手持喷涂设备的高压静电电源设计

摘要

目前一些运用喷涂工艺的小公司没有专门的高压输送线路，因此生产的产品瑕疵较多，手持喷涂设备很好的解决这一问题。由于其喷枪与工件之间需要一个强静电场，为此设计了一种直流高压静电电源。电源硬件部分主要采用PWM控制方式改变开关管的导通与关闭时间比率，从而实现输出电压大小的可控性。输出电压可控范围0~10kV左右，最小调节量为1 kV，误差为±500 V，输出电流在16μA左右。检测显示电路依靠A/D转换与分压反馈可测量电压的大小并在液晶屏上显示，还能够绘制电压的实时变化曲线，以便对负载阻态的变化进行实时地观察。用高压电表对该装置的输出端进行测量，结果表明，该装置的输出端确实产生了可控的高电压小电流的"静电"。若以本装置产生的高压静电作用于喷涂枪与工件之间，其喷涂的效果将尤为明显。%At present, some small companies do not need to spray a special high-voltage transmission line, So many products are defective, hand-held spraying equipment good solution to this problem, because of the need for a strong electrostatic field between the gun and the workpiece which, for the design of a DC high voltage electrostatic power.The hardware device changes the duty cycle by PWM control mode,controlling the output voltage magnitude.Controllable output voltage is range of about 0~10 kV. The minimum adjustment amount is 1kV.The error is ± 500V.The output current is about 16uA.Detection and display circuit can measure and display the value of output voltage and display the dynamic currved.The measurement of high voltage meter shows that the device did generate the controllable "electrostatic" which has high-voltage and low-current.In terms of high-voltage electrostatic interaction between this deviceve of it in real time rely on the A/D conversion and the feedback of divided voltage. The real-time state of load can be easily obse generates spray gun and the workpiece, its effect will be particularly evident spraying.