Ionizer Circuit With Ripple-Attenuating Capacitor
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Solution Overview
Problem
The existing pulse AC method ionizers face efficiency issues in generating positive high voltage without increasing the withstand voltage of the transformer and experience a drop in negative high voltage output due to ripple voltage in the negative-side high-voltage output circuit.
Innovation Solution
Incorporating a ripple-voltage attenuating capacitor to connect the ground terminal and input terminal of the positive-side high-voltage output circuit, and using resistors to connect the output and input terminals in both high-voltage output circuits, forming Cockcroft-Walton circuits with diodes and capacitors to improve voltage generation efficiency and reduce ripple voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the ground terminal and input terminal are isolated to reduce transformer withstand voltage, then the transformer withstand voltage is reduced, but the alternate current flow path is prolonged lowering generation efficiency
Solution Approach 1:
The patent divides the high-voltage generating system into separate positive-side and negative-side circuits, each with isolated ground terminals. This segmentation allows the transformer withstand voltage to be reduced while preventing alternate current from flowing through the entire system, thereby maintaining generation efficiency.
Solution Approach 2:
The patent introduces a coupling capacitor as an intermediary element between the positive-side and negative-side high-voltage output circuits. This capacitor enables the circuits to be electrically isolated (reducing transformer withstand voltage requirements) while still allowing the alternating connection to the discharge electrode to function properly.
2Power
If the Cockcroft-Walton circuit is used for voltage boosting, then the high voltage is generated, but the ripple voltage is superimposed on the output lowering the negative high voltage output
Solution Approach 1:
The patent extracts and removes the harmful ripple voltage component from the high-voltage output by using separate Cockcroft-Walton circuits for positive and negative voltage generation. By isolating the ripple generation to each polarity's circuit and using the coupling capacitor arrangement, the ripple's harmful effect on the overall output is eliminated.
Solution Approach 2:
Instead of trying to reduce the ripple voltage directly in the conventional Cockcroft-Walton configuration, the patent inverts the approach by using two separate circuits with opposite polarities and coupling them through a capacitor. This inversion of the conventional single-circuit approach naturally cancels out the ripple voltage effects.
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
This configuration enhances the efficiency of positive high voltage generation and prevents a drop in negative high voltage output by attenuating ripple voltage, resulting in improved ionization efficiency without increasing transformer withstand voltage.
Implementation Method 1
The Cockcroft-Walton circuit is a circuit in which rectification by the diodes D and smoothing by the capacitors C are combined together to output a boosted direct-current high voltage
Implementation Method 2
The Cockcroft-Walton circuit is a circuit in which rectification by the diodes D and smoothing by the capacitors C are combined together to output a boosted direct-current high voltage
Implementation Method 3
an alternating current component is superimposed on a direct-current high voltage Vo output from the high-voltage output circuits 33a and 33b, so the direct-current high voltage Vo has a ripple waveform as illustrated in FIG. 4
Data Source
AI summary
An ionizer includes: a positive-side transformer, and a negative-side transformer; a positive-side high-voltage output circuit that has a first input terminal and a second input terminal that are respectively connected to a ground terminal and a power supply terminal, the ground terminal and power supply terminal being provided on the secondary of the positive-side transformer, and also has a first output terminal from which a direct-current positive high voltage is output; a negative-side high-voltage output circuit that has a third input terminal and a fourth input terminal that are respectively connected to a ground terminal and a power supply terminal, the ground terminal and power supply terminal being provided on the secondary of the negative-side transformer, and also has a second output terminal from which a direct-current negative high voltage is output; and a discharge electrode connected to the first output terminal. The ground terminal in the positive-side transformer and the first input terminal in the positive-side high-voltage output circuit are mutually connected through an attenuating capacitor.