| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a condensive load protection device of a self-excited generator which can be configured by using inexpensive devices, as a device for protecting an automatic voltage regulator (AVR) from a back electromotive force generated by armature reaction. <P>SOLUTION: The self-exciting generator 1 including an automatic voltage regulator (AVR) 10 which supplies a current obtained by commutating an output of an excitation winding 3 wound in a generator to be driven by an engine to a field winding 6 according to fluctuation in a generator output voltage includes: a field current control driver 21 which is connected to the field winding 6 in series, and controlled to be ON/OFF by a drive circuit 23 of the AVR 10 to supply a field current to the field winding 6; and a condensive load protecting rotor short-circuit driver 22 which is connected in parallel to the field winding 6, and supplies a short-circuit current to the field winding 6 by being turned ON. A bootstrap circuit 30 is connected as a drive power supply of the field current control driver and the condensive load protecting rotor short-circuit driver. The bootstrap circuit 30 includes a capacitance portion 32 in which charges are accumulated when the field current control driver 21 is ON. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
