Aircraft turbine start from a low voltage battery

Details Aircraft turbine start from a low voltage battery Aircraft turbine start from a low voltage battery

1989-12-15

1991-07-30

Stephan, Steven L.

Electricity: single generator systems

With physical starting and/or stopping of the generator

322 29, 363 96, F02N 1100

Patent

active

050362674

ABSTRACT:
A low voltage battery provides the power source for energizing an aircraft generator to operate it as a motor during a starting operation. The battery is coupled to an input to an inverter whose a.c. output is controlled by a pulse width modulator. By controlling the switching points of the output, the generator is so energized that it operates as a brushless d.c. motor. At a point where the available voltage to the generator is insufficient to further accelerate the turbine, even with field weakening and an increased commutation angle, an autotransformer is switched into the system to step up the output voltage from the invertor. Throughout the starting operation the commutation angle is controlled so that current drain on battery is such that the battery terminal voltage at one half its no load terminal voltage, thus providing maximum power transfer from the battery.

REFERENCES:
patent: 3820006 (1974-06-01), Phillips
patent: 3908130 (1975-09-01), Lafuse
patent: 3939392 (1976-02-01), Chalmers et al.
patent: 4330743 (1982-05-01), Glennon
patent: 4489323 (1984-12-01), Glennon et al.
patent: 4775924 (1988-10-01), Sweezy
patent: 4786852 (1988-11-01), Cook
patent: 4841216 (1989-06-01), Okada et al.

Affiliated with

Also associated with

Rating

Aircraft turbine start from a low voltage battery does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aircraft turbine start from a low voltage battery, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aircraft turbine start from a low voltage battery will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1544541