System and Method for Electromagnetic Pinning and Hybrid Control of a Linear Drive System
AssigneeRockwell Automation Technologies, Inc.
InventorsBrian M. Perreault, Yuhong Huang
Life of this patent
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Abstract
A system and method for holding position of a mover in an independent cart system includes receiving a current feedback signal corresponding to a current present in at least one coil for a linear drive system in the independent cart system. A motion command for the mover is received, where the motion command defines a desired position along a track of the independent cart system to which the mover is to travel. An electromagnetic pinning control mode is disabled while controlling operation of the at least one mover to the desired position and enabled when the at least one mover is at the desired position.
Claims20
A method for holding position of a mover in an independent cart system, the method comprising the steps of:
- receiving a current feedback signal at a controller for the independent cart system in a physical reference frame, the current feedback signal corresponding to a current present in at least one coil for a linear drive system in the independent cart system;
- generating a current reference for the at least one coil in a first operating mode with the controller to drive at least one mover to a desired position along a track in the independent cart system;
- and
- generating the current reference for the at least one coil in a second operating mode with the controller to hold the at least one mover at the desired position along the track in the independent cart system.
A system for holding position of a mover in an independent cart system, the system comprising:
- a track including a first drive member of a linear drive system;
- at least one mover including a second drive member of the linear drive system, wherein the first drive member and the second drive member operatively engage each other to drive the at least one mover along the track;
- and
- a controller configured to execute a series of instructions to:
- regulate a current present in the first drive member in a first operating mode to drive the at least one mover to a desired position along the track, and
- regulate the current present in the first drive member in a second operating mode to hold the at least one mover at the desired position.
A non-transitory computer-readable storage medium storing instructions for execution by a processor that, when executed, comprise the steps of:
- receiving a current feedback signal corresponding to a current present in at least one coil for a linear drive system in an independent cart system;
- receiving a motion command for at least one mover to travel to a desired position along a track of the independent cart system;
- disabling an electromagnetic pinning control mode while controlling operation of the at least one mover to the desired position;
- and
- enabling the electromagnetic pinning control mode when the at least one mover is at the desired position.
Dependencies are inferred from the claim text.