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公开(公告)号：US11437938B2
公开(公告)日：2022-09-06
申请号：US17035889
申请日：2020-09-29
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Navid R. Zargari , Zhongyuan Cheng , Mehdi Narimani , Ahmed Hisham Abuelnaga
Abstract: A system is provided for driving multiple motors. The system includes multiple cascaded H-bridge (CHB) power inverters, a DC bus, and multiple neutral point converter/inverters. Each of the multiple CHB power inverters is connected to a respective motor at one or more AC terminals of the CHB power inverter. Each of the multiple CHB power inverters includes one or more DC terminals configured to receive DC power. Each of the multiple neutral point converter/inverters is connected to a respective CHB power inverter at one or more neutral terminals of the respective CHB power inverter and connected to the DC bus.
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公开(公告)号：US11342878B1
公开(公告)日：2022-05-24
申请号：US17227143
申请日：2021-04-09
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Ahmed Hisham Abuelnaga , Mehdi Narimani , Zhongyuan Cheng , Navid R. Zargari
Abstract: A regenerative power conversion system with a phase shift transformer having a primary circuit and N secondary sets of M secondary circuits, a controller synchronizes rectifier switching control signals of individual regenerative power stages to a phase angle of a corresponding one of the secondary circuits based on a feedback signal of the primary circuit during regenerative operation of the power conversion system.
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公开(公告)号：US10924025B2
公开(公告)日：2021-02-16
申请号：US16698392
申请日：2019-11-27
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Navid R. Zargari , Sarah Badawi , Zhong Y. Cheng , Mehdi Narimani , Ye Zhang
Abstract: For a power supply with a reduced number of semiconductor devices, a transformer receives a three-phase primary voltage and steps the three-phase primary voltage up or down to a secondary voltage with a plurality of secondary winding sets to a plurality of first phase voltages, a plurality of second phase voltages, and a plurality of third phase voltages. A plurality of power cell sets each include a plurality of power cells cascaded connected. Each power cell comprises a rectifier and an inverter. The rectifier includes two first active switches that are serially connected and receive a phase voltage at a first switch midpoint, two second active switches that are serially connected and receive another phase voltage at a second switch midpoint, and two capacitors that are serially connected and receive another phase voltage at a capacitor midpoint between the capacitors.
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公开(公告)号：US20200343821A1
公开(公告)日：2020-10-29
申请号：US16837037
申请日：2020-04-01
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Navid R. Zargari , Sarah Badawi , Zhong Y. Cheng , Mehdi Narimani , Ye Zhang
IPC: H02M5/458
Abstract: For a power supply with a reduced number of semiconductor devices, a transformer receives a three-phase primary voltage and steps the three-phase primary voltage up or down to a secondary voltage with a plurality of secondary winding sets to a plurality of first phase voltages, a plurality of second phase voltages, and a plurality of third phase voltages. A plurality of power cell sets each include a plurality of power cells cascaded connected. Each power cell comprises a rectifier and an inverter. The rectifier includes two first active switches that are serially connected and receive a phase voltage at a first switch midpoint, two second active switches that are serially connected and receive another phase voltage at a second switch midpoint, and two capacitors that are serially connected and receive another phase voltage at a capacitor midpoint between the capacitors.
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5.发明申请公开(公告)号：US20180145578A1
公开(公告)日：2018-05-24
申请号：US15876812
申请日：2018-01-22
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Navid R. Zargari , Yuan Xiao , Lixiang Wei , Zhongyuan Cheng
CPC classification number: H02M1/10 , H02M1/32 , H02M5/458 , H02M5/4585 , H02M7/49 , H02M2001/007 , H02M2001/325 , Y10T307/549 , Y10T307/658 , Y10T307/685
Abstract: Multilevel power converters, power cells and methods are presented for selectively bypassing a power stage of a multilevel inverter circuit, in which a single relay or contactor includes first and second normally closed output control contacts coupled between a given power cell switching circuit and the given power cell output, along with a normally open bypass contact coupled across the power stage output, with a local or central controller energizing the coil of the relay or contactor of a given cell to bypass that cell.
