Dynamic Energy Delivery on Communication Buses
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Solution Overview
Problem
In network configurations where power and communication signals are delivered over the same bus, large in-rush currents during energy storage periods can distort communication signals, and current limit circuits, while reducing this impact, increase the time required for energy replenishment in devices.
Innovation Solution
Implementing a dynamic energy delivery system that calculates a predetermined recovery time based on message types and lengths, allows extra recovery time for bus voltage recovery, and includes an extra current limit circuit to increase power supply current, enabling more efficient energy storage and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a current limit circuit is added to the power supply to reduce distortion of communication signals, then communication signal quality is improved, but the time required to replenish energy in network devices increases
Solution Approach 1:
The patent implements dynamic control of the current limit circuit based on the operational state of network devices. The master controller adjusts the current limit parameter in real-time: when devices are in energy storage mode, the current limit is increased to allow faster energy replenishment; when devices are actively communicating, the current limit is reduced to prevent signal distortion. This dynamic adjustment resolves the contradiction by making the current limit adaptive rather than static.
Solution Approach 2:
The patent changes the current limit parameter of the power supply based on detected communication patterns and device energy states. The master controller monitors communication traffic and device energy levels, then modifies the current limit parameter accordingly. This parameter change allows the system to optimize between signal quality and energy replenishment speed by selecting appropriate current limit values for different operational conditions.
2Use of energy by moving object
If energy is delivered continuously to replenish storage circuits, then energy availability is improved, but communication signals become distorted due to large in-rush currents
Solution Approach 1:
The patent implements periodic energy delivery to network devices rather than continuous delivery. The master controller schedules energy replenishment during designated storage periods when communication activity is minimal or suspended. This periodic action allows energy storage circuits to be recharged in controlled intervals, preventing large in-rush currents during active communication while ensuring energy availability when needed.
Solution Approach 2:
The patent performs preliminary energy storage replenishment before communication activities that require high energy. The master controller detects upcoming communication tasks and pre-charges device energy storage circuits during idle periods. This preliminary action ensures devices have sufficient energy ready before communication begins, avoiding the need for high-current delivery during critical communication moments that would cause signal distortion.
Data Source
AI summary
Systems and methods for delivering energy on a bus used for communication between devices are provided. Systems and methods dynamically provide a predetermined recovery time between communication messages calculated from forward and response message types and/or length, and a model of the energy reserve in the network devices to allow time for energy storage circuits in the devices to charge. In addition or alternatively, systems and methods provide an extra recovery time between messages to allow the bus voltage to recover from a fold-back mode and/or include an extra current limit circuit to increase a power supply current when the combined energy required by the network devices is greater than a current limit on a power supply.