Static Eliminator Power Supply with Capacitor Balancing
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Solution Overview
Problem
Existing static eliminators face complexity and increased cost due to the need for feedback control and dual output circuits to achieve balanced generation of positive and negative ions, leading to larger and more expensive devices.
Innovation Solution
A power supply unit with a transformer, rectification circuits, and a capacitor configuration that balances positive and negative currents without feedback control, allowing for simple circuitry and reduced size and cost, while maintaining ion balance through a bypass capacitor and resistive voltage dividers for monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If feedback control is performed to maintain balance of positive and negative ion generation, then ion balance is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the feedback control mechanism entirely from the system. Instead of using complex detection and control circuits to maintain ion balance, the invention uses a simple capacitor connected to the secondary winding that passively balances the positive and negative voltage peaks through its charging and discharging cycles, eliminating the need for feedback control while maintaining ion balance.
Solution Approach 2:
The capacitor in the circuit serves itself by automatically charging during one voltage peak and discharging during the other peak, creating a self-regulating system that balances ion generation without external control. The circuit uses the inherent properties of the capacitor and transformer to maintain balance autonomously.
2Manufacturing precision
If two separate output circuits are provided to control positive and negative voltage, then voltage control precision is improved, but device size and cost increase
Solution Approach 1:
The patent merges the control of positive and negative voltage into a single integrated circuit using one transformer with a capacitor connected to the secondary winding. This single circuit simultaneously generates and balances both positive and negative voltage peaks, eliminating the need for separate output circuits while maintaining voltage control precision through the capacitor's natural charge-discharge behavior.
3Manufacturing precision
If feedback control circuits are implemented to detect ion generation difference, then ion balance is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive feedback control circuits with a simple, inexpensive capacitor that performs the balancing function passively. The capacitor is a low-cost component that achieves the same ion balance effect as complex feedback systems would, dramatically reducing manufacturing cost while maintaining precision.
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 solution enables balanced generation of positive and negative ions with reduced complexity and cost, improving ion balance and extending the lifespan of ion generators by alternately generating ions, thus addressing the issues of ion imbalance and generator wear.
Implementation Method 1
a capacitor provided on a path extending from a node between the second end of the secondary winding and the first rectification circuit and the second rectification circuit to the ground through the secondary winding
Implementation Method 2
the positive and negative voltage peak values at the secondary side of the transformer are varied due to the capacitor electrically connected to the secondary winding
Implementation Method 3
a first rectification circuit including a first diode which is electrically connected to a second end of the secondary winding, an anode of which is electrically connected to the second end, and a cathode of which is electrically connected to a positive-side output terminal
Data Source
AI summary
A power supply unit includes a transformer including a primary winding that receives an alternating-current voltage and a secondary winding including a first end electrically connected to ground, a positive-side rectification circuit including a diode electrically connected to a second end of the secondary winding, an anode of which is electrically connected to the second end, and a cathode of which is electrically connected to a positive-side output terminal, a negative-side rectification circuit including a diode electrically connected to the second end of the secondary winding, a cathode of which is electrically connected to the second end, and an anode of which is electrically connected to a negative-side output terminal, and a capacitor provided on a path from a node between the second end of the secondary winding and the positive-side rectification circuit and the negative-side rectification circuit to the ground through the secondary winding.