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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：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：US09812990B1
公开(公告)日：2017-11-07
申请号：US15296472
申请日：2016-10-18
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zhongyuan Cheng , Navid Reza Zargari
IPC: H02M7/538 , H02M7/5387 , H02P27/08
CPC classification number: H02P27/14 , H02M7/483 , H02M7/49 , H02M2001/325
Abstract: Apparatus to provide bypass redundancy for a multiphase multilevel inverter including a spare inverter stage and a switch circuit to connect the spare inverter stage between a selected one of the inverter phase first nodes having a bypassed stage and a common connection node, and to connect the remaining inverter phase first nodes with the common connection node.
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5.发明申请CASCADED H-BRIDGE (CHB) INVERTER LEVEL SHIFT PWM WITH ROTATION 有权具有旋转的CASCADED H-BRIDGE（CHB）INVERTER LEVEL SHIFT PWM公开(公告)号：US20150180369A1
公开(公告)日：2015-06-25
申请号：US14636299
申请日：2015-03-03
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Thomas Nondahl , Jingbo Liu , Zhongyuan Cheng , Navid Zargari
IPC: H02M7/5387
CPC classification number: H02M7/53871 , H02M1/12 , H02M7/49 , H02M7/5395 , H02M2007/4835
Abstract: Cascade H-Bridge inverters and carrier-based level shift pulse width modulation techniques are presented for generating inverter stage switching control signals, in which carrier waveform levels are selectively shifted to control THD and to mitigate power distribution imbalances within multilevel inverter elements using either complementary carrier or complementary reference modulation techniques.
Abstract translation: 提出了级联H桥逆变器和基于载波的电平移位脉冲宽度调制技术，用于产生逆变器级切换控制信号，其中载波波形电平被选择性地移位以控制THD并且使用互补载波来减轻多电平逆变器元件内的功率分配不平衡 或互补参考调制技术。
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Patent Agency Ranking
公开(公告)号：US20240402260A1
公开(公告)日：2024-12-05
申请号：US18201580
申请日：2023-05-24
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zhongyuan Cheng , Navid Zargari , Yuan Xiao
Abstract: A component includes a power suspension module that suspends providing power from a DC source to a DC link capacitor and from the capacitor to a load. A bleeding resistor is connected in parallel with the capacitor and an auxiliary power supply draws power from the capacitor. The component includes a measurement module that measures a first, second and third capacitor voltage at a first, second, time, and third time in response suspending power between the DC source and the load. The component includes a capacitance module that uses bleeding resistor resistance, the voltages and the times to determine a current capacitance of the capacitor, a capacitance comparison module that compares the current capacitance with an initial capacitance of the capacitor, and an alert module that sends an alert in response to determining that a difference between the current capacitance and the initial capacitance is above a capacitance degradation threshold.
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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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9.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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公开(公告)号：US09748862B2
公开(公告)日：2017-08-29
申请号：US14710690
申请日：2015-05-13
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zhongyuan Cheng , Navid Zargari
CPC classification number: H02M7/487 , H02M3/1584 , H02M7/538 , H02M2001/007
Abstract: Power converters are presented with one or more sparse multilevel actively clamped (SMAC) power converter stages, where the individual stages include an integer number N capacitors or DC voltage sources coupled between stage DC inputs to provide L=N+1 converter stage DC voltage nodes, with a switching circuit having no more than L*(L−1) switching devices and no flying or floating DC storage capacitors, where N is greater than 2.
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