CONTROL DEVICE FOR ROTARY ELECTRIC MACHINE, CONSTRUCTION MACHINE, AND CONTROL METHOD FOR ROTARY ELECTRIC MACHINE

摘要

A control device (5) for a rotary electric machine obtains the nth-order component of the drive current supplied to a three-phase rotary electric machine (1) from the direct-current component and the primary component (with the drive current being defined as the sum of the direct-current component, the product of the fundamental harmonic of the sine wave and the direct-current component, and the product of the high harmonic of the sine wave and the direct-current component), such that the third-order component of the radial-direction force (which is the radial-direction magnetic force generated between the stator and the rotor of the rotary electric machine (1)) becomes 0, and such that the direct-current component of the torque of the rotary electric machine (1) becomes the torque command value for the rotary electric machine (1). The radial-direction force is defined as the sum of the product of the fundamental harmonic and the contribution component of the cosine wave and the product of the high harmonic and the contribution component of the cosine wave when 0 degrees is set as the value when the stator teeth and the rotor teeth oppose one another. The torque of the rotary electric machine is defined as the sum of the product of the fundamental harmonic and the contribution component of the sine wave and the product of the high harmonic and the contribution component of the sine wave when 0 degrees is set as the value when the stator teeth and the rotor teeth oppose one another.