초록 ▼

The invention is a two-level power system for electrically powered aircraft sub-systems. An aircraft engine (2) drives a three phase generator (30) at a variable speed. The output of generator (30) is primary variable-voltage/variable-frequency (VV-VF) power which is utilized by various aircraft sub

The invention is a two-level power system for electrically powered aircraft sub-systems. An aircraft engine (2) drives a three phase generator (30) at a variable speed. The output of generator (30) is primary variable-voltage/variable-frequency (VV-VF) power which is utilized by various aircraft subsystems. A portion of the primary VV-VF power is converted to constant voltage-constant frequency (CV-CF) power by an inverter (31) which includes front end rectification. The CV-CF power is then available to selected aircraft subsystems while portions of the CV-CF power are converted by rectifier (32) and transformer-rectifier (33) into 270 vdc and 28 vdc power, respectively, which power is also then available to aircraft sub-systems.

대표청구항 ▼

In an aircraft having at least one variable speed engine first electricity driven subsystems and devices including fuel pumps, electrohydraulic pumps, electric-galley, de-icing, and environmental control subsystems, and second electrically driven subsystems and devices including solenoids, control v

In an aircraft having at least one variable speed engine first electricity driven subsystems and devices including fuel pumps, electrohydraulic pumps, electric-galley, de-icing, and environmental control subsystems, and second electrically driven subsystems and devices including solenoids, control valves, shut-off valves, indicators, lamps and instruments, the improvement comprising: generator means associated with and adapted to be driven by said at least one aircraft engine continuously and at variable speeds, said generator means being further adapted for generating primary variable-voltage/variable-frequency power to said first electrically driven subsystems and devices; and means associated with said primary power generating means for converting a minor portion of said primary variable-voltage/variable-frequency power to conditioned secondary power for said second electrically driven subsystems and devices.