X-ray High Voltage Control via Dynamic Pulse Adjustment
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Solution Overview
Problem
Existing systems for controlling high voltage in x-ray applications face challenges in developing high voltage quickly and precisely, especially in medical fields, where they often require higher switching frequencies and are not load-independent, leading to voltage losses.
Innovation Solution
A system comprising a controller with inputs for mains input voltage and outputs for primary-side transformer current, along with distance compensation to provide predetermined pulse frequencies or lengths, allowing for rapid and precise high voltage development.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional high voltage control systems are used, then the system can operate with standard components, but the high voltage development is slow and imprecise
Solution Approach 1:
The system dynamically adjusts switching frequencies and pulse widths based on real-time feedback from the high voltage output and mains voltage conditions. The controller modifies operating parameters on-the-fly to optimize the resonant converter performance, enabling both rapid voltage buildup and precise control throughout the transient and steady-state operation.
Solution Approach 2:
The system incorporates feedback mechanisms that continuously monitor the high voltage output and mains input voltage, using this information to adjust the switching frequency and pulse width. This closed-loop control enables the system to compensate for variations and achieve both fast response and high precision in high voltage generation.
2Speed
If higher switching frequencies are used, then the high voltage can develop more quickly, but the system becomes more sensitive to oscillating circuit variations and cable capacitance
Solution Approach 1:
The system employs dynamic adjustment of switching parameters based on real-time feedback. When operating at higher switching frequencies for faster voltage buildup, the controller continuously adapts the frequency and pulse width to compensate for circuit variations and cable capacitance effects, maintaining stability throughout the transient process.
Solution Approach 2:
The system changes operating parameters (switching frequency, pulse width) dynamically during operation. By adjusting these parameters based on feedback from voltage sensors and knowledge of circuit characteristics, the system can exploit higher frequencies for fast response while compensating for their increased sensitivity to circuit variations.
3Stability of the object's composition
If the system is made load-independent, then voltage stability improves, but voltage losses occur in conventional systems
Solution Approach 1:
The system adjusts switching frequency and pulse width parameters based on load conditions and mains voltage variations. By dynamically optimizing these parameters, the resonant converter maintains voltage stability across different load conditions while minimizing energy losses through efficient resonant operation at the optimal frequency point.
4Adaptability or versatility
If mains voltage variations are accommodated, then the system can work with different input voltages, but the control complexity increases
Solution Approach 1:
The system uses feedback from mains voltage sensors to automatically adjust operating parameters. The controller monitors the input voltage level and modifies switching frequency and pulse width accordingly, enabling the system to adapt to different mains voltage conditions without requiring complex manual configuration or additional hardware components.
Data Source
AI summary
A system is for controlling a high voltage for x-ray applications. In an embodiment, the system includes a controller including at least one input for a mains input voltage, and one output for outputting a primary-side transformer current; and a distance compensation suited to providing the primary-side transformer current with a determined pulse frequency or a determined pulse length.