Server Power Supply Voltage Sampling for Far-End Stability
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Solution Overview
Problem
High-power servers face challenges in maintaining stable power supply due to long power supply distances, leading to increased line losses and poor dynamic response, which can result in power supply abnormalities during sudden pressure changes, especially at far-end components.
Innovation Solution
A power supply control method and system that involves determining target sampling points based on current scenarios and using differential amplification circuits to adjust voltages in the power supply link, ensuring stable power supply by quickly responding to fluctuations at far-end loads through controlled switching and feedback adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If busbars or large-area copper PCBs are used for current transmission, then power supply distance is extended, but line losses increase and voltage stability deteriorates
Solution Approach 1:
The power supply link is segmented into multiple sections with distributed sampling points. Instead of a single long transmission path, the system divides the power supply route into segments (near-end and far-end sampling points) and monitors each segment independently, enabling localized voltage compensation that reduces overall line losses.
Solution Approach 2:
Differential amplification circuits are introduced as intermediary devices between the power supply source and load. These circuits amplify the voltage difference signals from sampling points and enable precise voltage regulation, acting as mediators that compensate for line losses without requiring changes to the transmission infrastructure.
2Stability of the object's composition
If far-end voltage is monitored to compensate output voltage, then voltage stability at far-end is improved, but dynamic response speed deteriorates
Solution Approach 1:
The system performs preliminary voltage compensation by monitoring voltage at multiple sampling points and calculating required adjustments in advance. The differential amplification circuits pre-process the voltage difference signals, enabling the control system to respond more quickly to voltage fluctuations without waiting for far-end conditions to fully develop.
Solution Approach 2:
The system dynamically switches between different sampling points (near-end and far-end) based on operating conditions. This dynamic sampling strategy allows the system to optimize between voltage stability and response speed by selecting the appropriate sampling point according to the current power supply scenario.
3Stability of the object's composition
If buck-boost circuit is added at far-end power supply point, then voltage stability is improved, but device complexity increases
Solution Approach 1:
Instead of adding complex buck-boost circuits at the far-end, the system uses differential amplification circuits that copy and amplify the voltage difference signals from sampling points. This approach achieves voltage regulation through signal processing rather than power conversion, significantly reducing circuit complexity while maintaining voltage stability.
Solution Approach 2:
The patent replaces the mechanical/power-electronic buck-boost circuit approach with an electronic signal processing approach using differential amplification. This substitution eliminates the need for complex power conversion circuits by using voltage difference amplification and compensation, reducing both device complexity and response time.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method ensures stable power supply to far-end components by quickly responding to voltage fluctuations, improving reliability and stability of server systems.
Implementation Method 1
a first differential amplification circuit and a second differential amplification circuit are connected to the power supply link of the power supply unit, the sampling point in the power supply unit is connected to the first differential amplification circuit, and the sampling point close to the output end of the multi-path redundant circuit of the power supply unit and the sampling point arranged at the far-end load of the server motherboard are connected to the second differential amplification circuit
Data Source
AI summary
The present application discloses a power supply control method and system for a power supply unit of a server, a device, and a medium. The method includes: determining a target sampling point based on a current scenario, and obtaining a sampled voltage at the target sampling point in a power supply link of the power supply unit according to a preset rule, the target sampling point being a sampling point arranged in the power supply unit, and the preset rule representing a corresponding relationship between the sampled voltage at the target sampling point and an actual voltage; obtaining a voltage error of the power supply link through calculation based on the sampled voltage at the target sampling point; and adjusting a voltage of the power supply link of the power supply unit based on the voltage error of the power supply link.