Phase-Based Fan Control for Server Power Stability
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Solution Overview
Problem
Existing server systems experience unstable total power consumption due to multiple power consumption peaks, exceeding the set limit of 900 W during environmental temperature tests at 25° C.
Innovation Solution
A method for controlling total power consumption by setting controller parameters based on phases, using distinct heating and cooling control parameters for a system with a heat-generating element and fan, where the controller determines the phase and adjusts fan speed accordingly to manage power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single control parameter is used for fan speed regulation, then the control system is simple, but the total power consumption exhibits multiple peaks and is unstable
Solution Approach 1:
The patent applies dynamics by transitioning from a static single control parameter to a dynamic dual-parameter system. The controller switches between heating control parameter and cooling control parameter based on the real-time thermal phase detected by comparing current temperature with previous moment temperature. This dynamic adaptation allows the system to respond differently to heating and cooling conditions, eliminating power consumption peaks while maintaining stability.
Solution Approach 2:
The patent implements parameter changes by introducing two distinct control parameters (heating control parameter and cooling control parameter) that are selected based on the thermal phase. The controller determines the phase by comparing temperature at current moment with temperature at previous moment, and switches the appropriate parameter accordingly. This parameter switching strategy resolves the contradiction by allowing optimal control behavior for different thermal conditions without increasing overall system complexity.
2Temperature
If fan speed is increased to reduce temperature, then the heat-generating element cools faster, but the power consumption increases and creates peaks
Solution Approach 1:
The patent applies feedback by continuously monitoring the temperature of the heat-generating element and comparing current temperature with previous moment temperature to determine the thermal phase. The controller then provides feedback control to the fan based on the determined phase, using appropriate heating or cooling control parameters. This feedback mechanism ensures the fan operates at optimal speeds for current thermal conditions, preventing both overheating and excessive power consumption peaks.
Solution Approach 2:
The patent resolves this contradiction through dynamic control by switching between heating and cooling control parameters based on real-time temperature phase detection. During heating phases, the system applies heating control parameters that allow faster cooling when needed. During cooling phases, it applies cooling control parameters that prevent excessive fan operation. This dynamic adaptation eliminates power peaks while maintaining effective temperature 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 effectively stabilizes total power consumption by reducing maximum transient power peaks, ensuring the system operates within the set limits while minimizing fan rotation speed fluctuations and extending equipment life.
Implementation Method 1
one fan, and one controller... the controller provides feedback control to the fan
Implementation Method 2
at least one heat-generating element... total power consumption of the system
Data Source
AI summary
A method for controlling total power consumption of system by setting controller parameters based on phases is provided, which is applied to a system at least including heat-generating element, fan, and controller. The method includes: setting the controller with heating control parameter and cooling control parameter; reading, by the controller, current temperature and temperature at a previous moment of the heat-generating element; and comparing, by the controller, current temperature with temperature at the previous moment to determine whether the heat-generating element is in heating phase or in cooling phase; in case of the heating phase, the controller provides feedback control to the fan based on the heating control parameter; in case of the cooling phase, the controller provides feedback control to the fan based on the cooling control parameter; thereby controlling the total power consumption of the system.