Series Constant-Voltage Circuits for Radiation Resistance
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Solution Overview
Problem
Constant-voltage generating apparatuses in radiation environments, such as nuclear power plants, experience output voltage fluctuations due to radiation effects on semiconductor elements, which existing technologies fail to adequately address.
Innovation Solution
A constant-voltage generating apparatus comprising multiple constant-voltage circuits connected in series, each with a control unit that regulates voltage between positive and negative power supply nodes, and includes voltage dividing resistors and a current path to maintain stable voltage, along with a shared capacitor for stabilization, and a constant-current circuit to regulate power-supply current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple constant-voltage circuits are connected in series to reduce voltage applied to semiconductor elements, then radiation resistance is improved, but device complexity increases
Solution Approach 1:
The power supply circuit is divided into multiple constant-voltage circuits connected in series, with each circuit receiving a portion of the total voltage. This segmentation reduces the voltage stress on individual semiconductor elements, thereby improving radiation resistance while distributing the complexity across modular units.
2Stability of the object's composition
If voltage dividing resistors are used to divide voltage in each constant-voltage circuit, then voltage stability is improved, but power consumption increases
Solution Approach 1:
Each constant-voltage circuit incorporates feedback control mechanisms where voltage dividing resistors provide sampled voltage signals that are compared with reference voltages. The control units adjust circuit parameters based on these comparisons to maintain stable output voltage while optimizing power consumption through intelligent control.
3Stability of the object's composition
If a shared capacitor is provided between the last and first stage circuits, then voltage fluctuation suppression is improved, but device complexity increases
Solution Approach 1:
A shared capacitor is implemented that is electrically connected between the output of the last constant-voltage circuit stage and the input of the first stage. This merging of the capacitor across stage boundaries creates a feedback path that suppresses voltage fluctuations throughout the entire series-connected system without requiring separate capacitors for each stage.
4Stability of the object's composition
If constant-current circuit is added to regulate power-supply current, then current stability is improved, but device complexity increases
Solution Approach 1:
The control units within each constant-voltage circuit are designed to perform multiple functions: they regulate voltage output while simultaneously working in conjunction with the constant-current circuit to control power-supply current. This multi-functionality allows current stability to be achieved without adding dedicated control hardware for each parameter.
Data Source
AI summary
A constant-voltage generating apparatus including a plurality of constant-voltage circuits connected in series is provided. Each of the constant-voltage circuits has a positive-side power supply node, a negative-side power supply node, and a control unit that controls voltage between the positive-side power supply node and the negative-side power supply node to be constant voltage. The positive-side power supply node in the constant-voltage circuit at a preceding stage is connected to the negative-side power supply node in the constant-voltage circuit at a subsequent stage. The constant-voltage generating apparatus may further include a constant-current circuit that regulates power-supply currents flowing through the plurality of constant-voltage circuits to be constant.