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：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。

公开(公告)号：US09308305B2

公开(公告)日：2016-04-12

申请号：US14308177

申请日：2014-06-18

Applicant: Keming Chen ,  Chen Chen ,  Frank Lin

Inventor： Keming Chen ,  Chen Chen ,  Frank Lin

IPC: A61N1/362 ,  A61M1/12 ,  A61M1/10

CPC classification number: A61M1/122 ,  A61M1/101 ,  A61M1/1015 ,  A61M1/1031 ,  A61M1/1086 ,  A61M1/127

Abstract: An implantable blood pump includes motor control circuitry and power electronics circuitry integrated within the implantable pump body. The motor control circuitry and power electronics circuitry is configured to energize and control motor windings to rotate the pump rotor and impeller. Additional control circuitry and power electronics circuitry may be integrated within the pump housing to energize and control magnetic bearings of a magnetic levitation pump. A percutaneous cable coupled between the implantable blood pump and an extracorporeal monitor includes a reduced number of leads to provide power and control signals to the implantable blood pump. Wireless communication between the extracorporeal monitor and the integrated power electronics and control circuitry facilitates the use of a percutaneous cable with as few as two leads for providing power to the implantable pump.

Abstract translation: 可植入血液泵包括集成在可植入泵体内的马达控制电路和电力电子电路。 电动机控制电路和电力电子电路被配置为激励和控制电动机绕组以使泵转子和叶轮旋转。 附加的控制电路和电力电子电路可以集成在泵壳体内以激励和控制磁悬浮泵的磁轴承。 耦合在可植入血液泵和体外监测器之间的经皮电缆包括减少数量的引线以向可植入血液泵提供功率和控制信号。 体外监测器和集成电力电子和控制电路之间的无线通信有助于使用具有少至两个引线的经皮电缆，以向可植入泵提供电力。

公开(公告)号：US08058744B2

公开(公告)日：2011-11-15

申请号：US12256758

申请日：2008-10-23

Applicant: Keming Chen ,  Stephen Raiser ,  George R. Woody

Inventor： Keming Chen ,  Stephen Raiser ,  George R. Woody

IPC: B60L1/00

CPC classification number: H02J7/1438 ,  B60L11/1811 ,  B60L11/1887 ,  B60L2210/14 ,  H02J7/1423 ,  H02J7/345 ,  H02J2001/004 ,  Y02T10/7005 ,  Y02T10/7072 ,  Y02T10/7225 ,  Y02T10/92 ,  Y02T90/127 ,  Y02T90/14 ,  Y02T90/34 ,  Y10T307/675

Abstract: Systems and methods are provided for an on-demand boost converter for use in a vehicle. An automotive drive system comprises a boost converter having an input node, a first output node associated with a first boost leg, and a second output node associated with a second boost leg. A fuel cell is coupled to the input node of the boost converter and a battery is coupled to the first output node. An inverter module is coupled to the second output node, and a vehicle traction drive unit is coupled the inverter module. A first switch is coupled between the second output node and the first output node, wherein the battery provides energy to the second output node when the first switch is closed.

Abstract translation: 为用于车辆的按需升压转换器提供系统和方法。 汽车驱动系统包括升压转换器，其具有输入节点，与第一升压支路相关联的第一输出节点和与第二升压支路相关联的第二输出节点。 燃料电池耦合到升压转换器的输入节点，并且电池耦合到第一输出节点。 逆变器模块耦合到第二输出节点，并且车辆牵引驱动单元联接到逆变器模块。 第一开关耦合在第二输出节点和第一输出节点之间，其中当第一开关闭合时，电池向第二输出节点提供能量。

公开(公告)号：US07859381B2

公开(公告)日：2010-12-28

申请号：US12217424

申请日：2008-07-05

Applicant: Keming Chen ,  Mike Kirkland ,  Michael A. Quan

Inventor： Keming Chen ,  Mike Kirkland ,  Michael A. Quan

IPC: H01F5/00 ,  H01F21/04 ,  H01F21/02 ,  H01F27/28 ,  H01F27/30

CPC classification number: H01F30/02 ,  H01F27/22 ,  H01F27/2804

Abstract: An autotransformer for use in low frequency, high power applications that uses a stack of printed wire boards constructed of a top, inner, and bottom layer including electrical trace windings circumventing the transformer core and formed in the inner layer for direct thermal contact with a heat sink interface providing a uniform and consistent heat path down to the heat sink plate. The autotransformer further includes a board to board connection employing solder cups to electrically connect between predetermined printed wire board traces. The printed wire board autotransformer also may use a non-planar interface for thermal interface with a non-planar heat sink plate surface.

Abstract translation: 一种用于低频，大功率应用中的自耦变压器，其使用由顶部，内部和底部层构成的印刷线路板堆叠，其包括围绕变压器铁芯并形成在内层中的电迹线绕组，用于与热量直接热接触 水槽接口，提供均匀且一致的热通道，直到散热板。 自耦变压器还包括使用焊锡杯电连接在预定的印刷线路板迹线之间的板对板连接。 印刷线路板自耦变压器还可以使用非平面界面来与非平面散热板表面进行热界面。

公开(公告)号：US07742317B2

公开(公告)日：2010-06-22

申请号：US11960253

申请日：2007-12-19

Applicant: Keming Chen ,  Douglas S. Carlson ,  Sung Chung

Inventor： Keming Chen ,  Douglas S. Carlson ,  Sung Chung

IPC: H02M3/335 ,  H02M7/537

CPC classification number: H02M1/36 ,  H02M3/33569 ,  H02M2001/0022

Abstract: A method and apparatus for precharging a DC to DC power converter system is provided. The system includes a boost circuit for generating a boosted output voltage from an input voltage. The input voltage is monitored. A predetermined current limit is compared to a current in the boost circuit, and the current limited is increased when the input voltage is greater than a predetermined value.

Abstract translation: 提供一种用于对DC-DC功率转换器系统进行预充电的方法和装置。 该系统包括用于从输入电压产生升压的输出电压的升压电路。 监控输入电压。 将预定电流限制与升压电路中的电流进行比较，并且当输入电压大于预定值时，限制电流增加。

公开(公告)号：US07710322B1

公开(公告)日：2010-05-04

申请号：US11331229

申请日：2006-01-13

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。