Series High-Voltage Modules With Staggered Pulses for Ripple Reduction
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Solution Overview
Problem
Existing X-ray systems face challenges in generating high voltage with low or no ripple waves, which affects image quality due to low output capacitance in high voltage generators, leading to decreased contrast and resolution in energy imaging devices like CT scanners.
Innovation Solution
A high voltage generator system comprising multiple modules in series connection, where each module receives a driving pulse at different time points with the same waveform, resulting in phase differences that cancel out ripple waves, thereby reducing the energy of the total ripple wave in the output voltage.
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 switching speed is improved, but ripple waves are generated which decrease 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 its own ripple wave characteristics. By segmenting the system, the total ripple wave energy is distributed and reduced through superposition of multiple voltage components with different phase angles.
Solution Approach 2:
Driving pulses are applied to different high voltage generating modules at different time points, creating periodic voltage components with phase differences. This periodic action with controlled timing ensures that ripple waves from different modules cancel each other through destructive interference, reducing the total ripple wave energy while maintaining fast voltage switching.
2Object-affected harmful factors
If multiple high voltage generating modules are used in series connection to reduce ripple wave energy, then image quality is improved, but device complexity increases
Solution Approach 1:
Each high voltage generating module is designed as a universal, identical unit that can be replicated multiple times. All modules share the same structure and function, allowing for standardized manufacturing and simplified maintenance. The driving module generates all driving pulses with different timing, centralizing control functionality.
Solution Approach 2:
Multiple high voltage generating modules are combined in series connection to achieve the desired output voltage while reducing ripple wave energy. The driving module combines multiple driving pulse generation functions, and the high voltage generating modules are merged to collectively produce the total voltage with reduced ripple through superposition of voltage components.
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 approach improves the declining speed of tube voltage from high to low voltage without increasing ripple wave energy, enhancing image quality by reducing ripple wave energy and maintaining high voltage switching efficiency.
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... energy of a total ripple wave included in the total voltage may be smaller than an energy of a ripple wave included in the voltage component generated by each of the multiple high voltage generating modules
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.