Electrical power supply system and a permanent magnet generator for such a system

摘要

An electrical power supply system including an engine driven permanent magnet generator ( 11 ) operable to produce a variable voltage and high frequency output which is converted by a series train AC/AC conversion circuit ( 14 ) into a fixed voltage and relatively low frequency AC output for supply through a trip switch ( 56 - 58 ) to an external load ( 53 - 55 ). A bypass circuit including a pair of normally-closed parallel connected oppositely biased thyristors ( 66 - 68 ) is connected between the generator output and the output of the AC/AC conversion circuit ( 14 ).