Patent ID: 7970497

Claim:
A hybrid electric and bleed system for a vehicle, comprising: an environmental control system (ECS) having a pressurization circuit and a cooling circuit, the pressurization circuit providing air near cabin pressure, the cooling circuit rejecting heat and water from the air outside a pressure vessel and the ECS configured to be powered by mechanical power from pressurized bleed air and by electrical power through an electric motor; an electric system having at least one engine driven starter-generator, at least one auxiliary power unit driven starter-generator, at least one main AC bus, and at least one variable voltage of variable frequency bus, wherein the main AC bus receives alternating current from the engine driven starter-generator or the auxiliary power unit driven starter-generator in a generation mode; the variable voltage of variable frequency bus receives variable voltage of variable frequency either from a DC bus through at least one inverter/motor controller or from the main AC bus through at least one matrix converter, and the variable voltage of variable frequency bus supplies power to start the engine driven starter-generator or the auxiliary power unit driven starter-generator.