High-Voltage Generator Shielding Layout for Stray Capacitance
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Solution Overview
Problem
High-voltage generators face issues with stray capacitance between conductive components, which can damage electrical elements due to high voltage and abrupt potential changes, and conventional methods to reduce this capacitance increase the device's volume.
Innovation Solution
Incorporating a shielding device, such as a shielding plate or voltage-multiplying capacitor, between the rectifying unit and the grid-controlled unit to reduce stray capacitance without increasing the device's volume, by adjusting the angle and projection area of the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the distance between the rectifying unit and the grid-controlled unit is increased to reduce stray capacitance, then the stray capacitance is reduced, but the volume of the electrical apparatus increases
Solution Approach 1:
A shielding device is introduced as an intermediary component between the rectifying unit and the grid-controlled unit. The shielding device includes a shielding plate and voltage-multiplying capacitors that electrically connect the shielding plate to the rectifying unit, creating an equipotential region that reduces stray capacitance without requiring increased distance between components.
Solution Approach 2:
The shielding device is electrically connected to the rectifying unit to establish equipotential regions. By making the shielding plate and rectifying unit equipotential, the electric field distribution is optimized and stray capacitance is reduced while maintaining compact component spacing.
2Object-affected harmful factors
If the distance between the rectifying unit and the grid-controlled unit is increased to reduce stray capacitance, then the stray capacitance is reduced, but the device complexity increases
Solution Approach 1:
The shielding device serves multiple functions simultaneously: it acts as a shielding plate to reduce stray capacitance, functions as an electrode in the voltage-multiplying capacitor circuit, and provides structural support. This multi-functionality reduces the need for separate components and simplifies the overall device structure.
Solution Approach 2:
The shielding plate and voltage-multiplying capacitors are integrated into a single shielding device assembly. The shielding plate is electrically connected to the rectifying unit through the voltage-multiplying capacitors, combining multiple functional elements into one unified component that reduces stray capacitance without increasing device complexity.
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 normal and stable operation of the high-voltage generator across a wide range of voltages, preventing damage to electrical elements while maintaining compactness and reducing costs.
Implementation Method 1
Stray capacitance usually exists between two conductive components of an electrical apparatus (e.g., a conductive housing of a grid-controlled unit and a rectifying unit of a high-voltage generator)
Implementation Method 2
The shielding device may include at least one voltage-multiplying capacitor
Data Source
AI summary
A high-voltage generator may be provided. The high-voltage generator may include a rectifying unit, a grid-controlled unit, and a shielding device. The rectifying unit may be configured to rectify an electric current generated in the high-voltage generator. The grid-controlled unit may be configured to generate a high voltage and electrically connected to the rectifying unit. The grid-controlled unit may have a conductive surface that opposes the rectifying unit. The shielding device may be located between the rectifying unit and the conductive surface of the grid-controlled unit. The shielding device may be spaced apart from the rectifying unit and the conductive surface of the grid-controlled unit. The shielding device may be electrically connected to the rectifying unit.