Dynamic Thermal Controller for IHS Component Temperature Regulation
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Solution Overview
Problem
Information handling systems (IHSs) face challenges in maintaining both instantaneous component maximum temperature and long-term average temperature for reliability, leading to potential component failures and increased acoustic noise due to excessive fan speeds.
Innovation Solution
A thermal control system that uses a thermal controller to manage fan speeds based on both instantaneous component maximum temperature and long-term average temperature targets, employing a processor subsystem to determine variable air mover rates and prevent component overheating while optimizing fan speeds for reliability and acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If fan speeds are reduced to lower acoustic noise and power consumption, then component temperatures increase and reliability decreases
Solution Approach 1:
The patent implements dynamic fan speed control that adjusts cooling rates based on real-time temperature monitoring and component age. The system transitions from static high-speed cooling to adaptive variable-speed operation, where fan speeds are modulated according to actual thermal conditions and component reliability requirements, thereby reducing acoustic noise while maintaining adequate cooling for reliability
Solution Approach 2:
The system employs feedback control through temperature sensors that continuously monitor component temperatures and feed this information back to the thermal controller. This closed-loop feedback mechanism enables the system to adjust fan speeds dynamically based on actual thermal conditions, preventing both overheating (which would compromise reliability) and excessive cooling (which would increase noise and power consumption)
2Reliability
If maximum fan speed is used to reduce average operating temperature, then reliability improves but acoustic noise and power consumption increase
Solution Approach 1:
The system replaces static maximum fan speed operation with dynamic variable-speed control. Fan speeds are adjusted in real-time based on temperature sensor feedback and component age, enabling the system to achieve reliability targets with lower average power consumption by cooling only when and where needed, rather than maintaining constant maximum cooling capacity
Solution Approach 2:
The patent changes the operational parameters of the fan from fixed maximum speed to variable speed based on multiple factors including component age, real-time temperature, and reliability requirements. This parameter change allows the system to optimize the balance between cooling effectiveness (for reliability) and power consumption by adjusting fan speed to the minimum necessary level
3Duration of action of stationary object
If fan speeds are increased to maintain lower average temperature, then component lifetime extends but acoustic noise increases
Solution Approach 1:
The system implements dynamic fan speed modulation based on component age and thermal conditions. As components age, the system may increase cooling to extend service life, but only when temperature conditions warrant it. This dynamic approach extends component lifetime through targeted cooling while minimizing acoustic noise by avoiding continuous high-speed fan operation
Solution Approach 2:
The system performs preliminary cooling actions when temperature thresholds are approached, preventing excessive temperature accumulation that would require more aggressive (noisier) cooling later. By taking preliminary cooling action at moderate fan speeds, the system extends component service life while avoiding the acoustic noise associated with sustained high-speed fan operation
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 solution effectively regulates component temperatures to prevent failures and reduce acoustic noise, balancing short-term and long-term reliability requirements while minimizing fan power consumption.
Implementation Method 1
an air mover that moves a variable rate of cooling air through the housing to remove thermal energy from the one or more thermal-generating components
Data Source
AI summary
An Information Handling System (IHS) and method provide for a thermal controller receiving from a temperature sensor a current operating temperature of the at least one functional device. The thermal controller determines a first rate of an air mover based at least in part on the current operating temperature sensed by the temperature sensor and the instantaneous component maximum temperature. The first rate prevents the at least one functional component from exceeding the instantaneous component maximum temperature. The thermal controller determines a second rate of the air mover based at least in part on lifetime average temperature and the long-term average temperature target that is selected for the reliability level. The thermal controller controls the air mover to operate at a higher one of the first and second rates.