| 摘要 |
A power control circuit for controlling an exciter field of a generator is disclosed. The circuit has an input for receiving an ac input signal and an output for providing a dc output signal for the exciter field. The circuit comprises a thyristor (T Y3) for producing the dc output signal, a thyristor control circuit (28) for controlling the thyristor so as to control the dc output signal, and rectification means (32) for selectively providing full wave rectification of the ac input signal. The circuit is operable in a first mode in which the thyristor control circuit (28) controls the thyristor (TY3) so as to produce a controlled dc output signal, and a second mode in which the ac input signal is full wave rectified and the full wave rectified signal is supplied as the dc output signal. This can allow a large output signal to be provided when required. |
