公开(公告)号：US06380694B1

公开(公告)日：2002-04-30

申请号：US09667549

申请日：2000-09-22

申请人： Kiyoaki Uchihashi ,  Pradeep Kumar Nandam

发明人： Kiyoaki Uchihashi ,  Pradeep Kumar Nandam

IPC分类号： H05B3700

CPC分类号： H05B41/2888 ,  H05B41/2883 ,  H05B41/382 ,  Y02B20/204

摘要： A high intensity discharge (HID) lamp driving circuit. The HID lamp driving circuit includes a first pair of switching devices connected to a high frequency resonant filter, and a second pair of switching devices connected to a ripple reducing filter. A HID lamp is connected between the first pair of switching devices and second pair of switching devices, with a dc power supply being connected to the first pair of switching devices and the second pair of switching devices. The first pair of switching devices and the second pair of switching devices are connected to a common ground with the dc power supply. The lamp driving circuit operates in a half bridge topology during a start-up operation mode of the lamp, and operates in a full-bridge topology during a steady-state operation mode of the lamp. The HID lamp driving circuit is operated in an active zero current switching scheme.

摘要翻译： 高强度放电（HID）灯驱动电路。 HID灯驱动电路包括连接到高频谐振滤波器的第一对开关装置和连接到纹波降低滤波器的第二对开关装置。 HID灯连接在第一对开关装置和第二对开关装置之间，直流电源连接到第一对开关装置和第二对开关装置。 第一对开关器件和第二对开关器件通过直流电源连接到公共地。 灯驱动电路在灯的启动操作模式期间以半桥拓扑运行，并且在灯的稳态运行模式期间以全桥拓扑运行。 HID灯驱动电路以有源零电流开关方式工作。

公开(公告)号：US09106103B2

公开(公告)日：2015-08-11

申请号：US13243207

申请日：2011-09-23

申请人： Joseph Charles Paulakonis ,  Pradeep Kumar Nandam

发明人： Joseph Charles Paulakonis ,  Pradeep Kumar Nandam

IPC分类号： H02J7/00 ,  H02J7/34 ,  H02J9/06

CPC分类号： H02J7/345 ,  H02J9/062 ,  H02J2009/063 ,  Y10T307/615 ,  Y10T307/625

摘要： An uninterruptible power supply (UPS) system includes first and second busses, a first switching circuit configured to selectively couple an AC source to the first and second busses and a second switching circuit configured to selectively couple the first and second busses to a load. The system also includes a storage capacitor and a third switching circuit configured to couple the storage capacitor between the first and second busses. The system further includes a control circuit configured to control the first, second and third switching circuits to generate an AC voltage at the load.

摘要翻译： 不间断电源（UPS）系统包括第一和第二总线，第一开关电路，被配置为选择性地将AC源耦合到第一和第二总线;以及第二开关电路，被配置为选择性地将第一和第二总线耦合到负载。 该系统还包括存储电容器和第三开关电路，其被配置为将存储电容器耦合在第一和第二总线之间。 该系统还包括控制电路，其被配置为控制第一，第二和第三开关电路以在负载处产生AC电压。

公开(公告)号：US20130076141A1

公开(公告)日：2013-03-28

申请号：US13243207

申请日：2011-09-23

申请人： Joseph Charles Paulakonis ,  Pradeep Kumar Nandam

发明人： Joseph Charles Paulakonis ,  Pradeep Kumar Nandam

IPC分类号： H02J9/00 ,  H02M5/458

CPC分类号： H02J7/345 ,  H02J9/062 ,  H02J2009/063 ,  Y10T307/615 ,  Y10T307/625

摘要： An uninterruptible power supply (UPS) system includes first and second busses, a first switching circuit configured to selectively couple an AC source to the first and second busses and a second switching circuit configured to selectively couple the first and second busses to a load. The system also includes a storage capacitor and a third switching circuit configured to couple the storage capacitor between the first and second busses. The system further includes a control circuit configured to control the first, second and third switching circuits to generate an AC voltage at the load.

摘要翻译： 不间断电源（UPS）系统包括第一和第二总线，第一开关电路，被配置为选择性地将AC源耦合到第一和第二总线;以及第二开关电路，被配置为选择性地将第一和第二总线耦合到负载。 该系统还包括存储电容器和第三开关电路，其被配置为将存储电容器耦合在第一和第二总线之间。 该系统还包括控制电路，其被配置为控制第一，第二和第三开关电路以在负载处产生AC电压。

公开(公告)号：US5738177A

公开(公告)日：1998-04-14

申请号：US687309

申请日：1996-07-25

申请人： Craig A. Schell ,  James R. Parks ,  Todd A. Hagan ,  Pradeep Kumar Nandam ,  Rouse R. Bailey, Jr.

发明人： Craig A. Schell ,  James R. Parks ,  Todd A. Hagan ,  Pradeep Kumar Nandam ,  Rouse R. Bailey, Jr.

IPC分类号： B25B21/00 ,  B23P19/06 ,  B25B23/14 ,  B25B23/147 ,  B25B23/157 ,  B25F5/00 ,  B25F5/02 ,  H03K17/687

CPC分类号： B25F5/001 ,  B25B23/14 ,  B25B23/141 ,  B25B23/1415 ,  B25B23/147 ,  B25F5/02 ,  H03K17/6871

摘要： A production assembly tool for securing fasteners to a workpiece such as an automobile body. The production assembly tool of the present invention includes a housing which encases a motor, a transmission, a clutch mechanism and a control module. The control module controls the running and braking of the motor and prevents both over and under securing of a fastener caused by falsely detected tool clutch conditions. An improved clutch sensor switch is operatively associated with the control module for detecting clutch disengagement. The clutch mechanism is designed to drive the fastener until the clutch sensor switch detects clutch disengagement and signals the control circuit to stop drive and start braking. The production assembly tool further includes a system for ensuring accurate placement of the power tool motor in the power tool housing subsequent to motor servicing or repair. Further, an adjustment collar located in the tool nose allows selective access to a clutch adjustment mechanism of the tool located within the housing for torque level adjustment. In addition, the tool housing is covered by an integral, self-sealing non-marring overmold exterior. The overmold exterior allows a lubrication needle to be inserted through an aperture located beneath the overmold exterior. After the needle is removed, the overmold exterior subsequently self-seals, thereby preventing dirt from entering the interior of the tool housing and the applied lubrication from leaking.

摘要翻译： 一种用于将紧固件固定到诸如汽车车身的工件的生产组装工具。 本发明的生产装配工具包括一个外壳，其包围电动机，变速器，离合器机构和控制模块。 控制模块控制电机的运行和制动，并防止由于错误检测到的工具离合器条件而导致的紧固件的过度和过紧。 改进的离合器传感器开关与用于检测离合器分离的控制模块可操作地相关联。 离合器机构设计用于驱动紧固件，直到离合器传感器开关检测到离合器分离，并向控制电路发出信号以停止驱动并开始制动。 生产装配工具还包括一个系统，用于在马达维修或修理之后确保电动工具电机在动力工具壳体中的精确放置。 此外，位于刀尖中的调节套环允许选择性地进入位于壳体内的工具的离合器调节机构以进行扭矩水平调整。 此外，工具外壳由一体式，自密封的非破损外覆模制外壳覆盖。 包覆模制外部允许润滑针穿过位于包覆模制外部下方的孔。 在取下针之后，包覆模制外部随后自密封，从而防止灰尘进入工具壳体的内部，并且所施加的润滑剂不会泄漏。