformer 审中-公开
    简单无谐波恒压变压器

    公开(公告)号：US20050258927A1

    公开(公告)日：2005-11-24

    申请号：US10197999

    申请日：2002-07-17

    申请人： Weimin Lu

    发明人： Weimin Lu

    IPC分类号： H01F3/12 ,  H01F3/14 ,  H01F27/24 ,  H01F27/245 ,  H01F27/38

    CPC分类号： H01F27/385 ,  H01F3/12 ,  H01F3/14 ,  H01F27/245

    摘要： A ferroresonant transformer to produce an output voltage that has a substantially constant output voltage that is substantially free of harmonics includes a ferromagnetic core with a winding part and primary and secondary windings on that part. The core also includes a flux return part. Magnetic shunts magnetically couple some of the flux from the core between the primary and secondary windings to the flux return part. The core includes a region with a reduced cross-sectional area that constitutes an air gap to form a built-in inductor. The remainder of the core works with the secondary winding and a resonating capacitor to generate a substantially harmonic-free, constant-voltage output. The transformer may have one set of primary-secondary windings if it is to operate on single-phase alternating current, or it may have multiple sets if it is to operate on multi-phase alternating current.

    摘要翻译： 用于产生具有基本上没有谐波的基本上恒定的输出电压的输出电压的铁磁谐振变压器包括具有绕组部分的铁磁芯和该部分上的初级和次级绕组。 磁芯还包括磁通返回部分。 磁分流器将来自主绕组和次级绕组之间的芯的一些磁通量磁耦合到磁通返回部件。 芯包括具有减小的横截面面积的区域，其构成气隙以形成内置电感器。 核心的其余部分与次级绕组和谐振电容器一起工作，以产生基本上无谐波的恒定电压输出。 如果要在单相交流电中工作，变压器可能具有一组初级次级绕组，或者如果要在多相交流电中工作，它可能具有多组。

    Bend insensitive single mode fiber
    3.
    发明授权
    Bend insensitive single mode fiber 有权
    弯曲不敏感单模光纤

    公开(公告)号：US08750664B2

    公开(公告)日：2014-06-10

    申请号：US13059971

    申请日：2009-07-03

    申请人： Liyong Zhang ,  Weimin Lu ,  Haigang Wu ,  Qunxing Li ,  Xiaopeng Huang

    发明人： Liyong Zhang ,  Weimin Lu ,  Haigang Wu ,  Qunxing Li ,  Xiaopeng Huang

    IPC分类号： G02B6/02 ,  G02B6/036

    CPC分类号： G02B6/0281 ,  G02B6/02395 ,  G02B6/03611 ,  G02B6/03627

    摘要： This invention discloses a bend insensitive single mode fiber, which is composed by a bare glass fiber with a round cross section and two resin protective layers with circular cross sections surrounding the outer of the bare glass fiber. It is characterized in that the bare glass fiber is composed by a core layer with a round cross section and two claddings with circular cross sections. The refractive index of the core layer is higher than the index of the two claddings and the refractive index difference between the core layer and the first cladding is larger than the difference between the first and second claddings. The second cladding is made of pure SiO2. The refractive index profile of the core layer follows a power function, and the refractive index profile of the two claddings follow a ladder-type distribution. The loss of the invented fiber is insensitive to the bending of the fiber, which meets the requirements of ITU.T G.657.A and G.657.B standards, respectively. It is applicable to the Fiber To The Home (FTTH) and other local area network and the access network systems.

    摘要翻译： 本发明公开了一种弯曲不敏感单模光纤，其由具有圆形横截面的裸露玻璃纤维和具有围绕裸露玻璃纤维外部的圆形横截面的两个树脂保护层组成。 其特征在于，裸玻璃纤维由具有圆形截面的芯层和具有圆形横截面的两个包层组成。 芯层的折射率高于两个包层的折射率，并且芯层和第一包层之间的折射率差大于第一和第二包层之间的差。 第二包层由纯SiO2制成。 芯层的折射率分布遵循功率函数，并且两个包层的折射率分布遵循梯形分布。 本发明光纤的损耗对光纤的弯曲不敏感，分别符合ITU-T G.657.A和G.657B标准的要求。 适用于光纤到户（FTTH）等局域网和接入网系统。

