Current conversion device for a single- or multi-axis arrangement and operating method
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United States of America Patent
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Oct 31, 2017
Grant Date -
Jun 11, 2015
app pub date -
Dec 10, 2014
filing date -
Dec 11, 2013
priority date (Note) -
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Abstract
For operating multi-axis drive assemblies more reliably even in a field weakening range, a current conversion device is proposed which includes a voltage-source DC link, a plurality of inverters having each a DC input side connected to the voltage-source DC link and AC output-side terminals for connection to an electric motor, and a control device configured to short-circuit each of the inverters. A measurement device measures an electrical variable at each of the inverters. The control device determines based on the measured electrical variables independently for each of the inverters directly or indirectly whether a particular inverter is feeding energy into the voltage-source DC link, and short-circuits, when this is the case, the particular inverter independently of the other inverters. A corresponding operating method is also disclosed.
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