초록 ▼

An air regulator system for a powder coating system and method of operating the system whereby air regulators constructed with inexpensive, on-off servo control valves are positioned side by side and secured to a common bracket and are operated with a pulse width modulating circuitry that quickly an

An air regulator system for a powder coating system and method of operating the system whereby air regulators constructed with inexpensive, on-off servo control valves are positioned side by side and secured to a common bracket and are operated with a pulse width modulating circuitry that quickly and accurately controls the regulator. The circuitry is carried on a circuit board which is also mounted to the common bracket.

대표청구항 ▼

[ What is claimed is:] [1.] A circuit which produces two pulse width modulated square waves for controlling a vent valve and a fill valve of an air regulator, comprising:means for generating a reference signal corresponding to a desired pressure in an outlet port of said air regulator;means for gene

[ What is claimed is:] [1.] A circuit which produces two pulse width modulated square waves for controlling a vent valve and a fill valve of an air regulator, comprising:means for generating a reference signal corresponding to a desired pressure in an outlet port of said air regulator;means for generating a feedback signal envelope in response to the pressure in said outlet port, said signal envelope having a lower value corresponding to a vent trigger threshold value and an upper value corresponding to a fill valve trigger threshold value;means for comparing said feedback signal envelope with said reference signal for oputputting a vent trigger signal to open said vent valve whenever said reference signal is below said vent trigger threshold value; andmeans for comparing said feedback signal envelope with said reference signal for oputputting a fill trigger signal to open said fill valve whenever said reference signal is above said fill trigger threshold value.