Resonant DC-to-DC Power Transformation System
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Solution Overview
Problem
Current technologies face inefficiencies and high costs in high voltage dc-to-dc voltage conversion, as they often require ac intermediates and are not well-suited for high power applications, limiting their ability to efficiently transform and regulate power between high voltage dc systems.
Innovation Solution
A multi-module dc-to-dc power transformation system using resonant switching between capacitors and a reactor, allowing energy interchange oscillatory and interruption at current zero, enabling efficient transformation between high and low dc voltage levels without ac intermediates, and capable of operating at high voltage ratings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If ac intermediates are used for dc-to-dc voltage conversion, then voltage transformation can be achieved, but system complexity and energy losses increase
Solution Approach 1:
The invention extracts and eliminates the AC intermediate stage from the traditional DC-AC-DC conversion path, creating a direct DC-to-DC transformation system. By removing the AC conversion环节, the system reduces complexity while maintaining voltage transformation capability through resonant capacitor discharge mechanisms.
Solution Approach 2:
The invention substitutes magnetic transformer-based voltage transformation with a capacitor-based resonant discharge system. This replacement eliminates the need for magnetic cores and windings, reducing device complexity and enabling direct DC-to-DC transformation without AC intermediates.
2Power
If traditional dc-to-dc conversion methods are used, then voltage transformation can be achieved, but energy losses increase
Solution Approach 1:
The invention employs periodic resonant discharge of capacitors to transfer energy between DC voltage levels. By utilizing oscillatory discharge cycles at resonant frequencies, the system achieves efficient energy transfer with minimal losses, replacing continuous magnetic transformation with periodic capacitor-based energy exchange.
Solution Approach 2:
The invention changes the operating parameters from continuous magnetic field transformation to periodic electric field discharge. By controlling capacitor charge and discharge cycles, the system optimizes energy transfer efficiency and reduces losses associated with traditional magnetic transformer operation.
3Ease of manufacture
If electronic-level dc-to-dc conversion technology is adapted to high voltage power applications, then circuit integration is improved, but insulation requirements and practical implementation become problematic
Solution Approach 1:
The invention segments the high voltage DC-to-DC transformation into multiple lower-voltage capacitor stages. By dividing the voltage transformation into discrete capacitor charge-discharge cycles, the system maintains circuit integration benefits while reducing insulation requirements for individual components.
Solution Approach 2:
The invention introduces capacitors as intermediary energy storage elements between DC voltage levels. These capacitors serve as mediators that enable voltage transformation without requiring direct high-voltage insulation, as each capacitor operates at manageable voltage levels during charge and discharge cycles.
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 solution achieves efficient and economical dc-to-dc transformation, comparable to existing ac-to-ac magnetic and switched capacitor transformations, facilitating power regulation and transformation in high voltage dc grids and distribution systems, while reducing costs and energy losses.
Implementation Method 1
resonant switching between capacitors and a reactor, allowing energy interchange oscillatory and interruption at current zero
Data Source
AI summary
A transformation system capable of efficiently transforming electrical power from one dc voltage to one or more other dc voltages or of regulating power flow within a network of constant nominal voltage; in each case without intermediate magnetic transformation. The transformation system is based on periodic and resonant delivery of charge from the first of two dc nodes to a system of capacitors, electrical reconfiguration of those capacitors, then delivery of power to one or more other dc nodes.