Sequential Power-Up Sequence for Computing Cluster PDUs

The patent segments the power-on process by dividing devices into multiple groups based on their model identification codes and commonality. Instead of powering on all devices simultaneously, the system powers on devices in sequential batches, with each batch representing a segment of the total device population. This segmentation reduces the peak inrush current at any given moment while still achieving full cluster operational status.

The patent performs preliminary actions by first identifying all devices in the cluster, obtaining their vital product data including model identification codes, and determining the commonality of each device type before initiating the power-on sequence. This preliminary analysis allows the system to plan the power-on sequence in advance, ensuring that devices are powered on in an order that prevents circuit breaker tripping while maintaining overall productivity.

The patent introduces a central management entity as an intermediary between the power distribution units and the devices. This entity coordinates the power-on sequence by receiving information about device commonality, determining the optimal power-on order, and controlling when each device should be powered on. This software-based intermediary approach achieves circuit breaker protection without requiring hardware modifications like inductors, thereby reducing system complexity.

The patent replaces the mechanical/electrical solution of adding inductors to power supplies with a control-based software system. Instead of modifying the physical power supply circuits to limit inrush current, the system uses a management entity to orchestrate the timing of device power-on events. This substitution eliminates the need for additional passive components while achieving the same reliability goal.

The patent changes the parameter of power-on timing from simultaneous to sequential based on device commonality. By grouping devices with identical or similar model identification codes together and powering on each group in succession, the system controls the inrush current profile. The batch size and timing can be adjusted as parameters to balance between preventing circuit breaker tripping and minimizing total activation time.

The patent applies partial action by powering on devices in multiple batches rather than all at once or one at a time. Each batch represents a partial completion of the total power-on task, and the process is repeated until all devices are operational. This approach finds a middle ground between simultaneous power-on (excessive action causing inrush current) and individual sequential power-on (inefficient), optimizing both reliability and time efficiency.