| 摘要 |
<p>PURPOSE:To prevent the rotating speed of an engine from dropping by switching the characteristic of an alternator in a range from idling to accelerator depressing by the variation in a field, thereby suppressing the variation in the output characteristics in the idling range. CONSTITUTION:An output from one phase of a stator coil 1 of an alternator used for an automobile or the like is applied into a regulator 2 in the voltage waveform of rectified half-wave to be used for discriminating the rotating speed, a resistor R inserted into a field coil 6 is controlled to vary the intensity of a magnetic field. The regulator 2 forms the input in a rectangular shape via a waveform shaper 3, compared by a comparator 5 with the reference rotating speed N1 through an F/V converter 4, a transistor TR1 is controller to turn ON or OFF the resistor R. Accordingly, the abrupt rise of the reference rotating speed N1 can be performed between the idling range and the maximum saturated output range, thereby suppressing the variation in the output characteristic.</p> |
