| 摘要 |
<p>PURPOSE:To eliminate a load resistor and a changeover switch by providing a transistor connected at its emitter to a generating coil, and normally short- circuiting a voltage of one polarity of the coil when an SCR is triggered from its collector to turn OFF a lamp. CONSTITUTION:A voltage generated from a generating coil 1 is detected to trigger an SCR 5 connected in parallel with the coil 1 to control a conduction angle for short-circuiting a voltage of one polarity of the voltage generated from the coil 1. In a voltage regulator for limiting the current of a lamp 8 connected between the coil 1 and a ground, a lighting switch 23 is provided between the coil 1 and the lamp 8. Thus, the lamp 8 is turned ON, OFF, a transistor 25 connected at its base to the connecting point of the switch 23 and the lamp 8 and connected at its emitter to the coil 1 is provided. The SCR 5 is triggered from the collector to always short-circuit the voltage of one polarity of the coil 1 when the lamp 8 is turned OFF.</p> |
