SIMO Converter Dual Rest State Controller
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Solution Overview
Problem
Single-input multiple-output (SIMO) DC-DC converters often experience low efficiency and output oscillations due to component limitations and control issues, particularly when operating with different DC voltages in modern electronic systems.
Innovation Solution
A SIMO converter topology with a controller that switches between dual rest states, allowing for inductor charge mode, positive and negative boost modes, and specific rest states to improve efficiency and reduce artifacts in supply outputs, using switches to manage the inductor's operation and transition between these states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single rest state is used in SIMO converter operation, then the control structure is simple, but efficiency is reduced and output oscillations occur
Solution Approach 1:
The controller dynamically switches between multiple rest states (first rest state with first switch closed, second rest state with fourth switch closed) based on operating conditions, transforming the static single rest state into a dynamic multi-state system that adapts to different load and voltage conditions to maximize efficiency
Solution Approach 2:
The invention changes the operational parameters by introducing multiple rest states with different switch configurations, allowing the converter to adjust its operating point and minimize losses under varying conditions, thereby resolving the efficiency-complexity contradiction
2Stability of the object's composition
If a single rest state is used in SIMO converter operation, then the control structure is simple, but output oscillations and artifacts are generated
Solution Approach 1:
The controller employs dynamic switching between first and second rest states to counteract oscillations, where the timing and selection of rest states are adjusted based on detected output conditions, providing active stabilization that reduces artifacts and improves output stability
Solution Approach 2:
The controller uses feedback from the converter operation to determine when to switch between rest states, creating a closed-loop control system that detects output oscillations and adjusts rest state timing accordingly to suppress artifacts and maintain stable output
3Productivity
If dual rest states are implemented, then efficiency and output stability are improved, but control complexity increases
Solution Approach 1:
The control function is segmented into distinct rest state modes (first rest state with specific switch configuration, second rest state with different configuration), allowing the controller to select appropriate segments based on operating conditions, managing complexity through functional decomposition
Data Source
AI summary
An inductor has first and second terminals. A first switch is coupled between the first terminal and a voltage supply terminal. A second switch is coupled between the first terminal and a negative output supply terminal. A third switch is coupled between the second terminal and a positive output supply terminal. A fourth switch is coupled between the second terminal and a ground terminal. A controller is coupled to the first, second, third and fourth switches. The controller is configured to provide: an inductor charge mode; a positive boost mode; a negative boost mode; a first rest state in which the controller closes the first switch and opens the second, third and fourth switches; and a second rest state in which the controller closes the fourth switch and opens the first, second and third switches.