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    • 2. 发明授权
    • Device and method for detecting crowbar circuit in wind turbine
    • 用于检测风力发电机中的短路电路的装置和方法
    • US08957664B2
    • 2015-02-17
    • US13553100
    • 2012-07-19
    • Liang CaoLi CaiYan-Song Lu
    • Liang CaoLi CaiYan-Song Lu
    • G01R29/00H02H9/00G01R31/42G01R31/24G05B19/05H01H47/00
    • G01R31/42G01R31/24G05B19/054H01H47/002
    • A device and a method for detecting a crowbar circuit in a wind turbine are provided, wherein the wind turbine comprises a converter electrically connected to the crowbar circuit, and the method comprises: electrically coupling a detection module to the crowbar circuit; inputting a first control signal into the crowbar circuit, to turn on the crowbar circuit; providing a three-phase voltage signal to the crowbar circuit via the converter, wherein voltage signals in any two adjacent phases has a predetermined phase angle difference; reading the first detection signal outputted by the detection module, to determine whether the crowbar circuit is normally thrown into the wind turbine; inputting a second control signal to the crowbar circuit, to turn off the crowbar circuit; and reading again the second detection signal outputted by the detection module, to determine whether the crowbar circuit is normally cut out from the wind turbine.
    • 提供了一种用于检测风力涡轮机中的撬棒电路的装置和方法,其中所述风力涡轮机包括电连接到所述撬棒电路的转换器,并且所述方法包括:将检测模块电连接到所述撬棒电路; 将第一控制信号输入到所述短路电路中,以接通所述撬棒电路; 通过转换器向短路电路提供三相电压信号,其中任何两个相邻相位中的电压信号具有预定的相位差; 读取由检测模块输出的第一检测信号,以确定撬棒电路是否正常地投入到风力涡轮机中; 将输入第二控制信号给短路电路,以关闭所述短路电路; 并再次读取由检测模块输出的第二检测信号,以确定是否正常地从风力涡轮机切出短路电路。
    • 3. 发明申请
    • CONVERTER SYSTEM AND CONTROL METHOD THEREOF
    • 转换器系统及其控制方法
    • US20130279222A1
    • 2013-10-24
    • US13619573
    • 2012-09-14
    • Li CAILiang CAOChang-Yong WANG
    • Li CAILiang CAOChang-Yong WANG
    • H02M1/00
    • H02M5/4585H02J3/386H02M7/493H02P21/22H02P2101/15Y02E10/763
    • A control method of a converter system includes: sampling a current of each three-phase winding to obtain a real-time current of each converter; obtaining a mean current by averaging the real-time current of each secondary converter and the real-time current of the primary converter, and transferring the mean current to each secondary converter; obtaining the differential-mode current corresponding to each secondary converter according to the mean current and the real-time current of each secondary converter; performing a circulation current control on the mean current and the differential-mode current of each secondary converter based on a d-q coordinate system to generate a mean-current conditioning signal and a differential-mode current conditioning signal, thereby controlling each secondary converter; and obtaining a sum of the differential-mode current conditioning signal of the secondary converters and negating the sum to obtain a differential-mode current conditioning signal of the primary converter, thereby controlling the primary converter.
    • 转换器系统的控制方法包括:对每个三相绕组的电流进行采样以获得每个转换器的实时电流; 通过平均每个次级转换器的实时电流和初级转换器的实时电流来获得平均电流,并将平均电流传送到每个次级转换器; 根据每个次级转换器的平均电流和实时电流获得与每个次级转换器相对应的差模电流; 基于d-q坐标系对每个次级转换器的平均电流和差模电流执行循环电流控制,以产生平均电流调节信号和差模电流调节信号,从而控制每个次级转换器; 并且获得二次转换器的差模电流调节信号的和,并且否定该和以获得初级转换器的差模电流调节信号,从而控制一次转换器。
    • 4. 发明申请
    • DEVICE AND METHOD FOR DETECTING CROWBAR CIRCUIT IN WIND TURBINE
    • 用于检测风力涡轮机中的曲轴电路的装置和方法
    • US20130076336A1
    • 2013-03-28
    • US13553100
    • 2012-07-19
    • Liang CaoLi CaiYan-Song Lu
    • Liang CaoLi CaiYan-Song Lu
    • G01R29/00
    • G01R31/42G01R31/24G05B19/054H01H47/002
    • A device and a method for detecting a crowbar circuit in a wind turbine are provided, wherein the wind turbine comprises a converter electrically connected to the crowbar circuit, and the method comprises: electrically coupling a detection module to the crowbar circuit; inputting a first control signal into the crowbar circuit, to turn on the crowbar circuit; providing a three-phase voltage signal to the crowbar circuit via the converter, wherein voltage signals in any two adjacent phases has a predetermined phase angle difference; reading the first detection signal outputted by the detection module, to determine whether the crowbar circuit is normally thrown into the wind turbine; inputting a second control signal to the crowbar circuit, to turn off the crowbar circuit; and reading again the second detection signal outputted by the detection module, to determine whether the crowbar circuit is normally cut out from the wind turbine.
