Electrical power system for a vehicle

A vehicle, comprising:

• a vehicle body;
• one or more electrical loads positioned onboard the vehicle body;
• a gas turbine engine mounted to the vehicle body, the gas turbine engine having at least two spools;
• and
• a power system, comprising:
• a first power subsystem having a first electric machine mechanically coupled with a high pressure spool and a second electric machine mechanically coupled with a low pressure spool, the second electric machine being electrically coupled with the first electric machine such that electrical power is transmittable therebetween;
• and
• a second power subsystem having a third electric machine mechanically coupled with the low pressure spool, the third electric machine being electrically coupled with the one or more electrical loads such that electrical power is transmittable therebetween, and wherein the first power subsystem and the second power subsystem are electrically decoupled from one another.

A method of vehicle power transmission, comprising:

• transferring, by a first power subsystem, power between high pressure spool and a low pressure spool of a gas turbine engine by transmitting electrical power generated by a first electric machine mechanically coupled with the high pressure spool to a second electric machine mechanically coupled with the low pressure spool;
• and
• transmitting, by a second power subsystem, electrical power generated by a third electric machine mechanically coupled with the low pressure spool to one or more loads positioned offboard the gas turbine engine, and
• wherein the first power subsystem and the second power subsystem are electrically decoupled from one another.