Welding-Voltage Feedback for Stable Auxiliary Power Output
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Solution Overview
Problem
Conventional engine-driven power systems face challenges in maintaining constant auxiliary power output voltage as the load increases, requiring additional board space and connections for voltage isolation, which complicates power regulation.
Innovation Solution
The system regulates auxiliary power output voltage using feedback from the welding output voltage, controlling the generator or engine to adjust the non-welding power voltage based on welding-type power measurements, and includes overvoltage protection circuits to disconnect power when thresholds are exceeded, thereby reducing the need for high voltage isolation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional voltage feedback regulation is used for auxiliary power, then voltage stability can be maintained, but additional board space and connections for voltage isolation are required
Solution Approach 1:
The welding output voltage serves dual purposes: it provides welding power and simultaneously functions as the feedback signal for regulating auxiliary power output voltage. The control circuit monitors the welding output voltage to infer generator internal state, eliminating the need for separate auxiliary voltage sensing circuits and reducing board space requirements.
Solution Approach 2:
The welding output voltage acts as an intermediary parameter that indirectly reflects the generator's internal electromagnetic state and auxiliary power voltage level. By regulating based on welding voltage measurements, the system avoids direct high-voltage isolation requirements while maintaining effective voltage control.
2Power
If auxiliary power load is increased, then power output capability is improved, but auxiliary power output voltage decreases
Solution Approach 1:
The control circuit continuously monitors the welding output voltage and uses this feedback to dynamically adjust the generator's field current or engine speed. When auxiliary power load increases causing voltage droop, the feedback mechanism detects the change in welding voltage and compensates by increasing generator excitation or engine power output, maintaining stable auxiliary voltage under varying load conditions.
Solution Approach 2:
The system transitions from static voltage regulation to dynamic regulation by continuously adapting generator operating parameters based on real-time welding voltage measurements. This allows the system to maintain voltage stability across a wide range of auxiliary power loads by dynamically adjusting field current or engine speed in response to load changes.
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 effectively maintains stable auxiliary power output voltage without the need for high voltage isolation, reducing complexity and space requirements while preventing overvoltage conditions, thus improving power system efficiency and safety.
Implementation Method 1
a generator to provide electrical power based on mechanical power received from the engine
Data Source
AI summary
Systems and methods to control auxiliary power output voltage using a welding output voltage are disclosed. An example power system includes an engine, a generator to provide electrical power based on mechanical power received from the engine, the electrical power comprising welding-type power and non-welding power, and a controller to control the generator or the engine to increase or decrease a voltage of the non-welding power based on a voltage measurement of the welding-type power.