G - Physics – 05 – B
Patent
G - Physics
05
B
G05B 13/02 (2006.01) B03C 3/68 (2006.01)
Patent
CA 2069881
Form factor measurement and fault detection equipment to determine proper sizing of electrical components and efficien- cy 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 SCR 1 and SCR 2, 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 be- tween 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 con- trol circuit (24) of SCR 1 and SCR 2. The appropriate electrical characteristic is converted to both its RMS value and average va- lue 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, secondary 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.
Farmer Terry L.
Johnston David F.
Bha Group Inc.
Smart & Biggar
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