Rockwell Automation Technologies Incorporated

Anorad Corporation

Peter M Smit

Xikai Sun

Oliver C Haya

Mark R Cooper

Nanwei Yao

Jadav Das

John Floresta

Peter J Bruder

Darius Bobelis

Fred Sommerhalter

Claude Chirignan

Patrick E Ozimek

Marc Koeppel

Linglai Li

Aderiano M Da Silva

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.

Method and system for contactless power transfer in a linear drive system

An improved system for determining the identification of movers in a motion control system is disclosed, where the motion control system includes multiple movers traveling on a track. The physical construction of at least one element of one of the movers is different on one mover than on each of the other movers. The control system for the movers detects the difference in construction and identifies the unique mover as a first mover. Each of the other movers along the track are assigned an identifier based on their relative position to the first mover. According to one embodiment, a position sensing system is utilized to identify the first mover. According to another embodiment, the drive system for the movers is utilized to identify the first mover. In still another embodiment, a combination of the position sensing system and the drive system is utilized to identify the first mover.

Method and apparatus for identifying a mover on a track

Method and apparatus for power transfer to an independent moving cart during travel along a track

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.

Method and apparatus for wireless power transfer to an independent moving cart

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.

Encoder system for position determination with varying scale

An improved system for determining the identification of movers in a motion control system is disclosed, where the motion control system includes multiple movers traveling on a closed track. The physical construction of at least one element of one of the movers is different on one mover than on each of the other movers. The control system for the movers detects the difference in construction and identifies the unique mover as a first mover. Each of the other movers along the track are assigned an identifier based on their relative position to the first mover. According to one embodiment, a position sensing system is utilized to identify the first mover. According to another embodiment, the drive system for the movers is utilized to identify the first mover. In still another embodiment, a combination of the position sensing system and the drive system is utilized to identify the first mover.

Method and apparatus for identifying a mover on a closed track

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 &#x2212;180&#xb0;. As the scale moves to center with respect to the sensor, the sensor can detect an increasing angle to 0&#xb0;. Then, as a second side of the scale becomes proximal to the sensor, the sensor can detect an increasing angle to +180&#xb0;. 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.

Encoder system for position determination with inclined scale

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 be 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.

Curvilinear encoder system for position determination

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.

Growing community of inventors

Mount Sinai, NY, United States of America

Peter M Smit