A control device sets parameters “n”, “ad”, “pd”, “aq”, “pq” and the like of a motor parameter setting unit, corrects a d-axis current command value outputted from a d-axis current instructing unit and a q-axis current command value outputted from q-axis current instructing unit based on these parameters of the motor parameter setting unit, on a detection result of a rotation angle detection unit, and makes a (6×n)f sine component, (6×n)f cosine component, (6×(n+1))f sine component, and (6×(n+1))f cosine component of torque to zero. In such a way, 6×n and 6×(n+1) ripple components and the like, which are generated in a motor provided in elevator equipment or the like, are suppressed, and a torque ripple of the motor is reduced to a large extent.