| 摘要 |
<p>PURPOSE:To readily establish a voltage with a simple structure by connecting a positive temperature coefficient thermosensitive resistance element in parallel with a field current controller. CONSTITUTION:When an AC generator 10 is started, a weak voltage is induced in the generator 10 by the remaining magnetic field of a field 18. Since a positive temperature coefficient thermosensitive resistance element 36 has very small resistance value at the ambient temperature, a current is flowed to the field 18 and the element 36 even if the output terminal voltage of a rectifier 16 is ultrafine, thereby increasing the output voltage V of the generator 10. If the output voltage V becomes the voltage or higher required for operating a controller 34, the controller 34 starts operating, and a field current is controlled to hold the prescribed voltage. On the other hand, the element 36 is self-heated by the flowing current to abruptly increase the resistance. Thus, a current is not almost flowed to the element 36. Thus, the voltage is reliably established readily.</p> |