    • 提供了一种用于检测风力涡轮机中的撬棒电路的装置和方法,其中所述风力涡轮机包括电连接到所述撬棒电路的转换器,并且所述方法包括:将检测模块电连接到所述撬棒电路; 将第一控制信号输入到所述短路电路中,以接通所述撬棒电路; 通过转换器向短路电路提供三相电压信号,其中任何两个相邻相位中的电压信号具有预定的相位差; 读取由检测模块输出的第一检测信号,以确定撬棒电路是否正常地投入到风力涡轮机中; 将输入第二控制信号给短路电路,以关闭所述短路电路; 并再次读取由检测模块输出的第二检测信号,以确定是否正常地从风力涡轮机切出短路电路。
    • 7. 发明申请
    • Time base correction for digitized video signal
    • 数字化视频信号的时基校正
    • US20060153530A1
    • 2006-07-13
    • US11325767
    • 2006-01-05
    • Li CaiBoon Teng
    • Li CaiBoon Teng
    • H04N5/95
    • H04N9/896
    • The present invention relates to a method for time base correction during generation of a digital video signal from an analog input video signal, and to an apparatus having means for digitizing an analog input video signal using such method. According to the invention, the method includes the steps of: receiving an analog video signal; generating a digital video signal from the analog video signal with a video decoder; storing at least a part of the digital video signal in a memory; detecting a portion of corrupt data having an abnormal field ordering in the digital video signal; either discarding the portion of corrupt data or replacing at least a part of the portion of corrupt data with previous data stored in the memory; and outputting the digital video signal.
    • 本发明涉及一种用于在从模拟输入视频信号产生数字视频信号期间进行时基校正的方法,以及具有用于使用这种方法数字化模拟输入视频信号的装置的装置。 根据本发明,该方法包括以下步骤:接收模拟视频信号; 用视频解码器从模拟视频信号产生数字视频信号; 将数字视频信号的至少一部分存储在存储器中; 检测在数字视频信号中具有异常场排序的部分损坏数据; 或者丢弃部分损坏的数据,或者用存储在存储器中的先前数据替换损坏数据的至少一部分; 并输出数字视频信号。
    • 8. 发明申请
    • Method and apparatus for manufacturing trace performing parts with aspherical surfaces
    • 用于制造具有非球面的跟踪执行部件的方法和装置
    • US20050054265A1
    • 2005-03-10
    • US10657798
    • 2003-09-08
    • Cheng hao PiaoLi Cai
    • Cheng hao PiaoLi Cai
    • B24B13/04B24B51/00B24B49/00
    • B24B51/00B24B13/04
    • A method and apparatus for aspherical manufacturing are disclosed using trace performing. On a cone, a section whose trace corresponds to that of a required curve is defined by mathematical calculation, i.e. the parameters of the section is defined. The cone is installed to a position that provides with a trace intersection, the trace intersection couples with a grinding wheel, the cone links with the part, the part is rotated and swung about a swing axis with the cone, the trace intersection fixedly connects to the grinding wheel. Whereby the curve trace intersected on the cone is accurately transferred to the part during the performing. The present invention can be used in performing parts with convex/concave conic and high-order aspherical surfaces and has advantage in general utility, precision, efficiency and costs.
    • 公开了一种用于非球面制造的方法和装置。 在圆锥上,其曲线对应于所需曲线的截面由数学计算定义,即定义了截面的参数。 锥体安装在一个提供轨迹交叉点的位置,轨迹交叉耦合砂轮,锥体与零件连接,部件与锥体一起摆动摆动轴,轨迹连接到 砂轮。 在曲面上相交的曲线迹线在演奏过程中精确传递到零件。 本发明可用于执行具有凸/凹锥形和高阶非球面的部件,并且在一般的实用性,精度,效率和成本方面具有优点。