Generator Voltage Regulator With Dynamic V/F Curve Selection
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Solution Overview
Problem
Electric machines, such as generators, face challenges in maintaining desired speed and output voltage when operating under varying load resistance, as the torque provided by the prime mover can decrease with increased load, leading to engine speed reduction.
Innovation Solution
A voltage regulator with a dynamic frequency-to-voltage ratio control system that adjusts the field current and voltage based on real-time resistance and voltage data, using a controller to select appropriate voltage-frequency curves to maintain target voltage and speed by modifying the load resistance and applied voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the load resistance increases, then the power output increases, but the engine speed decreases
Solution Approach 1:
The patent implements dynamic adjustment of the voltage regulator's frequency-to-voltage ratio based on real-time operating conditions. The controller modifies the target frequency setpoint dynamically in response to detected engine speed and load conditions, allowing the system to adapt to varying power demands while maintaining stable engine operation across different load scenarios
Solution Approach 2:
The system continuously monitors engine speed and power output, using this feedback to adjust the voltage regulator's frequency-to-voltage ratio. The controller detects deviations from desired operating parameters and modifies the frequency setpoint accordingly, creating a closed-loop control system that balances power output requirements with engine speed maintenance
2Adaptability or versatility
If the load resistance varies, then the adaptability to different loads improves, but the stability of output voltage deteriorates
Solution Approach 1:
The voltage regulator dynamically adjusts its frequency-to-voltage ratio based on detected load conditions. The controller modifies the target frequency setpoint in real-time according to the actual load resistance, enabling the system to maintain stable voltage output across varying load scenarios by adapting the control parameters to match current operating conditions
Solution Approach 2:
The system changes the frequency-to-voltage ratio parameter dynamically in response to load variations. By adjusting this critical control parameter based on real-time load detection, the system maintains optimal voltage regulation performance across different operating conditions, preventing voltage instability that would occur with fixed ratio settings
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
Effectively stabilizes engine speed and output voltage by dynamically adjusting the voltage and frequency in response to changing load conditions, ensuring consistent performance across varying loads.
Implementation Method 1
An electric machine may be an electromagnetic rotating machine that includes a rotor and a stator. The rotor and stator are positioned on opposite sides of an air gap through which a magnetic field is present and magnetic flux flows between the rotor and the stator.
Data Source
AI summary
A voltage regulator for a generator having a dynamic voltage-to-frequency (V/F) ratio includes a memory, a voltage calculator, and a selection module. The memory is configured to store a plurality of voltage-frequency curves for the generator. The voltage calculator is configured to receive data indicative of an output of the generator and configured to determine a resistance value from the output of the generator and a voltage value from the output of the generator. The selection module configured to select a voltage-frequency curve from the plurality of voltage-frequency curves in response to the resistance value and configured to select a voltage-frequency ratio from the selected voltage-frequency curve in response to the voltage value. An output adjustment for the generator is determined in response to the selected voltage-frequency ratio.