| 摘要 |
<p>PURPOSE: To improve the low-breakdown-voltage design and excitation current by connecting a switching transistor for controlling an excitation current between the DC output terminal and the excitation terminal of an AC generator and providing a control circuit part for intermittently controlling the switching transistor via an ignition switch. CONSTITUTION: A switching transistor 201 is connected between an output terminal B of an AC generator 1 for vehicle and a field terminal F to intermittently control current flowing to a field coil winding 104 and to keep a generator output voltage to be at a specific value. A base drive transistor 203 intermittently control the base current of the switching transistor 201 and the breakdown voltage is selected equal to or larger than that of the switching transistor 201. By intermittently controlling the field current in a two-stage amplification configuration, the switching transistor 201 reduces ON voltage using a single transistor and increases current flowing to the field coil winding 104 (high excitation effect).</p> |
