公开(公告)号：US20130170257A1

公开(公告)日：2013-07-04

申请号：US13342845

申请日：2012-01-03

Applicant: EVGENI GANEV ,  WILLIAM WARR ,  KEMING CHEN

Inventor： EVGENI GANEV ,  WILLIAM WARR ,  KEMING CHEN

IPC: H02M1/12 ,  H02M7/06

CPC classification number: H01F30/02 ,  H01F30/12 ,  H02M5/14

Abstract: A composite power conversion method using a WYE asymmetrical autotransformer that converts electrical power from AC to DC uses two or more conversion methods in parallel and provides a passive technique that “splits” the input 3-phase voltages into additional phases, so that the number of DC rectification pulses is increased to improve AC line current THD The WYE asymmetric autotransformer topology provides a potential improvement in size/weight and efficiency compared to former asymmetric autotransformers.

Abstract translation: 使用将电力从AC转换为DC的WYE不对称自耦变压器的复合功率转换方法并联使用两个或更多个转换方法，并提供将输入的三相电压“分为”到另外的相位的无源技术， 增加直流整流脉冲以改善交流线路电流THD与以前的非对称自耦变压器相比，WYE不对称自耦变压器拓扑结构提供了大小/重量和效率的潜在改进。

公开(公告)号：US20120188129A1

公开(公告)日：2012-07-26

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: G01S3/02

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：US08149169B1

公开(公告)日：2012-04-03

申请号：US12769105

申请日：2010-04-28

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: G01S3/02

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：US08022569B2

公开(公告)日：2011-09-20

申请号：US12256808

申请日：2008-10-23

Applicant: Keming Chen ,  Christopher P. Henze ,  Stephen Raiser ,  George R. Woody

Inventor： Keming Chen ,  Christopher P. Henze ,  Stephen Raiser ,  George R. Woody

IPC: B60L3/00 ,  H01H47/00 ,  H02J7/00

CPC classification number: B60L3/0046 ,  B60L3/04 ,  Y10T307/76

Abstract: Systems and methods are provided for discharging a high-voltage bus using semiconductor devices. A discharge system for a first voltage rail and a second voltage rail comprises a first semiconductor device coupled to a first voltage rail and a second semiconductor device coupled between the first semiconductor device and a second voltage rail. A control circuit is coupled to the first semiconductor device and the second semiconductor device. In response to a discharge condition, the control circuit is configured to activate the first semiconductor device and gradually activate the second semiconductor device, such that the energy potential between the first voltage rail and the second voltage rail is gradually dissipated through the semiconductor devices.

Abstract translation: 提供了使用半导体器件对高压总线进行放电的系统和方法。 用于第一电压轨和第二电压轨的放电系统包括耦合到第一电压轨的第一半导体器件和耦合在第一半导体器件与第二电压轨之间的第二半导体器件。 控制电路耦合到第一半导体器件和第二半导体器件。 响应于放电条件，控制电路被配置为激活第一半导体器件并逐渐激活第二半导体器件，使得第一电压轨和第二电压轨之间的能量电势通过半导体器件逐渐消散。

公开(公告)号：US07924134B2

公开(公告)日：2011-04-12

申请号：US11958154

申请日：2007-12-17

Applicant: Keming Chen

Inventor： Keming Chen

IPC: H01F27/28 ,  H01F27/02 ,  H01F21/06 ,  H01F27/24 ,  H01F17/04 ,  H02J3/00 ,  H02M5/45

CPC classification number: B60K6/40 ,  B60K6/32 ,  H02M3/00 ,  Y02T90/34

Abstract: A vehicular power converter includes switches and first and second inductive components. The first and second inductive components have substantially adjacent portions and are coupled to the plurality of switches such that when current flows from the plurality of switches and through the first and second inductive components, flux generated by the current flowing through the adjacent portions of the first and second inductive components and located between the adjacent portions is oriented in substantially opposite directions.

Abstract translation: 车载功率转换器包括开关和第一和第二电感元件。 第一和第二电感元件具有基本上相邻的部分并且耦合到多个开关，使得当电流从多个开关流过并且通过第一和第二电感元件时，由流过第一和第二电感元件的相邻部分的电流产生的磁通 并且位于相邻部分之间的第二感应部件被定向成基本相反的方向。

公开(公告)号：US20080284387A1

公开(公告)日：2008-11-20

申请号：US11748106

申请日：2007-05-14

Applicant: KEMING CHEN ,  Steven E. Schulz

Inventor： KEMING CHEN ,  Steven E. Schulz

IPC: G05F1/00

CPC classification number: H02M1/32 ,  H02M3/33576 ,  H02M3/3378

Abstract: A method of operating an isolated bi-directional dc/dc converter to provide voltage regulation at a no-load condition over a wide voltage range and also provide overshoot protection for the boost mode main switching transistors uses new boost mode drive waveforms. The new waveforms drive switches S2 and S4 to be turned off during boost mode and only S1 and S3 are switched to provide reverse energy flow at no-load. In boost mode, C1 and C2 provide overshoot protection caused by leakage inductance of the isolation transformer when boost mode drive transistors turn off during forward energy flow and provide stored energy for reverse energy flow during reverse energy flow periods used for voltage regulation in the boost mode. In buck mode, C1 and C2 provide soft switching for buck mode main switching transistors S2 and S4.

