Capacitive Voltage-Dividing Core Layout for Interference-Resistant Sampling
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Solution Overview
Problem
Existing high-voltage electrical appliances face issues with low sampling accuracy due to small capacitance and susceptibility to interference, despite the use of shielding capacitive screens.
Innovation Solution
The capacitive voltage-dividing insulating core body features a layout where shielding capacitive screens are arranged alternately with insulating layers, with a radial distance between outer and inner shielding capacitive screens greater than that between shielding and voltage-sharing capacitive screens, forming a shielding anti-interference capacitor to reduce interference and improve sampling accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If shielding capacitive screens are added to improve sampling accuracy, then anti-interference capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the shielding function with the existing capacitive screen structure by integrating shielding capacitive screens into the insulating core body alongside voltage-sharing and voltage-dividing capacitive screens. This merging approach achieves anti-interference capability without adding completely separate shielding structures, thus improving sampling accuracy while controlling device complexity.
Solution Approach 2:
The capacitive screens in the insulating core body serve multiple functions: voltage sharing, voltage division, and electromagnetic shielding. By making the shielding capacitive screens part of the existing capacitive structure, the system achieves multi-functionality where the same structural elements provide both electrical function and shielding function, avoiding additional complexity.
2Object-affected harmful factors
If shielding capacitive screens are arranged closely to voltage-sharing capacitive screens, then shielding effectiveness is improved, but interference with voltage-sharing function increases
Solution Approach 1:
The patent applies different radial distances for shielding capacitive screens at different positions: the outer shielding screen has a greater radial distance from the voltage-sharing capacitive screen compared to the inner shielding screen. This local variation in spacing creates different shielding effectiveness and interference levels at different locations, optimizing both shielding performance and voltage-sharing function reliability.
Solution Approach 2:
The asymmetric arrangement of shielding capacitive screens with different radial distances from the voltage-sharing capacitive screens creates an optimized electromagnetic field distribution. The unequal spacing allows the system to achieve effective shielding while maintaining proper voltage-sharing function by preventing excessive coupling between adjacent capacitive screens.
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 layout effectively shields voltage-sharing capacitive screens from external interference, enhancing the accuracy of signal collection while maintaining low power consumption and compact size.
Implementation Method 1
a plurality of shielding capacitive screens 103 which are arranged alternately with insulating layers are arranged around at least part of the voltage-sharing capacitive screens 101; the plurality of shielding capacitive screens 103 form a shielding anti-interference capacitor C3
Implementation Method 2
A plurality of voltage-sharing capacitive screens 101 which are arranged in a first insulating core body 10 and arranged alternately with insulating layers in a surrounding manner, and the plurality of voltage-sharing capacitive screens 101 form a voltage-sharing capacitor C1; the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form a capacitive voltage divider
Data Source
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AI summary
The present invention relates to an anti-interference structure of a capacitive voltage-dividing insulating core body, and a high-voltage electrical appliance and an isolating switch which adopt the insulating core body. The capacitive voltage-dividing insulating core body includes a plurality of voltage-sharing capacitive screens which are arranged in a first insulating core body and arranged alternately with insulating layers in a surrounding manner, and the plurality of voltage-sharing capacitive screens form a voltage-sharing capacitor; the voltage-sharing capacitor and a voltage-dividing capacitor are connected in series to form a capacitive voltage divider; a plurality of shielding capacitive screens which are arranged alternately with the insulating layers are arranged around at least part of the voltage-sharing capacitive screens; the plurality of shielding capacitive screens form a shielding anti-interference capacitor; and in a radial direction of the first insulating core body, a distance between the shielding capacitive screen located on the outer side and the voltage-sharing capacitive screen correspondingly surrounded by the shielding capacitive screen is greater than a distance between the shielding capacitive screen located on the inner side and the voltage-sharing capacitive screen correspondingly surrounded by the shielding capacitive screen. Therefore, the influence of the shielding capacitive screens absorbing interference signals on the voltage-sharing capacitive screens can be reduced, and external interference signals can be eliminated, thereby improving the accuracy of the collected signals.