| 摘要 |
The spray gun has a pump piston which is oscillated by a drive comprising a coil and a vibrating armature, coupled to the Al network via a phase chopping control and a selectively switched circuit for halring the network frequency. A suppression circuit (C) incorporates a counter or timer. - The suppression circuit is used for periodic suppression of a given number of half waves of the network AC. The required phase chopping provided by a corresponding phase chopping stage (D). Up to 12 half waves of the network current can be suppressed using between 4 and 8 suppression stages. |
