Method for operating a multiphase electric machine and corresponding multiphase electric machine
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United States of America Patent
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Sep 6, 2016
Grant Date -
Feb 11, 2016
app pub date -
Mar 14, 2014
filing date -
Mar 22, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
In a method for operating a multiphase electrical machine, which includes a rotor and a rotary encoder operatively connected to the rotor, an actual rotational angle of the rotor is determined from a measured rotational angle determined by means of the rotary encoder and a rotational angle offset. To determine the rotational angle offset the rotor is brought to a specific rotational speed and then an active short circuit of the electrical machine is initiated, wherein an actual current vector is determined, using a dq-transformation, from the current intensities of the currents flowing in at least two of the phases of the electrical machine and the measured rotational angle determined by means of the rotary encoder, and wherein the rotational angle offset is calculated from the actual current vector and a reference current vector.
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