| US 7,518,264 B1 | ||
| Digital current share method for power supplies in parallel | ||
| Randhir Malik, Cary, N.C. (US); Eino Alfred Lindfors, Raleigh, N.C. (US); and Cecil Charles Dishman, Raleigh, N.C. (US) | ||
| Assigned to International Business Machines Corporation, Armonk, N.Y. (US) | ||
| Filed on May 29, 2008, as Appl. No. 12/128,949. | ||
| Int. Cl. H02J 1/10 (2006.01); H02M 7/00 (2006.01) | ||
| U.S. Cl. 307—43 [307/52; 363/65] | 1 Claim |
| 1. A method of digital current sharing comprising:
using digital current sharing to eliminate oscillations during current sharing by providing a first power supply that is carrying
current:
forcing said first power supply to raise its current in steps until the currents of said first power supply and that of a
second power supply are brought within a certain matching current tolerance of one another by digitizing the currents of said
first power supply and said second power supply, applying both digitized currents to a subtraction circuit and adding the
positive output of said subtraction circuit to a digitized reference of said first power supply, wherein said second power
supply is in parallel with said first power supply,
using software and hardware to shape a trajectory of said matching current; and
discontinuing said digital current sharing when the current of said first power supply reaches within a specified current
tolerance with the current of said second power supply.
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