Method of error detection when controlling a rotating-field motor
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United States of America Patent
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Feb 5, 2013
Grant Date -
Nov 11, 2010
app pub date -
May 10, 2010
filing date -
May 8, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is specified for fault identification when operating a rotating-field motor by means of a pulse-controlled inverter, wherein electromagnetic state variables of the rotating-field motor are determined by means of a mathematical model in space-vector form, and wherein the pulse-controlled inverter is operated electronically using space-vector variables. In this case, the invention provides that, during the operation of the rotating-field motor, the space vector of an uncontrolled state variable of the rotating-field motor is formed, in that the space vector that is formed is analyzed for a spectral component at twice the frequency of the rotating field, and in that, if the spectral component at twice the frequency is present, a partial turns short is deduced in the stator windings.
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