METHOD AND DEVICE FOR MEASURING TORQUE RIPPLES OF MOTOR, TORQUE RIPPLE SUPPRESSION METHOD AND MOTOR DRIVE UNIT WITH SUPPRESSION METHOD THEREFOR APPLIED THERETO

摘要

PPROBLEM TO BE SOLVED: To provide a method and a device for measuring torque ripples, that enables torque ripples of a motor to be measured in a simple and easy manner, without the need for a position sensor or torque meter having high accuracy, and to provide a torque ripple suppression method for suppressing its torque ripples, and a motor drive unit, to which the torque ripple suppression method is applied. PSOLUTION: A device for measuring torque ripples includes a resonator 4, that makes the number of revolutions of a servomotor 1 variable, as well as, being attached to a load 2 and having the characteristics of resonating at a single frequency in the moving direction of the load 2, and a vibration displacement sensor 3, a displacement amount measuring instrument 7 for detecting the displacement amount due to the vibration of the resonator 4. The frequency of torque ripples is determined by computation, based on the number of revolutions during resonance that are equal to the number of revolutions of the servomotor 1, when the resonator 4 resonates. PCOPYRIGHT: (C)2007,JPO&INPIT