Method for centralized voltage control and current balancing for parallel operation of power supply equipment

The authors have developed large-capacity power supply equipment consisting of a master and slave modules interconnected simply. Setting the master module voltage enables voltage to be set for all modules. Each module´s current is monitored and any unbalanced current is locally fed back and corrected to maintain balanced current between the component modules. A feature of this power supply equipment is its reliability during parallel redundant operation; reliability is maintained when the master module fails and the output voltage remains accurate when the slave module fails. This method was used for 5 V, 150 to 600 A power supply module designs