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1. 发明授权

US6118643A Modular surge suppression system and method 失效
标题翻译：模块化浪涌抑制系统及方法
公开(公告)号：US6118643A
公开(公告)日：2000-09-12
申请号：US261386
申请日：1999-03-03
申请人： Thomas J. Dyer , William B. Hawkins, II , John N. Park
发明人： Thomas J. Dyer , William B. Hawkins, II , John N. Park
IPC分类号： H01R9/24 , H01R13/514 , H01R13/66 , H02H3/22
CPC分类号： H01R13/514 , H01R9/2458 , H01R13/6666
摘要： A surge suppression module is provided for connection to a wall receptacle and interconnection with other modules. Each module includes a top portion rotatably connected to a bottom portion. A male electrical plug extends from a top surface, and a female plug from a bottom surface. The top and bottom surfaces of the top and bottom portions, respectively, form opposing top and bottom surfaces of the module when the module is in an in-line orientation with an in-line axis through the module passing through the female and male plugs. The top and bottom portions are rotatable about an axis of rotation angled at 45.degree. to the in-line axis, and rotate from the in-line orientation to a wall mounting orientation, wherein the male plug extends from a side of the module and is perpendicular to in-line axis. Surge suppression and filtering circuitry is carried within the bottom portion along with connectors for connection of electrical equipment used with the surge suppression module. An interlocking connector for interlocking one module to another includes a tab extending from the top surface and a cam carried within the bottom portion for engaging a notch within the tab and interlocking and number of adjoining modules together in an in-line styled arrangement. A foot is rotatably carried by the housing and is rotatable from a stored position to an extended position extending outward from the module for contacting a wall and aligning the module generally parallel to the wall.
摘要翻译：提供浪涌抑制模块用于连接到墙壁插座并与其他模块互连。每个模块包括可旋转地连接到底部的顶部。阳电插头从顶表面延伸，阴插头从底表面延伸。顶部和底部的顶部和底部表面分别形成模块的相对的顶部和底部表面，当模块处于具有穿过阴模和凸形插头的模块的在线轴线的在线定向时。顶部和底部可以围绕与轴线成45度角的旋转轴线旋转，并且从直线定向旋转到壁安装方向，其中阳插头从模块的侧面延伸并且是垂直于直线轴。浪涌抑制和滤波电路连同用于与浪涌抑制模块一起使用的电气设备连接的连接器在底部内承载。用于将一个模块互锁到另一个模块的联锁连接器包括从顶表面延伸的突出部和在底部内承载的凸轮，用于接合突片内的凹口，并以相互排列的排列方式将邻接的模块互锁在一起。足部由壳体可旋转地承载并且可以从存储位置旋转到从模块向外延伸的延伸位置，用于接触壁并且将模块大致平行于壁对准。

2. 发明授权

US5270657A Split gradient amplifier for an MRI system 失效
标题翻译：用于MRI系统的分离梯度放大器
公开(公告)号：US5270657A
公开(公告)日：1993-12-14
申请号：US965131
申请日：1992-10-22
申请人： William F. Wirth , Thomas G. McFarland , Robert M. Vavrek , Peter B. Roemer , Otward M. Mueller , John N. Park
发明人： William F. Wirth , Thomas G. McFarland , Robert M. Vavrek , Peter B. Roemer , Otward M. Mueller , John N. Park
IPC分类号： G01R33/385 , G01V3/00
CPC分类号： G01R33/3852
摘要： A gradient amplifier for use in magnetic resonance imaging equipment employs a low voltage DC power supply connected in series between a pair of higher voltage DC power supplies, the latter supplies serving to provide increased power for rapid gradient switching and the former supply providing correction current to produce the desired voltage output. The high voltage DC power supplies preferably comprise multiple DC units which can be combined to provide finer steps of control prior to correction by the lower voltage supply. The low voltage DC power supply preferably comprise one or more linear amplifiers connected in series, or one or more switchmode amplifiers connected in series. The DC power supplies are controlled in an open loop manner from a gradient signal that designates the desired current for the gradient coil and the amplifiers are operated in a closed loop responding to to a feedback signal from the gradient coil.
摘要翻译：用于磁共振成像设备的梯度放大器采用串联连接在一对高压直流电源之间的低压直流电源，后者用于为快速梯度切换提供增加的功率，而前一个电源提供校正电流产生所需的电压输出。高压DC电源优选地包括多个DC单元，其可以组合以在由较低电压源进行校正之前提供更精细的控制步骤。低压DC电源优选地包括串联连接的一个或多个线性放大器或串联连接的一个或多个开关模式放大器。直流电源由开路环路控制，该梯度信号指定用于梯度线圈的期望电流，并且放大器响应于来自梯度线圈的反馈信号在闭环中工作。

