Apparatus for controlling rotary electric machine

An apparatus for adjusting an output voltage from an inverter to a rotary electric machine to control the rotary electric machine, the apparatus comprising:

• a first control unit configured to perform a current-feedback control routine, the current-feedback control routine being configured to:
• set a sinusoidal voltage command based on command torque for output torque of the rotary electric machine and the output currents;
• and
• compare the sinusoidal voltage command with a periodic carrier signal to control the output voltage accordingly;
• a second control unit configured to perform a torque-feedback control routine, the torque-feedback control routine being configured to:
• sample values of each of the output currents at predetermined phases, the sampled values of each of the output currents at the predetermined phases being referred to as phase-related sampled values of the corresponding output current;
• control, based on the phase-related sampled values of each of the output currents and the command torque, a waveform of the output voltage;
• and
• a switching control unit configured to:
• switch control of the rotary electric machine between the current-feedback control routine and the torque-feedback control routine;
• and
• cause the second control unit to sample values of each of the output currents at the predetermined phases while the first control unit is performing the current-feedback control routine when switching the current-feedback control routine to the torque-feedback control routine,
• the second control unit being configured to use the values of each of the output currents sampled while the first control unit is performing the current-feedback control routine as the phase-related sampled values of the corresponding output current to start the torque-feedback control routine when the current-feedback control routine is switched to the torque-feedback control routine.