Power breaker
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Apr 18, 2000
Grant Date -
N/A
app pub date -
Aug 29, 1997
filing date -
Nov 8, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power converter circuit arrangement which comprises a first power converter and at least one further power converter is specified. The power converters are connected to the DC voltage intermediate circuit and feed a load circuit, in particular a single-phase railway grid. The or each further power converter has an output transformer on the load side. The secondary windings of the output transformers are connected in series with the primary winding of a load transformer, which feeds the load circuit, and the load-side terminals of a first power converter. This permits the turns ratios of the output transformers to be selected to be greater than or equal to one and said turns ratios between said output transformers to be selected to be gradated in a binary or ternary manner, for example. As a result, power converter stages having a gradated output voltage are available, and a finely stepped approximation to a sinusoidal output voltage can be achieved without the necessity of providing an uneconomically large number of stages.
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