An electric motor control device is provided which can suppress a torque ripple even when electrical characteristics on an electric motor have errors or variations. The electric motor control device comprises: a fundamental electric-current instruction generator (1) for outputting a d-axis fundamental electric-current instruction and a q-axis fundamental electric-current instruction for thereby outputting fundamental torque from an electric motor (7) having saliency; a position dependency component generator (101) for outputting a position dependency component(s) of the electric motor (7) in accordance with a rotational position of the electric motor (7); an electric current correction instruction calculator (103) for calculating a d-axis current correction instruction and a q-axis current correction instruction from the d-axis fundamental electric-current instruction and the q-axis fundamental electric-current instruction, and from the position dependency component(s); an electric current correction instruction superposition unit (2) for generating a d-axis electric current instruction and a q-axis electric current instruction by performing superposition of the d-axis current correction instruction and the q-axis current correction instruction on the d-axis fundamental electric-current instruction and the q-axis fundamental electric-current instruction, respectively; and an electric current controller (3) for controlling an electric current to flow through the electric motor (7) by way of an inverter (6), based on the d-axis electric current instruction and the q-axis electric current instruction.
MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE
MOTORSTEUERUNGSVORRICHTUNG UND ELEKTRISCHE SERVOLENKUNG
DISPOSITIF DE COMMANDE DE MOTEUR ET DISPOSITIF DE DIRECTION ASSISTÉE ÉLECTRIQUE
2023-11-29
Patent
Elektronische Ressource
Englisch
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