Patent ID: 8325504

Claim:
A direct current power supply apparatus, comprising: a plurality of transmutor modules; current and voltage sensors connected to an output of each of said transmutor modules; a droop controller connected to said output of each of said transmutor modules; a respective compensation device connected to each droop controller for adjusting an output voltage of each transmutor module under control of said droop controller; and a low bandwidth communications link connecting said droop controllers for sharing current data, wherein the droop controller implements a droop algorithm for respectively adjusting said module output voltages to compensate for droop at the respective module outputs, and said droop controller also implements a virtual bus algorithm in parallel with said droop algorithm for adjusting an output current by a correction factor calculated according to current data supplied by said low bandwidth communications link, said virtual bus algorithm being used solely for recalibration due to long term drifts.