Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter
Patent
1984-04-03
1986-03-25
Beha, Jr., William H.
Electric power conversion systems
Frequency conversion without intermediate conversion to d.c.
By semiconductor converter
318810, 363165, H02M 5257
Patent
active
045787468
ABSTRACT:
In a static frequency changer controlled by adjusting the time of conduction of the bilateral switching units forming static converters, the time of conduction is split into n time intervals of respective subdurations adding up to be equivalent to the effective time of conduction of the controlled switching unit, and such subdurations are spread and distributed throughout the time period of control of the switching unit both within the original switching pattern of each converter and between the effective times of conduction of the respective converters, thereby to minimize harmonic distortion of the input supply current of the frequency changer.
REFERENCES:
patent: 3470447 (1969-09-01), Gyugyi et al.
patent: 3493838 (1970-02-01), Gyugyi et al.
patent: 3967173 (1976-06-01), Stich
patent: 4047083 (1977-09-01), Plunkett
patent: 4337429 (1982-06-01), Stuart
patent: 4488216 (1984-12-01), Gyugyi et al.
Gyugyi et al., "Static Power Frequency Changers", pp. 5-14 and 363-383, John Wiley & Sons, 1976.
Cho Gyu-Hyeong
Gyugyi Laszlo
Heinrich Theodore M.
Beha Jr. William H.
Lorin C. M.
Sterrett Jeffrey
Westinghouse Electric Corp.
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