公开(公告)号：US20120243274A1

公开(公告)日：2012-09-27

申请号：US13380082

申请日：2010-06-29

申请人： Chunmei Feng ,  Veimar Yobany Moreno-Castañeda ,  Richard Stuart Webb ,  Jeremy Stephen Prevost Knight

发明人： Chunmei Feng ,  Veimar Yobany Moreno-Castañeda ,  Richard Stuart Webb ,  Jeremy Stephen Prevost Knight

IPC分类号： H02M7/08

CPC分类号： H02M7/23

摘要： A method is described for controlling a plurality of power converters 1, 2 connected in parallel between an ac arrangement 12 and a common dc link 16, each of the power converters 1, 2 operating in accordance with a pulse width modulation (PWM) strategy and having an independently variable dc link reference voltage. The method comprises modifying an output voltage droop characteristic of at least one of the plurality of parallel-connected power converters 1, 2 by varying the dc link reference voltage of the at least one power converter 1, 2 based on the output current of the at least one power converter 1, 2 and the average of the output currents of the plurality of power converters 1, 2.

摘要翻译： 描述了一种用于控制在交流装置12和公共直流链路16之间并联连接的多个功率转换器1,2的方法，每个功率转换器1,2根据脉冲宽度调制（PWM）策略操作， 具有独立可变的直流链路参考电压。 该方法包括通过基于所述至少一个功率转换器1,2的输出电流改变至少一个功率转换器1,2的直流链路参考电压来修改多个并联功率转换器1,2中的至少一个的输出电压下降特性。 至少一个功率转换器1,2和多个功率转换器1,2的输出电流的平均值。

公开(公告)号：US08787048B2

公开(公告)日：2014-07-22

申请号：US13380532

申请日：2010-06-29

申请人： Veimar Yobany Moreno-Castañeda ,  Chunmei Feng ,  Jeremy Stephen Prevost Knight ,  Richard Stuart Webb

发明人： Veimar Yobany Moreno-Castañeda ,  Chunmei Feng ,  Jeremy Stephen Prevost Knight ,  Richard Stuart Webb

IPC分类号： H02M7/00

CPC分类号： H02M7/23

摘要： A method is described for controlling a plurality of parallel-connected power converters 20a, 20b, each of which operates in accordance with a pulse width modulation (PWM) strategy defined by an independent voltage carrier signal and an independently controllable modulating sinusoidal voltage signal which are used to generate a PWM command signal for each PWM strategy. The voltage carrier signals of the PWM strategies have the same switching period and desynchronisation of the PWM command signals causes an unwanted circulating current to flow between the power converters 20a, 20b. The method thus comprises providing the independently controllable modulating sinusoidal voltage signal of the PWM strategy of at least one of the plurality of power converters 20a, 20b with a dc voltage offset to modify the PWM command signal of the at least one power converter and thereby increase the synchronisation of the PWM command signals so that the magnitude of any unwanted circulating current is reduced. The typically determined based on the magnitude of the circulating current flowing between the parallel-connected power converters 20a, 20b.

摘要翻译： 描述了一种用于控制多个并联电力转换器20a，20b的方法，每个电力转换器20a，20b根据由独立电压载波信号和独立可控的调制正弦电压信号定义的脉宽调制（PWM）策略进行操作， 用于为每个PWM策略生成PWM指令信号。 PWM策略的电压载波信号具有相同的开关周期，并且PWM指令信号的去同步使得不期望的循环电流在功率转换器20a，20b之间流动。 因此，该方法包括提供具有直流电压偏移的多个功率转换器20a，20b中的至少一个功率转换器20a，20b的PWM策略的独立可控的调制正弦电压信号，以修改至少一个功率转换器的PWM命令信号，从而增加 PWM命令信号的同步，使得任何不需要的循环电流的幅度减小。 通常基于在并联功率转换器20a，20b之间流动的循环电流的大小来确定。

