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公开(公告)号：US10184985B2
公开(公告)日：2019-01-22
申请号：US14971464
申请日：2015-12-16
摘要： A fault detection system for a wind turbine includes a doubly-fed induction generator (DFIG). The DFIG includes a wye-ring configured for at least three electrical phases. The fault detection system includes a data acquisition system including at least three sensors. Each sensor of said at least three sensors is configured to electrically couple with and measure a respective voltage of each phase of the at least three electrical phases of the wye-ring. The fault detection system further includes an alert system coupled to said data acquisition system. The alert system is configured to apply a Fourier transform to the respective measured voltages of each phase of the at least three electrical phases of the wye-ring. The alert system is further configured to provide an indication of a condition of the wye-ring based upon the transformed measured voltages.
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公开(公告)号：US10778124B2
公开(公告)日：2020-09-15
申请号：US15442068
申请日：2017-02-24
IPC分类号： H02K5/132 , H02P6/15 , G01R31/34 , H02P27/04 , H02P29/024
摘要： A method of controlling an electric motor assembly includes receiving sensor feedback that is based at least in part on electrical properties of a variable frequency power signal provided to the electric motor assembly. The method also includes adjusting the phase angle of the variable frequency power signal provided to the electric motor assembly based at least in part on the sensor feedback. The method also includes determining an operational status of the electric motor assembly that receives the variable frequency power signal based at least in part on the sensor feedback.
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公开(公告)号：US09748867B2
公开(公告)日：2017-08-29
申请号：US14816312
申请日：2015-08-03
IPC分类号： H02N1/00
CPC分类号： H02N1/004
摘要： A switched capacitive device includes a stationary portion including first circuit boards. The device also includes a translatable portion including second circuit boards proximate to, and interdigitated with, the first circuit boards. The second circuit boards are translatable with respect to the first circuit boards. The first circuit boards induce substantially linear motion of the second circuit boards through the use of an electric field induced by the first circuit boards. The device further includes a control system including switching devices and a controller coupled to the switching devices. The switching devices are coupled to at least a portion of at least one first circuit board. The switching device is configured to intermittently energize and de-energize the first circuit board for predetermined periods of time. The controller alternatingly opens and closes the switching devices through transmitted gating commands as a function of a determined load on the switched capacitive device.
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公开(公告)号：US20160322918A1
公开(公告)日：2016-11-03
申请号：US14699775
申请日：2015-04-29
摘要： A dielectric fluid includes a first liquid having first dielectric constant and conductivity values. The dielectric fluid also includes a second liquid having second dielectric constant and conductivity values. The first dielectric constant value is greater than the second dielectric constant value and the second electrical conductivity value is less than the first electrical conductivity value. The first and second liquids form an immiscible mixture that has third dielectric constant and conductivity values between the first and second dielectric constant values and the first and second electrical conductivity values, respectively. The first liquid forms a high conductivity phase representative of the first conductivity value, and the second liquid forms a low conductivity phase representative of the second conductivity value. The low conductivity phase is continuous the high conductivity phase is a plurality of droplets non-homogeneously dispersed within, and separated by, the continuous low conductivity phase.
摘要翻译： 介电流体包括具有第一介电常数和电导率值的第一液体。 电介质流体还包括具有第二介电常数和电导率值的第二液体。 第一介电常数值大于第二介电常数值，第二导电率值小于第一导电率值。 第一和第二液体分别形成第一和第二介电常数值和第一和第二电导率值之间的第三介电常数和电导率值的不混溶混合物。 第一液体形成表示第一电导率值的高导电率相位，第二液体形成代表第二电导率值的低电导率相位。 低导电相是连续的，高导电相是不均匀分散在连续低电导率相中并由连续低电导率相分隔的多个液滴。
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公开(公告)号：US20170328349A1
公开(公告)日：2017-11-16
申请号：US15152664
申请日：2016-05-12
发明人： Di Pan , Liwei Hao , Lijun He , Stefan Grubic
CPC分类号： F03D17/00 , F03D7/0224 , F03D80/70 , F05B2260/80 , Y02E10/721 , Y02E10/723
摘要： The present disclosure is directed to a system and method for detecting damage of a pitch bearing of a wind turbine. The pitch bearing is part of a pitch drive system having a plurality of pitch drive motors. The method includes measuring at least one electrical signal of the pitch drive system. The method also includes processing the electrical signal(s) of the pitch drive system and comparing the electrical signals of the pitch drive system with a baseline threshold. Thus, the method also includes determining whether damage is present in the pitch bearing based, at least in part, on the comparison, wherein the electrical signal(s) exceeding the baseline threshold is indicative of damage in the pitch bearing.
