Adaptive Voltage Gain Control for Ripple and Load Transients
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Solution Overview
Problem
Traditional power supply systems face challenges in maintaining stable output voltage with significant ripples during light loading and insufficient transient response during heavy loading due to fixed gain values, which fail to meet customer specifications.
Innovation Solution
A voltage control method that dynamically adjusts the gain value by calculating a buffer gain value through weight calculation of the present and target gain values, and generates a priority command for high gain when heavy loading is detected, allowing for adaptive voltage control and improved transient response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a larger gain value is used to maintain efficiency with heavy loading, then the transient response speed is improved, but significant ripples appear in the low output voltage during light loading
Solution Approach 1:
The patent implements dynamic gain adjustment by transitioning from a fixed gain value to a variable gain value that changes based on operating conditions. The control method calculates a target gain value based on the present duty ratio and uses a buffer gain value (through weight calculation) to smoothly transition between gain values, enabling the system to adapt to different load conditions and resolve the contradiction between transient response speed and output voltage stability.
Solution Approach 2:
The patent changes the gain parameter dynamically based on the duty ratio and load conditions. By calculating a target gain value from the present duty ratio and using weighted averaging to generate a buffer gain value, the system adjusts the gain parameter to optimize both transient response and output stability under varying operating conditions.
2Stability of the object's composition
If a smaller gain value is used to reduce ripples during light loading, then the output voltage stability is improved, but the transient response becomes insufficient when heavy loading is suddenly applied
Solution Approach 1:
The system dynamically adjusts the gain value based on real-time operating conditions. When heavy loading is detected, the gain value increases to improve transient response; when light loading occurs, the gain value decreases to reduce ripples and improve stability. This dynamic adaptation resolves the contradiction between stability and transient response capability.
Solution Approach 2:
The gain parameter is changed dynamically based on duty ratio and load detection. The control method calculates target gain values based on present duty ratios and uses buffer gain values to smoothly transition between different gain levels, enabling the system to optimize both stability and transient response according to actual operating conditions.
3Device complexity
If a fixed gain value is used in traditional power supply systems, then the system complexity is reduced, but the system cannot adapt to different load types and fails to meet customer specifications
Solution Approach 1:
The patent transforms the static control system into a dynamic one by implementing gain value adjustment based on duty ratio and load conditions. The control method calculates target gain values and uses buffer gain values for smooth transitions, enabling the system to adapt to different load types while maintaining manageable complexity through a systematic adjustment mechanism.
Solution Approach 2:
The system changes the gain parameter dynamically based on operating conditions such as duty ratio and inductive current changes. This parameter adaptation enables the system to meet diverse customer specifications for different load types while maintaining a relatively simple control structure through algorithmic adjustment rather than hardware complexity.
Data Source
AI summary
The present invention provides a voltage control method for controlling a power supply. The voltage control method comprises the following steps: obtaining a present output voltage value associated with a present gain value; obtaining a predetermined output voltage value associated with a predetermined duty ratio; calculating a target gain value, corresponding to the predetermined duty ratio, according to a gain value formula; performing a weight calculation on the present gain value and the target gain value for generating a buffer gain value; and setting an output voltage command according to the buffer gain value. Wherein the buffer gain value is between the present gain value and the target gain value.