3. 发明授权

US4672528A Resonant inverter with improved control 失效
标题翻译：谐振逆变器具有改进的控制
公开(公告)号：US4672528A
公开(公告)日：1987-06-09
申请号：US866818
申请日：1986-05-27
申请人： John N. Park , Robert L. Steigerwald
发明人： John N. Park , Robert L. Steigerwald
IPC分类号： H02M3/337 , H02P13/20
CPC分类号： H02M3/3376 , H02M2007/53878 , Y02B70/1433 , Y02B70/1441
摘要： A resonant inverter is operated in a manner to provide a substantially constant output voltage to a load. The inverter is controlled using either a frequency control mode or a phase shift control mode. In the frequency control mode, a constant output voltage is maintained through frequency variation of the rectangular wave signal applied to the resonant circuit of the inverter. In the phase shift control mode, constant output voltage is maintained by phase shifting one component signal of the rectangular wave signal relative to another component signal thereof while maintaining constant the frequency of both component signals. Mode switching occurs automatically at the extremities of the operating frequency range of controllable switch means in the resonant inverter.
摘要翻译：谐振逆变器以向负载提供基本恒定的输出电压的方式操作。使用频率控制模式或相移控制模式控制变频器。在频率控制模式中，通过施加到逆变器的谐振电路的矩形波信号的频率变化来保持恒定的输出电压。在相移控制模式中，通过相对于其另一分量信号相移矩形波信号的一个分量信号并保持两个分量信号的频率恒定来维持恒定的输出电压。在谐振逆变器的可控开关装置的工作频率范围的末端，自动切换模式。

4. 发明授权

US4347464A FET Motor drive system 失效
标题翻译： FET电机驱动系统
公开(公告)号：US4347464A
公开(公告)日：1982-08-31
申请号：US239724
申请日：1981-03-02
申请人： John N. Park , Robert L. Steigerwald
发明人： John N. Park , Robert L. Steigerwald
IPC分类号： H02K29/08
CPC分类号： H02K29/08
摘要： A multipole permanent magnet rotor is positioned on a shaft and rotatably mounted in a multiphase stator having two windings per stator phase. A distributor comprising a pattern of conducting and non-conducting material is mounted to turn with the rotor shaft. Pickup "fingers" in contact with the distributor, gate appropriate FET's of the pairs of FET's associated with each stator phase in sequence, with timing dependent on the instantaneous shaft position, to generate a rotating flux field. A voltage across the windings provides the current for flux generation, and can be supplied by a full wave rectified single phase AC source. The speed of rotation of the motor can be controlled by varying the voltage supplied.
摘要翻译：多极永磁转子位于轴上并可旋转地安装在每个定子相中具有两个绕组的多相定子中。包括导电材料和非导电材料的图案的分配器安装成与转子轴一起转动。拾取“指”与分配器接触，按顺序选择与每个定子相位相关联的FET对，其中定时取决于瞬时轴位置，以产生旋转磁通场。绕组两端的电压提供了用于产生磁通的电流，并且可以由全波整流的单相交流电源提供。可以通过改变所提供的电压来控制电动机的旋转速度。

