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公开(公告)号：US11387761B2
公开(公告)日：2022-07-12
申请号：US17103820
申请日：2020-11-24
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zoran Vrankovic , Gennadi Sizov , Gary L. Skibinski , David A. Figie , Yao Da , Todd M. Oestreich , Adam M. Shea
Abstract: A motor drive that outputs a sinusoidal waveform utilizes power switching devices operable at high switching frequencies. The switching devices may be operated, for example, between twenty kilohertz and one megahertz. A first filter is included at the output of the motor drive which has a bandwidth selected to attenuate voltage components at the output which are at the switching frequency or multiples thereof such that the output voltage waveform is generally sinusoidal. Additional filtering is included within the motor drive to establish a circulation path for common mode currents within the motor drive. Further, a shield is provided adjacent to those components within the motor drive that may experience voltage or current waveforms at the switching frequency or multiples thereof to cause radiated emissions to establish eddy currents within the EMI shield rather than passing through the shield into the environment.
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公开(公告)号：US20240275321A1
公开(公告)日：2024-08-15
申请号：US18107827
申请日：2023-02-09
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jonathan D. Hoffman , Adam M. Shea , Robert J. Miklosovic
Abstract: A motor drive receives a position feedback signal from a position sensor operatively connected to a motor. The motor drive receives a command signal defining a desired operation of the motor. A processor in the motor drive generates an acceleration feedforward signal from the command signal and an acceleration reference signal from the command signal and the position feedback signal. The processor also generates an estimated disturbance acceleration from the acceleration reference signal. The acceleration feedforward signal is multiplied by a first gain to obtain a first product, and the estimated disturbance acceleration by a second gain to obtain a second product. The first and second gains are functions of first and second portions of the system inertia. A current reference signal is generated based on the first product and second products, and an output voltage to the motor is generated from the current reference signal.
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公开(公告)号：US12191785B2
公开(公告)日：2025-01-07
申请号：US18107827
申请日：2023-02-09
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jonathan D. Hoffman , Adam M. Shea , Robert J. Miklosovic
Abstract: A motor drive receives a position feedback signal from a position sensor operatively connected to a motor. The motor drive receives a command signal defining a desired operation of the motor. A processor in the motor drive generates an acceleration feedforward signal from the command signal and an acceleration reference signal from the command signal and the position feedback signal. The processor also generates an estimated disturbance acceleration from the acceleration reference signal. The acceleration feedforward signal is multiplied by a first gain to obtain a first product, and the estimated disturbance acceleration by a second gain to obtain a second product. The first and second gains are functions of first and second portions of the system inertia. A current reference signal is generated based on the first product and second products, and an output voltage to the motor is generated from the current reference signal.
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公开(公告)号：US11539283B1
公开(公告)日：2022-12-27
申请号：US17339378
申请日：2021-06-04
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jonathan D. Hoffman , Adam M. Shea
Abstract: A power converter is configured to measure an output current and to determine a multi-phase voltage reference as a function of the output current. Within the same switching period the voltage reference is determined, a modulation routine determines a modulation index for each phase of the output voltage. In some instances, one or more phases must start modulation during the switching period before the new modulation index is determined. The modulation routine stores the value of the modulation index generated from the prior switching period and uses the stored value when a new value is not yet ready. An offset value for the phase voltage which used a modulation index from the prior switching period is determined in order to compensate the phase voltages of the other phases and to maintain a desired line-to-line voltage output from the power converter.
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公开(公告)号：US20250118935A1
公开(公告)日：2025-04-10
申请号：US18483332
申请日：2023-10-09
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zoran Vrankovic , Gary L. Skibinski , Sooraj Kv , Adam M. Shea
IPC: H01R13/6592 , H01R13/6591 , H01R13/66
Abstract: A cable for reducing electrical noise within a distributed motor drive system includes an insulating jacket defining an outer periphery of the cable. The insulating jacket extends between a first end and a second end of the cable. At least one power conductor and a ground conductor extend between the first and second ends of the cable. A communication cable also extends between the first and second ends of the cable. The communication cable includes a second jacket having an outer surface and an inner surface, where the outer surface of the second jacket defines an outer periphery of the communication cable. At least one pair of communication conductors and a braided shield extend within the communication cable. The braided shield is positioned around the communication conductors and is electrically connected to the ground conductor at the first and second ends of the cable.
