DC-DC Converter Dynamic Series Parallel Switching
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Solution Overview
Problem
Existing power supply systems for DC power sources lack the ability to effectively utilize two DC power sources by controlling output voltage, as they do not consider series connection modes, leading to inefficient power management.
Innovation Solution
A power supply system with a power converter that includes switching elements to switch between parallel and series connection modes of two DC power sources, allowing for controlled DC voltage conversion and efficient power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If two DC power sources are connected in parallel to supply electric power to the load, then the power supply capacity is improved, but the adaptability to different voltage requirements deteriorates
Solution Approach 1:
The patent implements dynamic switching between parallel and series connection modes of the two DC power sources through switching elements. The system can dynamically adjust the connection configuration based on voltage requirements, allowing the power supply system to adapt to different operating conditions while maintaining high power supply capacity.
Solution Approach 2:
The patent creates a multi-functional power supply system that can operate in both parallel connection mode (for high current applications) and series connection mode (for high voltage applications). This universal design allows the same two DC power sources to serve multiple voltage requirements, enhancing the system's versatility.
2Stress or pressure
If series connection of two DC power sources is implemented, then the output voltage is improved, but the power supply capacity deteriorates
Solution Approach 1:
The system dynamically switches between series and parallel connection modes based on the required output characteristics. When high voltage is needed, the system operates in series mode; when high power supply capacity is needed, it switches to parallel mode. This dynamic adaptation resolves the contradiction between voltage and power supply capacity.
Solution Approach 2:
The patent changes the electrical connection parameters (series or parallel) of the DC power sources to adjust the system's output characteristics. By changing the connection configuration, the system can optimize both voltage and power supply capacity for different operating conditions.
3Ease of operation
If only parallel connection mode is used for two DC power sources, then the ease of operation is improved, but the adaptability to different operation modes deteriorates
Solution Approach 1:
The patent introduces dynamic switching capability that allows the system to transition between parallel and series connection modes. The control unit automatically manages the switching process, maintaining ease of operation while significantly enhancing adaptability to different operation modes and voltage requirements.
Data Source
AI summary
The power supply system includes a first DC power source, a second DC power source, and a power converter having a plurality of switching elements and reactors. The power converter is configured to be switchable, by the control of the plurality of switching elements, between a parallel connection mode in which DC voltage conversion is executed with the DC power sources connected in parallel with a power line and a series connection mode in which DC voltage conversion is executed with the DC power sources connected in series with the power line. Each of the switching elements is arranged to be included both in a power conversion path between the first DC power source and the power line PL and a power conversion path between the second DC power source and the power line.