Frequency converters

Details Frequency converters Frequency converters

1978-09-07

1980-09-30

Shoop, William M.

Electric power conversion systems

Frequency conversion without intermediate conversion to d.c.

By semiconductor converter

363 43, 363 71, H02M 5257

Patent

active

042259142

ABSTRACT:
In a frequency converter of the type including a polyphase inverter which produces polyphase alternating current inherently containing higher harmonic components, a plurality of polyphase inverters are operated with a predetermined phase difference and the outputs thereof are sythesized by polyphase transformer means so as to eliminate higher harmonic components of relatively low orders, particularly the fifth and seventh higher harmonics.

REFERENCES:
patent: 3324374 (1967-06-01), Corey
patent: 3477010 (1969-11-01), VeNard
patent: 3638094 (1972-01-01), VeNard
patent: 3979662 (1976-09-01), Klein
"Dual Current Source Converter for AC Motor Drives", IEEE, 1977, Society Annual Meeting, pp. 758-768, R. Palaniappan & J. Vithayathil.

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