公开(公告)号：US06850921B1

公开(公告)日：2005-02-01

申请号：US09705008

申请日：2000-11-02

Applicant: Beverly Joyce Becker ,  Chi-Chin Wu ,  Gregory Allen Kaepp ,  Hassen Hammoud ,  Han C. Wang ,  Keming Chen ,  Nanxin Wang

Inventor： Beverly Joyce Becker ,  Chi-Chin Wu ,  Gregory Allen Kaepp ,  Hassen Hammoud ,  Han C. Wang ,  Keming Chen ,  Nanxin Wang

IPC: G06F15/18 ,  G06F17/50

CPC classification number: G06F17/5095

Abstract: A method (100) for cascading system level target to component level design objectives using machine learning and design synthesis techniques. The method (100) of the present invention uses machine learning techniques to build (106, 108) surrogate models from given system targets (102). The method then employs design synthesis methods to determine (110) a range of component level design objectives for the given system level targets using the surrogate models. The range of component level design objectives is fed back (112) to one of the surrogate models to determine (114) the component design objectives.

Abstract translation: 一种用于使用机器学习和设计合成技术将系统级目标级联到组件级设计目标的方法（100）。 本发明的方法（100）使用机器学习技术从给定的系统目标（102）构建（106,108）代理模型。 该方法然后使用设计合成方法来确定（110）使用代理模型的给定系统级目标的一系列组件级设计目标。 组件级设计目标的范围被反馈（112）到其中一个代理模型，以确定（114）组件设计目标。

公开(公告)号：US5828559A

公开(公告)日：1998-10-27

申请号：US794643

申请日：1997-02-03

Applicant: Keming Chen

Inventor： Keming Chen

IPC: H02M1/34 ,  H02M3/158 ,  H03K17/0814 ,  H02H7/12

CPC classification number: H02M1/34 ,  H02M3/158 ,  H03K17/08148 ,  H02M2001/342 ,  Y02B70/1491

Abstract: A soft switching device for electric power switching applications includes a switching element and a soft switching active snubber. The soft switching active snubber includes a capacitor, a rectifier and a soft switching active reset circuit. The capacitor connects in series with the rectifier and both of which connects across the switching element. The soft switching active reset circuit, connected across the rectifier as well as the capacitor, is responsive to a reset signal for active resetting of the capacitor within the normal switching cycle of the switching element. Energy absorbed by the capacitor is recovered to the input voltage source or to the load. This occurs contemporaneous with the power switching operation of the switching element. With the active snubber, soft switching is provided for both the switching element and a snubber switch within the active reset circuit, for an efficient and reliable circuit operation. The active snubber also allows additional controls for implementing an intelligent soft switching device. The soft switching device is a complete self-contained circuit. Its operation does not depend on any external circuit components. It can be used as an efficient, reliable, versatile and intelligent power switch in any kind of power switching applications. The active snubber and soft switching device introduce a new type of standard component for power electronics. They can be used in series or in parallel. The active snubber can also provide stress relief for a diode, a switching circuit and a mechanical switch.

Abstract translation: 用于电力开关应用的软开关装置包括开关元件和软开关有源缓冲器。 软开关有源缓冲器包括电容器，整流器和软开关有源复位电路。 电容器与整流器串联连接，两者都连接在开关元件上。 连接在整流器和电容器两端的软开关有源复位电路响应于复位信号，用于在开关元件的正常开关周期内有效地复位电容器。 电容吸收的能量被恢复到输入电压源或负载。 这与开关元件的电源开关操作同时发生。 利用有源缓冲器，为有效复位电路中的开关元件和缓冲开关提供软开关，以实现高效可靠的电路操作。 主动缓冲器还允许实现智能软开关设备的附加控制。 软开关器件是一个完整的独立电路。 其操作不依赖于任何外部电路组件。 它可以用作任何类型的电源开关应用中的高效，可靠，通用和智能的电源开关。 主动缓冲器和软开关器件引入了一种新型的电力电子标准元件。 它们可以串联或并联使用。 有源缓冲器还可以为二极管，开关电路和机械开关提供应力消除。

