Two-Wire Transmitter With Input-Tracking Shunt Regulation
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Solution Overview
Problem
Existing two-wire transmitters fail to effectively utilize power from an external circuit due to a constant circuit voltage that does not adjust with fluctuations in input voltage, resulting in inefficient power utilization.
Innovation Solution
A two-wire transmitter design incorporating a constant current circuit and a shunt regulator circuit that controls the circuit voltage to increase with increasing input voltage, ensuring efficient power use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the circuit voltage is kept constant in a two-wire transmitter, then the circuit operation is stable, but the power from the external circuit cannot be effectively used
Solution Approach 1:
The patent applies the dynamics principle by transitioning from a constant voltage regulation approach to a dynamic voltage tracking approach. The shunt regulator circuit continuously adjusts the circuit voltage to match the input voltage level, allowing the system to adapt to varying input conditions and maximize power utilization while maintaining operational stability through controlled adjustment.
Solution Approach 2:
The patent implements parameter changes by modifying the circuit voltage parameter from a fixed constant value to a variable value that changes in response to input voltage fluctuations. This parameter change enables the system to effectively utilize varying power levels from the external circuit while the shunt regulator ensures the changes occur in a controlled manner that maintains circuit stability.
2Use of energy by moving object
If the circuit voltage increases with input voltage, then power utilization efficiency improves, but circuit control complexity increases
Solution Approach 1:
The patent applies the self-service principle by designing a shunt regulator circuit that automatically tracks and adjusts the circuit voltage based on input voltage levels without requiring external intervention or complex control systems. The circuit self-regulates by using the input voltage itself as the reference for adjustment, simplifying the control architecture while achieving effective power utilization.
Data Source
AI summary
There is provided a two-wire transmitter that is connected to an external circuit via two transmission lines and that operates by using an input voltage and a current signal supplied from the external circuit, the two-wire transmitter including: a constant current circuit that controls the current signal in accordance with a detection result from a sensor; and a shunt regulator circuit that controls a circuit voltage in accordance with the input voltage, in which the shunt regulator circuit controls the circuit voltage such that the circuit voltage increases as the input voltage increases.