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Patent Agency Ranking
公开(公告)号：US20210091697A1
公开(公告)日：2021-03-25
申请号：US17103820
申请日：2020-11-24
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Zoran Vrankovic , Gennadi Sizov , Gary L. Skibinski , David A. Figie , Yao Da , Todd M. Oestreich , Adam M. Shea
Abstract: A motor drive that outputs a sinusoidal waveform utilizes power switching devices operable at high switching frequencies. The switching devices may be operated, for example, between twenty kilohertz and one megahertz. A first filter is included at the output of the motor drive which has a bandwidth selected to attenuate voltage components at the output which are at the switching frequency or multiples thereof such that the output voltage waveform is generally sinusoidal. Additional filtering is included within the motor drive to establish a circulation path for common mode currents within the motor drive. Further, a shield is provided adjacent to those components within the motor drive that may experience voltage or current waveforms at the switching frequency or multiples thereof to cause radiated emissions to establish eddy currents within the EMI shield rather than passing through the shield into the environment.
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7.发明申请公开(公告)号：US20250088007A1
公开(公告)日：2025-03-13
申请号：US18243786
申请日：2023-09-08
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jonathan D. Hoffman , Adam M. Shea
IPC: H02J3/38 , H02J3/46 , H02M7/5387
Abstract: A system and method for reducing energy loss in a multiple inverter system provides a DC voltage to multiple inverters via a shared DC bus. Each inverter is configured to control operation of a motor operatively connected to a corresponding inverter. An amplitude of the DC voltage present on the DC bus is monitored, and each inverter selectively draws current from or delivers current to the DC bus. An amplitude of the current drawn from or delivered to the DC bus is monitored by each inverter. A level of energy delivered by at least one of the inverters to the DC bus is determined when the amplitude of the DC voltage exceeds a predefined threshold during a first operation of the multiple inverter system. At least one subsequent operation of the multiple inverter system is adapted responsive to the level of energy delivered to the DC bus.
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公开(公告)号：US11722081B1
公开(公告)日：2023-08-08
申请号：US17584006
申请日：2022-01-25
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jonathan D. Hoffman , Adam M. Shea
Abstract: A motor drive monitors operation of a motor and adaptively track disturbances experienced by the motor. The motor drive receives a command signal and a cycle position signal. An estimated disturbance observed throughout a cycle of operation is stored in a look up table, and the motor drive uses the stored values as a feedforward value into a control module. The motor drive adaptively monitors operation of the motor and generates a new estimated disturbance value throughout each subsequent cycle of operation. The values of the estimated disturbance are updated within the look up table as a function of the new estimated disturbance values and of the previously stored values. The stored disturbance values adaptively track cyclic disturbances in the controlled machine or process and to reduce the effects of these cyclic disturbances on tracking error in the controlled machine or process.
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9.发明公开公开(公告)号：US20230238905A1
公开(公告)日：2023-07-27
申请号：US17584006
申请日：2022-01-25
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jonathan D. Hoffman , Adam M. Shea
Abstract: A motor drive monitors operation of a motor and adaptively track disturbances experienced by the motor. The motor drive receives a command signal and a cycle position signal. An estimated disturbance observed throughout a cycle of operation is stored in a look up table, and the motor drive uses the stored values as a feedforward value into a control module. The motor drive adaptively monitors operation of the motor and generates a new estimated disturbance value throughout each subsequent cycle of operation. The values of the estimated disturbance are updated within the look up table as a function of the new estimated disturbance values and of the previously stored values. The stored disturbance values adaptively track cyclic disturbances in the controlled machine or process and to reduce the effects of these cyclic disturbances on tracking error in the controlled machine or process.
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10.发明申请公开(公告)号：US20220393564A1
公开(公告)日：2022-12-08
申请号：US17339378
申请日：2021-06-04
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jonathan D. Hoffman , Adam M. Shea
Abstract: A power converter is configured to measure an output current and to determine a multi-phase voltage reference as a function of the output current. Within the same switching period the voltage reference is determined, a modulation routine determines a modulation index for each phase of the output voltage. In some instances, one or more phases must start modulation during the switching period before the new modulation index is determined. The modulation routine stores the value of the modulation index generated from the prior switching period and uses the stored value when a new value is not yet ready. An offset value for the phase voltage which used a modulation index from the prior switching period is determined in order to compensate the phase voltages of the other phases and to maintain a desired line-to-line voltage output from the power converter.
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