5. 发明授权

US07633725B2 Micro-electromechanical system based soft switching 有权
标题翻译：基于微机电系统的软开关
公开(公告)号：US07633725B2
公开(公告)日：2009-12-15
申请号：US11314879
申请日：2005-12-20
申请人： William James Premerlani , Kanakasabapathi Subramanian , Christopher Keimel , John N. Park , Ajit Achuthan , Wensen Wang , Joshua Isaac Wright , Kristina Margaret Korosi , Somashekhar Basavaraj
发明人： William James Premerlani , Kanakasabapathi Subramanian , Christopher Keimel , John N. Park , Ajit Achuthan , Wensen Wang , Joshua Isaac Wright , Kristina Margaret Korosi , Somashekhar Basavaraj
IPC分类号： H02H3/00 , H02H7/00
CPC分类号： H02H3/025 , H01H1/0036 , H01H9/40 , H01H9/54 , H01H9/56 , H01H2071/008
摘要： A system is presented. The system includes detection circuitry configured to detect occurrence of a zero crossing of an alternating source voltage or an alternating load current. The system also includes switching circuitry coupled to the detection circuitry and comprising a micro-electromechanical system switch. Additionally, the system includes control circuitry coupled to the detection circuitry and the switching circuitry and configured to perform arc-less switching of the micro-electromechanical system switch responsive to a detected zero crossing of an alternating source voltage or alternating load current.
摘要翻译：提出了一个系统。该系统包括被配置为检测交流源电压或交流负载电流的零交叉的发生的检测电路。该系统还包括耦合到检测电路并包括微机电系统开关的开关电路。另外，该系统包括耦合到检测电路和开关电路的控制电路，并被配置为响应于检测到的交流源电压或交流负载电流的过零点而执行微机电系统开关的无弧切换。

6. 发明授权

US4969076A Load compensating gain control for a series resonant inverter 失效
标题翻译：串联谐振逆变器负载补偿增益控制
公开(公告)号：US4969076A
公开(公告)日：1990-11-06
申请号：US393187
申请日：1989-08-14
申请人： Michael J. Schutten , John N. Park , Ming H. Kuo
发明人： Michael J. Schutten , John N. Park , Ming H. Kuo
IPC分类号： H02M3/28 , G05F1/563 , H02M7/5387
CPC分类号： H02M7/53871 , G05F1/563 , H02M2007/4815 , Y02B70/1441
摘要： A series resonant inverter is controlled to maintain a substantially constant gain and a substantially constant bandwidth, thereby ensuring stable operation under all operating conditions. A load compensating gain control circuit generates a unique gain or attenuation factor for each unique set of output load conditions. To maintain constant gain, inverter gain for each set of operating conditions is multiplied by the corresponding gain or attenuation factor. Bandwidth is increased (or decreased) and maintained constant to ensure stable operation.

7. 发明授权

US4876635A Series resonant inverter with lossless snubber-resetting components 失效
标题翻译：串联谐振逆变器具有无损耗缓冲器复位元件
公开(公告)号：US4876635A
公开(公告)日：1989-10-24
申请号：US288909
申请日：1988-12-23
申请人： John N. Park , Robert L. Steigerwald , Michael J. Schutten
发明人： John N. Park , Robert L. Steigerwald , Michael J. Schutten
IPC分类号： H02M3/337 , H03K17/0814
CPC分类号： H03K17/08148 , H02M3/337 , H02M2007/4815 , Y02B70/1433 , Y02B70/1441
摘要： A circuit for "resetting" snubbers in a series resonant bridge inverter maintains lossless snubber action during light-load and no-load inverter operation and during operation near resonance. Series resonant circuit operation is controlled to be above the resonant frequency to ensure operation at a lagging power factor. The snubber-resetting operation is facilitated by a relatively small inductor connected across the output terminals of the series resonant inverter.

