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公开(公告)号：US09973102B1
公开(公告)日：2018-05-15
申请号：US15408757
申请日：2017-01-18
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Prathamesh R. Vadhavkar , Brian J. Seibel , Ahmed Sayed Ahmed
CPC classification number: H02M5/458 , G05B19/042 , G05B2219/41432 , H02M1/084 , H02M1/12 , H02M1/126 , H02M1/32 , H02M1/42 , H02M1/4233 , H02M5/4585 , H02M2001/0009 , H02P27/08 , H02P29/032
Abstract: A power conversion system can be implemented to reduce load disturbances on a DC bus which may be caused by load activity, such as a motor starting, stopping and/or ramping up or down. In one aspect, the power conversion system can receive externally supplied multi-phase AC electric power, such as three-phase power from a power grid, and use a converter circuit to generate the DC bus. The power conversion system can then use an inverter circuit to generate multi-phase AC electric power from the DC bus for driving the load with adjustable frequencies and/or amplitudes as desired. The power conversion system can receive feedback signals to sense the load activity and adjust the converter and/or inverter circuits accordingly to reduce the load disturbances on the DC bus.
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Patent Agency Ranking
公开(公告)号：US20170331389A1
公开(公告)日：2017-11-16
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：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：US09973103B1
公开(公告)日：2018-05-15
申请号：US15408786
申请日：2017-01-18
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Prathamesh R. Vadhavkar , Brian J. Seibel , Russel J. Kerkman
CPC classification number: H02M5/458 , G05B19/042 , G05B2219/41432 , H02M1/084 , H02M1/12 , H02M1/126 , H02M1/32 , H02M1/42 , H02M1/4233 , H02M5/4585 , H02M2001/0009 , H02P27/08 , H02P29/032
Abstract: A power conversion system can be implemented to actively control a load while compensating for reactive power which may be sourced or consumed by an input filter circuit. In one aspect, the power conversion system can receive externally supplied multi-phase AC electric power, such as three-phase power from a power grid, and use a converter circuit to generate a DC bus. The power conversion system can then use an inverter circuit to generate multi-phase AC electric power from the DC bus for driving the load with adjustable frequencies and/or amplitudes as desired. The input filter circuit can be coupled to the converter circuit to filter out harmonics resulting from switching of the converter circuit. The power conversion system can receive feedback signals which may be used to determine reactive power sourced or consumed by the filter circuit, and can adjust the converter circuit to compensate for such reactive power.
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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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