Machine having electrical power system and method

A machine comprising:

• a frame;
• an engine mounted to said frame;
• a generator configured to generate electrical power for said machine and coupled with said engine, said generator having a speed range that includes a resonance speed associated with resonance vibrations of at least one of said engine and said generator;
• and
• a drive coupling configured to transmit torque between said engine and said generator, said drive coupling being further configured to allow non-oscillatory relative rotation between said engine and said generator when said generator is rotated at said resonance speed.

A method of operating a machine system comprising the steps of:

• rotating a generator of the machine system with an engine of the machine system, the generator having a speed range that includes a resonance speed associated with resonance vibrations of the machine system;
• generating resonance vibrations of the machine system by rotating the generator at the resonance speed;
• and
• inhibiting transmitting resonance vibrations between the generator and the engine, including allowing relative rotational slip within a drive coupling disposed between the engine and the generator when the generator is rotated at the resonance speed.