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公开(公告)号：US20170176536A1
公开(公告)日：2017-06-22
申请号：US14971464
申请日：2015-12-16
摘要： A fault detection system for a wind turbine includes a doubly-fed induction generator (DFIG). The DFIG includes a wye-ring configured for at least three electrical phases. The fault detection system includes a data acquisition system including at least three sensors. Each sensor of said at least three sensors is configured to electrically couple with and measure a respective voltage of each phase of the at least three electrical phases of the wye-ring. The fault detection system further includes an alert system coupled to said data acquisition system. The alert system is configured to apply a Fourier transform to the respective measured voltages of each phase of the at least three electrical phases of the wye-ring. The alert system is further configured to provide an indication of a condition of the wye-ring based upon the transformed measured voltages.
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公开(公告)号：US10273940B2
公开(公告)日：2019-04-30
申请号：US15152664
申请日：2016-05-12
发明人： Di Pan , Liwei Hao , Lijun He , Stefan Grubic
摘要： The present disclosure is directed to a system and method for detecting damage of a pitch bearing of a wind turbine. The pitch bearing is part of a pitch drive system having a plurality of pitch drive motors. The method includes measuring at least one electrical signal of the pitch drive system. The method also includes processing the electrical signal(s) of the pitch drive system and comparing the electrical signals of the pitch drive system with a baseline threshold. Thus, the method also includes determining whether damage is present in the pitch bearing based, at least in part, on the comparison, wherein the electrical signal(s) exceeding the baseline threshold is indicative of damage in the pitch bearing.
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公开(公告)号：US20180248500A1
公开(公告)日：2018-08-30
申请号：US15442068
申请日：2017-02-24
摘要： A method of controlling an electric motor assembly includes receiving sensor feedback that is based at least in part on electrical properties of a variable frequency power signal provided to the electric motor assembly. The method also includes adjusting the phase angle of the variable frequency power signal provided to the electric motor assembly based at least in part on the sensor feedback. The method also includes determining an operational status of the electric motor assembly that receives the variable frequency power signal based at least in part on the sensor feedback.
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公开(公告)号：US09806639B2
公开(公告)日：2017-10-31
申请号：US14699775
申请日：2015-04-29
摘要： A dielectric fluid includes a first liquid having first dielectric constant and conductivity values. The dielectric fluid also includes a second liquid having second dielectric constant and conductivity values. The first dielectric constant value is greater than the second dielectric constant value and the second electrical conductivity value is less than the first electrical conductivity value. The first and second liquids form an immiscible mixture that has third dielectric constant and conductivity values between the first and second dielectric constant values and the first and second electrical conductivity values, respectively. The first liquid forms a high conductivity phase representative of the first conductivity value, and the second liquid forms a low conductivity phase representative of the second conductivity value. The low conductivity phase is continuous the high conductivity phase is a plurality of droplets non-homogeneously dispersed within, and separated by, the continuous low conductivity phase.
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公开(公告)号：US20170040910A1
公开(公告)日：2017-02-09
申请号：US14816312
申请日：2015-08-03
IPC分类号： H02N1/00
CPC分类号： H02N1/004
摘要： A switched capacitive device includes a stationary portion including first circuit boards. The device also includes a translatable portion including second circuit boards proximate to, and interdigitated with, the first circuit boards. The second circuit boards are translatable with respect to the first circuit boards. The first circuit boards induce substantially linear motion of the second circuit boards through the use of an electric field induced by the first circuit boards. The device further includes a control system including switching devices and a controller coupled to the switching devices. The switching devices are coupled to at least a portion of at least one first circuit board. The switching device is configured to intermittently energize and de-energize the first circuit board for predetermined periods of time. The controller alternatingly opens and closes the switching devices through transmitted gating commands as a function of a determined load on the switched capacitive device.
摘要翻译： 开关电容器件包括包括第一电路板的固定部分。 该装置还包括可平移部分，其包括与第一电路板接近并互相指向的第二电路板。 第二电路板可相对于第一电路板平移。 第一电路板通过使用由第一电路板引起的电场而引起第二电路板的基本线性运动。 该装置还包括包括开关装置和耦合到开关装置的控制器的控制系统。 开关装置耦合到至少一个第一电路板的至少一部分。 开关装置被配置为间歇地给第一电路板供电和断电预定的时间段。 控制器通过传输的门控命令交替地打开和关闭开关装置，作为开关电容性装置上确定的负载的函数。
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