Bipolar High-Voltage Generator Control for Cathode-Anode Balance
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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
1Power
If a bipolar high-voltage generator operates under unbalanced load conditions between cathode and anode, then the generator can supply power to the X-ray tube, but the cathode voltage and anode voltage become unbalanced
Solution Approach 1:
The patent introduces a voltage balance adjustment mechanism that modifies the output voltage parameters of the bipolar high-voltage generator. By adjusting the cathode voltage and anode voltage independently through a voltage division circuit and feedback control, the system achieves balanced voltage output despite unbalanced load conditions, resolving the contradiction between power supply capability and voltage balance precision
Solution Approach 2:
The patent implements a feedback control system that continuously monitors the voltage difference between cathode and anode outputs. The detection circuit measures the voltage imbalance and feeds this information back to the control circuit, which then adjusts the voltage output accordingly to maintain balance, thereby resolving the voltage balance issue while maintaining power supply functionality
2Manufacturing precision
If additional components are added to balance the voltage output, then the voltage balance improves, but the device complexity and cost increase
Solution Approach 1:
The patent makes the existing output circuit components serve multiple functions. The voltage division circuit and feedback control mechanism are integrated into the existing high-voltage generator architecture, allowing the same components to both supply power and maintain voltage balance, thereby avoiding additional complexity while achieving voltage balance
Solution Approach 2:
The patent merges the voltage balance adjustment function with the existing power supply circuitry. By combining the voltage detection, feedback control, and voltage adjustment functions into the existing system architecture rather than adding separate balance control systems, the patent achieves voltage balance without significantly increasing device complexity or cost
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 voltages, simplifying insulation design and reducing costs while maintaining system stability and reliability.
Implementation Method 1
the bipolar high-voltage generator including an inverter circuit, a first transformer, and a second transformer
Data Source
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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.