Patents by Inventor Jadav Das
Jadav Das 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: 20240094718Abstract: A non-transitory computer-readable medium includes instructions that, when executed by processing circuitry, are configured to cause the processing circuitry to receive a first dataset associated with a mover system having a track and a plurality of mover assemblies independently movable along the track, identify a subset of the first dataset associated with a normal operating state of the mover system based on state data associated with the mover system, receive a second dataset associated with the mover system after receiving the first dataset and having a first set of differences from the subset of the first dataset, determine whether the second dataset is indicative of an anomaly state of the mover system based on a relationship between an anomaly signature dataset and the second dataset, and adjusting operation of the mover system in response to determining that the second dataset corresponds to the anomaly signature dataset.Type: ApplicationFiled: September 19, 2022Publication date: March 21, 2024Inventors: Bijan SayyarRodsari, Jakob Methfessel, Shankha S. Seal, Jadav Das
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Patent number: 11787649Abstract: A system and method of determining orientation of a physical location on a cart or end effector located on the cart in an independent cart system receives a feedback signal from a sensor on the cart. A multi-axis device may generate three or more signals corresponding to X, Y, and Z axes orientations. Processing may be performed on the signals to generate a value of yaw, pitch, or roll of the cart. The feedback or processed signals are transmitted from the mover to a remote device external from the track. The real-time orientation information may be used to implement closed-loop control of an actuator mounted on or external to each cart as the cart travels along the track. Power for the devices on the mover may be provided by a battery mounted on the cart or by a wireless power transfer system.Type: GrantFiled: April 7, 2021Date of Patent: October 17, 2023Assignee: Rockwell Automation Technologies, Inc.Inventors: Shankha S. Seal, Jadav Das, Tracy M. Clark, Michaela R. Kaufmann, Dayin Xu, Xikai Sun, John Floresta
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Patent number: 11767174Abstract: A contactless monitoring system detects operating performance of movers in an independent cart system. A contactless sensor is provided on an actuator to automatically track a mover as it travels along the track. The sensor includes a transmitter configured to transmit a signal and a receiver configured to receive the signal after it is reflected off the mover. The actuator may be configured to mover the sensor in a single axis or in multiple axes of motion. As a mover travels along the track, the sensor transmits a signal towards the mover and detects the signal after it has been reflected off the mover. A controller may synchronize motion of the actuator with motion of the mover, such that the sensor may continually transmit the signal off the mover for at least a portion of the travel by the mover along the track.Type: GrantFiled: June 23, 2021Date of Patent: September 26, 2023Assignee: Rockwell Automation Technologies, Inc.Inventors: Jadav Das, Robert H. Schmidt, Yuhong Huang
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Method and apparatus for commutation of drive coils in a linear drive system with independent movers
Patent number: 11641169Abstract: A motor controller is provided that executes a commutation routine in one of a plurality of operating modes to regulate current provided to drive coils in a linear motion system. The motor controller generated currents for each of the drive coils in a first operating mode to minimize the copper losses in the drive coils, in a second operating mode to maximize the force applied to the mover, in a third operating mode to provide balanced currents between the drive coils, and in a fourth operating mode to provide currents according to a selected operating point that combines characteristics of the first three operating points. The motor controller may also monitor each of the drive coils for saturation and redistribute at least a portion of the current required to control operation of the mover to the other drive coils when one of the drive coils is saturated.Type: GrantFiled: February 24, 2021Date of Patent: May 2, 2023Assignee: Rockwell Automation Technologies, Inc.Inventor: Jadav Das -
Patent number: 11581838Abstract: A system for wirelessly transmitting power between a track and independent movers in a motion control system includes a pick-up coil provided proximate to the magnets on the movers. The fundamental component of the voltage applied to the drive coils interacts primarily with the magnetic field generated by the permanent magnets on the movers and not with the pick-up coil. Consequently, the pick-up coil does not interfere with desired operation of the movers but rather, interacts primarily with the harmonic components and has current and voltages induced within the pick-up coil as a result of the harmonic components. The energy captured by the pick-up coil reduces the amplitude of eddy currents on the mover. After harvesting the harmonic content, the pick-up coil may be connected to another circuit on the mover and serve as a supply voltage for the other circuit.Type: GrantFiled: April 13, 2021Date of Patent: February 14, 2023Assignee: Rockwell Automation Technologies, Inc.Inventors: Xikai Sun, Jadav Das, Tracy M. Clark, Robert H. Schmidt, Neil R. Bentley