Abstract translation: 一种隔离双向dc / dc转换器的运行方式，可在宽电压范围内的无负载状态下提供电压调节，并为升压模式主开关晶体管提供过冲保护，采用新的升压模式驱动波形。 新的波形驱动开关S 2和S 4在升压模式下关闭，只有S 1和S 3被切换以在空载时提供反向能量流。 在升压模式下，当升压模式驱动晶体管在正向能量流动期间关断时，C 1和C 2提供由隔离变压器的漏感引起的过冲保护，并在用于电压调节的反向能量流期间提供反向能量流的存储能量 升压模式。 在降压模式下，C 1和C 2为降压模式主开关晶体管S 2和S 4提供软开关。

公开(公告)号：US20070129010A1

公开(公告)日：2007-06-07

申请号：US11673384

申请日：2007-02-09

Applicant: Keming Chen

Inventor： Keming Chen

IPC: H04B7/185 ,  H04B1/04

CPC classification number: B32B5/26 ,  A45D34/00 ,  A45D2200/1018 ,  A45D2200/1036 ,  A47L13/16 ,  B08B1/00 ,  B32B5/08 ,  B32B2262/0261 ,  B32B2432/00 ,  C11D17/049 ,  D04H1/4374 ,  D04H1/559 ,  D04H1/728 ,  Y10T442/2041 ,  Y10T442/2049 ,  Y10T442/2139 ,  Y10T442/2402 ,  Y10T442/2508 ,  Y10T442/277 ,  Y10T442/3065 ,  Y10T442/614 ,  Y10T442/615 ,  Y10T442/626

Abstract: A method and system for controlling an output signal power level of a wireless transmitter can be created by detecting the signal power level of the transmitter with a detector, selectively attenuating the output signal power level with an attenuator having variable attenuation levels, and monitoring the output signal power level and comparing the output signal power level, as determined by the detector, to a predetermined threshold with a processor. The processor preferably controls the attenuator in accordance with the comparison of the output signal power level and the predetermined threshold.

Abstract translation: 可以通过用检测器检测发射机的信号功率电平来创建用于控制无线发射机的输出信号功率电平的方法和系统，用具有可变衰减电平的衰减器选择性地衰减输出信号功率电平，并监视输出 信号功率电平，并将由检测器确定的输出信号功率电平与处理器进行比较。 处理器优选地根据输出信号功率电平与预定阈值的比较来控制衰减器。

公开(公告)号：US20070070664A1

公开(公告)日：2007-03-29

申请号：US11236858

申请日：2005-09-27

Applicant: Keming Chen

Inventor： Keming Chen

IPC: H02M3/24

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：US20070029982A1

公开(公告)日：2007-02-08

申请号：US11195855

申请日：2005-08-02

Applicant: Keming Chen

Inventor： Keming Chen

IPC: H02M3/335 ,  G05F1/613

CPC classification number: H02M3/33569 ,  H02M1/36

Abstract: A boost control module operates semiconductor switches of a boost converter circuit in an avalanche mode to precharge a boost output capacitor. The boost control module comprises a switching module that complementarily transitions a first semiconductor switch and a second semiconductor switch between ON and OFF states when a current does not exceed a maximum current threshold. The switching module transitions the first semiconductor switch and the second semiconductor switch to the OFF state when the current exceeds the maximum current threshold. The switching module maintains the first semiconductor switch and the second semiconductor switch in the OFF state until at least one of the inductor current is less than or equal to a minimum current threshold.

Abstract translation: 升压控制模块以雪崩模式操作升压转换器电路的半导体开关，以对升压输出电容器进行预充电。 升压控制模块包括开关模块，当电流不超过最大电流阈值时，该开关模块在第一半导体开关和第二半导体开关之间在接通和断开状态之间互相转换。 当电流超过最大电流阈值时，开关模块将第一半导体开关和第二半导体开关转换到OFF状态。 开关模块将第一半导体开关和第二半导体开关保持在OFF状态，直到电感器电流中的至少一个小于或等于最小电流阈值。

公开(公告)号：US5414613A

公开(公告)日：1995-05-09

申请号：US110100

申请日：1993-08-20

Applicant: Keming Chen

Inventor： Keming Chen

IPC: H02M1/34 ,  H02M3/158 ,  H02M7/217 ,  H03K17/0814 ,  H02H7/125

CPC classification number: H02M1/34 ,  H02M1/4216 ,  H02M3/158 ,  H02M7/2173 ,  H03K17/08142 ,  H03K17/08148 ,  H02M2001/342 ,  Y02B70/126 ,  Y02B70/1491

Abstract: A snubber network for a power conversion circuit operated in discontinuous conduction mode includes a snubber capacitor, an isolation diode and an active reset circuit. The snubber capacitor is connected to the output of the isolation diode, both of which are connected across a main switch of the power conversion circuit. The active reset circuit, connected between the input and output of the isolation diode as well as the input and output of a boost diode, is responsive to a reset signal for active resetting of the snubber capacitor within the normal boost cycle of the power conversion circuit. Upon receipt of the reset signal, energy held by the snubber capacitor is recovered by the reset circuit and subsequently transferred to the output of the power conversion circuit with turn-off of the main switch of the power conversion circuit. This occurs contemporaneous with the power conversion circuit's delivery of converted power to its output. With the snubber network, soft switching is provided for both the main switch and a snubber switch within the active reset circuit.

Abstract translation: 用于以不连续导通模式操作的功率转换电路的缓冲器网络包括缓冲电容器，隔离二极管和有源复位电路。 缓冲电容器连接到隔离二极管的输出，两者均连接在电源转换电路的主开关上。 连接在隔离二极管的输入和输出以及升压二极管的输入和输出之间的有源复位电路响应于在功率转换电路的正常升压周期内缓冲电容器的有源复位的复位信号 。 在接收到复位信号时，由缓冲电容器保持的能量由复位电路恢复，随后通过电源转换电路的主开关的关断转移到功率转换电路的输出端。 这与电力转换电路的转换功率输出到其输出同时发生。 使用缓冲网络，主动开关和有源复位电路中的缓冲开关都提供软开关。