| 摘要 |
<p>An alternator system according to the present invention can decrease rapidly G-surge voltage appearing when a B-terminal as an output terminal is disconnected. On a rotor 20 constituting a magnetic field, permanent magnets 28 as a second magnetic flux source are disposed in addition to a field coil 24 as a first magnetic flux source. The permanent magnets 28 supply magnetic flux in a direction opposite to magnetic flux supplied by the field coil 24, and an amount of magnetic flux supplied by the permanent magnets 28 is substantially equal to an amount of magnetic flux supplied by the field coil 24. Accordingly, a cross-sectional area of the magnetic circuit in the rotor can be made smaller, and an inductance of the field coil 24 can be made lower. The G-surge voltage can be decreased rapidly because magnetic flux linking with the field coil 24 is rapidly attenuated by the magnetic flux from the permanent magnets 28. <IMAGE></p> |
