High-Voltage Generator Closed-Loop Control for Fast State Switching

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Solution Overview

Problem

High-voltage generators in X-ray systems face challenges in quickly transitioning between output states, leading to suboptimal system performance due to prolonged state switching times.

Innovation Solution

A method and device for controlling high-voltage generators that involve determining outer and inner loop control parameters based on current and target output voltages, as well as internal physical parameters, to dynamically adjust inner loop control parameters and achieve rapid state switching.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If conventional control methods are used, then the high-voltage generator can maintain stable output, but the state switching time is prolonged

Engineering Contradiction:

Improvestate switching speedVSAvoidstate switching time

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The control method dynamically adjusts inner loop control parameters based on real-time outer loop control parameters and internal physical parameters. This dynamic adaptation allows the system to optimize its response characteristics during state transitions, enabling faster switching speeds while maintaining stability. The inner loop parameters are continuously tuned according to the current operating conditions, making the system adaptable rather than fixed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The invention changes control parameters to achieve rapid state switching. Specifically, it determines inner loop control parameters based on outer loop control parameters and internal physical parameters, effectively changing the system's control characteristics during transitions. This parameter transformation approach allows the system to switch between different operational states more quickly by adjusting key control variables.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the state switching time is reduced, then system performance is enhanced, but voltage and current stresses increase

Engineering Contradiction:

Improvesystem performanceVSAvoidvoltage and current stresses

Core Design Contradiction:

ProductivityVSStress or pressure

Solution Approach 1:

The control method employs feedback mechanisms where inner loop control parameters are determined based on both outer loop control parameters and internal physical parameters of the high-voltage generator. This feedback structure allows the system to monitor its own state and adjust control actions accordingly, preventing excessive voltage and current stresses during rapid transitions while maintaining enhanced system performance.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The invention applies beforehand cushioning by determining inner loop control parameters in advance based on outer loop parameters and internal physical conditions. This preparatory adjustment of control parameters cushions against potential excessive stresses during state transitions, protecting the system components while still achieving rapid switching and enhanced performance.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS20250004491A1Methods and devices for controlling a high-voltage generator

Publication Date: 2025.01.02 SHANGHAI UNITED IMAGING HEALTHCARE

AI summary

The embodiments of the present disclosure provide a method and device for controlling a high-voltage generator, the method includes: obtaining a current output voltage and a target output voltage of the high voltage generator; determining an outer loop control parameter based on the current output voltage and the target output voltage; obtaining one or more internal physical parameters of the high voltage generator; determining one or more inner loop control parameters based on the one or more internal physical parameters and the outer loop control parameter; and determining a closed loop control parameter based on the one or more inner loop control parameters to control the high voltage generator.