Dual-Power-Line Multi-Master Bus Communication for High-Current Loads
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Solution Overview
Problem
Current power supply communication systems lack a streamlined multi-master communication capability and have weak driving capacity, particularly in bus communication modes like 1-wire, mbus, and powerbus, which are inefficient for high-current loads such as motor control due to excessive power consumption and complexity.
Innovation Solution
A multi-master power supply communication system utilizing a power supply module and functional modules connected via a bus, where the power supply module sends charging and communication data, and functional modules receive and send data through the bus, enabling multi-master communication with improved driving capability using a dual power line configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If 1-wire pull-up resistor is reduced to increase output current, then current capability is improved, but communication power consumption increases
Solution Approach 1:
The patent introduces a power supply module as an intermediary device that provides dedicated power to functional modules through the bus. This separates the power supply function from the communication function, allowing the pull-up resistor to maintain its original value for reliable communication while the power supply module provides additional current capability through dedicated power lines, thus resolving the contradiction between current capability and communication power consumption.
2Power
If powerbus master-slave mode is used to provide high current, then current capability is improved, but communication efficiency decreases and host tasks become heavy
Solution Approach 1:
The patent segments the system into multiple functional modules that can operate as independent masters on the bus. Each functional module with high current load (such as motor control) can independently initiate communication and power requests, eliminating the need for a single master to manage all communication tasks. This segmentation distributes the communication burden and improves overall communication efficiency while maintaining high current capability.
Solution Approach 2:
The patent implements a dynamic master-slave relationship where functional modules can dynamically become masters when they need to communicate or request power. This dynamic role assignment allows the system to adapt to different operational scenarios, with only the necessary modules acting as masters at any given time, thus improving communication efficiency while maintaining current capability when needed.
3Device complexity
If slave station current is limited to lower than 1A due to diode, then system simplicity is maintained, but driving capability for power devices becomes insufficient
Solution Approach 1:
The patent adds another dimension to the power supply architecture by introducing dedicated power supply lines separate from the communication bus. Instead of relying solely on the communication bus current (limited by diode to <1A), functional modules can receive additional power through these dedicated lines from the power supply module. This dimensional expansion allows the system to maintain simplicity in the communication protocol while achieving high driving capability for power devices through the additional power pathway.
Data Source
AI summary
According to the present invention, the functional module is charged through the power supply module before and during communication of the functional module by using a bus connecting the power supply module and the functional module, in order to achieve multi-master power supply communication between multiple functional modules using two power lines, thus solving the technical problems of a lack of a streamlined multi-master power supply communication system and a weak driving capability in the current bus communication mode.