公开(公告)号：US4431783A

公开(公告)日：1984-02-14

申请号：US315265

申请日：1981-10-26

申请人： Robert W. Walker ,  John Stuart-Webb

发明人： Robert W. Walker ,  John Stuart-Webb

IPC分类号： C08F14/00 ,  C08F2/00 ,  C08F2/20 ,  C08F14/06

CPC分类号： C08F2/004

摘要： Polymerization of vinyl chloride in aqueous suspension using a polymerization reactor having adherently deposited on internal surfaces thereof a build-up suppressant coating comprising a product of build-up suppressant activity formable by (and preferably formed by) the condensation of an effective 1-naphthol (preferably 1-naphthol itself) and formaldehyde. The condensation is preferably effected in a base-catalyzed reaction; it may also (less preferably) be effected in an acid-catalyzed reaction. The coating product itself and a process for its production are also claimed.

摘要翻译： 使用在其内表面附着沉积的聚合反应器聚合氯乙烯在聚合反应器中的增殖抑制剂涂层，其包含由有效1-萘酚（优选由 优选1-萘酚本身）和甲醛。 缩合优选在碱催化反应中进行; 也可以（更不优选）在酸催化的反应中进行。 涂料产品本身及其生产方法也被要求保护。

公开(公告)号：US4296217A

公开(公告)日：1981-10-20

申请号：US14249

申请日：1979-02-22

申请人： John Stuart-Webb

发明人： John Stuart-Webb

IPC分类号： C08L81/00 ,  C08G65/38 ,  C08G65/48 ,  C08G75/00 ,  C08G75/20 ,  C08G75/23 ,  C08L1/00 ,  C08L27/00 ,  C08L81/06 ,  C09D181/06 ,  C09J181/06

CPC分类号： C09J181/06 ,  C08G65/38 ,  C08G65/48 ,  C08G75/20 ,  C08G75/23 ,  C08L81/06 ,  C09D181/06 ,  Y10T428/31504

摘要： Aromatic polyethersulphones that are particularly useful as adhesives and coatings having end groups of formula --OCH.sub.2 COR, where R is alkyl or alkoxy. Preferred examples are --OCH.sub.2 COCH.sub.3 and --OCH.sub.2 COOC.sub.2 H.sub.5. Such polymers may be made by heating polyethersulphones made from halophenates or bisphenate/dihalide mixtures, in the presence of a reagent of formula XCH.sub.2 COR (X is halogen, preferably chlorine), such as chloroacetone or ethyl chloroacetate, for a short period of time. Such polymers of molecular weight (RV

摘要翻译： 作为具有式-OCH 2 COR的端基的粘合剂和涂层特别有用的芳族聚醚砜，其中R是烷基或烷氧基。 优选的实例是-OCH 2 COCH 3和-OCH 2 COOC 2 H 5。 这样的聚合物可以通过在式XCH2COR（X是卤素，优选氯）的试剂，例如氯丙酮或氯乙酸乙酯的存在下，将由卤代苯甲酸酯或双酚/二卤化物混合物制成的聚醚砜加热制备，短时间内。 这种分子量（RV <0.25）的聚合物在包含分散在聚醚砜的溶液或分散体中的氟碳聚合物的分散体的涂料组合物中特别有用。

公开(公告)号：US4290144A

公开(公告)日：1981-09-15

申请号：US114170

申请日：1980-01-22

申请人： J. Stuart Webb

发明人： J. Stuart Webb

IPC分类号： H04B1/10 ,  H04B7/00 ,  H04B7/15 ,  H04B7/185 ,  H04B7/26 ,  H04B15/00 ,  H04B1/00

CPC分类号： H04B7/18506

摘要： A radio communications system for aircraft, particularly useful at UHF frequencies and in aircraft travelling at high speed and low level where rapid phase and amplitude fluctuations degrade intelligible speech transmission. The system comprises a transmitter in a first aircraft, the transmitter including an upshift frequency translator for transferring the frequency band of an input signal from a microphone to a higher band, and further including an amplitude modulator for modulating the frequency translated signals; and a receiver in a second aircraft arranged to receive and demodulate the transmitted signals, the receiver including a high pass filter for removing noise from the demodulated signal, and a downshift frequency translator for transferring the frequency band of the filter output to a lower band.