公开(公告)号：US20180116474A1

公开(公告)日：2018-05-03

申请号：US15582386

申请日：2017-04-28

Applicant: Keming CHEN

Inventor： Keming CHEN

IPC: A47K17/02 ,  E03D11/13

CPC classification number: A47K17/026 ,  E03D11/13

Abstract: The present invention relates to a ceramic toilet pan with handrails, comprising a ceramic toilet pan body and a water tank. Handrails are respectively arranged on both sides of the ceramic toilet pan body and the water tank, and the handrails, the ceramic toilet pan body and the water tank are formed integrally to form an integral structure. The present invention has the advantages of simple structure, novel and beautiful appearance, low cost, convenient cleaning, no need of other supporting facilities, no need of additional installation and small occupation area, the ceramic toilet pan with handrails is suitable for installation and use in bathrooms of families, public places and the like, and satisfies the need of going to the toilet for people having difficulty in moving, such as the old, the weak, the sick, the disabled and the pregnant.

公开(公告)号：US09360547B2

公开(公告)日：2016-06-07

申请号：US13436029

申请日：2012-03-30

Applicant: Aitan Ameti ,  Keming Chen ,  Robert J. Fontana ,  Edward A. Richley ,  Belinda Turner

Inventor： Aitan Ameti ,  Keming Chen ,  Robert J. Fontana ,  Edward A. Richley ,  Belinda Turner

IPC: G01S5/02 ,  G01S5/06 ,  G01S5/10

CPC classification number: G01S5/06 ,  G01S5/021 ,  G01S5/0221 ,  G01S5/10

Abstract: An ultra wideband (UWB) or short-pulse RF system is disclosed that can be used to precisely locate or track objects (such as personnel, equipment, assets, etc.) in real-time in an arbitrarily large, physically connected or disconnected, multipath and/or noisy environment. A system implementation includes multiple zones or groups of receivers that receives RF signals transmitted by one or more timing reference tags and one or more objects having associated object tags. Each zone or group may share a common receiver. By combining a multiple reference tag system with a virtual group of receivers, i.e., a zoning technique or system, a cost-effective system can be provided that offers scalability and flexibility to monitor a significantly expanded coverage area.

Abstract translation: 公开了一种超宽带（UWB）或短脉冲RF系统，其可用于在任意大的物理连接或断开的情况下实时地精确定位或跟踪物体（例如人员，设备，资产等） 多路径和/或噪声环境。 系统实现包括接收器的多个区域或组，其接收由一个或多个定时参考标签和具有相关联的对象标签的一个或多个对象发送的RF信号。 每个区域或组可以共享公共接收器。 通过将多个参考标签系统与虚拟接收机组即分区技术或系统组合，可以提供具有成本效益的系统，其提供可扩展性和灵活性来监视显着扩展的覆盖区域。

公开(公告)号：US20130128634A1

公开(公告)日：2013-05-23

申请号：US13300482

申请日：2011-11-18

Applicant: EVGENI GANEV ,  WILLIAM WARR ,  KEMING CHEN

Inventor： EVGENI GANEV ,  WILLIAM WARR ,  KEMING CHEN

IPC: H02M7/06 ,  H02M1/12

CPC classification number: H02M7/068 ,  H01F30/02 ,  H01F30/14 ,  H02M1/12 ,  H02M1/14 ,  H02M7/08

Abstract: A composite-like AC-to-DC converter has boosting capabilities. The term “composite AC-to-DC converter” has been coined to distinguish a converter using two or more conversion methods in parallel. All the autotransformer designs for the boost topology composite-like system begin with vector diagrams constructed using the tips of the line-to-line voltage vectors. A constructor arc is swung between these tips equal to the length of the line-to-line voltage vector span. The number of autotransformer three-phase outputs is then determined by the number of equally spaced rays drawn from the opposite vector tip to the arc. The intersection of points of these rays with the arc are used to design the composite-like autotransformer's winding's voltage ratios and interconnections.

