Switching Device with Shared Rectification Circuit for Compact Multi-Output DC-DC Conversion
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Solution Overview
Problem
Conventional DC-DC converters require multiple coils for each output terminal, leading to increased size and complexity when multiple voltages are needed, as each switching device must include a coil, making it difficult to reduce the overall circuit size.
Innovation Solution
A switching device with a shared rectification circuit and multiple output circuits, where sub-switching elements control the flow of electric current to multiple output terminals, reducing the number of coils needed and allowing for independent voltage control of each output terminal through a control circuit that manages the switching of main and sub-switching elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple switching devices are used to output multiple voltages, then each output terminal can be independently controlled, but the number of coils increases and the circuit size increases
Solution Approach 1:
Multiple switching devices are merged into a single integrated switching device that can output multiple voltages simultaneously. The patent combines multiple switching elements (first switching element, second switching element, third switching element) into one device with shared magnetic components, eliminating the need for separate coils for each output terminal while maintaining independent voltage control capability.
Solution Approach 2:
The switching device is designed with multi-functionality to perform multiple voltage transformation tasks using a single device. The patent creates a universal switching device that can simultaneously provide multiple different output voltages through shared magnetic components and multiple switching elements, making each component serve multiple purposes.
2Adaptability or versatility
If each switching device includes a coil, then voltage transformation can be achieved, but the overall circuit size increases when multiple voltages are required
Solution Approach 1:
Multiple coils are merged into a shared magnetic component structure. The patent combines the magnetic components of multiple switching devices into a single shared magnetic component that serves all switching elements, thereby reducing the total number of coils from multiple separate coils to a shared set of magnetic components.
Solution Approach 2:
The magnetic component is designed with universality to perform voltage transformation for multiple output terminals simultaneously. The patent creates a universal magnetic component that can support multiple switching elements and provide multiple different output voltages, making the magnetic component serve multiple transformation functions at once.
3Adaptability or versatility
If multiple coils are used for multiple output terminals, then each output can be independently controlled, but the device complexity increases
Solution Approach 1:
Multiple independent control circuits are merged into a single integrated control structure. The patent combines the control mechanisms for multiple output terminals into one unified switching device with shared magnetic components, reducing the overall circuit complexity while preserving the ability to independently control each output terminal.
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
This configuration allows for a smaller number of coils compared to the number of output terminals, enabling more compact designs while maintaining precise control over output voltages, reducing switching losses, and minimizing power consumption.
Implementation Method 1
a rectification circuit with a coil, connected to the main switching element
Implementation Method 2
a first capacitor smoothing a voltage output to the first output terminal
Data Source
AI summary
A switching device is disclosed in which electric current through a rectification circuit, depending on whether a main switching element turns on or off, and thus electric current from the rectification circuit flows through whichever of first and second sub-switching elements, turns on. By controlling the turning on and off of the first and second sub-switching elements, the switching is performed which determines through which of the first and second output circuits the electric current from the rectification circuit flows. Thus, a voltage that is a result of transforming a voltage from a DC power supply in response to the electric current flowing through the first output circuit, is output from a first output terminal, and a voltage that is a result of transforming a voltage from the DC power supply in response to the electric current flowing through the second output circuit, is output from a second output terminal.