摘要翻译： 一种用于飞机的无线电通信系统，在UHF频率和在高速和低电平行驶的飞机中特别有用，其中快速相位和幅度波动降低可理解的语音传输。 该系统包括第一飞行器中的发射机，发射机包括用于将输入信号的频带从麦克风转移到较高频带的升档频率转换器，并且还包括用于调制频率转换信号的振幅调制器; 以及布置成接收和解调所发送的信号的第二飞行器中的接收机，所述接收机包括用于从解调信号中去除噪声的高通滤波器，以及用于将滤波器输出的频带传送到较低频带的降档频率转换器。

公开(公告)号：US20240252711A1

公开(公告)日：2024-08-01

申请号：US18605373

申请日：2024-03-14

申请人： Jonathan HIBBARD ,  Stuart WEBB ,  Glen John TYRRELL ,  Samuel WAKERLEY ,  Jacob WAKERLEY ,  James BROWBANK ,  Sebastian LEONTIES ,  Joel BOND

发明人： Jonathan HIBBARD ,  Stuart WEBB ,  Glen John TYRRELL ,  Samuel WAKERLEY ,  Jacob WAKERLEY ,  James BROWBANK ,  Sebastian LEONTIES ,  Joel BOND

IPC分类号： A61L9/20

CPC分类号： A61L9/20 ,  A61L2209/134 ,  A61L2209/14

摘要： Disclosed herein are stages for a disinfection apparatus. Each stage may include one or more emitters configured to emit electromagnetic energy (e.g., ultraviolet light or infrared light or both) upon a fluid flow and/or one or more filters configured to filter the fluid flow. Also disclosed herein are disinfection apparatuses and methods for imparting electromagnetic energy upon a fluid flow. In some variations, the disinfection apparatus includes emitters configured to emit ultraviolet light or infrared light or both upon the fluid flow. A filter of the disinfection apparatus is configured to filter the fluid flow. A body of the disinfection apparatus defines a tortuous flow path delineating at least two turns such that the fluid flow changes direction at least twice as the fluid flow proceeds through the tortuous flow path.

公开(公告)号：US20120155131A1

公开(公告)日：2012-06-21

申请号：US13380532

申请日：2010-06-29

申请人： Veimar Yobany Moreno-Castañeda ,  Chunmei Feng ,  Jeremy Stephen Prevost Knight ,  Richard Stuart Webb

发明人： Veimar Yobany Moreno-Castañeda ,  Chunmei Feng ,  Jeremy Stephen Prevost Knight ,  Richard Stuart Webb

IPC分类号： H02M7/04

CPC分类号： H02M7/23

摘要： A method is described for controlling a plurality of parallel-connected power converters 20a, 20b, each of which operates in accordance with a pulse width modulation (PWM) strategy defined by an independent voltage carrier signal and an independently controllable modulating sinusoidal voltage signal which are used to generate a PWM command signal for each PWM strategy. The voltage carrier signals of the PWM strategies have the same switching period and desynchronisation of the PWM command signals causes an unwanted circulating current to flow between the power converters 20a, 20b. The method thus comprises providing the independently controllable modulating sinusoidal voltage signal of the PWM strategy of at least one of the plurality of power converters 20a, 20b with a dc voltage offset to modify the PWM command signal of the at least one power converter and thereby increase the synchronisation of the PWM command signals so that the magnitude of any unwanted circulating current is reduced. The typically determined based on the magnitude of the circulating current flowing between the parallel-connected power converters 20a, 20b.

