Discharge Apparatus for Stabilizing Capacitor Residual Charge Removal
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Solution Overview
Problem
Residual charge in stabilizing capacitors can cause failure in the boot-up procedure of electronic apparatuses due to incomplete discharge during shutdown, and conventional methods to address this issue are inconvenient and lack control over discharge time.
Innovation Solution
A discharge apparatus comprising a rectification circuit, a charge storage unit, a first discharge circuit, and a second discharge circuit is coupled to the power supply voltage and load capacitor, enabling a first and second discharge path to accelerate the discharge of residual charge, thereby preventing it from affecting the power-on sequence during boot-up.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power supply system is powered off and waited for a period of time for natural discharge, then the residual charge is discharged completely, but the time required for discharge is long and not easily controlled
Solution Approach 1:
The patent introduces a discharge apparatus as an intermediary device between the power supply system and ground. This apparatus includes a rectification circuit, charge storage unit, and discharge circuits that actively manage the discharge process. The intermediary device accelerates discharge by providing controlled discharge paths, reducing the waiting time from an uncontrolled period to a managed, shortened duration while ensuring complete discharge of residual charge.
Solution Approach 2:
The patent changes the discharge parameter from passive natural discharge to active controlled discharge. By introducing discharge circuits with controllable resistance and active components (such as transistors or MOSFETs), the discharge time constant is significantly reduced. The system transitions from relying on the inherent slow discharge characteristics of capacitors to an actively controlled process where discharge rate can be regulated, achieving both complete discharge and reduced time.
2Stability of the object's composition
If stabilizing capacitors are used for voltage stability, then power supply stability is improved, but residual charge affects the power-on sequence in boot-up procedure
Solution Approach 1:
The patent extracts the harmful residual charge from the system by providing dedicated discharge paths that remove charge from the stabilizing capacitors and load capacitor. The discharge apparatus actively pulls charge out of these capacitors through controlled discharge circuits, separating the voltage stability function (maintained during operation) from the residual charge elimination function (activated during shutdown), thereby eliminating the harmful interference in the power-on sequence.
Solution Approach 2:
The patent applies preliminary action by discharging the stabilizing capacitors before the power-on sequence begins. The discharge apparatus is activated during the shutdown state to completely clear residual charge from all capacitors before the system enters the boot-up procedure. This preliminary discharge action prevents any potential interference with the subsequent power-on sequence, ensuring clean startup conditions.
3Reliability
If conventional waiting method is used for discharge, then residual charge is eliminated, but convenience of use is reduced
Solution Approach 1:
The patent implements self-service by making the discharge process automatic and transparent to the user. The discharge apparatus is integrated into the power supply system and automatically activates during shutdown without requiring user intervention. The system manages its own residual charge elimination through controlled discharge paths, eliminating the need for users to wait or manually initiate discharge procedures, thereby maintaining convenience while ensuring reliable charge elimination.
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
Significantly shortens the time required for discharging residual charge, ensuring a stable power-on sequence without the need for prolonged waiting periods.
Implementation Method 1
The rectification circuit induces a current flowing through the rectification circuit to unidirectionally flow from the power supply voltage to the charge storage unit
Implementation Method 2
The charge storage unit is coupled between the rectification circuit and a ground. The charge storage unit is configured to store charge
Implementation Method 3
A first discharge path is provided by the first discharge circuit according to a voltage supplied by the charge storage unit in the shutdown state, so as to discharge the charge storage unit
Implementation Method 4
A second discharge path is provided by the second discharge circuit according to a voltage across on the first discharge path in the shutdown state, so as to discharge the load capacitor
Data Source
AI summary
A discharge apparatus is provided. A second discharge path is provided by a second discharge circuit started by a voltage across on a first discharge path provided by a first discharge circuit, so as to discharge a load capacitor.