Modular High-Voltage Generation for Ripple-Canceling Fast Switching
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Solution Overview
Problem
Existing high voltage generators for X-ray systems produce ripple waves due to low output capacitance, which degrade image quality in energy imaging devices by reducing contrast and resolution.
Innovation Solution
A high voltage generator with multiple high voltage generating modules connected in series, each receiving driving pulses at different time points with the same waveform, resulting in phase differences that cancel out ripple waves, allowing rapid voltage switching between high and low voltages without increasing ripple energy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the output capacitance of the high voltage generator is reduced to increase the declining speed of tube voltage, then the voltage switching speed is improved, but ripple waves are generated that degrade image quality
Solution Approach 1:
The high voltage generator is divided into multiple independent high voltage generating modules connected in series. Each module generates a voltage component with controlled phase difference, allowing the total output voltage to achieve fast switching while the ripple waves from different modules cancel each other out through phase opposition.
Solution Approach 2:
Multiple voltage components from different high voltage generating modules are combined in series to form the total output voltage. The merging of these phase-shifted voltage components achieves both fast voltage switching and ripple wave cancellation, resolving the contradiction between switching speed and ripple generation.
2Object-affected harmful factors
If multiple high voltage generating modules are used to cancel ripple waves through phase differences, then image quality is improved, but device complexity increases
Solution Approach 1:
The driving pulses applied to multiple high voltage generating modules are designed with periodic time shifts, creating phase differences between the generated voltage components. This periodic timing arrangement enables ripple wave cancellation while maintaining a relatively simple control structure that can be generalized to any number of modules.
3Productivity
If the tube voltage switches rapidly from high to low voltage, then productivity is improved, but the voltage waveform includes ripple waves that reduce measurement precision
Solution Approach 1:
The ripple waves that naturally occur during rapid voltage switching are converted from harmful factors into beneficial elements. By carefully controlling the phase differences between multiple high voltage generating modules, the ripple waves from each module interfere destructively and cancel each other out, transforming the harmful ripple effect into a mechanism for achieving clean, fast voltage transitions that improve both productivity and measurement precision.
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 system improves image quality by reducing ripple waves, enabling faster voltage transitions and maintaining image clarity in energy imaging devices.
Implementation Method 1
The total ripple wave may be formed by a superposition of ripple waves included in voltage components generated by the multiple high voltage generating modules
Implementation Method 2
Time points when the multiple high voltage generating modules receive driving pulses may be different, and waveforms of the driving pulses may be the same
Data Source
AI summary
The present disclosure relates to a high voltage generator including multiple high voltage generating modules configured to provide a total voltage. Each of the multiple high voltage generating modules may be configured to receive a driving pulse and generate a voltage component of the total voltage according to the driving pulse. The multiple high voltage generating modules may be in a series connection. Time points when the multiple high voltage generating modules receive driving pulses may be different, and waveforms of the driving pulses may be the same.