Two-Switch Boosting Switched-Capacitor Converter
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Solution Overview
Problem
Traditional switched-capacitor converters have low efficiency and high component count, which limits their effectiveness in applications requiring high energy density and reduced electromagnetic interference.
Innovation Solution
The development of a two-switch boosting switched-capacitor converter (TBSC) with interleaved operation and gain-extension networks, which reduces component count and minimizes voltage stress, allowing for efficient voltage gain and regulation through PWM control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional switched-capacitor converters are used, then voltage conversion is achieved, but component count is high and efficiency is low
Solution Approach 1:
The converter is divided into modular units (first and second switching units) that can be independently controlled and optimized. Each unit contains specific components (switches, capacitors) that perform dedicated functions, allowing the overall system to achieve high efficiency with reduced redundancy and lower component count.
2Object-affected harmful factors
If traditional switched-capacitor converters are used, then voltage conversion is achieved, but electromagnetic interference is high
Solution Approach 1:
The invention extracts and eliminates the inductor component from the traditional converter structure, replacing it with a capacitor-based switching mechanism. This removal of the inductor significantly reduces electromagnetic interference while maintaining the voltage conversion function through alternative capacitor switching topologies.
3Power
If inductor-based boosting converters are used, then high power conversion is achieved, but weight and size increase
Solution Approach 1:
The invention substitutes the mechanical/physical inductor component with an electrical capacitor-based switching system. Capacitors are inherently lighter and smaller than inductors for equivalent power handling, enabling high power conversion capability while significantly reducing converter weight and size.
4Power
If inductor-based boosting converters are used, then high power conversion is achieved, but cost increases
Solution Approach 1:
The invention replaces expensive inductor components with relatively cheaper capacitor and switch combinations. Capacitors and MOSFETs are generally more cost-effective and easier to manufacture than high-power inductors, reducing overall converter cost while maintaining high power conversion capability through efficient switching topologies.
Data Source
AI summary
Various examples are provided for two-switch switched-capacitor (SC) converters. In one example, a SC converter includes first and second switches connected in series, a first gain-extension network coupled to the first switch and a second gain-extension network coupled to the second switch, which can be operated to boost a voltage applied across the first and second switches. The gain-extension networks can include a diode and a capacitor. In another example, the gain-extension networks can include a switch and a capacitor, which can be operated to buck a voltage applied across the gain-extension networks. In another example, a SC converter includes first and second diodes connected in series, a first gain-extension network coupled to the first diode and a second gain-extension network coupled to the second diode. The gain-extension networks can include a switch and a capacitor, which can be operated to buck a voltage applied across the gain-extension networks.