Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter
Patent
1997-06-25
1999-03-23
Riley, Shawn
Electric power conversion systems
Frequency conversion without intermediate conversion to d.c.
By semiconductor converter
363 65, H02M 5257
Patent
active
058868933
ABSTRACT:
A portable power unit has a magneto generator having three-phase output windings. A synchronizing signal is formed in synchronism with an output frequency of the magneto generator. A pair of variable control bridge circuits are connected to the three-phase output windings and connected in antiparallel connection to each other to form a cycloconverter for generating a single-phase alternating current having a desired frequency to be supplied to a load. A bridge drive circuit is responsive to the synchronizing signal from the synchronizing signal-forming circuit, for causing the pair of variable control bridge circuits to be alternately switched to operate every half a repetition period of the single-phase alternating current, to thereby cause the cycloconverter to generate the single-phase alternating current. An output voltage-detecting circuit detects an output voltage of the pair of variable control bridge circuits. An output voltage-adjusting circuit compares the output voltage detected by the output voltage-detecting circuit with a desired voltage to thereby control the bridge drive circuit in a manner such that the output voltage of the pair of variable control bridge circuits is maintained substantially at a fixed value.
REFERENCES:
patent: 3654541 (1972-04-01), Kelly, Jr. et al.
patent: 4084220 (1978-04-01), Akamatsu
Asai Koichi
Shimizu Motohiro
Honda Giken Kogyo Kabushiki Kaisha
Riley Shawn
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