US 7,078,826 B2 · Hybrid gas turbine engine starter-generator

Abstract

A rotating electrical machine, such as an aircraft starter-generator, that may be operated in either a DC motor mode or an AC generator mode. The machine includes a conventionally wound main stator that is selectively configurable as a multi-pole AC stator and a multi-pole DC stator. The machine also includes rotor windings that are configured to be selectively coupled to either an exciter or a plurality of commutator segments, and DC brushes that are selectively moveable into, and out of, electrical contact with the commutator segments, to thereby electrically couple and decouple a DC power source to and from, respectively, the rotor windings.

Claims15

Dependent claims

A gas turbine engine starter-generator, comprising:

a housing;
a main rotor rotationally mounted within the housing;
and
a main stator mounted within the housing and at least partially surrounding at least a portion of the main rotor, the main stator selectively configurable as an M-pole AC stator or an N-pole DC stator, M and N each integers greater than one,
wherein:
when the main stator is configured as the M-pole, multi-phase AC stator, each phase consists of two or more stator winding circuits electrically coupled in parallel with one another, and
when the main stator is configured as the N-pole DC stator, the stator winding circuits associated with each phase are directly connected in series with one another.

4 more elements

Dependencies are inferred from the claim text.

Hybrid gas turbine engine starter-generator

Life of this patent

Hybrid gas turbine engine starter-generator

Life of this patent

Abstract

Claims15