Converter with Series Coupled Inductors for Efficiency and Transient Response
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Solution Overview
Problem
Conventional converters face a tradeoff between high power efficiency and fast transient response, as larger inductance values improve efficiency but increase resistance, leading to slower transient responses, while smaller inductance values enhance transient response but reduce efficiency, especially under varying loading conditions.
Innovation Solution
The implementation of multiple power channels with different inductance values and drive circuits, where one channel prioritizes efficiency (efficient power channel) and another prioritizes transient response (fast power channel), sharing inductors and operating based on loading conditions to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If larger inductance values are used, then power efficiency is improved, but transient response becomes slower
Solution Approach 1:
The patent divides the single power channel into multiple power channels (first power channel with larger inductor L1 for efficiency, second power channel with smaller inductor L2 for fast transient response). Each channel is segmented to handle different operating conditions, resolving the contradiction between efficiency and transient response speed.
Solution Approach 2:
The patent dynamically switches between different power channels based on operating conditions. The controller enables the first power channel during steady-state light loading for high efficiency, and enables the second power channel during transient events or heavy loading for fast response. This dynamic adaptation resolves the static contradiction between efficiency and speed.
2Speed
If smaller inductance values are used, then transient response is enhanced, but power efficiency is reduced
Solution Approach 1:
The patent creates a second power channel with a smaller inductor L2 specifically optimized for fast transient response. This segmented approach allows the smaller inductor to be used only when needed for transient events, rather than continuously sacrificing efficiency.
Solution Approach 2:
The controller dynamically enables the second power channel with smaller inductor only during transient events or heavy loading conditions, and keeps it disabled during steady-state light loading. This dynamic control ensures transient response enhancement only when necessary, maintaining high efficiency during normal operation.
3Speed
If multiple power channels with different inductance values are implemented, then both efficiency and transient response are optimized, but device complexity increases
Solution Approach 1:
The patent merges multiple power channels that share common components (input voltage source, output capacitor, controller) while having different inductor values. This combining approach achieves multiple performance benefits without proportionally increasing complexity, as the shared components are used by both channels.
Solution Approach 2:
The controller is designed with multi-functionality to manage both power channels, determining loading conditions and selectively enabling appropriate channels. This universal controller handles both efficiency optimization and transient response management, reducing the need for separate control systems for each channel.
Data Source
AI summary
A converter is provided. The converter is capable of generating a loading current at an output node. The converter includes a high efficiency power channel and a fast transient response channel. The high efficiency power channel and the fast transient response channel share an inductor that is coupled to the output node. The high efficiency power channel has an additional inductor that is connected in series with the inductor coupled to the output node.