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Publication number: 20220411196Abstract: A contactless monitoring system detects operating performance of movers in an independent cart system. A contactless sensor is provided on an actuator to automatically track a mover as it travels along the track. The sensor includes a transmitter configured to transmit a signal and a receiver configured to receive the signal after it is reflected off the mover. The actuator may be configured to mover the sensor in a single axis or in multiple axes of motion. As a mover travels along the track, the sensor transmits a signal towards the mover and detects the signal after it has been reflected off the mover. A controller may synchronize motion of the actuator with motion of the mover, such that the sensor may continually transmit the signal off the mover for at least a portion of the travel by the mover along the track.Type: ApplicationFiled: June 23, 2021Publication date: December 29, 2022Inventors: Jadav Das, Robert H. Schmidt, Yuhong Huang
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Patent number: 11539244Abstract: An independent cart system includes an inductive link for contactless power transfer between a track and each mover as the mover travels along the track. A system for contactless data transmission between movers and a controller in the independent cart system includes a transmitter and/or receiver mounted on each mover and a complementary receiver and/or transmitter mounted on a track. The transmitter receives data to be transmitted across the inductive link and modulates a voltage present on either the primary or secondary winding to which it is coupled. The modulated voltage present on one winding induces a corresponding modulation on the voltage present on the other winding. A receiver operatively connected to the other side of the inductive link detects the modulated voltage and decodes the data from the modulated voltage received across the inductive link.Type: GrantFiled: August 19, 2021Date of Patent: December 27, 2022Assignee: Rockwell Automation Technologies, Inc.Inventors: Jadav Das, Xikai Sun, Shankha S. Seal, Dayin Xu, Tracy M. Clark, John Floresta
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Publication number: 20220324663Abstract: A system and method of determining orientation of a physical location on a cart or end effector located on the cart in an independent cart. system receives a feedback signal from a sensor on the cart, A multi-axis device may generate three or more signals corresponding to X, Y, and Z axes orientations. Processing may be performed on the signals to generate a value of yaw, pitch, or roll of the cart. The feedback or processed signals are transmitted from the mover to a remote device external from the track. The real-time orientation information may be used to implement closed-loop control of an actuator mounted on or external to each cart as the cart travels along the track, Power for the devices on the mover may be provided by a battery mounted on the cart or by a wireless power transfer system.Type: ApplicationFiled: April 7, 2021Publication date: October 13, 2022Inventors: Shankha S. Seal, Jadav Das, Tracy M. Clark, Michaela R. Kaufmann, Dayin Xu, Xikai Sun, John Floresta
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Publication number: 20210384765Abstract: An independent cart system includes an inductive link for contactless power transfer between a track and each mover as the mover travels along the track. A system for contactless data transmission between movers and a controller in the independent cart system includes a transmitter and/or receiver mounted on each mover and a complementary receiver and/or transmitter mounted on a track. The transmitter receives data to be transmitted across the inductive link and modulates a voltage present on either the primary or secondary winding to which it is coupled. The modulated voltage present on one winding induces a corresponding modulation on the voltage present on the other winding. A receiver operatively connected to the other side of the inductive link detects the modulated voltage and decodes the data from the modulated voltage received across the inductive link.Type: ApplicationFiled: August 19, 2021Publication date: December 9, 2021Inventors: Jadav Das, Xikai Sun, Shankha S. Seal, Dayin Xu, Tracy M. Clark, John Floresta
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Patent number: 11181393Abstract: By configuring an encoder scale as a varying scale with successively increasing or decreasing pitch, sensors in a travel path of the scale can detect a phase difference to determine an absolute position of the scale for use in an industrial control system. Due to the successively increasing or decreasing pitch, each sensor can detect successively increasing or decreasing properties (such as magnetic fields) from the scale in a uniquely identifiable pattern. By taking the difference between readings of adjacent sensors, each sensor detecting properties of the scale, an absolute position of the scale between the sensors can be determined. The principle for feedback for the encoder system is analogous to a Nonius or Vernier principle to determine absolute position.Type: GrantFiled: April 14, 2020Date of Patent: November 23, 2021Assignee: Rockwell Automation Technologies, Inc.Inventors: Peter M. Smit, Xikai Sun, Jadav Das
