US 7,687,928 B2 · Dual-structured aircraft engine starter/generator

Abstract

An aircraft starting and generating system includes a first starter/main machine assembly that includes a first exciter and a first main machine, and second starter/main machine assembly that includes a second exciter and a second main machine. The system also includes a permanent magnet generator (PMG) that is connected to the first and second starter/main machine assemblies. The system further includes a first inverter/converter/controller (ICC) that is connected to the first starter/main machine assembly and to the PMG, and a second ICC that is connected to the second starter/main machine assembly and to the PMG. The first and second ICCs generate AC power to respective drive the first and second starter/main machine assemblies in a start mode of the starting and generating system for starting a prime mover of the aircraft, and the first and second ICCs convert AC power, respectively obtained from the PMG after the prime mover has been started, to DC power in a generate mode of the starting and generating system.

Claims18

Dependent claims

An aircraft starting and generating system, comprising:

a first starter/main machine assembly that includes a first exciter and a first main machine;
a second starter/main machine assembly that includes a second exciter and a second main machine;
a permanent magnet generator (PMG) that is connected to the first and second starter/main machine assemblies;
a gear train provided between the first main machine and the PMG and between the second main machine and the PMG, the gear train providing a speed increasing function;
a first inverter/converter/controller (ICC) that is connected to the first starter/main machine assembly and to the PMG;
and
a second ICC that is connected to the second starter/main machine assembly and to the PMG,
wherein the first and second ICCs generate AC power to respectively drive the first and second starter/main machine assemblies in a start mode of the starting and generating system for starting a prime mover of the aircraft, and
wherein the first and second ICCs convert AC power, respectively obtained from the PMG after the prime mover has been started, to DC power in a generate mode of the starting and generating system.

6 more elements

Dependencies are inferred from the claim text.

Dual-structured aircraft engine starter/generator

Life of this patent

Dual-structured aircraft engine starter/generator

Life of this patent

Abstract

Claims18