Voltage Detector Creepage Path Layout for Compact Insulation
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Solution Overview
Problem
Existing voltage generators face challenges in achieving downsizing while maintaining high insulation performance, particularly in the uppermost insulating substrate where high voltage is applied.
Innovation Solution
The voltage generator incorporates a case with ground potential, a high-voltage transformer, a booster circuitry, and a voltage detector. A first bent path is included in the creepage path from the high-voltage portion of the voltage detector to a ground point, enhancing insulation performance while allowing for downsizing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the linear distance between high-voltage and low-voltage portions is increased to ensure insulation performance, then the insulation performance is improved, but the overall size of the voltage generator becomes larger
Solution Approach 1:
The patent applies curvature to the creepage path by introducing bent paths instead of straight lines. The first bent path and second bent path create curved routes from high-voltage portions to ground points, increasing the effective insulation distance without proportionally increasing the linear footprint of the device. This allows the voltage generator to maintain compact dimensions while achieving sufficient creepage distance for high voltage insulation.
2Object-affected harmful factors
If the linear distance between high-voltage and low-voltage portions is increased to prevent discharge, then discharge suppression is improved, but the device becomes larger
Solution Approach 1:
The bent creepage paths with curved geometry increase the discharge suppression capability by lengthening the path that electrical discharge would need to follow. The first bent path and second bent path create longer, curved routes that are more resistant to discharge compared to straight lines, thereby improving discharge suppression without requiring a proportional increase in the device's external dimensions.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by configuring bent paths that extend in multiple directions rather than simple linear extensions. The creepage paths are arranged to utilize vertical and lateral dimensions within the insulating substrates, effectively increasing the discharge path length within a compact volume by exploiting additional spatial dimensions.
Data Source
AI summary
A voltage generator includes: a sealed case having a ground potential; a high-voltage transformer that is housed in the sealed case and boosts a voltage; a booster circuitry that is housed in the sealed case and boosts a voltage outputted from the high-voltage transformer; and a voltage detector that is housed in the sealed case and detects a voltage boosted by the booster circuitry. A first creepage path ranging from a high-voltage portion, which is a portion to which a highest voltage is applied in the voltage detector, to a ground point having an equal potential to the sealed case includes a first bent path, which is a bent path.