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公开(公告)号：US20170353138A1
公开(公告)日：2017-12-07
申请号：US15173767
申请日：2016-06-06
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Shaofeng Zhang , Haihui Lu , Yogesh P. Patel , Ahmed Mohamed Sayed Ahmed , Lixiang Wei , Richard Lukaszewski
CPC classification number: H02P27/06 , H02M1/126 , H02M1/32 , H02M1/36 , H02M5/4585 , H02M7/217 , H02M7/219 , H02M2001/0009 , Y02B70/1441
Abstract: Disclosed examples include power conversion systems, computer readable mediums and methods for mitigating input filter resonance, in which a controller operates an active front end (AFE) rectifier in a first mode to turn a single rectifier switching device on and off and measures a filter voltage or current signal while all of the rectifier switches are off. The controller determines a resonant frequency based on a transient response of the measured voltage or current signal, and selectively adjusts a rectifier control parameter to mitigate filter resonance based on the resonant frequency.
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公开(公告)号：US20170272023A1
公开(公告)日：2017-09-21
申请号：US15071374
申请日：2016-03-16
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Ahmed Mohamed Sayed Ahmed , Kanikesh Yedla , Zhenyu Ye , Prathamesh R. Vadhavkar
CPC classification number: H02P27/08 , G01R19/1658 , G01R29/18 , H02M1/126 , H02M1/32 , H02M5/4585 , H02M7/219
Abstract: System, apparatus and methods are provided for identifying a phase loss condition in a motor drive. In one example, a power conversion system includes an active rectifier, a switching inverter, and a controller. The controller is operative to generate rectifier switching control signals to operate the rectifier, measure AC input voltage signals and determine grid current signals. If the rectifier circuit is not in a switching mode, the controller identifies a suspected AC input phase loss condition if two of the AC input voltage signals are in phase with one another. If the rectifier is in the switching mode, the controller identifies a suspected AC input phase loss condition if the absolute value of the sum of two of the grid current signals is less than a predetermined non-zero threshold.
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公开(公告)号：US20220285935A1
公开(公告)日：2022-09-08
申请号：US17193854
申请日：2021-03-05
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Lei Jin , Julie Haihui Lu , Ahmed Mohamed Sayed Ahmed
IPC: H02J1/02
Abstract: For Direct Current (DC) bus voltage control, a method generates a q-axis reference current from a DC voltage error that includes a DC voltage input modified by a DC bus voltage in a closed outer loop. The method further generates a d-axis reference current from the DC voltage error, wherein the second-order harmonic in the d-axis reference current is delayed from that in q-axis reference current by 90 degrees. The method generates a q-axis current from the q-axis reference current. The method generates a d-axis current from the d-axis reference current. The second-order harmonic in d-axis current is offset from the second-order harmonic in q-axis current by 90 degrees. The method controls the DC bus voltage of a voltage control plant to mitigate a second-order harmonic in the DC bus voltage with the second-order harmonics in the q-axis current and the d-axis current.
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4.发明申请PHASE LOCK LOOP WITH CASCADE TRACKING FILTERS FOR SYNCHRONIZING AN ELECTRIC GRID 有权用于同步电网的CASCADE跟踪滤波器的相位锁定环公开(公告)号：US20150381187A1
公开(公告)日：2015-12-31
申请号：US14319469
申请日：2014-06-30
Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
Inventor： Ahmed Mohamed Sayed Ahmed , Russel J. Kerkman , Brian J. Seibel
Abstract: Present embodiments relate to a method for synchronizing an electric grid. The method includes receiving a phase voltage of the electric grid. The method further includes determining one or more disturbance frequencies in the phase voltage via a plurality of sequential tracking filters, wherein each of the plurality of tracking filters corresponds to a harmonic of the received phase voltage. The method further includes removing the disturbance frequencies components sequentially to produce a minimally distorted frequency, and performing a PLL operation on the clean frequency to determine a phase angle of the frequency.
Abstract translation: 本实施例涉及一种同步电网的方法。 该方法包括接收电网的相电压。 该方法还包括经由多个顺序跟踪滤波器来确定相电压中的一个或多个扰动频率，其中多个跟踪滤波器中的每一个对应于接收相电压的谐波。 该方法还包括顺序地去除干扰频率分量以产生最小失真的频率，以及对干净频率执行PLL操作以确定频率的相位角。
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公开(公告)号：US20200228024A1
公开(公告)日：2020-07-16
申请号：US16834719
申请日：2020-03-30
Applicant: ROCKWELL AUTOMATION TECHNOLOGIES, INC.
Inventor： Robert J. Miklosovic , Ahmed Mohamed Sayed Ahmed
Abstract: A system may include a power converter and a control system communicatively coupled to the power converter. The control system may determine a first DC voltage associated with the DC bus based on one or more DC external capacitance values that correspond to one or more loads coupled to the power converter. The control system may also determine a second DC voltage associated with the DC bus based on a capacitance of a system in which the power converter operates. The control system may also determine a third DC voltage associated with the DC bus based on the first DC voltage and the second DC voltage and adjust an operation of the power converter based on the third DC voltage.