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Publication number: 20210234488Abstract: A system for wirelessly transmitting power between a track and independent movers in a motion control system includes a pick-up coil provided proximate to the magnets on the movers. The fundamental component of the voltage applied to the drive coils interacts primarily with the magnetic field generated by the permanent magnets on the movers and not with the pick-up coil. Consequently, the pick-up coil does not interfere with desired operation of the movers but rather, interacts primarily with the harmonic components and has current and voltages induced within the pick-up coil as a result of the harmonic components. The energy captured by the pick-up coil reduces the amplitude of eddy currents on the mover. After harvesting the harmonic content, the pick-up coil may be connected to another circuit on the mover and serve as a supply voltage for the other circuit.Type: ApplicationFiled: April 13, 2021Publication date: July 29, 2021Inventors: Xikai Sun, Jadav Das, Tracy M. Clark, Robert H. Schmidt, Neil R. Bentley
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Patent number: 11070153Abstract: A mover is configured to be electromagnetically propelled along a track in a linear motor track system with a force that is calculated to include compensation for gravity. A multi-axis accelerometer arranged in each segment of the track can detect an orientation or angle of the track segment for determining gravity with respect to the particular section. As a result, if the track is at an incline, such as a ramp, a desired force for moving a mover along the track can be compensated to include gravity due to the incline for achieving a desired motion result. In addition, the detected orientation of the track can be compared to an expected orientation stored by a control program to avoid a loss of performance due to physical changes in the track not matching an expected/programmed configuration of the track.Type: GrantFiled: February 12, 2020Date of Patent: July 20, 2021Assignee: Rockwell Automation Technologies, Inc.Inventors: David D. Van Dorpe, Mark R. Cooper, Shankernarayan Ramanarayanan, Patrick E. Ozimek, Jadav Das
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Method and Apparatus for Commutation of Drive Coils in a Linear Drive System with Independent Movers
Publication number: 20210184605Abstract: A motor controller is provided that executes a commutation routine in one of a plurality of operating modes to regulate current provided to drive coils in a linear motion system. The motor controller generated currents for each of the drive coils in a first operating mode to minimize the copper losses in the drive coils, in a second operating mode to maximize the force applied to the mover, in a third operating mode to provide balanced currents between the drive coils, and in a fourth operating mode to provide currents according to a selected operating point that combines characteristics of the first three operating points. The motor controller may also monitor each of the drive coils for saturation and redistribute at least a portion of the current required to control operation of the mover to the other drive coils when one of the drive coils is saturated.Type: ApplicationFiled: February 24, 2021Publication date: June 17, 2021Inventor: Jadav Das -
Patent number: 10985685Abstract: A system for wirelessly transmitting power between a track and independent movers in a motion control system includes a pick-up coil provided proximate to the magnets on the movers. The fundamental component of the voltage applied to the drive coils interacts primarily with the magnetic field generated by the permanent magnets on the movers and not with the pick-up coil. Consequently, the pick-up coil does not interfere with desired operation of the movers but rather, interacts primarily with the harmonic components and has current and voltages induced within the pick-up coil as a result of the harmonic components. The energy captured by the pick-up coil reduces the amplitude of eddy currents on the mover. After harvesting the harmonic content, the pick-up coil may be connected to another circuit on the mover and serve as a supply voltage for the other circuit.Type: GrantFiled: September 30, 2019Date of Patent: April 20, 2021Assignee: Rockwell Automation Technologies, Inc.Inventors: Xikai Sun, Jadav Das, Tracy M. Clark, Robert H. Schmidt, Neil R. Bentley
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Publication number: 20210099119Abstract: A system for wirelessly transmitting power between a track and independent movers in a motion control system includes a pick-up coil provided proximate to the magnets on the movers. The fundamental component of the voltage applied to the drive coils interacts primarily with the magnetic field generated by the permanent magnets on the movers and not with the pick-up coil. Consequently, the pick-up coil does not interfere with desired operation of the movers but rather, interacts primarily with the harmonic components and has current and voltages induced within the pick-up coil as a result of the harmonic components. The energy captured by the pick-up coil reduces the amplitude of eddy currents on the mover. After harvesting the harmonic content, the pick-up coil may be connected to another circuit on the mover and serve as a supply voltage for the other circuit.Type: ApplicationFiled: September 30, 2019Publication date: April 1, 2021Inventors: Xikai Sun, Jadav Das, Tracy M. Clark, Robert H. Schmidt, Neil R. Bentley
