Bus Voltage Regulation via Dynamic Current Adjustment
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Solution Overview
Problem
Existing bus system power supply methods, such as those described in DE 101 47 924 A1, face challenges in regulating current strength to prevent interference with data transmission and efficiently manage voltage drops during data transmission and load changes, leading to inefficiencies and potential misinterpretation of voltage changes as signals.
Innovation Solution
A method that continuously adjusts the change in current strength over time based on control parameters, including the difference between bus device voltage and input bus voltage, to ensure stable voltage regulation and adapt to changing operating conditions, using either predefined mathematical functions or stored characteristic curves to determine the optimal change in current intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current strength is increased rapidly to compensate for voltage drops during data transmission, then the voltage stability is improved, but data transmission is adversely affected due to large current changes being misinterpreted as signals
Solution Approach 1:
The patent implements dynamic control of the current source by continuously monitoring the bus device voltage and adjusting the current strength accordingly. The control unit increases current only when voltage drops below a threshold, and reduces current when voltage stabilizes, creating a responsive yet controlled dynamic system that adapts to real-time conditions without causing harmful fluctuations.
Solution Approach 2:
The patent employs a feedback mechanism where the control unit continuously monitors the bus device voltage and uses this information to adjust the current source output. The feedback loop compares the actual voltage with reference values and modifies the current strength to maintain voltage within acceptable ranges, preventing both voltage collapse and excessive current changes that could interfere with data transmission.
2Reliability
If the current strength is increased continuously during long data transmission periods, then the voltage is maintained, but energy consumption increases and the average current should equal the pre-transmission current
Solution Approach 1:
The patent implements periodic adjustment of the current source based on voltage monitoring cycles. Instead of continuous current increase, the system periodically checks the bus device voltage and only adjusts current when necessary. This periodic action maintains voltage stability during data transmission while minimizing energy consumption by keeping the current at baseline levels when voltage is adequate.
Solution Approach 2:
The patent changes the current strength parameter dynamically based on voltage conditions rather than maintaining a constant elevated current. The control unit adjusts the current parameter only when voltage drops below a threshold, and reduces it back to the original level when voltage stabilizes, optimizing the balance between voltage maintenance and energy consumption.
3Object-affected harmful factors
If switch 26 is used to bypass current during data transmission, then data transmission is protected, but the capacitor may discharge during the switching period and requires recharging
Solution Approach 1:
The patent extracts the capacitor switching mechanism from the control system and replaces it with direct current source control. By removing the capacitor C and switch 26 from the circuit, the system eliminates the discharge-recharge cycle and associated timing losses, while maintaining the ability to protect data transmission through controlled current adjustment from the current source 24.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise and adaptive regulation of bus device voltage, preventing voltage drops during data transmission and load changes, while ensuring minimal disruption to data signals and rapid response to voltage fluctuations, thus enhancing the efficiency and reliability of the bus system.
Implementation Method 1
Another node 28 , which is at a reference potential (ground), is coupled via a capacitor C to node 28
Implementation Method 2
Current I BUS is converted by current source 24 to current I SP
Data Source
Figure 1~2
Figure 3~4
AI summary
The method involves feeding bus voltage to an input over a communication bus. A rule is set based on variations of bus device voltage from a reference value. Variation of current intensity of current (Isp) supplied by a current source during preset regulation time intervals is continuously adjusted depending on a regulation parameter. Time interval is continuously increased with duration of time unit. The variation of current intensity is continuously adjusted depending on the current intensity of current flowing over voltage connections. An independent claim is also included for a ballast device for providing bus device voltage for a bus device.