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Patent Agency Ranking
公开(公告)号：US11211879B2
公开(公告)日：2021-12-28
申请号：US16579498
申请日：2019-09-23
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Ahmed Hisham Abuelnaga , Zhituo Ni , Mehdi Narimani , Zhongyuan Cheng , Navid R. Zargari
Abstract: A power conversion system and controller configured to generate a real average DC current reference based on a DC bus voltage of a DC link circuit and a DC bus voltage setpoint, generate real and reactive ripple current references based on the DC bus voltage of the DC link circuit and a ripple angle of the DC link circuit, and generate rectifier switching control signals to operate rectifier switching devices based on the real average DC current reference and the real and reactive ripple current references.
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公开(公告)号：US20200343820A1
公开(公告)日：2020-10-29
申请号：US16698392
申请日：2019-11-27
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Navid R. Zargari , Sarah Badawi , Zhong Y. Cheng , Mehdi Narimani , Ye Zhang
IPC: H02M5/458
Abstract: For a power supply with a reduced number of semiconductor devices, a transformer receives a three-phase primary voltage and steps the three-phase primary voltage up or down to a secondary voltage with a plurality of secondary winding sets to a plurality of first phase voltages, a plurality of second phase voltages, and a plurality of third phase voltages. A plurality of power cell sets each include a plurality of power cells cascaded connected. Each power cell comprises a rectifier and an inverter. The rectifier includes two first active switches that are serially connected and receive a phase voltage at a first switch midpoint, two second active switches that are serially connected and receive another phase voltage at a second switch midpoint, and two capacitors that are serially connected and receive another phase voltage at a capacitor midpoint between the capacitors.
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公开(公告)号：US09831846B2
公开(公告)日：2017-11-28
申请号：US15132477
申请日：2016-04-19
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zhongyuan Cheng , Navid R. Zargari
Abstract: For power conversion, a power conversion system includes a plurality of power converters and a phase shifting transformer. The phase shifting transformer includes 3-phase primary windings, a core and a plurality of m secondary winding groups. Each of the secondary winding groups includes n secondary windings in electromagnetic communication with a corresponding primary winding and feeding the plurality of power converters. Phase angle sets of the secondary winding groups are all different with a non-zero secondary winding phase shift between any two secondary winding groups.
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公开(公告)号：US20170324333A1
公开(公告)日：2017-11-09
申请号：US15149384
申请日：2016-05-09
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Yuan Xiao , Zhongyuan Cheng , Lixiang Wei , Navid R. Zargari
Abstract: Disclosed examples include methods, power converters and damping circuits to control damping of an input filter circuit, in which a low-voltage secondary winding is wound around a common core with a primary winding connected between an AC input and a rectifier input of the converter, where the secondary winding is coupled in a series circuit with a damping resistor and a switch, and a controller selectively closes the switch with a controlled on-time at system power up and/or in response to detection of oscillation or transients in the power converter.
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公开(公告)号：US09787212B2
公开(公告)日：2017-10-10
申请号：US14698925
申请日：2015-04-29
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Kevin Baumann , Richard Lukaszewski , Rangarajan Tallam , Lixiang Wei , Lee Gettelfinger , Garron Morris , Bruce Weiss , Neil Gollhardt , Navid R. Zargari , William Brumsickle , Robert Wright Reese , Stephen E. Denning
CPC classification number: H02M5/458 , H02M1/08 , H02M5/4585 , H02P27/06 , Y02B70/1483
Abstract: Motor drive power conversion systems are provided including a rectifier and a switching inverter, wherein the switching devices of the rectifier, the inverter and/or of a DC/DC converter are silicon carbide switches, such as silicon carbide MOSFETs. Driver circuits are provided for providing bipolar gate drive signals to the silicon carbide MOSFETs, including providing negative gate-source voltage for controlling the off state of enhancement mode low side drivers and positive gate-source voltage for controlling the off state of enhancement mode high side drivers.
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