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Method and apparatus for commutation of drive coils in a linear drive system with independent movers
Patent number: 10951138Abstract: A motor controller is provided that executes a commutation routine in one of a plurality of operating modes to regulate current provided to drive coils in a linear motion system. The motor controller generated currents for each of the drive coils in a first operating mode to minimize the copper losses in the drive coils, in a second operating mode to maximize the force applied to the mover, in a third operating mode to provide balanced currents between the drive coils, and in a fourth operating mode to provide currents according to a selected operating point that combines characteristics of the first three operating points. The motor controller may also monitor each of the drive coils for saturation and redistribute at least a portion of the current required to control operation of the mover to the other drive coils when one of the drive coils is saturated.Type: GrantFiled: June 24, 2019Date of Patent: March 16, 2021Assignee: Rockwell Automation Technologies, Inc.Inventor: Jadav Das -
Patent number: 10876865Abstract: By configuring an encoder scale as an angled or inclined magnet or pair of oppositely arranged, adjacent magnets, a magnetic field sensor in a travel path of the scale can detect an absolute position of the scale for use in an industrial control system. Due to the angle or incline, when a first side of the scale is proximal to the sensor, the sensor can detect an angle of ?180°. As the scale moves to center with respect to the sensor, the sensor can detect an increasing angle to 0°. Then, as a second side of the scale becomes proximal to the sensor, the sensor can detect an increasing angle to +180°. The angle changes linearly with position. In one aspect, the pair of oppositely arranged magnets can be rotated with respect to the travel path to provide the angle. In another aspect, the pair of oppositely arranged magnets can be magnetized diagonally to provide the angle.Type: GrantFiled: April 7, 2020Date of Patent: December 29, 2020Assignee: Rockwell Automation Technologies, Inc.Inventors: Peter M. Smit, Xikai Sun, Jadav Das
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Publication number: 20200240810Abstract: By configuring an encoder scale as a varying scale with successively increasing or decreasing pitch, sensors in a travel path of the scale can detect a phase difference to determine an absolute position of the scale for use in an industrial control system. Due to the successively increasing or decreasing pitch, each sensor can detect successively increasing or decreasing properties (such as magnetic fields) from the scale in a uniquely identifiable pattern. By taking the difference between readings of adjacent sensors, each sensor detecting properties of the scale, an absolute position of the scale between the sensors can be determined. The principle for feedback for the encoder system is analogous to a Nonius or Vernier principle to determine absolute position.Type: ApplicationFiled: April 14, 2020Publication date: July 30, 2020Inventors: Peter M. Smit, Xikai Sun, Jadav Das
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Publication number: 20200232826Abstract: By configuring an encoder scale as an angled or inclined magnet or pair of oppositely arranged, adjacent magnets, a magnetic field sensor in a travel path of the scale can detect an absolute position of the scale for use in an industrial control system. Due to the angle or incline, when a first side of the scale is proximal to the sensor, the sensor can detect an angle of ?180°. As the scale moves to center with respect to the sensor, the sensor can detect an increasing angle to 0°. Then, as a second side of the scale becomes proximal to the sensor, the sensor can detect an increasing angle to +180°. The angle changes linearly with position. In one aspect, the pair of oppositely arranged magnets can be rotated with respect to the travel path to provide the angle. In another aspect, the pair of oppositely arranged magnets can be magnetized diagonally to provide the angle.Type: ApplicationFiled: April 7, 2020Publication date: July 23, 2020Inventors: Peter M. Smit, Xikai Sun, Jadav Das
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Publication number: 20200186063Abstract: A mover is configured to be electromagnetically propelled along a track in a linear motor track system with a force that is calculated to include compensation for gravity. A multi-axis accelerometer arranged in each segment of the track can detect an orientation or angle of the track segment for determining gravity with respect to the particular section. As a result, if the track is at an incline, such as a ramp, a desired force for moving a mover along the track can be compensated to include gravity due to the incline for achieving a desired motion result. In addition, the detected orientation of the track can be compared to an expected orientation stored by a control program to avoid a loss of performance due to physical changes in the track not matching an expected/programmed configuration of the track.Type: ApplicationFiled: February 12, 2020Publication date: June 11, 2020Inventors: David D. Van Dorpe, Mark R. Cooper, Shankemarayan Ramanarayanan, Patrick E. Ozimek, Jadav Das