摘要翻译： 描述了一种用于控制多个并联电力转换器20a，20b的方法，每个电力转换器20a，20b根据由独立电压载波信号和独立可控的调制正弦电压信号定义的脉宽调制（PWM）策略进行操作， 用于为每个PWM策略生成PWM指令信号。 PWM策略的电压载波信号具有相同的开关周期，并且PWM指令信号的去同步使得不期望的循环电流在功率转换器20a，20b之间流动。 因此，该方法包括提供具有直流电压偏移的多个功率转换器20a，20b中的至少一个功率转换器20a，20b的PWM策略的独立可控的调制正弦电压信号，以修改至少一个功率转换器的PWM命令信号，从而增加 PWM命令信号的同步，使得任何不需要的循环电流的幅度减小。 通常基于在并联功率转换器20a，20b之间流动的循环电流的大小来确定。

公开(公告)号：US20060150549A1

公开(公告)日：2006-07-13

申请号：US11035548

申请日：2005-01-13

申请人： Alan Webb ,  Stuart Webb ,  Phillip Webb ,  Charles Webb

发明人： Alan Webb ,  Stuart Webb ,  Phillip Webb ,  Charles Webb

IPC分类号： E04B1/00 ,  E04C2/00

CPC分类号： B32B15/08 ,  B32B3/28 ,  B32B15/082 ,  B32B15/18 ,  B32B2250/02 ,  B32B2307/4026 ,  B32B2307/71 ,  B32B2419/00 ,  E04B1/08 ,  E04C2/08 ,  E04C2/26 ,  E04C2/322 ,  Y10T29/49826 ,  Y10T29/49906 ,  Y10T156/10 ,  Y10T428/24537 ,  Y10T428/24545 ,  Y10T428/2457 ,  Y10T428/24628 ,  Y10T428/24694 ,  Y10T428/24711 ,  Y10T428/31678 ,  Y10T428/31692

摘要： An environmentally resilient building product of a vinyl laminated formed-sheet metallic substrate wherein the vinyl laminate is adhesively attached to the formed-sheet metallic substrate to provide a durable and attractive surface. Possible decorative and resilient surfaces include, but are not limited to solid colors, metallic finishes, and graphical images or patterns, all available in a variety of textures.

摘要翻译： 一种乙烯基层压成形片金属基材的环保型建筑产品，其中乙烯基层压材料粘附到成形片金属基材上，以提供耐用和有吸引力的表面。 可能的装饰性和弹性表面包括但不限于纯色，金属饰面和图形图案或图案，均可以各种纹理。

公开(公告)号：US5367170A

公开(公告)日：1994-11-22

申请号：US973745

申请日：1992-11-09

申请人： Stuart Webb ,  Tapio Yrjonen ,  Tuula Stark ,  Timo Oikari

发明人： Stuart Webb ,  Tapio Yrjonen ,  Tuula Stark ,  Timo Oikari

IPC分类号： G01T1/204

CPC分类号： G01T1/204

摘要： A method and a liquid scintillation counter for measuring a sample, a mixture of the specimen to be analysed and a scintillator, in a liquid scintillation counter where the sample (14) is measured with two photo multiplier tubes (23, 24) situated on different sides of the sample. The photo multiplier tubes situated on different sides of the sample operate in coincidence. Asymmetric samples are measured in such a way that the counting efficiency is measured with the photo multiplier tubes (23, 24) operating in coincidence ad calculated using the amount of coincidence pulses, whereas the amplitude and the pulse height distribution are measured only with one photo multiplier tube (23 or 24).

摘要翻译： 一种在液体闪烁计数器中测量样品，待分析样品和闪烁体的混合物的方法和液体闪烁计数器，其中样品（14）用位于不同的两个光电倍增管（23,24）进行测量 样品侧面。 位于样品不同侧的光电倍增管以巧合运行。 以这样的方式测量非对称样品，即使用一致的光电倍增管（23,24）测量计数效率，并使用一致脉冲量来计算，而幅度和脉冲高度分布仅用一张照片测量 乘法器管（23或24）。