Switchable Partial Power DC-DC Topology for Flexible Voltage Conversion
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Solution Overview
Problem
Existing partial power DC-DC converters lack a topology that is controllable between type I and type II, limiting their adaptability in applications such as photovoltaic electric power generation and electromobility.
Innovation Solution
A partial power DC-DC converter with controllable topology, featuring switches that allow switching between type I, type II, and bypass configurations, enabling flexible connection of DC devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed topology (type I or type II) is used in partial power DC-DC converter, then the converter structure is simple, but the adaptability to different applications is limited
Solution Approach 1:
The patent implements a dynamic topology control mechanism where switches (S1, S2) enable real-time switching between type I and type II converter configurations. This dynamic reconfiguration allows the converter to adapt its topology based on application requirements, resolving the contradiction between fixed structure simplicity and adaptability needs.
Solution Approach 2:
The converter design integrates both type I and type II functional capabilities within a single device through controlled switching. The universal structure can operate in multiple modes (type I mode for input-side power splitting, type II mode for output-side power splitting), eliminating the need for separate dedicated converters for different applications.
2Loss of energy
If power is fully processed by DC-DC converter, then complete power conversion is achieved, but power losses and system size increase
Solution Approach 1:
The converter implements power segmentation by splitting the input power into two paths: a direct power link that bypasses the DC-DC conversion process (reducing losses) and a processed power path that goes through the DC-DC converter (enabling voltage transformation). The power splitting ratio is controlled by switches S1 and S2, allowing optimization between loss reduction and conversion completeness.
Solution Approach 2:
Instead of processing 100% of the power through the DC-DC converter, the system applies partial action by processing only the necessary portion of power that requires voltage transformation. The remaining power flows through the direct link, minimizing conversion losses while still achieving the required power delivery.
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
Enables flexible power management and efficient conversion between different voltage levels, enhancing adaptability and efficiency in applications like solar photovoltaic modules and electric vehicle batteries.
Implementation Method 1
a galvanically isolated DC-DC converter (2)
Data Source
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AI summary
The invention provides a partial power DC-DC converter with controllable topology comprising: a galvanically isolated DC-DC converter having a positive input, a negative input, a positive output, and a negative output; a first DC voltage input electrically connected to said negative output of the DC-DC converter; an input reference; a first DC voltage output electrically connected to said positive output of the DC-DC converter; and an output reference electrically connected to said input reference and said negative input of the DC-DC converter; wherein said partial power DC-DC converter additionally comprises: a first switch arranged to selectively connect said first DC voltage input to said positive input of the DC-DC converter; and a second switch arranged to selectively connect said positive output of the DC-DC converter to said positive input of the DC-DC converter.