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Patent Agency Ranking
公开(公告)号：US10263558B2
公开(公告)日：2019-04-16
申请号：US15071374
申请日：2016-03-16
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Ahmed Mohamed Sayed Ahmed , Kanikesh Yedla , Zhenyu Ye , Prathamesh R. Vadhavkar
Abstract: System, apparatus and methods are provided for identifying a phase loss condition in a motor drive. In one example, a power conversion system includes an active rectifier, a switching inverter, and a controller. The controller is operative to generate rectifier switching control signals to operate the rectifier, measure AC input voltage signals and determine grid current signals. If the rectifier circuit is not in a switching mode, the controller identifies a suspected AC input phase loss condition if two of the AC input voltage signals are in phase with one another. If the rectifier is in the switching mode, the controller identifies a suspected AC input phase loss condition if the absolute value of the sum of two of the grid current signals is less than a predetermined non-zero threshold.
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公开(公告)号：US09847733B2
公开(公告)日：2017-12-19
申请号：US15152961
申请日：2016-05-12
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Ahmed Mohamed Sayed Ahmed , Prathamesh R. Vadhavkar , Brian J. Seibel
CPC classification number: H02M5/4585 , H02M1/08 , H02M1/32 , H02M5/42 , H02M5/453 , H02M5/458 , H02M2001/325 , H02P23/0004 , H02P27/06 , H02P29/00 , H02P2201/03
Abstract: Power conversion systems and methods are provided for ride through of abnormal grid conditions or disturbances, in which a system rectifier is operated in a first mode to regulate a DC voltage of an intermediate DC circuit, an inverter is operated in the first mode to convert DC power from the intermediate DC circuit to provide AC output power to drive a load. In response to detecting an abnormal grid condition, the system changes to a second mode in which the rectifier is turned off and the inverter regulates the DC voltage of the intermediate DC circuit using power from the load.
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公开(公告)号：US11631975B2
公开(公告)日：2023-04-18
申请号：US17193854
申请日：2021-03-05
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Lei Jin , Julie Haihui Lu , Ahmed Mohamed Sayed Ahmed
IPC: H02J1/02
Abstract: For Direct Current (DC) bus voltage control, a method generates a q-axis reference current from a DC voltage error that includes a DC voltage input modified by a DC bus voltage in a closed outer loop. The method further generates a d-axis reference current from the DC voltage error, wherein the second-order harmonic in the d-axis reference current is delayed from that in q-axis reference current by 90 degrees. The method generates a q-axis current from the q-axis reference current. The method generates a d-axis current from the d-axis reference current. The second-order harmonic in d-axis current is offset from the second-order harmonic in q-axis current by 90 degrees. The method controls the DC bus voltage of a voltage control plant to mitigate a second-order harmonic in the DC bus voltage with the second-order harmonics in the q-axis current and the d-axis current.
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公开(公告)号：US11177732B1
公开(公告)日：2021-11-16
申请号：US17013175
申请日：2020-09-04
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zhendong Zhang , Rob Miklosovic , Ahmed Mohamed Sayed Ahmed
IPC: H02M1/12 , H02M7/5387 , H02M1/00
Abstract: A component includes an adaptive estimator. A converter includes a switching rectifier connected to an LCL filter with a converter inductor, a capacitor, and grid inductor connected to a voltage source through a conductor with unknown inductance. Current of the converter inductor is input to the adaptive estimator which includes an ideal LCL filter model that generates, using a simple filter, a desired dynamic behavior of the converter and LCL filter and a disturbance compensator. An LCL steady-state (“SS”) compensation models a steady-state effect of the LCL filter and conductor. Output of the adaptive estimator is subtracted from output of the LCL SS compensation to form a disturbance estimate, which is summed with a feedback loop output of the converter to form a voltage control signal that controls switching of the switching rectifier. The voltage control signal is summed with the disturbance estimate and is input to the adaptive estimator.
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公开(公告)号：US09960723B2
公开(公告)日：2018-05-01
申请号：US15173767
申请日：2016-06-06
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Shaofeng Zhang , Haihui Lu , Yogesh P. Patel , Ahmed Mohamed Sayed Ahmed , Lixiang Wei , Richard Lukaszewski
CPC classification number: H02P27/06 , H02M1/126 , H02M1/32 , H02M1/36 , H02M5/4585 , H02M7/217 , H02M7/219 , H02M2001/0009 , Y02B70/1441
Abstract: Disclosed examples include power conversion systems, computer readable mediums and methods for mitigating input filter resonance, in which a controller operates an active front end (AFE) rectifier in a first mode to turn a single rectifier switching device on and off and measures a filter voltage or current signal while all of the rectifier switches are off. The controller determines a resonant frequency based on a transient response of the measured voltage or current signal, and selectively adjusts a rectifier control parameter to mitigate filter resonance based on the resonant frequency.
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