Project Title:

Ultra-High-Temperature 20 kHz Induction Generator for VSCF Operating Mode

10.01-2520
Ultra-High-Temperature 20 kHz Induction
	Generator for VSCF Operating Mode
Power Silicon and Monolithic Technologies Corp.
750 Braddock Avenue
East Pittsburgh, PA 15112
Stephen Kuznetsov  (301-656-2520)
LeRC -- NAS3-25350

Abstract:

	 A high-temperature, brushless, electrical generator for 20 kHz space power systems
uses an azimuthal-cascaded, internally excited induction machine (IEIG) operating
at 44,000 rpm maximum shaft speed. The upper operating temperature for the rotor
is 400 C. The module provides a constant frequency output at variable turbine input
speeds. A distinct advantage of the IEIG is the inherent reliability of the rotor
construction and direct stator output. The IEIG rotor is a solid forging of Hiperco
27 magnetic steel with an Inconel 718 and copper containment shell; no permanent
magnets or saliency effects are used. The rotor is continuously magnetized by the
dc component of induced current established by the "exit-edge" effect. In Phase I,
a 15 kVA IEIG unit was fabricated. Assembly and testing were incomplete as of this
writing.

Potential Commercial Application:

Potential Commercial Application: Applications are in high-specific-density electrical
generators for mobile use and adaptation to commercial aircraft generators.