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公开(公告)号：US20130063070A1
公开(公告)日：2013-03-14
申请号：US13293757
申请日：2011-11-10
CPC分类号： H02P27/14 , H02M5/4585 , H02M7/487
摘要： The present invention provides a medium voltage variable frequency driving system, including a three-phase switch-mode rectification module, a multilevel inverter and a high-capacity capacitor module. The three-phase switch-mode rectification module is coupled with a three-phase electrical grid, for converting an AC voltage input with a fixed operating frequency on the three-phase electrical grid into a DC voltage. The multilevel inverter is used for converting the DC voltage into an AC voltage with a required variable frequency, so as to drive an induction motor. The high-capacity capacitor module is coupled between the three-phase switch-mode rectification module and the multilevel inverter, for temporarily storing the DC voltage. In the present invention, a three-phase switch-mode rectification technology is used at the front-end rectifier, and a diode-clamped three-level inverter is adapted correspondingly at the rear-end inverter.
摘要翻译： 本发明提供一种中压变频驱动系统，包括三相开关模式整流模块，多电平逆变器和大容量电容模块。 三相开关模式整流模块与三相电网耦合，用于将三相电网上固定工作频率的交流电压输入转换成直流电压。 多电平逆变器用于将直流电压转换成具有所需可变频率的交流电压，以驱动感应电动机。 高容量电容器模块耦合在三相开关模式整流模块和多电平逆变器之间，用于暂时存储直流电压。 在本发明中，前端整流器采用三相开关模式整流技术，二相钳位三电平逆变器适用于后端逆变器。
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2.发明授权公开(公告)号：US09231406B2
公开(公告)日：2016-01-05
申请号：US13430722
申请日：2012-03-27
摘要： A mid-voltage variable-frequency driving system and a total harmonic distortion compensation control method are provided in this invention. The mid-voltage variable-frequency driving system includes a total harmonic distortion compensation unit. The total harmonic distortion compensation unit is used to perform an optimal adjustment on a reactive component reference value of a grid-side phase current, such that a harmonic component of the grid-side phase current may be reduced and a power factor of a three-phase switch-mode rectifier module within the mid-voltage variable-frequency driving system may be maintained.
摘要翻译： 本发明提供了中压变频驱动系统和总谐波失真补偿控制方法。 中压变频驱动系统包括总谐波失真补偿单元。 总谐波失真补偿单元用于对电网侧相电流的无功分量基准值进行最佳调整，从而可以减小电网侧相电流的谐波分量， 可以保持中压变频驱动系统内的相位开关模式整流模块。
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公开(公告)号：US08811048B2
公开(公告)日：2014-08-19
申请号：US13293757
申请日：2011-11-10
CPC分类号： H02P27/14 , H02M5/4585 , H02M7/487
摘要： The present invention provides a medium voltage variable frequency driving system, including a three-phase switch-mode rectification module, a multilevel inverter and a high-capacity capacitor module. The three-phase switch-mode rectification module is coupled with a three-phase electrical grid, for converting an AC voltage input with a fixed operating frequency on the three-phase electrical grid into a DC voltage. The multilevel inverter is used for converting the DC voltage into an AC voltage with a required variable frequency, so as to drive an induction motor. The high-capacity capacitor module is coupled between the three-phase switch-mode rectification module and the multilevel inverter, for temporarily storing the DC voltage. In the present invention, a three-phase switch-mode rectification technology is used at the front-end rectifier, and a diode-clamped three-level inverter is adapted correspondingly at the rear-end inverter.
摘要翻译： 本发明提供一种中压变频驱动系统，包括三相开关模式整流模块，多电平逆变器和大容量电容模块。 三相开关模式整流模块与三相电网耦合，用于将三相电网上固定工作频率的交流电压输入转换成直流电压。 多电平逆变器用于将直流电压转换成具有所需可变频率的交流电压，以驱动感应电动机。 高容量电容器模块耦合在三相开关模式整流模块和多电平逆变器之间，用于暂时存储直流电压。 在本发明中，前端整流器采用三相开关模式整流技术，二相钳位三电平逆变器适用于后端逆变器。
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4.发明授权Three-phase rectification module, the system thereof and harmonic suppression method 有权三相整流模块，其系统和谐波抑制方法公开(公告)号：US08971068B2
公开(公告)日：2015-03-03
申请号：US13466739
申请日：2012-05-08
申请人： Boyu Pu , Jinping Zhou , Yi Zhang , Wei Chen
发明人： Boyu Pu , Jinping Zhou , Yi Zhang , Wei Chen
CPC分类号： H02M1/126 , H02M7/487 , H02M2007/2195 , H02P27/06 , Y02B70/1408 , Y02P80/112
摘要： A three-phase rectification module, the system thereof and harmonic suppression method are provided. The module includes an LCL filter unit, a Vienna rectifier coupled to the LCL filter unit, and a rectifier control unit for controlling the power factor of the three-phase AC power source and the DC output voltage of the Vienna rectifier. A commutation diode is serially connected on the bridge-arm of each set of uni-directional rectification branches which are included in the Vienna rectifier, making it function as current uni-directionally. Herein, the power factor of the three-phase AC power source is matched with the parameters of the LCL filter unit, such that the absolute value of the phase difference between the AC input voltage and the current of the Vienna rectifier is close or equal to zero.
