Patents by Inventor Yao Da
Yao Da has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230330134Abstract: The present invention relates to methods and compositions for preventing or reducing the likelihood of Coronavirus (CoV) and/or Respiratory syncytial virus (RSV) infection in an individual, preventing or reducing the likelihood or severity of a symptom associated with a CoV and/or RSV infection in an individual, reducing the severity and/or duration of a CoV and/or RSV infection in an individual, or treating a CoV and/or RSV infection in an individual, preventing or reducing viral shedding in an individual infected with a CoV and/or RSV infection, or reducing transmission of a CoV and/or RSV in a population comprising administering to the individual an effective amount of a macromolecule wherein the macromolecule comprises a dendrimer of 3-5 generations with one or more sulfonic acid or sulfonate containing moieties attached to one or more surface groups. The present invention also relates to a device for delivering a composition comprising such a macromolecule.Type: ApplicationFiled: April 14, 2021Publication date: October 19, 2023Inventors: Jessica Huberman, Graham Heery, Jacinth Fairley, Jeremy Robert Arthur Paull, Yao Da Dong
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Patent number: 11387761Abstract: 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.Type: GrantFiled: November 24, 2020Date of Patent: July 12, 2022Assignee: Rockwell Automation Technologies, Inc.Inventors: Zoran Vrankovic, Gennadi Sizov, Gary L. Skibinski, David A. Figie, Yao Da, Todd M. Oestreich, Adam M. Shea
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Publication number: 20210091697Abstract: 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.Type: ApplicationFiled: November 24, 2020Publication date: March 25, 2021Inventors: Zoran Vrankovic, Gennadi Sizov, Gary L. Skibinski, David A. Figie, Yao Da, Todd M. Oestreich, Adam M. Shea
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Patent number: 10908590Abstract: A motor controller coupled to a motor is provided. The motor controller includes a processor, a memory coupled to the processor, a first input coupled to the processor, wherein the first input is associated with a first mode of operation, and a second input coupled to the processor, wherein the second input is associated with a calibration mode. The motor controller is configured to receive, through the first input, a first activation signal, operate the motor in the first mode of operation in response to receiving the first activation signal, while operating the motor in the first mode of operation, receive, through the second input, a second activation signal, in response to receiving the first activation signal and the second activation signal, adjust a value of a parameter associated with the first mode of operation, and store the value of the parameter in the memory.Type: GrantFiled: July 18, 2014Date of Patent: February 2, 2021Assignee: REGAL BELOIT AMERICA, INC.Inventors: Roger Carlos Becerra, Brian Lee Beifus, Ludovic Andre Chretien, Yao Da, Glen Chester Young
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Patent number: 10879826Abstract: 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.Type: GrantFiled: September 24, 2019Date of Patent: December 29, 2020Assignee: Rockwell Automation Technologies, Inc.Inventors: Zoran Vrankovic, Gennadi Sizov, Gary L. Skibinski, David A. Figie, Yao Da, Todd M. Oestreich, Adam M. Shea
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Patent number: 10236805Abstract: Methods and systems for controlling an electric motor are provided. An electric motor controller is configured to be coupled to an electric motor. The controller includes a rectifier, an inverter coupled to the rectifier, and a control unit coupled to the inverter. The rectifier is configured to rectify an alternating current (AC) input voltage to produce a pulsed direct current (DC) voltage that drops to approximately zero during each cycle when the AC input voltage transits zero. Energy is stored on a load coupled to the motor when AC input voltage is available. The inverter is configured to receive the DC voltage and to provide a conditioned output voltage to the motor. The control unit is configured to manage energy transfer between the motor and the load such that the motor generates positive torque when the DC voltage supplied to the inverter has approximately 100% voltage ripple.Type: GrantFiled: February 16, 2015Date of Patent: March 19, 2019Assignee: Regal Beloit America, Inc.Inventors: Roger Carlos Becerra, Ludovic Andre Chretien, Glen C. Young, David Allen Clendenen, Yao Da
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Patent number: 9806626Abstract: An electric motor controller and methods of determining which input power line of a plurality of input power lines of a motor drive controller has been energized are provided. An electric motor controller configured to be coupled to an electric motor includes a plurality of power input lines configured to receive an alternating current (AC) input voltage from an AC power source, an energized line detection device configured to sense that a power input line has been energized by the AC power source, and configured to output an isolated signal, and a rectifier configured to convert the AC input voltage having a frequency to a direct current (DC) voltage. The controller also includes a computing device coupled downstream from the energized line detection device and configured to determine which input power line has been energized.Type: GrantFiled: May 6, 2014Date of Patent: October 31, 2017Assignee: Regal Beloit America, Inc.Inventors: Roger Carlos Becerra, Ludovic Andre Chretien, Yao Da, Peizhong Yi, Lester Benjamin Manz
