Dual ring dedicated drive control system for medium voltage...

Details Dual ring dedicated drive control system for medium voltage... Dual ring dedicated drive control system for medium voltage...

2011-05-17

2011-05-17

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

C318S049000, C318S067000, C318S083000

Reexamination Certificate

active

07944157

ABSTRACT:
The present invention provides a motor drive system that is substantially more robust than those of the prior art. Generally, the motor drive system provides a redundant communication topology with the drives, thereby greatly reducing the chance of failure by a fault in the drive-to-drive communication link. Specifically, the motor drive system includes a plurality of motor drives joined by a communication media. Each motor drive has a motor control circuit configured to control the speed of an electric motor and a media access control unit having two communication modules. Each communications module includes a transmitter and a receiver joined to the communications media. A set of routing switches in the media access control unit joins the communication modules to connect the motor drives in an independent primary and a secondary ring communicating data for controlling the motor drives.

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European Search Report for Appl. No. 09150445.6, dated May 20, 2009.

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