Multi-Stage DC Converter With Adjustable Transformation Ratio
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Solution Overview
Problem
DC/DC converters often require complex regulation and are limited in flexibility due to voltage-source operation, which restricts their applications and increases complexity.
Innovation Solution
A converter design with a power unit comprising multiple stages and a regulator unit that adjusts the actual transformation ratio to match a predetermined target ratio, allowing for low-complexity regulation and flexible operation without needing voltage-source networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DC/DC converters are operated as voltage sources, then voltage regulation is achieved, but device complexity and regulation complexity increase
Solution Approach 1:
The patent changes the operating parameter from voltage-source mode to current-source mode. The converter now regulates current instead of voltage, which simplifies the regulation mechanism while maintaining reliable operation. The power unit is controlled to provide a controlled current to the output, and the transformation ratio is adjusted to match target values, achieving reliable voltage conversion without complex voltage regulation.
2Stability of the object's composition
If DC/DC converters are operated as voltage sources, then voltage stability is maintained, but adaptability and flexibility are reduced
Solution Approach 1:
The patent introduces dynamic adjustment capability through the regulator unit that can modify the transformation ratio of the power unit. Instead of fixed voltage-source operation, the system dynamically adjusts the transformation ratio to match a target transformation ratio, enabling adaptation to different operating conditions and applications while maintaining stable power conversion.
Solution Approach 2:
By operating as a current source with adjustable transformation ratio, the converter becomes universally applicable to different scenarios. The power unit can be adapted to various load conditions and voltage levels by adjusting the transformation ratio, making the converter versatile for different applications without requiring complex voltage-source networks.
3Reliability
If voltage-source networks are used for DC/DC conversion, then voltage regulation is achieved, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the need for complex voltage-source networks from the DC/DC conversion system. By using a current-source operation mode with a regulator unit that controls the transformation ratio, the system achieves voltage regulation functionality without requiring external voltage-source networks, thereby reducing overall device complexity.
Data Source
AI summary
A converter converts a DC input voltage into a DC output voltage. The converter includes: a regulator unit coupled to a power unit. The power unit has: a first converter stage, with two input connections; a second converter stage, which is connected to the first converter stage; and a third converter stage, which is connected to the second converter stages and has two output connections. The first, second, and third converter stages are adapted so that, when the DC input voltage is applied, the DC output voltage is supplied during operation of the converter. An actual transformation ratio of the power unit is defined: by a ratio between the DC input voltage and the DC output voltage, or by a ratio between an input current and an output current. The regulator unit acts on the power unit such that the actual transformation ratio is matched to a predetermined transformation ratio.