Constant-Current Capacitor Discharge for Residual High Voltage
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Solution Overview
Problem
Existing power supplies experience residual high voltage after deactivation, posing risks of electric shock and component damage due to slow voltage dissipation, necessitating a solution for rapid and safe discharge.
Innovation Solution
A constant-current discharge device comprising a discharge voltage detection circuit, voltage level adjustment circuit, and constant-current drive circuit, which activates a constant-current discharge when the DC voltage falls below a threshold, using transistor switches to achieve rapid discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply is deactivated, then energy consumption is reduced, but residual high voltage remains on the capacitor for an extended period (up to ten minutes)
Solution Approach 1:
The patent applies preliminary action by activating a discharge circuit before the power supply is fully deactivated. The control unit detects when the power supply shuts down and automatically initiates the discharge process, ensuring that residual voltage is cleared before maintenance personnel may access the system. This preliminary discharge action resolves the contradiction by maintaining low energy consumption during normal operation while rapidly eliminating residual voltage when needed.
Solution Approach 2:
The patent introduces an intermediary discharge circuit with a controlled switch and discharge resistor. This intermediary component acts as a mediator between the capacitor and ground, providing a controlled path for residual voltage dissipation. The discharge circuit is activated only when needed, maintaining energy efficiency during normal operation while enabling rapid voltage discharge when the power supply is deactivated, thus resolving the time-energy contradiction.
2Device complexity
If the residual voltage dissipates naturally, then no additional discharge circuit is needed, but the discharge period extends up to ten minutes creating safety risks
Solution Approach 1:
The patent introduces an intermediary discharge circuit with a controlled switch and discharge resistor. This intermediary component acts as a mediator between the capacitor and ground, providing a controlled path for residual voltage dissipation. The discharge circuit is activated only when needed, maintaining energy efficiency during normal operation while enabling rapid voltage discharge when the power supply is deactivated, thus resolving the time-energy contradiction.
Solution Approach 2:
The control unit automatically detects when the power supply shuts down and autonomously activates the discharge circuit without requiring manual intervention. The system serves itself by monitoring its own state and initiating the necessary discharge process, thereby improving safety through automated protection while minimizing the need for complex manual control mechanisms.
3Reliability
If a discharge circuit is added to rapidly discharge voltage, then safety is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by activating a discharge circuit before the power supply is fully deactivated. The control unit detects when the power supply shuts down and automatically initiates the discharge process, ensuring that residual voltage is cleared before maintenance personnel may access the system. This preliminary discharge action resolves the contradiction by maintaining low energy consumption during normal operation while rapidly eliminating residual voltage when needed.
Solution Approach 2:
The control unit automatically detects when the power supply shuts down and autonomously activates the discharge circuit without requiring manual intervention. The system serves itself by monitoring its own state and initiating the necessary discharge process, thereby improving safety through automated protection while minimizing the need for complex manual control mechanisms.
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
The device ensures safe and efficient discharge of residual capacitor voltage in under 3 minutes, reducing the risk of electric shock and component damage while maintaining high efficiency.
Implementation Method 1
the constant-current circuit performs a constant-current discharge according to the discharge current
Data Source
AI summary
A constant-current discharge device includes a discharge voltage detection circuit, a voltage level adjustment circuit, a constant-current drive circuit, and a constant-current circuit. The discharge voltage detection circuit is connected between a positive terminal and a negative terminal of a DC voltage, and receives the DC voltage. The voltage level adjustment circuit is connected to the discharge voltage detection circuit, and provides a supply voltage and decides a discharge current. The constant-current drive circuit is connected to the discharge voltage detection circuit and the voltage level adjustment circuit, and provides a drive voltage. The constant-current circuit is connected to the voltage level adjustment circuit and the constant-current drive circuit, and is supplied by the supply voltage and is driven by the drive voltage. When the DC voltage is less than a voltage threshold, the constant-current circuit performs a constant-current discharge according to the discharge current.