Power Capping System Using FETs for Transient Spike Control
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Solution Overview
Problem
Computer systems face challenges in managing sudden spikes in power consumption, which can exceed rated power limits, leading to increased heat output, cooling demands, and potential component damage, as existing power capping regimes are slow to respond and cannot effectively limit instantaneous power surges.
Innovation Solution
An enhanced power capping system that incorporates field-effect transistors (FETs) in power supply lines to quickly disconnect power from non-essential components and dynamically adjust CPU clock rates, using a power capping controller to monitor and manage processor workload demands and power consumption thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If CPU down-clocking is used to control power consumption, then power consumption is reduced, but the response time is slow (30 seconds or more)
Solution Approach 1:
The power capping system segments the power control into two independent modules: a transient module that rapidly responds to power spikes by temporarily disconnecting non-essential components via FETs, and a steady-state module that manages sustained power consumption through CPU down-clocking. This segmentation allows each module to optimize for its specific function, resolving the contradiction between rapid response and sustained power control.
Solution Approach 2:
The patent introduces FETs as intermediary devices in the power supply lines to non-essential components. These FETs act as fast-acting switches that can instantly disconnect power to peripherals when transient power spikes occur, providing a rapid response mechanism that complements the slower CPU down-clocking approach.
2Use of energy by stationary object
If power capping regime is implemented to maintain average power consumption, then cooling system requirements are reduced, but instantaneous power spikes above the threshold cannot be limited
Solution Approach 1:
The system performs preliminary action by pre-positioning FETs in the power supply lines to non-essential components before power spikes occur. When a transient power spike is detected, these pre-positioned FETs can immediately disconnect power to peripherals, preventing the spike from exceeding power supply thresholds and protecting against component damage.
Solution Approach 2:
The patent implements a dynamic power capping system that adapts its response based on the nature of the power demand. The transient module dynamically responds to sudden power spikes by rapidly switching FETs, while the steady-state module dynamically adjusts CPU frequency over longer periods. This dynamic adaptation allows the system to handle both instantaneous spikes and sustained high power consumption effectively.
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 reduces power spikes to short durations, preventing component damage and optimizing cooling system requirements by rapidly adjusting power distribution and CPU frequencies, thereby maintaining power consumption within set limits.
Implementation Method 1
An enhanced power capping system that incorporates field-effect transistors (FETs) in power supply lines to quickly disconnect power from non-essential components
Data Source
AI summary
A system, and a corresponding method, for temporarily capping power consumption includes a mechanism for determining total power consumption by a number of components, a mechanism for disconnecting and reconnecting power to one or more of the components, and a mechanism for determining when to disconnect and reconnect power to the components.