公开(公告)号：US20060246340A1

公开(公告)日：2006-11-02

申请号：US11412726

申请日：2006-04-26

Applicant: Riqing Zhang ,  Rui Liu ,  Junqing Dong

Inventor： Riqing Zhang ,  Rui Liu ,  Junqing Dong

IPC: H01M8/02 ,  H01M8/10 ,  H01M2/08 ,  H01M4/96

CPC classification number: H01M8/0273 ,  H01M8/0234 ,  H01M8/0276 ,  H01M8/0284 ,  H01M8/242 ,  H01M2008/1095

Abstract: A sealed proton-exchange membrane fuel cell unit of this invention comprises an MEA component, a sealing unit, and current collectors for the positive and negative electrodes. The current collectors press the MEA components from each side. The MEA components comprise a proton-exchange membrane, a sealing unit, and the positive and negative electrodes attached to each side of the membrane. A sealing unit cover the edges of the proton-exchange membrane. First positioning units are located on each side of said sealing unit facing the respective current collectors of the negative and positive electrodes. At the corresponding locations on the current collectors of the negative and positive electrodes there are second positioning units. The first and second positioning units correspondingly match each other. First positioning units can be convex in shape on the surface of the sealing units. The second positioning units can be sealing grooves formed by cutting on the surface of the current collectors facing the MEA component. By matching the locations of the first and second positioning units, the negative and positive current collectors are not likely to slide against each other. Thus the cell is more tightly sealed, achieving better air-tightness.

Abstract translation: 本发明的密封质子交换膜燃料电池单元包括MEA部件，密封单元和用于正极和负极的集电器。 目前的收藏家从各方按MEA组件。 MEA组分包括质子交换膜，密封单元，以及连接到膜的每一侧的正极和负极。 密封单元覆盖质子交换膜的边缘。 第一定位单元位于所述密封单元的面对负电极和正电极的相应集电器的每一侧上。 在负电极和正电极的集电器上的相应位置处存在第二定位单元。 第一和第二定位单元相应地彼此匹配。 第一定位单元可以在密封单元的表面上呈凸形。 第二定位单元可以是通过在面向MEA部件的集电器的表面上切割形成的密封槽。 通过匹配第一和第二定位单元的位置，负极和正极集电器不可能彼此滑动。 因此，电池更密封，实现更好的气密性。

公开(公告)号：US06188586B1

公开(公告)日：2001-02-13

申请号：US09553824

申请日：2000-04-21

Applicant: Richard Farrington ,  Mark E. Jacobs ,  Rui Liu ,  Vijayan J. Thottuvelil

Inventor： Richard Farrington ,  Mark E. Jacobs ,  Rui Liu ,  Vijayan J. Thottuvelil

IPC: H02M3335

CPC classification number: H02M3/337 ,  H02M1/15

Abstract: An asymmetrical half-bridge power converter and a method of manufacturing the same. In one embodiment, the asymmetrical half-bridge power converter includes: (1) first and second power switches configured to be controlled by complementary drive signals having nominal first and second duty cycles of D and 1-D, respectively and (2) first and second capacitors, having intrinsic capacitance values proportional to 1-D and D, respectively, and intrinsic equivalent series resistance (ESR) values proportional to D and 1-D, respectively, configured to reduce input ripple current associated with the asymmetrical half-bridge power converter.

Abstract translation: 不对称半桥功率转换器及其制造方法。 在一个实施例中，非对称半桥功率转换器包括：（1）第一和第二功率开关，其被配置为由分别具有D和1-D的标称第一和第二占空比的互补驱动信号控制，以及（2）第一和 分别具有与1-D和D成比例的固有电容值的第二电容器和分别与D和1-D成比例的本征等效串联电阻（ESR）值，其被配置为减少与不对称半桥功率相关联的输入纹波电流 转换器。

公开(公告)号：US6104584A

公开(公告)日：2000-08-15

申请号：US250938

申请日：1999-02-18

Applicant: Rui Liu

Inventor： Rui Liu

IPC: H02H9/00 ,  H02H7/00

CPC classification number: H02H9/001 ,  Y10S323/908

Abstract: The present invention provides a protection circuit for, and method of, sensing a transient condition and limiting a current, and a power supply having a filter incorporating the protection circuit or method. In one embodiment, the protection circuit includes: (1) a current-limiting component coupled between the filter and a return node, (2) a bypass switch coupled across the current-limiting component, (3) a load-current return switch series-coupled between an output of the power supply and the return node and (4) a control circuit that senses a transient condition in the power supply and controls at least one of the bypass switch and the load-current return switch.

