Method and circuit for balance control of positive and negative

Details Method and circuit for balance control of positive and negative Method and circuit for balance control of positive and negative

1988-07-20

1989-10-03

Pellinen, A. D.

Electricity: electrical systems and devices

Discharging or preventing accumulation of electric charge

By charged gas irradiation

361229, 361230, 250324, 55139, 323903, H01T 2300, H05F 304

Patent

active

048720836

ABSTRACT:
A balancing system for electrical A.C. air ionizers having at least one discharge electrode adjacently spaced from a proximity ground and connected to the high side of an A.C. high voltage power source includes (a) a capacitor interposed between each electrode and the high voltage source to maintain a bias on each of the electrodes by blocking the D.C. current component across the circuit capacitance between the discharge electrodes and ground, and (b) a by-pass resistor across the circuit capacitance for providing a path to ground to bleed off excess bias so that equal positive and negative ion densities are generated during corona flow, the by-pass resistor having a resistance value which is determined by the parameters of the system's corona characterisitics (including corona onset voltage and average current flow) that will provide a required equilibrium bias for producing the correct ratios of positive and negative ion currents as will balance the ion densities. Adjustable means are also provided for varying the by-pass resistance to compensate for changes in positive and negative ion flow that are caused by environmental factors and contamination.

REFERENCES:
patent: 4618249 (1986-10-01), Minor
patent: 4638397 (1987-01-01), Foley
patent: 4808200 (1989-02-01), Dallhammer et al.

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