| 摘要 |
The spark generator (10) includes a spark transformer 16, an energy storage capacitor 20 connected across an AC supply from terminals (11, 12), and an SCR (25) connected across the transformer capacitor circuit for discharging the capacitor and generating a spark (at 18). The transformer capacitor circuit is connected to the AC supply in series with diode circuit 31 through which the capacitor is charged to the peak voltage of the AC supply and the diode circuit is shunted by an SCR firing control circuit (21, 33, 28) through which current flows when the voltage across the diode circuit reverses to fire the SCR during the same half cycle as the capacitor is charged in.
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