Abstract translation: 本发明提供了一种用于感测瞬态条件和限制电流的保护电路及其方法，以及具有包含保护电路或方法的滤波器的电源。 在一个实施例中，保护电路包括：（1）耦合在滤波器和返回节点之间的限流部件，（2）跨越限流部件耦合的旁路开关，（3）负载电流返回开关系列 - 耦合在电源的输出和返回节点之间，以及（4）感测电源中的瞬态状态并控制旁路开关和负载电流返回开关中的至少一个的控制电路。

公开(公告)号：US5949671A

公开(公告)日：1999-09-07

申请号：US48246

申请日：1998-03-25

Applicant: Victor K. Lee ,  Rui Liu

Inventor： Victor K. Lee ,  Rui Liu

IPC: H02M7/17 ,  G05F1/563 ,  H02M1/10 ,  H02M3/335 ,  H02M7/12

CPC classification number: H02M3/33561

Abstract: For use with a DC power supply having first and second output rectifying circuits couplable in alternative configurations to provide dual voltages at an output of the DC power supply, an adaptive voltage controller and a method of adaptively controlling the output voltage. In one embodiment, the adaptive voltage controller includes: (1) a configuration determination circuit, coupled to the output, that generates a configuration signal that is a function of a configuration of the first and second output rectifying circuits, (2) a voltage feedback circuit, coupled to the configuration determination circuit, that develops a voltage feedback signal based on the configuration signal and (3) a voltage control circuit, coupled to the voltage feedback circuit, that receives the voltage feedback signal and controls an output voltage of the DC power supply as a function thereof.

Abstract translation: 用于具有可替换配置的第一和第二输出整流电路的DC电源，以在DC电源的输出端提供双电压，自适应电压控制器和自适应地控制输出电压的方法。 在一个实施例中，自适应电压控制器包括：（1）耦合到输出的配置确定电路，其产生作为第一和第二输出整流电路的配置的函数的配置信号，（2）电压反馈 电路，耦合到配置确定电路，其基于配置信号产生电压反馈信号;以及（3）耦合到电压反馈电路的电压控制电路，其接收电压反馈信号并控制DC的输出电压 电源作为其功能。

公开(公告)号：US5870291A

公开(公告)日：1999-02-09

申请号：US936986

申请日：1997-09-25

Applicant: Richard W. Farrington ,  Mark E. Jacobs ,  Rui Liu

Inventor： Richard W. Farrington ,  Mark E. Jacobs ,  Rui Liu

IPC: H02M3/335

CPC classification number: H02M3/33569

Abstract: An asymmetrical half-bridge converter, a method of operating the same and a power supply that incorporates either the converter or the method. In one embodiment, the converter includes: (1) a power transformer that receives asymmetrical AC input power into a primary winding thereof via an input capacitor, the asymmetrical AC input power inducing a DC bias current in a secondary winding of the power transformer and (2) first and second serially-coupled output inductors coupled across the secondary winding and having parasitic resistances associated therewith that are independently selectable to attenuate the DC bias circuit in the secondary winding.

Abstract translation: 不对称半桥转换器，其操作方法以及包含转换器或方法的电源。 在一个实施例中，转换器包括：（1）电源变压器，其经由输入电容器将不对称的AC输入功率接收到其初级绕组中，所述非对称AC输入功率引起所述电力变压器的次级绕组中的DC偏置电流， 2）耦合在次级绕组两端并具有与其相关联的寄生电阻的第一和第二串联耦合的输出电感器，其独立地可选择以衰减次级绕组中的DC偏置电路。

公开(公告)号：US5808879A

公开(公告)日：1998-09-15

申请号：US773117

申请日：1996-12-26

Applicant: Rui Liu ,  Wen-Jian Gu

Inventor： Rui Liu ,  Wen-Jian Gu

IPC: H02M1/44 ,  H02M3/337 ,  H02M3/335 ,  H02M3/24 ,  G05F1/013

CPC classification number: H02M1/44 ,  H02M3/337

Abstract: A DC-DC ZVS PWM converter circuit which utilizes the leakage inductance of an output transformer and a three-step operation cycle so as to reduce the voltage stress on the converter power switching transistors and to reduce the EMI noise emissions of the circuit.

Abstract translation: DC-DC ZVS PWM转换器电路，利用输出变压器的漏电感和三步操作周期，以降低转换器功率开关晶体管的电压应力，并减少电路的EMI噪声发射。

公开(公告)号：US5642274A

公开(公告)日：1997-06-24

申请号：US280747

申请日：1994-07-26

Applicant: Joseph G. Zahnen ,  William S. Burdick ,  Daniel Kustera ,  Dhaval B. Dalal ,  Rui Liu ,  Paulo Caldeira

Inventor： Joseph G. Zahnen ,  William S. Burdick ,  Daniel Kustera ,  Dhaval B. Dalal ,  Rui Liu ,  Paulo Caldeira

IPC: H02M3/28 ,  H02M1/08 ,  H02M3/335

CPC classification number: H02M3/33507

Abstract: A controller for supplying a switching signal to a switched mode power supply, includes a sinusoidal-like wave generator, and circuitry for selectively shifting a dc level in the sinusoidal-like wave whereby a duty cycle of the sinusoidal-like wave at a predetermined threshold level, corresponding to a turn-on level of a power switch in the switched mode power supply, is effectively controlled.

