DRIVE DEVICE FOR ROTATING ELECTRIC MACHINE AND DRIVE METHOD FOR ROTATING ELECTRIC MACHINE
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United States of America Patent
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Issued Date -
Mar 7, 2024
app pub date -
Jun 23, 2023
filing date -
Sep 7, 2022
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Abstract
A drive device for a rotating electric machine having a stator including a stator winding and a rotor including a permanent magnet includes: a power conversion circuit which outputs a phase current to the stator winding; and a control unit which controls the power conversion circuit. If a phase voltage crest value relative to a voltage of DC power is defined as a modulation factor, the control unit decreases a current amplitude and a current advance angle of the phase current if a temperature of the permanent magnet is higher than a predetermined first threshold-value temperature and the modulation factor is larger than a predetermined threshold value, and increases the current amplitude and the current advance angle of the phase current if the temperature of the permanent magnet is higher than the first threshold-value temperature and the modulation factor is smaller than the threshold value.
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