Power Switching Controller Architecture Using Common Reference Voltage
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Solution Overview
Problem
Conventional power distribution systems with multiphase AC switching require isolation between power channels due to varying reference voltages, leading to complex and costly architectures with redundant components for cross-communication and fault synchronization.
Innovation Solution
A control architecture where all power channels share a common reference voltage, allowing a single microcontroller module to control multiple channels without the need for individual isolated power supplies and microcontrollers, using a shared reference point to facilitate communication while preventing voltage floating issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each power channel uses a dedicated isolated power supply and microcontroller with individual isolated data buses, then channel isolation and fault protection are improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent merges multiple isolated power supplies into a single common power supply and multiple isolated microcontrollers into a single shared microcontroller. The power ground serves as a common reference for all channels, eliminating the need for individual isolated power systems. This consolidation reduces device complexity while maintaining channel isolation through the inherent electrical separation provided by the power distribution architecture.
Solution Approach 2:
The patent implements a universal microcontroller that controls multiple power channels through a single data bus. This single microcontroller performs the functions previously distributed across multiple isolated microcontrollers, including fault detection, channel control, and synchronization. The common power supply also serves universal purposes by providing reference voltage to all channels simultaneously, reducing overall system complexity.
2Reliability
If each power channel has its own isolated power supply and microcontroller, then fault isolation between channels is improved, but weight and cost increase due to redundant components
Solution Approach 1:
The patent combines multiple isolated power supplies and microcontrollers into shared common components. The single microcontroller and common power supply eliminate redundant weight from isolated components while maintaining fault isolation through the power distribution architecture and controlled grounding schemes that prevent fault propagation between channels.
3Reliability
If individual isolated data buses are used for each power channel, then communication isolation is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges multiple isolated data buses into a single shared data bus that connects the microcontroller to all power channels. This consolidation reduces data bus complexity while maintaining communication isolation through proper signal routing and electrical separation in the physical layer, allowing the single microcontroller to communicate with multiple channels without requiring isolated communication paths.
Data Source
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AI summary
A control architecture (10) for a power controller has a power line input (30), a plurality of power channels (20) that are operable to control power flow from the power line input (32) to one or more load (24,26,28), an isolated power supply, and a microcontroller module (50) that controls each of the multiple power channels (20).