| 摘要 |
PURPOSE:To indirectly detect temperature rise of discharge coil and prevent burning of coil by charging a capacitor during the one-shot pulse period obtained by the changing signal of the primary switch and thereby detecting a terminal voltage of the constant level. CONSTITUTION:An auxiliary relay 11 and an ON-delay timer 12 are driven by the normally closed contact 10 of the primary switch of capacitor apparatus and an auxiliary relay 15 is driven by the AND condition of normally closed contacts 13, 14 of the relay 11 and timer 12. Meanwhile, the capacitor 17 forms a charging circuit through a variable resistor 18 and a normally opened contact 19 of relay 15 with a DC voltage E0 of the DC power supply DC divided by a dividing variable resistor 16 and the capacitor 17 forms a discharge circuit through a resistor 18 with a normally closed contact 20 of the relay 15. A voltage detection relay 21 which detects that a terminal voltage becomes a constant level is connected to the terminal of capacitor 17 and a contact output of such relay is outputted as a temperature rise detection signal of discharge coil.
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