Parallel excitation of motor start function for three stage synchronous generator

A system comprising:

• a main generator connected to a motor;
• a permanent magnet generator connected to a generator controller, wherein the permanent magnet generator is mechanically connected to a prime mover;
• wherein the generator controller comprises:
• a rectification circuit coupled to an output of the permanent magnet generator;
• and
• an excitation winding connected to an output of the rectification circuit;
• a direct current (DC) power source connected between an output of the rectification circuit and an input of the excitation winding;
• wherein the generator controller is configured to supply a DC excitation voltage to the excitation winding to regulate the main generator during a plurality of operational modes, wherein the plurality of operational modes comprise a startup mode and a generator mode;
• wherein the DC power source and the rectification circuit are configured to respectively provide a first voltage equal to at least a first portion of the DC excitation voltage and a second voltage equal to at least a second portion of the DC excitation voltage to the excitation windings during the startup mode until the second voltage of the rectification circuit exceeds at least the first voltage provided by the DC power source in the startup mode;
• and
• wherein the rectification circuit is configured to provide an entirety of the DC excitation voltage to the excitation windings during the generator mode after the second voltage provided by the rectification circuit exceeded the first voltage provided by the DC power source in the startup mode.