초록 ▼

A generator system which is self-excited even during a fault condition includes a main generator having armature windings and a main field winding which is excited by a rotary transformer. The rotary transformer includes a stationary primary winding and a rotating secondary winding, with the primary

A generator system which is self-excited even during a fault condition includes a main generator having armature windings and a main field winding which is excited by a rotary transformer. The rotary transformer includes a stationary primary winding and a rotating secondary winding, with the primary winding receiving a controlled portion of the main generator armature output. The current through the primary winding of the transformer is controlled by silicon controlled rectifiers which are gated by a voltage regulator circuit. The voltage regulator circuit in turn receives signals from the voltage delivered to the load, the highest phase current delivered to the load and the voltage at the main generator armature output. The voltage regulator controls the current through the primary winding of the transformer in accordance with the voltage delivered to the load if that voltage is greater than a predetermined value. If the voltage delivered to the load is less than the predetermined value, such as when a fault condition arises, the current through the primary winding of the transformer is controlled in accordance with the voltage at the main generator armature output. A current limiter is also provided to limit the output current from the main generator armature during a fault condition to maintain the voltage of the generator armature at acceptable levels for self-excitation.

대표청구항 ▼

In a generating system driven by a source of motive power for energizing a load, including means for developing main generator field current, a rotating main generator field winding coupled to the developing means and to the source of motive power for generating a moving main generator magnetic fiel

In a generating system driven by a source of motive power for energizing a load, including means for developing main generator field current, a rotating main generator field winding coupled to the developing means and to the source of motive power for generating a moving main generator magnetic field and a stationary main generator armature disposed in the moving main generator magnetic field for generating main generator output current, the improvement comprising: means for sensing the voltage at the load; means coupled to the load voltage sensing means for detecting when the load voltage is less than a predetermined value; means for sensing the voltage at the main generator armature; and means responsive to the detecting means and coupled to the developing means and the armature voltage sensing means for controlling the main generator field current in response to the sensed voltage at the main generator armature when the sensed voltage at the load is less than the predetermined value.