Server Power Supply Backup Mode With Dynamic Load Sharing
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Solution Overview
Problem
Conventional power supply systems with two power supplies connected in parallel are limited in operation modes, as each supply must bear equal loads and output power, lacking flexibility to adapt to varying load conditions.
Innovation Solution
A server system with a master power supply and a slave power supply that can adjust their output power ratios dynamically based on the total load and a power setting value, allowing for multiple operating modes to accommodate different usage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two power supply devices are connected in parallel in conventional mode, then power supply redundancy is achieved, but each power supply must bear equal load and output equal power, limiting operational flexibility
Solution Approach 1:
The patent introduces asymmetric operation modes where one power supply device operates as a master and the other as a slave. In this configuration, the master power supply can operate at full capacity while the slave power supply operates at reduced capacity or in standby mode, breaking the symmetric equal-load constraint of conventional parallel operation. This allows flexible power distribution ratios (e.g., 100:0, 70:30, 50:50) to adapt to different operational scenarios while maintaining redundancy.
Solution Approach 2:
The patent implements dynamic switching between different operation modes (conventional parallel mode, backup mode, and split power supply mode). The system can dynamically adjust the operational state of each power supply device based on load requirements, allowing transition from equal power distribution to asymmetric distribution and back, thereby achieving both reliability and adaptability.
2Device complexity
If two power supply devices operate in conventional parallel mode with equal power output, then system simplicity is maintained, but the application scope is limited due to lack of multiple operating modes
Solution Approach 1:
The patent makes the power supply system universal by enabling it to perform multiple functions through different operation modes. The same two power supply devices can operate in conventional parallel mode for simple applications, in backup mode for high-reliability scenarios, or in split power supply mode for asymmetric load requirements. This multi-functionality expands the application scope without adding more hardware components.
Solution Approach 2:
The system dynamically adapts its operational characteristics based on control signals, transitioning between conventional parallel operation, backup operation, and split power supply operation. This dynamic capability allows the system to match different application requirements while maintaining a simple two-device architecture.
Data Source
AI summary
Disclosed are a server system and a power management method thereof. The power management method includes: in a backup mode, making a first power supply that is a master power supply to receive a power setting value and limiting a first output power value of the master power supply to be no greater than a power setting value; and in the backup mode, making a second power supply that is a slave power supply to be activated, and controlling an output power of the slave power supply to be a second output power value, wherein the second output power value is set according to a difference between a total load of the power supply device and the first output power value.