Abstract translation: 复合式AC-DC转换器具有增强能力。 术语“复合AC-DC转换器”已被设计为使用两个或多个并行转换方法来区分转换器。 用于升压拓扑复合系统的所有自耦变压器设计都是以使用线间电压矢量提示构建的矢量图开始的。 这些尖端之间的构造电弧摆动等于线间电压矢量跨度的长度。 自耦变压器三相输出的数量然后由从相对向量尖端到弧线的等间距射线的数量确定。 这些光线与电弧的点用于设计复合式自耦变压器绕组的电压比和互连。

公开(公告)号：US20120086607A1

公开(公告)日：2012-04-12

申请号：US13270061

申请日：2011-10-10

Applicant: Aitan Ameti ,  Keming Chen ,  Robert J. Fontana ,  Edward A. Richley ,  Belinda Turner

Inventor： Aitan Ameti ,  Keming Chen ,  Robert J. Fontana ,  Edward A. Richley ,  Belinda Turner

IPC: G01S5/02

CPC classification number: G01S5/021 ,  G01S5/0009 ,  G01S5/14

Abstract: Various methods and apparatuses that utilize a wireless time reference system are provided herein. One example method involves calibrating independent, spatially-located clocks of a geoposition system in order to geolocate an object having an associated object tag. The example method may include transmitting an RF pulse pair, receiving the pulse pair at multiple locations, utilizing respective frequencies of first and second spatially-located clocks to produce count values to effect measurement of an interarrival interval at each of multiple locations, determining a ratio of count values relative to said first and second spatially-located clocks, and utilizing said ratio to calibrate time indications of said clocks. Other related methods and apparatus are also provided.

Abstract translation: 本文提供了利用无线时间基准系统的各种方法和装置。 一个示例性方法包括校准地理位置系统的独立的，位于空间上的时钟，以便对具有相关联的对象标签的对象进行地理定位。 示例性方法可以包括发射RF脉冲对，利用第一和第二空间位置时钟的相应频率在多个位置处接收脉冲对，以产生计数值，以在多个位置的每个位置处测量间隔间隔，确定比率 相对于所述第一和第二空间位置的时钟的计数值，并且利用所述比率来校准所述时钟的时间指示。 还提供了其他相关方法和装置。

公开(公告)号：US20100078997A1

公开(公告)日：2010-04-01

申请号：US12241398

申请日：2008-09-30

Applicant: KEMING CHEN ,  CHRISTOPHER P. HENZE ,  GEORGE R. WOODY

Inventor： KEMING CHEN ,  CHRISTOPHER P. HENZE ,  GEORGE R. WOODY

IPC: H02M3/335

CPC classification number: B60L1/00 ,  B60L2210/14 ,  Y02T10/7225 ,  Y10T307/406

Abstract: Systems and/or apparatus are provided for automotive electrical systems having power converters that are coupled by using a transformer. An electrical system comprises a boost converter, wherein a first winding of a transformer is coupled between the input node of the boost converter and a first reference node. The boost converter further includes a switch coupled between the first reference node and a second reference node and a diode coupled between the first reference node and the output node of the boost converter. An energy source is coupled between the input node and the second reference node and a first electrical load is coupled between the output node and the second reference node. The electrical system further comprises a voltage converter having an input coupled to a second winding of the transformer, and a second electrical load coupled to the output of the voltage converter.

Abstract translation: 为具有通过使用变压器耦合的功率转换器的汽车电气系统提供系统和/或设备。 电气系统包括升压转换器，其中变压器的第一绕组耦合在升压转换器的输入节点和第一参考节点之间。 升压转换器还包括耦合在第一参考节点和第二参考节点之间的开关以及耦合在升压转换器的第一参考节点和输出节点之间的二极管。 能量源耦合在输入节点和第二参考节点之间，并且第一电负载耦合在输出节点和第二参考节点之间。 电气系统还包括电压转换器，其具有耦合到变压器的第二绕组的输入端和耦合到电压转换器的输出的第二电负载。

