Multi-Port DC-AC Power Conversion System with Resonant Engine

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Solution Overview

Problem

Existing power systems face inefficiencies and complexity when integrating multiple power sources, particularly when combining DC and AC sources, due to issues with isolation and power loss during conversion.

Innovation Solution

A multi-port DC-AC power conversion system utilizing a resonant engine with controllable switches and inverters, allowing for efficient conversion of DC power from multiple sources to isolated AC power, with features like multiplexers and bi-matrix switches for flexible power management and energy recuperation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple DC power sources are integrated into a power system, then power versatility and system capability are improved, but device complexity and isolation requirements increase

Engineering Contradiction:

Improvepower source integration capabilityVSAvoidsystem complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The matrix switch configuration enables a single power conversion system to handle multiple DC power sources and multiple AC loads simultaneously. The controllable switches create a universal interface that can route power from any DC source to any AC load, eliminating the need for separate conversion systems for each power source and reducing overall system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The power conversion system acts as an intermediary between multiple DC power sources and AC loads. The controllable switches and resonant circuit mediate the power flow, providing isolation and conversion functionality in a centralized manner rather than requiring direct connections between each power source and load.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple DC power sources are converted to AC power, then power flexibility is improved, but power loss during conversion increases

Engineering Contradiction:

ImproveDC to AC conversion capabilityVSAvoidpower loss

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The resonant circuit operates at its resonant frequency, creating periodic oscillating current that enables efficient power transfer. By timing the switch operations to coincide with the resonant cycles, the system minimizes resistive losses and achieves soft switching conditions that reduce conversion losses.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system changes the operating parameters of the switches and resonant circuit to optimize efficiency. By adjusting switching frequencies and duty cycles to match resonant conditions, the system minimizes power loss during the DC to AC conversion process while maintaining the ability to handle multiple power sources.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If isolation is implemented during power conversion, then system reliability is improved, but conversion efficiency decreases

Engineering Contradiction:

Improveisolation capabilityVSAvoidconversion loss

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The system replaces traditional mechanical or transformer-based isolation methods with electronically controlled isolation through controllable switches and resonant circuits. This electronic isolation provides the necessary galvanic separation while enabling soft switching and resonant power transfer, thereby maintaining high efficiency without compromising reliability.

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

The system achieves efficient and flexible power conversion with reduced losses, enabling seamless integration of various power sources and supporting hybrid renewable power systems and micro-grids by providing isolated AC power and facilitating energy sharing between sources.

Implementation Method 1

the power recuperator is a resonant circuit

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentUS10439392B2Stacked matrix high frequency DC-AC power conversion system and method

Publication Date: 2019.10.08 RHOMBUS ENERGY SOLUTIONS

AI summary

A serial acquisition of multiple power sources via one or more multiplexers which is circulated in many corridors of a multi-port system with a resonant engine. A controller manages multiplexer/switches connecting a first plurality of DC power sources and an auxiliary DC power source to a circulator. A multiplexer/switch revolves each source of power to inverters for DC-AC conversion. Reciprocity of power sharing and management of signal routing between input power sources can be performed to maintain discrete operation between the input/output power sources and individual power inverters for precise load power delivery. Regenerative power from a motor load can be directed to “recharge” an input power source. The resonant engine applied to each power source provides a constant conduit of energy during off-operation/cycles.