Bipolar High-Voltage Generator Control for Balanced X-Ray Tube Voltages
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Solution Overview
Problem
Bipolar high-voltage generators in CT systems face unbalanced cathode and anode loads due to electron scattering, leading to unequal cathode and anode voltages, which complicates insulation design and increases costs and operational challenges.
Innovation Solution
A method to control bipolar high-voltage generators by adjusting the working state of transformers based on a target voltage difference, using separate transformers for cathode and anode circuits, and an inverter circuit to balance the output voltages within a preset range without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate transformers are used for cathode and anode circuits to balance voltage outputs, then voltage balance is improved, but device complexity increases
Solution Approach 1:
The patent divides the high-voltage generation system into separate cathode and anode circuits, each with its own transformer (first transformer for anode, second transformer for cathode). This segmentation allows independent control and balancing of voltages in each circuit, resolving the voltage balance issue while managing complexity through modular design
Solution Approach 2:
The patent adjusts working parameters (such as transformer ratios, switching frequencies, or phase angles) of the first and second transformers to achieve balanced voltage outputs. By dynamically changing these parameters, the system compensates for the inherent voltage imbalance caused by electron scattering in bipolar X-ray tubes
2Ease of manufacture
If voltage balance is achieved within preset range, then insulation design is simplified, but control precision requirements increase
Solution Approach 1:
The patent implements a feedback control mechanism that monitors the voltage outputs of the first and second transformers and adjusts their working parameters accordingly. This feedback loop ensures that the voltage difference remains within the preset range, simplifying insulation design while maintaining the required control precision through automatic regulation
Solution Approach 2:
The patent employs dynamic adjustment of transformer working states to maintain voltage balance. By making the system adaptive and responsive to real-time conditions, it achieves the required voltage control precision without over-constraining the insulation design, allowing for practical manufacturing tolerances
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
Achieves balanced cathode and anode voltage outputs, simplifying insulation design and reducing costs by maintaining voltage differences within a preset range, ensuring stable system operation.
Implementation Method 1
the bipolar high-voltage generator including a first transformer and a second transformer, the bipolar high-voltage generator being connected to a load for supplying a cathode voltage and an anode voltage to the load, the first transformer being provided in an output circuit of the anode voltage, and the second transformer being provided in an output circuit of the cathode voltage
Data Source
AI summary
Disclosed herein are a method of controlling a bipolar high-voltage generator and an X-ray system. The bipolar high-voltage generator is connected to a load for supplying a cathode voltage and an anode voltage to the load. The bipolar high-voltage generator includes a first transformer and a second transformer. The first transformer is provided in an output circuit of the anode voltage, and the second transformer is provided in an output circuit of the cathode voltage. The method of controlling includes: obtaining a target voltage difference of the bipolar high-voltage generator, wherein the target voltage difference is within a preset range; and adjusting a working state of at least one of the first transformer and the second transformer based on the target voltage difference. The target voltage difference is defined as a difference between an absolute value of a target anode voltage and an absolute value of a target cathode voltage output from the bipolar high-voltage generator.