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公开(公告)号：US20200240810A1
公开(公告)日：2020-07-30
申请号：US16847946
申请日：2020-04-14
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Peter M. Smit , Xikai Sun , Jadav Das
Abstract: 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.
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32.发明授权公开(公告)号：US10608469B2
公开(公告)日：2020-03-31
申请号：US15719021
申请日：2017-09-28
Applicant: Rockwell Automation Technologies, Inc.
Inventor： John Floresta , Peter Bruder , Xikai Sun , Peter M. Smit , Oliver C. Haya , Mark R. Cooper , Nanwei Yao
Abstract: A system and method for providing power to independent movers traveling along a track in a motion control system without requiring a fixed connection between the mover and a power source external to the mover. In one embodiment, a sliding transformer transfers power between the track and each mover. In another embodiment, an optical transmitter transfers power between the track and an optical receiver mounted on each mover. In yet another embodiment, a generator includes a drive wheel engaging the track as each mover travels along the track. A power converter on the mover receives the power generated on and/or transmitted 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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Patent Agency Ranking
公开(公告)号：US20200044593A1
公开(公告)日：2020-02-06
申请号：US16594751
申请日：2019-10-07
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Peter M. Smit , Oliver C. Haya , Mark R. Cooper , Nanwei Yao
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：US10161970B2
公开(公告)日：2018-12-25
申请号：US15470079
申请日：2017-03-27
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Linglai Li , Peter M. Smit , Oliver C. Haya , Mark R. Cooper , Nanwei Yao
IPC: G01R15/20
Abstract: The present invention provides a mover traveling along a track, the mover system having a mover frame supporting a mover sensor element and a track frame providing a path for which the mover frame travels and supporting track sensor elements for interacting with the mover sensor element of the mover frame. The interaction between the mover sensor element and track sensor elements provides an identification signal of each mover and the identification signal of each mover on the track is arranged according to a cyclic sequence where unique contiguous substrings occur only once within the sequence.
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公开(公告)号：US20180276436A1
公开(公告)日：2018-09-27
申请号：US15470079
申请日：2017-03-27
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Linglai Li , Peter M. Smit , Oliver C. Haya , Mark R. Cooper , Nanwei Yao
Abstract: The present invention provides a mover traveling along a track, the mover system having a mover frame supporting a mover sensor element and a track frame providing a path for which the mover frame travels and supporting track sensor elements for interacting with the mover sensor element of the mover frame. The interaction between the mover sensor element and track sensor elements provides an identification signal of each mover and the identification signal of each mover on the track is arranged according to a cyclic sequence where unique contiguous substrings occur only once within the sequence.
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公开(公告)号：US20180216968A1
公开(公告)日：2018-08-02
申请号：US15420548
申请日：2017-01-31
Applicant: Rockwell Automation Technologies, Inc.
Inventor： Xikai Sun , Peter M. Smit , Mark R. Cooper , Oliver C. Haya , Nanwei Yao
IPC: G01D5/20 , H02K11/215 , H02K11/225
CPC classification number: G01D5/2086 , G01D5/2046 , H02K11/225
Abstract: A curvilinear encoder is provided in which an incremental or absolute position for a cart can be detected on a track by applying one or more excitation signals and receiving one or more pick up signals. Analogous to a transformer arrangement, an encoder mover can be placed on the cart moving along the track, and an encoder stator can be placed on the track separated by a gap. The one or more excitation signals can be applied to the one or more excitation coils on the mover or the stator to generate one or more magnetic fields, and the one or more pick up signals can he received by one or more pick up coils on the mover or the stator for sensing changes in the magnetic fields produced by motion of the mover on the track.
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公开(公告)号：US20180091072A1
公开(公告)日：2018-03-29
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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