Self-Adjusting Set-Point Control for Power Converters
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Solution Overview
Problem
Power conversion systems face inefficiencies and increased power loss due to the inability to effectively regulate output voltage across varying input voltage ranges, leading to suboptimal performance in distributing power to multiple loads.
Innovation Solution
A power conversion system with a self-adjusting set-point control scheme that automatically adjusts the output voltage regulation based on input voltage, allowing the converter to operate at a high duty cycle while maintaining active regulation, reducing output ripple and RMS current, and optimizing inductor design for efficient power distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional fixed set-point control is used, then the converter can maintain stable output voltage, but it operates inefficiently with increased power loss and cannot adapt to varying input voltage ranges
Solution Approach 1:
The patent implements a dynamic set-point control mechanism where the output voltage set-point automatically adjusts in response to varying input voltage conditions. The controller modifies the set-point value based on real-time input voltage sensing, enabling the converter to adapt its operating parameters dynamically rather than maintaining a fixed set-point, thereby optimizing efficiency across different input voltage ranges.
Solution Approach 2:
The invention changes the control parameter from a fixed set-point to a variable set-point that is a function of input voltage. By establishing a relationship between input voltage levels and corresponding optimal set-point values, the system transforms the static parameter into a dynamic one, allowing the converter to operate at optimal efficiency points across the entire input voltage range.
2Loss of energy
If the converter operates at high duty cycle to improve efficiency, then power loss is reduced, but output voltage regulation becomes difficult to maintain
Solution Approach 1:
The patent incorporates a feedback control mechanism where the actual output voltage is continuously monitored and compared against the dynamically adjusted set-point. The controller uses this feedback information to make real-time adjustments to the duty cycle, ensuring that output voltage regulation precision is maintained even when operating at high duty cycles that improve efficiency.
Solution Approach 2:
The system performs self-adjustment by automatically modifying its own set-point and duty cycle based on sensed operating conditions. The controller independently regulates the output voltage by adjusting the duty cycle in response to load and input voltage variations, enabling the converter to maintain precise regulation while operating efficiently at high duty cycles without external intervention.
3Productivity
If fixed output voltage regulation is applied, then load regulation is simplified, but the system cannot optimize performance across different input voltage ranges and multiple loads
Solution Approach 1:
The patent creates a universal control scheme that can handle multiple input voltage ranges and various load conditions through a single adaptive mechanism. The dynamic set-point control serves multiple functions: it optimizes efficiency across different input voltages, maintains regulation under varying load conditions, and enables the converter to serve multiple purposes without requiring separate control circuits for each operating mode.
Data Source
AI summary
A power conversion system includes a power converter that converts an input voltage into a DC output voltage. Additionally, the power conversion system also includes a controller that provides a self-adjusting set-point control scheme for the power converter. A method of power conversion system operation is also provided.