| 摘要 |
A powder spray coating discharge assembly (230, 260, 216, 228, 232) for c onnection to an electrostatic spray coating gun (210), the gun (210) having a gun body (212), means for connecting to a supply of coating powder and mea ns for supplying a voltage (20) at first and second potentials respectively to first (292) and second electrical connections (294) each for connection t o a respective one of a discharge electrode (232) and a counter electrode (2 60), the means for supplying the voltage (20) comprising: a variable voltage power supply (1 14) having an input connected to an electrical power source (110), an output connected to each of the first and second electrical conne ctions (292, 294), a control circuit (128) for controlling the variable volt age power supply (20) and means (120) for sensing an output load, wherein th e control circuit (128) is adapted to adjust the variable voltage power supp ly (20) to reduce the voltage and current in proportion to a sensed increase in load, or vice-versa.
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