초록 ▼

An excitation apparatus for a generator includes an AC/AC inverter having a voltage holding function and connected to an output line of an AC generator. The apparatus includes an AC/DC converter, a capacitor connected to an output of the AC/DC converter, and a DC/AC converter connected to the capaci

An excitation apparatus for a generator includes an AC/AC inverter having a voltage holding function and connected to an output line of an AC generator. The apparatus includes an AC/DC converter, a capacitor connected to an output of the AC/DC converter, and a DC/AC converter connected to the capacitor and excites a field winding of the generator with an AC/DC converter controllable with a current and connected to the output of the AC/AC inverter. Even when a voltage of the output line is lowered due to a failure in a system, since energy stored in the capacitor is discharged and the voltage is maintained for the time being, the excitation current of the generator can be kept at a sufficiently high value.

대표청구항 ▼

1. An excitation apparatus for a self-excited generator comprising:an AC/AC converter having an input side coupled to an output line of an AC generator and comprising: an AC/DC converter having an input side coupled to the output line of the AC generator, a DC/AC converter having an input side conne

1. An excitation apparatus for a self-excited generator comprising:an AC/AC converter having an input side coupled to an output line of an AC generator and comprising: an AC/DC converter having an input side coupled to the output line of the AC generator, a DC/AC converter having an input side connected to an output side of the AC/DC converter, and a capacitor connected at a first terminal to the output side of the AC/DC converter and to the input side of the DC/AC converter, for storing energy; a thyristor having a gate, the thyristor being connected between an output side of the AC/AC converter and a field winding of the AC generator; a potential transformer coupled to the output line of the AC generator; and a generator voltage adjuster connected between the potential transformer and the gate of the thyristor for controlling switching of the thyristor, the AC/AC converter storing electrical energy that is supplied to the thyristor when voltage on the output line decreases, increasing the current supplied to the field winding to counteract decreasing output line voltage.