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Patent number: 9735725Abstract: Protection of an electric motor drive controller from a transient voltage is described herein. The transient voltage is provided by an alternating current (AC) power line that includes a line conductor, a neutral conductor, and a ground conductor. The transient voltage protection system includes a first stage protection device coupled to an input of a rectifier of the motor drive controller. The first stage protection device is configured to suppress the transient voltage to prevent damage to the motor drive controller. The transient voltage protection system also includes a second stage protection device coupled between the rectifier and an inverter of the motor drive controller. The second stage protection device is configured to further suppress the transient voltage to prevent damage to the inverter.Type: GrantFiled: January 21, 2014Date of Patent: August 15, 2017Assignee: Regal Beloit America, Inc.Inventors: David Allen Clendenen, Yao Da, Ludovic Andre Chretien, Ming Li, Steven P. Richardville, Roger Carlos Becerra, Glen Chester Young
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Patent number: 9331614Abstract: A motor controller is provided that includes an inverter configured to drive an electric motor, a rectifier configured to rectify an alternating current (AC) input current and to output the rectified AC input current to the inverter, and a controller coupled to the inverter. The controller is configured to improve a power factor of the motor controller by controlling the AC input current based on a direct current (DC) link voltage measurement.Type: GrantFiled: February 8, 2013Date of Patent: May 3, 2016Assignee: Regal Beloit America, Inc.Inventors: Roger Carlos Becerra, Yao Da, Ludovic Andre Chretien, Peizhong Yi
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Patent number: 9300241Abstract: A drive circuit is provided for reducing conducted electromagnetic interference provided by a power line to a motor controller. The drive circuit includes an EMI filter having first and second EMI filter input terminals, and first and second EMI filter output terminals. The first input terminal is configured to be coupled to a first AC line output and the second input terminal is configured to be coupled to a second AC line output. The drive circuit includes a rectifier portion having first and rectifier input terminals coupled to the first and second EMI output terminals, respectively. The drive circuit includes at least two series-coupled filter capacitors after the rectifier portion and a PFC choke coupled at a first end to one of the EMI filter output terminals and to one of the first and second rectifier input terminals, and at a second end between the series-coupled filter capacitors.Type: GrantFiled: December 3, 2014Date of Patent: March 29, 2016Assignee: Regal Beloit America, Inc.Inventors: Roger Carlos Becerra, Yao Da
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Publication number: 20160020715Abstract: A motor controller coupled to a motor is provided. The motor controller includes a processor, a memory coupled to the processor, a first input coupled to the processor, wherein the first input is associated with a first mode of operation, and a second input coupled to the processor, wherein the second input is associated with a calibration mode. The motor controller is configured to receive, through the first input, a first activation signal, operate the motor in the first mode of operation in response to receiving the first activation signal, while operating the motor in the first mode of operation, receive, through the second input, a second activation signal, in response to receiving the first activation signal and the second activation signal, adjust a value of a parameter associated with the first mode of operation, and store the value of the parameter in the memory.Type: ApplicationFiled: July 18, 2014Publication date: January 21, 2016Inventors: Roger Carlos Becerra, Brian Lee Beifus, Ludovic Andre Chretien, Yao Da, Glen Chester Young
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Publication number: 20150326152Abstract: An electric motor controller and methods of determining which input power line of a plurality of input power lines of a motor drive controller has been energized are provided. An electric motor controller configured to be coupled to an electric motor includes a plurality of power input lines configured to receive an alternating current (AC) input voltage from an AC power source, an energized line detection device configured to sense that a power input line has been energized by the AC power source, and configured to output an isolated signal, and a rectifier configured to convert the AC input voltage having a frequency to a direct current (DC) voltage. The controller also includes a computing device coupled downstream from the energized line detection device and configured to determine which input power line has been energized.Type: ApplicationFiled: May 6, 2014Publication date: November 12, 2015Applicant: Regal Beloit America, Inc.Inventors: ROGER CARLOS BECERRA, Ludovic Andre Chretien, Yao Da, Peizhong Yi, Lester Benjamin Manz
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Publication number: 20150207449Abstract: Protection of an electric motor drive controller from a transient voltage is described herein. The transient voltage is provided by an alternating current (AC) power line that includes a line conductor, a neutral conductor, and a ground conductor. The transient voltage protection system includes a first stage protection device coupled to an input of a rectifier of the motor drive controller. The first stage protection device is configured to suppress the transient voltage to prevent damage to the motor drive controller. The transient voltage protection system also includes a second stage protection device coupled between the rectifier and an inverter of the motor drive controller. The second stage protection device is configured to further suppress the transient voltage to prevent damage to the inverter.Type: ApplicationFiled: January 21, 2014Publication date: July 23, 2015Applicant: Regal Beloit America, Inc.Inventors: David Allen Clendenen, Yao Da, Ludovic Andre Chretien, Ming Li, Steven P. Richardville, Roger Carlos Becerra, Glen Chester Young
