Thermal Manager for Dynamic Cooling Fan Control in I/O Cards
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Solution Overview
Problem
Current thermal management systems in information handling systems often lack sufficient input parameters to accurately determine the thermal health of components like PCI and I/O cards, leading to inefficient cooling and increased power consumption, as they typically rely on static airflow settings that assume worst-case scenarios.
Innovation Solution
A system with temperature sensors and a thermal manager that estimates thermal conditions based on power consumption and airflow requirements, dynamically adjusting cooling fan speeds to optimize airflow velocity and cubic airflow rates, ensuring precise thermal control across the information handling system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static airflow settings are used to cool I/O cards, then thermal control is simplified, but cooling efficiency deteriorates due to worst-case assumptions leading to excessive airflow
Solution Approach 1:
The patent implements dynamic thermal management by transitioning from static airflow settings to adaptive cooling control. The system continuously monitors thermal parameters (temperatures, power consumption) of I/O cards and dynamically adjusts air mover speeds accordingly. This allows the cooling system to adapt to actual thermal conditions rather than operating at fixed worst-case settings, thereby reducing energy consumption while maintaining adequate thermal control.
Solution Approach 2:
The patent employs feedback mechanisms by utilizing thermal sensors and power consumption data from I/O cards to inform cooling control decisions. The system measures actual thermal parameters and uses this feedback to adjust air mover operation in real-time. This closed-loop approach enables the system to respond to actual thermal needs rather than relying on predetermined static settings, optimizing the balance between cooling effectiveness and energy consumption.
2Loss of energy
If manual configuration of cooling levels is required, then cooling can be optimized, but user experience deteriorates due to complexity and risk
Solution Approach 1:
The patent implements self-service thermal management by enabling the system to automatically optimize its own cooling without requiring user intervention. The thermal manager autonomously monitors thermal parameters, determines appropriate cooling levels, and adjusts air mover speeds accordingly. This eliminates the need for users to manually configure cooling settings, removing the associated complexity and risks while maintaining optimized cooling performance through automated decision-making.
Solution Approach 2:
The system uses feedback from thermal sensors and power consumption measurements to automatically adjust cooling levels without user input. The thermal manager continuously receives thermal data, processes this information, and makes real-time adjustments to air mover operation. This automated feedback loop replaces manual configuration with intelligent self-adjustment, achieving optimized cooling while simplifying user interaction to zero.
3Measurement precision
If temperature sensors are installed on all components, then thermal measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces a thermal manager as an intermediary component that mediates between limited thermal sensors and the cooling control system. Rather than requiring sensors on every component, the thermal manager uses power consumption data from I/O cards combined with data from existing sensors to estimate thermal conditions. This intermediary processing layer enables adequate thermal measurement precision without the complexity and cost of installing sensors on all components.
Solution Approach 2:
The patent replaces physical temperature sensors with virtual thermal sensing based on power consumption measurements. Instead of relying solely on thermal sensors to detect temperature, the system uses electrical power data from I/O cards as a proxy for thermal generation. This substitution reduces the need for physical sensors while maintaining sufficient thermal information for effective cooling control.
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 approach reduces energy wastage by tailoring cooling to actual thermal needs, enhancing user experience by minimizing manual configuration risks and improving component lifespan through adaptive thermal management.
Implementation Method 1
a plurality of temperature sensors configured to sense temperatures at a plurality of locations associated with an information handling system
Implementation Method 2
a cooling subsystem comprising at least one cooling fan configured to generate a cooling airflow in the information handling system
Implementation Method 3
based on at least a power provided to a subsystem of the information handling system, estimate a thermal condition proximate to the subsystem
Data Source
AI summary
In accordance with these and other embodiments of the present disclosure, a system may include a plurality of temperature sensors configured to sense temperatures at a plurality of locations associated with an information handling system, a cooling subsystem comprising at least one cooling fan configured to generate a cooling airflow in the information handling system, and a thermal manager communicatively coupled to the plurality of temperature sensors and the cooling subsystem. The thermal manager may be configured to, based on at least a power provided to a subsystem of the information handling system, estimate a thermal condition proximate to the subsystem, based on a maximum power consumption for a component of the subsystem, determine an estimated linear airflow velocity requirement for the component, and set a speed of the at least one cooling fan based on the estimated thermal condition and the estimated linear airflow velocity requirement.