Circuit arrangement including a number of converters, in particu

Details Circuit arrangement including a number of converters, in particu Circuit arrangement including a number of converters, in particu

1975-03-24

1976-07-20

Shoop, William M.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

321 5, 321 9R, 321 27R, 318227, H02M 545

Patent

active

039709140

ABSTRACT:
A circuit arrangement is disclosed comprising three direct converters which are fed from an a.c. voltage network. The converters are arranged in a Y configuration and are connected to a three-phase load. To increase the transmitted power and to vary the reactive power requirement, the circuit arrangement is provided with means for generating a control voltage for the control unit of at least one of the three converters such that the output voltage of this converter has a periodic waveform which includes essentially no fifth and seventh order harmonics. Additionally, the load-side conductor currents of the three converters are controlled with control signals having sinusoidal waveforms. A particular form used for the control voltage is a trapezoidal waveform.

REFERENCES:
patent: 3274482 (1966-09-01), Depenbrock
patent: 3332002 (1967-07-01), Jollois
patent: 3539901 (1970-11-01), Rosenberry, Jr. et al.
patent: 3622859 (1971-11-01), Williamson
patent: 3659168 (1972-04-01), Salihi et al.
patent: 3702429 (1972-11-01), Sawyer et al.

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