Operating a power electronic circuit arrangement having multiple power converters
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United States of America Patent
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-
Dec 28, 1999
Grant Date -
N/A
app pub date -
May 4, 1998
filing date -
May 17, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for operating a power electronic circuit having a first power convertor and at least one second power convertor is specified. The pulse duration-modulated driving of the switches of the circuit arrangement is effected according to a comparison of a reference oscillation with a carrier oscillation. According to the invention, a component of a third harmonic is admixed with the reference oscillation over virtually the entire drive-level range, in particular including low drive-level rates in the range from 20% to approximately 87%. It is also possible to admix a corresponding component of a ninth harmonic in the drive-level range from 20% to approximately 33%. This results in a low clock frequency for the first power convertor and the second power convertor need not have a feedback capability. (FIG. 1)
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