Current Control Circuit Segmentation for High-Voltage Stability
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Solution Overview
Problem
Existing current control circuits, especially those used in high-voltage applications, face challenges in maintaining current regulation due to finite internal impedance and limited bandwidth, failing to deliver current effectively across a wide range of voltages.
Innovation Solution
A current control circuit comprising a current regulation element and a voltage regulation element, connected in series, with separate control circuits to regulate current and voltage based on reference signals, ensuring the voltage across the current regulation element is maintained at a stable reference voltage, even under varying conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a current source is used in high voltage applications, then current regulation is provided, but the finite internal impedance prevents maintaining current independently of applied voltage and limits bandwidth
Solution Approach 1:
The patent divides the single current control function into two separate control circuits: a first control circuit that regulates current through the current regulation element, and a second control circuit that regulates voltage across the same element. This segmentation allows each circuit to optimize for its specific function, enabling the system to maintain reliable current regulation while adapting to a wider voltage range and higher bandwidth requirements in high voltage applications.
Solution Approach 2:
The current regulation element serves as an intermediary component between the two control circuits. By introducing this intermediate element that can be controlled by both current and voltage signals, the system achieves the ability to maintain stable current regulation while accommodating high voltage conditions, effectively resolving the contradiction between regulation stability and voltage adaptability.
2Power
If voltage across the current regulation element increases in high voltage applications, then higher current delivery capability is achieved, but excessive voltage stress may damage the current regulation element
Solution Approach 1:
The current regulation element acts as an intermediary that is protected by the dual control system. The second control circuit monitors and limits the voltage across this element, preventing excessive voltage stress while allowing the first control circuit to maintain proper current regulation, thus enabling high power delivery without damaging the current regulation element.
Solution Approach 2:
The second control circuit provides voltage feedback to regulate the voltage across the current regulation element. This feedback mechanism ensures that even in high voltage applications, the voltage stress on the current regulation element remains within safe limits, preventing damage while allowing the system to operate at high power levels.
Data Source
AI summary
A current control circuit having a current regulation element, a first control circuit, and a second control circuit. The first control circuit is arranged to regulate, based on a reference current, a current flowing with respect to the current regulation element. The second control circuit is arranged to regulate, based on a reference voltage, a voltage across the current regulation element.