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。

公开(公告)号：US20100102638A1

公开(公告)日：2010-04-29

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: H01H79/00

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：US07362077B2

公开(公告)日：2008-04-22

申请号：US11195855

申请日：2005-08-02

Applicant: Keming Chen

Inventor： Keming Chen

IPC: G05F1/00 ,  G05F1/24 ,  H02M3/335 ,  H02M7/5387 ,  H02M5/00 ,  H02M5/293

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：US20070047171A1

公开(公告)日：2007-03-01

申请号：US11209559

申请日：2005-08-23

Applicant: Keming Chen

Inventor： Keming Chen

IPC: H01G2/00

CPC classification number: H02H9/001 ,  H01L27/0248 ,  H02H7/16

Abstract: A capacitor circuit with surge protection that is selectively connected between a voltage source and a device comprises a first capacitance element has one end that communicates with a first terminal of the voltage source. A first transistor has a first terminal that communicates with an opposite end of the first capacitance element and a second terminal that communicates with a second terminal of the voltage source. A control terminal of the first transistor communicates with a capacitor enable signal that provides a controlled turn-on to limit current surge and turns off the first transistor when voltage surge is detected.

Abstract translation: 具有选择性地连接在电压源和器件之间的具有浪涌保护的电容器电路包括具有与电压源的第一端连通的一端的第一电容元件。 第一晶体管具有与第一电容元件的相对端连通的第一端子和与电压源的第二端子连通的第二端子。 第一晶体管的控制端与电容器使能信号通信，该电容使能信号提供受控接通以限制电流浪涌，并在检测到电压浪涌时关断第一晶体管。

公开(公告)号：US07106605B2

公开(公告)日：2006-09-12

申请号：US10881213

申请日：2004-06-30

Applicant: Keming Chen ,  Lateef A. Kajouke ,  James F. Lazar

Inventor： Keming Chen ,  Lateef A. Kajouke ,  James F. Lazar

IPC: H02H7/125

CPC classification number: H02M3/28 ,  H02M3/33569

Abstract: A DC-DC converter comprises an input circuit that stores inductive energy that includes a first switch that releases the stored inductive energy. A transformer includes a primary winding that communicates with the input circuit and a secondary winding. An output circuit communicates with the secondary winding and that includes first and second output conductors and a first diode that communicates with one end of the secondary winding and the first output conductor. A second diode communicates with one end of the secondary winding and the second output conductor. A third diode communicates with an opposite end of the secondary winding and the first output conductor. A fourth diode communicates with an opposite end of the secondary winding and the second output conductor. A first capacitor is connected in parallel to the third diode. A second capacitor is connected in parallel to the fourth diode.

Abstract translation: DC-DC转换器包括存储电感能的输入电路，其包括释放所存储的感应能量的第一开关。 变压器包括与输入电路和次级绕组连通的初级绕组。 输出电路与次级绕组通信，并且包括第一和第二输出导体以及与次级绕组和第一输出导体的一端连通的第一二极管。 第二二极管与次级绕组和第二输出导体的一端连通。 第三二极管与次级绕组和第一输出导体的相对端连通。 第四二极管与次级绕组和第二输出导体的相对端连通。 第一电容器并联连接到第三二极管。 第二电容器并联连接到第四二极管。

公开(公告)号：US20050041438A1

公开(公告)日：2005-02-24

申请号：US10643732

申请日：2003-08-19

Applicant: Keming Chen ,  James Lazar ,  Lateef Kajouke

Inventor： Keming Chen ,  James Lazar ,  Lateef Kajouke

IPC: H02M3/28 ,  H02M3/335 ,  H02M7/5387

CPC classification number: H02M7/5387 ,  H02M3/33592 ,  Y02B70/1475

Abstract: A DC/DC converter includes a first leg and a second leg. A controller employs hard switching in the first leg to reduce the conduction loss. The controller employs zero voltage in the second leg to reduce the switching loss.

Abstract translation: DC / DC转换器包括第一支路和第二支路。 控制器在第一支路中采用硬切换以减少导通损耗。 控制器在第二支路采用零电压来减少开关损耗。