Voltage Sampler Conducting Layer for Compact High-Voltage Insulation
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Solution Overview
Problem
The existing input voltage samplers for solid-state transformers have a large volume due to the need for extensive insulation to protect against high voltage differences, which increases the size and complexity of the device.
Innovation Solution
A voltage sampler design that includes a conductive housing with sampling boards and a conducting layer between the sampling boards and the housing, where the conducting layer reduces the voltage difference and minimizes the insulation requirements, allowing for a more compact structure by using a combination of solid and air insulation and strategically placing conducting layers to equalize voltage differences across resistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extensive insulation is used to protect against high voltage differences, then the reliability is improved, but the volume increases
Solution Approach 1:
The patent introduces an intermediate conducting layer between the high-voltage sampling board and the housing, connected to a reference potential point. This creates equipotential regions that reduce the voltage difference across insulation boundaries, allowing for reduced insulation thickness while maintaining reliability against voltage differences.
Solution Approach 2:
The intermediate conducting layer acts as a mediator between the high-voltage sampling board and the housing. By introducing this reference potential layer, the patent reduces the stress on insulation materials without compromising the protective function, thereby reducing volume while maintaining reliability.
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
The proposed solution reduces the volume of the voltage sampler and solid-state transformer by minimizing the insulation requirements and voltage differences, thereby enhancing the insulation effect and reducing the risk of damage from excessive electric fields.
Implementation Method 1
a potential of the conducting layer is between a potential of the voltage input end and a potential of the housing... reduce a voltage difference between the sampling board and a surrounding conductor, and reduce a risk of damage to the sampling board due to excessive breakdown field strength
Data Source
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AI summary
This application provides a voltage sampler and a solid-state transformer. The voltage sampler includes a conductive housing, at least one sampling board located inside the housing, and a conducting layer. Each sampling board includes at least two resistors and a voltage input end. The resistors in the sampling board are electrically connected in sequence in a direction from a first end to a second end. A resistor at the first end is electrically connected to the voltage input end. A resistor at the second end is electrically connected to the housing, and the housing is electrically connected to a fixed potential end. The conducting layer is disposed between the at least one sampling board and the housing in the voltage sampler. The conducting layer is electrically connected to a resistor in the sampling board, and a potential of the conducting layer is greater than that of the fixed potential end and less than that of the voltage input end. The conducting layer is disposed between the sampling board and the housing, so that a requirement on insulation between the sampling board and a surrounding conductor can be reduced, and a volume of the voltage sampler can be reduced.