Distributed USB-C Power Modules for Shared Policy Management
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Solution Overview
Problem
Existing USB Power Distribution Systems are limited by the inability to share System Policy Management across multiple USB Type-C ports, restricting the capability to manage power distribution efficiently and safely across multiple power converters.
Innovation Solution
A distributed system policy management protocol is implemented using multiple power distribution modules connected in parallel, each with a microcontroller and a bus interface, allowing them to communicate and manage power distribution dynamically based on a shared power system database, ensuring that the total power load does not exceed the available system power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only one System Policy Manager and one Primary power Converter are permitted to be active on the USB bus at one time, then power distribution control is simplified and safe, but the capability to manage power distribution efficiently across multiple power converters is restricted
Solution Approach 1:
The system divides the power distribution management function into multiple independent System Policy Manager modules, each capable of autonomous operation. Each SPM module can manage a portion of the total power load, allowing the system to scale from single-converter to multi-converter configurations without requiring complete system reconfiguration.
Solution Approach 2:
Multiple SPM modules and Primary power Converters are combined into a coordinated system where each module communicates through the USB bus. The modules work together as a unified power distribution system, sharing the total power management responsibility while maintaining individual operational autonomy.
2Adaptability or versatility
If multiple powered USB type-C ports are connected together to share System Policy Management, then power distribution flexibility and efficiency are improved, but system complexity and coordination requirements increase
Solution Approach 1:
Each SPM module is designed with universal functionality to operate independently while also participating in multi-module coordination. The modules can function as standalone power managers or as part of a distributed system, adapting to different configuration scenarios without requiring different hardware designs.
Solution Approach 2:
The system implements feedback mechanisms where each SPM module monitors power consumption, available capacity, and system state, then adjusts its power distribution decisions accordingly. Modules exchange status information through the USB bus, enabling dynamic coordination that reduces complexity through standardized communication protocols.
Data Source
AI summary
A power distribution system includes a plurality of power distribution modules connected to at least one power supply and configured to receive power therefrom. A power distribution bus connects the power distribution modules of the plurality of power distribution modules in parallel. The plurality of power distribution modules executes a distributed system policy management protocol over the power distribution bus to control a supply of available power from the at least one power supply to loads connected to USB charging ports of the power distribution modules.