Asymmetric Power Supply Units for Server Load Efficiency
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Solution Overview
Problem
Traditional power supply units in server racks are optimized for higher loads and become less efficient at lighter loads, leading to suboptimal performance and energy wastage, as they are designed to operate redundantly without considering varying load conditions.
Innovation Solution
Implementing a power supply system with two units having different efficiency profiles, where one unit is activated based on load conditions, with current modules and variable slope circuits controlling which unit is on or off to maximize efficiency by using the most efficient unit for the current load, ensuring continuous power and optimal energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If identical power supply units are used in redundant mode, then reliability is improved, but energy efficiency deteriorates at lighter loads
Solution Approach 1:
The patent applies asymmetry by using two power supply units with different efficiency profiles - one optimized for light loads and another for heavy loads. This asymmetric configuration allows the system to select the most efficient unit based on actual load conditions, resolving the contradiction between reliability (through redundancy) and energy efficiency (through load-appropriate optimization).
Solution Approach 2:
The patent implements dynamics by enabling the system to dynamically switch between different power supply units based on real-time load detection. The controller monitors load conditions and activates the appropriate power supply unit, transforming the static redundant configuration into a dynamic system that adapts to varying operational requirements to optimize energy efficiency while maintaining reliability.
2Power
If power supply units are optimized for higher loads, then power capability is improved, but efficiency at lighter loads deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the power supply function into two distinct units, each optimized for specific load ranges. One unit is segmented for light load operation while the other is segmented for heavy load operation. This segmentation allows each unit to operate in its optimal efficiency range, resolving the contradiction between power capability and efficiency at lighter loads.
Solution Approach 2:
The patent implements local quality by designing power supply units with different efficiency characteristics tailored to specific operational conditions. Each unit has localized optimization for its target load range, with the light-load unit featuring high efficiency at low power consumption and the heavy-load unit featuring high efficiency at high power consumption, thus resolving the universal efficiency contradiction.
3Reliability
If redundant power supply configuration is implemented, then system availability is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a controller that performs multiple functions: it monitors load conditions, detects failures, determines which power supply unit to activate, and manages the switching between units. This multi-functional controller consolidates what would otherwise require separate components, reducing overall system complexity while maintaining the reliability benefits of redundant power supply configuration.
Data Source
AI summary
A power supply system for a server includes a first power supply, a second power supply, a first variable slope circuit, and a second variable slope circuit. The first power supply unit is adapted to activate if a load is below a predetermined level, and adapted to deactivate if the load is above the predetermined level. The second power supply unit is adapted to activate if the load is above the predetermined level, and adapted to deactivate if the load is below the predetermined level. The first and second variable slope circuits are adapted to receive information about the load applied to the power supply units. The first variable slope circuit is adapted to deactivate the first power supply unit if the load is above the predetermined level. The second variable slope circuit is to deactivate the second power supply unit if the load is below the predetermined level.