Bus Loop Power Interface Voltage Control
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Solution Overview
Problem
Existing bus loop power interfaces face inefficiencies due to fixed voltage parameters and high impedance, leading to poor power transfer and voltage dips when loop current increases, and switch mode power supplies are not compatible with high impedance bus loops used in industrial settings.
Innovation Solution
A bus loop power interface that incorporates a voltage control module and an impedance control module with feedback, utilizing a switch mode power supply (SMPS) and a current measuring resistor, op-amp, and transistor to maintain a predetermined supply voltage and current, while regulating impedance and maximizing power transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If linear voltage regulation is used in bus loop power interface, then voltage stability is maintained, but power transfer efficiency deteriorates due to fixed voltage parameter
Solution Approach 1:
The patent implements dynamic voltage control by transitioning from fixed linear regulation to a controllable voltage source that adjusts output voltage based on load conditions. The voltage control module dynamically modifies the voltage parameter to optimize power transfer efficiency while maintaining stability when needed, resolving the contradiction between fixed voltage stability and efficient power transfer.
2Power
If loop current increases to deliver more power, then power delivery improves, but voltage dips due to high loop impedance
Solution Approach 1:
The patent employs feedback control mechanisms where the voltage control module continuously monitors output voltage and load conditions, then adjusts the voltage parameter accordingly. This feedback loop prevents voltage dips by compensating for the voltage drop caused by high loop impedance when current increases, thereby maintaining voltage stability while enabling improved power delivery.
Solution Approach 2:
The patent changes the voltage parameter dynamically based on operating conditions. Instead of using a fixed voltage, the system adjusts the voltage level to compensate for impedance effects, allowing the voltage to change in response to current variations and thereby preventing voltage dips while maintaining stable power delivery.
3Loss of energy
If switch mode power supply is used to increase voltage for better power transfer, then power transfer efficiency improves, but input impedance becomes low which is incompatible with high impedance bus loop
Solution Approach 1:
The patent applies local quality by implementing impedance control specifically at the bus loop interface while using SMPS internally for efficient power conversion. The system maintains high input impedance at the critical interface point for compatibility, while utilizing SMPS technology in the power conversion stage to achieve efficient power transfer, thus resolving the contradiction between power efficiency and impedance compatibility.
4Device complexity
If linear voltage regulation with series regulator is used, then voltage control is simple, but power transfer efficiency is poor due to fixed voltage parameter
Solution Approach 1:
The patent transitions from static linear regulation to dynamic voltage control. The voltage control module implements dynamic adjustment of the voltage parameter based on real-time operating conditions, enabling efficient power transfer while maintaining manageable system complexity through integrated control architecture.
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
The solution effectively maximizes electrical power delivery while maintaining high impedance, ensuring stable supply voltage and current, even under varying conditions, thus enhancing communication and power transfer efficiency in industrial bus loops.
Implementation Method 1
A SMPS generates a time varying signal from the DC bus voltage, performs a voltage step-up conversion, and converts the resulting time-varying signal back to a DC voltage that can have a higher voltage level than the original DC bus voltage
Implementation Method 2
a feedback coupled between the voltage control module and the impedance control module. The feedback provides a feedback signal to the voltage control module that enables the voltage control module to substantially maintain the predetermined supply voltage
Data Source
AI summary
A bus loop power interface (100) is provided according to the invention. The bus loop power interface (100) comprises a voltage control module (110) receiving a loop voltage VLOOP and generating a predetermined supply voltage VSUPPLY, an impedance control module (120) coupled to the voltage control module (110), with the impedance control module (120) receiving a loop current ILOOP and generating a predetermined supply current ISUPPLY, and a feedback (115) coupled between the voltage control module (110) and the impedance control module (120). The feedback (115) provides a feedback signal to the voltage control module (110) that enables the voltage control module (110) to substantially maintain the predetermined supply voltage VSUPPLY.