8. 发明授权

US4339671A Proportional base drive circuit 失效
标题翻译：比例基础驱动电路
公开(公告)号：US4339671A
公开(公告)日：1982-07-13
申请号：US133489
申请日：1980-03-21
申请人： John N. Park , Robert L. Steigerwald
发明人： John N. Park , Robert L. Steigerwald
IPC分类号： H03K17/0424 , H03K17/60
CPC分类号： H03K17/0424 , H03K17/601
摘要： An improved proportional base drive circuit for rapidly and efficiently switching a high current bipolar load transistor comprises a transformer having first and second serially coupled primary windings, and first and second secondary windings coupled to the collector and to the base, respectively, of a high current load transistor for supplying the transistor with collector current and base current proportional to the collector current, respectively. A diverter circuit is coupled to the second secondary transformer winding and to the base and emitter of the load transistor. During intervals when the second transformer primary winding is effectively short circuited to initiate load transistor turn-off, the diverter circuit diverts current in the second secondary winding away from the load transistor base and also removes load transistor stored charge to effect rapid load transistor turn-off, thereby assuring reliable transistor switching.
摘要翻译：用于快速且有效地切换高电流双极性负载晶体管的改进的比例基极驱动电路包括具有第一和第二串联耦合的初级绕组的变压器，以及分别耦合到集电极和基极的第一和第二次级绕组的高电流用于向晶体管提供与集电极电流成比例的集电极电流和基极电流的负载晶体管。分流器电路耦合到第二次级变压器绕组和耦合到负载晶体管的基极和发射极。在第二变压器初级绕组有效地短路以启动负载晶体管关断的间隔期间，分流器电路将第二次级绕组中的电流转移离开负载晶体管基极，并且还去除负载晶体管存储的电荷以实现快速负载晶体管截止，从而确保可靠的晶体管切换。

9. 发明授权

US3940682A Rectifier circuits using transistors as rectifying elements 失效
标题翻译：整流电路采用晶体管作为整流元件
公开(公告)号：US3940682A
公开(公告)日：1976-02-24
申请号：US526117
申请日：1974-11-22
申请人： John N. Park , Robert L. Steigerwald , Loren H. Walker
发明人： John N. Park , Robert L. Steigerwald , Loren H. Walker
IPC分类号： H02M7/217 , H02M7/23 , H02M7/21
CPC分类号： H02M7/217
摘要： Full-wave and half-wave rectifier circuits are disclosed; the former circuit using two transistors and the latter circuit using one transistor. In both circuits transistors are connected in an inverted mode so that, for example, with an NPN transistor current flow is such that line current flows into the emitter and load current flows out of the collector. Furthermore, voltage blocking is performed by the collector-base junction instead of the emitter-base junction. High efficiency is achieved by controlling the transistor base current in response to the emitter current so that the base current is proportional to the emitter current and is also at an optimum magnitude so as to minimize circuit losses.
摘要翻译：公开了全波和半波整流电路; 前一个电路使用两个晶体管，后一个电路使用一个晶体管。在两个电路中，晶体管以反相模式连接，使得例如利用NPN晶体管电流流动使得线电流流入发射极，并且负载电流从集电极流出。此外，通过集电极 - 基极结而不是发射极 - 基极结进行电压阻断。通过响应于发射极电流控制晶体管基极电流实现高效率，使得基极电流与发射极电流成比例，并且也处于最佳幅度，以便最小化电路损耗。

10. 发明授权

US07369377B1 Snubbers for low temperature power electronics 有权
标题翻译：低温功率电子缓冲器
公开(公告)号：US07369377B1
公开(公告)日：2008-05-06
申请号：US11224184
申请日：2005-09-12
申请人： Michael J. Hennessy , John N. Park , Otward M. Mueller , Eduard K. Mueller
发明人： Michael J. Hennessy , John N. Park , Otward M. Mueller , Eduard K. Mueller
IPC分类号： H02H7/00 , H02H9/00 , H01L29/00 , H01L23/34
CPC分类号： H03K17/92 , H01L2924/0002 , H01L2924/00
摘要： Switching losses and conduction losses are isolated by networks which are partially cryogenic and partially at room temperature. Switching losses are independent of temperature. Advantageously the switching losses are taken in a snubber network at room temperature and conduction losses are incurred at cryogenic temperatures, where majority carrier devices like MOSFETs operate with ultra low on-state resistance and corresponding low conduction losses. Low loss leads carry current efficiently from the cryogenic environment to room temperature without adversely affecting refrigeration. Switch and snubber network may both operate cryogenically.
摘要翻译：开关损耗和传导损耗由部分低温部分在室温的网络隔离。开关损耗与温度无关。有利地，开关损耗在室温下在缓冲网络中进行，并且在低温下产生传导损耗，其中诸如MOSFET的多数载流子器件以超低导通状态电阻和相应的低导通损耗工作。低损耗引线可将电流从低温环境有效地运送到室温，而不会对制冷产生不利影响。开关和缓冲网络都可以低温运行。

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