Electrical control system for electrostatic precipitator

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Details

55105, 323241, 323903, B03C 366

Patent

active

050688111

ABSTRACT:
Form factor measurement and fault detection equipment to determine proper sizing of electrical components and efficiency of an electrostatic precipitator (22) by calculating a system form factor from either primary voltage or current. A power source (10) connects serially to an inverse parallel SCR1 and SCR2, to a current limiting reactor (16), and to a T/R set comprising a transformer (18) and rectifier (20) which supply power to precipitator (22). A current transformer (26) senses input current between the reactor (16) and T/R set (18,20) to signal an input scaling and signal conditioner (28) connected to a current meter (34), a voltage meter (39) and a computer (40) having a display monitor (42). The computer (40) is also connected to an SCR control circuit (24) of SCR1 and SCR2. The appropriate electrical characteristic is converted to both its RMS value and average value and then sent to the computer (40). The computer (40) divides the RMS value by the average value and sends the resulting form factor value to the display (42). If system form factor value is not sufficiently close to the purely resistive circuit value of 1.11, then equipment resizing is needed to increase system efficiency. Additionally, secondly electrical characteristics are used to calculate fractional conduction. If the fractional conduction is not sufficiently close to a desired level, equipment adjustments are made to increase system efficiency.

REFERENCES:
patent: 3873282 (1975-03-01), Finch
patent: 4152124 (1979-05-01), Davis
patent: 4290003 (1981-09-01), Lanese
patent: 4587475 (1986-05-01), Finney, Jr. et al.
patent: 4605424 (1986-08-01), Johnston
patent: 4648887 (1987-03-01), Noda et al.
patent: 4860149 (1989-08-01), Johnston
patent: 4936876 (1990-06-01), Reyes
patent: 4996471 (1991-02-01), Gallo

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