MOTOR SYSTEM

摘要

A motor system comprises a motor (3), wherein the ratio of the number of armature magnetic poles of a stator (53), the number of magnetic poles of a first rotor (51), and the number of cores of a second rotor (52) is set to 1:m:(1+m)/2, and an ECU (60) that generates a d-axis voltage command value (Vd_c) and a q-axis voltage command value (Vq_c) according to a torque command value (Tr_c), and corrects the voltage command values when the magnitude of the vector sum of the voltage command values exceeds an upper-limit voltage (Vulmt) set according to the output voltage (Vo) of a battery (11), so as to generate a magnetic field weakening current, which reduces the magnetic flux of the magnetic poles of the first rotor.