| 摘要 |
<p>PURPOSE:To stabilize voltage induced to the secondary side of a transformer, by setting a switching means for short-circuiting two input terminals among the three terminals of connection on the primary side of the transformer of -Y connection. CONSTITUTION:A power MOSFET 3 is turned ON/OFF by a controlling circuit 4, and DC voltage from a rectifier 2 is fed to a field coil 1a of a generator 1. By the controlling circuit 4, the output of the pulse signal of a duty factor according to a difference between a voltage setting value and the output of a voltage detecting transformer 5 is directed to the gate of the power MOSFET 3. The voltage detecting transformer 5 is composed as a transformer of -Y connection, and between the terminals V and W among the input terminals U, V, W on its primary side, a switch 7 as a switching means is provided. When a single-phase self-excited synchronous generator is used as the generator 1, then the contact of the switch 7 is closed.</p> |
