US 2018/0023529 A1 · AIRCRAFT STARTING AND GENERATING SYSTEM

Abstract

An aircraft starting and generating system includes a starter/generator that includes a main machine, an exciter, and a permanent magnet generator. The system also includes an inverter/converter/controller that is connected to the starter/generator and that generates AC power to drive the starter/generator in a start mode for starting a prime mover of the aircraft, and that converts AC power, obtained from the starter/generator after the prime mover have been started, to DC power in a generate mode of the. A load-leveling unit (LLU) is selectively coupled with a DC power output from the starter/generator and has an inverter/converter/controller (ICC) with an LLU metal oxide semiconductor field effect transistor (MOSFET)-based bridge configuration that supplies DC power to the DC power output in a supply mode, and that receives DC power from the DC power output, in a receive mode. A LLU bridge gate driver is configured to drive the LLU MOSFET-based bridge during a supply mode and a receive mode using bi-polar pulse width modulation (PWM).

Claims20

Dependent claims

An aircraft starting and generating system, comprising:

a starter/generator that includes a main machine, an exciter, and a permanent magnet generator;
a direct current power output from the starter/generator;
a load-leveling unit selectively coupled with the direct current power output and having an inverter/converter/controller having a load-leveling unit metal oxide semiconductor field effect transistor-based bridge configuration and that supplies direct current power to the direct current power output in a supply mode, and that receives direct current power from the direct current power output, in a receive mode;
and
a load-leveling unit bridge gate driver configured to drive the load-leveling unit metal oxide semiconductor field effect transistor-based bridge;
wherein the load-leveling unit bridge gate driver operates to drive the load-leveling unit metal oxide semiconductor field effect transistor-based bridge during the supply mode and the receive mode using bi-polar pulse width modulation.

3 more elements

A method of controlling an aircraft starting and generating system having a starter/generator that includes a main machine having a direct current power output, an exciter, and a permanent magnet generator, a load leveling unit selectively coupled with the direct current power output and having an inverter/converter/controller having a metal oxide semiconductor field effect transistor-based bridge configuration, and a load-leveling unit bridge gate driver configured to drive the metal oxide semiconductor field effect transistor-based bridge, the method comprising:

if in supply mode, selectively coupling the direct current power output with the metal oxide semiconductor field effect transistor-based bridge and supplying power to the direct current power output from the metal oxide semiconductor field effect transistor-based bridge by driving the metal oxide semiconductor field effect transistor-based bridge during supply mode using bi-polar Pulse Width Modulation;
and
if in receive mode, selectively coupling the direct current power output with the metal oxide semiconductor field effect transistor-based bridge and receiving power from the direct current power output to the metal oxide semiconductor field effect transistor-based bridge by driving the metal oxide semiconductor field effect transistor-based bridge using bi-polar pulse width modulation.

Dependencies are inferred from the claim text.

Aircraft starting and generating system

Life of this patent

Aircraft starting and generating system

Life of this patent

Abstract

Claims20