Patent ID: 9450524
Filing Date: 2016-09-20
CPC Classification: H02P

Claim Text:
1. A control apparatus for a rotating machine in a system including the rotating machine having a stator, around which a winding wire is wound, and a power conversion circuit electrically connected to the rotating machine to apply a voltage to the winding wire, wherein a fluctuating angular velocity of a fundamental wave current flowing in the winding wire is defined as a fundamental angular velocity, wherein a current having a fluctuating angular velocity obtained by multiplying the fundamental angular velocity by an integer equal to or more than 2, which is defined as K, is defined as a K-th order harmonic current, and wherein an electromagnetic force acting on the rotating machine and having the fluctuating angular velocity obtained by multiplying the fundamental angular velocity by the integer is defined as a K-th order electromagnetic force, the control apparatus comprising: a superimposition device that superimposes a plurality of harmonic currents, for converting a first electromagnetic force to a second electromagnetic force, on the fundamental wave current, the first electromagnetic force being a second or higher order electromagnetic force as a reduction object, the second electromagnetic force being a second or higher order electromagnetic force and different from the first electromagnetic force, an order of each harmonic current being disposed in a range between an order of the first electromagnetic force and an order of the second electromagnetic force; and a manipulation device that operates the power conversion circuit so as to flow the fundamental wave current, on which the plurality of harmonic currents are superimposed, in the winding wire.