Adaptive Controller for Power Converter Efficiency
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Solution Overview
Problem
Existing power converter controllers fail to adaptively improve efficiency in response to measured parameters after manufacturing or environmental conditions, and do not consider system operational states, leading to suboptimal performance and efficiency.
Innovation Solution
A power system with an adaptive controller that receives signals indicating system operational states and adjusts power converter operational states to optimize efficiency by controlling duty cycles and internal characteristics based on measured parameters and external signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power converter operates at fixed duty cycle to maintain simplicity, then device complexity is reduced, but power conversion efficiency deteriorates under varying load conditions
Solution Approach 1:
The controller dynamically adjusts the duty cycle of power switches based on real-time measurements of operating characteristics (such as inductor current, capacitor voltage, or power stage parameters). This dynamic adaptation allows the power converter to maintain optimal efficiency across varying load conditions while using a relatively simple controller architecture that implements adaptive control algorithms.
Solution Approach 2:
The controller incorporates feedback mechanisms that continuously monitor internal operating characteristics of the power converter and use this information to adjust the duty cycle. By measuring parameters such as inductor current, capacitor voltage, or other power stage characteristics and feeding this information back to the control logic, the system automatically optimizes efficiency without requiring complex external control systems.
2Loss of energy
If the controller dynamically adjusts duty cycle to improve efficiency, then power conversion efficiency is improved, but device complexity increases
Solution Approach 1:
The power converter controller performs self-adjustment by automatically measuring its own internal operating characteristics and using this self-diagnosed information to optimize its duty cycle. The controller monitors parameters such as inductor current, capacitor voltage, or power stage characteristics that are inherently available within the power converter circuitry, eliminating the need for external sensors or complex measurement systems.
Solution Approach 2:
The controller changes operational parameters (duty cycle, switching frequency) based on measured operating characteristics to optimize efficiency. By dynamically adjusting these parameters in response to real-time measurements of power stage conditions, the controller achieves adaptive efficiency optimization using relatively simple control logic that processes basic electrical parameters.
3Loss of energy
If the power converter is designed for high efficiency at specific operating points, then efficiency at those points is improved, but adaptability to varying load conditions deteriorates
Solution Approach 1:
The controller implements dynamic duty cycle adjustment that adapts to varying load conditions in real-time. By continuously monitoring operating characteristics such as inductor current and capacitor voltage, the controller automatically modifies the duty cycle to maintain optimal efficiency whether the load is light, heavy, or varying, thus achieving both high efficiency and broad adaptability.
Solution Approach 2:
The controller is pre-configured with control algorithms and measurement capabilities that enable it to anticipate and respond to load variations. By having the measurement and control logic built into the controller design from the outset, the system is prepared to adapt to any load condition without requiring additional hardware or complex reconfiguration.
Data Source
AI summary
A power system having a power converter with an adaptive controller. The power system is coupled to a load and includes a power system controller that receives a signal indicating a system operational state of the load and selects a power converter operational state as a function thereof. The power system also includes a power converter with a power switch that conducts for a duty cycle to provide a regulated output characteristic at an output thereof. The power converter also includes a controller that receives a command from the power system controller to enter the power converter operational state and provides a signal to control the duty cycle of the power switch as a function of the output characteristic and in accordance with the command, thereby regulating an internal operating characteristic of the power converter to improve an operating efficiency thereof as a function of the system operational state.