Discharging Circuit Voltage Detection Selective Ground Coupling
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Solution Overview
Problem
Electronic products often continue to function due to stored electrical charges in capacitors after the power supply is removed or depleted, leading to uncertainty about whether the power supply is still active, as existing technologies do not effectively discharge these charges to ensure proper system shutdown.
Innovation Solution
A discharging circuit comprising a current-limiting unit, internal energy storage unit, voltage detection unit, and discharge unit is coupled between a power transmission line and a load, which detects voltage levels and directs the discharge of electrical charges from an external energy storage device to ground when the voltage falls below a predetermined level, ensuring a swift drop to 0V and preventing improper operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If capacitors store electrical charges to maintain operation, then the electronic product can continue functioning after power removal, but it becomes uncertain whether the power supply is still active
Solution Approach 1:
The voltage detection unit continuously monitors the voltage level on the power transmission line and provides feedback to the discharge unit. When the voltage drops below the threshold, the feedback mechanism triggers the discharge unit to activate, creating a closed-loop control system that automatically responds to power supply status changes.
Solution Approach 2:
The discharge unit acts as an intermediary component between the power transmission line and ground. It selectively connects to ground based on voltage conditions, serving as a mediator that resolves the contradiction by providing a controlled discharge path only when needed, thus indicating power supply status while allowing temporary charge storage.
2Reliability
If the discharge unit continuously discharges electrical charges, then the voltage drops to 0V ensuring reliable shutdown, but the electronic product cannot continue functioning after power removal
Solution Approach 1:
The discharge unit dynamically changes its state based on voltage conditions. It transitions from a non-conductive state (when voltage is above threshold, allowing capacitor to maintain charge) to a conductive state (when voltage drops below threshold, enabling discharge to ground). This dynamic behavior resolves the contradiction between maintaining charge and discharging charge.
Solution Approach 2:
The voltage detection unit and discharge unit work together in a self-regulating system. When voltage drops, the detection unit automatically triggers the discharge unit to activate without external control, and when voltage is sufficient, the system naturally maintains its operational state. The system serves itself by using its own voltage output to control its discharge behavior.
3Reliability
If the voltage detection unit triggers discharge at low voltage, then the power supply status is clarified, but the discharge may not be swift enough to prevent improper operation
Solution Approach 1:
The discharge unit provides a localized low-resistance discharge path specifically when needed. By creating a dedicated discharge path with low impedance between the power transmission line and ground, the system achieves rapid voltage drop locally at the critical point, ensuring swift discharge when the voltage threshold is reached.
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 discharging circuit efficiently releases stored electrical charges, ensuring the power transmission line voltage drops to 0V, thereby preventing the load from improperly working and clarifying the power supply status, thus ensuring reliable system shutdown.
Implementation Method 1
The voltage detection unit detects a level of the first node
Implementation Method 2
the discharge unit releases stored electrical charges, ensuring the power transmission line voltage drops to 0V
Data Source
AI summary
A discharging circuit discharging electrical charges of an external energy storage device coupled to a power transmission line coupled between a power supply device and a load is provided. The discharging circuit includes a current-limiting unit, an internal energy storage unit, a voltage detection unit and a discharge unit. The current-limiting unit is coupled between the power transmission line and a first node. The internal energy storage unit is coupled between the first node and a ground node. The ground node receives a ground level. The voltage detection unit detects a level of the first node. The discharge unit is coupled between the power transmission line and a second node. When the level of the first node is less than a pre-determined level, the voltage detection unit directs the second node to couple to the ground node.