Amazon.com, Inc.
Monitoring of redundant UPS control systems

Abstract:

A system and method for operation of an uninterruptible power supply using redundant control systems to prevent UPS failure due to a control system failure are described. The system includes multiple control modules for each UPS of a data center operating in parallel, with a primary control board controlling operations and a secondary control board monitoring data values monitored as part of the operation by the primary control board. In the event of discrepancies between the data values at the primary and secondary control boards, the control boards may be swapped such that the secondary board becomes primary, and the faulty control board may be hot-swapped to prevent downtime of the UPS.