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US 2004/0105199 A1Published application
Charging circuit for a frequency converter
AssigneeDr. Johannes Heidenhain GmbH
InventorsNorbert Huber, Franz Ritz
Life of this patent
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Abstract
A charging circuit for a frequency converter having a first feed line with a first constant current source therein and a second feed line with a second constant current source therein. An intermediate circuit capacitor connected between the first feed line and the second feed line, wherein the first constant current source that limits a charging current of the intermediate circuit capacitor. An electronic control device that controls both the first constant current source and the second constant current source in parallel.
Claims10
A charging circuit for a frequency converter, comprising:
- a first feed line comprising a first constant current source therein;
- a second feed line comprising a second constant current source therein;
- an intermediate circuit capacitor connected between said first feed line and said second feed line, wherein said first constant current source that limits a charging current of said intermediate circuit capacitor;
- and
- an electronic control device that controls both said first constant current source and said second constant current source in parallel.
2 more elements
Dependencies are inferred from the claim text.