DC Boosting Circuit Segmentation for High Ratio
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Solution Overview
Problem
Existing DC boosting circuits face challenges in terms of size and cost due to the high-voltage current capacity requirements for switching elements and diodes, particularly when achieving high boosting ratios, which leads to increased power consumption and complexity.
Innovation Solution
The proposed DC boosting circuit design includes a configuration with multiple switches, diodes, and reactors, utilizing capacitors and reactors in parallel and series configurations to share components and operate in interleaving modes, reducing the load on semiconductor elements and using low ON resistance switch elements to minimize power consumption and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-voltage current capacity switching elements and diodes are used to achieve high boosting ratio, then the boosting performance is improved, but the size and cost increase
Solution Approach 1:
The circuit segments the voltage boosting function across multiple stages with multiple switching elements (Q1, Q2, Q3, Q4) and diodes (D1, D2, D3, D4). Each switching element handles a portion of the total voltage stress, allowing the use of lower-voltage-rated components that are smaller in size while achieving the same overall boosting ratio through cascaded operation.
Solution Approach 2:
The patent combines multiple switching elements and diodes in a modular configuration where they work together to share the voltage and current stresses. The reactors (L1, L2, L3, L4) and capacitors (C1, C2, C3, C4) are also combined in a distributed manner to share energy storage requirements, reducing the size of individual components while maintaining overall system performance.
2Power
If high-voltage current capacity switching elements and diodes are used to achieve high boosting ratio, then the boosting performance is improved, but the cost increases
Solution Approach 1:
By segmenting the voltage handling across multiple lower-voltage switching elements and diodes, the patent enables the use of cheaper, lower-voltage-rated components. Each component operates within its voltage rating, avoiding the need for expensive high-voltage devices while achieving the same overall boosting ratio through the cascaded architecture.
Solution Approach 2:
The patent changes the voltage parameter distribution across components - instead of using a few high-voltage components, it distributes the voltage stress across multiple components with lower individual voltage ratings. This parameter redistribution allows selection of more cost-effective components that meet the overall system requirements without requiring expensive high-voltage parts.
3Power
If high-voltage current capacity switching elements are used, then the boosting capability is improved, but the power consumption increases
Solution Approach 1:
The segmentation of switching elements allows each device to operate at lower voltage and current stress levels, reducing conduction losses (I²R losses) and switching losses in each individual component. The distributed architecture ensures that no single component bears the full burden of high-voltage high-current operation, thereby reducing overall power consumption while maintaining boosting capability.
4Reliability
If complex circuit configuration with multiple switches and diodes is used, then the component load is reduced, but the device complexity increases
Solution Approach 1:
While segmentation into multiple components does increase the number of parts, it distributes the operational stress and failure risk across multiple lower-loaded components. Each switching element and diode operates within safer operating boundaries, improving reliability through load distribution even though the overall circuit complexity increases.
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 design achieves a high boosting ratio while reducing the load on semiconductor elements, minimizing size, weight, and cost, and effectively suppressing inrush currents and reverse recovery operations, thereby enhancing efficiency and reducing power consumption.
Implementation Method 1
a reactor having a first end connected to the first node and a second end connected to a DC power supply
Implementation Method 2
a first capacitor having a first end connected to the second end of the first switch and a second end connected to the second node
Data Source
AI summary
A DC boosting circuit includes switch connected to a first circuit and a second circuit. The first circuit includes first and second elements, and the second circuit includes the second element and a third element. The first and second elements store energy based on an input voltage when the switch is in a first state. The third element stores energy from the second element when the switch is in the second state. The second circuit outputs a voltage greater than the input voltage, and the first, second, and third elements are reactors or capacitors.