[Problem] An object of the present invention is to provide a motor control unit that extracts a higher harmonic component, which is contained in back-EMFs of the dq-axis control system, by means of Taylor expansion (Maclaurin expansion), and suppresses a torque variation by precisely correcting a gain and a phase of the higher harmonic component for a q-axis current command value and the electric power steering apparatus equipped with the same. [Means for solving the problem] The present invention is the motor control unit that drives a brushless motor having three or more phases by using a vector control on a dq-axis rotary coordinate system, comprising: a current command value calculating section to calculate a d-axis current command value i d and a q-axis current command value i q based on a torque command value Ä c for the brushless motor, a rotational angle ¸ e and a motor angular speed É of the brushless motor, wherein the current command value calculating section extracts a higher harmonic component, which is contained in dq-axis back-EMFs of the brushless motor, by means of Taylor expansion, and corrects a gain and a phase of the higher harmonic component with a gain increasing and a phase lead, respectively, so as to compensate an attenuation due to a current control bandwidth.
MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE EQUIPPED WITH SAME
MOTORSTEUERUNGSVORRICHTUNG UND DAMIT AUSGESTATTETE ELEKTRISCHE SERVOLENKUNG
DISPOSITIF DE COMMANDE DE MOTEUR ET DISPOSITIF DE DIRECTION ASSISTÉE ÉLECTRIQUE LE COMPORTANT
2019-10-30
Patent
Elektronische Ressource
Englisch
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