Direct AC/AC converter system

Details Direct AC/AC converter system Direct AC/AC converter system

1988-08-31

1989-05-23

Beha, Jr., William H.

Electric power conversion systems

Frequency conversion without intermediate conversion to d.c.

By semiconductor converter

318807, 363160, 363163, H02M 522

Patent

active

048335886

ABSTRACT:
In a direct AC to AC converter system the normal rectifier assistance functions are phase modulated by a 30.degree. lag and by a 30.degree. lead, and switching between lagging and leading function is effected at a high frequency according to a duty cycle: ##EQU1## and where .theta. is the electrical angle of the AC power supply, thereby insuring a sinusoidal input current in the system.

REFERENCES:
patent: 4468725 (1984-08-01), Venturini
patent: 4642751 (1987-02-01), Schauder
patent: 4648022 (1987-03-01), Schauder
patent: 4675802 (1987-06-01), Sugimoto
Ziogas, Khan and Rashid, IEEE Transactions, vol. IA-21, Sep./Oct. 1985 pp. 1242-1253.
Ziogas, Khan and Rashid, IEEE Transactions, vol. IE-33, Aug. 1986 pp. 271-280.
Jose Rodriguez, IEEE IAS 1984, pp. 820-825.
Kastner and Rodrigues, 16-18 Oct. 1985 (Proceedings vol. 1 pp. 1.141-1.146), Brussels.

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