Multiple coil electric generator in turbine engine

A method comprising:

• receiving, at a first rotating element of an electric generator of a turbine engine, via a first gearbox coupled to a drive shaft of the turbine engine, first mechanical power to cause the first rotating element to rotate at a first angular velocity and at a tangential velocity relative to a first coil array of the electric generator;
• receiving, at a second rotating element of the electric generator, via a second gearbox coupled to the drive shaft, second mechanical power to cause the second rotating element to rotate at a second angular velocity and at the tangential velocity relative to a second coil array of the electric generator, the first angular velocity being different than the second angular velocity, wherein a distance from the first rotating element to the drive shaft is longer than a distance from the second rotating element to the drive shaft;
• generating, at the first coil array and based on the first mechanical power, first electrical current;
• generating, at the second coil array and based on the second mechanical power, second electrical current;
• and
• outputting, by an electrical output element of the electric generator, to an electrical load, the first electrical current and the second electrical current.

A turbine engine comprising:

• a drive shaft;
• a first gearbox;
• a second gearbox;
• and
• an electric generator comprising:
• a first rotating element comprising a first magnet array and mechanically coupled to the drive shaft by at least the first gearbox;
• a second rotating element comprising a second magnet array and mechanically coupled to the drive shaft by at least the second gearbox, wherein a distance from the first rotating element to the drive shaft is longer than a distance from the second rotating element to the drive shaft;
• and
• an armature comprising a first coil array and a second coil array,
• wherein the first coil array is configured to produce a first alternating-current (AC) electrical current having a particular frequency and a particular phase,
• the second coil array is configured to produce a second AC electrical current having the particular frequency and the particular phase of the first AC electrical current,
• wherein each magnetic element of the first magnet array is configured to pass over a respective coil element of the first coil array concurrently with each magnetic element of the second magnet array passing over a respective coil element of the second coil array,
• wherein the first gearbox is configured to cause the first rotating element to rotate at a first angular velocity and at a tangential velocity relative to the first coil array, and
• wherein the second gearbox is configured to cause the second rotating element to rotate at a second angular velocity and at the tangential velocity relative to the second coil array, the first angular velocity being different than the second angular velocity.