Solid state frequency converter capable of misaligned parallel o

Details Solid state frequency converter capable of misaligned parallel o Solid state frequency converter capable of misaligned parallel o

1993-03-11

1994-10-11

Stephan, Steven L.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Diverse or unlike electrical characteristics

307 44, H02J 306

Patent

active

053550242

ABSTRACT:
A ground power unit capable of no-break power transfer includes a rectifier for converting power from commercial mains to direct current, a switching circuit, a power transformer, and a pattern generator for controlling the operation of the switching circuit. Voltage and current sensors monitor whether the phase of the ground power unit is leading or lagging the phase of the aircraft power bus at the tinge of power transfer. The frequency and phase of the pattern generator converter is adjusted to bring the two systems into alignment quickly, well before the power transfer operation is completed. The ground power unit limits the power transfer between the two systems to prevent the overloading of either.

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patent: 5060131 (1991-10-01), Sikora

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