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公开(公告)号：US20250125705A1
公开(公告)日：2025-04-17
申请号：US18486473
申请日：2023-10-13
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jiangang Hu , Zhituo Ni
Abstract: A circuit includes a transistor configured to control pre-charging a charge storage device, and a diode coupled in parallel with the transistor. It also includes a shunt resistor coupled between the source of the transistor and a positive end of the charge storage device, an inductor coupled between the shunt resistor and the positive end of the charge storage device, and a current controller coupled to a gate of the transistor. The current controller is configured to receive a current measurement indicating an amount of current flowing through the transistor, process the current measurement to determine a switching duty cycle for the transistor, and to provide a signal to the gate of the transistor, the signal oscillating at the switching duty cycle. It also includes a power supply coupled with the source of the transistor and the drain of the transistor and configured to supply power to the current controller.
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公开(公告)号：US10217555B2
公开(公告)日：2019-02-26
申请号：US14972588
申请日：2015-12-17
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Wei Qian , Shaofeng Zhang , Haihui Lu , Lixiang Wei , Yuan Xiao , Jiangang Hu , Richard A. Lukaszewski
Abstract: For reducing volume requirements and magnetic flux leakage, a compact inductor includes a first planar core with a first core thickness along a first axis orthogonal to a plane of the first planar core. In addition, the inductor includes a second planar core disposed parallel to the first planar core with a second core thickness along the first axis. The inductor further includes a plurality of electrical windings disposed between and adjacent to an inside plane of the first planar core and an inside plane of the second planar core. The electrical windings may include insulated electrical wires. No magnetic teeth may be disposed between the first planar core and the second planar core. The first axis is parallel to a magnetic axis of each electrical winding.
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公开(公告)号：US11025052B2
公开(公告)日：2021-06-01
申请号：US15876287
申请日：2018-01-22
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Andrew J. Roberts , Yogesh P. Patel , Jiangang Hu , Lixiang Wei
IPC: H02H7/125 , H02H7/122 , H02M1/36 , H02H1/00 , H02M1/32 , H02H7/12 , H02P27/06 , H02M5/458 , H02M7/219
Abstract: Power converters, protection systems and methods to protect a precharge circuit in which a precharge resistor voltage is indirectly monitored during a normal operating mode, and a rectifier and an inverter are selectively disabled in response to the indirectly measured precharge resistor voltage indicating a fault in a precharge circuit SCR.
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公开(公告)号：US10955489B2
公开(公告)日：2021-03-23
申请号：US16601959
申请日：2019-10-15
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Rangarajan M. Tallam , Jiangang Hu , Brian P. Brown
IPC: G01R27/18 , G01R31/50 , H02M5/458 , G01R31/40 , B60L3/12 , H02H3/16 , B60L3/00 , B60L3/04 , H02H7/12
Abstract: Power conversion systems, disclosed examples include power conversion systems, ground fault detection apparatus and methods to detect and identify ground faults in a power conversion system using AC coupling to sense a system voltage to determine a leakage flux linkage, and to identify a faulted converter phase based on a phase shift angle of the leakage flux linkage.
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公开(公告)号：US20200041559A1
公开(公告)日：2020-02-06
申请号：US16601959
申请日：2019-10-15
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Rangarajan M. Tallam , Jiangang Hu , Brian P. Brown
Abstract: Power conversion systems, disclosed examples include power conversion systems, ground fault detection apparatus and methods to detect and identify ground faults in a power conversion system using AC coupling to sense a system voltage to determine a leakage flux linkage, and to identify a faulted converter phase based on a phase shift angle of the leakage flux linkage.
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Patent Agency Ranking
公开(公告)号：US20190229521A1
公开(公告)日：2019-07-25
申请号：US15876287
申请日：2018-01-22
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Andrew J. Roberts , Yogesh P. Patel , Jiangang Hu , Lixiang Wei
Abstract: Power converters, protection systems and methods to protect a precharge circuit in which a precharge resistor voltage is indirectly monitored during a normal operating mode, and a rectifier and an inverter are selectively disabled in response to the indirectly measured precharge resistor voltage indicating a fault in a precharge circuit SCR.
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公开(公告)号：US20180183348A1
公开(公告)日：2018-06-28
申请号：US15389670
申请日：2016-12-23
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jiangang Hu , Lixiang Wei , James A. Ulrich
CPC classification number: H02M5/42 , H02M1/32 , H02M2001/322
Abstract: Power conversion systems, discharge circuits and methods are disclosed for discharging a DC bus conditioner capacitor connected between a neutral node and a first reference node in a DC bus circuit of a power conversion system, in which a DC bus voltage of the power conversion system is monitored, and a discharge control DC power supply is activated in response to the DC bus voltage transitioning below a first threshold voltage to activate a switching circuit to connect a discharge resistor between the first reference node and a DC bus terminal of the DC bus circuit to at least partially discharge the conditioner capacitor through the discharge resistor.
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公开(公告)号：US20210325478A1
公开(公告)日：2021-10-21
申请号：US16849230
申请日：2020-04-15
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jiangang Hu , Brian P. Brown , Lixiang Wei , Andrew J. Roberts
IPC: G01R31/52 , G01R31/327 , G01R31/42
Abstract: A power conversion system includes a sensing circuit to sense a system voltage of a DC bus circuit with a first DC bus terminal with a first voltage positive relative to a second voltage of a second DC bus terminal. The sensing circuit includes a first capacitor having a first terminal coupled to the second DC bus terminal, and a second terminal; a second capacitor having a first terminal coupled to the second terminal of the first capacitor, and a second terminal coupled to a reference node; and a resistive divider circuit coupled across the first capacitor and having an output terminal that delivers a voltage signal corresponding to a voltage across the first capacitor.
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公开(公告)号：US20190204374A1
公开(公告)日：2019-07-04
申请号：US15861886
申请日：2018-01-04
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Lixiang Wei , Jiangang Hu , Jeffrey D. McGuire
Abstract: A method and controller to automatically determine a grounding condition of a motor drive, in which an inverter is operated at a predetermined frequency while a load resistor is connected between a single phase of a motor drive inverter output and a reference node, a leakage flux linkage value is computed according to a neutral-ground voltage of the motor drive, and a processor determines whether the motor drive is solid grounded, high-resistance grounded, or floating according to the leakage flux linkage value. In certain examples, the processor automatically turns the inverter off while the load resistor is connected between the single phase of the inverter output and the reference node, and automatically determines whether the motor drive is delta corner grounded according to the neutral-ground voltage.
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公开(公告)号：US10008952B1
公开(公告)日：2018-06-26
申请号：US15389670
申请日：2016-12-23
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jiangang Hu , Lixiang Wei , James A. Ulrich
Abstract: Power conversion systems, discharge circuits and methods are disclosed for discharging a DC bus conditioner capacitor connected between a neutral node and a first reference node in a DC bus circuit of a power conversion system, in which a DC bus voltage of the power conversion system is monitored, and a discharge control DC power supply is activated in response to the DC bus voltage transitioning below a first threshold voltage to activate a switching circuit to connect a discharge resistor between the first reference node and a DC bus terminal of the DC bus circuit to at least partially discharge the conditioner capacitor through the discharge resistor.
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