摘要翻译： 提供三相整流模块及其系统和谐波抑制方法。 该模块包括LCL滤波器单元，耦合到LCL滤波器单元的维也纳整流器，以及用于控制三相AC电源的功率因数和维也纳整流器的DC输出电压的整流器控制单元。 在维也纳整流器中包含的每组单向整流分支的桥臂上串联连接一个换向二极管，使其单向电流工作。 这里，三相AC电源的功率因数与LCL滤波器单元的参数相匹配，使得AC输入电压与维也纳整流器的电流之间的相位差的绝对值接近或等于 零。
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5.发明申请THREE-PHASE RECTIFICATION MODULE, THE SYSTEM THEREOF AND HARMONIC SUPPRESSION METHOD 有权三相整流模块及其系统及谐波抑制方法公开(公告)号：US20130083571A1
公开(公告)日：2013-04-04
申请号：US13466739
申请日：2012-05-08
申请人： Boyu Pu , Jinping Zhou , Yi Zhang , Wei Chen
发明人： Boyu Pu , Jinping Zhou , Yi Zhang , Wei Chen
IPC分类号： H02M1/12
CPC分类号： H02M1/126 , H02M7/487 , H02M2007/2195 , H02P27/06 , Y02B70/1408 , Y02P80/112
摘要： A three-phase rectification module, the system thereof and harmonic suppression method are provided. The module includes a LCL filter unit, a three-phase uni-directional rectification unit coupled to the LCL filter unit, and a rectifier control unit for controlling power factor of three-phase AC power source and DC output voltage of the three-phase uni-directional rectification unit. A commutation diode is serially connected on the bridge-arm of each set of uni-directional rectification branch which is included in the three-phase uni-directional rectification unit, making it function as current uni-direction. Herein, the power factor of the three-phase AC power source is matched with the parameters of the LCL filter unit, such that the absolute value of the phase difference between AC input voltage and current of the three-phase uni-directional rectification unit is close or equal to a preset threshold.
摘要翻译： 提供三相整流模块，其系统和谐波抑制方法。 该模块包括LCL滤波器单元，耦合到LCL滤波器单元的三相单向整流单元，以及用于控制三相交流电源的功率因数和三相单相直流输出电压的整流器控制单元 双向整流单元。 整流二极管串联连接在三相单向整流单元中的每组单向整流分支的桥臂上，使其作为当前的单向功能。 这里，三相交流电源的功率因数与LCL滤波器单元的参数相匹配，使得三相单向整流单元的交流输入电压与电流之间的相位差的绝对值为 接近或等于预设阈值。
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6.发明授权公开(公告)号：US12077787B2
公开(公告)日：2024-09-03
申请号：US17469899
申请日：2021-09-09
申请人： Haiqin Chen , Wei Chen , Xin Tang , Jun Cao , Jianxin Zhao , Yongquan Chen , Hao Zhang
发明人： Haiqin Chen , Wei Chen , Xin Tang , Jun Cao , Jianxin Zhao , Yongquan Chen , Hao Zhang
IPC分类号： C12N9/10 , C12P7/6445
CPC分类号： C12N9/1029 , C12P7/6445 , C12Y203/0102
摘要： Disclosed is a diacylglycerol acyltransferase 1, a recombinant Saccharomyces cerevisiae containing the diacylglycerol acyltransferase 1, and application thereof in production of triacylglycerol. The diacylglycerol acyltransferase 1 of the invention has a function of catalyzing synthesis of triacylglycerol. After the recombinant Saccharomyces cerevisiae containing the diacylglycerol acyltransferase 1 of the invention is subjected to induction culture for 48 h, the content of total fatty acid and triacylglycerol in the recombinant Saccharomyces cerevisiae containing the diacylglycerol acyltransferase 1 can be respectively increased by 1.94 folds and 12.09 folds as compared with those of Saccharomyces cerevisiae without the recombinant diacylglycerol acyltransferase 1. The instant invention provides a method for improving the ability of microorganisms to produce polyunsaturated fatty acids (PUFAs) by means of genetic engineering.
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公开(公告)号：US20220316281A1
公开(公告)日：2022-10-06
申请号：US17223127
申请日：2021-04-06
申请人： Farhat Shaikh , Navin Sakthivel , Aaron Avagliano , Wei Chen
发明人： Farhat Shaikh , Navin Sakthivel , Aaron Avagliano , Wei Chen
摘要： An electrically conductive ceramic composite conductor configured for downhole operations includes a first portion formed from an electrically non-conductive ceramic material having a first coefficient of thermal expansion (CTE). The first portion includes an outer surface. A second portion is disposed radially inwardly of the outer surface. The second portion is formed from an electrically conductive ceramic material having a second CTE that is substantially similar to the first CTE.
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公开(公告)号：US11408163B2
公开(公告)日：2022-08-09
申请号：US16899621
申请日：2020-06-12
IPC分类号： E03F5/04
摘要： A drain floor, including a drain base, a drain body including a cavity, a drain cup, a supporting frame; and a reset member. The drain cup includes a cup body, a stem, and a base. The cup body includes a through hole, and two ends of the stem are connected to the cup body and the base, respectively. The cup body is disposed in the cavity and the base is disposed out of the cavity. The space between the drain body and the drain cup forms an annular channel, and the annular channel communicates with the through hole. The annular channel includes a water inlet and a water outlet. The reset member is connected to the drain cup and is movable with respect to the drain cup to open and close the water outlet. The supporting frame connects the drain body and the reset member.
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公开(公告)号：US20190165848A1
公开(公告)日：2019-05-30
申请号：US16309941
申请日：2017-06-07
摘要： Provided are an electronic device for a network control terminal and a network node, and a method for the electronic device. The electronic device for a network control terminal comprises processing circuitry configured to set a first condition concerning a beam-forming capacity of a network node for determining the network node capable of serving as a relay node, and to generate control signaling of indication information comprising the first condition for indicating the network node served by the network control terminal.
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