Converter circuit with half-periods of an odd number of...

Details Converter circuit with half-periods of an odd number of... Converter circuit with half-periods of an odd number of...

H - Electricity

02

M

321/98

H02M 7/155 (2006.01) H02M 7/162 (2006.01) H02M 7/19 (2006.01)

Patent

CA 1157520

- 1 - ABSTRACT OF THE DISCLOSURE An electrical converter equipment comprises a phase- angle controlled static converter connected to an alter- nating voltage source, the converter having a by-pass path for the direct current and being arranged to supply a d.c. load. The converter has control means controlling the direct voltage of the converter by influencing the control angle. The control means operate cyclically. Each cycle consists of an odd number, but at least three, of full periods and the converter is controlled during two of the half-periods of the cycle with a variable control angle and during the other half-periods of the cycle with a fixed control angle which, for each of these half-periods, is preferably about 0° or about 180°. The half-periods during which the converter is controlled with a variable control angle are equidistant, that is, the time interval between them ls equal to half the length of the cycle.

349379

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