Alternating current generator for providing three phase and single phase power at different respective voltages

A brushless dynamo electric machine for generating single phase and three phase alternating current output signals at a substantially constant voltage level without requiring a voltage regulator, comprising:

• a generator including a three phase stator winding, a single phase stator winding, and a rotor field winding;
• an exciter including a rotor winding and a field winding;
• first rectifier means for energizing said generator rotor field winding with a direct current signal related to the alternating current signal of said exciter rotor winding;
• and
• second rectifier means for energizing said exciter field winding with a full wave rectified signal proportional to the amplitude of the alternating current in said three phase generator stator winding and with a half wave rectified signal proportional to the amplitude of the alternating current in said single phase generator stator winding, whereby the energization of said exciter field winding is automatically adjusted responsive to whether a load is connected to said three phase stator winding or to said single phase stator winding.

A brushless dynamo electric machine comprising:

• a synchronous generator comprising a first polyphase stator winding including neutral leads, a second stator winding having at least one neutral lead and a different number of phases than said first stator winding, and a single phase rotor field winding;
• a brushless exciter including a rotor winding and cooperating stator control field and compounding field windings;
• rotary rectifier means connected to energize said rotor field winding of the generator with a D.C. voltage derived from an A.C. current in said exciter rotor winding;
• first circuit means including a first rectifier means connected to energize said control field winding to excite said exciter rotor winding for no load voltage regulation of said generator in accordance with the voltage of said first polyphase stator winding;
• and
• second circuit means including second rectifier means connected in series with said neutral leads of said generator stator windings for energizing said compounding field winding in proportion to the amplitude of current in said generator stator windings.

A brushless dynamo electric machine for generating single phase and three phase alternating current output signals at a substantially constant voltage level without requiring a voltage regulator, comprising:

• a generator with a stator having a single phase and a three phase winding and a rotor having a field winding;
• an exciter including a rotor winding, a control field winding and a compounding field winding;
• means for energizing said control field winding and said compounding field winding of the exciter;
• means for energizing said rotor field winding;
• and
• means for adjusting the energization of said exciter compounding field winding.