A Detailed Power Inverter Design for a 250 Kw Switched Reluctance Aircraft Engine Starter/Generator

Document Number: 931388

Date Published: April 1993

Author(s):
Arthur Radun - CE Corporate Research and Development
Eike Richter - GE Aircraft Engines

Abstract:
The design results for a 250 kW switched reluctance aircraft engine starter/generator system power inverter are presented. The starter/generator employs a single switched reluctance machine and a generating system architecture that produces two separate 270 Vdc buses from that single switched reluctance machine. The machine has six phases with three of the phases connected to one inverter supplying 125 kW to one 270 Vdc bus while the other three phases are connected to a second inverter supplying 125kW to the other 270 Vdc bus. Each bus has its own EMI filter and control in addition to its own inverter. Two types of inverters have been developed, one type employs MOS controlled thyristors (MCTs) for the controlled switches and the other type employs insulated gate bipolar transistors (IGBTs). High current 500 A peak turn-off MCT modules were specifically developed for the MCT inverters. Two of these modules are placed in parallel to form the required 1000 A switches. Safe operating area issues and special considerations related to employing the MCT switches are described. The IGBT inverters use two commercial 400 A 600 V IGVT modules for each switch. The link capacitor bank for each inverter employs multilayer ceramic capacitors to meet the starter/generators temperature requirements. These same multilayer ceramic capacitors are also used in the EMI filters. Performance predictions and results for both inverters are presented.

File Size: 2071K
Product Status: In Stock

See other papers presented at Aerospace Atlantic Conference & Exposition, April 1993, Dayton, OH, USA, Session: Aerospace Atlantic Conference & Exposition

Purchase more technical papers and save! With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay. Learn more >