Server Fan Control for Extension Card Heat Dissipation
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Solution Overview
Problem
In server systems, the lack of standby voltage to fans on extension card modules leads to heat accumulation, potentially damaging the modules due to inadequate heat dissipation when the system switches to standby mode.
Innovation Solution
A server system design that includes a main power supply, a standby power supply, an extension card module, and a fan module, where a controller manages the application of voltage to the fans based on the presence of extension cards, ensuring that fans are only powered when necessary to prevent heat buildup and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If standby voltage is not provided to the fan during standby mode, then energy consumption is reduced, but heat dissipation capability deteriorates causing heat accumulation on extension card modules
Solution Approach 1:
The patent applies dynamics by making the fan's power state changeable between standby mode and normal mode. The fan can be dynamically switched between off state (during standby) and on state (during normal operation) based on system power state, allowing the system to adapt between energy saving and heat dissipation requirements
Solution Approach 2:
The patent applies preliminary action by detecting extension card insertion before the system enters standby mode. The controller detects whether an extension card is inserted in advance, and based on this detection result, determines whether to maintain fan operation during standby, preventing heat accumulation before it occurs
2Temperature
If standby voltage is provided to the fan during standby mode, then heat dissipation capability is maintained, but energy consumption increases
Solution Approach 1:
The patent applies local quality by providing differentiated power supply to the fan based on local conditions. Instead of uniformly powering or not powering the fan, the system selectively provides standby voltage to the fan only when an extension card is detected, creating a localized power supply strategy that matches actual heat generation needs
Solution Approach 2:
The patent applies self-service by enabling the system to automatically detect extension card insertion and autonomously determine fan power state. The controller self-manages the fan's power supply based on detected conditions, eliminating the need for manual intervention or continuous full-power operation
3Temperature
If the fan is continuously operated during standby mode, then heat accumulation is prevented, but unnecessary energy consumption occurs when no extension card is inserted
Solution Approach 1:
The patent applies feedback by using the extension card insertion detection signal to control fan operation. The controller receives feedback about whether an extension card is inserted and adjusts fan power state accordingly, creating a closed-loop control system that matches fan operation to actual heat generation requirements
Solution Approach 2:
The patent applies parameter changes by changing the fan's power state parameter based on system conditions. The fan transitions between different operational parameters (off state, standby voltage, full voltage) depending on whether the system is in standby mode and whether an extension card is detected, optimizing both energy consumption and heat dissipation
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
This solution effectively prevents heat accumulation on extension card modules by ensuring fans are only active when extension cards are inserted, enhancing heat dissipation efficiency and reducing energy usage by dynamically controlling voltage states.
Implementation Method 1
at least one fan of the fan module is used for dissipating heat from the extension card module
Data Source
AI summary
A server system and a heat dissipation control method thereof are provided. A main power supply and a standby power supply respectively supplying a main voltage and a standby voltage of the server system are provided. An extension card module including at least one extension card slot allowing at least one extension card to insert into, is provided. A fan module including at least one fan used for dissipating heat from the extension card module is provided. When the main voltage is applied to the server system, the main voltage is applied to the fan to drive the fan. When the standby voltage is applied to the server system, the extension card module is determined whether to be inserted in any extension card. If yes, the standby voltage is applied to the fan to drive the fan; otherwise, the standby voltage is interrupted to stop the fan.