US 5,510,695 A · Power generation control system for generator

Abstract

A power generation control system for a generator is provided with a smoothing circuit, a voltage control circuit and an exciting current control circuit including a delaying circuit. When a terminal voltage of a smoothing capacitor is higher than a first reference voltage of a first comparator, a switching element is closed to supply current to an exciting coil. When a divided voltage of a voltage detecting circuit is lower than a second reference voltage of a second comparator, the smoothing capacitor is charged so that the terminal voltage thereof is gradually raised. When a detection voltage of the exciting current control circuit is higher than a third reference voltage of a third comparator, the smoothing capacitor is rapidly discharged so that the terminal voltage thereof is rapidly lowered down to a value not higher than the first reference voltage of the first comparator. Thereafter, the smoothing capacitor is charged again, in a manner as mentioned above, so that the terminal voltage thereof is gradually raised.

Claims10

Dependent claims

A power generation control system for a generator comprising:

switching means connected to an exciting coil of a generator provided with said exciting coil and an armature coil, said switching means being switched in accordance with a terminal voltage of a smoothing capacitor so as to control an exciting current to said exciting coil;
voltage control means for detecting a generation voltage generated at said armature coil, and for charging said smoothing capacitor in accordance with said detected generation voltage, said voltage control means controlling an operation of said switching means to thereby control said generation voltage generated at said armature coil to a target value;
and
exciting current control means for detecting said exciting current, for discharging said smoothing capacitor and controlling an operation of said switching means to cut-off said exciting current to said exciting coil when said detected exciting current exceeds a predetermined current value, said exciting current control means having precedential control of said switching means over said voltage control means.

1 more element

A power generation control system for a generator comprising:

switching means connected to an exciting coil of a generator provided with said exciting coil and an armature coil, said switching means one of a supply and a cut-off of an exciting current to said exciting coil;
voltage control means comprising:
means for detecting a generation voltage generated at said armature coil,
a smoothing capacitor to smooth said detected generation voltage by charging and discharging said smoothing capacitor in accordance with said detected generation voltage, and
a first comparator to compare a terminal voltage of said smoothing capacitor and a first predetermined voltage, said switching means being opened and closed in accordance with an output of said first comparator, to thereby control said generation voltage to become a target value;
and
exciting current control means for detecting said exciting current by a current detecting element, for performing one of charging and discharging said smoothing capacitor when said detected exciting current exceeds a predetermined current value to thereby cause said switching means to cut-off said exciting current to said exciting coil, said exciting current control means having precedential control of said switching means over said voltage control means.

4 more elements

Dependencies are inferred from the claim text.

Power generation control system for generator

Life of this patent

Power generation control system for generator

Life of this patent

Abstract

Claims10