Rockwell Automation Technologies Incorporated

Mark S Ruetty

Mark A Flood

Anthony J Cachat

Steven A Zuponcic

Joseph V Kreinbrink

Joseph S Klak

James Huang

An apparatus for an alpha trim adjustment includes a phase delay circuit that creates a phase delay for a gate signal for a switching cycle. The gate signal is for a phase of a three-phase, phase shifted alternating current ('AC') input of a multi-pulse motor drive powering a direct current ('DC') motor. The apparatus includes an alpha trim circuit that modifies the phase delay with an alpha trim adjustment to create an adjusted phase delay for the switching cycle, a delay application circuit that applies the adjusted phase delay to the gate signal.

Frequency and load balance compensated, gate firing phase shift delay line

Systems and methods are disclosed for time synchronization of operations in a control system. Synchronization networks and devices are provided for transferring synchronization information between controllers in a distributed or localized control system, which is employed in order to allow operation of such controllers to be synchronized with respect to time. Also disclosed are synchronization protocols and hardware apparatus employed in synchronizing control operations in a control system.

Apparatus for multi-chassis configurable time synchronization

Protocol and method for multi-chassis configurable time synchronization

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Mayfield Heights, OH, United States of America

Mark S Ruetty