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公开(公告)号：US11431233B2
公开(公告)日：2022-08-30
申请号：US16585297
申请日：2019-09-27
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Gennadi Sizov , Michael J. Melfi
Abstract: A system to reduce eddy currents and the resulting losses in a synchronous motor includes at least one pick-up coil mounted to the rotor. Each pick-up coil may be located proximate a pole on the rotor. A voltage applied to the stator to control the synchronous motor includes both a fundamental component and harmonic components. The fundamental component interacts with a magnetically salient structure in each pole on the rotor to cause rotation of the rotor. The harmonic components induce a voltage in the pick-up coil. The portion of the harmonic components that induce a voltage in the pick-up coil no longer generate eddy currents within the motor. The energy harvested by the pick-up coil may also be utilized in a function other than driving the motor, such as powering a sensor mounted on the rotor.
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公开(公告)号：US10483895B2
公开(公告)日：2019-11-19
申请号：US15686752
申请日：2017-08-25
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Peter M. Smit , Oliver C. Haya , Mark R. Cooper , Nanwei Yao
IPC: H02P6/00 , H02P6/04 , B60L15/00 , B65G54/02 , H01F38/14 , H02J50/10 , H02K41/03 , H02P27/06 , H02P25/064
Abstract: A system and method for wirelessly providing power to independent movers traveling along a track includes a sliding transformer to transfer power between the track and each mover. The sliding transformer includes a primary winding extending along the track and a secondary winding mounted to each mover. Each of the primary and secondary windings may be formed of a single coil or multiple coils. The primary and secondary windings are generally aligned with each other and extend along the track and along the mover in the direction of travel with an air gap present between the windings. A power converter on the mover may regulate the power supplied to the mover to control an actuator or a sensor mounted on the mover or to activate drive coils mounted on the mover to interact with magnets mounted along the track and, thereby, control motion of each mover.
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公开(公告)号：US10284121B2
公开(公告)日：2019-05-07
申请号：US15335522
申请日：2016-10-27
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Gennadi Sizov , Robert H. Schmidt
Abstract: An IPM motor in which the absolute position of the rotor may be determined is disclosed. The IPM motor includes asymmetries in both the rotor and the stator. The rotor includes an asymmetrical pole configuration for one of the pole pairs in the rotor, and the stator includes a different number of turns for each winding of one phase of the motor. The different number of turns on each winding causes a different magnitude of flux to be generated with each winding. The flux interacts with the asymmetrical pole pair to identify to which winding the asymmetrical pole is proximate. A position sensing routine identifies an angular position with respect to each winding. The position sensing routine, in combination with the flux interaction between the windings and the asymmetrical pole provide an absolute position of the rotor within the IPM motor.
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公开(公告)号：US20180216967A1
公开(公告)日：2018-08-02
申请号：US15911808
申请日：2018-03-05
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Peter M. Smit , Mark R. Cooper , Oliver C. Haya , Aderiano M. da Silva
IPC: G01D5/20
CPC classification number: G01D5/2046 , G01D5/145 , G01D5/2073
Abstract: A linear and curvilinear encoder is provided in which absolute mechanical position and high resolution position determination can be obtained using a cart having a mover with “hybrid” teeth, configured in a curvilinear profile or shape, moving along a curvilinear track with a stator having teeth. The absolute mechanical position and high resolution position determination can be detected on the track by applying an excitation signal to a coil surrounding particular teeth of the stator to produce an electromagnetic (EM) field which can be influenced by the profile or shape of the teeth of the mover. A resulting pick-up signal can then be detected in a pick-up coil surrounding particular teeth of the stator with different harmonics in the pick-up signal corresponding to harmonics of the profile or shape of the teeth.
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5.发明授权公开(公告)号：US11539244B2
公开(公告)日：2022-12-27
申请号：US17406735
申请日：2021-08-19
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Jadav Das , Xikai Sun , Shankha S. Seal , Dayin Xu , Tracy M. Clark , John Floresta
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20210099119A1
公开(公告)日：2021-04-01
申请号：US16587177
申请日：2019-09-30
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Jadav Das , Tracy M. Clark , Robert H. Schmidt , Neil R. Bentley
Abstract: 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.
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公开(公告)号：US20210099041A1
公开(公告)日：2021-04-01
申请号：US16585297
申请日：2019-09-27
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Gennadi Sizov , Michael J. Melfi
Abstract: A system to reduce eddy currents and the resulting losses in a synchronous motor includes at least one pick-up coil mounted to the rotor. Each pick-up coil may be located proximate a pole on the rotor. A voltage applied to the stator to control the synchronous motor includes both a fundamental component and harmonic components. The fundamental component interacts with a magnetically salient structure in each pole on the rotor to cause rotation of the rotor. The harmonic components induce a voltage in the pick-up coil. The portion of the harmonic components that induce a voltage in the pick-up coil no longer generate eddy currents within the motor. The energy harvested by the pick-up coil may also be utilized in a function other than driving the motor, such as powering a sensor mounted on the rotor.
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公开(公告)号：US10480961B2
公开(公告)日：2019-11-19
申请号：US15911808
申请日：2018-03-05
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Peter M. Smit , Mark R. Cooper , Oliver C. Haya , Aderiano M. da Silva
Abstract: A linear and curvilinear encoder is provided in which absolute mechanical position and high resolution position determination can be obtained using a cart having a mover with “hybrid” teeth, configured in a curvilinear profile or shape, moving along a curvilinear track with a stator having teeth. The absolute mechanical position and high resolution position determination can be detected on the track by applying an excitation signal to a coil surrounding particular teeth of the stator to produce an electromagnetic (EM) field which can be influenced by the profile or shape of the teeth of the mover. A resulting pick-up signal can then be detected in a pick-up coil surrounding particular teeth of the stator with different harmonics in the pick-up signal corresponding to harmonics of the profile or shape of the teeth.
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公开(公告)号：US20170178782A1
公开(公告)日：2017-06-22
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
CPC classification number: H01F27/085 , H01F3/10 , H01F27/306
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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10.发明授权公开(公告)号：US11787649B2
公开(公告)日：2023-10-17
申请号：US17224322
申请日：2021-04-07
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Shankha S. Seal , Jadav Das , Tracy M. Clark , Michaela R. Kaufmann , Dayin Xu , Xikai Sun , John Floresta
IPC: B65G67/12 , B60W40/11 , B60W40/112 , B60W40/114
CPC classification number: B65G67/12 , B60W40/11 , B60W40/112 , B60W40/114 , B60W2300/40
Abstract: 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.
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