DC Power Converter Mode Switching for Wide Voltage Range
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Solution Overview
Problem
Conventional direct current power converters face challenges in reducing circuit complexity and enhancing performance while maintaining a wide input/output voltage application range.
Innovation Solution
The direct current power converter employs a controller to manage a first full-bridge circuit, allowing it to operate in either full-bridge or half-bridge mode based on total voltages, thereby adjusting the voltage conversion relationship and optimizing circuit performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high design redundancy is required in circuit design and control policy design to implement a wide range of input/output voltage ratio, then the input/output voltage application range is widened, but the circuit size becomes excessively large, circuit weight increases, and direct current power conversion losses increase
Solution Approach 1:
The patent applies dynamics by enabling the full-bridge circuit to dynamically switch between full-bridge mode and half-bridge mode based on voltage ratio requirements. The controller adjusts the working mode in real-time according to the input/output voltage conditions, allowing the circuit structure to adapt flexibly without requiring redundant components for all possible operating conditions. This dynamic switching resolves the contradiction by providing wide voltage range adaptability while maintaining a compact circuit size.
Solution Approach 2:
The patent implements universality by designing the full-bridge circuit to perform multiple functions through mode switching. The same circuit structure serves dual purposes: operating in full-bridge mode for certain voltage conversion ratios and in half-bridge mode for others. This multi-functionality eliminates the need for separate dedicated circuits for different voltage ranges, thereby widening the input/output voltage application range without increasing circuit size or weight.
2Adaptability or versatility
If high design redundancy is required in circuit design and control policy design to implement a wide range of input/output voltage ratio, then the input/output voltage application range is widened, but direct current power conversion losses increase
Solution Approach 1:
The dynamic switching between full-bridge and half-bridge modes allows the system to optimize power conversion efficiency for different operating conditions. The controller selects the appropriate mode based on the voltage ratio requirements, ensuring that the circuit operates in the most efficient configuration for each specific condition. This dynamic adaptation reduces power conversion losses compared to a static redundant design that would incur losses across all operating points.
Solution Approach 2:
The patent applies parameter changes by altering the working mode parameter of the full-bridge circuit (switching between full-bridge and half-bridge modes) to optimize performance. This parameter adjustment enables the circuit to adapt its characteristics to match the required voltage conversion ratio, thereby maintaining high power conversion efficiency across a wide input/output voltage range without the need for high design redundancy.
3Adaptability or versatility
If high design redundancy is required in circuit design and control policy design to implement a wide range of input/output voltage ratio, then the input/output voltage application range is widened, but the circuit structure becomes more complex
Solution Approach 1:
The patent resolves the complexity issue through dynamic mode switching rather than static structural redundancy. Instead of designing a complex circuit structure that can handle all voltage ratios simultaneously, the system uses a simpler full-bridge circuit that dynamically adjusts its operating mode. This approach widens the input/output voltage application range while keeping the circuit structure relatively simple and manageable.
Solution Approach 2:
The full-bridge circuit is designed with universal capability to operate in both full-bridge and half-bridge modes, eliminating the need for multiple dedicated circuits. This multi-functionality allows a single circuit structure to handle a wide range of voltage conversion ratios, thereby widening the application range without increasing structural complexity or requiring additional redundant components.
Data Source
AI summary
The present disclosure provides a direct current power converter comprising a controller, a first power conversion module, and a second power conversion module. A first direct current terminal and a second direct current terminal of the first power conversion module are respectively coupled to a first direct current terminal and a second direct current terminal of the second power conversion module. A third direct current terminal of the first power conversion module is a third direct current terminal of the direct current power converter, a fourth direct current terminal of the first power conversion module is coupled to a third direct current terminal of the second power conversion module, and the first power conversion module includes at least one first full-bridge circuit. The controller is configured to control, based on a first total voltage, the first full-bridge circuit to work in a full-bridge mode or a half-bridge mode.