Abstract translation: 用于向切换模式电源提供开关信号的控制器包括正弦波形发生器和用于选择性地移动正弦波形中的直流电平的电路，由此正弦波的占空比处于预定阈值 对应于开关模式电源中的电源开关的导通电平的电平被有效地控制。

公开(公告)号：US5528481A

公开(公告)日：1996-06-18

申请号：US483919

申请日：1995-06-07

Applicant: Paulo Caldeira ,  Rui Liu

Inventor： Paulo Caldeira ,  Rui Liu

IPC: H02M1/44 ,  H02M3/335

CPC classification number: H02M1/44 ,  H02M3/335 ,  Y02B70/1433

Abstract: A converter for supplying various output voltages for a television receiver includes a multi-resonant circuit, including a resonant inductor, the leakage inductance of a flyback transformer, and a charging capacitor (including the parasitic capacitance of a switching transistor). This arrangement relaxes the slope of the voltages in the converter resulting in reduced radiated EMI. In addition, the values of the inductor and the capacitor are adjusted so that the switching transistor turns on at zero voltage and zero current so that the switching transistor is less stressed and the converter is capable of high frequency operation. Finally, the switching signals applied to the switching transistor are subjected to a filter-delay to lessen the slope of the signals thereby also resulting in a reduction in the EMI radiated from the driving circuit.

Abstract translation: 用于为电视接收机提供各种输出电压的转换器包括包括谐振电感器，回扫变压器的漏电感和充电电容器（包括开关晶体管的寄生电容）的多谐振电路。 这种布置使转换器中的电压的斜率放松，从而减少辐射EMI。 此外，调节电感器和电容器的值，使得开关晶体管在零电压和零电流下导通，使得开关晶体管的应力较小，并且转换器能够进行高频操作。 最后，施加到开关晶体管的开关信号经受滤波器延迟以减小信号的斜率，从而也导致从驱动电路辐射的EMI的减小。

公开(公告)号：US5363287A

公开(公告)日：1994-11-08

申请号：US203964

申请日：1994-03-01

Applicant: Rui Liu ,  Paulo Caldeira

Inventor： Rui Liu ,  Paulo Caldeira

IPC: H04N3/18 ,  H02M1/44 ,  H02M3/28 ,  H02M3/335 ,  H04N5/63

CPC classification number: H02M1/44 ,  H02M3/335 ,  H02M3/33561 ,  H04N5/63 ,  Y02B70/1433

Abstract: A forward converter for supplying various output voltages for a television receiver includes a multi-resonant circuit, including a resonant inductor, a charging capacitor, and the output capacitors across each secondary winding of an output transformer. This arrangement relaxes the slopes of the voltages in the converter resulting in reduced radiated EMI. In addition, the values of the inductor and the capacitors are adjusted so that a switching transistor in the forward converter turns on at zero voltage and zero current so that the switching transistor is less stressed and the converter is capable of high frequency operation. The secondary providing high voltage includes the series arrangement of two oppositely conducting diode branches, each branch including the series arrangement of a high voltage diode and a Schottky diode. Finally, the switching signals applied to the switching transistor are subjected to a filter-delay to lessen the slope of the signals thereby also resulting in a reduction in the EMI radiated from the driving circuit.

Abstract translation: 用于为电视接收机提供各种输出电压的正激转换器包括多谐振电路，包括谐振电感器，充电电容器和输出变压器的每个次级绕组上的输出电容器。 这种布置使转换器中的电压斜率放松，从而减少辐射EMI。 此外，调整电感器和电容器的值，使得正向转换器中的开关晶体管在零电压和零电流下导通，使得开关晶体管的应力较小，并且转换器能够进行高频操作。 次级提供高电压包括两个相对导电的二极管分支的串联布置，每个分支包括高压二极管和肖特基二极管的串联布置。 最后，施加到开关晶体管的开关信号经受滤波器延迟以减小信号的斜率，从而也导致从驱动电路辐射的EMI的减小。

公开(公告)号：US20230356061A1

公开(公告)日：2023-11-09

申请号：US17735370

申请日：2022-05-03

Applicant: Wen-Kuei LIU ,  Hsiu-Feng CHEN ,  Chao-Hsuan LIU ,  Yu-Chun LIU ,  Yi-Shan LIU ,  Yu-Cheng LIU ,  Yan-Rui LIU

Inventor： Wen-Kuei LIU ,  Hsiu-Feng CHEN ,  Chao-Hsuan LIU ,  Yu-Chun LIU ,  Yi-Shan LIU ,  Yu-Cheng LIU ,  Yan-Rui LIU

IPC: A63C17/14 ,  F16D59/00

CPC classification number: A63C17/1418 ,  F16D59/00 ,  F16D2121/14

Abstract: A braking mechanism of a wheeled device is provided, including: a main body, configured to be connected to the wheeled device including at least one wheel; an adjusting member, disposed on the main body and including a rod and a first abutting member adjustably positioned on the rod; a braking member, movably disposed on the main body; and an elastic member, abutted between the first abutting member and the braking member so that the braking member is biased by the force of the elastic member toward the at least one wheel to frictionally contact the at least one wheel.