Method and apparatus for control of static valve converter

Details Method and apparatus for control of static valve converter Method and apparatus for control of static valve converter

1978-01-24

1980-06-17

Shoop, William M.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

363 96, H02M 700

Patent

active

042087074

ABSTRACT:
A method for control of a static valve converter consists of determining the difference between the actual and desired control pulse phases by the use of an equidistant pulse sequence, the frequency of which being equal to the coversion frequency, the pulse sequence phase being selected so that the mean difference between the equidistant pulse phase and the phase of the respective control pulses of all valves is equal to zero, and the pulse phase difference being determined for each individual valve. A control pulse automatic balancing unit incorporated in an apparatus for realizing the method of the present invention comprises an equidistant pulse sequence assembly, a shaping element, correcting signal circuits and logical AND elements equal in number to the number of conversion phases, and also logical circuits equal in number to the number of coversion phases. Each logical circuit comprises two logical AND elements, and a logical OR element connected to the outputs of the AND elements.

REFERENCES:
patent: 3582755 (1971-06-01), Liss et al.

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