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Publication number: 20150162859Abstract: Methods and systems for controlling an electric motor are provided. An electric motor controller is configured to be coupled to an electric motor. The controller includes a rectifier, an inverter coupled to the rectifier, and a control unit coupled to the inverter. The rectifier is configured to rectify an alternating current (AC) input voltage to produce a pulsed direct current (DC) voltage that drops to approximately zero during each cycle when the AC input voltage transits zero. Energy is stored on a load coupled to the motor when AC input voltage is available. The inverter is configured to receive the DC voltage and to provide a conditioned output voltage to the motor. The control unit is configured to manage energy transfer between the motor and the load such that the motor generates positive torque when the DC voltage supplied to the inverter has approximately 100% voltage ripple.Type: ApplicationFiled: February 16, 2015Publication date: June 11, 2015Inventors: ROGER CARLOS BECERRA, Ludovic Andre Chretien, Glen C. Young, David Allen Clendenen, Yao Da
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Publication number: 20150084562Abstract: A drive circuit is provided for reducing conducted electromagnetic interference provided by a power line to a motor controller. The drive circuit includes an EMI filter having first and second EMI filter input terminals, and first and second EMI filter output terminals. The first input terminal is configured to be coupled to a first AC line output and the second input terminal is configured to be coupled to a second AC line output. The drive circuit includes a rectifier portion having first and rectifier input terminals coupled to the first and second EMI output terminals, respectively. The drive circuit includes at least two series-coupled filter capacitors after the rectifier portion and a PFC choke coupled at a first end to one of the EMI filter output terminals and to one of the first and second rectifier input terminals, and at a second end between the series-coupled filter capacitors.Type: ApplicationFiled: December 3, 2014Publication date: March 26, 2015Inventors: ROGER CARLOS BECERRA, YAO DA
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Patent number: 8981686Abstract: An electric motor controller is configured to be coupled to an electric motor. The controller includes an inverter and a control unit coupled to the inverter. The inverter is configured to receive an input voltage and to provide a conditioned output voltage to the electric motor. The control unit is configured to control the electric motor to produce positive torque when direct current (DC) link voltage has a 100% voltage ripple. Methods for controlling an electric motor using the electric motor controller are also provided.Type: GrantFiled: January 24, 2013Date of Patent: March 17, 2015Assignee: Regal Beloit America, Inc.Inventors: Roger Carlos Becerra, Ludovic Andre Chretien, Glen C. Young, David Allen Clendenen, Yao Da
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Patent number: 8963478Abstract: Protection of a motor controller from a transient voltage and/or an over-voltage condition is described. A drive circuit includes a rectifier portion and at least one inductive device coupled to the rectifier portion. The drive circuit further includes at least one voltage clamping device coupled in parallel with the at least one inductive device, and at least one switching device configured to open as a function of a direct current (DC) link voltage value.Type: GrantFiled: October 25, 2012Date of Patent: February 24, 2015Assignee: Regal Beloit America, Inc.Inventors: Roger Carlos Becerra, Yao Da, David Allen Clendenen
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Patent number: 8917042Abstract: A drive circuit is provided for reducing conducted electromagnetic interference provided by a power line to a motor controller. The power line includes a first alternating current (AC) line output and a second AC line output. The drive circuit includes an EMI filter having a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input terminal is configured to be coupled to the first AC line output and the second input terminal is configured to be coupled to the second AC line output. The drive circuit further includes at least two series-coupled filter capacitors positioned after the EMI filter and a power factor correction (PFC) choke. The PFC choke is coupled at a first end to the second output terminal and at a second end between the series-coupled filter capacitors.Type: GrantFiled: September 11, 2012Date of Patent: December 23, 2014Assignee: Regal Beloit America, Inc.Inventors: Roger Carlos Becerra, Yao Da
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Publication number: 20140225545Abstract: A motor controller is provided that includes an inverter configured to drive an electric motor, a rectifier configured to rectify an alternating current (AC) input current and to output the rectified AC input current to the inverter, and a controller coupled to the inverter. The controller is configured to improve a power factor of the motor controller by controlling the AC input current based on a direct current (DC) link voltage measurement.Type: ApplicationFiled: February 8, 2013Publication date: August 14, 2014Applicant: Regal Beloit America, Inc.Inventors: Roger Carlos Becerra, Yao Da, Ludovic Andre Chretien, Peizhong Yi
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Publication number: 20140203755Abstract: An electric motor controller is configured to be coupled to an electric motor. The controller includes an inverter and a control unit coupled to the inverter. The inverter is configured to receive an input voltage and to provide a conditioned output voltage to the electric motor. The control unit is configured to control the electric motor to produce positive torque when direct current (DC) link voltage has a 100% voltage ripple. Methods for controlling an electric motor using the electric motor controller are also provided.Type: ApplicationFiled: January 24, 2013Publication date: July 24, 2014Applicant: Regal Beloit America, Inc.Inventors: ROGER CARLOS BECERRA, Ludovic Andre Chretien, Glen C. Young, David Allen Clendenen, Yao Da