Patent ID: 6653808
Filing Date: 2003-11-25
Classification: B60L,H02P,Y02T

Abstract:
An electric motor control device comprising:a controller determined by forming a reference model having ideal tracking performance and vibration reduction performance relative to a required torque in response to an operation amount of an electric motor, forming an actual model indicating an actual response of the electric motor relative to the required torque, obtaining a first rotation speed of the electric motor calculated by inputting the required torque to the reference model, obtaining a second rotation speed of the electric motor calculated by inputting the required torque to the actual model, obtaining a rotation speed difference as a difference between the first rotation speed and the second rotation speed, and determining an Hâˆžnorm of a transfer function between the required torque as an input amount and the rotation speed difference as an controlled amount to be smaller than a predetermined value, wherein an electric current to be supplied to the electric motor is controlled in response to a command torque obtained by correcting the required torque by a correction amount calculated by the controller based on the actual rotation speed of the electric motor.