Rotating electrical machine control device

A rotating electrical machine control device comprising:

• a rotating electric machine including a stator that includes a plurality of phase windings and a rotor that is arranged in a radial direction of the stator and includes a magnet;
• an electric power converter configured to convert a voltage of a direct current power supply into an alternating current voltage;
• an electric current detector configured to detect electric currents flowing through the plurality of phase windings based on an output signal output from an electric current sensor;
• a rotation sensor configured to output an output signal corresponding to a rotation angle of the rotor;
• a rotation calculator configured to calculate a control rotation angle of the rotor;
• a d-axis electric current command value generator configured to generate a command value of a d-axis electric current flowing through the rotating electric machine wherein a direction of a magnetic flux of the magnet is defined as a d-axis and a direction in which an electrical angle is advanced by 90 degrees as compared with that of the d-axis is defined as a q-axis;
• a q-axis electric current command value generator configured to generate a command value of a q-axis electric current flowing through the rotating electric machine;
• a voltage command value calculator configured to calculate voltage command values to be applied to the plurality of phase windings based on the control rotation angle, the electric current, the command value of the q-axis electric current, and the command value of the d-axis electric current;
• and
• a switching controller configured to drive a process of turning on or off a plurality of switching elements provided in the electric power converter based on the voltage command value, wherein
• the rotating electric machine has a value of d-axis inductance Ld larger than a value of q-axis inductance Lq, and
• the rotation calculator is configured to reduce an angle error due to a detection error of the rotation sensor based on one or more of the output signal of the rotation sensor, the electric current, and the voltage command value.