Chassis Power Monitoring for Modular Sled Overcurrent Protection

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Solution Overview

Problem

Existing monitoring approaches for modular information handling systems in a chassis are insufficient in managing the gap between average and peak power consumption, leading to potential overheating and damage due to transient peaks in processor power consumption.

Innovation Solution

A chassis management controller is implemented to determine power consumption for each modular information handling system and communicate a message to power down the system if it exceeds the maximum sled connector current limit, thereby preventing overheating and damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing overcurrent protection circuits are configured to trip at relatively low thresholds to prevent overheating, then component safety is improved, but the gap between thermal current limit and OCP trip thresholds becomes excessively large, causing false trips during transient processor power peaks

Engineering Contradiction:

Improvecomponent safetyVSAvoidsystem availability

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The chassis management controller proactively monitors power consumption trends and issues warnings to the host management controller before overcurrent conditions occur. This preliminary action allows the system to prepare for potential shutdowns by saving state information and notifying operators, thereby maintaining component safety while reducing false trips during transient peaks.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements continuous feedback monitoring of power consumption at the chassis level, with the chassis management controller receiving real-time power data and comparing it against thermal current limits. This feedback mechanism enables dynamic adjustment of protection thresholds and timing, allowing the system to distinguish between dangerous sustained overcurrent conditions and harmless transient peaks.

Inventive Principle:

Principle #23Feedback

2Device complexity

If monitoring is performed at the individual sled level only, then device complexity is reduced, but measurement precision is insufficient to detect overall chassis power consumption patterns and shared infrastructure loads

Engineering Contradiction:

Improvemonitoring architectureVSAvoidpower consumption detection accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent merges individual sled-level monitoring with chassis-level monitoring by having the chassis management controller aggregate power consumption data from multiple sleds and shared infrastructure components. This combined approach provides comprehensive visibility into total chassis power usage, enabling accurate detection of overcurrent conditions that affect the entire system rather than individual components.

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If transient peaks in processor power consumption are allowed to reach higher levels, then productivity is improved, but the risk of overheating and exothermic events increases

Engineering Contradiction:

Improveprocessor performanceVSAvoidthermal damage risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system dynamically adjusts protection thresholds and response timing based on real-time power consumption patterns and thermal conditions. Rather than using fixed trip thresholds, the chassis management controller continuously monitors power trends and adapts its protection strategy, allowing higher transient peaks when thermal margins permit while preventing dangerous sustained overcurrent conditions.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11910558B2Chassis management controller monitored overcurrent protection for modular information handling systems

Publication Date: 2024.02.20 DELL PROD LP

AI summary

A system may include a chassis comprising a plurality of bays, each of the plurality of bays configured to receive a respective modular information handling system, a shared infrastructure comprising a plurality of components which are shared by modular information handling systems received in the plurality of bays, and a chassis management controller communicatively coupled to the plurality of bays and configured to determine a power consumption for each respective modular information handling system and if the power consumption for a respective modular information handling system exceeds a maximum sled connector current limit for the respective modular information handling system, communicate a message to the respective modular information handling system to power down the respective modular information handling system.