# US 2019/0317580 A1 · Method of Determining a Configuration of Multiple Power Supply Units of a Computer System > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0317580 A1 - Document ID: US20190317580A1 - Status: Published application - Kind: A1 - Application number: 16/379,149 - Filed: 2019-04-09 - Published: 2019-10-17 - Earliest claimed: 2018-04-12 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Yi-Lan Yang - Web page: https://patentgrep.com/patent/US20190317580A1 ## CPC - H02J 3/26: Arrangements for eliminating or reducing asymmetry in polyphase networks - G06F 1/26: Power supply means, e.g. regulation thereof (for memories G11C) - G06F 1/263: {Arrangements for using multiple switchable power supplies, e.g. battery and AC (G06F1/30 takes precedence)} - G06F 1/28: Supervision thereof, e.g. detecting power-supply failure by out of limits supervision - H02J 3/40: Synchronisation of generators for connection to a network or to another generator - H02J 3/46: Controlling the sharing of generated power between the generators, sources or networks - H02J 2105/425: {the loads being an Information and Communication Technology [ICT] facility} - Y02E 40/50: Arrangements for eliminating or reducing asymmetry in polyphase networks - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A method of determining a configuration of multiple power supply units of a computer system. According to the method, in a first step a time shift between different synchronization signals is evaluated, wherein the different synchronization signals are associated with different power supply units among the multiple power supply units of the computer system. In a subsequent step, a connection configuration of the different power supply units is determined from the evaluated time shift. In this regard, a predetermined first time shift characteristic is associated with a connection configuration of the different power supply units to different power phases of a multiple phase power system, whereas a predetermined second time shift characteristic is associated with a connection configuration of the different power supply units to one shared power phase of the multiple phase power system. With such a method a power management of the computer system may be enhanced. ## Claims ### Claim 1 Method of determining a configuration of multiple power supply units of a computer system with the following steps: evaluating a time shift between different synchronization signals, wherein the different synchronization signals are associated with different power supply units among the multiple power supply units of the computer system, and determining a connection configuration of the different power supply units from the evaluated time shift, wherein a predetermined first time shift characteristic is associated with a connection configuration of the different power supply units to different power phases of a multiple phase power system, and wherein a predetermined second time shift characteristic is associated with a connection configuration of the different power supply units to one shared power phase of the multiple phase power system. ### Claim 2 (depends on 1) Method according to claim 1, wherein each synchronization signal is generated from a zero-crossing detection of a periodic AC supply voltage of the respective power phase of the respective power supply unit. ### Claim 3 (depends on 1) Method according to claim 1, wherein each synchronization signal is generated within the respective power supply unit and is transmitted to a separate evaluation component of the computer system, wherein the evaluation component performs the steps of evaluating the time shift between the different synchronization signals and determining a connection configuration of the different power supply units from the evaluated time shift. ### Claim 4 (depends on 1) Method according to claim 1 with the further steps: evaluating predetermined power characteristics of each power supply unit of the computer system and/or of the respective power phase connected to the respective power supply unit, and adapting a power delivery percentage for each power supply unit of the computer system depending on the evaluated predetermined power characteristics and depending on the determined connection configuration of the different power supply units. ### Claim 5 Computer system with multiple power supply units and an evaluation component, wherein the evaluation component is configured: to evaluate a time shift between different synchronization signals associated with different power supply units among the multiple power supply units of the computer system and to determine a connection configuration of the different power supply units from the evaluated time shift, wherein a predetermined first time shift characteristic is associated with a connection configuration of the different power supply units to different power phases of a multiple phase power system, and wherein a predetermined second time shift characteristic is associated with a connection configuration of the different power supply units to one shared power phase of the multiple phase power system. ### Claim 6 (depends on 5) Computer system according to claim 5, wherein each of the different power supply units is configured to generate the respective synchronization signal and to transmit the respective synchronization signal to the evaluation component. ### Claim 7 (depends on 5) Computer system according to claim 5, wherein the evaluation component is provided on a system board of the computer system. ### Claim 8 (depends on 5) Computer system according to claim 5, wherein the evaluation component is further configured: to evaluate predetermined power characteristics of each of the different power supply units and/or of the respective power phase connected to the respective power supply unit, and to adapt a power delivery percentage for each of the different power supply units depending on the evaluated predetermined power characteristics and depending on the determined connection configuration of the different power supply units. ### Claim 9 (depends on 5) Computer system according to claim 5, wherein the evaluation component and the multiple power supply units are connected via a communications bus or hardware wiring. ### Claim 10 (depends on 5) Computer system according to claim 5, wherein the computer system is configured as a rack server.