Partial power DC-DC converter with controllable topology
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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 various applications.
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 controllable topology that can dynamically switch between type I and type II configurations based on application requirements. The converter uses switching elements to reconfigure the power flow paths, allowing the system to adapt its topology in real-time rather than being fixed to a single configuration.
Solution Approach 2:
The patent designs a universal partial power DC-DC converter that can perform multiple functions by switching between type I and type II topologies. This multi-functional design allows the same converter structure to serve different application needs (photovoltaic systems, electric vehicles, energy storage) without requiring separate dedicated converters for each application type.
2Loss of energy
If power is fully processed by DC-DC converter, then voltage conversion is achieved, but power losses and system size increase
Solution Approach 1:
The patent applies power segmentation by dividing the total power into two paths: a direct power link that bypasses the DC-DC converter for minimal loss transmission, and a processed power path that goes through the DC-DC converter for necessary voltage conversion. This segmentation allows the system to minimize power losses while maintaining voltage conversion capability where needed.
Solution Approach 2:
The patent implements partial power processing where only the necessary portion of power undergoes DC-DC conversion, while the remaining power is directly transmitted. This partial action approach reduces the burden on the DC-DC converter, minimizing losses and system size while still achieving the required voltage conversion for the specific application needs.
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 and negative input; a positive and negative output; a DC voltage input electrically connected to said positive input of the DC-DC converter; an input reference; a DC voltage output electrically connected to said positive output of the DC-DC converter; an output reference electrically connected to said input reference; said partial power DC-DC converter additionally comprising: a first switch for selectively connecting said positive input to said negative output of the DC-DC converter; a second switch for selectively connecting said negative input of the DC-DC converter to said input reference; a third switch for selectively connecting said negative output of the DC-DC converter to said output reference; and a fourth switch for selectively connecting said positive output to said negative input of the DC-DC converter.