High Voltage Driving Device for X-ray Tube with Series Rectifiers
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Solution Overview
Problem
Conventional high voltage driving circuits for X-ray tubes require multiple unit voltage multiplying circuits, leading to low energy transfer efficiency, high ripple voltage, and increased capacity, making it difficult to manufacture compact and inexpensive devices.
Innovation Solution
A high voltage driving device with a first and second voltage multiplying rectifier unit in series, utilizing a high voltage generation unit with isolation and high voltage transformers to generate a stable, efficient high-voltage power, and a filament transformer unit for insulation, reducing the number of unit voltage multiplying circuits and improving energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple unit voltage multiplying circuits are used to generate high voltage power, then the required voltage level is achieved, but energy transfer efficiency decreases and ripple voltage increases
Solution Approach 1:
The voltage multiplying rectifier unit is divided into a first voltage multiplying rectifier unit and a second voltage multiplying rectifier unit connected in series. Each unit independently processes high voltage power, reducing the burden on individual circuits and improving overall energy transfer efficiency while maintaining the required high voltage output level.
2Power
If multiple unit voltage multiplying circuits are used to generate high voltage power, then the required voltage level is achieved, but ripple voltage increases
Solution Approach 1:
By segmenting the voltage multiplying rectifier into two separate units connected in series, each unit generates a portion of the total high voltage. This segmentation distributes and reduces ripple voltage accumulation, resulting in lower overall ripple voltage while achieving the required voltage level.
3Power
If multiple unit voltage multiplying circuits are used to generate high voltage power, then the required voltage level is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The first and second voltage multiplying rectifier units are merged in a series configuration, sharing common high voltage generation resources. This merging reduces the total number of independent voltage multiplying circuits needed while still achieving the required high voltage output level, thereby simplifying device complexity and reducing manufacturing cost.
4Power
If high voltage is applied to the voltage multiplying rectifier unit, then the X-ray tube can be driven, but insulation properties deteriorate
Solution Approach 1:
The high voltage generation path is segmented into two series-connected voltage multiplying rectifier units, which distributes the voltage stress across multiple stages. This segmentation, combined with isolation transformers, maintains better insulation properties by preventing voltage breakdown at any single point while still delivering the required high voltage to the X-ray tube.
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 solution enables the generation of rectified high-voltage power with high energy efficiency, allowing for the manufacture of compact and inexpensive X-ray tube driving devices with improved insulation properties.
Implementation Method 1
an inverter unit for receiving a supply of a commercial AC power and converting the received commercial AC power into a high-frequency AC power
Implementation Method 2
a high voltage generation unit for receiving a supply of the high-frequency AC power generated from the inverter unit through a primary coil thereof and inducing a high-voltage power corresponding to the turns ratio of the primary coil and a secondary coil thereof to the secondary coil
Implementation Method 3
a voltage multiplying rectifier unit for receiving a supply of the high-voltage power from the high voltage generation unit and generating a rectified high-voltage power having a level needed to drive the X-ray tube
Implementation Method 4
a plurality of isolation transformers or high voltage transformers is in series connected to each other in the high voltage generation unit to divide a voltage of the second voltage multiplying rectifier unit into a withstanding voltage of the isolation transformers or the high voltage transformers
Data Source
AI summary
The present invention relate to an X-ray photographing apparatus, and more particularly, to a high voltage driving circuit for X-ray tube, in which a first voltage multiplying rectifier unit and a second voltage multiplying rectifier unit are in series connected to each other based on a high voltage generation unit to stably convert a high voltage power generated from the high voltage generation unit into a drive power for an X-ray tube with high energy efficiency, and in which a plurality of isolation transformers or high voltage transformers is in series connected to each other in the high voltage generation unit to divide a voltage of the second voltage multiplying rectifier unit into a withstanding voltage of the isolation transformers or the high voltage transformers, thereby ensuring excellent insulation properties.