05986909 is referenced by 135 patents and cites 12 patents.

A high output level is maintained in power supplies having multiple cells in each leg. Failed cells in any leg are bypassed to provide a current path through the respective leg. All of the unfailed cells are utilized while maintaining equal magnitude between phases and a balance phase relationship in the line-to-line output voltage. The invention may be utilized in conjunction with a peak voltage reduction circuit, and a by-pass switch.

Title
Multiphase power supply with plural series connected cells and failed cell bypass
Application Number
9/82888
Publication Number
5986909
Application Date
May 21, 1998
Publication Date
November 16, 1999
Inventor
Marc F Aiello
Allegheny County
PA, US
Peter W Hammond
Westmoreland County
PA, US
Agent
Buchanan Ingersoll P C
Assignee
Robicon Corporation
PA, US
IPC
H02M 5/458
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