    Harmonic filtering circuit with special transformer
    4.
    发明授权
    Harmonic filtering circuit with special transformer 失效
    具有专用变压器的谐波滤波电路

    公开(公告)号：US06856230B2

    公开(公告)日：2005-02-15

    申请号：US10446002

    申请日：2003-05-27

    申请人： Weimin Lu

    发明人： Weimin Lu

    IPC分类号： H01F27/38 ,  H03H1/00 ,  H01F27/24

    CPC分类号： H02J3/01 ,  H01F27/385 ,  H03H1/0007 ,  H03H2001/0057 ,  Y02E40/40

    摘要： A filter uses a special autotransformer that has a ferromagnetic core with a plurality of legs and flux return bars. A first coil is located on one leg, and a second coil is located on the same leg, but spaced from the first coil. The first coil and at least part of the second coil are connected in series to receive distorted alternating current and at least that part of the second coil is connected to an output terminal. Between the coils and extending at least part of the way from the first leg to an adjacent leg is a magnetic shunt assembly to divert part of the flux generated in the first coil by the alternating current so that that part does not link with the second coil. An air gap is located to link with the second coil to create an inductor in that coil by flux in the second coil, and a capacitor is connected across the second coil to tune it to the fundamental frequency of the alternating current and substantially reduce harmonics in that current.

    摘要翻译： 滤波器使用具有铁磁芯的特殊自耦变压器，其具有多个支路和通量返回条。 第一线圈位于一条腿上，第二线圈位于相同的腿上，但与第一线圈间隔开。 第一线圈和第二线圈的至少一部分串联连接以接收失真的交流电流，并且至少第二线圈的那部分连接到输出端子。 在线圈之间并且从第一腿至相邻腿部延伸的至少一部分路径是磁分路组件，以将由第一线圈中产生的一部分磁通转向交流电流，使得该部分不与第二线圈相连 。 气隙被定位成与第二线圈连接以在该线圈中通过第二线圈中的磁通产生电感器，并且电容器连接在第二线圈两端以将其调谐到交流电的基频，并且基本上减少 那当前。

    Compact telephoto lens camera suitable for use in smart phones and similar devices, and methods of using same
    5.
    发明授权
    Compact telephoto lens camera suitable for use in smart phones and similar devices, and methods of using same 有权

    公开(公告)号：US10133043B1

    公开(公告)日：2018-11-20

    申请号：US16016006

    申请日：2018-06-22

    申请人： Weimin Lu

    发明人： Weimin Lu

    IPC分类号： G02B17/08 ,  G02B5/00 ,  H04N5/225

    摘要： A compact, on-axis telephoto lens camera includes an arrangement of mirrors which receives incident light, and compresses and redirects the light, the arrangement having a primary mirror which receives the incident light, compresses and redirects the light toward a focal point of the primary mirror and has an opening defined at a central portion thereof, and a secondary mirror which receives light from the primary mirror and further redirects same. The camera also includes a cavity which extends into the camera from the opening of the primary mirror, aspheric lenses disposed at least partially within the cavity which receive the light from the multiple-mirror arrangement, and progressively expand and redirect the light received from the mirror arrangement, and an image sensor which receives the light from the aspheric lenses. The image sensor is disposed closely adjacent to the cavity such that a back focal length is substantially zero.

    Hybrid optical devices, and applications using same including optical cloaking system
    6.
    发明授权
    Hybrid optical devices, and applications using same including optical cloaking system 有权

    公开(公告)号：US09977158B2

    公开(公告)日：2018-05-22

    申请号：US14703992

    申请日：2015-05-05

    申请人： Weimin Lu

    发明人： Weimin Lu

    IPC分类号： G02B5/09 ,  G02B17/08 ,  G02B27/09 ,  G02B17/00 ,  G02B17/02

    CPC分类号： G02B5/09 ,  G02B17/008 ,  G02B17/02 ,  G02B17/08 ,  G02B17/086 ,  G02B27/0938

    摘要： A hybrid optical device for compressing light, including a first part which receives incident light shining on the device, wherein the first part is formed into sections along at least one direction thereof, wherein the sections receive respective portions of the light received by the first part, and individually compress and redirect the received portions of light, a second part which includes plural reflective surfaces which receive the compressed light from the sections of the first portion and further compress and redirect the portions of light, and a third part which receives the further compressed portions of light from the sections of the second part, and redirects same such that the light is output from the device.