Generator arrangements and methods of generating electric power with generator arrangements

A method of generating power, comprising:

• at a generator arrangement including a housing with a mounting feature, a main generator with an outboard shaft arranged within the housing and axially offset from the mounting feature along a rotation axis, and a permanent magnet generator with an inboard shaft arranged within the housing between the main generator and the mounting feature, the outboard shaft coupled to the inboard shaft;
• receiving mechanical rotation at the inboard shaft of the permanent magnet generator;
• driving the main generator through the permanent magnet generator by rotating the outboard shaft of the main generator with the inboard shaft of the permanent magnet generator;
• providing a coolant and/or lubricant to the permanent magnet generator via a permanent magnet generator coolant circuit arranged within the housing;
• and
• providing a coolant and/or lubricant to the main generator via a main generator coolant circuit arranged within the housing, the main generator coolant circuit being fluidly isolated from the permanent magnet generator coolant circuit.