公开(公告)号：US07643321B2

公开(公告)日：2010-01-05

申请号：US11236858

申请日：2005-09-27

Applicant: Keming Chen

Inventor： Keming Chen

IPC: H02M3/24 ,  H02M7/44 ,  H02M5/42

CPC classification number: H02M7/797 ,  H02M2001/0009

Abstract: A current sensing circuit that determines an output current of a bi-directional converter circuit comprises a current transformer that receives a first current signal and that outputs a second current signal. The first current signal is indicative of the output current and flows in one of a first direction and/or a second direction. The second current signal is indicative of the first current signal. A current sensing module receives the second current signal and has a first state and a second state. A converter control module simultaneously transitions the first current signal from the first direction to the second direction and transitions the current sensing module from the first state to the second state. The converter control module transitions the current sensing module to the first state after a resetting period.

Abstract translation: 确定双向转换器电路的输出电流的电流感测电路包括接收第一电流信号并输出​​第二电流信号的电流互感器。 第一电流信号指示输出电流并且在第一方向和/或第二方向之一中流动。 第二电流信号表示第一电流信号。 电流感测模块接收第二电流信号并具有第一状态和第二状态。 A转换器控制模块同时将第一电流信号从第一方向转换到第二方向，并且将电流感测模块从第一状态转变到第二状态。 转换器控制模块在复位周期之后将电流感测模块转换到第一状态。

公开(公告)号：US20090154205A1

公开(公告)日：2009-06-18

申请号：US11959003

申请日：2007-12-18

Applicant: KEMING CHEN

Inventor： KEMING CHEN

IPC: H02H7/125

CPC classification number: H02M3/33576 ,  H02M2001/0032 ,  H02M2001/342 ,  Y02B70/1491 ,  Y02B70/16

Abstract: A DC-to-DC converter and associated methods are provided for controlling the discharge of snubber capacitances during a light/no load buck mode of operation. An operating method for a DC-to-DC converter detects conditions corresponding to a light/no load buck mode of operation, and, in response to the detection of that mode, controls the states of a first switch, a second switch, a first switched diode element, a second switched diode element, a third switched diode element, and a fourth switched diode element to facilitate discharging of a first capacitance element and a second capacitance element through a secondary winding of a transformer.

Abstract translation: 提供DC-DC转换器和相关联的方法用于在轻/无负载降压操作模式期间控制缓冲电容的放电。 用于DC-DC转换器的操作方法检测与轻/无负载降压操作模式相对应的条件，并且响应于该模式的检测，控制第一开关，第二开关，第一 开关二极管元件，第二开关二极管元件，第三开关二极管元件和第四开关二极管元件，以便于通过变压器的次级绕组放电第一电容元件和第二电容元件。

公开(公告)号：US07393236B2

公开(公告)日：2008-07-01

申请号：US11219228

申请日：2005-09-02

Applicant: Alex Thompson ,  Mark D. Korich ,  Mark L Selogie ,  Keming Chen

Inventor： Alex Thompson ,  Mark D. Korich ,  Mark L Selogie ,  Keming Chen

IPC: H01R13/00

CPC classification number: H05K7/209 ,  H01L23/4093 ,  H01L2924/0002 ,  H01L2924/00

Abstract: An electrical system as described herein is suitable for use in an electric or hybrid vehicle. The electrical system includes electrical devices, such as power transistors, coupled to an electrically and thermally conductive bus bar. The respective nodes of the electrical devices are coupled to the bus bar such that the bus bar carries a combined signal generated by the electrical devices. The bus bar is also thermally coupled to a conduction heat transfer system, such as a liquid cooled cold plate. Thus, the bus bar functions as both an electrical conduit and a conduction-based heat sink for the electrical system.

Abstract translation: 如本文所述的电气系统适用于电动或混合动力车辆。 电气系统包括耦合到电和导热母线的电气设备，例如功率晶体管。 电气设备的相应节点耦合到母线，使得汇流条承载由电气设备产生的组合信号。 母线还与传导传热系统（例如液体冷却冷板）热耦合。 因此，汇流条作为电气系统的电导管和导电型散热器都起作用。