Resonant Switched Capacitor Converter for Flexible Voltage Gain

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Solution Overview

Problem

Conventional resonant switched capacitor direct-current conversion circuits can only achieve specific output voltage gains by changing the hardware circuit topology, limiting their applicability and flexibility.

Innovation Solution

A resonant switched capacitor converter with a control module, first and second capacitors connected in series, and multiple resonant modules, where switches in each resonant module are controlled to be turned on or off based on a target output voltage gain, allowing for flexible adjustment of output voltage without altering the hardware circuit topology.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the quantity of resonant cavities is increased or reduced to change output voltage gain, then the output voltage gain can be adjusted, but the hardware circuit topology must be changed which reduces applicability

Engineering Contradiction:

Improveoutput voltage gain adjustmentVSAvoidhardware circuit topology change

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies dynamics by making the circuit topology reconfigurable through switch devices. The resonant switched capacitor converter uses switchable capacitor connections that can be dynamically adjusted between series and parallel configurations, allowing the output voltage gain to be changed without physically altering the hardware structure. This dynamic reconfiguration resolves the contradiction by enabling adaptability while maintaining a fixed hardware topology.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the electrical parameters (connection states of capacitors and switches) rather than physical parameters (quantity of resonant cavities). By controlling the switching states of semiconductor devices, the effective capacitance ratios change, which directly adjusts the output voltage gain. This parameter-based approach allows flexible voltage gain adjustment without modifying the hardware circuit topology.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the hardware circuit topology is changed to achieve different output voltage gains, then the voltage conversion ratio can be adjusted, but the applicability and flexibility are reduced

Engineering Contradiction:

Improvevoltage conversion ratioVSAvoidapplicability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent creates a universal circuit topology that can perform multiple voltage conversion ratios using the same hardware structure. The resonant switched capacitor converter is designed with switchable capacitor banks that can be configured in different combinations, allowing a single circuit to achieve multiple output voltage gains (e.g., 1:1, 2:1, 3:1, 4:1) without requiring separate dedicated circuits for each ratio. This multi-functionality enhances both adaptability and ease of operation.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Device complexity

If a fixed hardware circuit topology is used, then the structure is simple, but the output voltage gain cannot be flexibly adjusted

Engineering Contradiction:

Improvehardware circuit topologyVSAvoidoutput voltage gain control

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent replaces mechanical/physical reconfiguration (adding or removing resonant cavities) with electronic control (switching devices). Instead of mechanically altering the circuit by changing the number of resonant cavities, the invention uses electronically controlled switch devices to reconfigure the capacitor connections. This substitution maintains a fixed hardware topology while enabling flexible output voltage gain adjustment through electronic control signals.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This approach enables flexible control of different output voltage gains, enhancing the applicability and flexibility of the resonant switched capacitor converter without requiring changes to the hardware circuit topology.

Implementation Method 1

The switch device is periodically turned on or turned off to cause resonance to the energy storage element, to implement a direct-current conversion function with a specific output voltage gain

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentUS20240079957A1Resonant Switched Capacitor Converter and Power Supply System

Publication Date: 2024.03.07 HUAWEI DIGITAL POWER TECH CO LTD

AI summary

A resonant switched capacitor converter includes a control system, a first capacitor, a plurality of resonant systems, and a plurality of second capacitors coupled in series. The first capacitor is coupled in series to the second capacitors. One resonant system corresponds to one second capacitor. Each of the resonant systems includes a first switch system, a resonant circuit, and a second switch system. The control system is coupled to the resonant systems and configured to control, based on a target output voltage gain, switches in the first switch system and the second switch system in each resonant system to be turned on or turned off, to enable the resonant switched capacitor converter to obtain an output voltage gain equal to the target output voltage gain.