Rockwell Automation Technologies Incorporated

John James Jenks

Daniel Joseph Middlestetter

James B Vitrano

August B Schrab

Kurt R Hohensee

Semyon Royak

Robert J Breitzmann

John M Kasunich

Jimmy See Yong Koh

Teck Siang Tan

Clare Siew Ling Loke

Liew Boh Chuan

In some embodiments, a motor drive system includes a communication subassembly electrically coupled to a control subassembly for providing communication between the control subassembly and at least one external device. The control subassembly and the communication subassembly transmit and receive control data independently of messaging data, greatly enhancing performance and reducing the workload of processors on the control subassembly and communication subassembly. Additionally, the control subassembly and the communication subassembly transmit message data via sequence count based messaging. Communications between the communication subassembly and the control subassembly may include a series of timeout periods and retries, increasing reliability.

Enhanced motor drive communication system and method

A motor drive system includes a control module and a power module for generating control signals and power signals, respectively, for driving an electric motor. An add-on module or subassembly is physically positionable between the control and power modules, and communicates with the control module to allow for communication with external devices.

Modular motor drive communication system and method

A system may include broken wire detector circuitry that may include an optocoupler, encoder isolator circuitry that may include input voltage protection circuitry, an optocoupler, and output filtering circuitry, and compensator circuitry that may include signal conditioning circuitry. The broken wire detector circuitry and the encoder isolator circuitry may be configured to accept inputs signals (A, B) and an index signal (Z) for a single-ended and differential type incremental encoder. The broken wire detector circuitry may be configured to convert an input AC pulse train signal to an analog DC signal. The encoder isolator may be configured to protect from high input voltages. And, the compensator may be configured to accept outputs of the broken wire detector circuitry and the encoder isolator circuitry and to integrate and dampen the analog DC signal that has a value representative of an operating state of the incremental encoder.

System and method for incremental encoder loss detection

Active front end power conversion systems are presented having a peak detector with adjustable decay providing a signal to an overload protection component to selectively discontinue rectifier switching control signals for protection of active rectifier switches during unbalanced line voltage conditions.

Active front end power converter with diagnostic and failure prevention using peak detector with decay

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Rocky River, OH, United States of America

John James Jenks