Dynamic Power Data Bus Interface for High Current Transmission
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Solution Overview
Problem
Existing systems for transmitting power and data between a control unit and slaves, such as sensors, are limited by the need for separate cables and inefficient use of energy, restricting the power output to only a few watts or hundred milliamperes, and are not adaptable to varying demands.
Innovation Solution
A method and system using a pair of lines to dynamically alternate phases for power and data transmission, allowing flexible adaptation of power and data rates, eliminating the need for separate cables and energy storage, and enabling higher power transmission through a dynamic interface like DSI, which switches between power and data phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate cables are used for power and data transmission, then reliability is improved, but device complexity and weight increase
Solution Approach 1:
The patent combines power transmission and data transmission into a single communication line, eliminating the need for separate power cables and connectors. This merging reduces device complexity and weight while maintaining reliable power delivery through controlled alternating phases of power supply and data communication.
Solution Approach 2:
The communication line is designed to serve multiple functions: it transmits both power and data signals. By implementing a dynamic interface that can switch between power transmission mode and data transmission mode, the single line achieves multi-functionality, replacing what traditionally required separate dedicated cables.
2Power
If cyclic power transmission is used, then power transmission capability is improved, but energy efficiency deteriorates due to buffering requirements
Solution Approach 1:
The system employs periodic alternating phases where the communication line switches between power transmission mode and data transmission mode. During power phases, voltage is applied to deliver power; during data phases, the line is discharged for communication. This periodic action enables high power transmission capability while avoiding continuous energy loss by allowing complete discharge between power pulses.
Solution Approach 2:
The system deliberately discards stored energy in the line by discharging it completely during data transmission phases. This prevents energy loss from gradual leakage or inefficient buffering, as the line is reset to a known low-energy state between power transmission cycles, improving overall energy efficiency.
3Device complexity
If fixed time intervals are used for power and data transmission, then system simplicity is improved, but adaptability deteriorates
Solution Approach 1:
The system implements a dynamic interface that can adaptively adjust the timing and duration of power phases and data phases based on the actual needs of connected bus users. Rather than fixed intervals, the controller can extend or shorten phases dynamically, allowing the system to accommodate varying power requirements and data transmission rates of different devices on the bus.
4Device complexity
If only two lines are used for both power and data, then device complexity is reduced, but power transmission capability is limited
Solution Approach 1:
By using periodic power phases with sufficiently high voltage and current during the power transmission intervals, the system can deliver substantial power through the two-line interface. The alternating discharge ensures that the line is ready to accept high power pulses, enabling power transmission capability that exceeds what would be possible with continuous low-power operation.
Data Source
AI summary
A method for supplying at least one bus user via a control unit, in which data are transmitted to at least one bus user during at least one phase for data transmission and power is transmitted during at least one phase for power transmission, the at least one phase for data transmission and the at least one phase for power transmission being provided alternately, and the lengths of the phases for data transmission and/or the lengths of the phases for power transmission being set variably.